Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11image.c @ 1555:780fd5b61df1
Fixed bug #89
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 19 Mar 2006 12:05:16 +0000 |
| parents | d910939febfa |
| children | 3ba88cb7eb1b |
| 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 |
|
c9b51268668f
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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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Sam Lantinga <slouken@libsdl.org>
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46 { |
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Sam Lantinga <slouken@libsdl.org>
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47 if(!use_mitshm) |
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48 return; |
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Sam Lantinga <slouken@libsdl.org>
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49 shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, |
|
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Sam Lantinga <slouken@libsdl.org>
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50 IPC_CREAT | 0777); |
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Sam Lantinga <slouken@libsdl.org>
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51 if ( shminfo.shmid >= 0 ) { |
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52 shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); |
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Sam Lantinga <slouken@libsdl.org>
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53 shminfo.readOnly = False; |
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54 if ( shminfo.shmaddr != (char *)-1 ) { |
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Sam Lantinga <slouken@libsdl.org>
parents:
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55 shm_error = False; |
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1168
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Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
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56 X_handler = pXSetErrorHandler(shm_errhandler); |
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045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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parents:
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57 pXShmAttach(SDL_Display, &shminfo); |
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045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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parents:
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58 pXSync(SDL_Display, True); |
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045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
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59 pXSetErrorHandler(X_handler); |
|
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60 if ( shm_error ) |
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61 shmdt(shminfo.shmaddr); |
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62 } else { |
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Sam Lantinga <slouken@libsdl.org>
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63 shm_error = True; |
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64 } |
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Sam Lantinga <slouken@libsdl.org>
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65 shmctl(shminfo.shmid, IPC_RMID, NULL); |
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Sam Lantinga <slouken@libsdl.org>
parents:
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66 } else { |
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Sam Lantinga <slouken@libsdl.org>
parents:
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67 shm_error = True; |
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Sam Lantinga <slouken@libsdl.org>
parents:
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68 } |
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37fa1484f71b
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Sam Lantinga <slouken@libsdl.org>
parents:
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69 if ( shm_error ) |
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37fa1484f71b
From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents:
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70 use_mitshm = 0; |
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Sam Lantinga <slouken@libsdl.org>
parents:
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71 if ( use_mitshm ) |
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37fa1484f71b
From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents:
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72 screen->pixels = shminfo.shmaddr; |
|
37fa1484f71b
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Sam Lantinga <slouken@libsdl.org>
parents:
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73 } |
| 0 | 74 #endif /* ! NO_SHARED_MEMORY */ |
| 75 | |
| 76 /* Various screen update functions available */ | |
| 77 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 78 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 79 | |
| 80 int X11_SetupImage(_THIS, SDL_Surface *screen) | |
| 81 { | |
|
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82 #ifndef NO_SHARED_MEMORY |
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37fa1484f71b
From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
Sam Lantinga <slouken@libsdl.org>
parents:
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83 try_mitshm(this, screen); |
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Sam Lantinga <slouken@libsdl.org>
parents:
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84 if(use_mitshm) { |
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1168
045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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parents:
810
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85 SDL_Ximage = pXShmCreateImage(SDL_Display, SDL_Visual, |
|
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86 this->hidden->depth, ZPixmap, |
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87 shminfo.shmaddr, &shminfo, |
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88 screen->w, screen->h); |
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89 if(!SDL_Ximage) { |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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90 pXShmDetach(SDL_Display, &shminfo); |
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045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
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91 pXSync(SDL_Display, False); |
|
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92 shmdt(shminfo.shmaddr); |
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93 screen->pixels = NULL; |
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94 goto error; |
| 0 | 95 } |
|
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96 this->UpdateRects = X11_MITSHMUpdate; |
| 0 | 97 } |
|
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98 if(!use_mitshm) |
|
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99 #endif /* not NO_SHARED_MEMORY */ |
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100 { |
|
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101 int bpp; |
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102 screen->pixels = SDL_malloc(screen->h*screen->pitch); |
|
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103 if ( screen->pixels == NULL ) { |
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104 SDL_OutOfMemory(); |
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105 return -1; |
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106 } |
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107 bpp = screen->format->BytesPerPixel; |
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Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
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108 SDL_Ximage = pXCreateImage(SDL_Display, SDL_Visual, |
| 0 | 109 this->hidden->depth, ZPixmap, 0, |
| 110 (char *)screen->pixels, | |
| 111 screen->w, screen->h, | |
|
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112 32, 0); |
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113 if ( SDL_Ximage == NULL ) |
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114 goto error; |
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115 /* XPutImage will convert byte sex automatically */ |
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116 SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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117 ? MSBFirst : LSBFirst; |
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118 this->UpdateRects = X11_NormalUpdate; |
| 0 | 119 } |
| 120 screen->pitch = SDL_Ximage->bytes_per_line; | |
|
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121 return(0); |
| 0 | 122 |
|
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123 error: |
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124 SDL_SetError("Couldn't create XImage"); |
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125 return 1; |
| 0 | 126 } |
| 127 | |
| 128 void X11_DestroyImage(_THIS, SDL_Surface *screen) | |
| 129 { | |
| 130 if ( SDL_Ximage ) { | |
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1168
045f186426e1
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Ryan C. Gordon <icculus@icculus.org>
parents:
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131 pXDestroyImage(SDL_Ximage); |
| 0 | 132 #ifndef NO_SHARED_MEMORY |
| 133 if ( use_mitshm ) { | |
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1168
045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
810
diff
changeset
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134 pXShmDetach(SDL_Display, &shminfo); |
|
045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
810
diff
changeset
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135 pXSync(SDL_Display, False); |
| 0 | 136 shmdt(shminfo.shmaddr); |
| 137 } | |
| 138 #endif /* ! NO_SHARED_MEMORY */ | |
| 139 SDL_Ximage = NULL; | |
| 140 } | |
| 141 if ( screen ) { | |
| 142 screen->pixels = NULL; | |
| 143 } | |
| 144 } | |
| 145 | |
|
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146 /* Determine the number of CPUs in the system */ |
| 0 | 147 static int num_CPU(void) |
| 148 { | |
| 149 static int num_cpus = 0; | |
| 150 | |
| 151 if(!num_cpus) { | |
|
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152 #if defined(__LINUX__) |
| 0 | 153 char line[BUFSIZ]; |
| 154 FILE *pstat = fopen("/proc/stat", "r"); | |
| 155 if ( pstat ) { | |
| 156 while ( fgets(line, sizeof(line), pstat) ) { | |
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157 if (SDL_memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { |
| 0 | 158 ++num_cpus; |
| 159 } | |
| 160 } | |
| 161 fclose(pstat); | |
| 162 } | |
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163 #elif defined(__IRIX__) |
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164 num_cpus = sysconf(_SC_NPROC_ONLN); |
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165 #elif defined(_SC_NPROCESSORS_ONLN) |
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166 /* number of processors online (SVR4.0MP compliant machines) */ |
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167 num_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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168 #elif defined(_SC_NPROCESSORS_CONF) |
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169 /* number of processors configured (SVR4.0MP compliant machines) */ |
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170 num_cpus = sysconf(_SC_NPROCESSORS_CONF); |
| 0 | 171 #endif |
| 172 if ( num_cpus <= 0 ) { | |
| 173 num_cpus = 1; | |
| 174 } | |
| 175 } | |
| 176 return num_cpus; | |
| 177 } | |
| 178 | |
| 179 int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) | |
| 180 { | |
| 181 int retval; | |
| 182 | |
| 183 X11_DestroyImage(this, screen); | |
| 184 if ( flags & SDL_OPENGL ) { /* No image when using GL */ | |
| 185 retval = 0; | |
| 186 } else { | |
| 187 retval = X11_SetupImage(this, screen); | |
| 188 /* We support asynchronous blitting on the display */ | |
| 189 if ( flags & SDL_ASYNCBLIT ) { | |
| 190 /* This is actually slower on single-CPU systems, | |
| 191 probably because of CPU contention between the | |
| 192 X server and the application. | |
| 193 Note: Is this still true with XFree86 4.0? | |
| 194 */ | |
| 195 if ( num_CPU() > 1 ) { | |
| 196 screen->flags |= SDL_ASYNCBLIT; | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 return(retval); | |
| 201 } | |
| 202 | |
| 203 /* We don't actually allow hardware surfaces other than the main one */ | |
| 204 int X11_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 205 { | |
| 206 return(-1); | |
| 207 } | |
| 208 void X11_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 209 { | |
| 210 return; | |
| 211 } | |
| 212 | |
| 213 int X11_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 214 { | |
| 215 if ( (surface == SDL_VideoSurface) && blit_queued ) { | |
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216 pXSync(GFX_Display, False); |
| 0 | 217 blit_queued = 0; |
| 218 } | |
| 219 return(0); | |
| 220 } | |
| 221 void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 222 { | |
| 223 return; | |
| 224 } | |
| 225 | |
| 226 int X11_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 227 { | |
| 228 return(0); | |
| 229 } | |
| 230 | |
| 231 static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 232 { | |
| 233 int i; | |
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234 |
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235 for (i = 0; i < numrects; ++i) { |
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236 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
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237 continue; |
| 0 | 238 } |
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239 pXPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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240 rects[i].x, rects[i].y, |
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241 rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
| 0 | 242 } |
| 243 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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244 pXFlush(GFX_Display); |
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245 blit_queued = 1; |
| 0 | 246 } else { |
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247 pXSync(GFX_Display, False); |
| 0 | 248 } |
| 249 } | |
| 250 | |
| 251 static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 252 { | |
| 253 #ifndef NO_SHARED_MEMORY | |
| 254 int i; | |
| 255 | |
| 256 for ( i=0; i<numrects; ++i ) { | |
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257 if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ |
| 0 | 258 continue; |
| 259 } | |
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260 pXShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 261 rects[i].x, rects[i].y, |
| 262 rects[i].x, rects[i].y, rects[i].w, rects[i].h, | |
| 263 False); | |
| 264 } | |
| 265 if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { | |
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266 pXFlush(GFX_Display); |
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267 blit_queued = 1; |
| 0 | 268 } else { |
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269 pXSync(GFX_Display, False); |
| 0 | 270 } |
| 271 #endif /* ! NO_SHARED_MEMORY */ | |
| 272 } | |
| 273 | |
| 274 /* There's a problem with the automatic refreshing of the display. | |
| 275 Even though the XVideo code uses the GFX_Display to update the | |
| 276 video memory, it appears that updating the window asynchronously | |
| 277 from a different thread will cause "blackouts" of the window. | |
| 278 This is a sort of a hacked workaround for the problem. | |
| 279 */ | |
| 280 static int enable_autorefresh = 1; | |
| 281 | |
| 282 void X11_DisableAutoRefresh(_THIS) | |
| 283 { | |
| 284 --enable_autorefresh; | |
| 285 } | |
| 286 | |
| 287 void X11_EnableAutoRefresh(_THIS) | |
| 288 { | |
| 289 ++enable_autorefresh; | |
| 290 } | |
| 291 | |
| 292 void X11_RefreshDisplay(_THIS) | |
| 293 { | |
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294 /* Don't refresh a display that doesn't have an image (like GL) |
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295 Instead, post an expose event so the application can refresh. |
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296 */ |
| 0 | 297 if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { |
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298 SDL_PrivateExpose(); |
| 0 | 299 return; |
| 300 } | |
| 301 #ifndef NO_SHARED_MEMORY | |
| 302 if ( this->UpdateRects == X11_MITSHMUpdate ) { | |
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303 pXShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
| 0 | 304 0, 0, 0, 0, this->screen->w, this->screen->h, |
| 305 False); | |
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306 } else |
| 0 | 307 #endif /* ! NO_SHARED_MEMORY */ |
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308 { |
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309 pXPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, |
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310 0, 0, 0, 0, this->screen->w, this->screen->h); |
| 0 | 311 } |
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312 pXSync(SDL_Display, False); |
| 0 | 313 } |