Interface PixbufSaveFunc

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("org.javagi.JavaGI")
public interface PixbufSaveFunc
extends FunctionPointer

Functional interface declaration of the PixbufSaveFunc callback.

See Also:

• run(byte[], Out)

Method Summary

Modifier and Type	Method	Description
boolean	run(@Nullable byte @Nullable [] buf, Out<GError> error)	Save functions used by Pixbuf.saveToCallback(PixbufSaveFunc, String, GError[], Object...).
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, long, MemorySegment, MemorySegment) method.
default int	upcall(MemorySegment buf, long count, MemorySegment error, MemorySegment data)	The upcall method is called from native code.

Method Details

run

boolean run(@Nullable byte @Nullable [] buf,
 Out<GError> error)

Save functions used by Pixbuf.saveToCallback(PixbufSaveFunc, String, GError[], Object...).

This function is called once for each block of bytes that is "written" by gdk_pixbuf_save_to_callback().

If successful it should return TRUE; if an error occurs it should set error and return FALSE, in which case gdk_pixbuf_save_to_callback() will fail with the same error.

Parameters:

buf - bytes to be written.

error - A location to return an error.

Returns:

TRUE if successful, FALSE otherwise

Since:

2.4

upcall

default int upcall(MemorySegment buf,
 long count,
 MemorySegment error,
 MemorySegment data)

The upcall method is called from native code. The parameters are marshaled and run(byte[], Out) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(MemorySegment, long, MemorySegment, MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer