Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 4085:51486c979189 SDL-1.2
> Hi Ryan,
> I checked the list you linked to, but did not see any reference to whether
> the Win32 window centering bug was fixed... Has that been addressed at all?
> I refer to the bug where, unless one has globally set the
> SDL_WINDOW_CENTERED variable in the OS, only the 1st window that is created
> will be centered. Subsequent calls to SetVideoMode will create a window tha
t
> shares the same upper-left corner location.
I'm working on that now, thanks for reporting it. What I'm doing is if the
width and height are the same, I'm leaving the window position alone, but if
they're different they will respect the positioning environment variables.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 20 Jul 2007 03:25:40 +0000 |
| parents | 3ba88cb7eb1b |
| children | e49147870aac c121d94672cb a1b03ba2fcd0 |
| 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 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
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24 #include <stdio.h> |
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25 #include <unistd.h> |
| 0 | 26 |
| 27 #include "SDL_endian.h" | |
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28 #include "../../events/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 /* Dynamic X11 may not have SHM entry points on this box. */ |
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48 if ((use_mitshm) && (!SDL_X11_HAVE_SHM)) |
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49 use_mitshm = 0; |
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50 |
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51 if(!use_mitshm) |
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52 return; |
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53 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
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54 IPC_CREAT | 0777); |
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55 if ( shminfo.shmid >= 0 ) { |
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56 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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57 shminfo.readOnly = False; |
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58 if ( shminfo.shmaddr != (char *)-1 ) { |
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59 shm_error = False; |
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60 X_handler = XSetErrorHandler(shm_errhandler); |
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61 XShmAttach(SDL_Display, &shminfo); |
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62 XSync(SDL_Display, True); |
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63 XSetErrorHandler(X_handler); |
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64 if ( shm_error ) |
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65 shmdt(shminfo.shmaddr); |
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66 } else { |
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67 shm_error = True; |
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68 } |
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69 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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70 } else { |
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71 shm_error = True; |
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72 } |
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73 if ( shm_error ) |
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74 use_mitshm = 0; |
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75 if ( use_mitshm ) |
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76 screen->pixels = shminfo.shmaddr; |
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77 } |
| 0 | 78 #endif /* ! NO_SHARED_MEMORY */ |
| 79 | |
| 80 /* Various screen update functions available */ | |
| 81 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 82 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 83 | |
| 84 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 85 { | |
|
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86 #ifndef NO_SHARED_MEMORY |
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87 try_mitshm(this, screen); |
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88 if(use_mitshm) { |
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89 SDL_Ximage = XShmCreateImage(SDL_Display, SDL_Visual, |
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90 this->hidden->depth, ZPixmap, |
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91 shminfo.shmaddr, &shminfo, |
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92 screen->w, screen->h); |
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93 if(!SDL_Ximage) { |
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94 XShmDetach(SDL_Display, &shminfo); |
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95 XSync(SDL_Display, False); |
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96 shmdt(shminfo.shmaddr); |
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97 screen->pixels = NULL; |
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98 goto error; |
| 0 | 99 } |
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100 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 101 } |
|
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102 if(!use_mitshm) |
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103 #endif /* not NO_SHARED_MEMORY */ |
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104 { |
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105 int bpp; |
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106 screen->pixels = SDL_malloc(screen->h*screen->pitch); |
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107 if ( screen->pixels == NULL ) { |
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108 SDL_OutOfMemory(); |
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109 return -1; |
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110 } |
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111 bpp = screen->format->BytesPerPixel; |
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112 SDL_Ximage = XCreateImage(SDL_Display, SDL_Visual, |
| 0 | 113 this->hidden->depth, ZPixmap, 0, |
| 114 (char *)screen->pixels, | |
| 115 screen->w, screen->h, | |
|
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116 32, 0); |
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117 if ( SDL_Ximage == NULL ) |
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118 goto error; |
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119 /* XPutImage will convert byte sex automatically */ |
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120 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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121 ? MSBFirst : LSBFirst; |
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122 this->UpdateRects = X11_NormalUpdate; |
| 0 | 123 } |
| 124 screen->pitch = SDL_Ximage->bytes_per_line; | |
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125 return(0); |
| 0 | 126 |
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127 error: |
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128 SDL_SetError("Couldn't create XImage"); |
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129 return 1; |
| 0 | 130 } |
| 131 | |
| 132 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 133 { | |
| 134 if ( SDL_Ximage ) { | |
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135 XDestroyImage(SDL_Ximage); |
| 0 | 136 #ifndef NO_SHARED_MEMORY |
| 137 if ( use_mitshm ) { | |
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138 XShmDetach(SDL_Display, &shminfo); |
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139 XSync(SDL_Display, False); |
| 0 | 140 shmdt(shminfo.shmaddr); |
| 141 } | |
| 142 #endif /* ! NO_SHARED_MEMORY */ | |
| 143 SDL_Ximage = NULL; | |
| 144 } | |
| 145 if ( screen ) { | |
| 146 screen->pixels = NULL; | |
| 147 } | |
| 148 } | |
| 149 | |
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150 /* Determine the number of CPUs in the system */ |
| 0 | 151 static int num_CPU(void) |
| 152 { | |
| 153 static int num_cpus = 0; | |
| 154 | |
| 155 if(!num_cpus) { | |
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156 #if defined(__LINUX__) |
| 0 | 157 char line[BUFSIZ]; |
| 158 FILE *pstat = fopen("/proc/stat", "r"); | |
| 159 if ( pstat ) { | |
| 160 while ( fgets(line, sizeof(line), pstat) ) { | |
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161 if (SDL_memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { |
| 0 | 162 ++num_cpus; |
| 163 } | |
| 164 } | |
| 165 fclose(pstat); | |
| 166 } | |
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167 #elif defined(__IRIX__) |
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168 num_cpus = sysconf(_SC_NPROC_ONLN); |
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169 #elif defined(_SC_NPROCESSORS_ONLN) |
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170 /* number of processors online (SVR4.0MP compliant machines) */ |
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171 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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172 #elif defined(_SC_NPROCESSORS_CONF) |
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173 /* number of processors configured (SVR4.0MP compliant machines) */ |
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174 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 175 #endif |
| 176 if ( num_cpus <= 0 ) { | |
| 177 num_cpus = 1; | |
| 178 } | |
| 179 } | |
| 180 return num_cpus; | |
| 181 } | |
| 182 | |
| 183 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 184 { | |
| 185 int retval; | |
| 186 | |
| 187 X11_DestroyImage(this, screen); | |
| 188 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 189 retval = 0; | |
| 190 } else { | |
| 191 retval = X11_SetupImage(this, screen); | |
| 192 /* We support asynchronous blitting on the display */ | |
| 193 if ( flags & SDL_ASYNCBLIT ) { | |
| 194 /* This is actually slower on single-CPU systems, | |
| 195 probably because of CPU contention between the | |
| 196 X server and the application. | |
| 197 Note: Is this still true with XFree86 4.0? | |
| 198 */ | |
| 199 if ( num_CPU() > 1 ) { | |
| 200 screen->flags |= SDL_ASYNCBLIT; | |
| 201 } | |
| 202 } | |
| 203 } | |
| 204 return(retval); | |
| 205 } | |
| 206 | |
| 207 /* We don't actually allow hardware surfaces other than the main one */ | |
| 208 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 209 { | |
| 210 return(-1); | |
| 211 } | |
| 212 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 213 { | |
| 214 return; | |
| 215 } | |
| 216 | |
| 217 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 218 { | |
| 219 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
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220 XSync(GFX_Display, False); |
| 0 | 221 blit_queued = 0; |
| 222 } | |
| 223 return(0); | |
| 224 } | |
| 225 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 226 { | |
| 227 return; | |
| 228 } | |
| 229 | |
| 230 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 231 { | |
| 232 return(0); | |
| 233 } | |
| 234 | |
| 235 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 236 { | |
| 237 int i; | |
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238 |
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239 for (i = 0; i < numrects; ++i) { |
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240 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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241 continue; |
| 0 | 242 } |
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243 XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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244 rects[i].x, rects[i].y, |
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245 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 246 } |
| 247 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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248 XFlush(GFX_Display); |
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249 blit_queued = 1; |
| 0 | 250 } else { |
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251 XSync(GFX_Display, False); |
| 0 | 252 } |
| 253 } | |
| 254 | |
| 255 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 256 { | |
| 257 #ifndef NO_SHARED_MEMORY | |
| 258 int i; | |
| 259 | |
| 260 for ( i=0; i<numrects; ++i ) { | |
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261 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 262 continue; |
| 263 } | |
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264 XShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 265 rects[i].x, rects[i].y, |
| 266 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 267 False); | |
| 268 } | |
| 269 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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270 XFlush(GFX_Display); |
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271 blit_queued = 1; |
| 0 | 272 } else { |
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273 XSync(GFX_Display, False); |
| 0 | 274 } |
| 275 #endif /* ! NO_SHARED_MEMORY */ | |
| 276 } | |
| 277 | |
| 278 /* There's a problem with the automatic refreshing of the display. | |
| 279 Even though the XVideo code uses the GFX_Display to update the | |
| 280 video memory, it appears that updating the window asynchronously | |
| 281 from a different thread will cause "blackouts" of the window. | |
| 282 This is a sort of a hacked workaround for the problem. | |
| 283 */ | |
| 284 static int enable_autorefresh = 1; | |
| 285 | |
| 286 void X11_DisableAutoRefresh(_THIS) | |
| 287 { | |
| 288 --enable_autorefresh; | |
| 289 } | |
| 290 | |
| 291 void X11_EnableAutoRefresh(_THIS) | |
| 292 { | |
| 293 ++enable_autorefresh; | |
| 294 } | |
| 295 | |
| 296 void X11_RefreshDisplay(_THIS) | |
| 297 { | |
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298 /* Don't refresh a display that doesn't have an image (like GL) |
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299 Instead, post an expose event so the application can refresh. |
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300 */ |
| 0 | 301 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
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302 SDL_PrivateExpose(); |
| 0 | 303 return; |
| 304 } | |
| 305 #ifndef NO_SHARED_MEMORY | |
| 306 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
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307 XShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 308 0, 0, 0, 0, this->screen->w, this->screen->h, |
| 309 False); | |
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310 } else |
| 0 | 311 #endif /* ! NO_SHARED_MEMORY */ |
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312 { |
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313 XPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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314 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 315 } |
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316 XSync(SDL_Display, False); |
| 0 | 317 } |
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318 |