Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 28 Jun 2003 21:52:26 +0000 |
| parents | 6399f4e90211 |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 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 ) { | |
|
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47 shm_error = 1; |
| 0 | 48 return(0); |
| 49 } else | |
| 50 return(X_handler(d,e)); | |
| 51 } | |
|
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52 |
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53 static void try_mitshm(_THIS, SDL_Surface *screen) |
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54 { |
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55 if(!use_mitshm) |
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56 return; |
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57 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
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58 IPC_CREAT | 0777); |
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59 if ( shminfo.shmid >= 0 ) { |
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60 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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61 shminfo.readOnly = False; |
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62 if ( shminfo.shmaddr != (char *)-1 ) { |
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63 shm_error = False; |
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64 X_handler = XSetErrorHandler(shm_errhandler); |
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65 XShmAttach(SDL_Display, &shminfo); |
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66 XSync(SDL_Display, True); |
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67 XSetErrorHandler(X_handler); |
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68 if (shm_error) |
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69 shmdt(shminfo.shmaddr); |
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70 } else { |
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71 shm_error = True; |
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72 } |
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73 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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74 } else { |
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75 shm_error = True; |
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76 } |
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77 if ( shm_error ) |
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78 use_mitshm = 0; |
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79 if ( use_mitshm ) |
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80 screen->pixels = shminfo.shmaddr; |
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81 } |
| 0 | 82 #endif /* ! NO_SHARED_MEMORY */ |
| 83 | |
| 84 /* Various screen update functions available */ | |
| 85 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 86 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 87 | |
| 88 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 89 { | |
|
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90 #ifndef NO_SHARED_MEMORY |
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91 try_mitshm(this, screen); |
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92 if(use_mitshm) { |
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93 SDL_Ximage = XShmCreateImage(SDL_Display, SDL_Visual, |
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94 this->hidden->depth, ZPixmap, |
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95 shminfo.shmaddr, &shminfo, |
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96 screen->w, screen->h); |
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97 if(!SDL_Ximage) { |
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98 XShmDetach(SDL_Display, &shminfo); |
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99 XSync(SDL_Display, False); |
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100 shmdt(shminfo.shmaddr); |
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101 screen->pixels = NULL; |
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102 goto error; |
| 0 | 103 } |
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104 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 105 } |
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Doh! Compile error if there was no X11 shared image support
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106 if(!use_mitshm) |
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107 #endif /* not NO_SHARED_MEMORY */ |
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108 { |
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109 int bpp; |
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110 screen->pixels = malloc(screen->h*screen->pitch); |
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111 if ( screen->pixels == NULL ) { |
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112 SDL_OutOfMemory(); |
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113 return -1; |
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114 } |
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115 bpp = screen->format->BytesPerPixel; |
| 0 | 116 SDL_Ximage = XCreateImage(SDL_Display, SDL_Visual, |
| 117 this->hidden->depth, ZPixmap, 0, | |
| 118 (char *)screen->pixels, | |
| 119 screen->w, screen->h, | |
|
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120 32, 0); |
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121 if ( SDL_Ximage == NULL ) |
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122 goto error; |
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123 /* XPutImage will convert byte sex automatically */ |
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124 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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125 ? MSBFirst : LSBFirst; |
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126 this->UpdateRects = X11_NormalUpdate; |
| 0 | 127 } |
| 128 screen->pitch = SDL_Ximage->bytes_per_line; | |
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129 return(0); |
| 0 | 130 |
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131 error: |
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132 SDL_SetError("Couldn't create XImage"); |
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133 return 1; |
| 0 | 134 } |
| 135 | |
| 136 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 137 { | |
| 138 if ( SDL_Ximage ) { | |
| 139 XDestroyImage(SDL_Ximage); | |
| 140 #ifndef NO_SHARED_MEMORY | |
| 141 if ( use_mitshm ) { | |
| 142 XShmDetach(SDL_Display, &shminfo); | |
| 143 XSync(SDL_Display, False); | |
| 144 shmdt(shminfo.shmaddr); | |
| 145 } | |
| 146 #endif /* ! NO_SHARED_MEMORY */ | |
| 147 SDL_Ximage = NULL; | |
| 148 } | |
| 149 if ( screen ) { | |
| 150 screen->pixels = NULL; | |
| 151 } | |
| 152 } | |
| 153 | |
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154 /* Determine the number of CPUs in the system */ |
| 0 | 155 static int num_CPU(void) |
| 156 { | |
| 157 static int num_cpus = 0; | |
| 158 | |
| 159 if(!num_cpus) { | |
|
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160 #if defined(__linux) |
| 0 | 161 char line[BUFSIZ]; |
| 162 FILE *pstat = fopen("/proc/stat", "r"); | |
| 163 if ( pstat ) { | |
| 164 while ( fgets(line, sizeof(line), pstat) ) { | |
| 165 if (memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { | |
| 166 ++num_cpus; | |
| 167 } | |
| 168 } | |
| 169 fclose(pstat); | |
| 170 } | |
|
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171 #elif defined(__sgi) |
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172 num_cpus = sysconf(_SC_NPROC_ONLN); |
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173 #elif defined(_SC_NPROCESSORS_ONLN) |
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174 /* number of processors online (SVR4.0MP compliant machines) */ |
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175 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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176 #elif defined(_SC_NPROCESSORS_CONF) |
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177 /* number of processors configured (SVR4.0MP compliant machines) */ |
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178 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 179 #endif |
| 180 if ( num_cpus <= 0 ) { | |
| 181 num_cpus = 1; | |
| 182 } | |
| 183 } | |
| 184 return num_cpus; | |
| 185 } | |
| 186 | |
| 187 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 188 { | |
| 189 int retval; | |
| 190 | |
| 191 X11_DestroyImage(this, screen); | |
| 192 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 193 retval = 0; | |
| 194 } else { | |
| 195 retval = X11_SetupImage(this, screen); | |
| 196 /* We support asynchronous blitting on the display */ | |
| 197 if ( flags & SDL_ASYNCBLIT ) { | |
| 198 /* This is actually slower on single-CPU systems, | |
| 199 probably because of CPU contention between the | |
| 200 X server and the application. | |
| 201 Note: Is this still true with XFree86 4.0? | |
| 202 */ | |
| 203 if ( num_CPU() > 1 ) { | |
| 204 screen->flags |= SDL_ASYNCBLIT; | |
| 205 } | |
| 206 } | |
| 207 } | |
| 208 return(retval); | |
| 209 } | |
| 210 | |
| 211 /* We don't actually allow hardware surfaces other than the main one */ | |
| 212 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 213 { | |
| 214 return(-1); | |
| 215 } | |
| 216 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 217 { | |
| 218 return; | |
| 219 } | |
| 220 | |
| 221 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 222 { | |
| 223 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
| 224 XSync(GFX_Display, False); | |
| 225 blit_queued = 0; | |
| 226 } | |
| 227 return(0); | |
| 228 } | |
| 229 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 230 { | |
| 231 return; | |
| 232 } | |
| 233 | |
| 234 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 235 { | |
| 236 return(0); | |
| 237 } | |
| 238 | |
| 239 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 240 { | |
| 241 int i; | |
|
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242 |
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243 for (i = 0; i < numrects; ++i) { |
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244 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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245 continue; |
| 0 | 246 } |
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247 XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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248 rects[i].x, rects[i].y, |
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249 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 250 } |
| 251 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
| 252 XFlush(GFX_Display); | |
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253 blit_queued = 1; |
| 0 | 254 } else { |
| 255 XSync(GFX_Display, False); | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 260 { | |
| 261 #ifndef NO_SHARED_MEMORY | |
| 262 int i; | |
| 263 | |
| 264 for ( i=0; i<numrects; ++i ) { | |
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265 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 266 continue; |
| 267 } | |
| 268 XShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 269 rects[i].x, rects[i].y, | |
| 270 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 271 False); | |
| 272 } | |
| 273 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
| 274 XFlush(GFX_Display); | |
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275 blit_queued = 1; |
| 0 | 276 } else { |
| 277 XSync(GFX_Display, False); | |
| 278 } | |
| 279 #endif /* ! NO_SHARED_MEMORY */ | |
| 280 } | |
| 281 | |
| 282 /* There's a problem with the automatic refreshing of the display. | |
| 283 Even though the XVideo code uses the GFX_Display to update the | |
| 284 video memory, it appears that updating the window asynchronously | |
| 285 from a different thread will cause "blackouts" of the window. | |
| 286 This is a sort of a hacked workaround for the problem. | |
| 287 */ | |
| 288 static int enable_autorefresh = 1; | |
| 289 | |
| 290 void X11_DisableAutoRefresh(_THIS) | |
| 291 { | |
| 292 --enable_autorefresh; | |
| 293 } | |
| 294 | |
| 295 void X11_EnableAutoRefresh(_THIS) | |
| 296 { | |
| 297 ++enable_autorefresh; | |
| 298 } | |
| 299 | |
| 300 void X11_RefreshDisplay(_THIS) | |
| 301 { | |
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302 /* Don't refresh a display that doesn't have an image (like GL) |
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303 Instead, post an expose event so the application can refresh. |
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304 */ |
| 0 | 305 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
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306 SDL_PrivateExpose(); |
| 0 | 307 return; |
| 308 } | |
| 309 #ifndef NO_SHARED_MEMORY | |
| 310 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
| 311 XShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, | |
| 312 0, 0, 0, 0, this->screen->w, this->screen->h, | |
| 313 False); | |
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314 } else |
| 0 | 315 #endif /* ! NO_SHARED_MEMORY */ |
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316 { |
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317 XPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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318 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 319 } |
| 320 XSync(SDL_Display, False); | |
| 321 } |