gp_backend_virtual.h File Reference

A virtual backend. More...

#include <core/gp_pixel.h>
#include <backends/gp_backend.h>

Go to the source code of this file.

Enumerations
enum	gp_backend_virt_flags { GP_BACKEND_CALL_EXIT = 0x01 }
	A virtual backend flags. More...

Functions
gp_backend *	gp_backend_virt_init (gp_backend *backend, gp_pixel_type pixel_type, enum gp_backend_virt_flags flags)
	Creates an virtual backend on the top of the existing backend.

Detailed Description

A virtual backend.

Virtual backend, could emulate backed with any pixel type on the top of an initalized backend, e.g. you can emulate 4bpp grayscale backend on the top of RBG888 X11.

Mostly useful for testing.

Definition in file gp_backend_virtual.h.

Enumeration Type Documentation

gp_backend_virt_flags

enum gp_backend_virt_flags

A virtual backend flags.

Enumerator
GP_BACKEND_CALL_EXIT	If set virtual backend exit calls 'parent' exit as well.

Definition at line 26 of file gp_backend_virtual.h.

Function Documentation

gp_backend_virt_init()

gp_backend * gp_backend_virt_init	(	gp_backend *	backend,
		gp_pixel_type	pixel_type,
		enum gp_backend_virt_flags	flags
	)

Creates an virtual backend on the top of the existing backend.

Parameters

backend	Already initialized backend.
pixel_type	A pixel type to emulate.
flags	A gp_backend_virt_flags.

Returns

A newly initialized virtual backend or NULL in a case of a failure.