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Added the X11 framebuffer implementation. Simple! :)
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/* | |||
SDL - Simple DirectMedia Layer | |||
Copyright (C) 1997-2009 Sam Lantinga | |||
This library is free software; you can redistribute it and/or | |||
modify it under the terms of the GNU Lesser General Public | |||
License as published by the Free Software Foundation; either | |||
version 2.1 of the License, or (at your option) any later version. | |||
This library is distributed in the hope that it will be useful, | |||
but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |||
Lesser General Public License for more details. | |||
You should have received a copy of the GNU Lesser General Public | |||
License along with this library; if not, write to the Free Software | |||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |||
Sam Lantinga | |||
slouken@libsdl.org | |||
*/ | |||
#include "SDL_config.h" | |||
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#include "SDL_x11video.h" | |||
#include "SDL_x11framebuffer.h" | |||
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#ifndef NO_SHARED_MEMORY | |||
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/* Shared memory error handler routine */ | |||
static int shm_error; | |||
static int (*X_handler)(Display *, XErrorEvent *) = NULL; | |||
static int shm_errhandler(Display *d, XErrorEvent *e) | |||
{ | |||
if ( e->error_code == BadAccess ) { | |||
shm_error = True; | |||
return(0); | |||
} else | |||
return(X_handler(d,e)); | |||
} | |||
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static SDL_bool have_mitshm(void) | |||
{ | |||
/* Only use shared memory on local X servers */ | |||
if ( (SDL_strncmp(XDisplayName(NULL), ":", 1) == 0) || | |||
(SDL_strncmp(XDisplayName(NULL), "unix:", 5) == 0) ) { | |||
return SDL_X11_HAVE_SHM; | |||
} | |||
return SDL_FALSE; | |||
} | |||
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#endif /* !NO_SHARED_MEMORY */ | |||
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int | |||
X11_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, | |||
void ** pixels, int *pitch) | |||
{ | |||
SDL_WindowData *data = (SDL_WindowData *) window->driverdata; | |||
Display *display = data->videodata->display; | |||
XGCValues gcv; | |||
XVisualInfo vinfo; | |||
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/* Free the old framebuffer surface */ | |||
X11_DestroyWindowFramebuffer(_this, window); | |||
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/* Create the graphics context for drawing */ | |||
gcv.graphics_exposures = False; | |||
data->gc = XCreateGC(display, data->xwindow, GCGraphicsExposures, &gcv); | |||
if (!data->gc) { | |||
SDL_SetError("Couldn't create graphics context"); | |||
return -1; | |||
} | |||
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/* Find out the pixel format and depth */ | |||
if (X11_GetVisualInfoFromVisual(display, data->visual, &vinfo) < 0) { | |||
SDL_SetError("Couldn't get window visual information"); | |||
return -1; | |||
} | |||
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*format = X11_GetPixelFormatFromVisualInfo(display, &vinfo); | |||
if (*format == SDL_PIXELFORMAT_UNKNOWN) { | |||
SDL_SetError("Unknown window pixel format"); | |||
return -1; | |||
} | |||
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/* Calculate pitch */ | |||
*pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3); | |||
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/* Create the actual image */ | |||
#ifndef NO_SHARED_MEMORY | |||
if (have_mitshm()) { | |||
XShmSegmentInfo *shminfo = &data->shminfo; | |||
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shminfo->shmid = shmget(IPC_PRIVATE, window->h*(*pitch), IPC_CREAT | 0777); | |||
if ( shminfo->shmid >= 0 ) { | |||
shminfo->shmaddr = (char *)shmat(shminfo->shmid, 0, 0); | |||
shminfo->readOnly = False; | |||
if ( shminfo->shmaddr != (char *)-1 ) { | |||
shm_error = False; | |||
X_handler = XSetErrorHandler(shm_errhandler); | |||
XShmAttach(display, shminfo); | |||
XSync(display, True); | |||
XSetErrorHandler(X_handler); | |||
if ( shm_error ) | |||
shmdt(shminfo->shmaddr); | |||
} else { | |||
shm_error = True; | |||
} | |||
shmctl(shminfo->shmid, IPC_RMID, NULL); | |||
} else { | |||
shm_error = True; | |||
} | |||
if (!shm_error) { | |||
data->ximage = XShmCreateImage(display, data->visual, | |||
vinfo.depth, ZPixmap, | |||
shminfo->shmaddr, shminfo, | |||
window->w, window->h); | |||
if (!data->ximage) { | |||
XShmDetach(display, shminfo); | |||
XSync(display, False); | |||
shmdt(shminfo->shmaddr); | |||
} else { | |||
/* Done! */ | |||
data->use_mitshm = SDL_TRUE; | |||
*pixels = shminfo->shmaddr; | |||
return 0; | |||
} | |||
} | |||
} | |||
#endif /* not NO_SHARED_MEMORY */ | |||
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*pixels = SDL_malloc(window->h*(*pitch)); | |||
if (*pixels == NULL) { | |||
SDL_OutOfMemory(); | |||
return -1; | |||
} | |||
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data->ximage = XCreateImage(display, data->visual, | |||
vinfo.depth, ZPixmap, 0, (char *)(*pixels), | |||
window->w, window->h, 32, 0); | |||
if (!data->ximage) { | |||
SDL_free(*pixels); | |||
SDL_SetError("Couldn't create XImage"); | |||
return -1; | |||
} | |||
return 0; | |||
} | |||
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int | |||
X11_UpdateWindowFramebuffer(_THIS, SDL_Window * window, | |||
int numrects, SDL_Rect * rects) | |||
{ | |||
SDL_WindowData *data = (SDL_WindowData *) window->driverdata; | |||
Display *display = data->videodata->display; | |||
int i; | |||
SDL_Rect *rect; | |||
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#ifndef NO_SHARED_MEMORY | |||
if (data->use_mitshm) { | |||
for (i = 0; i < numrects; ++i) { | |||
rect = &rects[i]; | |||
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if (rect->w == 0 || rect->h == 0) { /* Clipped? */ | |||
continue; | |||
} | |||
XShmPutImage(display, data->xwindow, data->gc, data->ximage, | |||
rect->x, rect->y, | |||
rect->x, rect->y, rect->w, rect->h, False); | |||
} | |||
} | |||
else | |||
#endif /* !NO_SHARED_MEMORY */ | |||
{ | |||
for (i = 0; i < numrects; ++i) { | |||
rect = &rects[i]; | |||
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if (rect->w == 0 || rect->h == 0) { /* Clipped? */ | |||
continue; | |||
} | |||
XPutImage(display, data->xwindow, data->gc, data->ximage, | |||
rect->x, rect->y, | |||
rect->x, rect->y, rect->w, rect->h); | |||
} | |||
} | |||
XSync(display, False); | |||
} | |||
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void | |||
X11_DestroyWindowFramebuffer(_THIS, SDL_Window * window) | |||
{ | |||
SDL_WindowData *data = (SDL_WindowData *) window->driverdata; | |||
Display *display = data->videodata->display; | |||
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if (data->ximage) { | |||
XDestroyImage(data->ximage); | |||
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#ifndef NO_SHARED_MEMORY | |||
if (data->use_mitshm) { | |||
XShmDetach(display, &data->shminfo); | |||
XSync(display, False); | |||
shmdt(data->shminfo.shmaddr); | |||
data->use_mitshm = SDL_FALSE; | |||
} | |||
#endif /* !NO_SHARED_MEMORY */ | |||
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data->ximage = NULL; | |||
} | |||
if (data->gc) { | |||
XFreeGC(display, data->gc); | |||
data->gc = NULL; | |||
} | |||
} | |||
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/* vi: set ts=4 sw=4 expandtab: */ |
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Original file line number | Original file line | Diff line number | Diff line change |
---|---|---|---|
@@ -0,0 +1,32 @@ | |||
/* | |||
SDL - Simple DirectMedia Layer | |||
Copyright (C) 1997-2009 Sam Lantinga | |||
This library is free software; you can redistribute it and/or | |||
modify it under the terms of the GNU Lesser General Public | |||
License as published by the Free Software Foundation; either | |||
version 2.1 of the License, or (at your option) any later version. | |||
This library is distributed in the hope that it will be useful, | |||
but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |||
Lesser General Public License for more details. | |||
You should have received a copy of the GNU Lesser General Public | |||
License along with this library; if not, write to the Free Software | |||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |||
Sam Lantinga | |||
slouken@libsdl.org | |||
*/ | |||
#include "SDL_config.h" | |||
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extern int X11_CreateWindowFramebuffer(_THIS, SDL_Window * window, | |||
Uint32 * format, | |||
void ** pixels, int *pitch); | |||
extern int X11_UpdateWindowFramebuffer(_THIS, SDL_Window * window, | |||
int numrects, SDL_Rect * rects); | |||
extern void X11_DestroyWindowFramebuffer(_THIS, SDL_Window * window); | |||
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/* vi: set ts=4 sw=4 expandtab: */ |
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