Module org.freedesktop.cairo

Package org.freedesktop.cairo

Interface RasterSourceSnapshotFunc

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 RasterSourceSnapshotFunc

RasterSourceSnapshotFunc is the type of function which is called when the pixel data needs to be preserved for later use during printing. This pattern will be accessed again later, and it is expected to provide the pixel data that was current at the time of snapshotting.

Since:

1.12

Method Summary

Modifier and Type	Method	Description
Status	snapshot(RasterSource pattern)	Called when the pixel data needs to be preserved for later use during printing.
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).
default int	upcall(MemorySegment pattern, MemorySegment callbackData)	The callback that is executed by native code.

Method Details

snapshot

Status snapshot(RasterSource pattern)

Called when the pixel data needs to be preserved for later use during printing. This pattern will be accessed again later, and it is expected to provide the pixel data that was current at the time of snapshotting.

Parameters:

pattern - the pattern being rendered from

Returns:

Status.SUCCESS on success, or one of the Status error codes for failure.

Since:

1.12

upcall

default int upcall(MemorySegment pattern,
 MemorySegment callbackData)

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

Parameters:

pattern - the pattern being rendered from

callbackData - ignored

Returns:

Status.SUCCESS on success, or one of the Status error codes for failure.

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).

Parameters:

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

Returns:

the function pointer of the upcall stub

Since:

1.12