Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 1338:604d73db6802
Removed uses of stdlib.h and string.h
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 09:29:18 +0000 |
| parents | 3692456e7b0f |
| children | c71e05b4dc2e |
| 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 |
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26 #include "SDL_stdlib.h" |
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27 #include "SDL_string.h" |
| 0 | 28 #include "SDL_error.h" |
| 29 #include "SDL_endian.h" | |
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30 #include "SDL_events_c.h" |
| 0 | 31 #include "SDL_x11image_c.h" |
| 32 | |
| 33 #ifndef NO_SHARED_MEMORY | |
| 34 | |
| 35 /* Shared memory error handler routine */ | |
| 36 static int shm_error; | |
| 37 static int (*X_handler)(Display *, XErrorEvent *) = NULL; | |
| 38 static int shm_errhandler(Display *d, XErrorEvent *e) | |
| 39 { | |
| 40 if ( e->error_code == BadAccess ) { | |
|
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41 shm_error = True; |
| 0 | 42 return(0); |
| 43 } else | |
| 44 return(X_handler(d,e)); | |
| 45 } | |
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46 |
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47 static void try_mitshm(_THIS, SDL_Surface *screen) |
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48 { |
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49 if(!use_mitshm) |
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50 return; |
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51 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
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52 IPC_CREAT | 0777); |
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53 if ( shminfo.shmid >= 0 ) { |
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54 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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55 shminfo.readOnly = False; |
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56 if ( shminfo.shmaddr != (char *)-1 ) { |
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57 shm_error = False; |
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58 X_handler = pXSetErrorHandler(shm_errhandler); |
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59 pXShmAttach(SDL_Display, &shminfo); |
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60 pXSync(SDL_Display, True); |
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61 pXSetErrorHandler(X_handler); |
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62 if ( shm_error ) |
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63 shmdt(shminfo.shmaddr); |
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64 } else { |
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65 shm_error = True; |
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66 } |
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67 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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68 } else { |
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69 shm_error = True; |
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70 } |
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71 if ( shm_error ) |
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72 use_mitshm = 0; |
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73 if ( use_mitshm ) |
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74 screen->pixels = shminfo.shmaddr; |
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75 } |
| 0 | 76 #endif /* ! NO_SHARED_MEMORY */ |
| 77 | |
| 78 /* Various screen update functions available */ | |
| 79 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 80 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 81 | |
| 82 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 83 { | |
|
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84 #ifndef NO_SHARED_MEMORY |
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85 try_mitshm(this, screen); |
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86 if(use_mitshm) { |
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87 SDL_Ximage = pXShmCreateImage(SDL_Display, SDL_Visual, |
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88 this->hidden->depth, ZPixmap, |
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89 shminfo.shmaddr, &shminfo, |
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90 screen->w, screen->h); |
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91 if(!SDL_Ximage) { |
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92 pXShmDetach(SDL_Display, &shminfo); |
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93 pXSync(SDL_Display, False); |
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94 shmdt(shminfo.shmaddr); |
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95 screen->pixels = NULL; |
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96 goto error; |
| 0 | 97 } |
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98 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 99 } |
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100 if(!use_mitshm) |
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101 #endif /* not NO_SHARED_MEMORY */ |
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102 { |
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103 int bpp; |
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104 screen->pixels = SDL_malloc(screen->h*screen->pitch); |
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105 if ( screen->pixels == NULL ) { |
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106 SDL_OutOfMemory(); |
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107 return -1; |
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108 } |
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109 bpp = screen->format->BytesPerPixel; |
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110 SDL_Ximage = pXCreateImage(SDL_Display, SDL_Visual, |
| 0 | 111 this->hidden->depth, ZPixmap, 0, |
| 112 (char *)screen->pixels, | |
| 113 screen->w, screen->h, | |
|
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114 32, 0); |
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115 if ( SDL_Ximage == NULL ) |
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116 goto error; |
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117 /* XPutImage will convert byte sex automatically */ |
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118 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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119 ? MSBFirst : LSBFirst; |
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120 this->UpdateRects = X11_NormalUpdate; |
| 0 | 121 } |
| 122 screen->pitch = SDL_Ximage->bytes_per_line; | |
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123 return(0); |
| 0 | 124 |
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125 error: |
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126 SDL_SetError("Couldn't create XImage"); |
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127 return 1; |
| 0 | 128 } |
| 129 | |
| 130 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 131 { | |
| 132 if ( SDL_Ximage ) { | |
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133 pXDestroyImage(SDL_Ximage); |
| 0 | 134 #ifndef NO_SHARED_MEMORY |
| 135 if ( use_mitshm ) { | |
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136 pXShmDetach(SDL_Display, &shminfo); |
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137 pXSync(SDL_Display, False); |
| 0 | 138 shmdt(shminfo.shmaddr); |
| 139 } | |
| 140 #endif /* ! NO_SHARED_MEMORY */ | |
| 141 SDL_Ximage = NULL; | |
| 142 } | |
| 143 if ( screen ) { | |
| 144 screen->pixels = NULL; | |
| 145 } | |
| 146 } | |
| 147 | |
|
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148 /* Determine the number of CPUs in the system */ |
| 0 | 149 static int num_CPU(void) |
| 150 { | |
| 151 static int num_cpus = 0; | |
| 152 | |
| 153 if(!num_cpus) { | |
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154 #if defined(__linux) |
| 0 | 155 char line[BUFSIZ]; |
| 156 FILE *pstat = fopen("/proc/stat", "r"); | |
| 157 if ( pstat ) { | |
| 158 while ( fgets(line, sizeof(line), pstat) ) { | |
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159 if (SDL_memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { |
| 0 | 160 ++num_cpus; |
| 161 } | |
| 162 } | |
| 163 fclose(pstat); | |
| 164 } | |
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165 #elif defined(__sgi) |
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166 num_cpus = sysconf(_SC_NPROC_ONLN); |
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167 #elif defined(_SC_NPROCESSORS_ONLN) |
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168 /* number of processors online (SVR4.0MP compliant machines) */ |
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169 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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170 #elif defined(_SC_NPROCESSORS_CONF) |
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171 /* number of processors configured (SVR4.0MP compliant machines) */ |
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172 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 173 #endif |
| 174 if ( num_cpus <= 0 ) { | |
| 175 num_cpus = 1; | |
| 176 } | |
| 177 } | |
| 178 return num_cpus; | |
| 179 } | |
| 180 | |
| 181 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 182 { | |
| 183 int retval; | |
| 184 | |
| 185 X11_DestroyImage(this, screen); | |
| 186 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 187 retval = 0; | |
| 188 } else { | |
| 189 retval = X11_SetupImage(this, screen); | |
| 190 /* We support asynchronous blitting on the display */ | |
| 191 if ( flags & SDL_ASYNCBLIT ) { | |
| 192 /* This is actually slower on single-CPU systems, | |
| 193 probably because of CPU contention between the | |
| 194 X server and the application. | |
| 195 Note: Is this still true with XFree86 4.0? | |
| 196 */ | |
| 197 if ( num_CPU() > 1 ) { | |
| 198 screen->flags |= SDL_ASYNCBLIT; | |
| 199 } | |
| 200 } | |
| 201 } | |
| 202 return(retval); | |
| 203 } | |
| 204 | |
| 205 /* We don't actually allow hardware surfaces other than the main one */ | |
| 206 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 207 { | |
| 208 return(-1); | |
| 209 } | |
| 210 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 211 { | |
| 212 return; | |
| 213 } | |
| 214 | |
| 215 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 216 { | |
| 217 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
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218 pXSync(GFX_Display, False); |
| 0 | 219 blit_queued = 0; |
| 220 } | |
| 221 return(0); | |
| 222 } | |
| 223 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 224 { | |
| 225 return; | |
| 226 } | |
| 227 | |
| 228 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 229 { | |
| 230 return(0); | |
| 231 } | |
| 232 | |
| 233 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 234 { | |
| 235 int i; | |
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236 |
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237 for (i = 0; i < numrects; ++i) { |
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238 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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239 continue; |
| 0 | 240 } |
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241 pXPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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242 rects[i].x, rects[i].y, |
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243 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 244 } |
| 245 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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246 pXFlush(GFX_Display); |
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247 blit_queued = 1; |
| 0 | 248 } else { |
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249 pXSync(GFX_Display, False); |
| 0 | 250 } |
| 251 } | |
| 252 | |
| 253 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 254 { | |
| 255 #ifndef NO_SHARED_MEMORY | |
| 256 int i; | |
| 257 | |
| 258 for ( i=0; i<numrects; ++i ) { | |
|
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259 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 260 continue; |
| 261 } | |
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262 pXShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 263 rects[i].x, rects[i].y, |
| 264 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 265 False); | |
| 266 } | |
| 267 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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268 pXFlush(GFX_Display); |
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269 blit_queued = 1; |
| 0 | 270 } else { |
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271 pXSync(GFX_Display, False); |
| 0 | 272 } |
| 273 #endif /* ! NO_SHARED_MEMORY */ | |
| 274 } | |
| 275 | |
| 276 /* There's a problem with the automatic refreshing of the display. | |
| 277 Even though the XVideo code uses the GFX_Display to update the | |
| 278 video memory, it appears that updating the window asynchronously | |
| 279 from a different thread will cause "blackouts" of the window. | |
| 280 This is a sort of a hacked workaround for the problem. | |
| 281 */ | |
| 282 static int enable_autorefresh = 1; | |
| 283 | |
| 284 void X11_DisableAutoRefresh(_THIS) | |
| 285 { | |
| 286 --enable_autorefresh; | |
| 287 } | |
| 288 | |
| 289 void X11_EnableAutoRefresh(_THIS) | |
| 290 { | |
| 291 ++enable_autorefresh; | |
| 292 } | |
| 293 | |
| 294 void X11_RefreshDisplay(_THIS) | |
| 295 { | |
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296 /* Don't refresh a display that doesn't have an image (like GL) |
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297 Instead, post an expose event so the application can refresh. |
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298 */ |
| 0 | 299 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
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300 SDL_PrivateExpose(); |
| 0 | 301 return; |
| 302 } | |
| 303 #ifndef NO_SHARED_MEMORY | |
| 304 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
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305 pXShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 306 0, 0, 0, 0, this->screen->w, this->screen->h, |
| 307 False); | |
|
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308 } else |
| 0 | 309 #endif /* ! NO_SHARED_MEMORY */ |
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310 { |
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311 pXPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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312 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 313 } |
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314 pXSync(SDL_Display, False); |
| 0 | 315 } |