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/*
* $Id$
*
* Copyright © 2004 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "lpint.h"
Bool
_xlightpipe_create_window_image (light_pipe_window *lpw)
{
int image_size;
XGCValues gcv;
lpw->public.image = XCreateImage (lpw->display,
lpw->visual,
lpw->depth,
ZPixmap,
0,
0,
lpw->public.geometry.width,
lpw->public.geometry.height,
32,
0);
if (!lpw->public.image)
return False;
image_size = (lpw->public.image->bytes_per_line *
lpw->public.geometry.height);
if (!image_size)
{
XDestroyImage (lpw->public.image);
return False;
}
lpw->shm_info.shmid = shmget (IPC_PRIVATE, image_size, IPC_CREAT|0600);
if (lpw->shm_info.shmid < 0)
{
XDestroyImage (lpw->public.image);
lpw->public.image = 0;
return False;
}
lpw->shm_info.shmaddr = (char *) shmat (lpw->shm_info.shmid, 0, 0);
if (lpw->shm_info.shmaddr == ((char *) -1))
{
XDestroyImage (lpw->public.image);
lpw->public.image = 0;
shmctl (lpw->shm_info.shmid, IPC_RMID, 0);
return False;
}
lpw->shm_info.readOnly = False;
XShmAttach (lpw->display, &lpw->shm_info);
lpw->public.image->data = lpw->shm_info.shmaddr;
lpw->public.image->obdata = (char *) &lpw->shm_info;
lpw->shm_pixmap = XShmCreatePixmap (lpw->display,
lpw->window,
lpw->public.image->data,
&lpw->shm_info,
lpw->public.geometry.width,
lpw->public.geometry.height,
lpw->depth);
gcv.graphics_exposures = False;
gcv.subwindow_mode = IncludeInferiors;
lpw->shm_gc = XCreateGC (lpw->display,
lpw->window,
GCGraphicsExposures|GCSubwindowMode,
&gcv);
return True;
}
void
_xlightpipe_destroy_window_image (light_pipe_window *lpw)
{
if (lpw->public.image)
{
XShmDetach (lpw->display, &lpw->shm_info);
XSync (lpw->display, False);
(void) shmdt (&lpw->shm_info.shmaddr);
(void) shmctl (lpw->shm_info.shmid, IPC_RMID, 0);
lpw->public.image->data = 0;
lpw->public.image->obdata = 0;
XDestroyImage (lpw->public.image);
XFreePixmap (lpw->display, lpw->shm_pixmap);
XFreeGC (lpw->display, lpw->shm_gc);
lpw->public.image = 0;
}
}
void
_xlightpipe_update_region (light_pipe_window *lpw, int x, int y, int width, int height)
{
XCopyArea (lpw->display,
lpw->window,
lpw->shm_pixmap,
lpw->shm_gc,
x, y, width, height, x, y);
}
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