Module org.freedesktop.cairo

Package org.freedesktop.cairo

Interface RasterSourceReleaseFunc

Functional Interface:

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

@FunctionalInterface
public interface RasterSourceReleaseFunc

RasterSourceReleaseFunc is the type of function which is called when the pixel data is no longer being access by the pattern for the rendering operation. Typically this function will simply destroy the surface created during acquire.

Since:

1.12

Method Summary

Modifier and Type	Method	Description
void	release(RasterSource pattern, Surface target)	Called when the pixel data is no longer being access by the pattern for the rendering operation.
default MemorySegment	toCallback(Arena arena)	Generates an upcall stub, a C function pointer that will call upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment).
default void	upcall(MemorySegment pattern, MemorySegment callbackData, MemorySegment target)	The callback that is executed by native code.

Method Details

release

void release(RasterSource pattern,
 Surface target)

Called when the pixel data is no longer being access by the pattern for the rendering operation. Typically this function will simply destroy the surface created during acquire.

Parameters:

pattern - the pattern being rendered from

target - the surface created during acquire

Since:

1.12

upcall

default void upcall(MemorySegment pattern,
 MemorySegment callbackData,
 MemorySegment target)

The callback that is executed by native code. This method marshals the parameters and calls release(RasterSource, Surface).

Parameters:

pattern - the pattern being rendered from

callbackData - ignored

target - the surface created during acquire

Since:

1.12

toCallback

default MemorySegment toCallback(Arena arena)

Generates an upcall stub, a C function pointer that will call upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment).

Parameters:

arena - the arena in which the upcall stub will be allocated

Returns:

the function pointer of the upcall stub

Since:

1.12