Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 264:c9cd3b564e4b
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 14 Jan 2002 19:20:39 +0000 |
| parents | e8157fcb3114 |
| children | 37fa1484f71b |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga | |
| 4 | |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdlib.h> | |
|
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29 #include <unistd.h> |
| 0 | 30 |
| 31 #include "SDL_error.h" | |
| 32 #include "SDL_endian.h" | |
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33 #include "SDL_events_c.h" |
| 0 | 34 #include "SDL_x11image_c.h" |
| 35 | |
| 36 #ifndef NO_SHARED_MEMORY | |
| 37 | |
| 38 /* Shared memory information */ | |
| 39 extern int XShmQueryExtension(Display *dpy); /* Not in X11 headers */ | |
| 40 | |
| 41 /* Shared memory error handler routine */ | |
| 42 static int shm_error; | |
| 43 static int (*X_handler)(Display *, XErrorEvent *) = NULL; | |
| 44 static int shm_errhandler(Display *d, XErrorEvent *e) | |
| 45 { | |
| 46 if ( e->error_code == BadAccess ) { | |
| 47 ++shm_error; | |
| 48 return(0); | |
| 49 } else | |
| 50 return(X_handler(d,e)); | |
| 51 } | |
| 52 #endif /* ! NO_SHARED_MEMORY */ | |
| 53 | |
| 54 /* Various screen update functions available */ | |
| 55 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 56 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 57 | |
| 58 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 59 { | |
| 60 #ifdef NO_SHARED_MEMORY | |
| 61 screen->pixels = malloc(screen->h*screen->pitch); | |
| 62 #else | |
| 63 /* Allocate shared memory if possible */ | |
| 64 if ( use_mitshm ) { | |
| 65 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, | |
| 66 IPC_CREAT|0777); | |
| 67 if ( shminfo.shmid >= 0 ) { | |
| 68 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); | |
| 69 shminfo.readOnly = False; | |
| 70 if ( shminfo.shmaddr != (char *)-1 ) { | |
| 71 shm_error = False; | |
| 72 X_handler = XSetErrorHandler(shm_errhandler); | |
| 73 XShmAttach(SDL_Display, &shminfo); | |
| 74 XSync(SDL_Display, True); | |
| 75 XSetErrorHandler(X_handler); | |
| 76 if ( shm_error == True ) | |
| 77 shmdt(shminfo.shmaddr); | |
| 78 } else { | |
| 79 shm_error = True; | |
| 80 } | |
| 81 shmctl(shminfo.shmid, IPC_RMID, NULL); | |
| 82 } else { | |
| 83 shm_error = True; | |
| 84 } | |
| 85 if ( shm_error == True ) | |
| 86 use_mitshm = 0; | |
| 87 } | |
| 88 if ( use_mitshm ) { | |
| 89 screen->pixels = shminfo.shmaddr; | |
| 90 } else { | |
| 91 screen->pixels = malloc(screen->h*screen->pitch); | |
| 92 } | |
| 93 #endif /* NO_SHARED_MEMORY */ | |
| 94 if ( screen->pixels == NULL ) { | |
| 95 SDL_OutOfMemory(); | |
| 96 return(-1); | |
| 97 } | |
| 98 | |
| 99 #ifdef NO_SHARED_MEMORY | |
| 100 { | |
| 101 int bpp = screen->format->BytesPerPixel; | |
| 102 SDL_Ximage = XCreateImage(SDL_Display, SDL_Visual, | |
| 103 this->hidden->depth, ZPixmap, 0, | |
| 104 (char *)screen->pixels, | |
| 105 screen->w, screen->h, | |
| 106 (bpp == 3) ? 32 : bpp * 8, | |
| 107 0); | |
| 108 } | |
| 109 #else | |
| 110 if ( use_mitshm ) { | |
| 111 SDL_Ximage = XShmCreateImage(SDL_Display, SDL_Visual, | |
| 112 this->hidden->depth, ZPixmap, | |
| 113 shminfo.shmaddr, &shminfo, | |
| 114 screen->w, screen->h); | |
| 115 } else { | |
| 116 int bpp = screen->format->BytesPerPixel; | |
| 117 SDL_Ximage = XCreateImage(SDL_Display, SDL_Visual, | |
| 118 this->hidden->depth, ZPixmap, 0, | |
| 119 (char *)screen->pixels, | |
| 120 screen->w, screen->h, | |
| 121 (bpp == 3) ? 32 : bpp * 8, | |
| 122 0); | |
| 123 } | |
| 124 #endif /* NO_SHARED_MEMORY */ | |
| 125 if ( SDL_Ximage == NULL ) { | |
| 126 SDL_SetError("Couldn't create XImage"); | |
| 127 #ifndef NO_SHARED_MEMORY | |
| 128 if ( use_mitshm ) { | |
| 129 XShmDetach(SDL_Display, &shminfo); | |
| 130 XSync(SDL_Display, False); | |
| 131 shmdt(shminfo.shmaddr); | |
| 132 screen->pixels = NULL; | |
| 133 } | |
| 134 #endif /* ! NO_SHARED_MEMORY */ | |
| 135 return(-1); | |
| 136 } | |
| 137 screen->pitch = SDL_Ximage->bytes_per_line; | |
| 138 | |
| 139 /* Determine what blit function to use */ | |
| 140 #ifdef NO_SHARED_MEMORY | |
| 141 this->UpdateRects = X11_NormalUpdate; | |
| 142 #else | |
| 143 if ( use_mitshm ) { | |
| 144 this->UpdateRects = X11_MITSHMUpdate; | |
| 145 } else { | |
| 146 this->UpdateRects = X11_NormalUpdate; | |
| 147 } | |
| 148 #endif | |
| 149 return(0); | |
| 150 } | |
| 151 | |
| 152 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 153 { | |
| 154 if ( SDL_Ximage ) { | |
| 155 XDestroyImage(SDL_Ximage); | |
| 156 #ifndef NO_SHARED_MEMORY | |
| 157 if ( use_mitshm ) { | |
| 158 XShmDetach(SDL_Display, &shminfo); | |
| 159 XSync(SDL_Display, False); | |
| 160 shmdt(shminfo.shmaddr); | |
| 161 } | |
| 162 #endif /* ! NO_SHARED_MEMORY */ | |
| 163 SDL_Ximage = NULL; | |
| 164 } | |
| 165 if ( screen ) { | |
| 166 screen->pixels = NULL; | |
| 167 } | |
| 168 } | |
| 169 | |
|
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170 /* Determine the number of CPUs in the system */ |
| 0 | 171 static int num_CPU(void) |
| 172 { | |
| 173 static int num_cpus = 0; | |
| 174 | |
| 175 if(!num_cpus) { | |
|
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176 #if defined(__linux) |
| 0 | 177 char line[BUFSIZ]; |
| 178 FILE *pstat = fopen("/proc/stat", "r"); | |
| 179 if ( pstat ) { | |
| 180 while ( fgets(line, sizeof(line), pstat) ) { | |
| 181 if (memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { | |
| 182 ++num_cpus; | |
| 183 } | |
| 184 } | |
| 185 fclose(pstat); | |
| 186 } | |
|
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187 #elif defined(_SC_NPROCESSORS_ONLN) |
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parents:
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188 /* number of processors online (SVR4.0MP compliant machines) */ |
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189 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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190 #elif defined(_SC_NPROCESSORS_CONF) |
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39877400bd1e
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parents:
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changeset
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191 /* number of processors configured (SVR4.0MP compliant machines) */ |
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39877400bd1e
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parents:
161
diff
changeset
|
192 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 193 #endif |
| 194 if ( num_cpus <= 0 ) { | |
| 195 num_cpus = 1; | |
| 196 } | |
| 197 } | |
| 198 return num_cpus; | |
| 199 } | |
| 200 | |
| 201 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 202 { | |
| 203 int retval; | |
| 204 | |
| 205 X11_DestroyImage(this, screen); | |
| 206 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 207 retval = 0; | |
| 208 } else { | |
| 209 retval = X11_SetupImage(this, screen); | |
| 210 /* We support asynchronous blitting on the display */ | |
| 211 if ( flags & SDL_ASYNCBLIT ) { | |
| 212 /* This is actually slower on single-CPU systems, | |
| 213 probably because of CPU contention between the | |
| 214 X server and the application. | |
| 215 Note: Is this still true with XFree86 4.0? | |
| 216 */ | |
| 217 if ( num_CPU() > 1 ) { | |
| 218 screen->flags |= SDL_ASYNCBLIT; | |
| 219 } | |
| 220 } | |
| 221 } | |
| 222 return(retval); | |
| 223 } | |
| 224 | |
| 225 /* We don't actually allow hardware surfaces other than the main one */ | |
| 226 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 227 { | |
| 228 return(-1); | |
| 229 } | |
| 230 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 231 { | |
| 232 return; | |
| 233 } | |
| 234 | |
| 235 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 236 { | |
| 237 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
| 238 XSync(GFX_Display, False); | |
| 239 blit_queued = 0; | |
| 240 } | |
| 241 return(0); | |
| 242 } | |
| 243 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 244 { | |
| 245 return; | |
| 246 } | |
| 247 | |
| 248 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 249 { | |
| 250 return(0); | |
| 251 } | |
| 252 | |
| 253 /* Byte-swap the pixels in the display image */ | |
| 254 static void X11_SwapAllPixels(SDL_Surface *screen) | |
| 255 { | |
| 256 int x, y; | |
| 257 | |
| 258 switch (screen->format->BytesPerPixel) { | |
| 259 case 2: { | |
| 260 Uint16 *spot; | |
| 261 for ( y=0; y<screen->h; ++y ) { | |
| 262 spot = (Uint16 *) ((Uint8 *)screen->pixels + | |
| 263 y * screen->pitch); | |
| 264 for ( x=0; x<screen->w; ++x, ++spot ) { | |
| 265 *spot = SDL_Swap16(*spot); | |
| 266 } | |
| 267 } | |
| 268 } | |
| 269 break; | |
| 270 | |
| 271 case 4: { | |
| 272 Uint32 *spot; | |
| 273 for ( y=0; y<screen->h; ++y ) { | |
| 274 spot = (Uint32 *) ((Uint8 *)screen->pixels + | |
| 275 y * screen->pitch); | |
| 276 for ( x=0; x<screen->w; ++x, ++spot ) { | |
| 277 *spot = SDL_Swap32(*spot); | |
| 278 } | |
| 279 } | |
| 280 } | |
| 281 break; | |
| 282 | |
| 283 default: | |
| 284 /* should never get here */ | |
| 285 break; | |
| 286 } | |
| 287 } | |
| 288 static void X11_SwapPixels(SDL_Surface *screen, SDL_Rect *rect) | |
| 289 { | |
| 290 int x, minx, maxx; | |
| 291 int y, miny, maxy; | |
| 292 | |
| 293 switch (screen->format->BytesPerPixel) { | |
| 294 case 2: { | |
| 295 Uint16 *spot; | |
| 296 minx = rect->x; | |
| 297 maxx = rect->x + rect->w; | |
| 298 miny = rect->y; | |
| 299 maxy = rect->y + rect->h; | |
| 300 for ( y=miny; y<maxy; ++y ) { | |
| 301 spot = (Uint16 *) ((Uint8 *)screen->pixels + | |
| 302 y * screen->pitch + minx * 2); | |
| 303 for ( x=minx; x<maxx; ++x, ++spot ) { | |
| 304 *spot = SDL_Swap16(*spot); | |
| 305 } | |
| 306 } | |
| 307 } | |
| 308 break; | |
| 309 | |
| 310 case 4: { | |
| 311 Uint32 *spot; | |
| 312 minx = rect->x; | |
| 313 maxx = rect->x + rect->w; | |
| 314 miny = rect->y; | |
| 315 maxy = rect->y + rect->h; | |
| 316 for ( y=miny; y<maxy; ++y ) { | |
| 317 spot = (Uint32 *) ((Uint8 *)screen->pixels + | |
| 318 y * screen->pitch + minx * 4); | |
| 319 for ( x=minx; x<maxx; ++x, ++spot ) { | |
| 320 *spot = SDL_Swap32(*spot); | |
| 321 } | |
| 322 } | |
| 323 } | |
| 324 break; | |
| 325 | |
| 326 default: | |
| 327 /* should never get here */ | |
| 328 break; | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 333 { | |
| 334 int i; | |
| 335 | |
| 336 /* Check for endian-swapped X server, swap if necessary (VERY slow!) */ | |
| 337 if ( swap_pixels && | |
| 338 ((this->screen->format->BytesPerPixel%2) == 0) ) { | |
| 339 for ( i=0; i<numrects; ++i ) { | |
| 340 if ( ! rects[i].w ) { /* Clipped? */ | |
| 341 continue; | |
| 342 } | |
| 343 X11_SwapPixels(this->screen, rects + i); | |
| 344 XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 345 rects[i].x, rects[i].y, | |
| 346 rects[i].x, rects[i].y, rects[i].w, rects[i].h); | |
| 347 X11_SwapPixels(this->screen, rects + i); | |
| 348 } | |
| 349 } else { | |
| 350 for ( i=0; i<numrects; ++i ) { | |
| 351 if ( ! rects[i].w ) { /* Clipped? */ | |
| 352 continue; | |
| 353 } | |
| 354 XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 355 rects[i].x, rects[i].y, | |
| 356 rects[i].x, rects[i].y, rects[i].w, rects[i].h); | |
| 357 } | |
| 358 } | |
| 359 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
| 360 XFlush(GFX_Display); | |
| 361 ++blit_queued; | |
| 362 } else { | |
| 363 XSync(GFX_Display, False); | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 368 { | |
| 369 #ifndef NO_SHARED_MEMORY | |
| 370 int i; | |
| 371 | |
| 372 for ( i=0; i<numrects; ++i ) { | |
| 373 if ( ! rects[i].w ) { /* Clipped? */ | |
| 374 continue; | |
| 375 } | |
| 376 XShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 377 rects[i].x, rects[i].y, | |
| 378 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 379 False); | |
| 380 } | |
| 381 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
| 382 XFlush(GFX_Display); | |
| 383 ++blit_queued; | |
| 384 } else { | |
| 385 XSync(GFX_Display, False); | |
| 386 } | |
| 387 #endif /* ! NO_SHARED_MEMORY */ | |
| 388 } | |
| 389 | |
| 390 /* There's a problem with the automatic refreshing of the display. | |
| 391 Even though the XVideo code uses the GFX_Display to update the | |
| 392 video memory, it appears that updating the window asynchronously | |
| 393 from a different thread will cause "blackouts" of the window. | |
| 394 This is a sort of a hacked workaround for the problem. | |
| 395 */ | |
| 396 static int enable_autorefresh = 1; | |
| 397 | |
| 398 void X11_DisableAutoRefresh(_THIS) | |
| 399 { | |
| 400 --enable_autorefresh; | |
| 401 } | |
| 402 | |
| 403 void X11_EnableAutoRefresh(_THIS) | |
| 404 { | |
| 405 ++enable_autorefresh; | |
| 406 } | |
| 407 | |
| 408 void X11_RefreshDisplay(_THIS) | |
| 409 { | |
|
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parents:
0
diff
changeset
|
410 /* Don't refresh a display that doesn't have an image (like GL) |
|
eb6b76a95f2d
An expose event is now sent when using XVideo output.
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
411 Instead, post an expose event so the application can refresh. |
|
eb6b76a95f2d
An expose event is now sent when using XVideo output.
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
412 */ |
| 0 | 413 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
|
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parents:
0
diff
changeset
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414 SDL_PrivateExpose(); |
| 0 | 415 return; |
| 416 } | |
| 417 #ifndef NO_SHARED_MEMORY | |
| 418 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
| 419 XShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 420 0, 0, 0, 0, this->screen->w, this->screen->h, | |
| 421 False); | |
| 422 } else { | |
| 423 #else | |
| 424 { | |
| 425 #endif /* ! NO_SHARED_MEMORY */ | |
| 426 /* Check for endian-swapped X server, swap if necessary */ | |
| 427 if ( swap_pixels && | |
| 428 ((this->screen->format->BytesPerPixel%2) == 0) ) { | |
| 429 X11_SwapAllPixels(this->screen); | |
| 430 XPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 431 0, 0, 0, 0, this->screen->w, this->screen->h); | |
| 432 X11_SwapAllPixels(this->screen); | |
| 433 } else { | |
| 434 XPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 435 0, 0, 0, 0, this->screen->w, this->screen->h); | |
| 436 } | |
| 437 } | |
| 438 XSync(SDL_Display, False); | |
| 439 } |