Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 604d73db6802 |
| children | 19418e4422cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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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 | |
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23 #include <stdio.h> |
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24 #include <unistd.h> |
| 0 | 25 |
| 26 #include "SDL_endian.h" | |
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27 #include "SDL_events_c.h" |
| 0 | 28 #include "SDL_x11image_c.h" |
| 29 | |
| 30 #ifndef NO_SHARED_MEMORY | |
| 31 | |
| 32 /* Shared memory error handler routine */ | |
| 33 static int shm_error; | |
| 34 static int (*X_handler)(Display *, XErrorEvent *) = NULL; | |
| 35 static int shm_errhandler(Display *d, XErrorEvent *e) | |
| 36 { | |
| 37 if ( e->error_code == BadAccess ) { | |
|
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38 shm_error = True; |
| 0 | 39 return(0); |
| 40 } else | |
| 41 return(X_handler(d,e)); | |
| 42 } | |
|
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43 |
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44 static void try_mitshm(_THIS, SDL_Surface *screen) |
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45 { |
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46 if(!use_mitshm) |
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47 return; |
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48 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
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49 IPC_CREAT | 0777); |
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50 if ( shminfo.shmid >= 0 ) { |
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51 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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52 shminfo.readOnly = False; |
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53 if ( shminfo.shmaddr != (char *)-1 ) { |
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54 shm_error = False; |
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55 X_handler = pXSetErrorHandler(shm_errhandler); |
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56 pXShmAttach(SDL_Display, &shminfo); |
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57 pXSync(SDL_Display, True); |
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58 pXSetErrorHandler(X_handler); |
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59 if ( shm_error ) |
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60 shmdt(shminfo.shmaddr); |
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61 } else { |
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62 shm_error = True; |
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63 } |
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64 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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65 } else { |
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66 shm_error = True; |
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67 } |
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68 if ( shm_error ) |
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69 use_mitshm = 0; |
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70 if ( use_mitshm ) |
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71 screen->pixels = shminfo.shmaddr; |
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72 } |
| 0 | 73 #endif /* ! NO_SHARED_MEMORY */ |
| 74 | |
| 75 /* Various screen update functions available */ | |
| 76 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 77 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 78 | |
| 79 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 80 { | |
|
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81 #ifndef NO_SHARED_MEMORY |
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82 try_mitshm(this, screen); |
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83 if(use_mitshm) { |
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84 SDL_Ximage = pXShmCreateImage(SDL_Display, SDL_Visual, |
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85 this->hidden->depth, ZPixmap, |
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86 shminfo.shmaddr, &shminfo, |
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87 screen->w, screen->h); |
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88 if(!SDL_Ximage) { |
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89 pXShmDetach(SDL_Display, &shminfo); |
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90 pXSync(SDL_Display, False); |
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91 shmdt(shminfo.shmaddr); |
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92 screen->pixels = NULL; |
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93 goto error; |
| 0 | 94 } |
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95 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 96 } |
|
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97 if(!use_mitshm) |
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98 #endif /* not NO_SHARED_MEMORY */ |
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99 { |
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100 int bpp; |
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101 screen->pixels = SDL_malloc(screen->h*screen->pitch); |
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102 if ( screen->pixels == NULL ) { |
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103 SDL_OutOfMemory(); |
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104 return -1; |
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105 } |
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106 bpp = screen->format->BytesPerPixel; |
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107 SDL_Ximage = pXCreateImage(SDL_Display, SDL_Visual, |
| 0 | 108 this->hidden->depth, ZPixmap, 0, |
| 109 (char *)screen->pixels, | |
| 110 screen->w, screen->h, | |
|
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111 32, 0); |
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112 if ( SDL_Ximage == NULL ) |
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113 goto error; |
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114 /* XPutImage will convert byte sex automatically */ |
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115 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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116 ? MSBFirst : LSBFirst; |
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117 this->UpdateRects = X11_NormalUpdate; |
| 0 | 118 } |
| 119 screen->pitch = SDL_Ximage->bytes_per_line; | |
|
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120 return(0); |
| 0 | 121 |
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122 error: |
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123 SDL_SetError("Couldn't create XImage"); |
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124 return 1; |
| 0 | 125 } |
| 126 | |
| 127 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 128 { | |
| 129 if ( SDL_Ximage ) { | |
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130 pXDestroyImage(SDL_Ximage); |
| 0 | 131 #ifndef NO_SHARED_MEMORY |
| 132 if ( use_mitshm ) { | |
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133 pXShmDetach(SDL_Display, &shminfo); |
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134 pXSync(SDL_Display, False); |
| 0 | 135 shmdt(shminfo.shmaddr); |
| 136 } | |
| 137 #endif /* ! NO_SHARED_MEMORY */ | |
| 138 SDL_Ximage = NULL; | |
| 139 } | |
| 140 if ( screen ) { | |
| 141 screen->pixels = NULL; | |
| 142 } | |
| 143 } | |
| 144 | |
|
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145 /* Determine the number of CPUs in the system */ |
| 0 | 146 static int num_CPU(void) |
| 147 { | |
| 148 static int num_cpus = 0; | |
| 149 | |
| 150 if(!num_cpus) { | |
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151 #if defined(__linux) |
| 0 | 152 char line[BUFSIZ]; |
| 153 FILE *pstat = fopen("/proc/stat", "r"); | |
| 154 if ( pstat ) { | |
| 155 while ( fgets(line, sizeof(line), pstat) ) { | |
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156 if (SDL_memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { |
| 0 | 157 ++num_cpus; |
| 158 } | |
| 159 } | |
| 160 fclose(pstat); | |
| 161 } | |
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162 #elif defined(__sgi) |
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163 num_cpus = sysconf(_SC_NPROC_ONLN); |
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166
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164 #elif defined(_SC_NPROCESSORS_ONLN) |
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165 /* number of processors online (SVR4.0MP compliant machines) */ |
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166 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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167 #elif defined(_SC_NPROCESSORS_CONF) |
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168 /* number of processors configured (SVR4.0MP compliant machines) */ |
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169 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 170 #endif |
| 171 if ( num_cpus <= 0 ) { | |
| 172 num_cpus = 1; | |
| 173 } | |
| 174 } | |
| 175 return num_cpus; | |
| 176 } | |
| 177 | |
| 178 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 179 { | |
| 180 int retval; | |
| 181 | |
| 182 X11_DestroyImage(this, screen); | |
| 183 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 184 retval = 0; | |
| 185 } else { | |
| 186 retval = X11_SetupImage(this, screen); | |
| 187 /* We support asynchronous blitting on the display */ | |
| 188 if ( flags & SDL_ASYNCBLIT ) { | |
| 189 /* This is actually slower on single-CPU systems, | |
| 190 probably because of CPU contention between the | |
| 191 X server and the application. | |
| 192 Note: Is this still true with XFree86 4.0? | |
| 193 */ | |
| 194 if ( num_CPU() > 1 ) { | |
| 195 screen->flags |= SDL_ASYNCBLIT; | |
| 196 } | |
| 197 } | |
| 198 } | |
| 199 return(retval); | |
| 200 } | |
| 201 | |
| 202 /* We don't actually allow hardware surfaces other than the main one */ | |
| 203 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 204 { | |
| 205 return(-1); | |
| 206 } | |
| 207 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 208 { | |
| 209 return; | |
| 210 } | |
| 211 | |
| 212 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 213 { | |
| 214 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
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215 pXSync(GFX_Display, False); |
| 0 | 216 blit_queued = 0; |
| 217 } | |
| 218 return(0); | |
| 219 } | |
| 220 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 221 { | |
| 222 return; | |
| 223 } | |
| 224 | |
| 225 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 226 { | |
| 227 return(0); | |
| 228 } | |
| 229 | |
| 230 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 231 { | |
| 232 int i; | |
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233 |
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234 for (i = 0; i < numrects; ++i) { |
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235 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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236 continue; |
| 0 | 237 } |
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238 pXPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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270
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239 rects[i].x, rects[i].y, |
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240 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 241 } |
| 242 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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243 pXFlush(GFX_Display); |
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270
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244 blit_queued = 1; |
| 0 | 245 } else { |
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246 pXSync(GFX_Display, False); |
| 0 | 247 } |
| 248 } | |
| 249 | |
| 250 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 251 { | |
| 252 #ifndef NO_SHARED_MEMORY | |
| 253 int i; | |
| 254 | |
| 255 for ( i=0; i<numrects; ++i ) { | |
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270
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256 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 257 continue; |
| 258 } | |
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259 pXShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 260 rects[i].x, rects[i].y, |
| 261 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 262 False); | |
| 263 } | |
| 264 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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265 pXFlush(GFX_Display); |
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270
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266 blit_queued = 1; |
| 0 | 267 } else { |
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268 pXSync(GFX_Display, False); |
| 0 | 269 } |
| 270 #endif /* ! NO_SHARED_MEMORY */ | |
| 271 } | |
| 272 | |
| 273 /* There's a problem with the automatic refreshing of the display. | |
| 274 Even though the XVideo code uses the GFX_Display to update the | |
| 275 video memory, it appears that updating the window asynchronously | |
| 276 from a different thread will cause "blackouts" of the window. | |
| 277 This is a sort of a hacked workaround for the problem. | |
| 278 */ | |
| 279 static int enable_autorefresh = 1; | |
| 280 | |
| 281 void X11_DisableAutoRefresh(_THIS) | |
| 282 { | |
| 283 --enable_autorefresh; | |
| 284 } | |
| 285 | |
| 286 void X11_EnableAutoRefresh(_THIS) | |
| 287 { | |
| 288 ++enable_autorefresh; | |
| 289 } | |
| 290 | |
| 291 void X11_RefreshDisplay(_THIS) | |
| 292 { | |
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293 /* Don't refresh a display that doesn't have an image (like GL) |
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294 Instead, post an expose event so the application can refresh. |
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295 */ |
| 0 | 296 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
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297 SDL_PrivateExpose(); |
| 0 | 298 return; |
| 299 } | |
| 300 #ifndef NO_SHARED_MEMORY | |
| 301 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
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302 pXShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 303 0, 0, 0, 0, this->screen->w, this->screen->h, |
| 304 False); | |
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305 } else |
| 0 | 306 #endif /* ! NO_SHARED_MEMORY */ |
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307 { |
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308 pXPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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309 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 310 } |
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311 pXSync(SDL_Display, False); |
| 0 | 312 } |