annotate src/video/x11/SDL_x11image.c @ 1585:980d2a0dc2a3

Date: Tue, 4 Mar 2003 15:05:31 -0800 From: "Jim" Subject: [SDL] Frame Buffer patches... Okay I'm new at patch generation - so please tell me if there's a better way I could have done this. Attached are two patch files generated with 'cvs diff -u' SDL-fb-open-lock.patch applies to SDL_fbvideo.c Modifies the open loop to check /dev/fb/0 found on devfs... Modifies the lock code to return failure if the current virtual terminal is not the one opened for frame buffer writing... Lock would hang forever if switched away (ctrl-alt-F1) ... SDL-fb-mousedrv-screensave.patch applies to SDL_fbevents.c Switches default mouse mode based on SDL_MOUSEDRV - currently only accepts PS2 - otherwise default is MS Mouse. When the screen is switched - exisiting code (wrapped in ifdef SAVE_SCREEN_COTENTS) would save the wrong bit of the screen.... ( I run frame buffer 1600x1200, the size I requested was 800x600 - the save would save the top 800 lines (non biased) and restore them... Adding screen->offset fixed that ) However, if that option is not set, then a call to SDL_UpdateRect (full screen) is made. (which may have had it's contents changed since the screen is not entirely locked because of lock-failure patch) Jim [patches slightly tweaked for SDL 1.2.10]
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 07:48:22 +0000
parents 3ba88cb7eb1b
children e49147870aac c121d94672cb a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include <stdio.h>
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25 #include <unistd.h>
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26
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27 #include "SDL_endian.h"
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28 #include "../../events/SDL_events_c.h"
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29 #include "SDL_x11image_c.h"
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30
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31 #ifndef NO_SHARED_MEMORY
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32
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33 /* Shared memory error handler routine */
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34 static int shm_error;
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35 static int (*X_handler)(Display *, XErrorEvent *) = NULL;
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36 static int shm_errhandler(Display *d, XErrorEvent *e)
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37 {
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38 if ( e->error_code == BadAccess ) {
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39 shm_error = True;
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40 return(0);
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41 } else
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42 return(X_handler(d,e));
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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
270
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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 }
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78 #endif /* ! NO_SHARED_MEMORY */
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79
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80 /* Various screen update functions available */
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81 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects);
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82 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects);
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83
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84 int X11_SetupImage(_THIS, SDL_Surface *screen)
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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;
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99 }
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100 this->UpdateRects = X11_MITSHMUpdate;
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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);
270
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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,
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113 this->hidden->depth, ZPixmap, 0,
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114 (char *)screen->pixels,
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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;
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123 }
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124 screen->pitch = SDL_Ximage->bytes_per_line;
270
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125 return(0);
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parents:
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126
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
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parents: 252
diff changeset
127 error:
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
128 SDL_SetError("Couldn't create XImage");
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
129 return 1;
0
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130 }
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131
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132 void X11_DestroyImage(_THIS, SDL_Surface *screen)
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133 {
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134 if ( SDL_Ximage ) {
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3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
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135 XDestroyImage(SDL_Ximage);
0
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136 #ifndef NO_SHARED_MEMORY
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137 if ( use_mitshm ) {
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3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
138 XShmDetach(SDL_Display, &shminfo);
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
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139 XSync(SDL_Display, False);
0
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140 shmdt(shminfo.shmaddr);
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141 }
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142 #endif /* ! NO_SHARED_MEMORY */
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143 SDL_Ximage = NULL;
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parents:
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144 }
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145 if ( screen ) {
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146 screen->pixels = NULL;
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147 }
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148 }
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149
166
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
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150 /* Determine the number of CPUs in the system */
0
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151 static int num_CPU(void)
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152 {
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153 static int num_cpus = 0;
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154
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155 if(!num_cpus) {
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
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156 #if defined(__LINUX__)
0
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157 char line[BUFSIZ];
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158 FILE *pstat = fopen("/proc/stat", "r");
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159 if ( pstat ) {
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160 while ( fgets(line, sizeof(line), pstat) ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
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161 if (SDL_memcmp(line, "cpu", 3) == 0 && line[3] != ' ') {
0
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162 ++num_cpus;
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163 }
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164 }
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165 fclose(pstat);
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166 }
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
167 #elif defined(__IRIX__)
605
6399f4e90211 IRIX patches from Andrea Suatoni
Sam Lantinga <slouken@libsdl.org>
parents: 551
diff changeset
168 num_cpus = sysconf(_SC_NPROC_ONLN);
166
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
Sam Lantinga <slouken@libsdl.org>
parents: 161
diff changeset
169 #elif defined(_SC_NPROCESSORS_ONLN)
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diff changeset
170 /* number of processors online (SVR4.0MP compliant machines) */
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diff changeset
171 num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
Sam Lantinga <slouken@libsdl.org>
parents: 161
diff changeset
172 #elif defined(_SC_NPROCESSORS_CONF)
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parents: 161
diff changeset
173 /* number of processors configured (SVR4.0MP compliant machines) */
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
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parents: 161
diff changeset
174 num_cpus = sysconf(_SC_NPROCESSORS_CONF);
0
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175 #endif
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176 if ( num_cpus <= 0 ) {
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177 num_cpus = 1;
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178 }
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diff changeset
179 }
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180 return num_cpus;
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parents:
diff changeset
181 }
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182
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183 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags)
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184 {
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185 int retval;
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186
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187 X11_DestroyImage(this, screen);
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diff changeset
188 if ( flags & SDL_OPENGL ) { /* No image when using GL */
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189 retval = 0;
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parents:
diff changeset
190 } else {
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191 retval = X11_SetupImage(this, screen);
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parents:
diff changeset
192 /* We support asynchronous blitting on the display */
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parents:
diff changeset
193 if ( flags & SDL_ASYNCBLIT ) {
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194 /* This is actually slower on single-CPU systems,
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diff changeset
195 probably because of CPU contention between the
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diff changeset
196 X server and the application.
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diff changeset
197 Note: Is this still true with XFree86 4.0?
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diff changeset
198 */
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parents:
diff changeset
199 if ( num_CPU() > 1 ) {
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diff changeset
200 screen->flags |= SDL_ASYNCBLIT;
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parents:
diff changeset
201 }
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diff changeset
202 }
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parents:
diff changeset
203 }
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diff changeset
204 return(retval);
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parents:
diff changeset
205 }
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parents:
diff changeset
206
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parents:
diff changeset
207 /* We don't actually allow hardware surfaces other than the main one */
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diff changeset
208 int X11_AllocHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
209 {
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diff changeset
210 return(-1);
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parents:
diff changeset
211 }
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parents:
diff changeset
212 void X11_FreeHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
213 {
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parents:
diff changeset
214 return;
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parents:
diff changeset
215 }
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parents:
diff changeset
216
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parents:
diff changeset
217 int X11_LockHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
218 {
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parents:
diff changeset
219 if ( (surface == SDL_VideoSurface) && blit_queued ) {
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
220 XSync(GFX_Display, False);
0
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parents:
diff changeset
221 blit_queued = 0;
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parents:
diff changeset
222 }
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parents:
diff changeset
223 return(0);
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parents:
diff changeset
224 }
74212992fb08 Initial revision
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parents:
diff changeset
225 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
226 {
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parents:
diff changeset
227 return;
74212992fb08 Initial revision
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parents:
diff changeset
228 }
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parents:
diff changeset
229
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diff changeset
230 int X11_FlipHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
231 {
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parents:
diff changeset
232 return(0);
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parents:
diff changeset
233 }
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parents:
diff changeset
234
74212992fb08 Initial revision
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parents:
diff changeset
235 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects)
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parents:
diff changeset
236 {
74212992fb08 Initial revision
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parents:
diff changeset
237 int i;
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
238
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
239 for (i = 0; i < numrects; ++i) {
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
240 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
241 continue;
0
74212992fb08 Initial revision
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parents:
diff changeset
242 }
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
243 XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage,
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
244 rects[i].x, rects[i].y,
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
245 rects[i].x, rects[i].y, rects[i].w, rects[i].h);
0
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parents:
diff changeset
246 }
74212992fb08 Initial revision
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parents:
diff changeset
247 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) {
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
248 XFlush(GFX_Display);
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
249 blit_queued = 1;
0
74212992fb08 Initial revision
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parents:
diff changeset
250 } else {
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
251 XSync(GFX_Display, False);
0
74212992fb08 Initial revision
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parents:
diff changeset
252 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254
74212992fb08 Initial revision
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parents:
diff changeset
255 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 {
74212992fb08 Initial revision
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parents:
diff changeset
257 #ifndef NO_SHARED_MEMORY
74212992fb08 Initial revision
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parents:
diff changeset
258 int i;
74212992fb08 Initial revision
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parents:
diff changeset
259
74212992fb08 Initial revision
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parents:
diff changeset
260 for ( i=0; i<numrects; ++i ) {
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
261 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */
0
74212992fb08 Initial revision
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parents:
diff changeset
262 continue;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 }
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
264 XShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage,
0
74212992fb08 Initial revision
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parents:
diff changeset
265 rects[i].x, rects[i].y,
74212992fb08 Initial revision
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parents:
diff changeset
266 rects[i].x, rects[i].y, rects[i].w, rects[i].h,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 False);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) {
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
270 XFlush(GFX_Display);
270
37fa1484f71b From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
271 blit_queued = 1;
0
74212992fb08 Initial revision
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parents:
diff changeset
272 } else {
1575
3ba88cb7eb1b Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
parents: 1402
diff changeset
273 XSync(GFX_Display, False);
0
74212992fb08 Initial revision
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parents:
diff changeset
274 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 #endif /* ! NO_SHARED_MEMORY */
74212992fb08 Initial revision
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parents:
diff changeset
276 }
74212992fb08 Initial revision
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parents:
diff changeset
277
74212992fb08 Initial revision
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parents:
diff changeset
278 /* There's a problem with the automatic refreshing of the display.
74212992fb08 Initial revision
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parents:
diff changeset
279 Even though the XVideo code uses the GFX_Display to update the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 video memory, it appears that updating the window asynchronously
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 from a different thread will cause "blackouts" of the window.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 This is a sort of a hacked workaround for the problem.
74212992fb08 Initial revision
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parents:
diff changeset
283 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
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284 static int enable_autorefresh = 1;
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285
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286 void X11_DisableAutoRefresh(_THIS)
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287 {
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288 --enable_autorefresh;
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289 }
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290
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291 void X11_EnableAutoRefresh(_THIS)
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292 {
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293 ++enable_autorefresh;
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294 }
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295
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296 void X11_RefreshDisplay(_THIS)
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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
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301 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) {
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302 SDL_PrivateExpose();
0
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303 return;
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304 }
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305 #ifndef NO_SHARED_MEMORY
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306 if ( this->UpdateRects == X11_MITSHMUpdate ) {
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307 XShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage,
0
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308 0, 0, 0, 0, this->screen->w, this->screen->h,
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309 False);
270
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310 } else
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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);
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315 }
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316 XSync(SDL_Display, False);
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317 }
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318