Package org.freedesktop.harfbuzz

Interface PaintCustomPaletteColorFunc

All Superinterfaces:

FunctionPointer

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 PaintCustomPaletteColorFunc
extends FunctionPointer

Functional interface declaration of the PaintCustomPaletteColorFunc callback.

See Also:

• run(org.freedesktop.harfbuzz.PaintFuncs, java.lang.foreign.MemorySegment, int, org.freedesktop.harfbuzz.Color)

Method Summary

Modifier and Type	Method	Description
Bool	run(PaintFuncs funcs, @Nullable MemorySegment paintData, int colorIndex, Color color)	A virtual method for the hb_paint_funcs_t to fetch a color from the custom color palette.
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, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment funcs, MemorySegment paintData, int colorIndex, MemorySegment color, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Bool run(PaintFuncs funcs,
 @Nullable
 @Nullable MemorySegment paintData,
 int colorIndex,
 Color color)

A virtual method for the hb_paint_funcs_t to fetch a color from the custom color palette.

Custom palette colors override the colors from the fonts selected color palette. It is not necessary to override all palette entries; for entries that should be taken from the font palette, return false.

This function might get called multiple times, but the custom palette is expected to remain unchanged for duration of a hb_font_paint_glyph() call.

upcall

default int upcall(MemorySegment funcs,
 MemorySegment paintData,
 int colorIndex,
 MemorySegment color,
 MemorySegment userData)

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