|
0
|
1 /*
|
|
|
2 SDL - Simple DirectMedia Layer
|
|
|
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
|
|
|
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
|
|
|
20 slouken@devolution.com
|
|
|
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
|
|
|
37 #define DEFAULT_OPENGL "libGL.so.1"
|
|
|
38
|
|
|
39 /* return the preferred visual to use for openGL graphics */
|
|
|
40 XVisualInfo *X11_GL_GetVisual(_THIS)
|
|
|
41 {
|
|
|
42 #ifdef HAVE_OPENGL
|
|
|
43 /* 64 seems nice. */
|
|
|
44 int attribs[64];
|
|
|
45 int i;
|
|
|
46
|
|
|
47 /* load the gl driver from a default path */
|
|
|
48 if ( ! this->gl_config.driver_loaded ) {
|
|
|
49 /* no driver has been loaded, use default (ourselves) */
|
|
|
50 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
|
|
|
51 return NULL;
|
|
|
52 }
|
|
|
53 }
|
|
|
54
|
|
|
55 /* See if we already have a window which we must use */
|
|
|
56 if ( SDL_windowid ) {
|
|
|
57 XWindowAttributes a;
|
|
|
58 XVisualInfo vi_in;
|
|
|
59 int out_count;
|
|
|
60
|
|
|
61 XGetWindowAttributes(SDL_Display, SDL_Window, &a);
|
|
|
62 vi_in.screen = SDL_Screen;
|
|
|
63 vi_in.visualid = XVisualIDFromVisual(a.visual);
|
|
|
64 glx_visualinfo = XGetVisualInfo(SDL_Display,
|
|
|
65 VisualScreenMask|VisualIDMask, &vi_in, &out_count);
|
|
|
66 return glx_visualinfo;
|
|
|
67 }
|
|
|
68
|
|
|
69 /* Setup our GLX attributes according to the gl_config. */
|
|
|
70 i = 0;
|
|
|
71 attribs[i++] = GLX_RGBA;
|
|
|
72 attribs[i++] = GLX_RED_SIZE;
|
|
|
73 attribs[i++] = this->gl_config.red_size;
|
|
|
74 attribs[i++] = GLX_GREEN_SIZE;
|
|
|
75 attribs[i++] = this->gl_config.green_size;
|
|
|
76 attribs[i++] = GLX_BLUE_SIZE;
|
|
|
77 attribs[i++] = this->gl_config.blue_size;
|
|
|
78
|
|
|
79 if( this->gl_config.alpha_size ) {
|
|
|
80 attribs[i++] = GLX_ALPHA_SIZE;
|
|
|
81 attribs[i++] = this->gl_config.alpha_size;
|
|
|
82 }
|
|
|
83
|
|
|
84 if( this->gl_config.buffer_size ) {
|
|
|
85 attribs[i++] = GLX_BUFFER_SIZE;
|
|
|
86 attribs[i++] = this->gl_config.buffer_size;
|
|
|
87 }
|
|
|
88
|
|
|
89 if( this->gl_config.double_buffer ) {
|
|
|
90 attribs[i++] = GLX_DOUBLEBUFFER;
|
|
|
91 }
|
|
|
92
|
|
|
93 attribs[i++] = GLX_DEPTH_SIZE;
|
|
|
94 attribs[i++] = this->gl_config.depth_size;
|
|
|
95
|
|
|
96 if( this->gl_config.stencil_size ) {
|
|
|
97 attribs[i++] = GLX_STENCIL_SIZE;
|
|
|
98 attribs[i++] = this->gl_config.stencil_size;
|
|
|
99 }
|
|
|
100
|
|
|
101 if( this->gl_config.accum_red_size ) {
|
|
|
102 attribs[i++] = GLX_ACCUM_RED_SIZE;
|
|
|
103 attribs[i++] = this->gl_config.accum_red_size;
|
|
|
104 }
|
|
|
105
|
|
|
106 if( this->gl_config.accum_green_size ) {
|
|
|
107 attribs[i++] = GLX_ACCUM_GREEN_SIZE;
|
|
|
108 attribs[i++] = this->gl_config.accum_green_size;
|
|
|
109 }
|
|
|
110
|
|
|
111 if( this->gl_config.accum_blue_size ) {
|
|
|
112 attribs[i++] = GLX_ACCUM_BLUE_SIZE;
|
|
|
113 attribs[i++] = this->gl_config.accum_blue_size;
|
|
|
114 }
|
|
|
115
|
|
|
116 if( this->gl_config.accum_alpha_size ) {
|
|
|
117 attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
|
|
|
118 attribs[i++] = this->gl_config.accum_alpha_size;
|
|
|
119 }
|
|
|
120
|
|
|
121 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */
|
|
|
122 attribs[i++] = GLX_X_VISUAL_TYPE;
|
|
|
123 attribs[i++] = GLX_DIRECT_COLOR;
|
|
|
124 #endif
|
|
|
125 attribs[i++] = None;
|
|
|
126
|
|
|
127 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
|
|
|
128 SDL_Screen, attribs);
|
|
|
129 #ifdef GLX_DIRECT_COLOR
|
|
|
130 if( !glx_visualinfo ) { /* No DirectColor visual? Try again.. */
|
|
|
131 attribs[i-3] = None;
|
|
|
132 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
|
|
|
133 SDL_Screen, attribs);
|
|
|
134 }
|
|
|
135 #endif
|
|
|
136 if( !glx_visualinfo ) {
|
|
|
137 SDL_SetError( "Couldn't find matching GLX visual");
|
|
|
138 return NULL;
|
|
|
139 }
|
|
|
140 return glx_visualinfo;
|
|
|
141 #else
|
|
|
142 SDL_SetError("X11 driver not configured with OpenGL");
|
|
|
143 return NULL;
|
|
|
144 #endif
|
|
|
145 }
|
|
|
146
|
|
|
147 int X11_GL_CreateWindow(_THIS, int w, int h)
|
|
|
148 {
|
|
|
149 int retval;
|
|
|
150 #ifdef HAVE_OPENGL
|
|
|
151 XSetWindowAttributes attributes;
|
|
|
152 unsigned long mask;
|
|
|
153 unsigned long black;
|
|
|
154
|
|
|
155 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display,
|
|
|
156 SDL_Screen))
|
|
|
157 ? BlackPixel(SDL_Display, SDL_Screen) : 0;
|
|
|
158 attributes.background_pixel = black;
|
|
|
159 attributes.border_pixel = black;
|
|
|
160 attributes.colormap = SDL_XColorMap;
|
|
|
161 mask = CWBackPixel | CWBorderPixel | CWColormap;
|
|
|
162
|
|
|
163 SDL_Window = XCreateWindow(SDL_Display, WMwindow,
|
|
|
164 0, 0, w, h, 0, glx_visualinfo->depth,
|
|
|
165 InputOutput, glx_visualinfo->visual,
|
|
|
166 mask, &attributes);
|
|
|
167 if ( !SDL_Window ) {
|
|
|
168 SDL_SetError("Could not create window");
|
|
|
169 return -1;
|
|
|
170 }
|
|
|
171 retval = 0;
|
|
|
172 #else
|
|
|
173 SDL_SetError("X11 driver not configured with OpenGL");
|
|
|
174 retval = -1;
|
|
|
175 #endif
|
|
|
176 return(retval);
|
|
|
177 }
|
|
|
178
|
|
|
179 int X11_GL_CreateContext(_THIS)
|
|
|
180 {
|
|
|
181 int retval;
|
|
|
182 #ifdef HAVE_OPENGL
|
|
|
183 /* We do this to create a clean separation between X and GLX errors. */
|
|
|
184 XSync( SDL_Display, False );
|
|
|
185 glx_context = this->gl_data->glXCreateContext(GFX_Display,
|
|
|
186 glx_visualinfo, NULL, True);
|
|
|
187 XSync( GFX_Display, False );
|
|
|
188
|
|
|
189 if (glx_context == NULL) {
|
|
|
190 SDL_SetError("Could not create GL context");
|
|
|
191 return -1;
|
|
|
192 }
|
|
|
193
|
|
|
194 gl_active = 1;
|
|
|
195 #else
|
|
|
196 SDL_SetError("X11 driver not configured with OpenGL");
|
|
|
197 #endif
|
|
|
198 if ( gl_active ) {
|
|
|
199 retval = 0;
|
|
|
200 } else {
|
|
|
201 retval = -1;
|
|
|
202 }
|
|
|
203 return(retval);
|
|
|
204 }
|
|
|
205
|
|
|
206 void X11_GL_Shutdown(_THIS)
|
|
|
207 {
|
|
|
208 #ifdef HAVE_OPENGL
|
|
|
209 /* Clean up OpenGL */
|
|
|
210 if( glx_context ) {
|
|
|
211 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL);
|
|
|
212
|
|
|
213 if (glx_context != NULL)
|
|
|
214 this->gl_data->glXDestroyContext(GFX_Display, glx_context);
|
|
|
215
|
|
|
216 if( this->gl_data->glXReleaseBuffersMESA ) {
|
|
|
217 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window);
|
|
|
218 }
|
|
|
219 glx_context = NULL;
|
|
|
220 }
|
|
|
221 gl_active = 0;
|
|
|
222 #endif /* HAVE_OPENGL */
|
|
|
223 }
|
|
|
224
|
|
|
225 #ifdef HAVE_OPENGL
|
|
|
226
|
|
|
227 /* Make the current context active */
|
|
|
228 int X11_GL_MakeCurrent(_THIS)
|
|
|
229 {
|
|
|
230 int retval;
|
|
|
231
|
|
|
232 retval = 0;
|
|
|
233 if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
|
|
|
234 SDL_Window, glx_context) ) {
|
|
|
235 SDL_SetError("Unable to make GL context current");
|
|
|
236 retval = -1;
|
|
|
237 }
|
|
|
238 XSync( GFX_Display, False );
|
|
|
239
|
|
|
240 /* More Voodoo X server workarounds... Grr... */
|
|
|
241 SDL_Lock_EventThread();
|
|
|
242 X11_CheckDGAMouse(this);
|
|
|
243 SDL_Unlock_EventThread();
|
|
|
244
|
|
|
245 return(retval);
|
|
|
246 }
|
|
|
247
|
|
|
248 /* Get attribute data from glX. */
|
|
|
249 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
|
|
|
250 {
|
|
|
251 int retval;
|
|
|
252 int glx_attrib = None;
|
|
|
253
|
|
|
254 switch( attrib ) {
|
|
|
255 case SDL_GL_RED_SIZE:
|
|
|
256 glx_attrib = GLX_RED_SIZE;
|
|
|
257 break;
|
|
|
258 case SDL_GL_GREEN_SIZE:
|
|
|
259 glx_attrib = GLX_GREEN_SIZE;
|
|
|
260 break;
|
|
|
261 case SDL_GL_BLUE_SIZE:
|
|
|
262 glx_attrib = GLX_BLUE_SIZE;
|
|
|
263 break;
|
|
|
264 case SDL_GL_ALPHA_SIZE:
|
|
|
265 glx_attrib = GLX_ALPHA_SIZE;
|
|
|
266 break;
|
|
|
267 case SDL_GL_DOUBLEBUFFER:
|
|
|
268 glx_attrib = GLX_DOUBLEBUFFER;
|
|
|
269 break;
|
|
|
270 case SDL_GL_BUFFER_SIZE:
|
|
|
271 glx_attrib = GLX_BUFFER_SIZE;
|
|
|
272 break;
|
|
|
273 case SDL_GL_DEPTH_SIZE:
|
|
|
274 glx_attrib = GLX_DEPTH_SIZE;
|
|
|
275 break;
|
|
|
276 case SDL_GL_STENCIL_SIZE:
|
|
|
277 glx_attrib = GLX_STENCIL_SIZE;
|
|
|
278 break;
|
|
|
279 case SDL_GL_ACCUM_RED_SIZE:
|
|
|
280 glx_attrib = GLX_ACCUM_RED_SIZE;
|
|
|
281 break;
|
|
|
282 case SDL_GL_ACCUM_GREEN_SIZE:
|
|
|
283 glx_attrib = GLX_ACCUM_GREEN_SIZE;
|
|
|
284 break;
|
|
|
285 case SDL_GL_ACCUM_BLUE_SIZE:
|
|
|
286 glx_attrib = GLX_ACCUM_BLUE_SIZE;
|
|
|
287 break;
|
|
|
288 case SDL_GL_ACCUM_ALPHA_SIZE:
|
|
|
289 glx_attrib = GLX_ACCUM_ALPHA_SIZE;
|
|
|
290 break;
|
|
|
291 default:
|
|
|
292 return(-1);
|
|
|
293 }
|
|
|
294
|
|
|
295 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
|
|
|
296
|
|
|
297 return retval;
|
|
|
298 }
|
|
|
299
|
|
|
300 void X11_GL_SwapBuffers(_THIS)
|
|
|
301 {
|
|
|
302 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window);
|
|
|
303 }
|
|
|
304
|
|
|
305 #endif /* HAVE_OPENGL */
|
|
|
306
|
|
|
307 void X11_GL_UnloadLibrary(_THIS)
|
|
|
308 {
|
|
|
309 #ifdef HAVE_OPENGL
|
|
|
310 if ( this->gl_config.driver_loaded ) {
|
|
|
311 dlclose(this->gl_config.dll_handle);
|
|
|
312
|
|
|
313 this->gl_data->glXGetProcAddress = NULL;
|
|
|
314 this->gl_data->glXChooseVisual = NULL;
|
|
|
315 this->gl_data->glXCreateContext = NULL;
|
|
|
316 this->gl_data->glXDestroyContext = NULL;
|
|
|
317 this->gl_data->glXMakeCurrent = NULL;
|
|
|
318 this->gl_data->glXSwapBuffers = NULL;
|
|
|
319
|
|
|
320 this->gl_config.dll_handle = NULL;
|
|
|
321 this->gl_config.driver_loaded = 0;
|
|
|
322 }
|
|
|
323 #endif
|
|
|
324 }
|
|
|
325
|
|
|
326 #ifdef HAVE_OPENGL
|
|
|
327
|
|
|
328 /* Passing a NULL path means load pointers from the application */
|
|
|
329 int X11_GL_LoadLibrary(_THIS, const char* path)
|
|
|
330 {
|
|
|
331 void* handle;
|
|
|
332 int dlopen_flags;
|
|
|
333
|
|
|
334 if ( gl_active ) {
|
|
|
335 SDL_SetError("OpenGL context already created");
|
|
|
336 return -1;
|
|
|
337 }
|
|
|
338
|
|
|
339 #ifdef RTLD_GLOBAL
|
|
|
340 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
|
|
|
341 #else
|
|
|
342 dlopen_flags = RTLD_LAZY;
|
|
|
343 #endif
|
|
|
344 handle = dlopen(path, dlopen_flags);
|
|
|
345 /* Catch the case where the application isn't linked with GL */
|
|
|
346 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) {
|
|
|
347 dlclose(handle);
|
|
|
348 path = getenv("SDL_VIDEO_GL_DRIVER");
|
|
|
349 if ( path == NULL ) {
|
|
|
350 path = DEFAULT_OPENGL;
|
|
|
351 }
|
|
|
352 handle = dlopen(path, dlopen_flags);
|
|
|
353 }
|
|
|
354 if ( handle == NULL ) {
|
|
|
355 SDL_SetError("Could not load OpenGL library");
|
|
|
356 return -1;
|
|
|
357 }
|
|
|
358
|
|
|
359 /* Unload the old driver and reset the pointers */
|
|
|
360 X11_GL_UnloadLibrary(this);
|
|
|
361
|
|
|
362 /* Load new function pointers */
|
|
|
363 this->gl_data->glXGetProcAddress = dlsym(handle, "glXGetProcAddressARB");
|
|
|
364 this->gl_data->glXChooseVisual = dlsym(handle, "glXChooseVisual");
|
|
|
365 this->gl_data->glXCreateContext = dlsym(handle, "glXCreateContext");
|
|
|
366 this->gl_data->glXDestroyContext = dlsym(handle, "glXDestroyContext");
|
|
|
367 this->gl_data->glXMakeCurrent = dlsym(handle, "glXMakeCurrent");
|
|
|
368 this->gl_data->glXSwapBuffers = dlsym(handle, "glXSwapBuffers");
|
|
|
369 this->gl_data->glXGetConfig = dlsym(handle, "glXGetConfig");
|
|
|
370 /* We don't compare below for this in case we're not using Mesa. */
|
|
|
371 this->gl_data->glXReleaseBuffersMESA = dlsym( handle, "glXReleaseBuffersMESA" );
|
|
|
372
|
|
|
373 if ( (this->gl_data->glXChooseVisual == NULL) ||
|
|
|
374 (this->gl_data->glXCreateContext == NULL) ||
|
|
|
375 (this->gl_data->glXDestroyContext == NULL) ||
|
|
|
376 (this->gl_data->glXMakeCurrent == NULL) ||
|
|
|
377 (this->gl_data->glXSwapBuffers == NULL) ||
|
|
|
378 (this->gl_data->glXGetConfig == NULL) ) {
|
|
|
379 SDL_SetError("Could not retrieve OpenGL functions");
|
|
|
380 return -1;
|
|
|
381 }
|
|
|
382
|
|
|
383 this->gl_config.dll_handle = handle;
|
|
|
384 this->gl_config.driver_loaded = 1;
|
|
|
385 if ( path ) {
|
|
|
386 strncpy(this->gl_config.driver_path, path,
|
|
|
387 sizeof(this->gl_config.driver_path)-1);
|
|
|
388 } else {
|
|
|
389 strcpy(this->gl_config.driver_path, "");
|
|
|
390 }
|
|
|
391 return 0;
|
|
|
392 }
|
|
|
393
|
|
|
394 void *X11_GL_GetProcAddress(_THIS, const char* proc)
|
|
|
395 {
|
|
|
396 void* handle;
|
|
|
397
|
|
|
398 handle = this->gl_config.dll_handle;
|
|
|
399 #if 0 /* This doesn't work correctly yet */
|
|
|
400 if ( this->gl_data->glXGetProcAddress ) {
|
|
|
401 void *func, *func2;
|
|
|
402 func = this->gl_data->glXGetProcAddress(proc);
|
|
|
403 func2 = dlsym(handle, proc);
|
|
|
404 if ( func != func2 ) {
|
|
|
405 fprintf(stderr, "glXGetProcAddress returned %p and dlsym returned %p for %s\n", func, func2, proc);
|
|
|
406 }
|
|
|
407 return this->gl_data->glXGetProcAddress(proc);
|
|
|
408 }
|
|
|
409 #endif
|
|
|
410 return dlsym(handle, proc);
|
|
|
411 }
|
|
|
412
|
|
|
413 #endif /* HAVE_OPENGL */
|
