Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 1070:75e8378103a9
Forgot variable declaration
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Mon, 06 Jun 2005 10:45:53 +0000 |
| parents | 86885b40a53b |
| children | 045f186426e1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 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> /* For getenv() prototype */ | |
| 29 #include <string.h> | |
| 30 | |
| 31 #include "SDL_events_c.h" | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_x11video.h" | |
| 34 #include "SDL_x11dga_c.h" | |
| 35 #include "SDL_x11gl_c.h" | |
| 36 | |
|
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37 #if defined(sgi) |
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38 /* IRIX doesn't have a GL library versioning system */ |
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39 #define DEFAULT_OPENGL "libGL.so" |
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40 #else |
| 0 | 41 #define DEFAULT_OPENGL "libGL.so.1" |
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42 #endif |
| 0 | 43 |
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44 #ifndef GLX_ARB_multisample |
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45 #define GLX_ARB_multisample |
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46 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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47 #define GLX_SAMPLES_ARB 100001 |
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48 #endif |
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49 |
| 0 | 50 /* return the preferred visual to use for openGL graphics */ |
| 51 XVisualInfo *X11_GL_GetVisual(_THIS) | |
| 52 { | |
| 53 #ifdef HAVE_OPENGL | |
| 54 /* 64 seems nice. */ | |
| 55 int attribs[64]; | |
| 56 int i; | |
| 57 | |
| 58 /* load the gl driver from a default path */ | |
| 59 if ( ! this->gl_config.driver_loaded ) { | |
| 60 /* no driver has been loaded, use default (ourselves) */ | |
| 61 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 62 return NULL; | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 /* See if we already have a window which we must use */ | |
| 67 if ( SDL_windowid ) { | |
| 68 XWindowAttributes a; | |
| 69 XVisualInfo vi_in; | |
| 70 int out_count; | |
| 71 | |
| 72 XGetWindowAttributes(SDL_Display, SDL_Window, &a); | |
| 73 vi_in.screen = SDL_Screen; | |
| 74 vi_in.visualid = XVisualIDFromVisual(a.visual); | |
| 75 glx_visualinfo = XGetVisualInfo(SDL_Display, | |
| 76 VisualScreenMask|VisualIDMask, &vi_in, &out_count); | |
| 77 return glx_visualinfo; | |
| 78 } | |
| 79 | |
| 80 /* Setup our GLX attributes according to the gl_config. */ | |
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81 i = 0; |
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82 attribs[i++] = GLX_RGBA; |
| 0 | 83 attribs[i++] = GLX_RED_SIZE; |
| 84 attribs[i++] = this->gl_config.red_size; | |
| 85 attribs[i++] = GLX_GREEN_SIZE; | |
| 86 attribs[i++] = this->gl_config.green_size; | |
| 87 attribs[i++] = GLX_BLUE_SIZE; | |
| 88 attribs[i++] = this->gl_config.blue_size; | |
| 89 | |
| 90 if( this->gl_config.alpha_size ) { | |
| 91 attribs[i++] = GLX_ALPHA_SIZE; | |
| 92 attribs[i++] = this->gl_config.alpha_size; | |
| 93 } | |
| 94 | |
| 95 if( this->gl_config.buffer_size ) { | |
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96 attribs[i++] = GLX_BUFFER_SIZE; |
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97 attribs[i++] = this->gl_config.buffer_size; |
| 0 | 98 } |
| 99 | |
| 100 if( this->gl_config.double_buffer ) { | |
| 101 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 102 } | |
| 103 | |
| 104 attribs[i++] = GLX_DEPTH_SIZE; | |
| 105 attribs[i++] = this->gl_config.depth_size; | |
| 106 | |
| 107 if( this->gl_config.stencil_size ) { | |
| 108 attribs[i++] = GLX_STENCIL_SIZE; | |
| 109 attribs[i++] = this->gl_config.stencil_size; | |
| 110 } | |
| 111 | |
| 112 if( this->gl_config.accum_red_size ) { | |
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113 attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 0 | 114 attribs[i++] = this->gl_config.accum_red_size; |
| 115 } | |
| 116 | |
| 117 if( this->gl_config.accum_green_size ) { | |
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118 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 0 | 119 attribs[i++] = this->gl_config.accum_green_size; |
| 120 } | |
| 121 | |
| 122 if( this->gl_config.accum_blue_size ) { | |
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123 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 0 | 124 attribs[i++] = this->gl_config.accum_blue_size; |
| 125 } | |
| 126 | |
| 127 if( this->gl_config.accum_alpha_size ) { | |
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128 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 0 | 129 attribs[i++] = this->gl_config.accum_alpha_size; |
| 130 } | |
| 131 | |
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132 if( this->gl_config.stereo ) { |
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133 attribs[i++] = GLX_STEREO; |
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134 attribs[i++] = this->gl_config.stereo; |
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135 } |
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136 |
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137 if( this->gl_config.multisamplebuffers ) { |
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138 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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139 attribs[i++] = this->gl_config.multisamplebuffers; |
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140 } |
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141 |
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142 if( this->gl_config.multisamplesamples ) { |
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143 attribs[i++] = GLX_SAMPLES_ARB; |
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144 attribs[i++] = this->gl_config.multisamplesamples; |
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145 } |
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146 |
| 0 | 147 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
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148 if ( !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
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149 attribs[i++] = GLX_X_VISUAL_TYPE; |
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150 attribs[i++] = GLX_DIRECT_COLOR; |
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151 } |
| 0 | 152 #endif |
| 153 attribs[i++] = None; | |
| 154 | |
| 155 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 156 SDL_Screen, attribs); | |
| 157 #ifdef GLX_DIRECT_COLOR | |
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158 if( !glx_visualinfo && !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| 0 | 159 attribs[i-3] = None; |
| 160 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 161 SDL_Screen, attribs); | |
| 162 } | |
| 163 #endif | |
| 164 if( !glx_visualinfo ) { | |
| 165 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 166 return NULL; | |
| 167 } | |
| 168 return glx_visualinfo; | |
| 169 #else | |
| 170 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 171 return NULL; | |
| 172 #endif | |
| 173 } | |
| 174 | |
| 175 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 176 { | |
| 177 int retval; | |
| 178 #ifdef HAVE_OPENGL | |
| 179 XSetWindowAttributes attributes; | |
| 180 unsigned long mask; | |
| 181 unsigned long black; | |
| 182 | |
| 183 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 184 SDL_Screen)) | |
| 185 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 186 attributes.background_pixel = black; | |
| 187 attributes.border_pixel = black; | |
| 188 attributes.colormap = SDL_XColorMap; | |
| 189 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 190 | |
| 191 SDL_Window = XCreateWindow(SDL_Display, WMwindow, | |
| 192 0, 0, w, h, 0, glx_visualinfo->depth, | |
| 193 InputOutput, glx_visualinfo->visual, | |
| 194 mask, &attributes); | |
| 195 if ( !SDL_Window ) { | |
| 196 SDL_SetError("Could not create window"); | |
| 197 return -1; | |
| 198 } | |
| 199 retval = 0; | |
| 200 #else | |
| 201 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 202 retval = -1; | |
| 203 #endif | |
| 204 return(retval); | |
| 205 } | |
| 206 | |
| 207 int X11_GL_CreateContext(_THIS) | |
| 208 { | |
| 209 int retval; | |
| 210 #ifdef HAVE_OPENGL | |
| 211 /* We do this to create a clean separation between X and GLX errors. */ | |
| 212 XSync( SDL_Display, False ); | |
| 213 glx_context = this->gl_data->glXCreateContext(GFX_Display, | |
| 214 glx_visualinfo, NULL, True); | |
| 215 XSync( GFX_Display, False ); | |
| 216 | |
| 217 if (glx_context == NULL) { | |
| 218 SDL_SetError("Could not create GL context"); | |
| 219 return -1; | |
| 220 } | |
| 221 | |
| 222 gl_active = 1; | |
| 223 #else | |
| 224 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 225 #endif | |
| 226 if ( gl_active ) { | |
| 227 retval = 0; | |
| 228 } else { | |
| 229 retval = -1; | |
| 230 } | |
| 231 return(retval); | |
| 232 } | |
| 233 | |
| 234 void X11_GL_Shutdown(_THIS) | |
| 235 { | |
| 236 #ifdef HAVE_OPENGL | |
| 237 /* Clean up OpenGL */ | |
| 238 if( glx_context ) { | |
| 239 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 240 | |
| 241 if (glx_context != NULL) | |
| 242 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 243 | |
| 244 if( this->gl_data->glXReleaseBuffersMESA ) { | |
| 245 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window); | |
| 246 } | |
| 247 glx_context = NULL; | |
| 248 } | |
| 249 gl_active = 0; | |
| 250 #endif /* HAVE_OPENGL */ | |
| 251 } | |
| 252 | |
| 253 #ifdef HAVE_OPENGL | |
| 254 | |
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255 static int ExtensionSupported(const char *extension) |
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256 { |
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257 const GLubyte *extensions = NULL; |
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258 const GLubyte *start; |
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259 GLubyte *where, *terminator; |
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260 |
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261 /* Extension names should not have spaces. */ |
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262 where = (GLubyte *) strchr(extension, ' '); |
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263 if (where || *extension == '\0') |
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264 return 0; |
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265 |
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266 extensions = current_video->glGetString(GL_EXTENSIONS); |
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267 /* It takes a bit of care to be fool-proof about parsing the |
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268 * OpenGL extensions string. Don't be fooled by sub-strings, |
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269 * etc. */ |
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270 |
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271 start = extensions; |
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272 |
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273 for (;;) |
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274 { |
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275 where = (GLubyte *) strstr((const char *) start, extension); |
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276 if (!where) break; |
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277 |
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278 terminator = where + strlen(extension); |
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279 if (where == start || *(where - 1) == ' ') |
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280 if (*terminator == ' ' || *terminator == '\0') return 1; |
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281 |
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282 start = terminator; |
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283 } |
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284 |
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285 return 0; |
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286 } |
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287 |
| 0 | 288 /* Make the current context active */ |
| 289 int X11_GL_MakeCurrent(_THIS) | |
| 290 { | |
| 291 int retval; | |
|
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292 |
| 0 | 293 retval = 0; |
| 294 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 295 SDL_Window, glx_context) ) { | |
| 296 SDL_SetError("Unable to make GL context current"); | |
| 297 retval = -1; | |
| 298 } | |
| 299 XSync( GFX_Display, False ); | |
| 300 | |
|
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301 /* |
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302 * The context is now current, check for glXReleaseBuffersMESA() |
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303 * extension. If extension is _not_ supported, destroy the pointer |
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304 * (to make sure it will not be called in X11_GL_Shutdown() ). |
|
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305 * |
|
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306 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so, |
|
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307 * but there's no need to call it (is is only needed for some old |
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308 * non-DRI drivers). |
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309 * |
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310 * When using for example glew (http://glew.sf.net), dlsym() for |
|
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311 * glXReleaseBuffersMESA() returns the pointer from the glew library |
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312 * (namespace conflict). |
|
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313 * |
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314 * The glXReleaseBuffersMESA() pointer in the glew is NULL, if the |
|
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315 * driver doesn't support this extension. So blindly calling it will |
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316 * cause segfault with DRI/Mesa drivers! |
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317 * |
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318 */ |
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319 |
|
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320 if ( ! ExtensionSupported("glXReleaseBuffersMESA") ) { |
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321 this->gl_data->glXReleaseBuffersMESA = NULL; |
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322 } |
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323 |
| 0 | 324 /* More Voodoo X server workarounds... Grr... */ |
| 325 SDL_Lock_EventThread(); | |
| 326 X11_CheckDGAMouse(this); | |
| 327 SDL_Unlock_EventThread(); | |
| 328 | |
| 329 return(retval); | |
| 330 } | |
| 331 | |
| 332 /* Get attribute data from glX. */ | |
| 333 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 334 { | |
| 335 int retval; | |
| 336 int glx_attrib = None; | |
| 337 | |
| 338 switch( attrib ) { | |
| 339 case SDL_GL_RED_SIZE: | |
| 340 glx_attrib = GLX_RED_SIZE; | |
| 341 break; | |
| 342 case SDL_GL_GREEN_SIZE: | |
| 343 glx_attrib = GLX_GREEN_SIZE; | |
| 344 break; | |
| 345 case SDL_GL_BLUE_SIZE: | |
| 346 glx_attrib = GLX_BLUE_SIZE; | |
| 347 break; | |
| 348 case SDL_GL_ALPHA_SIZE: | |
| 349 glx_attrib = GLX_ALPHA_SIZE; | |
| 350 break; | |
| 351 case SDL_GL_DOUBLEBUFFER: | |
| 352 glx_attrib = GLX_DOUBLEBUFFER; | |
| 353 break; | |
| 354 case SDL_GL_BUFFER_SIZE: | |
| 355 glx_attrib = GLX_BUFFER_SIZE; | |
| 356 break; | |
| 357 case SDL_GL_DEPTH_SIZE: | |
| 358 glx_attrib = GLX_DEPTH_SIZE; | |
| 359 break; | |
| 360 case SDL_GL_STENCIL_SIZE: | |
| 361 glx_attrib = GLX_STENCIL_SIZE; | |
| 362 break; | |
| 363 case SDL_GL_ACCUM_RED_SIZE: | |
| 364 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 365 break; | |
| 366 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 367 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 368 break; | |
| 369 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 370 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 371 break; | |
| 372 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 373 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 374 break; | |
|
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375 case SDL_GL_STEREO: |
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376 glx_attrib = GLX_STEREO; |
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377 break; |
|
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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378 case SDL_GL_MULTISAMPLEBUFFERS: |
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379 glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
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380 break; |
|
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381 case SDL_GL_MULTISAMPLESAMPLES: |
|
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382 glx_attrib = GLX_SAMPLES_ARB; |
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383 break; |
| 0 | 384 default: |
| 385 return(-1); | |
| 386 } | |
| 387 | |
| 388 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 389 | |
| 390 return retval; | |
| 391 } | |
| 392 | |
| 393 void X11_GL_SwapBuffers(_THIS) | |
| 394 { | |
| 395 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 396 } | |
| 397 | |
| 398 #endif /* HAVE_OPENGL */ | |
| 399 | |
| 400 void X11_GL_UnloadLibrary(_THIS) | |
| 401 { | |
| 402 #ifdef HAVE_OPENGL | |
| 403 if ( this->gl_config.driver_loaded ) { | |
| 404 dlclose(this->gl_config.dll_handle); | |
| 405 | |
| 406 this->gl_data->glXGetProcAddress = NULL; | |
| 407 this->gl_data->glXChooseVisual = NULL; | |
| 408 this->gl_data->glXCreateContext = NULL; | |
| 409 this->gl_data->glXDestroyContext = NULL; | |
| 410 this->gl_data->glXMakeCurrent = NULL; | |
| 411 this->gl_data->glXSwapBuffers = NULL; | |
| 412 | |
| 413 this->gl_config.dll_handle = NULL; | |
| 414 this->gl_config.driver_loaded = 0; | |
| 415 } | |
| 416 #endif | |
| 417 } | |
| 418 | |
| 419 #ifdef HAVE_OPENGL | |
| 420 | |
| 421 /* Passing a NULL path means load pointers from the application */ | |
| 422 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 423 { | |
| 424 void* handle; | |
| 425 int dlopen_flags; | |
| 426 | |
| 427 if ( gl_active ) { | |
| 428 SDL_SetError("OpenGL context already created"); | |
| 429 return -1; | |
| 430 } | |
| 431 | |
| 432 #ifdef RTLD_GLOBAL | |
| 433 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; | |
| 434 #else | |
| 435 dlopen_flags = RTLD_LAZY; | |
| 436 #endif | |
| 437 handle = dlopen(path, dlopen_flags); | |
| 438 /* Catch the case where the application isn't linked with GL */ | |
| 439 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) { | |
| 440 dlclose(handle); | |
| 441 path = getenv("SDL_VIDEO_GL_DRIVER"); | |
| 442 if ( path == NULL ) { | |
| 443 path = DEFAULT_OPENGL; | |
| 444 } | |
| 445 handle = dlopen(path, dlopen_flags); | |
| 446 } | |
| 447 if ( handle == NULL ) { | |
| 448 SDL_SetError("Could not load OpenGL library"); | |
| 449 return -1; | |
| 450 } | |
| 451 | |
| 452 /* Unload the old driver and reset the pointers */ | |
| 453 X11_GL_UnloadLibrary(this); | |
| 454 | |
| 455 /* Load new function pointers */ | |
|
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456 this->gl_data->glXGetProcAddress = |
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457 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB"); |
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458 this->gl_data->glXChooseVisual = |
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459 (XVisualInfo *(*)(Display *, int, int *)) dlsym(handle, "glXChooseVisual"); |
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460 this->gl_data->glXCreateContext = |
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461 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) dlsym(handle, "glXCreateContext"); |
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462 this->gl_data->glXDestroyContext = |
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463 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext"); |
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464 this->gl_data->glXMakeCurrent = |
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465 (int (*)(Display *, GLXDrawable, GLXContext)) dlsym(handle, "glXMakeCurrent"); |
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466 this->gl_data->glXSwapBuffers = |
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467 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers"); |
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468 this->gl_data->glXGetConfig = |
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469 (int (*)(Display *, XVisualInfo *, int, int *)) dlsym(handle, "glXGetConfig"); |
|
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470 this->gl_data->glXQueryExtensionsString = |
|
646
0f2029a70548
Fixed incorrect prototype for glXQueryExtensionsString()
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471 (const char *(*)(Display *, int)) dlsym(handle, "glXQueryExtensionsString"); |
|
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472 |
| 0 | 473 /* We don't compare below for this in case we're not using Mesa. */ |
|
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474 this->gl_data->glXReleaseBuffersMESA = |
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475 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" ); |
|
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476 |
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477 |
| 0 | 478 if ( (this->gl_data->glXChooseVisual == NULL) || |
| 479 (this->gl_data->glXCreateContext == NULL) || | |
| 480 (this->gl_data->glXDestroyContext == NULL) || | |
| 481 (this->gl_data->glXMakeCurrent == NULL) || | |
| 482 (this->gl_data->glXSwapBuffers == NULL) || | |
|
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483 (this->gl_data->glXGetConfig == NULL) || |
|
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484 (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 0 | 485 SDL_SetError("Could not retrieve OpenGL functions"); |
| 486 return -1; | |
| 487 } | |
| 488 | |
| 489 this->gl_config.dll_handle = handle; | |
| 490 this->gl_config.driver_loaded = 1; | |
| 491 if ( path ) { | |
| 492 strncpy(this->gl_config.driver_path, path, | |
| 493 sizeof(this->gl_config.driver_path)-1); | |
| 494 } else { | |
| 495 strcpy(this->gl_config.driver_path, ""); | |
| 496 } | |
| 497 return 0; | |
| 498 } | |
| 499 | |
| 500 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 501 { | |
|
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502 static char procname[1024]; |
| 0 | 503 void* handle; |
|
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504 void* retval; |
| 0 | 505 |
| 506 handle = this->gl_config.dll_handle; | |
| 507 if ( this->gl_data->glXGetProcAddress ) { | |
|
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508 return this->gl_data->glXGetProcAddress(proc); |
| 0 | 509 } |
|
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510 #if defined(__OpenBSD__) && !defined(__ELF__) |
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511 #undef dlsym(x,y); |
|
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512 #endif |
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513 retval = dlsym(handle, proc); |
|
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514 if (!retval && strlen(proc) <= 1022) { |
|
127
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515 procname[0] = '_'; |
|
110
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516 strcpy(procname + 1, proc); |
|
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517 retval = dlsym(handle, procname); |
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518 } |
|
7edee9f0f2cc
SDL GL dynamic loading fix for OpenBSD
Sam Lantinga <slouken@lokigames.com>
parents:
29
diff
changeset
|
519 return retval; |
| 0 | 520 } |
| 521 | |
| 522 #endif /* HAVE_OPENGL */ |