gp_proxy_shm.h File Reference

A SHM pixmap. More...

#include <backends/gp_proxy_proto.h>
#include <core/gp_pixmap.h>

Go to the source code of this file.

Data Structures
struct	gp_proxy_shm
	A SHM pixmap. More...

Typedefs
typedef struct gp_proxy_shm	gp_proxy_shm
	A SHM pixmap.

Functions
gp_proxy_shm *	gp_proxy_shm_init (const char *path, gp_size w, gp_size h, gp_pixel_type type)
	Creates an SHM pixmap.
int	gp_proxy_shm_resize (gp_proxy_shm *self, gp_size w, gp_size h)
	Resizes a SHM pixmap.
void	gp_proxy_shm_exit (gp_proxy_shm *self)
	Removes a SHM pixmap.

Detailed Description

A SHM pixmap.

Definition in file gp_proxy_shm.h.

Function Documentation

gp_proxy_shm_exit()

void gp_proxy_shm_exit

(

gp_proxy_shm *

self

)

Removes a SHM pixmap.

Parameters

self	A SHM pixmap to be removed and deallocated.

gp_proxy_shm_init()

gp_proxy_shm * gp_proxy_shm_init	(	const char *	path,
		gp_size	w,
		gp_size	h,
		gp_pixel_type	type )

Creates an SHM pixmap.

This is called by the server to initialize a SHM pixmap for the application to render to. The SHM segment size is rounded to PAGE_SIZE.

Parameters

path	in the /dev/shm/ filesystem, 64 bytes at max.
w	Image width.
h	Image height.
type	Image pixel type.

Returns

Newly created SHM pixmap.

gp_proxy_shm_resize()

int gp_proxy_shm_resize	(	gp_proxy_shm *	self,
		gp_size	w,
		gp_size	h )

Resizes a SHM pixmap.

Resizes SHM image. All applications have unmap the buffer before this call is called and have to remap the shm before they attempt to use it again.

Parameters

self	A SHM pixmap.
w	New width. @parm h New height.

Returns

0 if shm buffer haven't needed to be resized, only pixmap size has been changed 1 if buffer was resized -1 on failure