Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | 045f186426e1 |
| children | 3692456e7b0f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #include <stdlib.h> | |
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24 #include <unistd.h> |
| 0 | 25 |
| 26 #include "SDL_error.h" | |
| 27 #include "SDL_endian.h" | |
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28 #include "SDL_events_c.h" |
| 0 | 29 #include "SDL_x11image_c.h" |
| 30 | |
| 31 #ifndef NO_SHARED_MEMORY | |
| 32 | |
| 33 /* Shared memory error handler routine */ | |
| 34 static int shm_error; | |
| 35 static int (*X_handler)(Display *, XErrorEvent *) = NULL; | |
| 36 static int shm_errhandler(Display *d, XErrorEvent *e) | |
| 37 { | |
| 38 if ( e->error_code == BadAccess ) { | |
|
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39 shm_error = True; |
| 0 | 40 return(0); |
| 41 } else | |
| 42 return(X_handler(d,e)); | |
| 43 } | |
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44 |
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45 static void try_mitshm(_THIS, SDL_Surface *screen) |
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46 { |
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47 if(!use_mitshm) |
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48 return; |
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49 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
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50 IPC_CREAT | 0777); |
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51 if ( shminfo.shmid >= 0 ) { |
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52 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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53 shminfo.readOnly = False; |
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54 if ( shminfo.shmaddr != (char *)-1 ) { |
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55 shm_error = False; |
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56 X_handler = pXSetErrorHandler(shm_errhandler); |
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57 pXShmAttach(SDL_Display, &shminfo); |
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58 pXSync(SDL_Display, True); |
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59 pXSetErrorHandler(X_handler); |
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60 if ( shm_error ) |
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61 shmdt(shminfo.shmaddr); |
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62 } else { |
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63 shm_error = True; |
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64 } |
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65 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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66 } else { |
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67 shm_error = True; |
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68 } |
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69 if ( shm_error ) |
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70 use_mitshm = 0; |
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71 if ( use_mitshm ) |
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72 screen->pixels = shminfo.shmaddr; |
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73 } |
| 0 | 74 #endif /* ! NO_SHARED_MEMORY */ |
| 75 | |
| 76 /* Various screen update functions available */ | |
| 77 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 78 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 79 | |
| 80 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 81 { | |
|
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82 #ifndef NO_SHARED_MEMORY |
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83 try_mitshm(this, screen); |
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84 if(use_mitshm) { |
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85 SDL_Ximage = pXShmCreateImage(SDL_Display, SDL_Visual, |
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86 this->hidden->depth, ZPixmap, |
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87 shminfo.shmaddr, &shminfo, |
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88 screen->w, screen->h); |
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89 if(!SDL_Ximage) { |
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90 pXShmDetach(SDL_Display, &shminfo); |
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91 pXSync(SDL_Display, False); |
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92 shmdt(shminfo.shmaddr); |
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93 screen->pixels = NULL; |
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94 goto error; |
| 0 | 95 } |
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96 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 97 } |
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98 if(!use_mitshm) |
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99 #endif /* not NO_SHARED_MEMORY */ |
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100 { |
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101 int bpp; |
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102 screen->pixels = malloc(screen->h*screen->pitch); |
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103 if ( screen->pixels == NULL ) { |
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104 SDL_OutOfMemory(); |
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105 return -1; |
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106 } |
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107 bpp = screen->format->BytesPerPixel; |
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108 SDL_Ximage = pXCreateImage(SDL_Display, SDL_Visual, |
| 0 | 109 this->hidden->depth, ZPixmap, 0, |
| 110 (char *)screen->pixels, | |
| 111 screen->w, screen->h, | |
|
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112 32, 0); |
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113 if ( SDL_Ximage == NULL ) |
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114 goto error; |
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115 /* XPutImage will convert byte sex automatically */ |
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116 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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117 ? MSBFirst : LSBFirst; |
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118 this->UpdateRects = X11_NormalUpdate; |
| 0 | 119 } |
| 120 screen->pitch = SDL_Ximage->bytes_per_line; | |
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121 return(0); |
| 0 | 122 |
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123 error: |
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124 SDL_SetError("Couldn't create XImage"); |
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125 return 1; |
| 0 | 126 } |
| 127 | |
| 128 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 129 { | |
| 130 if ( SDL_Ximage ) { | |
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131 pXDestroyImage(SDL_Ximage); |
| 0 | 132 #ifndef NO_SHARED_MEMORY |
| 133 if ( use_mitshm ) { | |
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134 pXShmDetach(SDL_Display, &shminfo); |
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135 pXSync(SDL_Display, False); |
| 0 | 136 shmdt(shminfo.shmaddr); |
| 137 } | |
| 138 #endif /* ! NO_SHARED_MEMORY */ | |
| 139 SDL_Ximage = NULL; | |
| 140 } | |
| 141 if ( screen ) { | |
| 142 screen->pixels = NULL; | |
| 143 } | |
| 144 } | |
| 145 | |
|
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146 /* Determine the number of CPUs in the system */ |
| 0 | 147 static int num_CPU(void) |
| 148 { | |
| 149 static int num_cpus = 0; | |
| 150 | |
| 151 if(!num_cpus) { | |
|
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152 #if defined(__linux) |
| 0 | 153 char line[BUFSIZ]; |
| 154 FILE *pstat = fopen("/proc/stat", "r"); | |
| 155 if ( pstat ) { | |
| 156 while ( fgets(line, sizeof(line), pstat) ) { | |
| 157 if (memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { | |
| 158 ++num_cpus; | |
| 159 } | |
| 160 } | |
| 161 fclose(pstat); | |
| 162 } | |
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163 #elif defined(__sgi) |
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164 num_cpus = sysconf(_SC_NPROC_ONLN); |
|
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165 #elif defined(_SC_NPROCESSORS_ONLN) |
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166 /* number of processors online (SVR4.0MP compliant machines) */ |
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167 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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168 #elif defined(_SC_NPROCESSORS_CONF) |
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169 /* number of processors configured (SVR4.0MP compliant machines) */ |
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170 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 171 #endif |
| 172 if ( num_cpus <= 0 ) { | |
| 173 num_cpus = 1; | |
| 174 } | |
| 175 } | |
| 176 return num_cpus; | |
| 177 } | |
| 178 | |
| 179 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 180 { | |
| 181 int retval; | |
| 182 | |
| 183 X11_DestroyImage(this, screen); | |
| 184 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 185 retval = 0; | |
| 186 } else { | |
| 187 retval = X11_SetupImage(this, screen); | |
| 188 /* We support asynchronous blitting on the display */ | |
| 189 if ( flags & SDL_ASYNCBLIT ) { | |
| 190 /* This is actually slower on single-CPU systems, | |
| 191 probably because of CPU contention between the | |
| 192 X server and the application. | |
| 193 Note: Is this still true with XFree86 4.0? | |
| 194 */ | |
| 195 if ( num_CPU() > 1 ) { | |
| 196 screen->flags |= SDL_ASYNCBLIT; | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 return(retval); | |
| 201 } | |
| 202 | |
| 203 /* We don't actually allow hardware surfaces other than the main one */ | |
| 204 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 205 { | |
| 206 return(-1); | |
| 207 } | |
| 208 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 209 { | |
| 210 return; | |
| 211 } | |
| 212 | |
| 213 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 214 { | |
| 215 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
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216 pXSync(GFX_Display, False); |
| 0 | 217 blit_queued = 0; |
| 218 } | |
| 219 return(0); | |
| 220 } | |
| 221 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 222 { | |
| 223 return; | |
| 224 } | |
| 225 | |
| 226 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 227 { | |
| 228 return(0); | |
| 229 } | |
| 230 | |
| 231 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 232 { | |
| 233 int i; | |
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234 |
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235 for (i = 0; i < numrects; ++i) { |
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236 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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237 continue; |
| 0 | 238 } |
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239 pXPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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240 rects[i].x, rects[i].y, |
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241 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 242 } |
| 243 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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244 pXFlush(GFX_Display); |
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245 blit_queued = 1; |
| 0 | 246 } else { |
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247 pXSync(GFX_Display, False); |
| 0 | 248 } |
| 249 } | |
| 250 | |
| 251 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 252 { | |
| 253 #ifndef NO_SHARED_MEMORY | |
| 254 int i; | |
| 255 | |
| 256 for ( i=0; i<numrects; ++i ) { | |
|
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257 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 258 continue; |
| 259 } | |
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260 pXShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 261 rects[i].x, rects[i].y, |
| 262 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 263 False); | |
| 264 } | |
| 265 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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266 pXFlush(GFX_Display); |
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267 blit_queued = 1; |
| 0 | 268 } else { |
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269 pXSync(GFX_Display, False); |
| 0 | 270 } |
| 271 #endif /* ! NO_SHARED_MEMORY */ | |
| 272 } | |
| 273 | |
| 274 /* There's a problem with the automatic refreshing of the display. | |
| 275 Even though the XVideo code uses the GFX_Display to update the | |
| 276 video memory, it appears that updating the window asynchronously | |
| 277 from a different thread will cause "blackouts" of the window. | |
| 278 This is a sort of a hacked workaround for the problem. | |
| 279 */ | |
| 280 static int enable_autorefresh = 1; | |
| 281 | |
| 282 void X11_DisableAutoRefresh(_THIS) | |
| 283 { | |
| 284 --enable_autorefresh; | |
| 285 } | |
| 286 | |
| 287 void X11_EnableAutoRefresh(_THIS) | |
| 288 { | |
| 289 ++enable_autorefresh; | |
| 290 } | |
| 291 | |
| 292 void X11_RefreshDisplay(_THIS) | |
| 293 { | |
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294 /* Don't refresh a display that doesn't have an image (like GL) |
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295 Instead, post an expose event so the application can refresh. |
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296 */ |
| 0 | 297 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
|
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298 SDL_PrivateExpose(); |
| 0 | 299 return; |
| 300 } | |
| 301 #ifndef NO_SHARED_MEMORY | |
| 302 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
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303 pXShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 304 0, 0, 0, 0, this->screen->w, this->screen->h, |
| 305 False); | |
|
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306 } else |
| 0 | 307 #endif /* ! NO_SHARED_MEMORY */ |
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308 { |
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309 pXPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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310 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 311 } |
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312 pXSync(SDL_Display, False); |
| 0 | 313 } |