Package org.freedesktop.harfbuzz

Interface FontGetGlyphAdvanceFunc

All Superinterfaces:

FunctionPointer

All Known Subinterfaces:

FontGetGlyphHAdvanceFunc, FontGetGlyphVAdvanceFunc

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface FontGetGlyphAdvanceFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphAdvanceFunc callback.

See Also:

• run(org.freedesktop.harfbuzz.Font, java.lang.foreign.MemorySegment, org.freedesktop.harfbuzz.Codepoint)

Method Summary

Modifier and Type	Method	Description
Position	run(Font font, @Nullable MemorySegment fontData, Codepoint glyph)	A virtual method for the hb_font_funcs_t of an hb_font_t object.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, int glyph, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Position run(Font font,
 @Nullable
 @Nullable MemorySegment fontData,
 Codepoint glyph)

A virtual method for the hb_font_funcs_t of an hb_font_t object.

This method should retrieve the advance for a specified glyph. The method must return an hb_position_t.

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 int glyph,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(org.freedesktop.harfbuzz.Font, java.lang.foreign.MemorySegment, org.freedesktop.harfbuzz.Codepoint) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer