Package org.freedesktop.harfbuzz

Interface FontGetFontExtentsFunc

All Superinterfaces:

FunctionPointer

All Known Subinterfaces:

FontGetFontHExtentsFunc, FontGetFontVExtentsFunc

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 FontGetFontExtentsFunc
extends FunctionPointer

Functional interface declaration of the FontGetFontExtentsFunc callback.

See Also:

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

Method Summary

Modifier and Type	Method	Description
Bool	run(Font font, @Nullable MemorySegment fontData, FontExtents extents)	This method should retrieve the extents for a font.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, MemorySegment extents, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Bool run(Font font,
 @Nullable
 @Nullable MemorySegment fontData,
 FontExtents extents)

This method should retrieve the extents for a font.

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 MemorySegment extents,
 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.FontExtents) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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