Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 1554:0ca607a5d173
Fixed bug #84
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 12:04:40 +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 |
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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 |
| 24 #include "SDL_x11video.h" | |
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25 #include "../../events/SDL_events_c.h" |
| 0 | 26 #include "SDL_x11dga_c.h" |
| 27 #include "SDL_x11gl_c.h" | |
| 28 | |
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29 #if defined(__IRIX__) |
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30 /* IRIX doesn't have a GL library versioning system */ |
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31 #define DEFAULT_OPENGL "libGL.so" |
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32 #elif defined(__MACOSX__) |
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33 #define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib" |
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34 #elif defined(__QNXNTO__) |
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35 #define DEFAULT_OPENGL "libGL.so.3" |
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36 #else |
| 0 | 37 #define DEFAULT_OPENGL "libGL.so.1" |
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38 #endif |
| 0 | 39 |
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40 #ifndef GLX_ARB_multisample |
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41 #define GLX_ARB_multisample |
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42 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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43 #define GLX_SAMPLES_ARB 100001 |
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44 #endif |
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45 |
| 0 | 46 XVisualInfo *X11_GL_GetVisual(_THIS) |
| 47 { | |
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48 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 49 /* 64 seems nice. */ |
| 50 int attribs[64]; | |
| 51 int i; | |
| 52 | |
| 53 /* load the gl driver from a default path */ | |
| 54 if ( ! this->gl_config.driver_loaded ) { | |
| 55 /* no driver has been loaded, use default (ourselves) */ | |
| 56 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 57 return NULL; | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 /* See if we already have a window which we must use */ | |
| 62 if ( SDL_windowid ) { | |
| 63 XWindowAttributes a; | |
| 64 XVisualInfo vi_in; | |
| 65 int out_count; | |
| 66 | |
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67 pXGetWindowAttributes(SDL_Display, SDL_Window, &a); |
| 0 | 68 vi_in.screen = SDL_Screen; |
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69 vi_in.visualid = pXVisualIDFromVisual(a.visual); |
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70 glx_visualinfo = pXGetVisualInfo(SDL_Display, |
| 0 | 71 VisualScreenMask|VisualIDMask, &vi_in, &out_count); |
| 72 return glx_visualinfo; | |
| 73 } | |
| 74 | |
| 75 /* Setup our GLX attributes according to the gl_config. */ | |
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76 i = 0; |
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77 attribs[i++] = GLX_RGBA; |
| 0 | 78 attribs[i++] = GLX_RED_SIZE; |
| 79 attribs[i++] = this->gl_config.red_size; | |
| 80 attribs[i++] = GLX_GREEN_SIZE; | |
| 81 attribs[i++] = this->gl_config.green_size; | |
| 82 attribs[i++] = GLX_BLUE_SIZE; | |
| 83 attribs[i++] = this->gl_config.blue_size; | |
| 84 | |
| 85 if( this->gl_config.alpha_size ) { | |
| 86 attribs[i++] = GLX_ALPHA_SIZE; | |
| 87 attribs[i++] = this->gl_config.alpha_size; | |
| 88 } | |
| 89 | |
| 90 if( this->gl_config.buffer_size ) { | |
|
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91 attribs[i++] = GLX_BUFFER_SIZE; |
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92 attribs[i++] = this->gl_config.buffer_size; |
| 0 | 93 } |
| 94 | |
| 95 if( this->gl_config.double_buffer ) { | |
| 96 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 97 } | |
| 98 | |
| 99 attribs[i++] = GLX_DEPTH_SIZE; | |
| 100 attribs[i++] = this->gl_config.depth_size; | |
| 101 | |
| 102 if( this->gl_config.stencil_size ) { | |
| 103 attribs[i++] = GLX_STENCIL_SIZE; | |
| 104 attribs[i++] = this->gl_config.stencil_size; | |
| 105 } | |
| 106 | |
| 107 if( this->gl_config.accum_red_size ) { | |
|
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108 attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 0 | 109 attribs[i++] = this->gl_config.accum_red_size; |
| 110 } | |
| 111 | |
| 112 if( this->gl_config.accum_green_size ) { | |
|
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113 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 0 | 114 attribs[i++] = this->gl_config.accum_green_size; |
| 115 } | |
| 116 | |
| 117 if( this->gl_config.accum_blue_size ) { | |
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118 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 0 | 119 attribs[i++] = this->gl_config.accum_blue_size; |
| 120 } | |
| 121 | |
| 122 if( this->gl_config.accum_alpha_size ) { | |
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123 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 0 | 124 attribs[i++] = this->gl_config.accum_alpha_size; |
| 125 } | |
| 126 | |
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127 if( this->gl_config.stereo ) { |
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128 attribs[i++] = GLX_STEREO; |
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129 attribs[i++] = this->gl_config.stereo; |
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130 } |
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131 |
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132 if( this->gl_config.multisamplebuffers ) { |
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133 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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134 attribs[i++] = this->gl_config.multisamplebuffers; |
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135 } |
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136 |
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137 if( this->gl_config.multisamplesamples ) { |
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138 attribs[i++] = GLX_SAMPLES_ARB; |
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139 attribs[i++] = this->gl_config.multisamplesamples; |
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140 } |
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141 |
| 0 | 142 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
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143 if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
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144 attribs[i++] = GLX_X_VISUAL_TYPE; |
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145 attribs[i++] = GLX_DIRECT_COLOR; |
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146 } |
| 0 | 147 #endif |
| 148 attribs[i++] = None; | |
| 149 | |
| 150 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 151 SDL_Screen, attribs); | |
| 152 #ifdef GLX_DIRECT_COLOR | |
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153 if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| 0 | 154 attribs[i-3] = None; |
| 155 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 156 SDL_Screen, attribs); | |
| 157 } | |
| 158 #endif | |
| 159 if( !glx_visualinfo ) { | |
| 160 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 161 return NULL; | |
| 162 } | |
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163 /* |
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164 printf("Found GLX visual 0x%x\n", glx_visualinfo->visualid); |
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165 */ |
| 0 | 166 return glx_visualinfo; |
| 167 #else | |
| 168 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 169 return NULL; | |
| 170 #endif | |
| 171 } | |
| 172 | |
| 173 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 174 { | |
| 175 int retval; | |
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176 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 177 XSetWindowAttributes attributes; |
| 178 unsigned long mask; | |
| 179 unsigned long black; | |
| 180 | |
| 181 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 182 SDL_Screen)) | |
| 183 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 184 attributes.background_pixel = black; | |
| 185 attributes.border_pixel = black; | |
| 186 attributes.colormap = SDL_XColorMap; | |
| 187 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 188 | |
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189 SDL_Window = pXCreateWindow(SDL_Display, WMwindow, |
| 0 | 190 0, 0, w, h, 0, glx_visualinfo->depth, |
| 191 InputOutput, glx_visualinfo->visual, | |
| 192 mask, &attributes); | |
| 193 if ( !SDL_Window ) { | |
| 194 SDL_SetError("Could not create window"); | |
| 195 return -1; | |
| 196 } | |
| 197 retval = 0; | |
| 198 #else | |
| 199 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 200 retval = -1; | |
| 201 #endif | |
| 202 return(retval); | |
| 203 } | |
| 204 | |
| 205 int X11_GL_CreateContext(_THIS) | |
| 206 { | |
| 207 int retval; | |
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208 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 209 /* We do this to create a clean separation between X and GLX errors. */ |
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210 pXSync( SDL_Display, False ); |
| 0 | 211 glx_context = this->gl_data->glXCreateContext(GFX_Display, |
| 212 glx_visualinfo, NULL, True); | |
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213 pXSync( GFX_Display, False ); |
| 0 | 214 |
| 215 if (glx_context == NULL) { | |
| 216 SDL_SetError("Could not create GL context"); | |
| 217 return -1; | |
| 218 } | |
| 219 | |
| 220 gl_active = 1; | |
| 221 #else | |
| 222 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 223 #endif | |
| 224 if ( gl_active ) { | |
| 225 retval = 0; | |
| 226 } else { | |
| 227 retval = -1; | |
| 228 } | |
| 229 return(retval); | |
| 230 } | |
| 231 | |
| 232 void X11_GL_Shutdown(_THIS) | |
| 233 { | |
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234 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 235 /* Clean up OpenGL */ |
| 236 if( glx_context ) { | |
| 237 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 238 | |
| 239 if (glx_context != NULL) | |
| 240 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 241 | |
| 242 glx_context = NULL; | |
| 243 } | |
| 244 gl_active = 0; | |
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245 #endif /* SDL_VIDEO_OPENGL_GLX */ |
| 0 | 246 } |
| 247 | |
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248 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 249 |
| 250 /* Make the current context active */ | |
| 251 int X11_GL_MakeCurrent(_THIS) | |
| 252 { | |
| 253 int retval; | |
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254 |
| 0 | 255 retval = 0; |
| 256 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 257 SDL_Window, glx_context) ) { | |
| 258 SDL_SetError("Unable to make GL context current"); | |
| 259 retval = -1; | |
| 260 } | |
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Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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261 pXSync( GFX_Display, False ); |
| 0 | 262 |
| 263 /* More Voodoo X server workarounds... Grr... */ | |
| 264 SDL_Lock_EventThread(); | |
| 265 X11_CheckDGAMouse(this); | |
| 266 SDL_Unlock_EventThread(); | |
| 267 | |
| 268 return(retval); | |
| 269 } | |
| 270 | |
| 271 /* Get attribute data from glX. */ | |
| 272 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 273 { | |
| 274 int retval; | |
| 275 int glx_attrib = None; | |
| 276 | |
| 277 switch( attrib ) { | |
| 278 case SDL_GL_RED_SIZE: | |
| 279 glx_attrib = GLX_RED_SIZE; | |
| 280 break; | |
| 281 case SDL_GL_GREEN_SIZE: | |
| 282 glx_attrib = GLX_GREEN_SIZE; | |
| 283 break; | |
| 284 case SDL_GL_BLUE_SIZE: | |
| 285 glx_attrib = GLX_BLUE_SIZE; | |
| 286 break; | |
| 287 case SDL_GL_ALPHA_SIZE: | |
| 288 glx_attrib = GLX_ALPHA_SIZE; | |
| 289 break; | |
| 290 case SDL_GL_DOUBLEBUFFER: | |
| 291 glx_attrib = GLX_DOUBLEBUFFER; | |
| 292 break; | |
| 293 case SDL_GL_BUFFER_SIZE: | |
| 294 glx_attrib = GLX_BUFFER_SIZE; | |
| 295 break; | |
| 296 case SDL_GL_DEPTH_SIZE: | |
| 297 glx_attrib = GLX_DEPTH_SIZE; | |
| 298 break; | |
| 299 case SDL_GL_STENCIL_SIZE: | |
| 300 glx_attrib = GLX_STENCIL_SIZE; | |
| 301 break; | |
| 302 case SDL_GL_ACCUM_RED_SIZE: | |
| 303 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 304 break; | |
| 305 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 306 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 307 break; | |
| 308 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 309 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 310 break; | |
| 311 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 312 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 313 break; | |
|
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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314 case SDL_GL_STEREO: |
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315 glx_attrib = GLX_STEREO; |
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316 break; |
|
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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317 case SDL_GL_MULTISAMPLEBUFFERS: |
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318 glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
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319 break; |
|
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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320 case SDL_GL_MULTISAMPLESAMPLES: |
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321 glx_attrib = GLX_SAMPLES_ARB; |
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322 break; |
| 0 | 323 default: |
| 324 return(-1); | |
| 325 } | |
| 326 | |
| 327 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 328 | |
| 329 return retval; | |
| 330 } | |
| 331 | |
| 332 void X11_GL_SwapBuffers(_THIS) | |
| 333 { | |
| 334 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 335 } | |
| 336 | |
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337 #endif /* SDL_VIDEO_OPENGL_GLX */ |
| 0 | 338 |
| 339 void X11_GL_UnloadLibrary(_THIS) | |
| 340 { | |
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341 #if SDL_VIDEO_OPENGL_GLX |
| 0 | 342 if ( this->gl_config.driver_loaded ) { |
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343 |
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344 SDL_UnloadObject(this->gl_config.dll_handle); |
| 0 | 345 |
| 346 this->gl_data->glXGetProcAddress = NULL; | |
| 347 this->gl_data->glXChooseVisual = NULL; | |
| 348 this->gl_data->glXCreateContext = NULL; | |
| 349 this->gl_data->glXDestroyContext = NULL; | |
| 350 this->gl_data->glXMakeCurrent = NULL; | |
| 351 this->gl_data->glXSwapBuffers = NULL; | |
| 352 | |
| 353 this->gl_config.dll_handle = NULL; | |
| 354 this->gl_config.driver_loaded = 0; | |
| 355 } | |
| 356 #endif | |
| 357 } | |
| 358 | |
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359 #if SDL_VIDEO_OPENGL_GLX |
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360 |
| 0 | 361 /* Passing a NULL path means load pointers from the application */ |
| 362 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 363 { | |
|
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364 void* handle = NULL; |
| 0 | 365 |
|
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366 if ( gl_active ) { |
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367 SDL_SetError("OpenGL context already created"); |
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368 return -1; |
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369 } |
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370 |
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371 if ( path == NULL ) { |
|
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Sam Lantinga <slouken@libsdl.org>
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372 path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| 0 | 373 if ( path == NULL ) { |
| 374 path = DEFAULT_OPENGL; | |
| 375 } | |
|
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376 } |
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377 |
|
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378 handle = SDL_LoadObject(path); |
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379 if ( handle == NULL ) { |
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380 /* SDL_LoadObject() will call SDL_SetError() for us. */ |
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381 return -1; |
| 0 | 382 } |
| 383 | |
| 384 /* Unload the old driver and reset the pointers */ | |
| 385 X11_GL_UnloadLibrary(this); | |
| 386 | |
| 387 /* Load new function pointers */ | |
|
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388 this->gl_data->glXGetProcAddress = |
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389 (void *(*)(const GLubyte *)) SDL_LoadFunction(handle, "glXGetProcAddressARB"); |
|
180
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390 this->gl_data->glXChooseVisual = |
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391 (XVisualInfo *(*)(Display *, int, int *)) SDL_LoadFunction(handle, "glXChooseVisual"); |
|
180
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392 this->gl_data->glXCreateContext = |
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393 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) SDL_LoadFunction(handle, "glXCreateContext"); |
|
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394 this->gl_data->glXDestroyContext = |
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395 (void (*)(Display *, GLXContext)) SDL_LoadFunction(handle, "glXDestroyContext"); |
|
180
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396 this->gl_data->glXMakeCurrent = |
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397 (int (*)(Display *, GLXDrawable, GLXContext)) SDL_LoadFunction(handle, "glXMakeCurrent"); |
|
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398 this->gl_data->glXSwapBuffers = |
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399 (void (*)(Display *, GLXDrawable)) SDL_LoadFunction(handle, "glXSwapBuffers"); |
|
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400 this->gl_data->glXGetConfig = |
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401 (int (*)(Display *, XVisualInfo *, int, int *)) SDL_LoadFunction(handle, "glXGetConfig"); |
|
638
b0108e9dea53
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402 this->gl_data->glXQueryExtensionsString = |
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403 (const char *(*)(Display *, int)) SDL_LoadFunction(handle, "glXQueryExtensionsString"); |
|
638
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|
404 |
|
1315
e94b0d7c33bc
Merged useful fixes from 1.3 branch
Sam Lantinga <slouken@libsdl.org>
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|
405 |
| 0 | 406 if ( (this->gl_data->glXChooseVisual == NULL) || |
| 407 (this->gl_data->glXCreateContext == NULL) || | |
| 408 (this->gl_data->glXDestroyContext == NULL) || | |
| 409 (this->gl_data->glXMakeCurrent == NULL) || | |
| 410 (this->gl_data->glXSwapBuffers == NULL) || | |
|
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diff
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411 (this->gl_data->glXGetConfig == NULL) || |
|
b0108e9dea53
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412 (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 0 | 413 SDL_SetError("Could not retrieve OpenGL functions"); |
| 414 return -1; | |
| 415 } | |
| 416 | |
| 417 this->gl_config.dll_handle = handle; | |
| 418 this->gl_config.driver_loaded = 1; | |
| 419 if ( path ) { | |
|
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420 SDL_strlcpy(this->gl_config.driver_path, path, |
|
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421 SDL_arraysize(this->gl_config.driver_path)); |
| 0 | 422 } else { |
|
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423 *this->gl_config.driver_path = '\0'; |
| 0 | 424 } |
| 425 return 0; | |
| 426 } | |
| 427 | |
| 428 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 429 { | |
| 430 void* handle; | |
| 431 | |
| 432 handle = this->gl_config.dll_handle; | |
| 433 if ( this->gl_data->glXGetProcAddress ) { | |
|
1196
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Fixed compile warnings with gcc 4
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changeset
|
434 return this->gl_data->glXGetProcAddress((const GLubyte *)proc); |
| 0 | 435 } |
|
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|
436 return SDL_LoadFunction(handle, proc); |
| 0 | 437 } |
| 438 | |
|
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439 #endif /* SDL_VIDEO_OPENGL_GLX */ |