Package org.freedesktop.harfbuzz

Interface PaintLinearGradientFunc

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 PaintLinearGradientFunc
extends FunctionPointer

Functional interface declaration of the PaintLinearGradientFunc callback.

See Also:

• run(org.freedesktop.harfbuzz.PaintFuncs, java.lang.foreign.MemorySegment, org.freedesktop.harfbuzz.ColorLine, float, float, float, float, float, float)

Method Summary

Modifier and Type	Method	Description
void	run(PaintFuncs funcs, @Nullable MemorySegment paintData, ColorLine colorLine, float x0, float y0, float x1, float y1, float x2, float y2)	A virtual method for the hb_paint_funcs_t to paint a linear gradient everywhere within the current clip.
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, float, float, float, float, float, float, java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment funcs, MemorySegment paintData, MemorySegment colorLine, float x0, float y0, float x1, float y1, float x2, float y2, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

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

A virtual method for the hb_paint_funcs_t to paint a linear gradient everywhere within the current clip.

The colorLine object contains information about the colors of the gradients. It is only valid for the duration of the callback, you cannot keep it around.

The coordinates of the points are interpreted according to the current transform.

See the OpenType spec COLR section for details on how the points define the direction of the gradient, and how to interpret the colorLine.

upcall

default void upcall(MemorySegment funcs,
 MemorySegment paintData,
 MemorySegment colorLine,
 float x0,
 float y0,
 float x1,
 float y1,
 float x2,
 float y2,
 MemorySegment userData)

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