Package org.freedesktop.harfbuzz

Class HarfBuzz

java.lang.Object

org.freedesktop.harfbuzz.HarfBuzz

@Generated("io.github.jwharm.JavaGI")
public final class HarfBuzz
extends Object

Constants and functions that are declared in the global HarfBuzz namespace.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	AAT_LAYOUT_NO_SELECTOR_INDEX	Used when getting or setting AAT feature selectors.
static final int	BUFFER_REPLACEMENT_CODEPOINT_DEFAULT	The default code point for replacing invalid characters in a given encoding.
static final Codepoint	CODEPOINT_INVALID	Unused hb_codepoint_t value.
static final int	FEATURE_GLOBAL_START	Special setting for hb_feature_t.start to apply the feature from the start of the buffer.
static final int	FONT_NO_VAR_NAMED_INSTANCE	Constant signifying that a font does not have any named-instance index set.
static final int	OT_LAYOUT_DEFAULT_LANGUAGE_INDEX	Special value for language index indicating default or unsupported language.
static final int	OT_LAYOUT_NO_FEATURE_INDEX	Special value for feature index indicating unsupported feature.
static final int	OT_LAYOUT_NO_SCRIPT_INDEX	Special value for script index indicating unsupported script.
static final int	OT_LAYOUT_NO_VARIATIONS_INDEX	Special value for variations index indicating unsupported variation.
static final int	OT_MAX_TAGS_PER_LANGUAGE	Maximum number of OpenType tags that can correspond to a give hb_language_t.
static final int	OT_MAX_TAGS_PER_SCRIPT	Maximum number of OpenType tags that can correspond to a give hb_script_t.
static final int	OT_VAR_NO_AXIS_INDEX	Do not use.
static final int	UNICODE_COMBINING_CLASS_CCC133	[Tibetan]
static final int	UNICODE_MAX	Maximum valid Unicode code point.
static final int	UNICODE_MAX_DECOMPOSITION_LEN	See Unicode 6.1 for details on the maximum decomposition length.
static final int	VERSION_MAJOR
static final int	VERSION_MICRO
static final int	VERSION_MINOR
static final String	VERSION_STRING

Constructor Summary

Constructors

Constructor	Description
HarfBuzz()

Method Summary

Modifier and Type	Method	Description
static OtNameId	aatLayoutFeatureTypeGetNameId(Face face, AatLayoutFeatureType featureType)	Fetches the name identifier of the specified feature type in the face's name table.
static int	aatLayoutFeatureTypeGetSelectorInfos(Face face, AatLayoutFeatureType featureType, int startOffset, @Nullable Out<AatLayoutFeatureSelectorInfo[]> selectors, @Nullable Out<Integer> defaultIndex)	Fetches a list of the selectors available for the specified feature in the given face.
static int	aatLayoutGetFeatureTypes(Face face, int startOffset, Out<AatLayoutFeatureType[]> features)	Fetches a list of the AAT feature types included in the specified face.
static Bool	aatLayoutHasPositioning(Face face)	Tests whether the specified face includes any positioning information in the kerx table.
static Bool	aatLayoutHasSubstitution(Face face)	Tests whether the specified face includes any substitutions in the morx or mort tables.
static Bool	aatLayoutHasTracking(Face face)	Tests whether the specified face includes any tracking information in the trak table.
static Blob	blobCopyWritableOrFail(Blob blob)	Makes a writable copy of blob.
static Blob	blobCreate(String data, int length, MemoryMode mode, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Creates a new "blob" object wrapping data.
static Blob	blobCreateFromFile(String fileName)	Creates a new blob containing the data from the specified binary font file.
static Blob	blobCreateFromFileOrFail(String fileName)	Creates a new blob containing the data from the specified binary font file.
static Blob	blobCreateOrFail(String data, int length, MemoryMode mode, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Creates a new "blob" object wrapping data.
static Blob	blobCreateSubBlob(Blob parent, int offset, int length)	Returns a blob that represents a range of bytes in parent.
static void	blobDestroy(Blob blob)	Decreases the reference count on blob, and if it reaches zero, destroys blob, freeing all memory, possibly calling the destroy-callback the blob was created for if it has not been called already.
static String[]	blobGetData(Blob blob)	Fetches the data from a blob.
static String[]	blobGetDataWritable(Blob blob)	Tries to make blob data writable (possibly copying it) and return pointer to data.
static Blob	blobGetEmpty()	Returns the singleton empty blob.
static int	blobGetLength(Blob blob)	Fetches the length of a blob's data.
static MemorySegment	blobGetUserData(Blob blob, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified font-functions structure.
static Bool	blobIsImmutable(Blob blob)	Tests whether a blob is immutable.
static void	blobMakeImmutable(Blob blob)	Makes a blob immutable.
static Blob	blobReference(Blob blob)	Increases the reference count on blob.
static Bool	blobSetUserData(Blob blob, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified blob.
static void	bufferAdd(Buffer buffer, Codepoint codepoint, int cluster)	Appends a character with the Unicode value of codepoint to buffer, and gives it the initial cluster value of cluster.
static void	bufferAddCodepoints(Buffer buffer, Codepoint[] text, int itemOffset, int itemLength)	Appends characters from text array to buffer.
static void	bufferAddLatin1(Buffer buffer, byte[] text, int itemOffset, int itemLength)	Similar to hb_buffer_add_codepoints(), but allows only access to first 256 Unicode code points that can fit in 8-bit strings.
static void	bufferAddUtf16(Buffer buffer, short[] text, int itemOffset, int itemLength)	See hb_buffer_add_codepoints().
static void	bufferAddUtf32(Buffer buffer, int[] text, int itemOffset, int itemLength)	See hb_buffer_add_codepoints().
static void	bufferAddUtf8(Buffer buffer, byte[] text, int itemOffset, int itemLength)	See hb_buffer_add_codepoints().
static Bool	bufferAllocationSuccessful(Buffer buffer)	Check if allocating memory for the buffer succeeded.
static void	bufferAppend(Buffer buffer, Buffer source, int start, int end)	Append (part of) contents of another buffer to this buffer.
static void	bufferClearContents(Buffer buffer)	Similar to hb_buffer_reset(), but does not clear the Unicode functions and the replacement code point.
static Buffer	bufferCreate()	Creates a new hb_buffer_t with all properties to defaults.
static Buffer	bufferCreateSimilar(Buffer src)	Creates a new hb_buffer_t, similar to hb_buffer_create().
static Bool	bufferDeserializeGlyphs(Buffer buffer, String[] buf, @Nullable Out<String> endPtr, @Nullable Font font, BufferSerializeFormat format)	Deserializes glyphs buffer from textual representation in the format produced by hb_buffer_serialize_glyphs().
static Bool	bufferDeserializeUnicode(Buffer buffer, String[] buf, @Nullable Out<String> endPtr, BufferSerializeFormat format)	Deserializes Unicode buffer from textual representation in the format produced by hb_buffer_serialize_unicode().
static void	bufferDestroy(Buffer buffer)	Deallocate the buffer.
static Set<BufferDiffFlags>	bufferDiff(Buffer buffer, Buffer reference, Codepoint dottedcircleGlyph, int positionFuzz)	If dottedcircle_glyph is (hb_codepoint_t) -1 then HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT and HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT are never returned.
static BufferClusterLevel	bufferGetClusterLevel(Buffer buffer)	Fetches the cluster level of a buffer.
static BufferContentType	bufferGetContentType(Buffer buffer)	Fetches the type of buffer contents.
static Direction	bufferGetDirection(Buffer buffer)	See hb_buffer_set_direction()
static Buffer	bufferGetEmpty()	Fetches an empty hb_buffer_t.
static Set<BufferFlags>	bufferGetFlags(Buffer buffer)	Fetches the hb_buffer_flags_t of buffer.
static GlyphInfo[]	bufferGetGlyphInfos(Buffer buffer)	Returns buffer glyph information array.
static GlyphPosition[]	bufferGetGlyphPositions(Buffer buffer)	Returns buffer glyph position array.
static Codepoint	bufferGetInvisibleGlyph(Buffer buffer)	See hb_buffer_set_invisible_glyph().
static Language	bufferGetLanguage(Buffer buffer)	See hb_buffer_set_language().
static int	bufferGetLength(Buffer buffer)	Returns the number of items in the buffer.
static Codepoint	bufferGetNotFoundGlyph(Buffer buffer)	See hb_buffer_set_not_found_glyph().
static int	bufferGetRandomState(Buffer buffer)	See hb_buffer_set_random_state().
static Codepoint	bufferGetReplacementCodepoint(Buffer buffer)	Fetches the hb_codepoint_t that replaces invalid entries for a given encoding when adding text to buffer.
static Script	bufferGetScript(Buffer buffer)	Fetches the script of buffer.
static void	bufferGetSegmentProperties(Buffer buffer, SegmentProperties props)	Sets props to the hb_segment_properties_t of buffer.
static UnicodeFuncs	bufferGetUnicodeFuncs(Buffer buffer)	Fetches the Unicode-functions structure of a buffer.
static MemorySegment	bufferGetUserData(Buffer buffer, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified buffer.
static void	bufferGuessSegmentProperties(Buffer buffer)	Sets unset buffer segment properties based on buffer Unicode contents.
static Bool	bufferHasPositions(Buffer buffer)	Returns whether buffer has glyph position data.
static void	bufferNormalizeGlyphs(Buffer buffer)	Reorders a glyph buffer to have canonical in-cluster glyph order / position.
static Bool	bufferPreAllocate(Buffer buffer, int size)	Pre allocates memory for buffer to fit at least size number of items.
static Buffer	bufferReference(Buffer buffer)	Increases the reference count on buffer by one.
static void	bufferReset(Buffer buffer)	Resets the buffer to its initial status, as if it was just newly created with hb_buffer_create().
static void	bufferReverse(Buffer buffer)	Reverses buffer contents.
static void	bufferReverseClusters(Buffer buffer)	Reverses buffer clusters.
static void	bufferReverseRange(Buffer buffer, int start, int end)	Reverses buffer contents between start and end.
static int	bufferSerialize(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, @Nullable Font font, BufferSerializeFormat format, Set<BufferSerializeFlags> flags)	Serializes buffer into a textual representation of its content, whether Unicode codepoints or glyph identifiers and positioning information.
static int	bufferSerialize(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, @Nullable Font font, BufferSerializeFormat format, BufferSerializeFlags... flags)	Serializes buffer into a textual representation of its content, whether Unicode codepoints or glyph identifiers and positioning information.
static BufferSerializeFormat	bufferSerializeFormatFromString(byte[] str)	Parses a string into an hb_buffer_serialize_format_t.
static String	bufferSerializeFormatToString(BufferSerializeFormat format)	Converts format to the string corresponding it, or NULL if it is not a valid hb_buffer_serialize_format_t.
static int	bufferSerializeGlyphs(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, @Nullable Font font, BufferSerializeFormat format, Set<BufferSerializeFlags> flags)	Serializes buffer into a textual representation of its glyph content, useful for showing the contents of the buffer, for example during debugging.
static int	bufferSerializeGlyphs(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, @Nullable Font font, BufferSerializeFormat format, BufferSerializeFlags... flags)	Serializes buffer into a textual representation of its glyph content, useful for showing the contents of the buffer, for example during debugging.
static String[]	bufferSerializeListFormats()	Returns a list of supported buffer serialization formats.
static int	bufferSerializeUnicode(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, BufferSerializeFormat format, Set<BufferSerializeFlags> flags)	Serializes buffer into a textual representation of its content, when the buffer contains Unicode codepoints (i.e., before shaping).
static int	bufferSerializeUnicode(Buffer buffer, int start, int end, Out<byte[]> buf, @Nullable Out<Integer> bufConsumed, BufferSerializeFormat format, BufferSerializeFlags... flags)	Serializes buffer into a textual representation of its content, when the buffer contains Unicode codepoints (i.e., before shaping).
static void	bufferSetClusterLevel(Buffer buffer, BufferClusterLevel clusterLevel)	Sets the cluster level of a buffer.
static void	bufferSetContentType(Buffer buffer, BufferContentType contentType)	Sets the type of buffer contents.
static void	bufferSetDirection(Buffer buffer, Direction direction)	Set the text flow direction of the buffer.
static void	bufferSetFlags(Buffer buffer, Set<BufferFlags> flags)	Sets buffer flags to flags.
static void	bufferSetFlags(Buffer buffer, BufferFlags... flags)	Sets buffer flags to flags.
static void	bufferSetInvisibleGlyph(Buffer buffer, Codepoint invisible)	Sets the hb_codepoint_t that replaces invisible characters in the shaping result.
static void	bufferSetLanguage(Buffer buffer, Language language)	Sets the language of buffer to language.
static Bool	bufferSetLength(Buffer buffer, int length)	Similar to hb_buffer_pre_allocate(), but clears any new items added at the end.
static void	bufferSetMessageFunc(Buffer buffer, BufferMessageFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_buffer_message_func_t.
static void	bufferSetNotFoundGlyph(Buffer buffer, Codepoint notFound)	Sets the hb_codepoint_t that replaces characters not found in the font during shaping.
static void	bufferSetRandomState(Buffer buffer, int state)	Sets the random state of the buffer.
static void	bufferSetReplacementCodepoint(Buffer buffer, Codepoint replacement)	Sets the hb_codepoint_t that replaces invalid entries for a given encoding when adding text to buffer.
static void	bufferSetScript(Buffer buffer, Script script)	Sets the script of buffer to script.
static void	bufferSetSegmentProperties(Buffer buffer, SegmentProperties props)	Sets the segment properties of the buffer, a shortcut for calling hb_buffer_set_direction(), hb_buffer_set_script() and hb_buffer_set_language() individually.
static void	bufferSetUnicodeFuncs(Buffer buffer, UnicodeFuncs unicodeFuncs)	Sets the Unicode-functions structure of a buffer to unicodeFuncs.
static Bool	bufferSetUserData(Buffer buffer, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified buffer.
static byte	colorGetAlpha(Color color)	Fetches the alpha channel of the given color.
static byte	colorGetBlue(Color color)	Fetches the blue channel of the given color.
static byte	colorGetGreen(Color color)	Fetches the green channel of the given color.
static byte	colorGetRed(Color color)	Fetches the red channel of the given color.
static int	colorLineGetColorStops(ColorLine colorLine, int start, @Nullable Out<ColorStop[]> colorStops)	Fetches a list of color stops from the given color line object.
static PaintExtend	colorLineGetExtend(ColorLine colorLine)	Fetches the extend mode of the color line object.
static Direction	directionFromString(byte[] str)	Converts a string to an hb_direction_t.
static String	directionToString(Direction direction)	Converts an hb_direction_t to a string.
static void	drawClosePath(DrawFuncs dfuncs, @Nullable MemorySegment drawData, DrawState st)	Perform a "close-path" draw operation.
static void	drawCubicTo(DrawFuncs dfuncs, @Nullable MemorySegment drawData, DrawState st, float control1X, float control1Y, float control2X, float control2Y, float toX, float toY)	Perform a "cubic-to" draw operation.
static DrawFuncs	drawFuncsCreate()	Creates a new draw callbacks object.
static void	drawFuncsDestroy(DrawFuncs dfuncs)	Deallocate the dfuncs.
static DrawFuncs	drawFuncsGetEmpty()	Fetches the singleton empty draw-functions structure.
static MemorySegment	drawFuncsGetUserData(DrawFuncs dfuncs, UserDataKey key)	Fetches the user-data associated with the specified key, attached to the specified draw-functions structure.
static Bool	drawFuncsIsImmutable(DrawFuncs dfuncs)	Checks whether dfuncs is immutable.
static void	drawFuncsMakeImmutable(DrawFuncs dfuncs)	Makes dfuncs object immutable.
static DrawFuncs	drawFuncsReference(DrawFuncs dfuncs)	Increases the reference count on dfuncs by one.
static void	drawFuncsSetClosePathFunc(DrawFuncs dfuncs, DrawClosePathFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets close-path callback to the draw functions object.
static void	drawFuncsSetCubicToFunc(DrawFuncs dfuncs, DrawCubicToFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets cubic-to callback to the draw functions object.
static void	drawFuncsSetLineToFunc(DrawFuncs dfuncs, DrawLineToFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets line-to callback to the draw functions object.
static void	drawFuncsSetMoveToFunc(DrawFuncs dfuncs, DrawMoveToFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets move-to callback to the draw functions object.
static void	drawFuncsSetQuadraticToFunc(DrawFuncs dfuncs, DrawQuadraticToFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets quadratic-to callback to the draw functions object.
static Bool	drawFuncsSetUserData(DrawFuncs dfuncs, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified draw-functions structure.
static void	drawLineTo(DrawFuncs dfuncs, @Nullable MemorySegment drawData, DrawState st, float toX, float toY)	Perform a "line-to" draw operation.
static void	drawMoveTo(DrawFuncs dfuncs, @Nullable MemorySegment drawData, DrawState st, float toX, float toY)	Perform a "move-to" draw operation.
static void	drawQuadraticTo(DrawFuncs dfuncs, @Nullable MemorySegment drawData, DrawState st, float controlX, float controlY, float toX, float toY)	Perform a "quadratic-to" draw operation.
static Bool	faceBuilderAddTable(Face face, Tag tag, Blob blob)	Add table for tag with data provided by blob to the face.
static Face	faceBuilderCreate()	Creates a hb_face_t that can be used with hb_face_builder_add_table().
static void	faceBuilderSortTables(Face face, Tag[] tags)	Set the ordering of tables for serialization.
static void	faceCollectNominalGlyphMapping(Face face, Map mapping, @Nullable Set unicodes)	Collects the mapping from Unicode characters to nominal glyphs of the face, and optionally all of the Unicode characters covered by face.
static void	faceCollectUnicodes(Face face, Set out)	Collects all of the Unicode characters covered by face and adds them to the hb_set_t set out.
static void	faceCollectVariationSelectors(Face face, Set out)	Collects all Unicode "Variation Selector" characters covered by face and adds them to the hb_set_t set out.
static void	faceCollectVariationUnicodes(Face face, Codepoint variationSelector, Set out)	Collects all Unicode characters for variationSelector covered by face and adds them to the hb_set_t set out.
static int	faceCount(Blob blob)	Fetches the number of faces in a blob.
static Face	faceCreate(Blob blob, int index)	Constructs a new face object from the specified blob and a face index into that blob.
static Face	faceCreateForTables(ReferenceTableFunc referenceTableFunc, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Variant of hb_face_create(), built for those cases where it is more convenient to provide data for individual tables instead of the whole font data.
static void	faceDestroy(Face face)	Decreases the reference count on a face object.
static Face	faceGetEmpty()	Fetches the singleton empty face object.
static int	faceGetGlyphCount(Face face)	Fetches the glyph-count value of the specified face object.
static int	faceGetIndex(Face face)	Fetches the face-index corresponding to the given face.
static int	faceGetTableTags(Face face, int startOffset, Out<Tag[]> tableTags)	Fetches a list of all table tags for a face, if possible.
static int	faceGetUpem(Face face)	Fetches the units-per-em (UPEM) value of the specified face object.
static MemorySegment	faceGetUserData(Face face, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified face object.
static Bool	faceIsImmutable(Face face)	Tests whether the given face object is immutable.
static void	faceMakeImmutable(Face face)	Makes the given face object immutable.
static Face	faceReference(Face face)	Increases the reference count on a face object.
static Blob	faceReferenceBlob(Face face)	Fetches a pointer to the binary blob that contains the specified face.
static Blob	faceReferenceTable(Face face, Tag tag)	Fetches a reference to the specified table within the specified face.
static void	faceSetGlyphCount(Face face, int glyphCount)	Sets the glyph count for a face object to the specified value.
static void	faceSetIndex(Face face, int index)	Assigns the specified face-index to face.
static void	faceSetUpem(Face face, int upem)	Sets the units-per-em (upem) for a face object to the specified value.
static Bool	faceSetUserData(Face face, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the given face object.
static Bool	featureFromString(byte[] str, Feature feature)	Parses a string into a hb_feature_t.
static void	featureToString(Feature feature, Out<String[]> buf)	Converts a hb_feature_t into a NULL-terminated string in the format understood by hb_feature_from_string().
static void	fontAddGlyphOriginForDirection(Font font, Codepoint glyph, Direction direction, Position x, Position y)	Adds the origin coordinates to an (X,Y) point coordinate, in the specified glyph ID in the specified font.
static void	fontChanged(Font font)	Notifies the font that underlying font data has changed.
static Font	fontCreate(Face face)	Constructs a new font object from the specified face.
static Font	fontCreateSubFont(Font parent)	Constructs a sub-font font object from the specified parent font, replicating the parent's properties.
static void	fontDestroy(Font font)	Decreases the reference count on the given font object.
static void	fontDrawGlyph(Font font, Codepoint glyph, DrawFuncs dfuncs, @Nullable MemorySegment drawData)	Draws the outline that corresponds to a glyph in the specified font.
static FontFuncs	fontFuncsCreate()	Creates a new hb_font_funcs_t structure of font functions.
static void	fontFuncsDestroy(FontFuncs ffuncs)	Decreases the reference count on a font-functions structure.
static FontFuncs	fontFuncsGetEmpty()	Fetches an empty font-functions structure.
static MemorySegment	fontFuncsGetUserData(FontFuncs ffuncs, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified font-functions structure.
static Bool	fontFuncsIsImmutable(FontFuncs ffuncs)	Tests whether a font-functions structure is immutable.
static void	fontFuncsMakeImmutable(FontFuncs ffuncs)	Makes a font-functions structure immutable.
static FontFuncs	fontFuncsReference(FontFuncs ffuncs)	Increases the reference count on a font-functions structure.
static void	fontFuncsSetDrawGlyphFunc(FontFuncs ffuncs, FontDrawGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_draw_glyph_func_t.
static void	fontFuncsSetFontHExtentsFunc(FontFuncs ffuncs, FontGetFontHExtentsFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_font_h_extents_func_t.
static void	fontFuncsSetFontVExtentsFunc(FontFuncs ffuncs, FontGetFontVExtentsFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_font_v_extents_func_t.
static void	fontFuncsSetGlyphContourPointFunc(FontFuncs ffuncs, FontGetGlyphContourPointFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_contour_point_func_t.
static void	fontFuncsSetGlyphExtentsFunc(FontFuncs ffuncs, FontGetGlyphExtentsFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_extents_func_t.
static void	fontFuncsSetGlyphFromNameFunc(FontFuncs ffuncs, FontGetGlyphFromNameFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_from_name_func_t.
static void	fontFuncsSetGlyphFunc(FontFuncs ffuncs, FontGetGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Deprecated.
static void	fontFuncsSetGlyphHAdvanceFunc(FontFuncs ffuncs, FontGetGlyphHAdvanceFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_h_advance_func_t.
static void	fontFuncsSetGlyphHAdvancesFunc(FontFuncs ffuncs, FontGetGlyphHAdvancesFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_h_advances_func_t.
static void	fontFuncsSetGlyphHKerningFunc(FontFuncs ffuncs, FontGetGlyphHKerningFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_h_kerning_func_t.
static void	fontFuncsSetGlyphHOriginFunc(FontFuncs ffuncs, FontGetGlyphHOriginFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_h_origin_func_t.
static void	fontFuncsSetGlyphNameFunc(FontFuncs ffuncs, FontGetGlyphNameFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_name_func_t.
static void	fontFuncsSetGlyphShapeFunc(FontFuncs ffuncs, FontGetGlyphShapeFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Deprecated. Use hb_font_funcs_set_draw_glyph_func() instead
static void	fontFuncsSetGlyphVAdvanceFunc(FontFuncs ffuncs, FontGetGlyphVAdvanceFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_v_advance_func_t.
static void	fontFuncsSetGlyphVAdvancesFunc(FontFuncs ffuncs, FontGetGlyphVAdvancesFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_v_advances_func_t.
static void	fontFuncsSetGlyphVKerningFunc(FontFuncs ffuncs, FontGetGlyphVKerningFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Deprecated.
static void	fontFuncsSetGlyphVOriginFunc(FontFuncs ffuncs, FontGetGlyphVOriginFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_glyph_v_origin_func_t.
static void	fontFuncsSetNominalGlyphFunc(FontFuncs ffuncs, FontGetNominalGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_nominal_glyph_func_t.
static void	fontFuncsSetNominalGlyphsFunc(FontFuncs ffuncs, FontGetNominalGlyphsFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_nominal_glyphs_func_t.
static void	fontFuncsSetPaintGlyphFunc(FontFuncs ffuncs, FontPaintGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_paint_glyph_func_t.
static Bool	fontFuncsSetUserData(FontFuncs ffuncs, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified font-functions structure.
static void	fontFuncsSetVariationGlyphFunc(FontFuncs ffuncs, FontGetVariationGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_font_get_variation_glyph_func_t.
static Font	fontGetEmpty()	Fetches the empty font object.
static void	fontGetExtentsForDirection(Font font, Direction direction, FontExtents extents)	Fetches the extents for a font in a text segment of the specified direction.
static Face	fontGetFace(Font font)	Fetches the face associated with the specified font object.
static Bool	fontGetGlyph(Font font, Codepoint unicode, Codepoint variationSelector, Codepoint glyph)	Fetches the glyph ID for a Unicode code point in the specified font, with an optional variation selector.
static void	fontGetGlyphAdvanceForDirection(Font font, Codepoint glyph, Direction direction, Position x, Position y)	Fetches the advance for a glyph ID from the specified font, in a text segment of the specified direction.
static void	fontGetGlyphAdvancesForDirection(Font font, Direction direction, int count, Codepoint firstGlyph, int glyphStride, Position firstAdvance, int advanceStride)	Fetches the advances for a sequence of glyph IDs in the specified font, in a text segment of the specified direction.
static Bool	fontGetGlyphContourPoint(Font font, Codepoint glyph, int pointIndex, Position x, Position y)	Fetches the (x,y) coordinates of a specified contour-point index in the specified glyph, within the specified font.
static Bool	fontGetGlyphContourPointForOrigin(Font font, Codepoint glyph, int pointIndex, Direction direction, Position x, Position y)	Fetches the (X,Y) coordinates of a specified contour-point index in the specified glyph ID in the specified font, with respect to the origin in a text segment in the specified direction.
static Bool	fontGetGlyphExtents(Font font, Codepoint glyph, GlyphExtents extents)	Fetches the hb_glyph_extents_t data for a glyph ID in the specified font.
static Bool	fontGetGlyphExtentsForOrigin(Font font, Codepoint glyph, Direction direction, GlyphExtents extents)	Fetches the hb_glyph_extents_t data for a glyph ID in the specified font, with respect to the origin in a text segment in the specified direction.
static Bool	fontGetGlyphFromName(Font font, String[] name, Codepoint glyph)	Fetches the glyph ID that corresponds to a name string in the specified font.
static Position	fontGetGlyphHAdvance(Font font, Codepoint glyph)	Fetches the advance for a glyph ID in the specified font, for horizontal text segments.
static void	fontGetGlyphHAdvances(Font font, int count, Codepoint firstGlyph, int glyphStride, Position firstAdvance, int advanceStride)	Fetches the advances for a sequence of glyph IDs in the specified font, for horizontal text segments.
static Position	fontGetGlyphHKerning(Font font, Codepoint leftGlyph, Codepoint rightGlyph)	Fetches the kerning-adjustment value for a glyph-pair in the specified font, for horizontal text segments.
static Bool	fontGetGlyphHOrigin(Font font, Codepoint glyph, Position x, Position y)	Fetches the (X,Y) coordinates of the origin for a glyph ID in the specified font, for horizontal text segments.
static void	fontGetGlyphKerningForDirection(Font font, Codepoint firstGlyph, Codepoint secondGlyph, Direction direction, Position x, Position y)	Fetches the kerning-adjustment value for a glyph-pair in the specified font.
static Bool	fontGetGlyphName(Font font, Codepoint glyph, Out<String[]> name)	Fetches the glyph-name string for a glyph ID in the specified font.
static void	fontGetGlyphOriginForDirection(Font font, Codepoint glyph, Direction direction, Position x, Position y)	Fetches the (X,Y) coordinates of the origin for a glyph in the specified font.
static void	fontGetGlyphShape(Font font, Codepoint glyph, DrawFuncs dfuncs, @Nullable MemorySegment drawData)	Deprecated. Use hb_font_draw_glyph() instead
static Position	fontGetGlyphVAdvance(Font font, Codepoint glyph)	Fetches the advance for a glyph ID in the specified font, for vertical text segments.
static void	fontGetGlyphVAdvances(Font font, int count, Codepoint firstGlyph, int glyphStride, Position firstAdvance, int advanceStride)	Fetches the advances for a sequence of glyph IDs in the specified font, for vertical text segments.
static Position	fontGetGlyphVKerning(Font font, Codepoint topGlyph, Codepoint bottomGlyph)	Deprecated.
static Bool	fontGetGlyphVOrigin(Font font, Codepoint glyph, Position x, Position y)	Fetches the (X,Y) coordinates of the origin for a glyph ID in the specified font, for vertical text segments.
static Bool	fontGetHExtents(Font font, FontExtents extents)	Fetches the extents for a specified font, for horizontal text segments.
static Bool	fontGetNominalGlyph(Font font, Codepoint unicode, Codepoint glyph)	Fetches the nominal glyph ID for a Unicode code point in the specified font.
static int	fontGetNominalGlyphs(Font font, int count, Codepoint firstUnicode, int unicodeStride, Codepoint firstGlyph, int glyphStride)	Fetches the nominal glyph IDs for a sequence of Unicode code points.
static Font	fontGetParent(Font font)	Fetches the parent font of font.
static void	fontGetPpem(Font font, Out<Integer> xPpem, Out<Integer> yPpem)	Fetches the horizontal and vertical points-per-em (ppem) of a font.
static float	fontGetPtem(Font font)	Fetches the "point size" of a font.
static void	fontGetScale(Font font, Out<Integer> xScale, Out<Integer> yScale)	Fetches the horizontal and vertical scale of a font.
static int	fontGetSerial(Font font)	Returns the internal serial number of the font.
static void	fontGetSyntheticBold(Font font, Out<Float> xEmbolden, Out<Float> yEmbolden, Bool inPlace)	Fetches the "synthetic boldness" parameters of a font.
static float	fontGetSyntheticSlant(Font font)	Fetches the "synthetic slant" of a font.
static MemorySegment	fontGetUserData(Font font, UserDataKey key)	Fetches the user-data object associated with the specified key, attached to the specified font object.
static MemorySegment	fontGetVarCoordsDesign(Font font, Out<Integer> length)	Fetches the list of variation coordinates (in design-space units) currently set on a font.
static MemorySegment	fontGetVarCoordsNormalized(Font font, Out<Integer> length)	Fetches the list of normalized variation coordinates currently set on a font.
static Bool	fontGetVariationGlyph(Font font, Codepoint unicode, Codepoint variationSelector, Codepoint glyph)	Fetches the glyph ID for a Unicode code point when followed by by the specified variation-selector code point, in the specified font.
static int	fontGetVarNamedInstance(Font font)	Returns the currently-set named-instance index of the font.
static Bool	fontGetVExtents(Font font, FontExtents extents)	Fetches the extents for a specified font, for vertical text segments.
static Bool	fontGlyphFromString(Font font, byte[] s, Codepoint glyph)	Fetches the glyph ID from font that matches the specified string.
static void	fontGlyphToString(Font font, Codepoint glyph, Out<String[]> s)	Fetches the name of the specified glyph ID in font and returns it in string s.
static Bool	fontIsImmutable(Font font)	Tests whether a font object is immutable.
static void	fontMakeImmutable(Font font)	Makes font immutable.
static void	fontPaintGlyph(Font font, Codepoint glyph, PaintFuncs pfuncs, @Nullable MemorySegment paintData, int paletteIndex, Color foreground)	Paints the glyph.
static Font	fontReference(Font font)	Increases the reference count on the given font object.
static void	fontSetFace(Font font, Face face)	Sets face as the font-face value of font.
static void	fontSetFuncs(Font font, FontFuncs klass, @Nullable MemorySegment fontData, @Nullable DestroyFunc destroy)	Replaces the font-functions structure attached to a font, updating the font's user-data with font-data and the destroy callback.
static void	fontSetFuncsData(Font font, @Nullable MemorySegment fontData, @Nullable DestroyFunc destroy)	Replaces the user data attached to a font, updating the font's destroy callback.
static void	fontSetParent(Font font, Font parent)	Sets the parent font of font.
static void	fontSetPpem(Font font, int xPpem, int yPpem)	Sets the horizontal and vertical pixels-per-em (PPEM) of a font.
static void	fontSetPtem(Font font, float ptem)	Sets the "point size" of a font.
static void	fontSetScale(Font font, int xScale, int yScale)	Sets the horizontal and vertical scale of a font.
static void	fontSetSyntheticBold(Font font, float xEmbolden, float yEmbolden, Bool inPlace)	Sets the "synthetic boldness" of a font.
static void	fontSetSyntheticSlant(Font font, float slant)	Sets the "synthetic slant" of a font.
static Bool	fontSetUserData(Font font, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified font object.
static void	fontSetVarCoordsDesign(Font font, float[] coords)	Applies a list of variation coordinates (in design-space units) to a font.
static void	fontSetVarCoordsNormalized(Font font, int[] coords)	Applies a list of variation coordinates (in normalized units) to a font.
static void	fontSetVariation(Font font, Tag tag, float value)	Change the value of one variation axis on the font.
static void	fontSetVariations(Font font, Variation[] variations)	Applies a list of font-variation settings to a font.
static void	fontSetVarNamedInstance(Font font, int instanceIndex)	Sets design coords of a font from a named-instance index.
static void	fontSubtractGlyphOriginForDirection(Font font, Codepoint glyph, Direction direction, Position x, Position y)	Subtracts the origin coordinates from an (X,Y) point coordinate, in the specified glyph ID in the specified font.
static Face	ftFaceCreate(org.freedesktop.freetype.Face ftFace, @Nullable DestroyFunc destroy)	Creates an hb_face_t face object from the specified FT_Face.
static Face	ftFaceCreateCached(org.freedesktop.freetype.Face ftFace)	Creates an hb_face_t face object from the specified FT_Face.
static Face	ftFaceCreateReferenced(org.freedesktop.freetype.Face ftFace)	Creates an hb_face_t face object from the specified FT_Face.
static void	ftFontChanged(Font font)	Refreshes the state of font when the underlying FT_Face has changed.
static Font	ftFontCreate(org.freedesktop.freetype.Face ftFace, @Nullable DestroyFunc destroy)	Creates an hb_font_t font object from the specified FT_Face.
static Font	ftFontCreateReferenced(org.freedesktop.freetype.Face ftFace)	Creates an hb_font_t font object from the specified FT_Face.
static org.freedesktop.freetype.Face	ftFontGetFace(Font font)	Fetches the FT_Face associated with the specified hb_font_t font object.
static int	ftFontGetLoadFlags(Font font)	Fetches the FT_Load_Glyph load flags of the specified hb_font_t.
static org.freedesktop.freetype.Face	ftFontLockFace(Font font)	Gets the FT_Face associated with font.
static void	ftFontSetFuncs(Font font)	Configures the font-functions structure of the specified hb_font_t font object to use FreeType font functions.
static void	ftFontSetLoadFlags(Font font, int loadFlags)	Sets the FT_Load_Glyph load flags for the specified hb_font_t.
static void	ftFontUnlockFace(Font font)	Releases an FT_Face previously obtained with hb_ft_font_lock_face().
static Bool	ftHbFontChanged(Font font)	Refreshes the state of the underlying FT_Face of font when the hb_font_t font has changed.
static Blob	glibBlobCreate(Bytes gbytes)	Creates an hb_blob_t blob from the specified GBytes data structure.
static UnicodeFuncs	glibGetUnicodeFuncs()	Fetches a Unicode-functions structure that is populated with the appropriate GLib function for each method.
static UnicodeScript	glibScriptFromScript(Script script)	Fetches the GUnicodeScript identifier that corresponds to the specified hb_script_t script.
static Script	glibScriptToScript(UnicodeScript script)	Fetches the hb_script_t script that corresponds to the specified GUnicodeScript identifier.
static Set<GlyphFlags>	glyphInfoGetGlyphFlags(GlyphInfo info)	Returns glyph flags encoded within a hb_glyph_info_t.
static void	javagi$ensureInitialized()
static Language	languageFromString(byte[] str)	Converts str representing a BCP 47 language tag to the corresponding hb_language_t.
static Language	languageGetDefault()	Fetch the default language from current locale.
static Bool	languageMatches(Language language, Language specific)	Check whether a second language tag is the same or a more specific version of the provided language tag.
static String	languageToString(Language language)	Converts an hb_language_t to a string.
static Bool	mapAllocationSuccessful(Map map)	Tests whether memory allocation for a set was successful.
static void	mapClear(Map map)	Clears out the contents of map.
static Map	mapCopy(Map map)	Allocate a copy of map.
static Map	mapCreate()	Creates a new, initially empty map.
static void	mapDel(Map map, Codepoint key)	Removes key and its stored value from map.
static void	mapDestroy(Map map)	Decreases the reference count on a map.
static Codepoint	mapGet(Map map, Codepoint key)	Fetches the value stored for key in map.
static Map	mapGetEmpty()	Fetches the singleton empty hb_map_t.
static int	mapGetPopulation(Map map)	Returns the number of key-value pairs in the map.
static MemorySegment	mapGetUserData(Map map, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified map.
static Bool	mapHas(Map map, Codepoint key)	Tests whether key is an element of map.
static int	mapHash(Map map)	Creates a hash representing map.
static Bool	mapIsEmpty(Map map)	Tests whether map is empty (contains no elements).
static Bool	mapIsEqual(Map map, Map other)	Tests whether map and other are equal (contain the same elements).
static void	mapKeys(Map map, Set keys)	Add the keys of map to keys.
static Bool	mapNext(Map map, Out<Integer> idx, Codepoint key, Codepoint value)	Fetches the next key/value pair in map.
static Map	mapReference(Map map)	Increases the reference count on a map.
static void	mapSet(Map map, Codepoint key, Codepoint value)	Stores key:value in the map.
static Bool	mapSetUserData(Map map, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified map.
static void	mapUpdate(Map map, Map other)	Add the contents of other to map.
static void	mapValues(Map map, Set values)	Add the values of map to values.
static int	otColorGlyphGetLayers(Face face, Codepoint glyph, int startOffset, @Nullable Out<OtColorLayer[]> layers)	Fetches a list of all color layers for the specified glyph index in the specified face.
static Bool	otColorGlyphHasPaint(Face face, Codepoint glyph)	Tests where a face includes COLRv1 paint data for glyph.
static Blob	otColorGlyphReferencePng(Font font, Codepoint glyph)	Fetches the PNG image for a glyph.
static Blob	otColorGlyphReferenceSvg(Face face, Codepoint glyph)	Fetches the SVG document for a glyph.
static Bool	otColorHasLayers(Face face)	Tests whether a face includes a COLR table with data according to COLRv0.
static Bool	otColorHasPaint(Face face)	Tests where a face includes a COLR table with data according to COLRv1.
static Bool	otColorHasPalettes(Face face)	Tests whether a face includes a CPAL color-palette table.
static Bool	otColorHasPng(Face face)	Tests whether a face has PNG glyph images (either in CBDT or sbix tables).
static Bool	otColorHasSvg(Face face)	Tests whether a face includes any SVG glyph images.
static OtNameId	otColorPaletteColorGetNameId(Face face, int colorIndex)	Fetches the name table Name ID that provides display names for the specified color in a face's CPAL color palette.
static int	otColorPaletteGetColors(Face face, int paletteIndex, int startOffset, @Nullable Out<Color[]> colors)	Fetches a list of the colors in a color palette.
static int	otColorPaletteGetCount(Face face)	Fetches the number of color palettes in a face.
static Set<OtColorPaletteFlags>	otColorPaletteGetFlags(Face face, int paletteIndex)	Fetches the flags defined for a color palette.
static OtNameId	otColorPaletteGetNameId(Face face, int paletteIndex)	Fetches the name table Name ID that provides display names for a CPAL color palette.
static void	otFontSetFuncs(Font font)	Sets the font functions to use when working with font.
static void	otLayoutCollectFeatures(Face face, Tag tableTag, @Nullable Tag[] scripts, @Nullable Tag[] languages, @Nullable Tag[] features, Set featureIndexes)	Fetches a list of all feature indexes in the specified face's GSUB table or GPOS table, underneath the specified scripts, languages, and features.
static void	otLayoutCollectFeaturesMap(Face face, Tag tableTag, int scriptIndex, int languageIndex, Map featureMap)	Fetches the mapping from feature tags to feature indexes for the specified script and language.
static void	otLayoutCollectLookups(Face face, Tag tableTag, @Nullable Tag[] scripts, @Nullable Tag[] languages, @Nullable Tag[] features, Set lookupIndexes)	Fetches a list of all feature-lookup indexes in the specified face's GSUB table or GPOS table, underneath the specified scripts, languages, and features.
static int	otLayoutFeatureGetCharacters(Face face, Tag tableTag, int featureIndex, int startOffset, Out<Codepoint[]> characters)	Fetches a list of the characters defined as having a variant under the specified "Character Variant" ("cvXX") feature tag.
static int	otLayoutFeatureGetLookups(Face face, Tag tableTag, int featureIndex, int startOffset, Out<int[]> lookupIndexes)	Fetches a list of all lookups enumerated for the specified feature, in the specified face's GSUB table or GPOS table.
static Bool	otLayoutFeatureGetNameIds(Face face, Tag tableTag, int featureIndex, @Nullable OtNameId labelId, @Nullable OtNameId tooltipId, @Nullable OtNameId sampleId, @Nullable Out<Integer> numNamedParameters, @Nullable OtNameId firstParamId)	Fetches name indices from feature parameters for "Stylistic Set" ('ssXX') or "Character Variant" ('cvXX') features.
static int	otLayoutFeatureWithVariationsGetLookups(Face face, Tag tableTag, int featureIndex, int variationsIndex, int startOffset, Out<int[]> lookupIndexes)	Fetches a list of all lookups enumerated for the specified feature, in the specified face's GSUB table or GPOS table, enabled at the specified variations index.
static int	otLayoutGetAttachPoints(Face face, Codepoint glyph, int startOffset, Out<int[]> pointArray)	Fetches a list of all attachment points for the specified glyph in the GDEF table of the face.
static Bool	otLayoutGetBaseline(Font font, OtLayoutBaselineTag baselineTag, Direction direction, Tag scriptTag, Tag languageTag, @Nullable Position coord)	Fetches a baseline value from the face.
static Bool	otLayoutGetBaseline2(Font font, OtLayoutBaselineTag baselineTag, Direction direction, Script script, @Nullable Language language, @Nullable Position coord)	Fetches a baseline value from the face.
static void	otLayoutGetBaselineWithFallback(Font font, OtLayoutBaselineTag baselineTag, Direction direction, Tag scriptTag, Tag languageTag, Position coord)	Fetches a baseline value from the face, and synthesizes it if the font does not have it.
static void	otLayoutGetBaselineWithFallback2(Font font, OtLayoutBaselineTag baselineTag, Direction direction, Script script, @Nullable Language language, Position coord)	Fetches a baseline value from the face, and synthesizes it if the font does not have it.
static Bool	otLayoutGetFontExtents(Font font, Direction direction, Tag scriptTag, Tag languageTag, @Nullable FontExtents extents)	Fetches script/language-specific font extents.
static Bool	otLayoutGetFontExtents2(Font font, Direction direction, Script script, @Nullable Language language, @Nullable FontExtents extents)	Fetches script/language-specific font extents.
static OtLayoutGlyphClass	otLayoutGetGlyphClass(Face face, Codepoint glyph)	Fetches the GDEF class of the requested glyph in the specified face.
static void	otLayoutGetGlyphsInClass(Face face, OtLayoutGlyphClass klass, Set glyphs)	Retrieves the set of all glyphs from the face that belong to the requested glyph class in the face's GDEF table.
static OtLayoutBaselineTag	otLayoutGetHorizontalBaselineTagForScript(Script script)	Fetches the dominant horizontal baseline tag used by script.
static int	otLayoutGetLigatureCarets(Font font, Direction direction, Codepoint glyph, int startOffset, Out<Position[]> caretArray)	Fetches a list of the caret positions defined for a ligature glyph in the GDEF table of the font.
static Bool	otLayoutGetSizeParams(Face face, Out<Integer> designSize, Out<Integer> subfamilyId, OtNameId subfamilyNameId, Out<Integer> rangeStart, Out<Integer> rangeEnd)	Fetches optical-size feature data (i.e., the size feature from GPOS).
static Bool	otLayoutHasGlyphClasses(Face face)	Tests whether a face has any glyph classes defined in its GDEF table.
static Bool	otLayoutHasPositioning(Face face)	Tests whether the specified face includes any GPOS positioning.
static Bool	otLayoutHasSubstitution(Face face)	Tests whether the specified face includes any GSUB substitutions.
static Bool	otLayoutLanguageFindFeature(Face face, Tag tableTag, int scriptIndex, int languageIndex, Tag featureTag, Out<Integer> featureIndex)	Fetches the index of a given feature tag in the specified face's GSUB table or GPOS table, underneath the specified script and language.
static int	otLayoutLanguageGetFeatureIndexes(Face face, Tag tableTag, int scriptIndex, int languageIndex, int startOffset, Out<int[]> featureIndexes)	Fetches a list of all features in the specified face's GSUB table or GPOS table, underneath the specified script and language.
static int	otLayoutLanguageGetFeatureTags(Face face, Tag tableTag, int scriptIndex, int languageIndex, int startOffset, Out<Tag[]> featureTags)	Fetches a list of all features in the specified face's GSUB table or GPOS table, underneath the specified script and language.
static Bool	otLayoutLanguageGetRequiredFeature(Face face, Tag tableTag, int scriptIndex, int languageIndex, Out<Integer> featureIndex, Tag featureTag)	Fetches the tag of a requested feature index in the given face's GSUB or GPOS table, underneath the specified script and language.
static Bool	otLayoutLanguageGetRequiredFeatureIndex(Face face, Tag tableTag, int scriptIndex, int languageIndex, Out<Integer> featureIndex)	Fetches the index of a requested feature in the given face's GSUB or GPOS table, underneath the specified script and language.
static void	otLayoutLookupCollectGlyphs(Face face, Tag tableTag, int lookupIndex, Set glyphsBefore, Set glyphsInput, Set glyphsAfter, Set glyphsOutput)	Fetches a list of all glyphs affected by the specified lookup in the specified face's GSUB table or GPOS table.
static int	otLayoutLookupGetGlyphAlternates(Face face, int lookupIndex, Codepoint glyph, int startOffset, Out<Codepoint[]> alternateGlyphs)	Fetches alternates of a glyph from a given GSUB lookup index.
static Position	otLayoutLookupGetOpticalBound(Font font, int lookupIndex, Direction direction, Codepoint glyph)	Fetches the optical bound of a glyph positioned at the margin of text.
static void	otLayoutLookupsSubstituteClosure(Face face, Set lookups, Set glyphs)	Compute the transitive closure of glyphs needed for all of the provided lookups.
static void	otLayoutLookupSubstituteClosure(Face face, int lookupIndex, Set glyphs)	Compute the transitive closure of glyphs needed for a specified lookup.
static Bool	otLayoutLookupWouldSubstitute(Face face, int lookupIndex, Codepoint glyphs, int glyphsLength, Bool zeroContext)	Tests whether a specified lookup in the specified face would trigger a substitution on the given glyph sequence.
static Bool	otLayoutScriptFindLanguage(Face face, Tag tableTag, int scriptIndex, Tag languageTag, MemorySegment languageIndex)	Deprecated.
static int	otLayoutScriptGetLanguageTags(Face face, Tag tableTag, int scriptIndex, int startOffset, Out<Tag[]> languageTags)	Fetches a list of language tags in the given face's GSUB or GPOS table, underneath the specified script index.
static Bool	otLayoutScriptSelectLanguage(Face face, Tag tableTag, int scriptIndex, int languageCount, Tag languageTags, Out<Integer> languageIndex)	Fetches the index of the first language tag fom languageTags that is present in the specified face's GSUB or GPOS table, underneath the specified script index.
static Bool	otLayoutScriptSelectLanguage2(Face face, Tag tableTag, int scriptIndex, int languageCount, Tag languageTags, Out<Integer> languageIndex, Tag chosenLanguage)	Fetches the index of the first language tag fom languageTags that is present in the specified face's GSUB or GPOS table, underneath the specified script index.
static Bool	otLayoutTableChooseScript(Face face, Tag tableTag, Tag scriptTags, Out<Integer> scriptIndex, Tag chosenScript)	Deprecated since 2.0.0
static Bool	otLayoutTableFindFeatureVariations(Face face, Tag tableTag, MemorySegment coords, int numCoords, Out<Integer> variationsIndex)	Fetches a list of feature variations in the specified face's GSUB table or GPOS table, at the specified variation coordinates.
static Bool	otLayoutTableFindScript(Face face, Tag tableTag, Tag scriptTag, Out<Integer> scriptIndex)	Fetches the index if a given script tag in the specified face's GSUB table or GPOS table.
static int	otLayoutTableGetFeatureTags(Face face, Tag tableTag, int startOffset, Out<Tag[]> featureTags)	Fetches a list of all feature tags in the given face's GSUB or GPOS table.
static int	otLayoutTableGetLookupCount(Face face, Tag tableTag)	Fetches the total number of lookups enumerated in the specified face's GSUB table or GPOS table.
static int	otLayoutTableGetScriptTags(Face face, Tag tableTag, int startOffset, Out<Tag[]> scriptTags)	Fetches a list of all scripts enumerated in the specified face's GSUB table or GPOS table.
static Bool	otLayoutTableSelectScript(Face face, Tag tableTag, int scriptCount, Tag scriptTags, @Nullable Out<Integer> scriptIndex, @Nullable Tag chosenScript)	Selects an OpenType script for tableTag from the scriptTags array.
static Position	otMathGetConstant(Font font, OtMathConstant constant)	Fetches the specified math constant.
static int	otMathGetGlyphAssembly(Font font, Codepoint glyph, Direction direction, int startOffset, Out<OtMathGlyphPart[]> parts, Position italicsCorrection)	Fetches the GlyphAssembly for the specified font, glyph index, and direction.
static Position	otMathGetGlyphItalicsCorrection(Font font, Codepoint glyph)	Fetches an italics-correction value (if one exists) for the specified glyph index.
static Position	otMathGetGlyphKerning(Font font, Codepoint glyph, OtMathKern kern, Position correctionHeight)	Fetches the math kerning (cut-ins) value for the specified font, glyph index, and kern.
static int	otMathGetGlyphKernings(Font font, Codepoint glyph, OtMathKern kern, int startOffset, Out<OtMathKernEntry[]> kernEntries)	Fetches the raw MathKern (cut-in) data for the specified font, glyph index, and kern.
static Position	otMathGetGlyphTopAccentAttachment(Font font, Codepoint glyph)	Fetches a top-accent-attachment value (if one exists) for the specified glyph index.
static int	otMathGetGlyphVariants(Font font, Codepoint glyph, Direction direction, int startOffset, Out<OtMathGlyphVariant[]> variants)	Fetches the MathGlyphConstruction for the specified font, glyph index, and direction.
static Position	otMathGetMinConnectorOverlap(Font font, Direction direction)	Fetches the MathVariants table for the specified font and returns the minimum overlap of connecting glyphs that are required to draw a glyph assembly in the specified direction.
static Bool	otMathHasData(Face face)	Tests whether a face has a MATH table.
static Bool	otMathIsGlyphExtendedShape(Face face, Codepoint glyph)	Tests whether the given glyph index is an extended shape in the face.
static int	otMetaGetEntryTags(Face face, int startOffset, Out<OtMetaTag[]> entries)	Fetches all available feature types.
static Blob	otMetaReferenceEntry(Face face, OtMetaTag metaTag)	It fetches metadata entry of a given tag from a font.
static Bool	otMetricsGetPosition(Font font, OtMetricsTag metricsTag, @Nullable Position position)	Fetches metrics value corresponding to metricsTag from font.
static void	otMetricsGetPositionWithFallback(Font font, OtMetricsTag metricsTag, @Nullable Position position)	Fetches metrics value corresponding to metricsTag from font, and synthesizes a value if it the value is missing in the font.
static float	otMetricsGetVariation(Font font, OtMetricsTag metricsTag)	Fetches metrics value corresponding to metricsTag from font with the current font variation settings applied.
static Position	otMetricsGetXVariation(Font font, OtMetricsTag metricsTag)	Fetches horizontal metrics value corresponding to metricsTag from font with the current font variation settings applied.
static Position	otMetricsGetYVariation(Font font, OtMetricsTag metricsTag)	Fetches vertical metrics value corresponding to metricsTag from font with the current font variation settings applied.
static int	otNameGetUtf16(Face face, OtNameId nameId, Language language, Out<short[]> text)	Fetches a font name from the OpenType 'name' table.
static int	otNameGetUtf32(Face face, OtNameId nameId, Language language, Out<int[]> text)	Fetches a font name from the OpenType 'name' table.
static int	otNameGetUtf8(Face face, OtNameId nameId, Language language, Out<String[]> text)	Fetches a font name from the OpenType 'name' table.
static OtNameEntry[]	otNameListNames(Face face)	Enumerates all available name IDs and language combinations.
static void	otShapeGlyphsClosure(Font font, Buffer buffer, Feature[] features, Set glyphs)	Computes the transitive closure of glyphs needed for a specified input buffer under the given font and feature list.
static void	otShapePlanCollectLookups(ShapePlan shapePlan, Tag tableTag, Set lookupIndexes)	Computes the complete set of GSUB or GPOS lookups that are applicable under a given shapePlan.
static Tag	otTagFromLanguage(Language language)	Deprecated. use hb_ot_tags_from_script_and_language() instead
static void	otTagsFromScript(Script script, Tag scriptTag1, Tag scriptTag2)	Deprecated. use hb_ot_tags_from_script_and_language() instead
static void	otTagsToScriptAndLanguage(Tag scriptTag, Tag languageTag, @Nullable Out<Script> script, @Nullable Language language)	Converts a script tag and a language tag to an hb_script_t and an hb_language_t.
static Language	otTagToLanguage(Tag tag)	Converts a language tag to an hb_language_t.
static Script	otTagToScript(Tag tag)	Converts a script tag to an hb_script_t.
static Bool	otVarFindAxis(Face face, Tag axisTag, MemorySegment axisIndex, OtVarAxis axisInfo)	Deprecated. use hb_ot_var_find_axis_info() instead
static Bool	otVarFindAxisInfo(Face face, Tag axisTag, OtVarAxisInfo axisInfo)	Fetches the variation-axis information corresponding to the specified axis tag in the specified face.
static int	otVarGetAxes(Face face, int startOffset, Out<OtVarAxis[]> axesArray)	Deprecated. use hb_ot_var_get_axis_infos() instead
static int	otVarGetAxisCount(Face face)	Fetches the number of OpenType variation axes included in the face.
static int	otVarGetAxisInfos(Face face, int startOffset, Out<OtVarAxisInfo[]> axesArray)	Fetches a list of all variation axes in the specified face.
static int	otVarGetNamedInstanceCount(Face face)	Fetches the number of named instances included in the face.
static Bool	otVarHasData(Face face)	Tests whether a face includes any OpenType variation data in the fvar table.
static int	otVarNamedInstanceGetDesignCoords(Face face, int instanceIndex, Out<float[]> coords)	Fetches the design-space coordinates corresponding to the given named instance in the face.
static OtNameId	otVarNamedInstanceGetPostscriptNameId(Face face, int instanceIndex)	Fetches the name table Name ID that provides display names for the "PostScript name" defined for the given named instance in the face.
static OtNameId	otVarNamedInstanceGetSubfamilyNameId(Face face, int instanceIndex)	Fetches the name table Name ID that provides display names for the "Subfamily name" defined for the given named instance in the face.
static void	otVarNormalizeCoords(Face face, int coordsLength, MemorySegment designCoords, Out<Integer> normalizedCoords)	Normalizes the given design-space coordinates.
static void	otVarNormalizeVariations(Face face, Variation variations, int variationsLength, Out<int[]> coords)	Normalizes all of the coordinates in the given list of variation axes.
static void	paintColor(PaintFuncs funcs, @Nullable MemorySegment paintData, Bool isForeground, Color color)	Perform a "color" paint operation.
static Bool	paintColorGlyph(PaintFuncs funcs, @Nullable MemorySegment paintData, Codepoint glyph, Font font)	Perform a "color-glyph" paint operation.
static Bool	paintCustomPaletteColor(PaintFuncs funcs, @Nullable MemorySegment paintData, int colorIndex, Color color)	Gets the custom palette color for colorIndex.
static PaintFuncs	paintFuncsCreate()	Creates a new hb_paint_funcs_t structure of paint functions.
static void	paintFuncsDestroy(PaintFuncs funcs)	Decreases the reference count on a paint-functions structure.
static PaintFuncs	paintFuncsGetEmpty()	Fetches the singleton empty paint-functions structure.
static MemorySegment	paintFuncsGetUserData(PaintFuncs funcs, UserDataKey key)	Fetches the user-data associated with the specified key, attached to the specified paint-functions structure.
static Bool	paintFuncsIsImmutable(PaintFuncs funcs)	Tests whether a paint-functions structure is immutable.
static void	paintFuncsMakeImmutable(PaintFuncs funcs)	Makes a paint-functions structure immutable.
static PaintFuncs	paintFuncsReference(PaintFuncs funcs)	Increases the reference count on a paint-functions structure.
static void	paintFuncsSetColorFunc(PaintFuncs funcs, PaintColorFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the paint-color callback on the paint functions struct.
static void	paintFuncsSetColorGlyphFunc(PaintFuncs funcs, PaintColorGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the color-glyph callback on the paint functions struct.
static void	paintFuncsSetCustomPaletteColorFunc(PaintFuncs funcs, PaintCustomPaletteColorFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the custom-palette-color callback on the paint functions struct.
static void	paintFuncsSetImageFunc(PaintFuncs funcs, PaintImageFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the paint-image callback on the paint functions struct.
static void	paintFuncsSetLinearGradientFunc(PaintFuncs funcs, PaintLinearGradientFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the linear-gradient callback on the paint functions struct.
static void	paintFuncsSetPopClipFunc(PaintFuncs funcs, PaintPopClipFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the pop-clip callback on the paint functions struct.
static void	paintFuncsSetPopGroupFunc(PaintFuncs funcs, PaintPopGroupFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the pop-group callback on the paint functions struct.
static void	paintFuncsSetPopTransformFunc(PaintFuncs funcs, PaintPopTransformFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the pop-transform callback on the paint functions struct.
static void	paintFuncsSetPushClipGlyphFunc(PaintFuncs funcs, PaintPushClipGlyphFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the push-clip-glyph callback on the paint functions struct.
static void	paintFuncsSetPushClipRectangleFunc(PaintFuncs funcs, PaintPushClipRectangleFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the push-clip-rect callback on the paint functions struct.
static void	paintFuncsSetPushGroupFunc(PaintFuncs funcs, PaintPushGroupFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the push-group callback on the paint functions struct.
static void	paintFuncsSetPushTransformFunc(PaintFuncs funcs, PaintPushTransformFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the push-transform callback on the paint functions struct.
static void	paintFuncsSetRadialGradientFunc(PaintFuncs funcs, PaintRadialGradientFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the radial-gradient callback on the paint functions struct.
static void	paintFuncsSetSweepGradientFunc(PaintFuncs funcs, PaintSweepGradientFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the sweep-gradient callback on the paint functions struct.
static Bool	paintFuncsSetUserData(PaintFuncs funcs, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified paint-functions structure.
static void	paintImage(PaintFuncs funcs, @Nullable MemorySegment paintData, Blob image, int width, int height, Tag format, float slant, @Nullable GlyphExtents extents)	Perform a "image" paint operation.
static void	paintLinearGradient(PaintFuncs funcs, @Nullable MemorySegment paintData, ColorLine colorLine, float x0, float y0, float x1, float y1, float x2, float y2)	Perform a "linear-gradient" paint operation.
static void	paintPopClip(PaintFuncs funcs, @Nullable MemorySegment paintData)	Perform a "pop-clip" paint operation.
static void	paintPopGroup(PaintFuncs funcs, @Nullable MemorySegment paintData, PaintCompositeMode mode)	Perform a "pop-group" paint operation.
static void	paintPopTransform(PaintFuncs funcs, @Nullable MemorySegment paintData)	Perform a "pop-transform" paint operation.
static void	paintPushClipGlyph(PaintFuncs funcs, @Nullable MemorySegment paintData, Codepoint glyph, Font font)	Perform a "push-clip-glyph" paint operation.
static void	paintPushClipRectangle(PaintFuncs funcs, @Nullable MemorySegment paintData, float xmin, float ymin, float xmax, float ymax)	Perform a "push-clip-rect" paint operation.
static void	paintPushGroup(PaintFuncs funcs, @Nullable MemorySegment paintData)	Perform a "push-group" paint operation.
static void	paintPushTransform(PaintFuncs funcs, @Nullable MemorySegment paintData, float xx, float yx, float xy, float yy, float dx, float dy)	Perform a "push-transform" paint operation.
static void	paintRadialGradient(PaintFuncs funcs, @Nullable MemorySegment paintData, ColorLine colorLine, float x0, float y0, float r0, float x1, float y1, float r1)	Perform a "radial-gradient" paint operation.
static void	paintSweepGradient(PaintFuncs funcs, @Nullable MemorySegment paintData, ColorLine colorLine, float x0, float y0, float startAngle, float endAngle)	Perform a "sweep-gradient" paint operation.
static Script	scriptFromIso15924Tag(Tag tag)	Converts an ISO 15924 script tag to a corresponding hb_script_t.
static Script	scriptFromString(byte[] str)	Converts a string str representing an ISO 15924 script tag to a corresponding hb_script_t.
static Direction	scriptGetHorizontalDirection(Script script)	Fetches the hb_direction_t of a script when it is set horizontally.
static Tag	scriptToIso15924Tag(Script script)	Converts an hb_script_t to a corresponding ISO 15924 script tag.
static Bool	segmentPropertiesEqual(SegmentProperties a, SegmentProperties b)	Checks the equality of two hb_segment_properties_t's.
static int	segmentPropertiesHash(SegmentProperties p)	Creates a hash representing p.
static void	segmentPropertiesOverlay(SegmentProperties p, SegmentProperties src)	Fills in missing fields of p from src in a considered manner.
static void	setAdd(Set set, Codepoint codepoint)	Adds codepoint to set.
static void	setAddRange(Set set, Codepoint first, Codepoint last)	Adds all of the elements from first to last (inclusive) to set.
static void	setAddSortedArray(Set set, Codepoint[] sortedCodepoints)	Adds numCodepoints codepoints to a set at once.
static Bool	setAllocationSuccessful(Set set)	Tests whether memory allocation for a set was successful.
static void	setClear(Set set)	Clears out the contents of a set.
static Set	setCopy(Set set)	Allocate a copy of set.
static Set	setCreate()	Creates a new, initially empty set.
static void	setDel(Set set, Codepoint codepoint)	Removes codepoint from set.
static void	setDelRange(Set set, Codepoint first, Codepoint last)	Removes all of the elements from first to last (inclusive) from set.
static void	setDestroy(Set set)	Decreases the reference count on a set.
static Set	setGetEmpty()	Fetches the singleton empty hb_set_t.
static Codepoint	setGetMax(Set set)	Finds the largest element in the set.
static Codepoint	setGetMin(Set set)	Finds the smallest element in the set.
static int	setGetPopulation(Set set)	Returns the number of elements in the set.
static MemorySegment	setGetUserData(Set set, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified set.
static Bool	setHas(Set set, Codepoint codepoint)	Tests whether codepoint belongs to set.
static int	setHash(Set set)	Creates a hash representing set.
static void	setIntersect(Set set, Set other)	Makes set the intersection of set and other.
static void	setInvert(Set set)	Inverts the contents of set.
static Bool	setIsEmpty(Set set)	Tests whether a set is empty (contains no elements).
static Bool	setIsEqual(Set set, Set other)	Tests whether set and other are equal (contain the same elements).
static Bool	setIsInverted(Set set)	Returns whether the set is inverted.
static Bool	setIsSubset(Set set, Set largerSet)	Tests whether set is a subset of largerSet.
static Bool	setNext(Set set, Codepoint codepoint)	Fetches the next element in set that is greater than current value of codepoint.
static int	setNextMany(Set set, Codepoint codepoint, Codepoint[] out)	Finds the next element in set that is greater than codepoint.
static Bool	setNextRange(Set set, Codepoint first, Codepoint last)	Fetches the next consecutive range of elements in set that are greater than current value of last.
static Bool	setPrevious(Set set, Codepoint codepoint)	Fetches the previous element in set that is lower than current value of codepoint.
static Bool	setPreviousRange(Set set, Codepoint first, Codepoint last)	Fetches the previous consecutive range of elements in set that are greater than current value of last.
static Set	setReference(Set set)	Increases the reference count on a set.
static void	setSet(Set set, Set other)	Makes the contents of set equal to the contents of other.
static Bool	setSetUserData(Set set, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified set.
static void	setSubtract(Set set, Set other)	Subtracts the contents of other from set.
static void	setSymmetricDifference(Set set, Set other)	Makes set the symmetric difference of set and other.
static void	setUnion(Set set, Set other)	Makes set the union of set and other.
static void	shape(Font font, Buffer buffer, @Nullable Feature[] features)	Shapes buffer using font turning its Unicode characters content to positioned glyphs.
static Bool	shapeFull(Font font, Buffer buffer, @Nullable Feature[] features, @Nullable String[] shaperList)	See hb_shape() for details.
static Bool	shapeJustify(Font font, Buffer buffer, @Nullable Feature[] features, @Nullable String[] shaperList, float minTargetAdvance, float maxTargetAdvance, Out<Float> advance, Tag varTag, Out<Float> varValue)	See hb_shape_full() for basic details.
static String[]	shapeListShapers()	Retrieves the list of shapers supported by HarfBuzz.
static ShapePlan	shapePlanCreate(Face face, SegmentProperties props, Feature[] userFeatures, String[] shaperList)	Constructs a shaping plan for a combination of face, userFeatures, props, and shaperList.
static ShapePlan	shapePlanCreate2(Face face, SegmentProperties props, Feature[] userFeatures, int[] coords, String[] shaperList)	The variable-font version of hb_shape_plan_create.
static ShapePlan	shapePlanCreateCached(Face face, SegmentProperties props, Feature[] userFeatures, String[] shaperList)	Creates a cached shaping plan suitable for reuse, for a combination of face, userFeatures, props, and shaperList.
static ShapePlan	shapePlanCreateCached2(Face face, SegmentProperties props, Feature[] userFeatures, int[] coords, String[] shaperList)	The variable-font version of hb_shape_plan_create_cached.
static void	shapePlanDestroy(ShapePlan shapePlan)	Decreases the reference count on the given shaping plan.
static Bool	shapePlanExecute(ShapePlan shapePlan, Font font, Buffer buffer, Feature[] features)	Executes the given shaping plan on the specified buffer, using the given font and features.
static ShapePlan	shapePlanGetEmpty()	Fetches the singleton empty shaping plan.
static String	shapePlanGetShaper(ShapePlan shapePlan)	Fetches the shaper from a given shaping plan.
static MemorySegment	shapePlanGetUserData(ShapePlan shapePlan, UserDataKey key)	Fetches the user data associated with the specified key, attached to the specified shaping plan.
static ShapePlan	shapePlanReference(ShapePlan shapePlan)	Increases the reference count on the given shaping plan.
static Bool	shapePlanSetUserData(ShapePlan shapePlan, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the given shaping plan.
static float	styleGetValue(Font font, StyleTag styleTag)	Searches variation axes of a hb_font_t object for a specific axis first, if not set, then tries to get default style values from different tables of the font.
static Tag	tagFromString(byte[] str)	Converts a string into an hb_tag_t.
static void	tagToString(Tag tag, Out<byte[]> buf)	Converts an hb_tag_t to a string and returns it in buf.
static UnicodeCombiningClass	unicodeCombiningClass(UnicodeFuncs ufuncs, Codepoint unicode)	Retrieves the Canonical Combining Class (ccc) property of code point unicode.
static Bool	unicodeCompose(UnicodeFuncs ufuncs, Codepoint a, Codepoint b, Codepoint ab)	Fetches the composition of a sequence of two Unicode code points.
static Bool	unicodeDecompose(UnicodeFuncs ufuncs, Codepoint ab, Codepoint a, Codepoint b)	Fetches the decomposition of a Unicode code point.
static int	unicodeDecomposeCompatibility(UnicodeFuncs ufuncs, Codepoint u, Codepoint decomposed)	Deprecated.
static int	unicodeEastasianWidth(UnicodeFuncs ufuncs, Codepoint unicode)	Deprecated.
static UnicodeFuncs	unicodeFuncsCreate(@Nullable UnicodeFuncs parent)	Creates a new hb_unicode_funcs_t structure of Unicode functions.
static void	unicodeFuncsDestroy(UnicodeFuncs ufuncs)	Decreases the reference count on a Unicode-functions structure.
static UnicodeFuncs	unicodeFuncsGetDefault()	Fetches a pointer to the default Unicode-functions structure that is used when no functions are explicitly set on hb_buffer_t.
static UnicodeFuncs	unicodeFuncsGetEmpty()	Fetches the singleton empty Unicode-functions structure.
static UnicodeFuncs	unicodeFuncsGetParent(UnicodeFuncs ufuncs)	Fetches the parent of the Unicode-functions structure ufuncs.
static MemorySegment	unicodeFuncsGetUserData(UnicodeFuncs ufuncs, UserDataKey key)	Fetches the user-data associated with the specified key, attached to the specified Unicode-functions structure.
static Bool	unicodeFuncsIsImmutable(UnicodeFuncs ufuncs)	Tests whether the specified Unicode-functions structure is immutable.
static void	unicodeFuncsMakeImmutable(UnicodeFuncs ufuncs)	Makes the specified Unicode-functions structure immutable.
static UnicodeFuncs	unicodeFuncsReference(UnicodeFuncs ufuncs)	Increases the reference count on a Unicode-functions structure.
static void	unicodeFuncsSetCombiningClassFunc(UnicodeFuncs ufuncs, UnicodeCombiningClassFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_combining_class_func_t.
static void	unicodeFuncsSetComposeFunc(UnicodeFuncs ufuncs, UnicodeComposeFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_compose_func_t.
static void	unicodeFuncsSetDecomposeCompatibilityFunc(UnicodeFuncs ufuncs, UnicodeDecomposeCompatibilityFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Deprecated.
static void	unicodeFuncsSetDecomposeFunc(UnicodeFuncs ufuncs, UnicodeDecomposeFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_decompose_func_t.
static void	unicodeFuncsSetEastasianWidthFunc(UnicodeFuncs ufuncs, UnicodeEastasianWidthFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Deprecated.
static void	unicodeFuncsSetGeneralCategoryFunc(UnicodeFuncs ufuncs, UnicodeGeneralCategoryFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_general_category_func_t.
static void	unicodeFuncsSetMirroringFunc(UnicodeFuncs ufuncs, UnicodeMirroringFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_mirroring_func_t.
static void	unicodeFuncsSetScriptFunc(UnicodeFuncs ufuncs, UnicodeScriptFunc func, @Nullable MemorySegment userData, @Nullable DestroyFunc destroy)	Sets the implementation function for hb_unicode_script_func_t.
static Bool	unicodeFuncsSetUserData(UnicodeFuncs ufuncs, UserDataKey key, @Nullable MemorySegment data, @Nullable DestroyFunc destroy, Bool replace)	Attaches a user-data key/data pair to the specified Unicode-functions structure.
static UnicodeGeneralCategory	unicodeGeneralCategory(UnicodeFuncs ufuncs, Codepoint unicode)	Retrieves the General Category (gc) property of code point unicode.
static Codepoint	unicodeMirroring(UnicodeFuncs ufuncs, Codepoint unicode)	Retrieves the Bi-directional Mirroring Glyph code point defined for code point unicode.
static Script	unicodeScript(UnicodeFuncs ufuncs, Codepoint unicode)	Retrieves the hb_script_t script to which code point unicode belongs.
static Bool	variationFromString(byte[] str, Variation variation)	Parses a string into a hb_variation_t.
static void	variationToString(Variation variation, Out<String[]> buf)	Converts an hb_variation_t into a NULL-terminated string in the format understood by hb_variation_from_string().

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

AAT_LAYOUT_NO_SELECTOR_INDEX

public static final int AAT_LAYOUT_NO_SELECTOR_INDEX

Used when getting or setting AAT feature selectors. Indicates that there is no selector index corresponding to the selector of interest.

See Also:

• Constant Field Values

BUFFER_REPLACEMENT_CODEPOINT_DEFAULT

public static final int BUFFER_REPLACEMENT_CODEPOINT_DEFAULT

The default code point for replacing invalid characters in a given encoding. Set to U+FFFD REPLACEMENT CHARACTER.

See Also:

• Constant Field Values

CODEPOINT_INVALID

public static final Codepoint CODEPOINT_INVALID

Unused hb_codepoint_t value.

FEATURE_GLOBAL_START

public static final int FEATURE_GLOBAL_START

Special setting for hb_feature_t.start to apply the feature from the start of the buffer.

See Also:

• Constant Field Values

FONT_NO_VAR_NAMED_INSTANCE

public static final int FONT_NO_VAR_NAMED_INSTANCE

Constant signifying that a font does not have any named-instance index set. This is the default of a font.

See Also:

• Constant Field Values

OT_LAYOUT_DEFAULT_LANGUAGE_INDEX

public static final int OT_LAYOUT_DEFAULT_LANGUAGE_INDEX

Special value for language index indicating default or unsupported language.

See Also:

• Constant Field Values

OT_LAYOUT_NO_FEATURE_INDEX

public static final int OT_LAYOUT_NO_FEATURE_INDEX

Special value for feature index indicating unsupported feature.

See Also:

• Constant Field Values

OT_LAYOUT_NO_SCRIPT_INDEX

public static final int OT_LAYOUT_NO_SCRIPT_INDEX

Special value for script index indicating unsupported script.

See Also:

• Constant Field Values

OT_LAYOUT_NO_VARIATIONS_INDEX

public static final int OT_LAYOUT_NO_VARIATIONS_INDEX

Special value for variations index indicating unsupported variation.

See Also:

• Constant Field Values

OT_MAX_TAGS_PER_LANGUAGE

public static final int OT_MAX_TAGS_PER_LANGUAGE

Maximum number of OpenType tags that can correspond to a give hb_language_t.

See Also:

• Constant Field Values

OT_MAX_TAGS_PER_SCRIPT

public static final int OT_MAX_TAGS_PER_SCRIPT

Maximum number of OpenType tags that can correspond to a give hb_script_t.

See Also:

• Constant Field Values

OT_VAR_NO_AXIS_INDEX

public static final int OT_VAR_NO_AXIS_INDEX

Do not use.

See Also:

• Constant Field Values

UNICODE_COMBINING_CLASS_CCC133

public static final int UNICODE_COMBINING_CLASS_CCC133

[Tibetan]

See Also:

• Constant Field Values

UNICODE_MAX

public static final int UNICODE_MAX

Maximum valid Unicode code point.

See Also:

• Constant Field Values

UNICODE_MAX_DECOMPOSITION_LEN

public static final int UNICODE_MAX_DECOMPOSITION_LEN

See Unicode 6.1 for details on the maximum decomposition length.

See Also:

• Constant Field Values

VERSION_MAJOR

public static final int VERSION_MAJOR

See Also:

• Constant Field Values

VERSION_MICRO

public static final int VERSION_MICRO

See Also:

• Constant Field Values

VERSION_MINOR

public static final int VERSION_MINOR

See Also:

• Constant Field Values

VERSION_STRING

public static final String VERSION_STRING

See Also:

• Constant Field Values

Constructor Details

HarfBuzz

public HarfBuzz()

Method Details

javagi$ensureInitialized

public static void javagi$ensureInitialized()

aatLayoutFeatureTypeGetNameId

public static OtNameId aatLayoutFeatureTypeGetNameId(Face face,
 AatLayoutFeatureType featureType)

Fetches the name identifier of the specified feature type in the face's name table.

Parameters:

face - hb_face_t to work upon

featureType - The hb_aat_layout_feature_type_t of the requested feature type

Returns:

Name identifier of the requested feature type

aatLayoutFeatureTypeGetSelectorInfos

public static int aatLayoutFeatureTypeGetSelectorInfos(Face face,
 AatLayoutFeatureType featureType,
 int startOffset,
 @Nullable
 @Nullable Out<AatLayoutFeatureSelectorInfo[]> selectors,
 @Nullable
 @Nullable Out<Integer> defaultIndex)

Fetches a list of the selectors available for the specified feature in the given face.

If upon return, defaultIndex is set to HB_AAT_LAYOUT_NO_SELECTOR_INDEX, then the feature type is non-exclusive. Otherwise, defaultIndex is the index of the selector that is selected by default.

Parameters:

face - hb_face_t to work upon

featureType - The hb_aat_layout_feature_type_t of the requested feature type

startOffset - offset of the first feature type to retrieve

selectors - A buffer pointer. The selectors available for the feature type queries.

defaultIndex - The index of the feature's default selector, if any

Returns:

Number of all available feature selectors

aatLayoutGetFeatureTypes

public static int aatLayoutGetFeatureTypes(Face face,
 int startOffset,
 Out<AatLayoutFeatureType[]> features)

Fetches a list of the AAT feature types included in the specified face.

Parameters:

face - hb_face_t to work upon

startOffset - offset of the first feature type to retrieve

features - Array of feature types found

Returns:

Number of all available feature types.

aatLayoutHasPositioning

public static Bool aatLayoutHasPositioning(Face face)

Tests whether the specified face includes any positioning information in the kerx table.

<note>Note: does not examine the GPOS table.</note>

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

aatLayoutHasSubstitution

public static Bool aatLayoutHasSubstitution(Face face)

Tests whether the specified face includes any substitutions in the morx or mort tables.

<note>Note: does not examine the GSUB table.</note>

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

aatLayoutHasTracking

public static Bool aatLayoutHasTracking(Face face)

Tests whether the specified face includes any tracking information in the trak table.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

blobCopyWritableOrFail

public static Blob blobCopyWritableOrFail(Blob blob)

Makes a writable copy of blob.

Parameters:

blob - A blob.

Returns:

The new blob, or nullptr if allocation failed

blobCreate

public static Blob blobCreate(String data,
 int length,
 MemoryMode mode,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Creates a new "blob" object wrapping data. The mode parameter is used to negotiate ownership and lifecycle of data.

Parameters:

data - Pointer to blob data.

length - Length of data in bytes.

mode - Memory mode for data.

userData - Data parameter to pass to destroy.

destroy - Callback to call when data is not needed anymore.

Returns:

New blob, or the empty blob if something failed or if length is zero. Destroy with hb_blob_destroy().

blobCreateFromFile

public static Blob blobCreateFromFile(String fileName)

Creates a new blob containing the data from the specified binary font file.

The filename is passed directly to the system on all platforms, except on Windows, where the filename is interpreted as UTF-8. Only if the filename is not valid UTF-8, it will be interpreted according to the system codepage.

Parameters:

fileName - A font filename

Returns:

An hb_blob_t pointer with the content of the file, or hb_blob_get_empty() if failed.

blobCreateFromFileOrFail

public static Blob blobCreateFromFileOrFail(String fileName)

Creates a new blob containing the data from the specified binary font file.

The filename is passed directly to the system on all platforms, except on Windows, where the filename is interpreted as UTF-8. Only if the filename is not valid UTF-8, it will be interpreted according to the system codepage.

Parameters:

fileName - A font filename

Returns:

An hb_blob_t pointer with the content of the file, or NULL if failed.

blobCreateOrFail

public static Blob blobCreateOrFail(String data,
 int length,
 MemoryMode mode,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Creates a new "blob" object wrapping data. The mode parameter is used to negotiate ownership and lifecycle of data.

Note that this function returns a freshly-allocated empty blob even if length is zero. This is in contrast to hb_blob_create(), which returns the singleton empty blob (as returned by hb_blob_get_empty()) if length is zero.

Parameters:

data - Pointer to blob data.

length - Length of data in bytes.

mode - Memory mode for data.

userData - Data parameter to pass to destroy.

destroy - Callback to call when data is not needed anymore.

Returns:

New blob, or NULL if failed. Destroy with hb_blob_destroy().

blobCreateSubBlob

public static Blob blobCreateSubBlob(Blob parent,
 int offset,
 int length)

Returns a blob that represents a range of bytes in parent. The new blob is always created with HB_MEMORY_MODE_READONLY, meaning that it will never modify data in the parent blob. The parent data is not expected to be modified, and will result in undefined behavior if it is.

Makes parent immutable.

Parameters:

parent - Parent blob.

offset - Start offset of sub-blob within parent, in bytes.

length - Length of sub-blob.

Returns:

New blob, or the empty blob if something failed or if length is zero or offset is beyond the end of parent's data. Destroy with hb_blob_destroy().

blobDestroy

public static void blobDestroy(Blob blob)

Decreases the reference count on blob, and if it reaches zero, destroys blob, freeing all memory, possibly calling the destroy-callback the blob was created for if it has not been called already.

See TODO:link object types for more information.

Parameters:

blob - a blob.

blobGetData

public static String[] blobGetData(Blob blob)

Fetches the data from a blob.

Parameters:

blob - a blob.

Returns:

the byte data of blob.

blobGetDataWritable

public static String[] blobGetDataWritable(Blob blob)

Tries to make blob data writable (possibly copying it) and return pointer to data.

Fails if blob has been made immutable, or if memory allocation fails.

Parameters:

blob - a blob.

Returns:

Writable blob data, or NULL if failed.

blobGetEmpty

public static Blob blobGetEmpty()

Returns the singleton empty blob.

See TODO:link object types for more information.

Returns:

The empty blob.

blobGetLength

public static int blobGetLength(Blob blob)

Fetches the length of a blob's data.

Parameters:

blob - a blob.

Returns:

the length of blob data in bytes.

blobGetUserData

public static MemorySegment blobGetUserData(Blob blob,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified font-functions structure.

Parameters:

blob - a blob

key - The user-data key to query

Returns:

A pointer to the user data

blobIsImmutable

public static Bool blobIsImmutable(Blob blob)

Tests whether a blob is immutable.

Parameters:

blob - a blob.

Returns:

true if blob is immutable, false otherwise

blobMakeImmutable

public static void blobMakeImmutable(Blob blob)

Makes a blob immutable.

Parameters:

blob - a blob

blobReference

public static Blob blobReference(Blob blob)

Increases the reference count on blob.

See TODO:link object types for more information.

Parameters:

blob - a blob.

Returns:

blob.

blobSetUserData

public static Bool blobSetUserData(Blob blob,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified blob.

Parameters:

blob - An hb_blob_t

key - The user-data key to set

data - A pointer to the user data to set

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

bufferAdd

public static void bufferAdd(Buffer buffer,
 Codepoint codepoint,
 int cluster)

Appends a character with the Unicode value of codepoint to buffer, and gives it the initial cluster value of cluster. Clusters can be any thing the client wants, they are usually used to refer to the index of the character in the input text stream and are output in hb_glyph_info_t.cluster field.

This function does not check the validity of codepoint, it is up to the caller to ensure it is a valid Unicode code point.

Parameters:

buffer - An hb_buffer_t

codepoint - A Unicode code point.

cluster - The cluster value of codepoint.

bufferAddCodepoints

public static void bufferAddCodepoints(Buffer buffer,
 Codepoint[] text,
 int itemOffset,
 int itemLength)

Appends characters from text array to buffer. The itemOffset is the position of the first character from text that will be appended, and itemLength is the number of character. When shaping part of a larger text (e.g. a run of text from a paragraph), instead of passing just the substring corresponding to the run, it is preferable to pass the whole paragraph and specify the run start and length as itemOffset and itemLength, respectively, to give HarfBuzz the full context to be able, for example, to do cross-run Arabic shaping or properly handle combining marks at stat of run.

This function does not check the validity of text, it is up to the caller to ensure it contains a valid Unicode scalar values. In contrast, hb_buffer_add_utf32() can be used that takes similar input but performs sanity-check on the input.

Parameters:

buffer - a hb_buffer_t to append characters to.

text - an array of Unicode code points to append.

itemOffset - the offset of the first code point to add to the buffer.

itemLength - the number of code points to add to the buffer, or -1 for the end of text (assuming it is NULL terminated).

bufferAddLatin1

public static void bufferAddLatin1(Buffer buffer,
 byte[] text,
 int itemOffset,
 int itemLength)

Similar to hb_buffer_add_codepoints(), but allows only access to first 256 Unicode code points that can fit in 8-bit strings.

<note>Has nothing to do with non-Unicode Latin-1 encoding.</note>

Parameters:

buffer - An hb_buffer_t

text - an array of UTF-8 characters to append

itemOffset - the offset of the first character to add to the buffer

itemLength - the number of characters to add to the buffer, or -1 for the end of text (assuming it is NULL terminated)

bufferAddUtf16

public static void bufferAddUtf16(Buffer buffer,
 short[] text,
 int itemOffset,
 int itemLength)

See hb_buffer_add_codepoints().

Replaces invalid UTF-16 characters with the buffer replacement code point, see hb_buffer_set_replacement_codepoint().

Parameters:

buffer - An hb_buffer_t

text - An array of UTF-16 characters to append

itemOffset - The offset of the first character to add to the buffer

itemLength - The number of characters to add to the buffer, or -1 for the end of text (assuming it is NULL terminated)

bufferAddUtf32

public static void bufferAddUtf32(Buffer buffer,
 int[] text,
 int itemOffset,
 int itemLength)

See hb_buffer_add_codepoints().

Replaces invalid UTF-32 characters with the buffer replacement code point, see hb_buffer_set_replacement_codepoint().

Parameters:

buffer - An hb_buffer_t

text - An array of UTF-32 characters to append

itemOffset - The offset of the first character to add to the buffer

itemLength - The number of characters to add to the buffer, or -1 for the end of text (assuming it is NULL terminated)

bufferAddUtf8

public static void bufferAddUtf8(Buffer buffer,
 byte[] text,
 int itemOffset,
 int itemLength)

See hb_buffer_add_codepoints().

Replaces invalid UTF-8 characters with the buffer replacement code point, see hb_buffer_set_replacement_codepoint().

Parameters:

buffer - An hb_buffer_t

text - An array of UTF-8 characters to append.

itemOffset - The offset of the first character to add to the buffer.

itemLength - The number of characters to add to the buffer, or -1 for the end of text (assuming it is NULL terminated).

bufferAllocationSuccessful

public static Bool bufferAllocationSuccessful(Buffer buffer)

Check if allocating memory for the buffer succeeded.

Parameters:

buffer - An hb_buffer_t

Returns:

true if buffer memory allocation succeeded, false otherwise.

bufferAppend

public static void bufferAppend(Buffer buffer,
 Buffer source,
 int start,
 int end)

Append (part of) contents of another buffer to this buffer.

Parameters:

buffer - An hb_buffer_t

source - source hb_buffer_t

start - start index into source buffer to copy. Use 0 to copy from start of buffer.

end - end index into source buffer to copy. Use HBFEATUREGLOBALEND to copy to end of buffer.

bufferClearContents

public static void bufferClearContents(Buffer buffer)

Similar to hb_buffer_reset(), but does not clear the Unicode functions and the replacement code point.

Parameters:

buffer - An hb_buffer_t

bufferCreate

public static Buffer bufferCreate()

Creates a new hb_buffer_t with all properties to defaults.

Returns:

A newly allocated hb_buffer_t with a reference count of 1. The initial reference count should be released with hb_buffer_destroy() when you are done using the hb_buffer_t. This function never returns NULL. If memory cannot be allocated, a special hb_buffer_t object will be returned on which hb_buffer_allocation_successful() returns false.

bufferCreateSimilar

public static Buffer bufferCreateSimilar(Buffer src)

Creates a new hb_buffer_t, similar to hb_buffer_create(). The only difference is that the buffer is configured similarly to src.

Parameters:

src - An hb_buffer_t

Returns:

A newly allocated hb_buffer_t, similar to hb_buffer_create().

bufferDeserializeGlyphs

public static Bool bufferDeserializeGlyphs(Buffer buffer,
 String[] buf,
 @Nullable
 @Nullable Out<String> endPtr,
 @Nullable
 @Nullable Font font,
 BufferSerializeFormat format)

Deserializes glyphs buffer from textual representation in the format produced by hb_buffer_serialize_glyphs().

Parameters:

buffer - an hb_buffer_t buffer.

buf - string to deserialize

endPtr - output pointer to the character after last consumed one.

font - font for getting glyph IDs

format - the hb_buffer_serialize_format_t of the input buf

Returns:

true if parse was successful, false if an error occurred.

bufferDeserializeUnicode

public static Bool bufferDeserializeUnicode(Buffer buffer,
 String[] buf,
 @Nullable
 @Nullable Out<String> endPtr,
 BufferSerializeFormat format)

Deserializes Unicode buffer from textual representation in the format produced by hb_buffer_serialize_unicode().

Parameters:

buffer - an hb_buffer_t buffer.

buf - string to deserialize

endPtr - output pointer to the character after last consumed one.

format - the hb_buffer_serialize_format_t of the input buf

Returns:

true if parse was successful, false if an error occurred.

bufferDestroy

public static void bufferDestroy(Buffer buffer)

Deallocate the buffer. Decreases the reference count on buffer by one. If the result is zero, then buffer and all associated resources are freed. See hb_buffer_reference().

Parameters:

buffer - An hb_buffer_t

bufferDiff

public static Set<BufferDiffFlags> bufferDiff(Buffer buffer,
 Buffer reference,
 Codepoint dottedcircleGlyph,
 int positionFuzz)

If dottedcircle_glyph is (hb_codepoint_t) -1 then HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT and HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT are never returned. This should be used by most callers if just comparing two buffers is needed.

Parameters:

buffer - a buffer.

reference - other buffer to compare to.

dottedcircleGlyph - glyph id of U+25CC DOTTED CIRCLE, or (hb_codepoint_t) -1.

positionFuzz - allowed absolute difference in position values.

bufferGetClusterLevel

public static BufferClusterLevel bufferGetClusterLevel(Buffer buffer)

Fetches the cluster level of a buffer. The hb_buffer_cluster_level_t dictates one aspect of how HarfBuzz will treat non-base characters during shaping.

Parameters:

buffer - An hb_buffer_t

Returns:

The cluster level of buffer

bufferGetContentType

public static BufferContentType bufferGetContentType(Buffer buffer)

Fetches the type of buffer contents. Buffers are either empty, contain characters (before shaping), or contain glyphs (the result of shaping).

Parameters:

buffer - An hb_buffer_t

Returns:

The type of buffer contents

bufferGetDirection

public static Direction bufferGetDirection(Buffer buffer)

See hb_buffer_set_direction()

Parameters:

buffer - An hb_buffer_t

Returns:

The direction of the buffer.

bufferGetEmpty

public static Buffer bufferGetEmpty()

Fetches an empty hb_buffer_t.

Returns:

The empty buffer

bufferGetFlags

public static Set<BufferFlags> bufferGetFlags(Buffer buffer)

Fetches the hb_buffer_flags_t of buffer.

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer flags

bufferGetGlyphInfos

public static GlyphInfo[] bufferGetGlyphInfos(Buffer buffer)

Returns buffer glyph information array. Returned pointer is valid as long as buffer contents are not modified.

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer glyph information array. The value valid as long as buffer has not been modified.

bufferGetGlyphPositions

public static GlyphPosition[] bufferGetGlyphPositions(Buffer buffer)

Returns buffer glyph position array. Returned pointer is valid as long as buffer contents are not modified.

If buffer did not have positions before, the positions will be initialized to zeros, unless this function is called from within a buffer message callback (see hb_buffer_set_message_func()), in which case NULL is returned.

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer glyph position array. The value valid as long as buffer has not been modified.

bufferGetInvisibleGlyph

public static Codepoint bufferGetInvisibleGlyph(Buffer buffer)

See hb_buffer_set_invisible_glyph().

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer invisible hb_codepoint_t

bufferGetLanguage

public static Language bufferGetLanguage(Buffer buffer)

See hb_buffer_set_language().

Parameters:

buffer - An hb_buffer_t

Returns:

The hb_language_t of the buffer. Must not be freed by the caller.

bufferGetLength

public static int bufferGetLength(Buffer buffer)

Returns the number of items in the buffer.

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer length. The value valid as long as buffer has not been modified.

bufferGetNotFoundGlyph

public static Codepoint bufferGetNotFoundGlyph(Buffer buffer)

See hb_buffer_set_not_found_glyph().

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer not-found hb_codepoint_t

bufferGetRandomState

public static int bufferGetRandomState(Buffer buffer)

See hb_buffer_set_random_state().

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer random state

bufferGetReplacementCodepoint

public static Codepoint bufferGetReplacementCodepoint(Buffer buffer)

Fetches the hb_codepoint_t that replaces invalid entries for a given encoding when adding text to buffer.

Parameters:

buffer - An hb_buffer_t

Returns:

The buffer replacement hb_codepoint_t

bufferGetScript

public static Script bufferGetScript(Buffer buffer)

Fetches the script of buffer.

Parameters:

buffer - An hb_buffer_t

Returns:

The hb_script_t of the buffer

bufferGetSegmentProperties

public static void bufferGetSegmentProperties(Buffer buffer,
 SegmentProperties props)

Sets props to the hb_segment_properties_t of buffer.

Parameters:

buffer - An hb_buffer_t

props - The output hb_segment_properties_t

bufferGetUnicodeFuncs

public static UnicodeFuncs bufferGetUnicodeFuncs(Buffer buffer)

Fetches the Unicode-functions structure of a buffer.

Parameters:

buffer - An hb_buffer_t

Returns:

The Unicode-functions structure

bufferGetUserData

public static MemorySegment bufferGetUserData(Buffer buffer,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified buffer.

Parameters:

buffer - An hb_buffer_t

key - The user-data key to query

Returns:

A pointer to the user data

bufferGuessSegmentProperties

public static void bufferGuessSegmentProperties(Buffer buffer)

Sets unset buffer segment properties based on buffer Unicode contents. If buffer is not empty, it must have content type HB_BUFFER_CONTENT_TYPE_UNICODE.

If buffer script is not set (ie. is HB_SCRIPT_INVALID), it will be set to the Unicode script of the first character in the buffer that has a script other than HB_SCRIPT_COMMON, HB_SCRIPT_INHERITED, and HB_SCRIPT_UNKNOWN.

Next, if buffer direction is not set (ie. is HB_DIRECTION_INVALID), it will be set to the natural horizontal direction of the buffer script as returned by hb_script_get_horizontal_direction(). If hb_script_get_horizontal_direction() returns HB_DIRECTION_INVALID, then HB_DIRECTION_LTR is used.

Finally, if buffer language is not set (ie. is HB_LANGUAGE_INVALID), it will be set to the process's default language as returned by hb_language_get_default(). This may change in the future by taking buffer script into consideration when choosing a language. Note that hb_language_get_default() is NOT threadsafe the first time it is called. See documentation for that function for details.

Parameters:

buffer - An hb_buffer_t

bufferHasPositions

public static Bool bufferHasPositions(Buffer buffer)

Returns whether buffer has glyph position data. A buffer gains position data when hb_buffer_get_glyph_positions() is called on it, and cleared of position data when hb_buffer_clear_contents() is called.

Parameters:

buffer - an hb_buffer_t.

Returns:

true if the buffer has position array, false otherwise.

bufferNormalizeGlyphs

public static void bufferNormalizeGlyphs(Buffer buffer)

Reorders a glyph buffer to have canonical in-cluster glyph order / position. The resulting clusters should behave identical to pre-reordering clusters.

<note>This has nothing to do with Unicode normalization.</note>

Parameters:

buffer - An hb_buffer_t

bufferPreAllocate

public static Bool bufferPreAllocate(Buffer buffer,
 int size)

Pre allocates memory for buffer to fit at least size number of items.

Parameters:

buffer - An hb_buffer_t

size - Number of items to pre allocate.

Returns:

true if buffer memory allocation succeeded, false otherwise

bufferReference

public static Buffer bufferReference(Buffer buffer)

Increases the reference count on buffer by one. This prevents buffer from being destroyed until a matching call to hb_buffer_destroy() is made.

Parameters:

buffer - An hb_buffer_t

Returns:

The referenced hb_buffer_t.

bufferReset

public static void bufferReset(Buffer buffer)

Resets the buffer to its initial status, as if it was just newly created with hb_buffer_create().

Parameters:

buffer - An hb_buffer_t

bufferReverse

public static void bufferReverse(Buffer buffer)

Reverses buffer contents.

Parameters:

buffer - An hb_buffer_t

bufferReverseClusters

public static void bufferReverseClusters(Buffer buffer)

Reverses buffer clusters. That is, the buffer contents are reversed, then each cluster (consecutive items having the same cluster number) are reversed again.

Parameters:

buffer - An hb_buffer_t

bufferReverseRange

public static void bufferReverseRange(Buffer buffer,
 int start,
 int end)

Reverses buffer contents between start and end.

Parameters:

buffer - An hb_buffer_t

start - start index

end - end index

bufferSerialize

public static int bufferSerialize(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 @Nullable
 @Nullable Font font,
 BufferSerializeFormat format,
 Set<BufferSerializeFlags> flags)

Serializes buffer into a textual representation of its content, whether Unicode codepoints or glyph identifiers and positioning information. This is useful for showing the contents of the buffer, for example during debugging. See the documentation of hb_buffer_serialize_unicode() and hb_buffer_serialize_glyphs() for a description of the output format.

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

font - the hb_font_t used to shape this buffer, needed to read glyph names and extents. If NULL, an empty font will be used.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSerialize

public static int bufferSerialize(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 @Nullable
 @Nullable Font font,
 BufferSerializeFormat format,
 BufferSerializeFlags... flags)

Serializes buffer into a textual representation of its content, whether Unicode codepoints or glyph identifiers and positioning information. This is useful for showing the contents of the buffer, for example during debugging. See the documentation of hb_buffer_serialize_unicode() and hb_buffer_serialize_glyphs() for a description of the output format.

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

font - the hb_font_t used to shape this buffer, needed to read glyph names and extents. If NULL, an empty font will be used.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSerializeFormatFromString

public static BufferSerializeFormat bufferSerializeFormatFromString(byte[] str)

Parses a string into an hb_buffer_serialize_format_t. Does not check if str is a valid buffer serialization format, use hb_buffer_serialize_list_formats() to get the list of supported formats.

Parameters:

str - a string to parse

Returns:

The parsed hb_buffer_serialize_format_t.

bufferSerializeFormatToString

public static String bufferSerializeFormatToString(BufferSerializeFormat format)

Converts format to the string corresponding it, or NULL if it is not a valid hb_buffer_serialize_format_t.

Parameters:

format - an hb_buffer_serialize_format_t to convert.

Returns:

A NULL terminated string corresponding to format. Should not be freed.

bufferSerializeGlyphs

public static int bufferSerializeGlyphs(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 @Nullable
 @Nullable Font font,
 BufferSerializeFormat format,
 Set<BufferSerializeFlags> flags)

Serializes buffer into a textual representation of its glyph content, useful for showing the contents of the buffer, for example during debugging. There are currently two supported serialization formats:

text
A human-readable, plain text format. The serialized glyphs will look something like:

 [uni0651=0@518,0+0|uni0628=0+1897]
 

• The serialized glyphs are delimited with [ and ].
• Glyphs are separated with |
• Each glyph starts with glyph name, or glyph index if HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set. Then,
• If HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, = then hb_glyph_info_t.cluster.
• If HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set, the hb_glyph_position_t in the format:
• If both hb_glyph_position_t.x_offset and hb_glyph_position_t.y_offset are not 0, @x_offset,y_offset. Then,
• +x_advance, then ,y_advance if hb_glyph_position_t.y_advance is not 0. Then,
• If HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set, the hb_glyph_extents_t in the format <x_bearing,y_bearing,width,height>

json
A machine-readable, structured format. The serialized glyphs will look something like:

 [{"g":"uni0651","cl":0,"dx":518,"dy":0,"ax":0,"ay":0},
 {"g":"uni0628","cl":0,"dx":0,"dy":0,"ax":1897,"ay":0}]
 

Each glyph is a JSON object, with the following properties:

• g: the glyph name or glyph index if HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set.
• cl: hb_glyph_info_t.cluster if HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
• dx,dy,ax,ay: hb_glyph_position_t.x_offset, hb_glyph_position_t.y_offset, hb_glyph_position_t.x_advance and hb_glyph_position_t.y_advance respectively, if HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set.
• xb,yb,w,h: hb_glyph_extents_t.x_bearing, hb_glyph_extents_t.y_bearing, hb_glyph_extents_t.width and hb_glyph_extents_t.height respectively if HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set.

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

font - the hb_font_t used to shape this buffer, needed to read glyph names and extents. If NULL, an empty font will be used.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSerializeGlyphs

public static int bufferSerializeGlyphs(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 @Nullable
 @Nullable Font font,
 BufferSerializeFormat format,
 BufferSerializeFlags... flags)

Serializes buffer into a textual representation of its glyph content, useful for showing the contents of the buffer, for example during debugging. There are currently two supported serialization formats:

text
A human-readable, plain text format. The serialized glyphs will look something like:

 [uni0651=0@518,0+0|uni0628=0+1897]
 

• The serialized glyphs are delimited with [ and ].
• Glyphs are separated with |
• Each glyph starts with glyph name, or glyph index if HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set. Then,
• If HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, = then hb_glyph_info_t.cluster.
• If HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set, the hb_glyph_position_t in the format:
• If both hb_glyph_position_t.x_offset and hb_glyph_position_t.y_offset are not 0, @x_offset,y_offset. Then,
• +x_advance, then ,y_advance if hb_glyph_position_t.y_advance is not 0. Then,
• If HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set, the hb_glyph_extents_t in the format <x_bearing,y_bearing,width,height>

json
A machine-readable, structured format. The serialized glyphs will look something like:

 [{"g":"uni0651","cl":0,"dx":518,"dy":0,"ax":0,"ay":0},
 {"g":"uni0628","cl":0,"dx":0,"dy":0,"ax":1897,"ay":0}]
 

Each glyph is a JSON object, with the following properties:

• g: the glyph name or glyph index if HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set.
• cl: hb_glyph_info_t.cluster if HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
• dx,dy,ax,ay: hb_glyph_position_t.x_offset, hb_glyph_position_t.y_offset, hb_glyph_position_t.x_advance and hb_glyph_position_t.y_advance respectively, if HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set.
• xb,yb,w,h: hb_glyph_extents_t.x_bearing, hb_glyph_extents_t.y_bearing, hb_glyph_extents_t.width and hb_glyph_extents_t.height respectively if HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set.

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

font - the hb_font_t used to shape this buffer, needed to read glyph names and extents. If NULL, an empty font will be used.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSerializeListFormats

public static String[] bufferSerializeListFormats()

Returns a list of supported buffer serialization formats.

Returns:

A string array of buffer serialization formats. Should not be freed.

bufferSerializeUnicode

public static int bufferSerializeUnicode(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 BufferSerializeFormat format,
 Set<BufferSerializeFlags> flags)

Serializes buffer into a textual representation of its content, when the buffer contains Unicode codepoints (i.e., before shaping). This is useful for showing the contents of the buffer, for example during debugging. There are currently two supported serialization formats:

text
A human-readable, plain text format. The serialized codepoints will look something like:

  <U+0651=0|U+0628=1>
 

• Glyphs are separated with |
• Unicode codepoints are expressed as zero-padded four (or more) digit hexadecimal numbers preceded by U+
• If HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, the cluster will be indicated with a = then hb_glyph_info_t.cluster.

json
A machine-readable, structured format. The serialized codepoints will be a list of objects with the following properties:

• u: the Unicode codepoint as a decimal integer
• cl: hb_glyph_info_t.cluster if HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.

For example:

 [{u:1617,cl:0},{u:1576,cl:1}]
 

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSerializeUnicode

public static int bufferSerializeUnicode(Buffer buffer,
 int start,
 int end,
 Out<byte[]> buf,
 @Nullable
 @Nullable Out<Integer> bufConsumed,
 BufferSerializeFormat format,
 BufferSerializeFlags... flags)

Serializes buffer into a textual representation of its content, when the buffer contains Unicode codepoints (i.e., before shaping). This is useful for showing the contents of the buffer, for example during debugging. There are currently two supported serialization formats:

text
A human-readable, plain text format. The serialized codepoints will look something like:

  <U+0651=0|U+0628=1>
 

• Glyphs are separated with |
• Unicode codepoints are expressed as zero-padded four (or more) digit hexadecimal numbers preceded by U+
• If HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, the cluster will be indicated with a = then hb_glyph_info_t.cluster.

json
A machine-readable, structured format. The serialized codepoints will be a list of objects with the following properties:

• u: the Unicode codepoint as a decimal integer
• cl: hb_glyph_info_t.cluster if HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.

For example:

 [{u:1617,cl:0},{u:1576,cl:1}]
 

Parameters:

buffer - an hb_buffer_t buffer.

start - the first item in buffer to serialize.

end - the last item in buffer to serialize.

buf - output string to write serialized buffer into.

bufConsumed - if not NULL, will be set to the number of bytes written into buf.

format - the hb_buffer_serialize_format_t to use for formatting the output.

flags - the hb_buffer_serialize_flags_t that control what glyph properties to serialize.

Returns:

The number of serialized items.

bufferSetClusterLevel

public static void bufferSetClusterLevel(Buffer buffer,
 BufferClusterLevel clusterLevel)

Sets the cluster level of a buffer. The hb_buffer_cluster_level_t dictates one aspect of how HarfBuzz will treat non-base characters during shaping.

Parameters:

buffer - An hb_buffer_t

clusterLevel - The cluster level to set on the buffer

bufferSetContentType

public static void bufferSetContentType(Buffer buffer,
 BufferContentType contentType)

Sets the type of buffer contents. Buffers are either empty, contain characters (before shaping), or contain glyphs (the result of shaping).

You rarely need to call this function, since a number of other functions transition the content type for you. Namely:

• A newly created buffer starts with content type BufferContentType.INVALID. Calling hb_buffer_reset(), hb_buffer_clear_contents(), as well as calling hb_buffer_set_length() with an argument of zero all set the buffer content type to invalid as well.

• Calling hb_buffer_add_utf8(), hb_buffer_add_utf16(), hb_buffer_add_utf32(), hb_buffer_add_codepoints() and hb_buffer_add_latin1() expect that buffer is either empty and have a content type of invalid, or that buffer content type is BufferContentType.UNICODE, and they also set the content type to Unicode if they added anything to an empty buffer.

• Finally hb_shape() and hb_shape_full() expect that the buffer is either empty and have content type of invalid, or that buffer content type is BufferContentType.UNICODE, and upon success they set the buffer content type to BufferContentType.GLYPHS.

The above transitions are designed such that one can use a buffer in a loop of "reset : add-text : shape" without needing to ever modify the content type manually.

Parameters:

buffer - An hb_buffer_t

contentType - The type of buffer contents to set

bufferSetDirection

public static void bufferSetDirection(Buffer buffer,
 Direction direction)

Set the text flow direction of the buffer. No shaping can happen without setting buffer direction, and it controls the visual direction for the output glyphs; for RTL direction the glyphs will be reversed. Many layout features depend on the proper setting of the direction, for example, reversing RTL text before shaping, then shaping with LTR direction is not the same as keeping the text in logical order and shaping with RTL direction.

Parameters:

buffer - An hb_buffer_t

direction - the hb_direction_t of the buffer

bufferSetFlags

public static void bufferSetFlags(Buffer buffer,
 Set<BufferFlags> flags)

Sets buffer flags to flags. See hb_buffer_flags_t.

Parameters:

buffer - An hb_buffer_t

flags - The buffer flags to set

bufferSetFlags

public static void bufferSetFlags(Buffer buffer,
 BufferFlags... flags)

Sets buffer flags to flags. See hb_buffer_flags_t.

Parameters:

buffer - An hb_buffer_t

flags - The buffer flags to set

bufferSetInvisibleGlyph

public static void bufferSetInvisibleGlyph(Buffer buffer,
 Codepoint invisible)

Sets the hb_codepoint_t that replaces invisible characters in the shaping result. If set to zero (default), the glyph for the U+0020 SPACE character is used. Otherwise, this value is used verbatim.

Parameters:

buffer - An hb_buffer_t

invisible - the invisible hb_codepoint_t

bufferSetLanguage

public static void bufferSetLanguage(Buffer buffer,
 Language language)

Sets the language of buffer to language.

Languages are crucial for selecting which OpenType feature to apply to the buffer which can result in applying language-specific behaviour. Languages are orthogonal to the scripts, and though they are related, they are different concepts and should not be confused with each other.

Use hb_language_from_string() to convert from BCP 47 language tags to hb_language_t.

Parameters:

buffer - An hb_buffer_t

language - An hb_language_t to set

bufferSetLength

public static Bool bufferSetLength(Buffer buffer,
 int length)

Similar to hb_buffer_pre_allocate(), but clears any new items added at the end.

Parameters:

buffer - An hb_buffer_t

length - The new length of buffer

Returns:

true if buffer memory allocation succeeded, false otherwise.

bufferSetMessageFunc

public static void bufferSetMessageFunc(Buffer buffer,
 BufferMessageFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_buffer_message_func_t.

Parameters:

buffer - An hb_buffer_t

func - Callback function

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

bufferSetNotFoundGlyph

public static void bufferSetNotFoundGlyph(Buffer buffer,
 Codepoint notFound)

Sets the hb_codepoint_t that replaces characters not found in the font during shaping.

The not-found glyph defaults to zero, sometimes known as the ".notdef" glyph. This API allows for differentiating the two.

Parameters:

buffer - An hb_buffer_t

notFound - the not-found hb_codepoint_t

bufferSetRandomState

public static void bufferSetRandomState(Buffer buffer,
 int state)

Sets the random state of the buffer. The state changes every time a glyph uses randomness (eg. the rand OpenType feature). This function together with hb_buffer_get_random_state() allow for transferring the current random state to a subsequent buffer, to get better randomness distribution.

Defaults to 1 and when buffer contents are cleared. A value of 0 disables randomness during shaping.

Parameters:

buffer - An hb_buffer_t

state - the new random state

bufferSetReplacementCodepoint

public static void bufferSetReplacementCodepoint(Buffer buffer,
 Codepoint replacement)

Sets the hb_codepoint_t that replaces invalid entries for a given encoding when adding text to buffer.

Default is HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT.

Parameters:

buffer - An hb_buffer_t

replacement - the replacement hb_codepoint_t

bufferSetScript

public static void bufferSetScript(Buffer buffer,
 Script script)

Sets the script of buffer to script.

Script is crucial for choosing the proper shaping behaviour for scripts that require it (e.g. Arabic) and the which OpenType features defined in the font to be applied.

You can pass one of the predefined hb_script_t values, or use hb_script_from_string() or hb_script_from_iso15924_tag() to get the corresponding script from an ISO 15924 script tag.

Parameters:

buffer - An hb_buffer_t

script - An hb_script_t to set.

bufferSetSegmentProperties

public static void bufferSetSegmentProperties(Buffer buffer,
 SegmentProperties props)

Sets the segment properties of the buffer, a shortcut for calling hb_buffer_set_direction(), hb_buffer_set_script() and hb_buffer_set_language() individually.

Parameters:

buffer - An hb_buffer_t

props - An hb_segment_properties_t to use

bufferSetUnicodeFuncs

public static void bufferSetUnicodeFuncs(Buffer buffer,
 UnicodeFuncs unicodeFuncs)

Sets the Unicode-functions structure of a buffer to unicodeFuncs.

Parameters:

buffer - An hb_buffer_t

unicodeFuncs - The Unicode-functions structure

bufferSetUserData

public static Bool bufferSetUserData(Buffer buffer,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified buffer.

Parameters:

buffer - An hb_buffer_t

key - The user-data key

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

colorGetAlpha

public static byte colorGetAlpha(Color color)

Fetches the alpha channel of the given color.

Parameters:

color - an hb_color_t we are interested in its channels.

Returns:

Alpha channel value

colorGetBlue

public static byte colorGetBlue(Color color)

Fetches the blue channel of the given color.

Parameters:

color - an hb_color_t we are interested in its channels.

Returns:

Blue channel value

colorGetGreen

public static byte colorGetGreen(Color color)

Fetches the green channel of the given color.

Parameters:

color - an hb_color_t we are interested in its channels.

Returns:

Green channel value

colorGetRed

public static byte colorGetRed(Color color)

Fetches the red channel of the given color.

Parameters:

color - an hb_color_t we are interested in its channels.

Returns:

Red channel value

colorLineGetColorStops

public static int colorLineGetColorStops(ColorLine colorLine,
 int start,
 @Nullable
 @Nullable Out<ColorStop[]> colorStops)

Fetches a list of color stops from the given color line object.

Note that due to variations being applied, the returned color stops may be out of order. It is the callers responsibility to ensure that color stops are sorted by their offset before they are used.

Parameters:

colorLine - a hb_color_line_t object

start - the index of the first color stop to return

colorStops - Array of hb_color_stop_t to populate

Returns:

the total number of color stops in colorLine

colorLineGetExtend

public static PaintExtend colorLineGetExtend(ColorLine colorLine)

Fetches the extend mode of the color line object.

Parameters:

colorLine - a hb_color_line_t object

Returns:

the extend mode of colorLine

directionFromString

public static Direction directionFromString(byte[] str)

Converts a string to an hb_direction_t.

Matching is loose and applies only to the first letter. For examples, "LTR" and "left-to-right" will both return HB_DIRECTION_LTR.

Unmatched strings will return HB_DIRECTION_INVALID.

Parameters:

str - String to convert

Returns:

The hb_direction_t matching str

directionToString

public static String directionToString(Direction direction)

Converts an hb_direction_t to a string.

Parameters:

direction - The hb_direction_t to convert

Returns:

The string corresponding to direction

drawClosePath

public static void drawClosePath(DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData,
 DrawState st)

Perform a "close-path" draw operation.

Parameters:

dfuncs - draw functions

drawData - associated draw data passed by the caller

st - current draw state

drawCubicTo

public static void drawCubicTo(DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData,
 DrawState st,
 float control1X,
 float control1Y,
 float control2X,
 float control2Y,
 float toX,
 float toY)

Perform a "cubic-to" draw operation.

Parameters:

dfuncs - draw functions

drawData - associated draw data passed by the caller

st - current draw state

control1X - X component of first control point

control1Y - Y component of first control point

control2X - X component of second control point

control2Y - Y component of second control point

toX - X component of target point

toY - Y component of target point

drawFuncsCreate

public static DrawFuncs drawFuncsCreate()

Creates a new draw callbacks object.

Returns:

A newly allocated hb_draw_funcs_t with a reference count of 1. The initial reference count should be released with hb_draw_funcs_destroy when you are done using the hb_draw_funcs_t. This function never returns NULL. If memory cannot be allocated, a special singleton hb_draw_funcs_t object will be returned.

drawFuncsDestroy

public static void drawFuncsDestroy(DrawFuncs dfuncs)

Deallocate the dfuncs. Decreases the reference count on dfuncs by one. If the result is zero, then dfuncs and all associated resources are freed. See hb_draw_funcs_reference().

Parameters:

dfuncs - draw functions

drawFuncsGetEmpty

public static DrawFuncs drawFuncsGetEmpty()

Fetches the singleton empty draw-functions structure.

Returns:

The empty draw-functions structure

drawFuncsGetUserData

public static MemorySegment drawFuncsGetUserData(DrawFuncs dfuncs,
 UserDataKey key)

Fetches the user-data associated with the specified key, attached to the specified draw-functions structure.

Parameters:

dfuncs - The draw-functions structure

key - The user-data key to query

Returns:

A pointer to the user data

drawFuncsIsImmutable

public static Bool drawFuncsIsImmutable(DrawFuncs dfuncs)

Checks whether dfuncs is immutable.

Parameters:

dfuncs - draw functions

Returns:

true if dfuncs is immutable, false otherwise

drawFuncsMakeImmutable

public static void drawFuncsMakeImmutable(DrawFuncs dfuncs)

Makes dfuncs object immutable.

Parameters:

dfuncs - draw functions

drawFuncsReference

public static DrawFuncs drawFuncsReference(DrawFuncs dfuncs)

Increases the reference count on dfuncs by one.

This prevents dfuncs from being destroyed until a matching call to hb_draw_funcs_destroy() is made.

Parameters:

dfuncs - draw functions

Returns:

The referenced hb_draw_funcs_t.

drawFuncsSetClosePathFunc

public static void drawFuncsSetClosePathFunc(DrawFuncs dfuncs,
 DrawClosePathFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets close-path callback to the draw functions object.

Parameters:

dfuncs - draw functions object

func - close-path callback

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

drawFuncsSetCubicToFunc

public static void drawFuncsSetCubicToFunc(DrawFuncs dfuncs,
 DrawCubicToFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets cubic-to callback to the draw functions object.

Parameters:

dfuncs - draw functions

func - cubic-to callback

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

drawFuncsSetLineToFunc

public static void drawFuncsSetLineToFunc(DrawFuncs dfuncs,
 DrawLineToFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets line-to callback to the draw functions object.

Parameters:

dfuncs - draw functions object

func - line-to callback

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

drawFuncsSetMoveToFunc

public static void drawFuncsSetMoveToFunc(DrawFuncs dfuncs,
 DrawMoveToFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets move-to callback to the draw functions object.

Parameters:

dfuncs - draw functions object

func - move-to callback

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

drawFuncsSetQuadraticToFunc

public static void drawFuncsSetQuadraticToFunc(DrawFuncs dfuncs,
 DrawQuadraticToFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets quadratic-to callback to the draw functions object.

Parameters:

dfuncs - draw functions object

func - quadratic-to callback

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

drawFuncsSetUserData

public static Bool drawFuncsSetUserData(DrawFuncs dfuncs,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified draw-functions structure.

Parameters:

dfuncs - The draw-functions structure

key - The user-data key

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

drawLineTo

public static void drawLineTo(DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData,
 DrawState st,
 float toX,
 float toY)

Perform a "line-to" draw operation.

Parameters:

dfuncs - draw functions

drawData - associated draw data passed by the caller

st - current draw state

toX - X component of target point

toY - Y component of target point

drawMoveTo

public static void drawMoveTo(DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData,
 DrawState st,
 float toX,
 float toY)

Perform a "move-to" draw operation.

Parameters:

dfuncs - draw functions

drawData - associated draw data passed by the caller

st - current draw state

toX - X component of target point

toY - Y component of target point

drawQuadraticTo

public static void drawQuadraticTo(DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData,
 DrawState st,
 float controlX,
 float controlY,
 float toX,
 float toY)

Perform a "quadratic-to" draw operation.

Parameters:

dfuncs - draw functions

drawData - associated draw data passed by the caller

st - current draw state

controlX - X component of control point

controlY - Y component of control point

toX - X component of target point

toY - Y component of target point

faceBuilderAddTable

public static Bool faceBuilderAddTable(Face face,
 Tag tag,
 Blob blob)

Add table for tag with data provided by blob to the face. face must be created using hb_face_builder_create().

Parameters:

face - A face object created with hb_face_builder_create()

tag - The hb_tag_t of the table to add

blob - The blob containing the table data to add

faceBuilderCreate

public static Face faceBuilderCreate()

Creates a hb_face_t that can be used with hb_face_builder_add_table(). After tables are added to the face, it can be compiled to a binary font file by calling hb_face_reference_blob().

Returns:

New face.

faceBuilderSortTables

public static void faceBuilderSortTables(Face face,
 Tag[] tags)

Set the ordering of tables for serialization. Any tables not specified in the tags list will be ordered after the tables in tags, ordered by the default sort ordering.

Parameters:

face - A face object created with hb_face_builder_create()

tags - ordered list of table tags terminated by HB_TAG_NONE

faceCollectNominalGlyphMapping

public static void faceCollectNominalGlyphMapping(Face face,
 Map mapping,
 @Nullable
 @Nullable Set unicodes)

Collects the mapping from Unicode characters to nominal glyphs of the face, and optionally all of the Unicode characters covered by face.

Parameters:

face - A face object

mapping - The map to add Unicode-to-glyph mapping to

unicodes - The set to add Unicode characters to, or NULL

faceCollectUnicodes

public static void faceCollectUnicodes(Face face,
 Set out)

Collects all of the Unicode characters covered by face and adds them to the hb_set_t set out.

Parameters:

face - A face object

out - The set to add Unicode characters to

faceCollectVariationSelectors

public static void faceCollectVariationSelectors(Face face,
 Set out)

Collects all Unicode "Variation Selector" characters covered by face and adds them to the hb_set_t set out.

Parameters:

face - A face object

out - The set to add Variation Selector characters to

faceCollectVariationUnicodes

public static void faceCollectVariationUnicodes(Face face,
 Codepoint variationSelector,
 Set out)

Collects all Unicode characters for variationSelector covered by face and adds them to the hb_set_t set out.

Parameters:

face - A face object

variationSelector - The Variation Selector to query

out - The set to add Unicode characters to

faceCount

public static int faceCount(Blob blob)

Fetches the number of faces in a blob.

Parameters:

blob - a blob.

Returns:

Number of faces in blob

faceCreate

public static Face faceCreate(Blob blob,
 int index)

Constructs a new face object from the specified blob and a face index into that blob.

The face index is used for blobs of file formats such as TTC and DFont that can contain more than one face. Face indices within such collections are zero-based.

<note>Note: If the blob font format is not a collection, index is ignored. Otherwise, only the lower 16-bits of index are used. The unmodified index can be accessed via hb_face_get_index().</note>

<note>Note: The high 16-bits of index, if non-zero, are used by hb_font_create() to load named-instances in variable fonts. See hb_font_create() for details.</note>

Parameters:

blob - hb_blob_t to work upon

index - The index of the face within blob

Returns:

The new face object

faceCreateForTables

public static Face faceCreateForTables(ReferenceTableFunc referenceTableFunc,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Variant of hb_face_create(), built for those cases where it is more convenient to provide data for individual tables instead of the whole font data. With the caveat that hb_face_get_table_tags() does not currently work with faces created this way.

Creates a new face object from the specified userData and referenceTableFunc, with the destroy callback.

Parameters:

referenceTableFunc - Table-referencing function

userData - A pointer to the user data

destroy - A callback to call when data is not needed anymore

Returns:

The new face object

faceDestroy

public static void faceDestroy(Face face)

Decreases the reference count on a face object. When the reference count reaches zero, the face is destroyed, freeing all memory.

Parameters:

face - A face object

faceGetEmpty

public static Face faceGetEmpty()

Fetches the singleton empty face object.

Returns:

The empty face object

faceGetGlyphCount

public static int faceGetGlyphCount(Face face)

Fetches the glyph-count value of the specified face object.

Parameters:

face - A face object

Returns:

The glyph-count value of face

faceGetIndex

public static int faceGetIndex(Face face)

Fetches the face-index corresponding to the given face.

<note>Note: face indices within a collection are zero-based.</note>

Parameters:

face - A face object

Returns:

The index of face.

faceGetTableTags

public static int faceGetTableTags(Face face,
 int startOffset,
 Out<Tag[]> tableTags)

Fetches a list of all table tags for a face, if possible. The list returned will begin at the offset provided

Parameters:

face - A face object

startOffset - The index of first table tag to retrieve

tableTags - The array of table tags found

Returns:

Total number of tables, or zero if it is not possible to list

faceGetUpem

public static int faceGetUpem(Face face)

Fetches the units-per-em (UPEM) value of the specified face object.

Typical UPEM values for fonts are 1000, or 2048, but any value in between 16 and 16,384 is allowed for OpenType fonts.

Parameters:

face - A face object

Returns:

The upem value of face

faceGetUserData

public static MemorySegment faceGetUserData(Face face,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified face object.

Parameters:

face - A face object

key - The user-data key to query

Returns:

A pointer to the user data

faceIsImmutable

public static Bool faceIsImmutable(Face face)

Tests whether the given face object is immutable.

Parameters:

face - A face object

Returns:

true is face is immutable, false otherwise

faceMakeImmutable

public static void faceMakeImmutable(Face face)

Makes the given face object immutable.

Parameters:

face - A face object

faceReference

public static Face faceReference(Face face)

Increases the reference count on a face object.

Parameters:

face - A face object

Returns:

The face object

faceReferenceBlob

public static Blob faceReferenceBlob(Face face)

Fetches a pointer to the binary blob that contains the specified face. Returns an empty blob if referencing face data is not possible.

Parameters:

face - A face object

Returns:

A pointer to the blob for face

faceReferenceTable

public static Blob faceReferenceTable(Face face,
 Tag tag)

Fetches a reference to the specified table within the specified face.

Parameters:

face - A face object

tag - The hb_tag_t of the table to query

Returns:

A pointer to the tag table within face

faceSetGlyphCount

public static void faceSetGlyphCount(Face face,
 int glyphCount)

Sets the glyph count for a face object to the specified value.

This API is used in rare circumstances.

Parameters:

face - A face object

glyphCount - The glyph-count value to assign

faceSetIndex

public static void faceSetIndex(Face face,
 int index)

Assigns the specified face-index to face. Fails if the face is immutable.

<note>Note: changing the index has no effect on the face itself This only changes the value returned by hb_face_get_index().</note>

Parameters:

face - A face object

index - The index to assign

faceSetUpem

public static void faceSetUpem(Face face,
 int upem)

Sets the units-per-em (upem) for a face object to the specified value.

This API is used in rare circumstances.

Parameters:

face - A face object

upem - The units-per-em value to assign

faceSetUserData

public static Bool faceSetUserData(Face face,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the given face object.

Parameters:

face - A face object

key - The user-data key to set

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

featureFromString

public static Bool featureFromString(byte[] str,
 Feature feature)

Parses a string into a hb_feature_t.

The format for specifying feature strings follows. All valid CSS font-feature-settings values other than 'normal' and the global values are also accepted, though not documented below. CSS string escapes are not supported.

The range indices refer to the positions between Unicode characters. The position before the first character is always 0.

The format is Python-esque. Here is how it all works:

<informaltable pgwide='1' align='left' frame='none'> <tgroup cols='5'> <thead> <row><entry>Syntax</entry> <entry>Value</entry> <entry>Start</entry> <entry>End</entry></row> </thead> <tbody> <row><entry>Setting value:</entry></row> <row><entry>kern</entry> <entry>1</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature on</entry></row> <row><entry>+kern</entry> <entry>1</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature on</entry></row> <row><entry>-kern</entry> <entry>0</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature off</entry></row> <row><entry>kern=0</entry> <entry>0</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature off</entry></row> <row><entry>kern=1</entry> <entry>1</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature on</entry></row> <row><entry>aalt=2</entry> <entry>2</entry> <entry>0</entry> <entry>∞</entry> <entry>Choose 2nd alternate</entry></row> <row><entry>Setting index:</entry></row> <row><entry>kern[]</entry> <entry>1</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature on</entry></row> <row><entry>kern[:]</entry> <entry>1</entry> <entry>0</entry> <entry>∞</entry> <entry>Turn feature on</entry></row> <row><entry>kern[5:]</entry> <entry>1</entry> <entry>5</entry> <entry>∞</entry> <entry>Turn feature on, partial</entry></row> <row><entry>kern[:5]</entry> <entry>1</entry> <entry>0</entry> <entry>5</entry> <entry>Turn feature on, partial</entry></row> <row><entry>kern[3:5]</entry> <entry>1</entry> <entry>3</entry> <entry>5</entry> <entry>Turn feature on, range</entry></row> <row><entry>kern[3]</entry> <entry>1</entry> <entry>3</entry> <entry>3+1</entry> <entry>Turn feature on, single char</entry></row> <row><entry>Mixing it all:</entry></row> <row><entry>aalt[3:5]=2</entry> <entry>2</entry> <entry>3</entry> <entry>5</entry> <entry>Turn 2nd alternate on for range</entry></row> </tbody> </tgroup> </informaltable>

Parameters:

str - a string to parse

feature - the hb_feature_t to initialize with the parsed values

Returns:

true if str is successfully parsed, false otherwise

featureToString

public static void featureToString(Feature feature,
 Out<String[]> buf)

Converts a hb_feature_t into a NULL-terminated string in the format understood by hb_feature_from_string(). The client in responsible for allocating big enough size for buf, 128 bytes is more than enough.

Parameters:

feature - an hb_feature_t to convert

buf - output string

fontAddGlyphOriginForDirection

public static void fontAddGlyphOriginForDirection(Font font,
 Codepoint glyph,
 Direction direction,
 Position x,
 Position y)

Adds the origin coordinates to an (X,Y) point coordinate, in the specified glyph ID in the specified font.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

direction - The direction of the text segment

x - Input = The original X coordinate Output = The X coordinate plus the X-coordinate of the origin

y - Input = The original Y coordinate Output = The Y coordinate plus the Y-coordinate of the origin

fontChanged

public static void fontChanged(Font font)

Notifies the font that underlying font data has changed. This has the effect of increasing the serial as returned by hb_font_get_serial(), which invalidates internal caches.

Parameters:

font - hb_font_t to work upon

fontCreate

public static Font fontCreate(Face face)

Constructs a new font object from the specified face.

<note>Note: If face's index value (as passed to hb_face_create() has non-zero top 16-bits, those bits minus one are passed to hb_font_set_var_named_instance(), effectively loading a named-instance of a variable font, instead of the default-instance. This allows specifying which named-instance to load by default when creating the face.</note>

Parameters:

face - a face.

Returns:

The new font object

fontCreateSubFont

public static Font fontCreateSubFont(Font parent)

Constructs a sub-font font object from the specified parent font, replicating the parent's properties.

Parameters:

parent - The parent font object

Returns:

The new sub-font font object

fontDestroy

public static void fontDestroy(Font font)

Decreases the reference count on the given font object. When the reference count reaches zero, the font is destroyed, freeing all memory.

Parameters:

font - hb_font_t to work upon

fontDrawGlyph

public static void fontDrawGlyph(Font font,
 Codepoint glyph,
 DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData)

Draws the outline that corresponds to a glyph in the specified font.

The outline is returned by way of calls to the callbacks of the dfuncs objects, with drawData passed to them.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID

dfuncs - hb_draw_funcs_t to draw to

drawData - User data to pass to draw callbacks

fontFuncsCreate

public static FontFuncs fontFuncsCreate()

Creates a new hb_font_funcs_t structure of font functions.

Returns:

The font-functions structure

fontFuncsDestroy

public static void fontFuncsDestroy(FontFuncs ffuncs)

Decreases the reference count on a font-functions structure. When the reference count reaches zero, the font-functions structure is destroyed, freeing all memory.

Parameters:

ffuncs - The font-functions structure

fontFuncsGetEmpty

public static FontFuncs fontFuncsGetEmpty()

Fetches an empty font-functions structure.

Returns:

The font-functions structure

fontFuncsGetUserData

public static MemorySegment fontFuncsGetUserData(FontFuncs ffuncs,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified font-functions structure.

Parameters:

ffuncs - The font-functions structure

key - The user-data key to query

Returns:

A pointer to the user data

fontFuncsIsImmutable

public static Bool fontFuncsIsImmutable(FontFuncs ffuncs)

Tests whether a font-functions structure is immutable.

Parameters:

ffuncs - The font-functions structure

Returns:

true if ffuncs is immutable, false otherwise

fontFuncsMakeImmutable

public static void fontFuncsMakeImmutable(FontFuncs ffuncs)

Makes a font-functions structure immutable.

Parameters:

ffuncs - The font-functions structure

fontFuncsReference

public static FontFuncs fontFuncsReference(FontFuncs ffuncs)

Increases the reference count on a font-functions structure.

Parameters:

ffuncs - The font-functions structure

Returns:

The font-functions structure

fontFuncsSetDrawGlyphFunc

public static void fontFuncsSetDrawGlyphFunc(FontFuncs ffuncs,
 FontDrawGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_draw_glyph_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetFontHExtentsFunc

public static void fontFuncsSetFontHExtentsFunc(FontFuncs ffuncs,
 FontGetFontHExtentsFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_font_h_extents_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetFontVExtentsFunc

public static void fontFuncsSetFontVExtentsFunc(FontFuncs ffuncs,
 FontGetFontVExtentsFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_font_v_extents_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphContourPointFunc

public static void fontFuncsSetGlyphContourPointFunc(FontFuncs ffuncs,
 FontGetGlyphContourPointFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_contour_point_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphExtentsFunc

public static void fontFuncsSetGlyphExtentsFunc(FontFuncs ffuncs,
 FontGetGlyphExtentsFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_extents_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphFromNameFunc

public static void fontFuncsSetGlyphFromNameFunc(FontFuncs ffuncs,
 FontGetGlyphFromNameFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_from_name_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphFunc

@Deprecated
public static void fontFuncsSetGlyphFunc(FontFuncs ffuncs,
 FontGetGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Deprecated.

Deprecated. Use hb_font_funcs_set_nominal_glyph_func() and hb_font_funcs_set_variation_glyph_func() instead.

Parameters:

ffuncs - The font-functions structure

func - callback function

userData - data to pass to func

destroy - function to call when userData is not needed anymore

fontFuncsSetGlyphHAdvanceFunc

public static void fontFuncsSetGlyphHAdvanceFunc(FontFuncs ffuncs,
 FontGetGlyphHAdvanceFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_h_advance_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphHAdvancesFunc

public static void fontFuncsSetGlyphHAdvancesFunc(FontFuncs ffuncs,
 FontGetGlyphHAdvancesFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_h_advances_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphHKerningFunc

public static void fontFuncsSetGlyphHKerningFunc(FontFuncs ffuncs,
 FontGetGlyphHKerningFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_h_kerning_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphHOriginFunc

public static void fontFuncsSetGlyphHOriginFunc(FontFuncs ffuncs,
 FontGetGlyphHOriginFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_h_origin_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphNameFunc

public static void fontFuncsSetGlyphNameFunc(FontFuncs ffuncs,
 FontGetGlyphNameFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_name_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphShapeFunc

@Deprecated
public static void fontFuncsSetGlyphShapeFunc(FontFuncs ffuncs,
 FontGetGlyphShapeFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Deprecated.

Use hb_font_funcs_set_draw_glyph_func() instead

Sets the implementation function for hb_font_get_glyph_shape_func_t, which is the same as hb_font_draw_glyph_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphVAdvanceFunc

public static void fontFuncsSetGlyphVAdvanceFunc(FontFuncs ffuncs,
 FontGetGlyphVAdvanceFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_v_advance_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphVAdvancesFunc

public static void fontFuncsSetGlyphVAdvancesFunc(FontFuncs ffuncs,
 FontGetGlyphVAdvancesFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_v_advances_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphVKerningFunc

@Deprecated
public static void fontFuncsSetGlyphVKerningFunc(FontFuncs ffuncs,
 FontGetGlyphVKerningFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Deprecated.

Sets the implementation function for hb_font_get_glyph_v_kerning_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetGlyphVOriginFunc

public static void fontFuncsSetGlyphVOriginFunc(FontFuncs ffuncs,
 FontGetGlyphVOriginFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_glyph_v_origin_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetNominalGlyphFunc

public static void fontFuncsSetNominalGlyphFunc(FontFuncs ffuncs,
 FontGetNominalGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_nominal_glyph_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetNominalGlyphsFunc

public static void fontFuncsSetNominalGlyphsFunc(FontFuncs ffuncs,
 FontGetNominalGlyphsFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_nominal_glyphs_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontFuncsSetPaintGlyphFunc

public static void fontFuncsSetPaintGlyphFunc(FontFuncs ffuncs,
 FontPaintGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_paint_glyph_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is no longer needed

fontFuncsSetUserData

public static Bool fontFuncsSetUserData(FontFuncs ffuncs,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified font-functions structure.

Parameters:

ffuncs - The font-functions structure

key - The user-data key to set

data - A pointer to the user data set

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

fontFuncsSetVariationGlyphFunc

public static void fontFuncsSetVariationGlyphFunc(FontFuncs ffuncs,
 FontGetVariationGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_font_get_variation_glyph_func_t.

Parameters:

ffuncs - A font-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

fontGetEmpty

public static Font fontGetEmpty()

Fetches the empty font object.

Returns:

The empty font object

fontGetExtentsForDirection

public static void fontGetExtentsForDirection(Font font,
 Direction direction,
 FontExtents extents)

Fetches the extents for a font in a text segment of the specified direction.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

direction - The direction of the text segment

extents - The hb_font_extents_t retrieved

fontGetFace

public static Face fontGetFace(Font font)

Fetches the face associated with the specified font object.

Parameters:

font - hb_font_t to work upon

Returns:

The hb_face_t value

fontGetGlyph

public static Bool fontGetGlyph(Font font,
 Codepoint unicode,
 Codepoint variationSelector,
 Codepoint glyph)

Fetches the glyph ID for a Unicode code point in the specified font, with an optional variation selector.

If variationSelector is 0, calls hb_font_get_nominal_glyph(); otherwise calls hb_font_get_variation_glyph().

Parameters:

font - hb_font_t to work upon

unicode - The Unicode code point to query

variationSelector - A variation-selector code point

glyph - The glyph ID retrieved

Returns:

true if data found, false otherwise

fontGetGlyphAdvanceForDirection

public static void fontGetGlyphAdvanceForDirection(Font font,
 Codepoint glyph,
 Direction direction,
 Position x,
 Position y)

Fetches the advance for a glyph ID from the specified font, in a text segment of the specified direction.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

direction - The direction of the text segment

x - The horizontal advance retrieved

y - The vertical advance retrieved

fontGetGlyphAdvancesForDirection

public static void fontGetGlyphAdvancesForDirection(Font font,
 Direction direction,
 int count,
 Codepoint firstGlyph,
 int glyphStride,
 Position firstAdvance,
 int advanceStride)

Fetches the advances for a sequence of glyph IDs in the specified font, in a text segment of the specified direction.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

direction - The direction of the text segment

count - The number of glyph IDs in the sequence queried

firstGlyph - The first glyph ID to query

glyphStride - The stride between successive glyph IDs

firstAdvance - The first advance retrieved

advanceStride - The stride between successive advances

fontGetGlyphContourPoint

public static Bool fontGetGlyphContourPoint(Font font,
 Codepoint glyph,
 int pointIndex,
 Position x,
 Position y)

Fetches the (x,y) coordinates of a specified contour-point index in the specified glyph, within the specified font.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

pointIndex - The contour-point index to query

x - The X value retrieved for the contour point

y - The Y value retrieved for the contour point

Returns:

true if data found, false otherwise

fontGetGlyphContourPointForOrigin

public static Bool fontGetGlyphContourPointForOrigin(Font font,
 Codepoint glyph,
 int pointIndex,
 Direction direction,
 Position x,
 Position y)

Fetches the (X,Y) coordinates of a specified contour-point index in the specified glyph ID in the specified font, with respect to the origin in a text segment in the specified direction.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

pointIndex - The contour-point index to query

direction - The direction of the text segment

x - The X value retrieved for the contour point

y - The Y value retrieved for the contour point

Returns:

true if data found, false otherwise

fontGetGlyphExtents

public static Bool fontGetGlyphExtents(Font font,
 Codepoint glyph,
 GlyphExtents extents)

Fetches the hb_glyph_extents_t data for a glyph ID in the specified font.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

extents - The hb_glyph_extents_t retrieved

Returns:

true if data found, false otherwise

fontGetGlyphExtentsForOrigin

public static Bool fontGetGlyphExtentsForOrigin(Font font,
 Codepoint glyph,
 Direction direction,
 GlyphExtents extents)

Fetches the hb_glyph_extents_t data for a glyph ID in the specified font, with respect to the origin in a text segment in the specified direction.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

direction - The direction of the text segment

extents - The hb_glyph_extents_t retrieved

Returns:

true if data found, false otherwise

fontGetGlyphFromName

public static Bool fontGetGlyphFromName(Font font,
 String[] name,
 Codepoint glyph)

Fetches the glyph ID that corresponds to a name string in the specified font.

<note>Note: len == -1 means the name string is null-terminated.</note>

Parameters:

font - hb_font_t to work upon

name - The name string to query

glyph - The glyph ID retrieved

Returns:

true if data found, false otherwise

fontGetGlyphHAdvance

public static Position fontGetGlyphHAdvance(Font font,
 Codepoint glyph)

Fetches the advance for a glyph ID in the specified font, for horizontal text segments.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

Returns:

The advance of glyph within font

fontGetGlyphHAdvances

public static void fontGetGlyphHAdvances(Font font,
 int count,
 Codepoint firstGlyph,
 int glyphStride,
 Position firstAdvance,
 int advanceStride)

Fetches the advances for a sequence of glyph IDs in the specified font, for horizontal text segments.

Parameters:

font - hb_font_t to work upon

count - The number of glyph IDs in the sequence queried

firstGlyph - The first glyph ID to query

glyphStride - The stride between successive glyph IDs

firstAdvance - The first advance retrieved

advanceStride - The stride between successive advances

fontGetGlyphHKerning

public static Position fontGetGlyphHKerning(Font font,
 Codepoint leftGlyph,
 Codepoint rightGlyph)

Fetches the kerning-adjustment value for a glyph-pair in the specified font, for horizontal text segments.

<note>It handles legacy kerning only (as returned by the corresponding hb_font_funcs_t function).</note>

Parameters:

font - hb_font_t to work upon

leftGlyph - The glyph ID of the left glyph in the glyph pair

rightGlyph - The glyph ID of the right glyph in the glyph pair

Returns:

The kerning adjustment value

fontGetGlyphHOrigin

public static Bool fontGetGlyphHOrigin(Font font,
 Codepoint glyph,
 Position x,
 Position y)

Fetches the (X,Y) coordinates of the origin for a glyph ID in the specified font, for horizontal text segments.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

x - The X coordinate of the origin

y - The Y coordinate of the origin

Returns:

true if data found, false otherwise

fontGetGlyphKerningForDirection

public static void fontGetGlyphKerningForDirection(Font font,
 Codepoint firstGlyph,
 Codepoint secondGlyph,
 Direction direction,
 Position x,
 Position y)

Fetches the kerning-adjustment value for a glyph-pair in the specified font.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

firstGlyph - The glyph ID of the first glyph in the glyph pair to query

secondGlyph - The glyph ID of the second glyph in the glyph pair to query

direction - The direction of the text segment

x - The horizontal kerning-adjustment value retrieved

y - The vertical kerning-adjustment value retrieved

fontGetGlyphName

public static Bool fontGetGlyphName(Font font,
 Codepoint glyph,
 Out<String[]> name)

Fetches the glyph-name string for a glyph ID in the specified font.

According to the OpenType specification, glyph names are limited to 63 characters and can only contain (a subset of) ASCII.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

name - Name string retrieved for the glyph ID

Returns:

true if data found, false otherwise

fontGetGlyphOriginForDirection

public static void fontGetGlyphOriginForDirection(Font font,
 Codepoint glyph,
 Direction direction,
 Position x,
 Position y)

Fetches the (X,Y) coordinates of the origin for a glyph in the specified font.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

direction - The direction of the text segment

x - The X coordinate retrieved for the origin

y - The Y coordinate retrieved for the origin

fontGetGlyphShape

@Deprecated
public static void fontGetGlyphShape(Font font,
 Codepoint glyph,
 DrawFuncs dfuncs,
 @Nullable
 @Nullable MemorySegment drawData)

Deprecated.

Use hb_font_draw_glyph() instead

Fetches the glyph shape that corresponds to a glyph in the specified font. The shape is returned by way of calls to the callbacks of the dfuncs objects, with drawData passed to them.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID

dfuncs - hb_draw_funcs_t to draw to

drawData - User data to pass to draw callbacks

fontGetGlyphVAdvance

public static Position fontGetGlyphVAdvance(Font font,
 Codepoint glyph)

Fetches the advance for a glyph ID in the specified font, for vertical text segments.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

Returns:

The advance of glyph within font

fontGetGlyphVAdvances

public static void fontGetGlyphVAdvances(Font font,
 int count,
 Codepoint firstGlyph,
 int glyphStride,
 Position firstAdvance,
 int advanceStride)

Fetches the advances for a sequence of glyph IDs in the specified font, for vertical text segments.

Parameters:

font - hb_font_t to work upon

count - The number of glyph IDs in the sequence queried

firstGlyph - The first glyph ID to query

glyphStride - The stride between successive glyph IDs

firstAdvance - The first advance retrieved

advanceStride - The stride between successive advances

fontGetGlyphVKerning

@Deprecated
public static Position fontGetGlyphVKerning(Font font,
 Codepoint topGlyph,
 Codepoint bottomGlyph)

Deprecated.

Fetches the kerning-adjustment value for a glyph-pair in the specified font, for vertical text segments.

<note>It handles legacy kerning only (as returned by the corresponding hb_font_funcs_t function).</note>

Parameters:

font - hb_font_t to work upon

topGlyph - The glyph ID of the top glyph in the glyph pair

bottomGlyph - The glyph ID of the bottom glyph in the glyph pair

Returns:

The kerning adjustment value

fontGetGlyphVOrigin

public static Bool fontGetGlyphVOrigin(Font font,
 Codepoint glyph,
 Position x,
 Position y)

Fetches the (X,Y) coordinates of the origin for a glyph ID in the specified font, for vertical text segments.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

x - The X coordinate of the origin

y - The Y coordinate of the origin

Returns:

true if data found, false otherwise

fontGetHExtents

public static Bool fontGetHExtents(Font font,
 FontExtents extents)

Fetches the extents for a specified font, for horizontal text segments.

Parameters:

font - hb_font_t to work upon

extents - The font extents retrieved

Returns:

true if data found, false otherwise

fontGetNominalGlyph

public static Bool fontGetNominalGlyph(Font font,
 Codepoint unicode,
 Codepoint glyph)

Fetches the nominal glyph ID for a Unicode code point in the specified font.

This version of the function should not be used to fetch glyph IDs for code points modified by variation selectors. For variation-selector support, user hb_font_get_variation_glyph() or use hb_font_get_glyph().

Parameters:

font - hb_font_t to work upon

unicode - The Unicode code point to query

glyph - The glyph ID retrieved

Returns:

true if data found, false otherwise

fontGetNominalGlyphs

public static int fontGetNominalGlyphs(Font font,
 int count,
 Codepoint firstUnicode,
 int unicodeStride,
 Codepoint firstGlyph,
 int glyphStride)

Fetches the nominal glyph IDs for a sequence of Unicode code points. Glyph IDs must be returned in a hb_codepoint_t output parameter. Stops at the first unsupported glyph ID.

Parameters:

font - hb_font_t to work upon

count - number of code points to query

firstUnicode - The first Unicode code point to query

unicodeStride - The stride between successive code points

firstGlyph - The first glyph ID retrieved

glyphStride - The stride between successive glyph IDs

Returns:

the number of code points processed

fontGetParent

public static Font fontGetParent(Font font)

Fetches the parent font of font.

Parameters:

font - hb_font_t to work upon

Returns:

The parent font object

fontGetPpem

public static void fontGetPpem(Font font,
 Out<Integer> xPpem,
 Out<Integer> yPpem)

Fetches the horizontal and vertical points-per-em (ppem) of a font.

Parameters:

font - hb_font_t to work upon

xPpem - Horizontal ppem value

yPpem - Vertical ppem value

fontGetPtem

public static float fontGetPtem(Font font)

Fetches the "point size" of a font. Used in CoreText to implement optical sizing.

Parameters:

font - hb_font_t to work upon

Returns:

Point size. A value of zero means "not set."

fontGetScale

public static void fontGetScale(Font font,
 Out<Integer> xScale,
 Out<Integer> yScale)

Fetches the horizontal and vertical scale of a font.

Parameters:

font - hb_font_t to work upon

xScale - Horizontal scale value

yScale - Vertical scale value

fontGetSerial

public static int fontGetSerial(Font font)

Returns the internal serial number of the font. The serial number is increased every time a setting on the font is changed, using a setter function.

Parameters:

font - hb_font_t to work upon

Returns:

serial number

fontGetSyntheticBold

public static void fontGetSyntheticBold(Font font,
 Out<Float> xEmbolden,
 Out<Float> yEmbolden,
 Bool inPlace)

Fetches the "synthetic boldness" parameters of a font.

Parameters:

font - hb_font_t to work upon

xEmbolden - return location for horizontal value

yEmbolden - return location for vertical value

inPlace - return location for in-place value

fontGetSyntheticSlant

public static float fontGetSyntheticSlant(Font font)

Fetches the "synthetic slant" of a font.

Parameters:

font - hb_font_t to work upon

Returns:

Synthetic slant. By default is zero.

fontGetUserData

public static MemorySegment fontGetUserData(Font font,
 UserDataKey key)

Fetches the user-data object associated with the specified key, attached to the specified font object.

Parameters:

font - hb_font_t to work upon

key - The user-data key to query

Returns:

Pointer to the user data

fontGetVExtents

public static Bool fontGetVExtents(Font font,
 FontExtents extents)

Fetches the extents for a specified font, for vertical text segments.

Parameters:

font - hb_font_t to work upon

extents - The font extents retrieved

Returns:

true if data found, false otherwise

fontGetVarCoordsDesign

public static MemorySegment fontGetVarCoordsDesign(Font font,
 Out<Integer> length)

Fetches the list of variation coordinates (in design-space units) currently set on a font.

Note that this returned array may only contain values for some (or none) of the axes; omitted axes effectively have their default values.

Return value is valid as long as variation coordinates of the font are not modified.

Parameters:

font - hb_font_t to work upon

length - Number of coordinates retrieved

Returns:

coordinates array

fontGetVarCoordsNormalized

public static MemorySegment fontGetVarCoordsNormalized(Font font,
 Out<Integer> length)

Fetches the list of normalized variation coordinates currently set on a font.

Note that this returned array may only contain values for some (or none) of the axes; omitted axes effectively have zero values.

Return value is valid as long as variation coordinates of the font are not modified.

Parameters:

font - hb_font_t to work upon

length - Number of coordinates retrieved

Returns:

coordinates array

fontGetVarNamedInstance

public static int fontGetVarNamedInstance(Font font)

Returns the currently-set named-instance index of the font.

Parameters:

font - a font.

Returns:

Named-instance index or HB_FONT_NO_VAR_NAMED_INSTANCE.

fontGetVariationGlyph

public static Bool fontGetVariationGlyph(Font font,
 Codepoint unicode,
 Codepoint variationSelector,
 Codepoint glyph)

Fetches the glyph ID for a Unicode code point when followed by by the specified variation-selector code point, in the specified font.

Parameters:

font - hb_font_t to work upon

unicode - The Unicode code point to query

variationSelector - The variation-selector code point to query

glyph - The glyph ID retrieved

Returns:

true if data found, false otherwise

fontGlyphFromString

public static Bool fontGlyphFromString(Font font,
 byte[] s,
 Codepoint glyph)

Fetches the glyph ID from font that matches the specified string. Strings of the format gidDDD or uniUUUU are parsed automatically.

<note>Note: len == -1 means the string is null-terminated.</note>

Parameters:

font - hb_font_t to work upon

s - string to query

glyph - The glyph ID corresponding to the string requested

Returns:

true if data found, false otherwise

fontGlyphToString

public static void fontGlyphToString(Font font,
 Codepoint glyph,
 Out<String[]> s)

Fetches the name of the specified glyph ID in font and returns it in string s.

If the glyph ID has no name in font, a string of the form gidDDD is generated, with DDD being the glyph ID.

According to the OpenType specification, glyph names are limited to 63 characters and can only contain (a subset of) ASCII.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

s - The string containing the glyph name

fontIsImmutable

public static Bool fontIsImmutable(Font font)

Tests whether a font object is immutable.

Parameters:

font - hb_font_t to work upon

Returns:

true if font is immutable, false otherwise

fontMakeImmutable

public static void fontMakeImmutable(Font font)

Makes font immutable.

Parameters:

font - hb_font_t to work upon

fontPaintGlyph

public static void fontPaintGlyph(Font font,
 Codepoint glyph,
 PaintFuncs pfuncs,
 @Nullable
 @Nullable MemorySegment paintData,
 int paletteIndex,
 Color foreground)

Paints the glyph.

The painting instructions are returned by way of calls to the callbacks of the funcs object, with paintData passed to them.

If the font has color palettes (see hb_ot_color_has_palettes()), then paletteIndex selects the palette to use. If the font only has one palette, this will be 0.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID

pfuncs - hb_paint_funcs_t to paint with

paintData - User data to pass to paint callbacks

paletteIndex - The index of the font's color palette to use

foreground - The foreground color, unpremultipled

fontReference

public static Font fontReference(Font font)

Increases the reference count on the given font object.

Parameters:

font - hb_font_t to work upon

Returns:

The font object

fontSetFace

public static void fontSetFace(Font font,
 Face face)

Sets face as the font-face value of font.

Parameters:

font - hb_font_t to work upon

face - The hb_face_t to assign

fontSetFuncs

public static void fontSetFuncs(Font font,
 FontFuncs klass,
 @Nullable
 @Nullable MemorySegment fontData,
 @Nullable
 @Nullable DestroyFunc destroy)

Replaces the font-functions structure attached to a font, updating the font's user-data with font-data and the destroy callback.

Parameters:

font - hb_font_t to work upon

klass - The font-functions structure.

fontData - Data to attach to font

destroy - The function to call when fontData is not needed anymore

fontSetFuncsData

public static void fontSetFuncsData(Font font,
 @Nullable
 @Nullable MemorySegment fontData,
 @Nullable
 @Nullable DestroyFunc destroy)

Replaces the user data attached to a font, updating the font's destroy callback.

Parameters:

font - hb_font_t to work upon

fontData - Data to attach to font

destroy - The function to call when fontData is not needed anymore

fontSetParent

public static void fontSetParent(Font font,
 Font parent)

Sets the parent font of font.

Parameters:

font - hb_font_t to work upon

parent - The parent font object to assign

fontSetPpem

public static void fontSetPpem(Font font,
 int xPpem,
 int yPpem)

Sets the horizontal and vertical pixels-per-em (PPEM) of a font.

These values are used for pixel-size-specific adjustment to shaping and draw results, though for the most part they are unused and can be left unset.

Parameters:

font - hb_font_t to work upon

xPpem - Horizontal ppem value to assign

yPpem - Vertical ppem value to assign

fontSetPtem

public static void fontSetPtem(Font font,
 float ptem)

Sets the "point size" of a font. Set to zero to unset. Used in CoreText to implement optical sizing.

<note>Note: There are 72 points in an inch.</note>

Parameters:

font - hb_font_t to work upon

ptem - font size in points.

fontSetScale

public static void fontSetScale(Font font,
 int xScale,
 int yScale)

Sets the horizontal and vertical scale of a font.

The font scale is a number related to, but not the same as, font size. Typically the client establishes a scale factor to be used between the two. For example, 64, or 256, which would be the fractional-precision part of the font scale. This is necessary because hb_position_t values are integer types and you need to leave room for fractional values in there.

For example, to set the font size to 20, with 64 levels of fractional precision you would call hb_font_set_scale(font, 20 * 64, 20 * 64).

In the example above, even what font size 20 means is up to you. It might be 20 pixels, or 20 points, or 20 millimeters. HarfBuzz does not care about that. You can set the point size of the font using hb_font_set_ptem(), and the pixel size using hb_font_set_ppem().

The choice of scale is yours but needs to be consistent between what you set here, and what you expect out of hb_position_t as well has draw / paint API output values.

Fonts default to a scale equal to the UPEM value of their face. A font with this setting is sometimes called an "unscaled" font.

Parameters:

font - hb_font_t to work upon

xScale - Horizontal scale value to assign

yScale - Vertical scale value to assign

fontSetSyntheticBold

public static void fontSetSyntheticBold(Font font,
 float xEmbolden,
 float yEmbolden,
 Bool inPlace)

Sets the "synthetic boldness" of a font.

Positive values for xEmbolden / yEmbolden make a font bolder, negative values thinner. Typical values are in the 0.01 to 0.05 range. The default value is zero.

Synthetic boldness is applied by offsetting the contour points of the glyph shape.

Synthetic boldness is applied when rendering a glyph via hb_font_draw_glyph().

If inPlace is false, then glyph advance-widths are also adjusted, otherwise they are not. The in-place mode is useful for simulating font grading.

Parameters:

font - hb_font_t to work upon

xEmbolden - the amount to embolden horizontally

yEmbolden - the amount to embolden vertically

inPlace - whether to embolden glyphs in-place

fontSetSyntheticSlant

public static void fontSetSyntheticSlant(Font font,
 float slant)

Sets the "synthetic slant" of a font. By default is zero. Synthetic slant is the graphical skew applied to the font at rendering time.

HarfBuzz needs to know this value to adjust shaping results, metrics, and style values to match the slanted rendering.

<note>Note: The glyph shape fetched via the hb_font_draw_glyph() function is slanted to reflect this value as well.</note>

<note>Note: The slant value is a ratio. For example, a 20% slant would be represented as a 0.2 value.</note>

Parameters:

font - hb_font_t to work upon

slant - synthetic slant value.

fontSetUserData

public static Bool fontSetUserData(Font font,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified font object.

Parameters:

font - hb_font_t to work upon

key - The user-data key

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

fontSetVarCoordsDesign

public static void fontSetVarCoordsDesign(Font font,
 float[] coords)

Applies a list of variation coordinates (in design-space units) to a font.

Note that this overrides all existing variations set on font. Axes not included in coords will be effectively set to their default values.

Parameters:

font - hb_font_t to work upon

coords - Array of variation coordinates to apply

fontSetVarCoordsNormalized

public static void fontSetVarCoordsNormalized(Font font,
 int[] coords)

Applies a list of variation coordinates (in normalized units) to a font.

Note that this overrides all existing variations set on font. Axes not included in coords will be effectively set to their default values.

<note>Note: Coordinates should be normalized to 2.14.</note>

Parameters:

font - hb_font_t to work upon

coords - Array of variation coordinates to apply

fontSetVarNamedInstance

public static void fontSetVarNamedInstance(Font font,
 int instanceIndex)

Sets design coords of a font from a named-instance index.

Parameters:

font - a font.

instanceIndex - named instance index.

fontSetVariation

public static void fontSetVariation(Font font,
 Tag tag,
 float value)

Change the value of one variation axis on the font.

Note: This function is expensive to be called repeatedly. If you want to set multiple variation axes at the same time, use hb_font_set_variations() instead.

Parameters:

font - hb_font_t to work upon

tag - The hb_tag_t tag of the variation-axis name

value - The value of the variation axis

fontSetVariations

public static void fontSetVariations(Font font,
 Variation[] variations)

Applies a list of font-variation settings to a font.

Note that this overrides all existing variations set on font. Axes not included in variations will be effectively set to their default values.

Parameters:

font - hb_font_t to work upon

variations - Array of variation settings to apply

fontSubtractGlyphOriginForDirection

public static void fontSubtractGlyphOriginForDirection(Font font,
 Codepoint glyph,
 Direction direction,
 Position x,
 Position y)

Subtracts the origin coordinates from an (X,Y) point coordinate, in the specified glyph ID in the specified font.

Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.

Parameters:

font - hb_font_t to work upon

glyph - The glyph ID to query

direction - The direction of the text segment

x - Input = The original X coordinate Output = The X coordinate minus the X-coordinate of the origin

y - Input = The original Y coordinate Output = The Y coordinate minus the Y-coordinate of the origin

ftFaceCreate

public static Face ftFaceCreate(org.freedesktop.freetype.Face ftFace,
 @Nullable
 @Nullable DestroyFunc destroy)

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This variant of the function does not provide any life-cycle management.

Most client programs should use hb_ft_face_create_referenced() (or, perhaps, hb_ft_face_create_cached()) instead.

If you know you have valid reasons not to use hb_ft_face_create_referenced(), then it is the client program's responsibility to destroy ftFace after the hb_face_t face object has been destroyed.

Parameters:

ftFace - FT_Face to work upon

destroy - A callback to call when the face object is not needed anymore

Returns:

the new hb_face_t face object

ftFaceCreateCached

public static Face ftFaceCreateCached(org.freedesktop.freetype.Face ftFace)

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This variant of the function caches the newly created hb_face_t face object, using the generic pointer of ftFace. Subsequent function calls that are passed the same ftFace parameter will have the same hb_face_t returned to them, and that hb_face_t will be correctly reference counted.

However, client programs are still responsible for destroying ftFace after the last hb_face_t face object has been destroyed.

Parameters:

ftFace - FT_Face to work upon

Returns:

the new hb_face_t face object

ftFaceCreateReferenced

public static Face ftFaceCreateReferenced(org.freedesktop.freetype.Face ftFace)

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This is the preferred variant of the hb_ft_face_create* function family, because it calls FT_Reference_Face() on ftFace, ensuring that ftFace remains alive as long as the resulting hb_face_t face object remains alive. Also calls FT_Done_Face() when the hb_face_t face object is destroyed.

Use this version unless you know you have good reasons not to.

Parameters:

ftFace - FT_Face to work upon

Returns:

the new hb_face_t face object

ftFontChanged

public static void ftFontChanged(Font font)

Refreshes the state of font when the underlying FT_Face has changed. This function should be called after changing the size or variation-axis settings on the FT_Face.

Parameters:

font - hb_font_t to work upon

ftFontCreate

public static Font ftFontCreate(org.freedesktop.freetype.Face ftFace,
 @Nullable
 @Nullable DestroyFunc destroy)

Creates an hb_font_t font object from the specified FT_Face.

<note>Note: You must set the face size on ftFace before calling hb_ft_font_create() on it. HarfBuzz assumes size is always set and will access size member of FT_Face unconditionally.</note>

This variant of the function does not provide any life-cycle management.

Most client programs should use hb_ft_font_create_referenced() instead.

If you know you have valid reasons not to use hb_ft_font_create_referenced(), then it is the client program's responsibility to destroy ftFace after the hb_font_t font object has been destroyed.

HarfBuzz will use the destroy callback on the hb_font_t font object if it is supplied when you use this function. However, even if destroy is provided, it is the client program's responsibility to destroy ftFace, and it is the client program's responsibility to ensure that ftFace is destroyed only after the hb_font_t font object has been destroyed.

Parameters:

ftFace - FT_Face to work upon

destroy - A callback to call when the font object is not needed anymore

Returns:

the new hb_font_t font object

ftFontCreateReferenced

public static Font ftFontCreateReferenced(org.freedesktop.freetype.Face ftFace)

Creates an hb_font_t font object from the specified FT_Face.

<note>Note: You must set the face size on ftFace before calling hb_ft_font_create_referenced() on it. HarfBuzz assumes size is always set and will access size member of FT_Face unconditionally.</note>

This is the preferred variant of the hb_ft_font_create* function family, because it calls FT_Reference_Face() on ftFace, ensuring that ftFace remains alive as long as the resulting hb_font_t font object remains alive.

Use this version unless you know you have good reasons not to.

Parameters:

ftFace - FT_Face to work upon

Returns:

the new hb_font_t font object

ftFontGetFace

public static org.freedesktop.freetype.Face ftFontGetFace(Font font)

Fetches the FT_Face associated with the specified hb_font_t font object.

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Parameters:

font - hb_font_t to work upon

Returns:

the FT_Face found or NULL

ftFontGetLoadFlags

public static int ftFontGetLoadFlags(Font font)

Fetches the FT_Load_Glyph load flags of the specified hb_font_t.

For more information, see <https://freetype.org/freetype2/docs/reference/ft2-glyph_retrieval.htmlft_load_xxx>

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Parameters:

font - hb_font_t to work upon

Returns:

FT_Load_Glyph flags found, or 0

ftFontLockFace

public static org.freedesktop.freetype.Face ftFontLockFace(Font font)

Gets the FT_Face associated with font.

This face will be kept around and access to the FT_Face object from other HarfBuzz API wil be blocked until you call hb_ft_font_unlock_face().

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Parameters:

font - hb_font_t to work upon

Returns:

the FT_Face associated with font or NULL

ftFontSetFuncs

public static void ftFontSetFuncs(Font font)

Configures the font-functions structure of the specified hb_font_t font object to use FreeType font functions.

In particular, you can use this function to configure an existing hb_face_t face object for use with FreeType font functions even if that hb_face_t face object was initially created with hb_face_create(), and therefore was not initially configured to use FreeType font functions.

An hb_font_t object created with hb_ft_font_create() is preconfigured for FreeType font functions and does not require this function to be used.

Note that if you modify the underlying hb_font_t after calling this function, you need to call hb_ft_hb_font_changed() to update the underlying FT_Face.

<note>Note: Internally, this function creates an FT_Face. </note>

Parameters:

font - hb_font_t to work upon

ftFontSetLoadFlags

public static void ftFontSetLoadFlags(Font font,
 int loadFlags)

Sets the FT_Load_Glyph load flags for the specified hb_font_t.

For more information, see <https://freetype.org/freetype2/docs/reference/ft2-glyph_retrieval.htmlft_load_xxx>

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Parameters:

font - hb_font_t to work upon

loadFlags - The FreeType load flags to set

ftFontUnlockFace

public static void ftFontUnlockFace(Font font)

Releases an FT_Face previously obtained with hb_ft_font_lock_face().

Parameters:

font - hb_font_t to work upon

ftHbFontChanged

public static Bool ftHbFontChanged(Font font)

Refreshes the state of the underlying FT_Face of font when the hb_font_t font has changed. This function should be called after changing the size or variation-axis settings on the font. This call is fast if nothing has changed on font.

Parameters:

font - hb_font_t to work upon

Returns:

true if changed, false otherwise

glibBlobCreate

public static Blob glibBlobCreate(Bytes gbytes)

Creates an hb_blob_t blob from the specified GBytes data structure.

Parameters:

gbytes - the GBytes structure to work upon

Returns:

the new hb_blob_t blob object

glibGetUnicodeFuncs

public static UnicodeFuncs glibGetUnicodeFuncs()

Fetches a Unicode-functions structure that is populated with the appropriate GLib function for each method.

Returns:

a pointer to the hb_unicode_funcs_t Unicode-functions structure

glibScriptFromScript

public static UnicodeScript glibScriptFromScript(Script script)

Fetches the GUnicodeScript identifier that corresponds to the specified hb_script_t script.

Parameters:

script - The hb_script_t to query

Returns:

the GUnicodeScript identifier found

glibScriptToScript

public static Script glibScriptToScript(UnicodeScript script)

Fetches the hb_script_t script that corresponds to the specified GUnicodeScript identifier.

Parameters:

script - The GUnicodeScript identifier to query

Returns:

the hb_script_t script found

glyphInfoGetGlyphFlags

public static Set<GlyphFlags> glyphInfoGetGlyphFlags(GlyphInfo info)

Returns glyph flags encoded within a hb_glyph_info_t.

Parameters:

info - a hb_glyph_info_t

Returns:

The hb_glyph_flags_t encoded within info

languageFromString

public static Language languageFromString(byte[] str)

Converts str representing a BCP 47 language tag to the corresponding hb_language_t.

Parameters:

str - a string representing a BCP 47 language tag

Returns:

The hb_language_t corresponding to the BCP 47 language tag.

languageGetDefault

public static Language languageGetDefault()

Fetch the default language from current locale.

<note>Note that the first time this function is called, it calls "setlocale (LC_CTYPE, nullptr)" to fetch current locale. The underlying setlocale function is, in many implementations, NOT threadsafe. To avoid problems, call this function once before multiple threads can call it. This function is only used from hb_buffer_guess_segment_properties() by HarfBuzz itself.</note>

Returns:

The default language of the locale as an hb_language_t

languageMatches

public static Bool languageMatches(Language language,
 Language specific)

Check whether a second language tag is the same or a more specific version of the provided language tag. For example, "fa_IR.utf8" is a more specific tag for "fa" or for "fa_IR".

Parameters:

language - The hb_language_t to work on

specific - Another hb_language_t

Returns:

true if languages match, false otherwise.

languageToString

public static String languageToString(Language language)

Converts an hb_language_t to a string.

Parameters:

language - The hb_language_t to convert

Returns:

A NULL-terminated string representing the language. Must not be freed by the caller.

mapAllocationSuccessful

public static Bool mapAllocationSuccessful(Map map)

Tests whether memory allocation for a set was successful.

Parameters:

map - A map

Returns:

true if allocation succeeded, false otherwise

mapClear

public static void mapClear(Map map)

Clears out the contents of map.

Parameters:

map - A map

mapCopy

public static Map mapCopy(Map map)

Allocate a copy of map.

Parameters:

map - A map

Returns:

Newly-allocated map.

mapCreate

public static Map mapCreate()

Creates a new, initially empty map.

Returns:

The new hb_map_t

mapDel

public static void mapDel(Map map,
 Codepoint key)

Removes key and its stored value from map.

Parameters:

map - A map

key - The key to delete

mapDestroy

public static void mapDestroy(Map map)

Decreases the reference count on a map. When the reference count reaches zero, the map is destroyed, freeing all memory.

Parameters:

map - A map

mapGet

public static Codepoint mapGet(Map map,
 Codepoint key)

Fetches the value stored for key in map.

Parameters:

map - A map

key - The key to query

mapGetEmpty

public static Map mapGetEmpty()

Fetches the singleton empty hb_map_t.

Returns:

The empty hb_map_t

mapGetPopulation

public static int mapGetPopulation(Map map)

Returns the number of key-value pairs in the map.

Parameters:

map - A map

Returns:

The population of map

mapGetUserData

public static MemorySegment mapGetUserData(Map map,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified map.

Parameters:

map - A map

key - The user-data key to query

Returns:

A pointer to the user data

mapHas

public static Bool mapHas(Map map,
 Codepoint key)

Tests whether key is an element of map.

Parameters:

map - A map

key - The key to query

Returns:

true if key is found in map, false otherwise

mapHash

public static int mapHash(Map map)

Creates a hash representing map.

Parameters:

map - A map

Returns:

A hash of map.

mapIsEmpty

public static Bool mapIsEmpty(Map map)

Tests whether map is empty (contains no elements).

Parameters:

map - A map

Returns:

true if map is empty

mapIsEqual

public static Bool mapIsEqual(Map map,
 Map other)

Tests whether map and other are equal (contain the same elements).

Parameters:

map - A map

other - Another map

Returns:

true if the two maps are equal, false otherwise.

mapKeys

public static void mapKeys(Map map,
 Set keys)

Add the keys of map to keys.

Parameters:

map - A map

keys - A set

mapNext

public static Bool mapNext(Map map,
 Out<Integer> idx,
 Codepoint key,
 Codepoint value)

Fetches the next key/value pair in map.

Set idx to -1 to get started.

If the map is modified during iteration, the behavior is undefined.

The order in which the key/values are returned is undefined.

Parameters:

map - A map

idx - Iterator internal state

key - Key retrieved

value - Value retrieved

Returns:

true if there was a next value, false otherwise

mapReference

public static Map mapReference(Map map)

Increases the reference count on a map.

Parameters:

map - A map

Returns:

The map

mapSet

public static void mapSet(Map map,
 Codepoint key,
 Codepoint value)

Stores key:value in the map.

Parameters:

map - A map

key - The key to store in the map

value - The value to store for key

mapSetUserData

public static Bool mapSetUserData(Map map,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified map.

Parameters:

map - A map

key - The user-data key to set

data - A pointer to the user data to set

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

mapUpdate

public static void mapUpdate(Map map,
 Map other)

Add the contents of other to map.

Parameters:

map - A map

other - Another map

mapValues

public static void mapValues(Map map,
 Set values)

Add the values of map to values.

Parameters:

map - A map

values - A set

otColorGlyphGetLayers

public static int otColorGlyphGetLayers(Face face,
 Codepoint glyph,
 int startOffset,
 @Nullable
 @Nullable Out<OtColorLayer[]> layers)

Fetches a list of all color layers for the specified glyph index in the specified face. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

glyph - The glyph index to query

startOffset - offset of the first layer to retrieve

layers - The array of layers found

Returns:

Total number of layers available for the glyph index queried

otColorGlyphHasPaint

public static Bool otColorGlyphHasPaint(Face face,
 Codepoint glyph)

Tests where a face includes COLRv1 paint data for glyph.

Parameters:

face - hb_face_t to work upon

glyph - The glyph index to query

Returns:

true if data found, false otherwise

otColorGlyphReferencePng

public static Blob otColorGlyphReferencePng(Font font,
 Codepoint glyph)

Fetches the PNG image for a glyph. This function takes a font object, not a face object, as input. To get an optimally sized PNG blob, the PPEM values must be set on the font object. If PPEM is unset, the blob returned will be the largest PNG available.

If the glyph has no PNG image, the singleton empty blob is returned.

Parameters:

font - hb_font_t to work upon

glyph - a glyph index

Returns:

An hb_blob_t containing the PNG image for the glyph, if available

otColorGlyphReferenceSvg

public static Blob otColorGlyphReferenceSvg(Face face,
 Codepoint glyph)

Fetches the SVG document for a glyph. The blob may be either plain text or gzip-encoded.

If the glyph has no SVG document, the singleton empty blob is returned.

Parameters:

face - hb_face_t to work upon

glyph - a svg glyph index

Returns:

An hb_blob_t containing the SVG document of the glyph, if available

otColorHasLayers

public static Bool otColorHasLayers(Face face)

Tests whether a face includes a COLR table with data according to COLRv0.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otColorHasPaint

public static Bool otColorHasPaint(Face face)

Tests where a face includes a COLR table with data according to COLRv1.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otColorHasPalettes

public static Bool otColorHasPalettes(Face face)

Tests whether a face includes a CPAL color-palette table.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otColorHasPng

public static Bool otColorHasPng(Face face)

Tests whether a face has PNG glyph images (either in CBDT or sbix tables).

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otColorHasSvg

public static Bool otColorHasSvg(Face face)

Tests whether a face includes any SVG glyph images.

Parameters:

face - hb_face_t to work upon.

Returns:

true if data found, false otherwise.

otColorPaletteColorGetNameId

public static OtNameId otColorPaletteColorGetNameId(Face face,
 int colorIndex)

Fetches the name table Name ID that provides display names for the specified color in a face's CPAL color palette.

Display names can be generic (e.g., "Background") or specific (e.g., "Eye color").

Parameters:

face - hb_face_t to work upon

colorIndex - The index of the color

Returns:

the Name ID found for the color.

otColorPaletteGetColors

public static int otColorPaletteGetColors(Face face,
 int paletteIndex,
 int startOffset,
 @Nullable
 @Nullable Out<Color[]> colors)

Fetches a list of the colors in a color palette.

After calling this function, colors will be filled with the palette colors. If colors is NULL, the function will just return the number of total colors without storing any actual colors; this can be used for allocating a buffer of suitable size before calling hb_ot_color_palette_get_colors() a second time.

The RGBA values in the palette are unpremultiplied. See the OpenType spec CPAL section for details.

Parameters:

face - hb_face_t to work upon

paletteIndex - the index of the color palette to query

startOffset - offset of the first color to retrieve

colors - The array of hb_color_t records found

Returns:

the total number of colors in the palette

otColorPaletteGetCount

public static int otColorPaletteGetCount(Face face)

Fetches the number of color palettes in a face.

Parameters:

face - hb_face_t to work upon

Returns:

the number of palettes found

otColorPaletteGetFlags

public static Set<OtColorPaletteFlags> otColorPaletteGetFlags(Face face,
 int paletteIndex)

Fetches the flags defined for a color palette.

Parameters:

face - hb_face_t to work upon

paletteIndex - The index of the color palette

Returns:

the hb_ot_color_palette_flags_t of the requested color palette

otColorPaletteGetNameId

public static OtNameId otColorPaletteGetNameId(Face face,
 int paletteIndex)

Fetches the name table Name ID that provides display names for a CPAL color palette.

Palette display names can be generic (e.g., "Default") or provide specific, themed names (e.g., "Spring", "Summer", "Fall", and "Winter").

Parameters:

face - hb_face_t to work upon

paletteIndex - The index of the color palette

Returns:

the Named ID found for the palette. If the requested palette has no name the result is HB_OT_NAME_ID_INVALID.

otFontSetFuncs

public static void otFontSetFuncs(Font font)

Sets the font functions to use when working with font.

Parameters:

font - hb_font_t to work upon

otLayoutCollectFeatures

public static void otLayoutCollectFeatures(Face face,
 Tag tableTag,
 @Nullable
 @Nullable Tag[] scripts,
 @Nullable
 @Nullable Tag[] languages,
 @Nullable
 @Nullable Tag[] features,
 Set featureIndexes)

Fetches a list of all feature indexes in the specified face's GSUB table or GPOS table, underneath the specified scripts, languages, and features. If no list of scripts is provided, all scripts will be queried. If no list of languages is provided, all languages will be queried. If no list of features is provided, all features will be queried.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scripts - The array of scripts to collect features for, terminated by HB_TAG_NONE

languages - The array of languages to collect features for, terminated by HB_TAG_NONE

features - The array of features to collect, terminated by HB_TAG_NONE

featureIndexes - The set of feature indexes found for the query

otLayoutCollectFeaturesMap

public static void otLayoutCollectFeaturesMap(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 Map featureMap)

Fetches the mapping from feature tags to feature indexes for the specified script and language.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

featureMap - The map of feature tag to feature index.

otLayoutCollectLookups

public static void otLayoutCollectLookups(Face face,
 Tag tableTag,
 @Nullable
 @Nullable Tag[] scripts,
 @Nullable
 @Nullable Tag[] languages,
 @Nullable
 @Nullable Tag[] features,
 Set lookupIndexes)

Fetches a list of all feature-lookup indexes in the specified face's GSUB table or GPOS table, underneath the specified scripts, languages, and features. If no list of scripts is provided, all scripts will be queried. If no list of languages is provided, all languages will be queried. If no list of features is provided, all features will be queried.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scripts - The array of scripts to collect lookups for, terminated by HB_TAG_NONE

languages - The array of languages to collect lookups for, terminated by HB_TAG_NONE

features - The array of features to collect lookups for, terminated by HB_TAG_NONE

lookupIndexes - The array of lookup indexes found for the query

otLayoutFeatureGetCharacters

public static int otLayoutFeatureGetCharacters(Face face,
 Tag tableTag,
 int featureIndex,
 int startOffset,
 Out<Codepoint[]> characters)

Fetches a list of the characters defined as having a variant under the specified "Character Variant" ("cvXX") feature tag.

Parameters:

face - hb_face_t to work upon

tableTag - table tag to query, "GSUB" or "GPOS".

featureIndex - index of feature to query.

startOffset - offset of the first character to retrieve

characters - A buffer pointer. The Unicode codepoints of the characters for which this feature provides glyph variants.

Returns:

Number of total sample characters in the cvXX feature.

otLayoutFeatureGetLookups

public static int otLayoutFeatureGetLookups(Face face,
 Tag tableTag,
 int featureIndex,
 int startOffset,
 Out<int[]> lookupIndexes)

Fetches a list of all lookups enumerated for the specified feature, in the specified face's GSUB table or GPOS table. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

featureIndex - The index of the requested feature

startOffset - offset of the first lookup to retrieve

lookupIndexes - The array of lookup indexes found for the query

Returns:

Total number of lookups.

otLayoutFeatureGetNameIds

public static Bool otLayoutFeatureGetNameIds(Face face,
 Tag tableTag,
 int featureIndex,
 @Nullable
 @Nullable OtNameId labelId,
 @Nullable
 @Nullable OtNameId tooltipId,
 @Nullable
 @Nullable OtNameId sampleId,
 @Nullable
 @Nullable Out<Integer> numNamedParameters,
 @Nullable
 @Nullable OtNameId firstParamId)

Fetches name indices from feature parameters for "Stylistic Set" ('ssXX') or "Character Variant" ('cvXX') features.

Parameters:

face - hb_face_t to work upon

tableTag - table tag to query, "GSUB" or "GPOS".

featureIndex - index of feature to query.

labelId - The ‘name’ table name ID that specifies a string for a user-interface label for this feature. (May be NULL.)

tooltipId - The ‘name’ table name ID that specifies a string that an application can use for tooltip text for this feature. (May be NULL.)

sampleId - The ‘name’ table name ID that specifies sample text that illustrates the effect of this feature. (May be NULL.)

numNamedParameters - Number of named parameters. (May be zero.)

firstParamId - The first ‘name’ table name ID used to specify strings for user-interface labels for the feature parameters. (Must be zero if numParameters is zero.)

Returns:

true if data found, false otherwise

otLayoutFeatureWithVariationsGetLookups

public static int otLayoutFeatureWithVariationsGetLookups(Face face,
 Tag tableTag,
 int featureIndex,
 int variationsIndex,
 int startOffset,
 Out<int[]> lookupIndexes)

Fetches a list of all lookups enumerated for the specified feature, in the specified face's GSUB table or GPOS table, enabled at the specified variations index. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

featureIndex - The index of the feature to query

variationsIndex - The index of the feature variation to query

startOffset - offset of the first lookup to retrieve

lookupIndexes - The array of lookups found for the query

Returns:

Total number of lookups.

otLayoutGetAttachPoints

public static int otLayoutGetAttachPoints(Face face,
 Codepoint glyph,
 int startOffset,
 Out<int[]> pointArray)

Fetches a list of all attachment points for the specified glyph in the GDEF table of the face. The list returned will begin at the offset provided.

Useful if the client program wishes to cache the list.

Parameters:

face - The hb_face_t to work on

glyph - The hb_codepoint_t code point to query

startOffset - offset of the first attachment point to retrieve

pointArray - The array of attachment points found for the query

Returns:

Total number of attachment points for glyph.

otLayoutGetBaseline

public static Bool otLayoutGetBaseline(Font font,
 OtLayoutBaselineTag baselineTag,
 Direction direction,
 Tag scriptTag,
 Tag languageTag,
 @Nullable
 @Nullable Position coord)

Fetches a baseline value from the face.

Parameters:

font - a font

baselineTag - a baseline tag

direction - text direction.

scriptTag - script tag.

languageTag - language tag, currently unused.

coord - baseline value if found.

Returns:

true if found baseline value in the font.

otLayoutGetBaseline2

public static Bool otLayoutGetBaseline2(Font font,
 OtLayoutBaselineTag baselineTag,
 Direction direction,
 Script script,
 @Nullable
 @Nullable Language language,
 @Nullable
 @Nullable Position coord)

Fetches a baseline value from the face.

This function is like hb_ot_layout_get_baseline() but takes hb_script_t and hb_language_t instead of OpenType hb_tag_t.

Parameters:

font - a font

baselineTag - a baseline tag

direction - text direction.

script - script.

language - language, currently unused.

coord - baseline value if found.

Returns:

true if found baseline value in the font.

otLayoutGetBaselineWithFallback

public static void otLayoutGetBaselineWithFallback(Font font,
 OtLayoutBaselineTag baselineTag,
 Direction direction,
 Tag scriptTag,
 Tag languageTag,
 Position coord)

Fetches a baseline value from the face, and synthesizes it if the font does not have it.

Parameters:

font - a font

baselineTag - a baseline tag

direction - text direction.

scriptTag - script tag.

languageTag - language tag, currently unused.

coord - baseline value if found.

otLayoutGetBaselineWithFallback2

public static void otLayoutGetBaselineWithFallback2(Font font,
 OtLayoutBaselineTag baselineTag,
 Direction direction,
 Script script,
 @Nullable
 @Nullable Language language,
 Position coord)

Fetches a baseline value from the face, and synthesizes it if the font does not have it.

This function is like hb_ot_layout_get_baseline_with_fallback() but takes hb_script_t and hb_language_t instead of OpenType hb_tag_t.

Parameters:

font - a font

baselineTag - a baseline tag

direction - text direction.

script - script.

language - language, currently unused.

coord - baseline value if found.

otLayoutGetFontExtents

public static Bool otLayoutGetFontExtents(Font font,
 Direction direction,
 Tag scriptTag,
 Tag languageTag,
 @Nullable
 @Nullable FontExtents extents)

Fetches script/language-specific font extents. These values are looked up in the BASE table's MinMax records.

If no such extents are found, the default extents for the font are fetched. As such, the return value of this function can for the most part be ignored. Note that the per-script/language extents do not have a line-gap value, and the line-gap is set to zero in that case.

Parameters:

font - a font

direction - text direction.

scriptTag - script tag.

languageTag - language tag.

extents - font extents if found.

Returns:

true if found script/language-specific font extents.

otLayoutGetFontExtents2

public static Bool otLayoutGetFontExtents2(Font font,
 Direction direction,
 Script script,
 @Nullable
 @Nullable Language language,
 @Nullable
 @Nullable FontExtents extents)

Fetches script/language-specific font extents. These values are looked up in the BASE table's MinMax records.

If no such extents are found, the default extents for the font are fetched. As such, the return value of this function can for the most part be ignored. Note that the per-script/language extents do not have a line-gap value, and the line-gap is set to zero in that case.

This function is like hb_ot_layout_get_font_extents() but takes hb_script_t and hb_language_t instead of OpenType hb_tag_t.

Parameters:

font - a font

direction - text direction.

script - script.

language - language.

extents - font extents if found.

Returns:

true if found script/language-specific font extents.

otLayoutGetGlyphClass

public static OtLayoutGlyphClass otLayoutGetGlyphClass(Face face,
 Codepoint glyph)

Fetches the GDEF class of the requested glyph in the specified face.

Parameters:

face - The hb_face_t to work on

glyph - The hb_codepoint_t code point to query

Returns:

The hb_ot_layout_glyph_class_t glyph class of the given code point in the GDEF table of the face.

otLayoutGetGlyphsInClass

public static void otLayoutGetGlyphsInClass(Face face,
 OtLayoutGlyphClass klass,
 Set glyphs)

Retrieves the set of all glyphs from the face that belong to the requested glyph class in the face's GDEF table.

Parameters:

face - The hb_face_t to work on

klass - The hb_ot_layout_glyph_class_t GDEF class to retrieve

glyphs - The hb_set_t set of all glyphs belonging to the requested class.

otLayoutGetHorizontalBaselineTagForScript

public static OtLayoutBaselineTag otLayoutGetHorizontalBaselineTagForScript(Script script)

Fetches the dominant horizontal baseline tag used by script.

Parameters:

script - a script tag.

Returns:

dominant baseline tag for the script.

otLayoutGetLigatureCarets

public static int otLayoutGetLigatureCarets(Font font,
 Direction direction,
 Codepoint glyph,
 int startOffset,
 Out<Position[]> caretArray)

Fetches a list of the caret positions defined for a ligature glyph in the GDEF table of the font. The list returned will begin at the offset provided.

Note that a ligature that is formed from n characters will have n-1 caret positions. The first character is not represented in the array, since its caret position is the glyph position.

The positions returned by this function are 'unshaped', and will have to be fixed up for kerning that may be applied to the ligature glyph.

Parameters:

font - The hb_font_t to work on

direction - The hb_direction_t text direction to use

glyph - The hb_codepoint_t code point to query

startOffset - offset of the first caret position to retrieve

caretArray - The array of caret positions found for the query

Returns:

Total number of ligature caret positions for glyph.

otLayoutGetSizeParams

public static Bool otLayoutGetSizeParams(Face face,
 Out<Integer> designSize,
 Out<Integer> subfamilyId,
 OtNameId subfamilyNameId,
 Out<Integer> rangeStart,
 Out<Integer> rangeEnd)

Fetches optical-size feature data (i.e., the size feature from GPOS). Note that the subfamily_id and the subfamily name string (accessible via the subfamily_name_id) as used here are defined as pertaining only to fonts within a font family that differ specifically in their respective size ranges; other ways to differentiate fonts within a subfamily are not covered by the size feature.

For more information on this distinction, see the [size feature documentation]( https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt

invalid @link

{@link .org.freedesktop.harfbuzz.Tag

}-size).

Parameters:

face - hb_face_t to work upon

designSize - The design size of the face

subfamilyId - The identifier of the face within the font subfamily

subfamilyNameId - The ‘name’ table name ID of the face within the font subfamily

rangeStart - The minimum size of the recommended size range for the face

rangeEnd - The maximum size of the recommended size range for the face

Returns:

true if data found, false otherwise

otLayoutHasGlyphClasses

public static Bool otLayoutHasGlyphClasses(Face face)

Tests whether a face has any glyph classes defined in its GDEF table.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otLayoutHasPositioning

public static Bool otLayoutHasPositioning(Face face)

Tests whether the specified face includes any GPOS positioning.

Parameters:

face - hb_face_t to work upon

Returns:

true if the face has GPOS data, false otherwise

otLayoutHasSubstitution

public static Bool otLayoutHasSubstitution(Face face)

Tests whether the specified face includes any GSUB substitutions.

Parameters:

face - hb_face_t to work upon

Returns:

true if data found, false otherwise

otLayoutLanguageFindFeature

public static Bool otLayoutLanguageFindFeature(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 Tag featureTag,
 Out<Integer> featureIndex)

Fetches the index of a given feature tag in the specified face's GSUB table or GPOS table, underneath the specified script and language.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

featureTag - hb_tag_t of the feature tag requested

featureIndex - The index of the requested feature

Returns:

true if the feature is found, false otherwise

otLayoutLanguageGetFeatureIndexes

public static int otLayoutLanguageGetFeatureIndexes(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 int startOffset,
 Out<int[]> featureIndexes)

Fetches a list of all features in the specified face's GSUB table or GPOS table, underneath the specified script and language. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

startOffset - offset of the first feature tag to retrieve

featureIndexes - The array of feature indexes found for the query

Returns:

Total number of features.

otLayoutLanguageGetFeatureTags

public static int otLayoutLanguageGetFeatureTags(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 int startOffset,
 Out<Tag[]> featureTags)

Fetches a list of all features in the specified face's GSUB table or GPOS table, underneath the specified script and language. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

startOffset - offset of the first feature tag to retrieve

featureTags - The array of hb_tag_t feature tags found for the query

Returns:

Total number of feature tags.

otLayoutLanguageGetRequiredFeature

public static Bool otLayoutLanguageGetRequiredFeature(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 Out<Integer> featureIndex,
 Tag featureTag)

Fetches the tag of a requested feature index in the given face's GSUB or GPOS table, underneath the specified script and language.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

featureIndex - The index of the requested feature

featureTag - The hb_tag_t of the requested feature

Returns:

true if the feature is found, false otherwise

otLayoutLanguageGetRequiredFeatureIndex

public static Bool otLayoutLanguageGetRequiredFeatureIndex(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageIndex,
 Out<Integer> featureIndex)

Fetches the index of a requested feature in the given face's GSUB or GPOS table, underneath the specified script and language.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageIndex - The index of the requested language tag

featureIndex - The index of the requested feature

Returns:

true if the feature is found, false otherwise

otLayoutLookupCollectGlyphs

public static void otLayoutLookupCollectGlyphs(Face face,
 Tag tableTag,
 int lookupIndex,
 Set glyphsBefore,
 Set glyphsInput,
 Set glyphsAfter,
 Set glyphsOutput)

Fetches a list of all glyphs affected by the specified lookup in the specified face's GSUB table or GPOS table.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

lookupIndex - The index of the feature lookup to query

glyphsBefore - Array of glyphs preceding the substitution range

glyphsInput - Array of input glyphs that would be substituted by the lookup

glyphsAfter - Array of glyphs following the substitution range

glyphsOutput - Array of glyphs that would be the substituted output of the lookup

otLayoutLookupGetGlyphAlternates

public static int otLayoutLookupGetGlyphAlternates(Face face,
 int lookupIndex,
 Codepoint glyph,
 int startOffset,
 Out<Codepoint[]> alternateGlyphs)

Fetches alternates of a glyph from a given GSUB lookup index.

Parameters:

face - a face.

lookupIndex - index of the feature lookup to query.

glyph - a glyph id.

startOffset - starting offset.

alternateGlyphs - A glyphs buffer. Alternate glyphs associated with the glyph id.

Returns:

Total number of alternates found in the specific lookup index for the given glyph id.

otLayoutLookupGetOpticalBound

public static Position otLayoutLookupGetOpticalBound(Font font,
 int lookupIndex,
 Direction direction,
 Codepoint glyph)

Fetches the optical bound of a glyph positioned at the margin of text. The direction identifies which edge of the glyph to query.

Parameters:

font - a font.

lookupIndex - index of the feature lookup to query.

direction - edge of the glyph to query.

glyph - a glyph id.

Returns:

Adjustment value. Negative values mean the glyph will stick out of the margin.

otLayoutLookupSubstituteClosure

public static void otLayoutLookupSubstituteClosure(Face face,
 int lookupIndex,
 Set glyphs)

Compute the transitive closure of glyphs needed for a specified lookup.

Parameters:

face - hb_face_t to work upon

lookupIndex - index of the feature lookup to query

glyphs - Array of glyphs comprising the transitive closure of the lookup

otLayoutLookupWouldSubstitute

public static Bool otLayoutLookupWouldSubstitute(Face face,
 int lookupIndex,
 Codepoint glyphs,
 int glyphsLength,
 Bool zeroContext)

Tests whether a specified lookup in the specified face would trigger a substitution on the given glyph sequence.

Parameters:

face - hb_face_t to work upon

lookupIndex - The index of the lookup to query

glyphs - The sequence of glyphs to query for substitution

glyphsLength - The length of the glyph sequence

zeroContext - hb_bool_t indicating whether pre-/post-context are disallowed in substitutions

Returns:

true if a substitution would be triggered, false otherwise

otLayoutLookupsSubstituteClosure

public static void otLayoutLookupsSubstituteClosure(Face face,
 Set lookups,
 Set glyphs)

Compute the transitive closure of glyphs needed for all of the provided lookups.

Parameters:

face - hb_face_t to work upon

lookups - The set of lookups to query

glyphs - Array of glyphs comprising the transitive closure of the lookups

otLayoutScriptFindLanguage

@Deprecated
public static Bool otLayoutScriptFindLanguage(Face face,
 Tag tableTag,
 int scriptIndex,
 Tag languageTag,
 MemorySegment languageIndex)

Deprecated.

Fetches the index of a given language tag in the specified face's GSUB table or GPOS table, underneath the specified script tag.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageTag - The hb_tag_t of the requested language

languageIndex - The index of the requested language

Returns:

true if the language tag is found, false otherwise

otLayoutScriptGetLanguageTags

public static int otLayoutScriptGetLanguageTags(Face face,
 Tag tableTag,
 int scriptIndex,
 int startOffset,
 Out<Tag[]> languageTags)

Fetches a list of language tags in the given face's GSUB or GPOS table, underneath the specified script index. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

startOffset - offset of the first language tag to retrieve

languageTags - Array of language tags found in the table

Returns:

Total number of language tags.

otLayoutScriptSelectLanguage

public static Bool otLayoutScriptSelectLanguage(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageCount,
 Tag languageTags,
 Out<Integer> languageIndex)

Fetches the index of the first language tag fom languageTags that is present in the specified face's GSUB or GPOS table, underneath the specified script index.

If none of the given language tags is found, false is returned and languageIndex is set to the default language index.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageCount - The number of languages in the specified script

languageTags - The array of language tags

languageIndex - The index of the requested language

Returns:

true if one of the given language tags is found, false otherwise

otLayoutScriptSelectLanguage2

public static Bool otLayoutScriptSelectLanguage2(Face face,
 Tag tableTag,
 int scriptIndex,
 int languageCount,
 Tag languageTags,
 Out<Integer> languageIndex,
 Tag chosenLanguage)

Fetches the index of the first language tag fom languageTags that is present in the specified face's GSUB or GPOS table, underneath the specified script index.

If none of the given language tags is found, false is returned and languageIndex is set to HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX and chosenLanguage is set to HB_TAG_NONE.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptIndex - The index of the requested script tag

languageCount - The number of languages in the specified script

languageTags - The array of language tags

languageIndex - The index of the chosen language

chosenLanguage - hb_tag_t of the chosen language

Returns:

true if one of the given language tags is found, false otherwise

otLayoutTableChooseScript

public static Bool otLayoutTableChooseScript(Face face,
 Tag tableTag,
 Tag scriptTags,
 Out<Integer> scriptIndex,
 Tag chosenScript)

Deprecated since 2.0.0

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptTags - Array of hb_tag_t script tags

scriptIndex - The index of the chosen script

chosenScript - hb_tag_t of the chosen script

otLayoutTableFindFeatureVariations

public static Bool otLayoutTableFindFeatureVariations(Face face,
 Tag tableTag,
 MemorySegment coords,
 int numCoords,
 Out<Integer> variationsIndex)

Fetches a list of feature variations in the specified face's GSUB table or GPOS table, at the specified variation coordinates.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

coords - The variation coordinates to query

numCoords - The number of variation coordinates

variationsIndex - The array of feature variations found for the query

Returns:

true if feature variations were found, false otherwise.

otLayoutTableFindScript

public static Bool otLayoutTableFindScript(Face face,
 Tag tableTag,
 Tag scriptTag,
 Out<Integer> scriptIndex)

Fetches the index if a given script tag in the specified face's GSUB table or GPOS table.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptTag - hb_tag_t of the script tag requested

scriptIndex - The index of the requested script tag

Returns:

true if the script is found, false otherwise

otLayoutTableGetFeatureTags

public static int otLayoutTableGetFeatureTags(Face face,
 Tag tableTag,
 int startOffset,
 Out<Tag[]> featureTags)

Fetches a list of all feature tags in the given face's GSUB or GPOS table. Note that there might be duplicate feature tags, belonging to different script/language-system pairs of the table.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

startOffset - offset of the first feature tag to retrieve

featureTags - Array of feature tags found in the table

Returns:

Total number of feature tags.

otLayoutTableGetLookupCount

public static int otLayoutTableGetLookupCount(Face face,
 Tag tableTag)

Fetches the total number of lookups enumerated in the specified face's GSUB table or GPOS table.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

Returns:

Total number of lookups.

otLayoutTableGetScriptTags

public static int otLayoutTableGetScriptTags(Face face,
 Tag tableTag,
 int startOffset,
 Out<Tag[]> scriptTags)

Fetches a list of all scripts enumerated in the specified face's GSUB table or GPOS table. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

startOffset - offset of the first script tag to retrieve

scriptTags - The array of hb_tag_t script tags found for the query

Returns:

Total number of script tags.

otLayoutTableSelectScript

public static Bool otLayoutTableSelectScript(Face face,
 Tag tableTag,
 int scriptCount,
 Tag scriptTags,
 @Nullable
 @Nullable Out<Integer> scriptIndex,
 @Nullable
 @Nullable Tag chosenScript)

Selects an OpenType script for tableTag from the scriptTags array.

If the table does not have any of the requested scripts, then DFLT, dflt, and latn tags are tried in that order. If the table still does not have any of these scripts, scriptIndex is set to HB_OT_LAYOUT_NO_SCRIPT_INDEX and chosenScript is set to HB_TAG_NONE.

Parameters:

face - hb_face_t to work upon

tableTag - HB_OT_TAG_GSUB or HB_OT_TAG_GPOS

scriptCount - Number of script tags in the array

scriptTags - Array of hb_tag_t script tags

scriptIndex - The index of the requested script

chosenScript - hb_tag_t of the requested script

Returns:

true if one of the requested scripts is selected, false if a fallback script is selected or if no scripts are selected.

otMathGetConstant

public static Position otMathGetConstant(Font font,
 OtMathConstant constant)

Fetches the specified math constant. For most constants, the value returned is an hb_position_t.

However, if the requested constant is HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN, HB_OT_MATH_CONSTANT_SCRIPT_SCRIPT_PERCENT_SCALE_DOWN or HB_OT_MATH_CONSTANT_RADICAL_DEGREE_BOTTOM_RAISE_PERCENT, then the return value is an integer between 0 and 100 representing that percentage.

Parameters:

font - hb_font_t to work upon

constant - hb_ot_math_constant_t the constant to retrieve

Returns:

the requested constant or zero

otMathGetGlyphAssembly

public static int otMathGetGlyphAssembly(Font font,
 Codepoint glyph,
 Direction direction,
 int startOffset,
 Out<OtMathGlyphPart[]> parts,
 Position italicsCorrection)

Fetches the GlyphAssembly for the specified font, glyph index, and direction. Returned are a list of hb_ot_math_glyph_part_t glyph parts that can be used to draw the glyph and an italics-correction value (if one is defined in the font).

<note>The direction parameter is only used to select between horizontal or vertical directions for the construction. Even though all hb_direction_t values are accepted, only the result of HB_DIRECTION_IS_HORIZONTAL is considered.</note>

Parameters:

font - hb_font_t to work upon

glyph - The index of the glyph to stretch

direction - direction of the stretching (horizontal or vertical)

startOffset - offset of the first glyph part to retrieve

parts - the glyph parts returned

italicsCorrection - italics correction of the glyph assembly

Returns:

the total number of parts in the glyph assembly

otMathGetGlyphItalicsCorrection

public static Position otMathGetGlyphItalicsCorrection(Font font,
 Codepoint glyph)

Fetches an italics-correction value (if one exists) for the specified glyph index.

Parameters:

font - hb_font_t to work upon

glyph - The glyph index from which to retrieve the value

Returns:

the italics correction of the glyph or zero

otMathGetGlyphKerning

public static Position otMathGetGlyphKerning(Font font,
 Codepoint glyph,
 OtMathKern kern,
 Position correctionHeight)

Fetches the math kerning (cut-ins) value for the specified font, glyph index, and kern.

If the MathKern table is found, the function examines it to find a height value that is greater or equal to correctionHeight. If such a height value is found, corresponding kerning value from the table is returned. If no such height value is found, the last kerning value is returned.

Parameters:

font - hb_font_t to work upon

glyph - The glyph index from which to retrieve the value

kern - The hb_ot_math_kern_t from which to retrieve the value

correctionHeight - the correction height to use to determine the kerning.

Returns:

requested kerning value or zero

otMathGetGlyphKernings

public static int otMathGetGlyphKernings(Font font,
 Codepoint glyph,
 OtMathKern kern,
 int startOffset,
 Out<OtMathKernEntry[]> kernEntries)

Fetches the raw MathKern (cut-in) data for the specified font, glyph index, and kern. The corresponding list of kern values and correction heights is returned as a list of hb_ot_math_kern_entry_t structs.

See also hb_ot_math_get_glyph_kerning, which handles selecting the appropriate kern value for a given correction height.

<note>For a glyph with n defined kern values (where n > 0), there are only n−1 defined correction heights, as each correction height defines a boundary past which the next kern value should be selected. Therefore, only the hb_ot_math_kern_entry_t.kern_value of the uppermost hb_ot_math_kern_entry_t actually comes from the font; its corresponding hb_ot_math_kern_entry_t.max_correction_height is always set to <code>INT32_MAX</code>.</note>

Parameters:

font - hb_font_t to work upon

glyph - The glyph index from which to retrieve the kernings

kern - The hb_ot_math_kern_t from which to retrieve the kernings

startOffset - offset of the first kern entry to retrieve

kernEntries - array of kern entries returned

Returns:

the total number of kern values available or zero

otMathGetGlyphTopAccentAttachment

public static Position otMathGetGlyphTopAccentAttachment(Font font,
 Codepoint glyph)

Fetches a top-accent-attachment value (if one exists) for the specified glyph index.

For any glyph that does not have a top-accent-attachment value - that is, a glyph not covered by the MathTopAccentAttachment table (or, when font has no MathTopAccentAttachment table or no MATH table, any glyph) - the function synthesizes a value, returning the position at one-half the glyph's advance width.

Parameters:

font - hb_font_t to work upon

glyph - The glyph index from which to retrieve the value

Returns:

the top accent attachment of the glyph or 0.5 * the advance width of glyph

otMathGetGlyphVariants

public static int otMathGetGlyphVariants(Font font,
 Codepoint glyph,
 Direction direction,
 int startOffset,
 Out<OtMathGlyphVariant[]> variants)

Fetches the MathGlyphConstruction for the specified font, glyph index, and direction. The corresponding list of size variants is returned as a list of hb_ot_math_glyph_variant_t structs.

<note>The direction parameter is only used to select between horizontal or vertical directions for the construction. Even though all hb_direction_t values are accepted, only the result of HB_DIRECTION_IS_HORIZONTAL is considered.</note>

Parameters:

font - hb_font_t to work upon

glyph - The index of the glyph to stretch

direction - The direction of the stretching (horizontal or vertical)

startOffset - offset of the first variant to retrieve

variants - array of variants returned

Returns:

the total number of size variants available or zero

otMathGetMinConnectorOverlap

public static Position otMathGetMinConnectorOverlap(Font font,
 Direction direction)

Fetches the MathVariants table for the specified font and returns the minimum overlap of connecting glyphs that are required to draw a glyph assembly in the specified direction.

<note>The direction parameter is only used to select between horizontal or vertical directions for the construction. Even though all hb_direction_t values are accepted, only the result of HB_DIRECTION_IS_HORIZONTAL is considered.</note>

Parameters:

font - hb_font_t to work upon

direction - direction of the stretching (horizontal or vertical)

Returns:

requested minimum connector overlap or zero

otMathHasData

public static Bool otMathHasData(Face face)

Tests whether a face has a MATH table.

Parameters:

face - hb_face_t to test

Returns:

true if the table is found, false otherwise

otMathIsGlyphExtendedShape

public static Bool otMathIsGlyphExtendedShape(Face face,
 Codepoint glyph)

Tests whether the given glyph index is an extended shape in the face.

Parameters:

face - hb_face_t to work upon

glyph - The glyph index to test

Returns:

true if the glyph is an extended shape, false otherwise

otMetaGetEntryTags

public static int otMetaGetEntryTags(Face face,
 int startOffset,
 Out<OtMetaTag[]> entries)

Fetches all available feature types.

Parameters:

face - a face object

startOffset - iteration's start offset

entries - entries tags buffer

Returns:

Number of all available feature types.

otMetaReferenceEntry

public static Blob otMetaReferenceEntry(Face face,
 OtMetaTag metaTag)

It fetches metadata entry of a given tag from a font.

Parameters:

face - a hb_face_t object.

metaTag - tag of metadata you like to have.

Returns:

A blob containing the blob.

otMetricsGetPosition

public static Bool otMetricsGetPosition(Font font,
 OtMetricsTag metricsTag,
 @Nullable
 @Nullable Position position)

Fetches metrics value corresponding to metricsTag from font.

Parameters:

font - an hb_font_t object.

metricsTag - tag of metrics value you like to fetch.

position - result of metrics value from the font.

Returns:

Whether found the requested metrics in the font.

otMetricsGetPositionWithFallback

public static void otMetricsGetPositionWithFallback(Font font,
 OtMetricsTag metricsTag,
 @Nullable
 @Nullable Position position)

Fetches metrics value corresponding to metricsTag from font, and synthesizes a value if it the value is missing in the font.

Parameters:

font - an hb_font_t object.

metricsTag - tag of metrics value you like to fetch.

position - result of metrics value from the font.

otMetricsGetVariation

public static float otMetricsGetVariation(Font font,
 OtMetricsTag metricsTag)

Fetches metrics value corresponding to metricsTag from font with the current font variation settings applied.

Parameters:

font - an hb_font_t object.

metricsTag - tag of metrics value you like to fetch.

Returns:

The requested metric value.

otMetricsGetXVariation

public static Position otMetricsGetXVariation(Font font,
 OtMetricsTag metricsTag)

Fetches horizontal metrics value corresponding to metricsTag from font with the current font variation settings applied.

Parameters:

font - an hb_font_t object.

metricsTag - tag of metrics value you like to fetch.

Returns:

The requested metric value.

otMetricsGetYVariation

public static Position otMetricsGetYVariation(Font font,
 OtMetricsTag metricsTag)

Fetches vertical metrics value corresponding to metricsTag from font with the current font variation settings applied.

Parameters:

font - an hb_font_t object.

metricsTag - tag of metrics value you like to fetch.

Returns:

The requested metric value.

otNameGetUtf16

public static int otNameGetUtf16(Face face,
 OtNameId nameId,
 Language language,
 Out<short[]> text)

Fetches a font name from the OpenType 'name' table. If language is HB_LANGUAGE_INVALID, English ("en") is assumed. Returns string in UTF-16 encoding. A NUL terminator is always written for convenience, and isn't included in the output textSize.

Parameters:

face - font face.

nameId - OpenType name identifier to fetch.

language - language to fetch the name for.

text - buffer to write fetched name into.

Returns:

full length of the requested string, or 0 if not found.

otNameGetUtf32

public static int otNameGetUtf32(Face face,
 OtNameId nameId,
 Language language,
 Out<int[]> text)

Fetches a font name from the OpenType 'name' table. If language is HB_LANGUAGE_INVALID, English ("en") is assumed. Returns string in UTF-32 encoding. A NUL terminator is always written for convenience, and isn't included in the output textSize.

Parameters:

face - font face.

nameId - OpenType name identifier to fetch.

language - language to fetch the name for.

text - buffer to write fetched name into.

Returns:

full length of the requested string, or 0 if not found.

otNameGetUtf8

public static int otNameGetUtf8(Face face,
 OtNameId nameId,
 Language language,
 Out<String[]> text)

Fetches a font name from the OpenType 'name' table. If language is HB_LANGUAGE_INVALID, English ("en") is assumed. Returns string in UTF-8 encoding. A NUL terminator is always written for convenience, and isn't included in the output textSize.

Parameters:

face - font face.

nameId - OpenType name identifier to fetch.

language - language to fetch the name for.

text - buffer to write fetched name into.

Returns:

full length of the requested string, or 0 if not found.

otNameListNames

public static OtNameEntry[] otNameListNames(Face face)

Enumerates all available name IDs and language combinations. Returned array is owned by the face and should not be modified. It can be used as long as face is alive.

Parameters:

face - font face.

Returns:

Array of available name entries.

otShapeGlyphsClosure

public static void otShapeGlyphsClosure(Font font,
 Buffer buffer,
 Feature[] features,
 Set glyphs)

Computes the transitive closure of glyphs needed for a specified input buffer under the given font and feature list. The closure is computed as a set, not as a list.

Parameters:

font - hb_font_t to work upon

buffer - The input buffer to compute from

features - The features enabled on the buffer

glyphs - The hb_set_t set of glyphs comprising the transitive closure of the query

otShapePlanCollectLookups

public static void otShapePlanCollectLookups(ShapePlan shapePlan,
 Tag tableTag,
 Set lookupIndexes)

Computes the complete set of GSUB or GPOS lookups that are applicable under a given shapePlan.

Parameters:

shapePlan - hb_shape_plan_t to query

tableTag - GSUB or GPOS

lookupIndexes - The hb_set_t set of lookups returned

otTagFromLanguage

@Deprecated
public static Tag otTagFromLanguage(Language language)

Deprecated.

use hb_ot_tags_from_script_and_language() instead

Converts an hb_language_t to an hb_tag_t.

Parameters:

language - an hb_language_t to convert.

otTagToLanguage

public static Language otTagToLanguage(Tag tag)

Converts a language tag to an hb_language_t.

Parameters:

tag - an language tag

Returns:

The hb_language_t corresponding to tag.

otTagToScript

public static Script otTagToScript(Tag tag)

Converts a script tag to an hb_script_t.

Parameters:

tag - a script tag

Returns:

The hb_script_t corresponding to tag.

otTagsFromScript

@Deprecated
public static void otTagsFromScript(Script script,
 Tag scriptTag1,
 Tag scriptTag2)

Deprecated.

use hb_ot_tags_from_script_and_language() instead

Converts an hb_script_t to script tags.

Parameters:

script - an hb_script_t to convert.

scriptTag1 - output hb_tag_t.

scriptTag2 - output hb_tag_t.

otTagsToScriptAndLanguage

public static void otTagsToScriptAndLanguage(Tag scriptTag,
 Tag languageTag,
 @Nullable
 @Nullable Out<Script> script,
 @Nullable
 @Nullable Language language)

Converts a script tag and a language tag to an hb_script_t and an hb_language_t.

Parameters:

scriptTag - a script tag

languageTag - a language tag

script - the hb_script_t corresponding to scriptTag.

language - the hb_language_t corresponding to scriptTag and languageTag.

otVarFindAxis

@Deprecated
public static Bool otVarFindAxis(Face face,
 Tag axisTag,
 MemorySegment axisIndex,
 OtVarAxis axisInfo)

Deprecated.

• use hb_ot_var_find_axis_info() instead

Fetches the variation-axis information corresponding to the specified axis tag in the specified face.

Parameters:

face - hb_face_t to work upon

axisTag - The hb_tag_t of the variation axis to query

axisIndex - The index of the variation axis

axisInfo - The hb_ot_var_axis_info_t of the axis tag queried

otVarFindAxisInfo

public static Bool otVarFindAxisInfo(Face face,
 Tag axisTag,
 OtVarAxisInfo axisInfo)

Fetches the variation-axis information corresponding to the specified axis tag in the specified face.

Parameters:

face - hb_face_t to work upon

axisTag - The hb_tag_t of the variation axis to query

axisInfo - The hb_ot_var_axis_info_t of the axis tag queried

Returns:

true if data found, false otherwise

otVarGetAxes

@Deprecated
public static int otVarGetAxes(Face face,
 int startOffset,
 Out<OtVarAxis[]> axesArray)

Deprecated.

use hb_ot_var_get_axis_infos() instead

Fetches a list of all variation axes in the specified face. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

startOffset - offset of the first lookup to retrieve

axesArray - The array of variation axes found

otVarGetAxisCount

public static int otVarGetAxisCount(Face face)

Fetches the number of OpenType variation axes included in the face.

Parameters:

face - The hb_face_t to work on

Returns:

the number of variation axes defined

otVarGetAxisInfos

public static int otVarGetAxisInfos(Face face,
 int startOffset,
 Out<OtVarAxisInfo[]> axesArray)

Fetches a list of all variation axes in the specified face. The list returned will begin at the offset provided.

Parameters:

face - hb_face_t to work upon

startOffset - offset of the first lookup to retrieve

axesArray - The array of variation axes found

Returns:

the number of variation axes in the face

otVarGetNamedInstanceCount

public static int otVarGetNamedInstanceCount(Face face)

Fetches the number of named instances included in the face.

Parameters:

face - The hb_face_t to work on

Returns:

the number of named instances defined

otVarHasData

public static Bool otVarHasData(Face face)

Tests whether a face includes any OpenType variation data in the fvar table.

Parameters:

face - The hb_face_t to work on

Returns:

true if data found, false otherwise

otVarNamedInstanceGetDesignCoords

public static int otVarNamedInstanceGetDesignCoords(Face face,
 int instanceIndex,
 Out<float[]> coords)

Fetches the design-space coordinates corresponding to the given named instance in the face.

Parameters:

face - The hb_face_t to work on

instanceIndex - The index of the named instance to query

coords - The array of coordinates found for the query

Returns:

the number of variation axes in the face

otVarNamedInstanceGetPostscriptNameId

public static OtNameId otVarNamedInstanceGetPostscriptNameId(Face face,
 int instanceIndex)

Fetches the name table Name ID that provides display names for the "PostScript name" defined for the given named instance in the face.

Parameters:

face - The hb_face_t to work on

instanceIndex - The index of the named instance to query

Returns:

the Name ID found for the PostScript name

otVarNamedInstanceGetSubfamilyNameId

public static OtNameId otVarNamedInstanceGetSubfamilyNameId(Face face,
 int instanceIndex)

Fetches the name table Name ID that provides display names for the "Subfamily name" defined for the given named instance in the face.

Parameters:

face - The hb_face_t to work on

instanceIndex - The index of the named instance to query

Returns:

the Name ID found for the Subfamily name

otVarNormalizeCoords

public static void otVarNormalizeCoords(Face face,
 int coordsLength,
 MemorySegment designCoords,
 Out<Integer> normalizedCoords)

Normalizes the given design-space coordinates. The minimum and maximum values for the axis are mapped to the interval [-1,1], with the default axis value mapped to 0.

The normalized values have 14 bits of fixed-point sub-integer precision as per OpenType specification.

Any additional scaling defined in the face's avar table is also applied, as described at https://docs.microsoft.com/en-us/typography/opentype/spec/avar

Parameters:

face - The hb_face_t to work on

coordsLength - The length of the coordinate array

designCoords - The design-space coordinates to normalize

normalizedCoords - The normalized coordinates

otVarNormalizeVariations

public static void otVarNormalizeVariations(Face face,
 Variation variations,
 int variationsLength,
 Out<int[]> coords)

Normalizes all of the coordinates in the given list of variation axes.

Parameters:

face - The hb_face_t to work on

variations - The array of variations to normalize

variationsLength - The number of variations to normalize

coords - The array of normalized coordinates

paintColor

public static void paintColor(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 Bool isForeground,
 Color color)

Perform a "color" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

isForeground - whether the color is the foreground

color - The color to use

paintColorGlyph

public static Bool paintColorGlyph(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 Codepoint glyph,
 Font font)

Perform a "color-glyph" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

glyph - the glyph ID

font - the font

paintCustomPaletteColor

public static Bool paintCustomPaletteColor(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 int colorIndex,
 Color color)

Gets the custom palette color for colorIndex.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

colorIndex - color index

color - fetched color

Returns:

true if found, false otherwise

paintFuncsCreate

public static PaintFuncs paintFuncsCreate()

Creates a new hb_paint_funcs_t structure of paint functions.

The initial reference count of 1 should be released with hb_paint_funcs_destroy() when you are done using the hb_paint_funcs_t. This function never returns NULL. If memory cannot be allocated, a special singleton hb_paint_funcs_t object will be returned.

Returns:

the paint-functions structure

paintFuncsDestroy

public static void paintFuncsDestroy(PaintFuncs funcs)

Decreases the reference count on a paint-functions structure.

When the reference count reaches zero, the structure is destroyed, freeing all memory.

Parameters:

funcs - The paint-functions structure

paintFuncsGetEmpty

public static PaintFuncs paintFuncsGetEmpty()

Fetches the singleton empty paint-functions structure.

Returns:

The empty paint-functions structure

paintFuncsGetUserData

public static MemorySegment paintFuncsGetUserData(PaintFuncs funcs,
 UserDataKey key)

Fetches the user-data associated with the specified key, attached to the specified paint-functions structure.

Parameters:

funcs - The paint-functions structure

key - The user-data key to query

Returns:

A pointer to the user data

paintFuncsIsImmutable

public static Bool paintFuncsIsImmutable(PaintFuncs funcs)

Tests whether a paint-functions structure is immutable.

Parameters:

funcs - The paint-functions structure

Returns:

true if funcs is immutable, false otherwise

paintFuncsMakeImmutable

public static void paintFuncsMakeImmutable(PaintFuncs funcs)

Makes a paint-functions structure immutable.

After this call, all attempts to set one of the callbacks on funcs will fail.

Parameters:

funcs - The paint-functions structure

paintFuncsReference

public static PaintFuncs paintFuncsReference(PaintFuncs funcs)

Increases the reference count on a paint-functions structure.

This prevents funcs from being destroyed until a matching call to hb_paint_funcs_destroy() is made.

Parameters:

funcs - The paint-functions structure

Returns:

The paint-functions structure

paintFuncsSetColorFunc

public static void paintFuncsSetColorFunc(PaintFuncs funcs,
 PaintColorFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the paint-color callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The paint-color callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetColorGlyphFunc

public static void paintFuncsSetColorGlyphFunc(PaintFuncs funcs,
 PaintColorGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the color-glyph callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The color-glyph callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetCustomPaletteColorFunc

public static void paintFuncsSetCustomPaletteColorFunc(PaintFuncs funcs,
 PaintCustomPaletteColorFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the custom-palette-color callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The custom-palette-color callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetImageFunc

public static void paintFuncsSetImageFunc(PaintFuncs funcs,
 PaintImageFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the paint-image callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The paint-image callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetLinearGradientFunc

public static void paintFuncsSetLinearGradientFunc(PaintFuncs funcs,
 PaintLinearGradientFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the linear-gradient callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The linear-gradient callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPopClipFunc

public static void paintFuncsSetPopClipFunc(PaintFuncs funcs,
 PaintPopClipFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the pop-clip callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The pop-clip callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPopGroupFunc

public static void paintFuncsSetPopGroupFunc(PaintFuncs funcs,
 PaintPopGroupFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the pop-group callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The pop-group callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPopTransformFunc

public static void paintFuncsSetPopTransformFunc(PaintFuncs funcs,
 PaintPopTransformFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the pop-transform callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The pop-transform callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPushClipGlyphFunc

public static void paintFuncsSetPushClipGlyphFunc(PaintFuncs funcs,
 PaintPushClipGlyphFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the push-clip-glyph callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The push-clip-glyph callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPushClipRectangleFunc

public static void paintFuncsSetPushClipRectangleFunc(PaintFuncs funcs,
 PaintPushClipRectangleFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the push-clip-rect callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The push-clip-rectangle callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPushGroupFunc

public static void paintFuncsSetPushGroupFunc(PaintFuncs funcs,
 PaintPushGroupFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the push-group callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The push-group callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetPushTransformFunc

public static void paintFuncsSetPushTransformFunc(PaintFuncs funcs,
 PaintPushTransformFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the push-transform callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The push-transform callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetRadialGradientFunc

public static void paintFuncsSetRadialGradientFunc(PaintFuncs funcs,
 PaintRadialGradientFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the radial-gradient callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The radial-gradient callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetSweepGradientFunc

public static void paintFuncsSetSweepGradientFunc(PaintFuncs funcs,
 PaintSweepGradientFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the sweep-gradient callback on the paint functions struct.

Parameters:

funcs - A paint functions struct

func - The sweep-gradient callback

userData - Data to pass to func

destroy - Function to call when userData is no longer needed

paintFuncsSetUserData

public static Bool paintFuncsSetUserData(PaintFuncs funcs,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified paint-functions structure.

Parameters:

funcs - The paint-functions structure

key - The user-data key

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

paintImage

public static void paintImage(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 Blob image,
 int width,
 int height,
 Tag format,
 float slant,
 @Nullable
 @Nullable GlyphExtents extents)

Perform a "image" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

image - image data

width - width of the raster image in pixels, or 0

height - height of the raster image in pixels, or 0

format - the image format as a tag

slant - the synthetic slant ratio to be applied to the image during rendering

extents - the extents of the glyph

paintLinearGradient

public static void paintLinearGradient(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 ColorLine colorLine,
 float x0,
 float y0,
 float x1,
 float y1,
 float x2,
 float y2)

Perform a "linear-gradient" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

colorLine - Color information for the gradient

x0 - X coordinate of the first point

y0 - Y coordinate of the first point

x1 - X coordinate of the second point

y1 - Y coordinate of the second point

x2 - X coordinate of the third point

y2 - Y coordinate of the third point

paintPopClip

public static void paintPopClip(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData)

Perform a "pop-clip" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

paintPopGroup

public static void paintPopGroup(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 PaintCompositeMode mode)

Perform a "pop-group" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

mode - the compositing mode to use

paintPopTransform

public static void paintPopTransform(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData)

Perform a "pop-transform" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

paintPushClipGlyph

public static void paintPushClipGlyph(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 Codepoint glyph,
 Font font)

Perform a "push-clip-glyph" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

glyph - the glyph ID

font - the font

paintPushClipRectangle

public static void paintPushClipRectangle(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 float xmin,
 float ymin,
 float xmax,
 float ymax)

Perform a "push-clip-rect" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

xmin - min X for the rectangle

ymin - min Y for the rectangle

xmax - max X for the rectangle

ymax - max Y for the rectangle

paintPushGroup

public static void paintPushGroup(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData)

Perform a "push-group" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

paintPushTransform

public static void paintPushTransform(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 float xx,
 float yx,
 float xy,
 float yy,
 float dx,
 float dy)

Perform a "push-transform" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

xx - xx component of the transform matrix

yx - yx component of the transform matrix

xy - xy component of the transform matrix

yy - yy component of the transform matrix

dx - dx component of the transform matrix

dy - dy component of the transform matrix

paintRadialGradient

public static void paintRadialGradient(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 ColorLine colorLine,
 float x0,
 float y0,
 float r0,
 float x1,
 float y1,
 float r1)

Perform a "radial-gradient" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

colorLine - Color information for the gradient

x0 - X coordinate of the first circle's center

y0 - Y coordinate of the first circle's center

r0 - radius of the first circle

x1 - X coordinate of the second circle's center

y1 - Y coordinate of the second circle's center

r1 - radius of the second circle

paintSweepGradient

public static void paintSweepGradient(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 ColorLine colorLine,
 float x0,
 float y0,
 float startAngle,
 float endAngle)

Perform a "sweep-gradient" paint operation.

Parameters:

funcs - paint functions

paintData - associated data passed by the caller

colorLine - Color information for the gradient

x0 - X coordinate of the circle's center

y0 - Y coordinate of the circle's center

startAngle - the start angle

endAngle - the end angle

scriptFromIso15924Tag

public static Script scriptFromIso15924Tag(Tag tag)

Converts an ISO 15924 script tag to a corresponding hb_script_t.

Parameters:

tag - an hb_tag_t representing an ISO 15924 tag.

Returns:

An hb_script_t corresponding to the ISO 15924 tag.

scriptFromString

public static Script scriptFromString(byte[] str)

Converts a string str representing an ISO 15924 script tag to a corresponding hb_script_t. Shorthand for hb_tag_from_string() then hb_script_from_iso15924_tag().

Parameters:

str - a string representing an ISO 15924 tag.

Returns:

An hb_script_t corresponding to the ISO 15924 tag.

scriptGetHorizontalDirection

public static Direction scriptGetHorizontalDirection(Script script)

Fetches the hb_direction_t of a script when it is set horizontally. All right-to-left scripts will return HB_DIRECTION_RTL. All left-to-right scripts will return HB_DIRECTION_LTR. Scripts that can be written either horizontally or vertically will return HB_DIRECTION_INVALID. Unknown scripts will return HB_DIRECTION_LTR.

Parameters:

script - The hb_script_t to query

Returns:

The horizontal hb_direction_t of script

scriptToIso15924Tag

public static Tag scriptToIso15924Tag(Script script)

Converts an hb_script_t to a corresponding ISO 15924 script tag.

Parameters:

script - an hb_script_t to convert.

Returns:

An hb_tag_t representing an ISO 15924 script tag.

segmentPropertiesEqual

public static Bool segmentPropertiesEqual(SegmentProperties a,
 SegmentProperties b)

Checks the equality of two hb_segment_properties_t's.

Parameters:

a - first hb_segment_properties_t to compare.

b - second hb_segment_properties_t to compare.

Returns:

true if all properties of a equal those of b, false otherwise.

segmentPropertiesHash

public static int segmentPropertiesHash(SegmentProperties p)

Creates a hash representing p.

Parameters:

p - hb_segment_properties_t to hash.

Returns:

A hash of p.

segmentPropertiesOverlay

public static void segmentPropertiesOverlay(SegmentProperties p,
 SegmentProperties src)

Fills in missing fields of p from src in a considered manner.

First, if p does not have direction set, direction is copied from src.

Next, if p and src have the same direction (which can be unset), if p does not have script set, script is copied from src.

Finally, if p and src have the same direction and script (which either can be unset), if p does not have language set, language is copied from src.

Parameters:

p - hb_segment_properties_t to fill in.

src - hb_segment_properties_t to fill in from.

setAdd

public static void setAdd(Set set,
 Codepoint codepoint)

Adds codepoint to set.

Parameters:

set - A set

codepoint - The element to add to set

setAddRange

public static void setAddRange(Set set,
 Codepoint first,
 Codepoint last)

Adds all of the elements from first to last (inclusive) to set.

Parameters:

set - A set

first - The first element to add to set

last - The final element to add to set

setAddSortedArray

public static void setAddSortedArray(Set set,
 Codepoint[] sortedCodepoints)

Adds numCodepoints codepoints to a set at once. The codepoints array must be in increasing order, with size at least numCodepoints.

Parameters:

set - A set

sortedCodepoints - Array of codepoints to add

setAllocationSuccessful

public static Bool setAllocationSuccessful(Set set)

Tests whether memory allocation for a set was successful.

Parameters:

set - A set

Returns:

true if allocation succeeded, false otherwise

setClear

public static void setClear(Set set)

Clears out the contents of a set.

Parameters:

set - A set

setCopy

public static Set setCopy(Set set)

Allocate a copy of set.

Parameters:

set - A set

Returns:

Newly-allocated set.

setCreate

public static Set setCreate()

Creates a new, initially empty set.

Returns:

The new hb_set_t

setDel

public static void setDel(Set set,
 Codepoint codepoint)

Removes codepoint from set.

Parameters:

set - A set

codepoint - Removes codepoint from set

setDelRange

public static void setDelRange(Set set,
 Codepoint first,
 Codepoint last)

Removes all of the elements from first to last (inclusive) from set.

If last is HB_SET_VALUE_INVALID, then all values greater than or equal to first are removed.

Parameters:

set - A set

first - The first element to remove from set

last - The final element to remove from set

setDestroy

public static void setDestroy(Set set)

Decreases the reference count on a set. When the reference count reaches zero, the set is destroyed, freeing all memory.

Parameters:

set - A set

setGetEmpty

public static Set setGetEmpty()

Fetches the singleton empty hb_set_t.

Returns:

The empty hb_set_t

setGetMax

public static Codepoint setGetMax(Set set)

Finds the largest element in the set.

Parameters:

set - A set

Returns:

maximum of set, or HB_SET_VALUE_INVALID if set is empty.

setGetMin

public static Codepoint setGetMin(Set set)

Finds the smallest element in the set.

Parameters:

set - A set

Returns:

minimum of set, or HB_SET_VALUE_INVALID if set is empty.

setGetPopulation

public static int setGetPopulation(Set set)

Returns the number of elements in the set.

Parameters:

set - A set

Returns:

The population of set

setGetUserData

public static MemorySegment setGetUserData(Set set,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified set.

Parameters:

set - A set

key - The user-data key to query

Returns:

A pointer to the user data

setHas

public static Bool setHas(Set set,
 Codepoint codepoint)

Tests whether codepoint belongs to set.

Parameters:

set - A set

codepoint - The element to query

Returns:

true if codepoint is in set, false otherwise

setHash

public static int setHash(Set set)

Creates a hash representing set.

Parameters:

set - A set

Returns:

A hash of set.

setIntersect

public static void setIntersect(Set set,
 Set other)

Makes set the intersection of set and other.

Parameters:

set - A set

other - Another set

setInvert

public static void setInvert(Set set)

Inverts the contents of set.

Parameters:

set - A set

setIsEmpty

public static Bool setIsEmpty(Set set)

Tests whether a set is empty (contains no elements).

Parameters:

set - a set.

Returns:

true if set is empty

setIsEqual

public static Bool setIsEqual(Set set,
 Set other)

Tests whether set and other are equal (contain the same elements).

Parameters:

set - A set

other - Another set

Returns:

true if the two sets are equal, false otherwise.

setIsInverted

public static Bool setIsInverted(Set set)

Returns whether the set is inverted.

Parameters:

set - A set

Returns:

true if the set is inverted, false otherwise

setIsSubset

public static Bool setIsSubset(Set set,
 Set largerSet)

Tests whether set is a subset of largerSet.

Parameters:

set - A set

largerSet - Another set

Returns:

true if the set is a subset of (or equal to) largerSet, false otherwise.

setNext

public static Bool setNext(Set set,
 Codepoint codepoint)

Fetches the next element in set that is greater than current value of codepoint.

Set codepoint to HB_SET_VALUE_INVALID to get started.

Parameters:

set - A set

codepoint - Input = Code point to query Output = Code point retrieved

Returns:

true if there was a next value, false otherwise

setNextMany

public static int setNextMany(Set set,
 Codepoint codepoint,
 Codepoint[] out)

Finds the next element in set that is greater than codepoint. Writes out codepoints to out, until either the set runs out of elements, or size codepoints are written, whichever comes first.

Parameters:

set - A set

codepoint - Outputting codepoints starting after this one. Use HB_SET_VALUE_INVALID to get started.

out - An array of codepoints to write to.

Returns:

the number of values written.

setNextRange

public static Bool setNextRange(Set set,
 Codepoint first,
 Codepoint last)

Fetches the next consecutive range of elements in set that are greater than current value of last.

Set last to HB_SET_VALUE_INVALID to get started.

Parameters:

set - A set

first - The first code point in the range

last - Input = The current last code point in the range Output = The last code point in the range

Returns:

true if there was a next range, false otherwise

setPrevious

public static Bool setPrevious(Set set,
 Codepoint codepoint)

Fetches the previous element in set that is lower than current value of codepoint.

Set codepoint to HB_SET_VALUE_INVALID to get started.

Parameters:

set - A set

codepoint - Input = Code point to query Output = Code point retrieved

Returns:

true if there was a previous value, false otherwise

setPreviousRange

public static Bool setPreviousRange(Set set,
 Codepoint first,
 Codepoint last)

Fetches the previous consecutive range of elements in set that are greater than current value of last.

Set first to HB_SET_VALUE_INVALID to get started.

Parameters:

set - A set

first - Input = The current first code point in the range Output = The first code point in the range

last - The last code point in the range

Returns:

true if there was a previous range, false otherwise

setReference

public static Set setReference(Set set)

Increases the reference count on a set.

Parameters:

set - A set

Returns:

The set

setSet

public static void setSet(Set set,
 Set other)

Makes the contents of set equal to the contents of other.

Parameters:

set - A set

other - Another set

setSetUserData

public static Bool setSetUserData(Set set,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified set.

Parameters:

set - A set

key - The user-data key to set

data - A pointer to the user data to set

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

setSubtract

public static void setSubtract(Set set,
 Set other)

Subtracts the contents of other from set.

Parameters:

set - A set

other - Another set

setSymmetricDifference

public static void setSymmetricDifference(Set set,
 Set other)

Makes set the symmetric difference of set and other.

Parameters:

set - A set

other - Another set

setUnion

public static void setUnion(Set set,
 Set other)

Makes set the union of set and other.

Parameters:

set - A set

other - Another set

shape

public static void shape(Font font,
 Buffer buffer,
 @Nullable
 @Nullable Feature[] features)

Shapes buffer using font turning its Unicode characters content to positioned glyphs. If features is not NULL, it will be used to control the features applied during shaping. If two features have the same tag but overlapping ranges the value of the feature with the higher index takes precedence.

Parameters:

font - an hb_font_t to use for shaping

buffer - an hb_buffer_t to shape

features - an array of user specified hb_feature_t or NULL

shapeFull

public static Bool shapeFull(Font font,
 Buffer buffer,
 @Nullable
 @Nullable Feature[] features,
 @Nullable
 @Nullable String[] shaperList)

See hb_shape() for details. If shaperList is not NULL, the specified shapers will be used in the given order, otherwise the default shapers list will be used.

Parameters:

font - an hb_font_t to use for shaping

buffer - an hb_buffer_t to shape

features - an array of user specified hb_feature_t or NULL

shaperList - a NULL-terminated array of shapers to use or NULL

Returns:

false if all shapers failed, true otherwise

shapeJustify

public static Bool shapeJustify(Font font,
 Buffer buffer,
 @Nullable
 @Nullable Feature[] features,
 @Nullable
 @Nullable String[] shaperList,
 float minTargetAdvance,
 float maxTargetAdvance,
 Out<Float> advance,
 Tag varTag,
 Out<Float> varValue)

See hb_shape_full() for basic details. If shaperList is not NULL, the specified shapers will be used in the given order, otherwise the default shapers list will be used.

In addition, justify the shaping results such that the shaping results reach the target advance width/height, depending on the buffer direction.

If the advance of the buffer shaped with hb_shape_full() is already known, put that in *advance. Otherwise set *advance to zero.

This API is currently experimental and will probably change in the future.

Parameters:

font - a mutable hb_font_t to use for shaping

buffer - an hb_buffer_t to shape

features - an array of user specified hb_feature_t or NULL

shaperList - a NULL-terminated array of shapers to use or NULL

minTargetAdvance - Minimum advance width/height to aim for.

maxTargetAdvance - Maximum advance width/height to aim for.

advance - Input/output advance width/height of the buffer.

varTag - Variation-axis tag used for justification.

varValue - Variation-axis value used to reach target justification.

Returns:

false if all shapers failed, true otherwise

XSince: EXPERIMENTAL

shapeListShapers

public static String[] shapeListShapers()

Retrieves the list of shapers supported by HarfBuzz.

Returns:

an array of constant strings

shapePlanCreate

public static ShapePlan shapePlanCreate(Face face,
 SegmentProperties props,
 Feature[] userFeatures,
 String[] shaperList)

Constructs a shaping plan for a combination of face, userFeatures, props, and shaperList.

Parameters:

face - hb_face_t to use

props - The hb_segment_properties_t of the segment

userFeatures - The list of user-selected features

shaperList - List of shapers to try

Returns:

The shaping plan

shapePlanCreate2

public static ShapePlan shapePlanCreate2(Face face,
 SegmentProperties props,
 Feature[] userFeatures,
 int[] coords,
 String[] shaperList)

The variable-font version of hb_shape_plan_create. Constructs a shaping plan for a combination of face, userFeatures, props, and shaperList, plus the variation-space coordinates coords.

Parameters:

face - hb_face_t to use

props - The hb_segment_properties_t of the segment

userFeatures - The list of user-selected features

coords - The list of variation-space coordinates

shaperList - List of shapers to try

Returns:

The shaping plan

shapePlanCreateCached

public static ShapePlan shapePlanCreateCached(Face face,
 SegmentProperties props,
 Feature[] userFeatures,
 String[] shaperList)

Creates a cached shaping plan suitable for reuse, for a combination of face, userFeatures, props, and shaperList.

Parameters:

face - hb_face_t to use

props - The hb_segment_properties_t of the segment

userFeatures - The list of user-selected features

shaperList - List of shapers to try

Returns:

The shaping plan

shapePlanCreateCached2

public static ShapePlan shapePlanCreateCached2(Face face,
 SegmentProperties props,
 Feature[] userFeatures,
 int[] coords,
 String[] shaperList)

The variable-font version of hb_shape_plan_create_cached. Creates a cached shaping plan suitable for reuse, for a combination of face, userFeatures, props, and shaperList, plus the variation-space coordinates coords.

Parameters:

face - hb_face_t to use

props - The hb_segment_properties_t of the segment

userFeatures - The list of user-selected features

coords - The list of variation-space coordinates

shaperList - List of shapers to try

Returns:

The shaping plan

shapePlanDestroy

public static void shapePlanDestroy(ShapePlan shapePlan)

Decreases the reference count on the given shaping plan. When the reference count reaches zero, the shaping plan is destroyed, freeing all memory.

Parameters:

shapePlan - A shaping plan

shapePlanExecute

public static Bool shapePlanExecute(ShapePlan shapePlan,
 Font font,
 Buffer buffer,
 Feature[] features)

Executes the given shaping plan on the specified buffer, using the given font and features.

Parameters:

shapePlan - A shaping plan

font - The hb_font_t to use

buffer - The hb_buffer_t to work upon

features - Features to enable

Returns:

true if success, false otherwise.

shapePlanGetEmpty

public static ShapePlan shapePlanGetEmpty()

Fetches the singleton empty shaping plan.

Returns:

The empty shaping plan

shapePlanGetShaper

public static String shapePlanGetShaper(ShapePlan shapePlan)

Fetches the shaper from a given shaping plan.

Parameters:

shapePlan - A shaping plan

Returns:

The shaper

shapePlanGetUserData

public static MemorySegment shapePlanGetUserData(ShapePlan shapePlan,
 UserDataKey key)

Fetches the user data associated with the specified key, attached to the specified shaping plan.

Parameters:

shapePlan - A shaping plan

key - The user-data key to query

Returns:

A pointer to the user data

shapePlanReference

public static ShapePlan shapePlanReference(ShapePlan shapePlan)

Increases the reference count on the given shaping plan.

Parameters:

shapePlan - A shaping plan

Returns:

shapePlan

shapePlanSetUserData

public static Bool shapePlanSetUserData(ShapePlan shapePlan,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the given shaping plan.

Parameters:

shapePlan - A shaping plan

key - The user-data key to set

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise.

styleGetValue

public static float styleGetValue(Font font,
 StyleTag styleTag)

Searches variation axes of a hb_font_t object for a specific axis first, if not set, then tries to get default style values from different tables of the font.

Parameters:

font - a hb_font_t object.

styleTag - a style tag.

Returns:

Corresponding axis or default value to a style tag.

tagFromString

public static Tag tagFromString(byte[] str)

Converts a string into an hb_tag_t. Valid tags are four characters. Shorter input strings will be padded with spaces. Longer input strings will be truncated.

Parameters:

str - String to convert

Returns:

The hb_tag_t corresponding to str

tagToString

public static void tagToString(Tag tag,
 Out<byte[]> buf)

Converts an hb_tag_t to a string and returns it in buf. Strings will be four characters long.

Parameters:

tag - hb_tag_t to convert

buf - Converted string

unicodeCombiningClass

public static UnicodeCombiningClass unicodeCombiningClass(UnicodeFuncs ufuncs,
 Codepoint unicode)

Retrieves the Canonical Combining Class (ccc) property of code point unicode.

Parameters:

ufuncs - The Unicode-functions structure

unicode - The code point to query

Returns:

The hb_unicode_combining_class_t of unicode

unicodeCompose

public static Bool unicodeCompose(UnicodeFuncs ufuncs,
 Codepoint a,
 Codepoint b,
 Codepoint ab)

Fetches the composition of a sequence of two Unicode code points.

Calls the composition function of the specified Unicode-functions structure ufuncs.

Parameters:

ufuncs - The Unicode-functions structure

a - The first Unicode code point to compose

b - The second Unicode code point to compose

ab - The composition of a, b

Returns:

true if a and b composed, false otherwise

unicodeDecompose

public static Bool unicodeDecompose(UnicodeFuncs ufuncs,
 Codepoint ab,
 Codepoint a,
 Codepoint b)

Fetches the decomposition of a Unicode code point.

Calls the decomposition function of the specified Unicode-functions structure ufuncs.

Parameters:

ufuncs - The Unicode-functions structure

ab - Unicode code point to decompose

a - The first code point of the decomposition of ab

b - The second code point of the decomposition of ab

Returns:

true if ab was decomposed, false otherwise

unicodeDecomposeCompatibility

@Deprecated
public static int unicodeDecomposeCompatibility(UnicodeFuncs ufuncs,
 Codepoint u,
 Codepoint decomposed)

Deprecated.

Fetches the compatibility decomposition of a Unicode code point. Deprecated.

Parameters:

ufuncs - The Unicode-functions structure

u - Code point to decompose

decomposed - Compatibility decomposition of u

Returns:

length of decomposed.

unicodeEastasianWidth

@Deprecated
public static int unicodeEastasianWidth(UnicodeFuncs ufuncs,
 Codepoint unicode)

Deprecated.

Don't use. Not used by HarfBuzz.

Parameters:

ufuncs - a Unicode-function structure

unicode - The code point to query

unicodeFuncsCreate

public static UnicodeFuncs unicodeFuncsCreate(@Nullable
 @Nullable UnicodeFuncs parent)

Creates a new hb_unicode_funcs_t structure of Unicode functions.

Parameters:

parent - Parent Unicode-functions structure

Returns:

The Unicode-functions structure

unicodeFuncsDestroy

public static void unicodeFuncsDestroy(UnicodeFuncs ufuncs)

Decreases the reference count on a Unicode-functions structure. When the reference count reaches zero, the Unicode-functions structure is destroyed, freeing all memory.

Parameters:

ufuncs - The Unicode-functions structure

unicodeFuncsGetDefault

public static UnicodeFuncs unicodeFuncsGetDefault()

Fetches a pointer to the default Unicode-functions structure that is used when no functions are explicitly set on hb_buffer_t.

Returns:

a pointer to the hb_unicode_funcs_t Unicode-functions structure

unicodeFuncsGetEmpty

public static UnicodeFuncs unicodeFuncsGetEmpty()

Fetches the singleton empty Unicode-functions structure.

Returns:

The empty Unicode-functions structure

unicodeFuncsGetParent

public static UnicodeFuncs unicodeFuncsGetParent(UnicodeFuncs ufuncs)

Fetches the parent of the Unicode-functions structure ufuncs.

Parameters:

ufuncs - The Unicode-functions structure

Returns:

The parent Unicode-functions structure

unicodeFuncsGetUserData

public static MemorySegment unicodeFuncsGetUserData(UnicodeFuncs ufuncs,
 UserDataKey key)

Fetches the user-data associated with the specified key, attached to the specified Unicode-functions structure.

Parameters:

ufuncs - The Unicode-functions structure

key - The user-data key to query

Returns:

A pointer to the user data

unicodeFuncsIsImmutable

public static Bool unicodeFuncsIsImmutable(UnicodeFuncs ufuncs)

Tests whether the specified Unicode-functions structure is immutable.

Parameters:

ufuncs - The Unicode-functions structure

Returns:

true if ufuncs is immutable, false otherwise

unicodeFuncsMakeImmutable

public static void unicodeFuncsMakeImmutable(UnicodeFuncs ufuncs)

Makes the specified Unicode-functions structure immutable.

Parameters:

ufuncs - The Unicode-functions structure

unicodeFuncsReference

public static UnicodeFuncs unicodeFuncsReference(UnicodeFuncs ufuncs)

Increases the reference count on a Unicode-functions structure.

Parameters:

ufuncs - The Unicode-functions structure

Returns:

The Unicode-functions structure

unicodeFuncsSetCombiningClassFunc

public static void unicodeFuncsSetCombiningClassFunc(UnicodeFuncs ufuncs,
 UnicodeCombiningClassFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_combining_class_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetComposeFunc

public static void unicodeFuncsSetComposeFunc(UnicodeFuncs ufuncs,
 UnicodeComposeFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_compose_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetDecomposeCompatibilityFunc

@Deprecated
public static void unicodeFuncsSetDecomposeCompatibilityFunc(UnicodeFuncs ufuncs,
 UnicodeDecomposeCompatibilityFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Deprecated.

Sets the implementation function for hb_unicode_decompose_compatibility_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetDecomposeFunc

public static void unicodeFuncsSetDecomposeFunc(UnicodeFuncs ufuncs,
 UnicodeDecomposeFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_decompose_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetEastasianWidthFunc

@Deprecated
public static void unicodeFuncsSetEastasianWidthFunc(UnicodeFuncs ufuncs,
 UnicodeEastasianWidthFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Deprecated.

Sets the implementation function for hb_unicode_eastasian_width_func_t.

Parameters:

ufuncs - a Unicode-function structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetGeneralCategoryFunc

public static void unicodeFuncsSetGeneralCategoryFunc(UnicodeFuncs ufuncs,
 UnicodeGeneralCategoryFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_general_category_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetMirroringFunc

public static void unicodeFuncsSetMirroringFunc(UnicodeFuncs ufuncs,
 UnicodeMirroringFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_mirroring_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetScriptFunc

public static void unicodeFuncsSetScriptFunc(UnicodeFuncs ufuncs,
 UnicodeScriptFunc func,
 @Nullable
 @Nullable MemorySegment userData,
 @Nullable
 @Nullable DestroyFunc destroy)

Sets the implementation function for hb_unicode_script_func_t.

Parameters:

ufuncs - A Unicode-functions structure

func - The callback function to assign

userData - Data to pass to func

destroy - The function to call when userData is not needed anymore

unicodeFuncsSetUserData

public static Bool unicodeFuncsSetUserData(UnicodeFuncs ufuncs,
 UserDataKey key,
 @Nullable
 @Nullable MemorySegment data,
 @Nullable
 @Nullable DestroyFunc destroy,
 Bool replace)

Attaches a user-data key/data pair to the specified Unicode-functions structure.

Parameters:

ufuncs - The Unicode-functions structure

key - The user-data key

data - A pointer to the user data

destroy - A callback to call when data is not needed anymore

replace - Whether to replace an existing data with the same key

Returns:

true if success, false otherwise

unicodeGeneralCategory

public static UnicodeGeneralCategory unicodeGeneralCategory(UnicodeFuncs ufuncs,
 Codepoint unicode)

Retrieves the General Category (gc) property of code point unicode.

Parameters:

ufuncs - The Unicode-functions structure

unicode - The code point to query

Returns:

The hb_unicode_general_category_t of unicode

unicodeMirroring

public static Codepoint unicodeMirroring(UnicodeFuncs ufuncs,
 Codepoint unicode)

Retrieves the Bi-directional Mirroring Glyph code point defined for code point unicode.

Parameters:

ufuncs - The Unicode-functions structure

unicode - The code point to query

Returns:

The hb_codepoint_t of the Mirroring Glyph for unicode

unicodeScript

public static Script unicodeScript(UnicodeFuncs ufuncs,
 Codepoint unicode)

Retrieves the hb_script_t script to which code point unicode belongs.

Parameters:

ufuncs - The Unicode-functions structure

unicode - The code point to query

Returns:

The hb_script_t of unicode

variationFromString

public static Bool variationFromString(byte[] str,
 Variation variation)

Parses a string into a hb_variation_t.

The format for specifying variation settings follows. All valid CSS font-variation-settings values other than 'normal' and 'inherited' are also accepted, though, not documented below.

The format is a tag, optionally followed by an equals sign, followed by a number. For example wght=500, or slnt=-7.5.

Parameters:

str - a string to parse

variation - the hb_variation_t to initialize with the parsed values

Returns:

true if str is successfully parsed, false otherwise

variationToString

public static void variationToString(Variation variation,
 Out<String[]> buf)

Converts an hb_variation_t into a NULL-terminated string in the format understood by hb_variation_from_string(). The client in responsible for allocating big enough size for buf, 128 bytes is more than enough.

Parameters:

variation - an hb_variation_t to convert

buf - output string