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TESTING -- override pthreads to fix gstreamer v5
[wine/multimedia.git] / dlls / opengl32 / wgl.c
blobf3f78efc7697daba0c9e795bcec62d9625945c14
1 /* Window-specific OpenGL functions implementation.
2 *
3 * Copyright (c) 1999 Lionel Ulmer
4 * Copyright (c) 2005 Raphael Junqueira
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <stdarg.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include "opengl_ext.h"
29 #include "windef.h"
30 #include "winbase.h"
31 #include "winuser.h"
32 #include "winreg.h"
33 #include "wingdi.h"
34 #include "winternl.h"
35 #include "winnt.h"
36
37 #define WGL_WGLEXT_PROTOTYPES
38 #include "wine/wglext.h"
39 #include "wine/gdi_driver.h"
40 #include "wine/wgl_driver.h"
41 #include "wine/debug.h"
42
43 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
44 WINE_DECLARE_DEBUG_CHANNEL(fps);
45
46 extern struct opengl_funcs null_opengl_funcs;
47
48 /* handle management */
49
50 #define MAX_WGL_HANDLES 1024
51
52 enum wgl_handle_type
53 {
54 HANDLE_PBUFFER = 0 << 12,
55 HANDLE_CONTEXT = 1 << 12,
56 HANDLE_CONTEXT_V3 = 3 << 12,
57 HANDLE_TYPE_MASK = 15 << 12
58 };
59
60 struct opengl_context
61 {
62 DWORD tid; /* thread that the context is current in */
63 HDC draw_dc; /* current drawing DC */
64 HDC read_dc; /* current reading DC */
65 GLubyte *extensions; /* extension string */
66 GLuint *disabled_exts; /* indices of disabled extensions */
67 struct wgl_context *drv_ctx; /* driver context */
68 };
69
70 struct wgl_handle
71 {
72 UINT handle;
73 struct opengl_funcs *funcs;
74 union
75 {
76 struct opengl_context *context; /* for HANDLE_CONTEXT */
77 struct wgl_pbuffer *pbuffer; /* for HANDLE_PBUFFER */
78 struct wgl_handle *next; /* for free handles */
79 } u;
80 };
81
82 static struct wgl_handle wgl_handles[MAX_WGL_HANDLES];
83 static struct wgl_handle *next_free;
84 static unsigned int handle_count;
85
86 static CRITICAL_SECTION wgl_section;
87 static CRITICAL_SECTION_DEBUG critsect_debug =
88 {
89 0, 0, &wgl_section,
90 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
91 0, 0, { (DWORD_PTR)(__FILE__ ": wgl_section") }
92 };
93 static CRITICAL_SECTION wgl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
94
95 static const MAT2 identity = { {0,1},{0,0},{0,0},{0,1} };
96
97 static inline struct opengl_funcs *get_dc_funcs( HDC hdc )
98 {
99 struct opengl_funcs *funcs = __wine_get_wgl_driver( hdc, WINE_WGL_DRIVER_VERSION );
100 if (funcs == (void *)-1) funcs = &null_opengl_funcs;
101 return funcs;
102 }
103
104 static inline HANDLE next_handle( struct wgl_handle *ptr, enum wgl_handle_type type )
105 {
106 WORD generation = HIWORD( ptr->handle ) + 1;
107 if (!generation) generation++;
108 ptr->handle = MAKELONG( ptr - wgl_handles, generation ) | type;
109 return ULongToHandle( ptr->handle );
110 }
111
112 /* the current context is assumed valid and doesn't need locking */
113 static inline struct wgl_handle *get_current_context_ptr(void)
114 {
115 if (!NtCurrentTeb()->glCurrentRC) return NULL;
116 return &wgl_handles[LOWORD(NtCurrentTeb()->glCurrentRC) & ~HANDLE_TYPE_MASK];
117 }
118
119 static struct wgl_handle *get_handle_ptr( HANDLE handle, enum wgl_handle_type type )
120 {
121 unsigned int index = LOWORD( handle ) & ~HANDLE_TYPE_MASK;
122
123 EnterCriticalSection( &wgl_section );
124 if (index < handle_count && ULongToHandle(wgl_handles[index].handle) == handle)
125 return &wgl_handles[index];
126
127 LeaveCriticalSection( &wgl_section );
128 SetLastError( ERROR_INVALID_HANDLE );
129 return NULL;
130 }
131
132 static void release_handle_ptr( struct wgl_handle *ptr )
133 {
134 if (ptr) LeaveCriticalSection( &wgl_section );
135 }
136
137 static HANDLE alloc_handle( enum wgl_handle_type type, struct opengl_funcs *funcs, void *user_ptr )
138 {
139 HANDLE handle = 0;
140 struct wgl_handle *ptr = NULL;
141
142 EnterCriticalSection( &wgl_section );
143 if ((ptr = next_free))
144 next_free = next_free->u.next;
145 else if (handle_count < MAX_WGL_HANDLES)
146 ptr = &wgl_handles[handle_count++];
147
148 if (ptr)
149 {
150 ptr->funcs = funcs;
151 ptr->u.context = user_ptr;
152 handle = next_handle( ptr, type );
153 }
154 else SetLastError( ERROR_NOT_ENOUGH_MEMORY );
155 LeaveCriticalSection( &wgl_section );
156 return handle;
157 }
158
159 static void free_handle_ptr( struct wgl_handle *ptr )
160 {
161 ptr->handle |= 0xffff;
162 ptr->u.next = next_free;
163 ptr->funcs = NULL;
164 next_free = ptr;
165 LeaveCriticalSection( &wgl_section );
166 }
167
168 static inline enum wgl_handle_type get_current_context_type(void)
169 {
170 if (!NtCurrentTeb()->glCurrentRC) return HANDLE_CONTEXT;
171 return LOWORD(NtCurrentTeb()->glCurrentRC) & HANDLE_TYPE_MASK;
172 }
173
174 /***********************************************************************
175 * wglCopyContext (OPENGL32.@)
176 */
177 BOOL WINAPI wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
178 {
179 struct wgl_handle *src, *dst;
180 BOOL ret = FALSE;
181
182 if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
183 if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
184 {
185 if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
186 else ret = src->funcs->wgl.p_wglCopyContext( src->u.context->drv_ctx,
187 dst->u.context->drv_ctx, mask );
188 }
189 release_handle_ptr( dst );
190 release_handle_ptr( src );
191 return ret;
192 }
193
194 /***********************************************************************
195 * wglDeleteContext (OPENGL32.@)
196 */
197 BOOL WINAPI wglDeleteContext(HGLRC hglrc)
198 {
199 struct wgl_handle *ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT );
200
201 if (!ptr) return FALSE;
202
203 if (ptr->u.context->tid && ptr->u.context->tid != GetCurrentThreadId())
204 {
205 SetLastError( ERROR_BUSY );
206 release_handle_ptr( ptr );
207 return FALSE;
208 }
209 if (hglrc == NtCurrentTeb()->glCurrentRC) wglMakeCurrent( 0, 0 );
210 ptr->funcs->wgl.p_wglDeleteContext( ptr->u.context->drv_ctx );
211 HeapFree( GetProcessHeap(), 0, ptr->u.context->disabled_exts );
212 HeapFree( GetProcessHeap(), 0, ptr->u.context->extensions );
213 HeapFree( GetProcessHeap(), 0, ptr->u.context );
214 free_handle_ptr( ptr );
215 return TRUE;
216 }
217
218 /***********************************************************************
219 * wglMakeCurrent (OPENGL32.@)
220 */
221 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
222 {
223 BOOL ret = TRUE;
224 struct wgl_handle *ptr, *prev = get_current_context_ptr();
225
226 if (hglrc)
227 {
228 if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
229 if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
230 {
231 ret = ptr->funcs->wgl.p_wglMakeCurrent( hdc, ptr->u.context->drv_ctx );
232 if (ret)
233 {
234 if (prev) prev->u.context->tid = 0;
235 ptr->u.context->tid = GetCurrentThreadId();
236 ptr->u.context->draw_dc = hdc;
237 ptr->u.context->read_dc = hdc;
238 NtCurrentTeb()->glCurrentRC = hglrc;
239 NtCurrentTeb()->glTable = ptr->funcs;
240 }
241 }
242 else
243 {
244 SetLastError( ERROR_BUSY );
245 ret = FALSE;
246 }
247 release_handle_ptr( ptr );
248 }
249 else if (prev)
250 {
251 if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
252 prev->u.context->tid = 0;
253 NtCurrentTeb()->glCurrentRC = 0;
254 NtCurrentTeb()->glTable = &null_opengl_funcs;
255 }
256 else if (!hdc)
257 {
258 SetLastError( ERROR_INVALID_HANDLE );
259 ret = FALSE;
260 }
261 return ret;
262 }
263
264 /***********************************************************************
265 * wglCreateContextAttribsARB
266 *
267 * Provided by the WGL_ARB_create_context extension.
268 */
269 HGLRC WINAPI wglCreateContextAttribsARB( HDC hdc, HGLRC share, const int *attribs )
270 {
271 HGLRC ret = 0;
272 struct wgl_context *drv_ctx;
273 struct wgl_handle *share_ptr = NULL;
274 struct opengl_context *context;
275 struct opengl_funcs *funcs = get_dc_funcs( hdc );
276
277 if (!funcs || !funcs->ext.p_wglCreateContextAttribsARB) return 0;
278 if (share && !(share_ptr = get_handle_ptr( share, HANDLE_CONTEXT ))) return 0;
279 if ((drv_ctx = funcs->ext.p_wglCreateContextAttribsARB( hdc,
280 share_ptr ? share_ptr->u.context->drv_ctx : NULL, attribs )))
281 {
282 if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
283 {
284 enum wgl_handle_type type = HANDLE_CONTEXT;
285
286 if (attribs)
287 {
288 while (*attribs)
289 {
290 if (attribs[0] == WGL_CONTEXT_MAJOR_VERSION_ARB)
291 {
292 if (attribs[1] >= 3)
293 type = HANDLE_CONTEXT_V3;
294 break;
295 }
296 attribs += 2;
297 }
298 }
299
300 context->drv_ctx = drv_ctx;
301 if (!(ret = alloc_handle( type, funcs, context )))
302 HeapFree( GetProcessHeap(), 0, context );
303 }
304 if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
305 }
306 release_handle_ptr( share_ptr );
307 return ret;
308
309 }
310
311 /***********************************************************************
312 * wglMakeContextCurrentARB
313 *
314 * Provided by the WGL_ARB_make_current_read extension.
315 */
316 BOOL WINAPI wglMakeContextCurrentARB( HDC draw_hdc, HDC read_hdc, HGLRC hglrc )
317 {
318 BOOL ret = TRUE;
319 struct wgl_handle *ptr, *prev = get_current_context_ptr();
320
321 if (hglrc)
322 {
323 if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
324 if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
325 {
326 ret = (ptr->funcs->ext.p_wglMakeContextCurrentARB &&
327 ptr->funcs->ext.p_wglMakeContextCurrentARB( draw_hdc, read_hdc,
328 ptr->u.context->drv_ctx ));
329 if (ret)
330 {
331 if (prev) prev->u.context->tid = 0;
332 ptr->u.context->tid = GetCurrentThreadId();
333 ptr->u.context->draw_dc = draw_hdc;
334 ptr->u.context->read_dc = read_hdc;
335 NtCurrentTeb()->glCurrentRC = hglrc;
336 NtCurrentTeb()->glTable = ptr->funcs;
337 }
338 }
339 else
340 {
341 SetLastError( ERROR_BUSY );
342 ret = FALSE;
343 }
344 release_handle_ptr( ptr );
345 }
346 else if (prev)
347 {
348 if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
349 prev->u.context->tid = 0;
350 NtCurrentTeb()->glCurrentRC = 0;
351 NtCurrentTeb()->glTable = &null_opengl_funcs;
352 }
353 return ret;
354 }
355
356 /***********************************************************************
357 * wglGetCurrentReadDCARB
358 *
359 * Provided by the WGL_ARB_make_current_read extension.
360 */
361 HDC WINAPI wglGetCurrentReadDCARB(void)
362 {
363 struct wgl_handle *ptr = get_current_context_ptr();
364
365 if (!ptr) return 0;
366 return ptr->u.context->read_dc;
367 }
368
369 /***********************************************************************
370 * wglShareLists (OPENGL32.@)
371 */
372 BOOL WINAPI wglShareLists(HGLRC hglrcSrc, HGLRC hglrcDst)
373 {
374 BOOL ret = FALSE;
375 struct wgl_handle *src, *dst;
376
377 if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
378 if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
379 {
380 if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
381 else ret = src->funcs->wgl.p_wglShareLists( src->u.context->drv_ctx, dst->u.context->drv_ctx );
382 }
383 release_handle_ptr( dst );
384 release_handle_ptr( src );
385 return ret;
386 }
387
388 /***********************************************************************
389 * wglGetCurrentDC (OPENGL32.@)
390 */
391 HDC WINAPI wglGetCurrentDC(void)
392 {
393 struct wgl_handle *ptr = get_current_context_ptr();
394
395 if (!ptr) return 0;
396 return ptr->u.context->draw_dc;
397 }
398
399 /***********************************************************************
400 * wglCreateContext (OPENGL32.@)
401 */
402 HGLRC WINAPI wglCreateContext(HDC hdc)
403 {
404 HGLRC ret = 0;
405 struct wgl_context *drv_ctx;
406 struct opengl_context *context;
407 struct opengl_funcs *funcs = get_dc_funcs( hdc );
408
409 if (!funcs) return 0;
410 if (!(drv_ctx = funcs->wgl.p_wglCreateContext( hdc ))) return 0;
411 if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
412 {
413 context->drv_ctx = drv_ctx;
414 if (!(ret = alloc_handle( HANDLE_CONTEXT, funcs, context )))
415 HeapFree( GetProcessHeap(), 0, context );
416 }
417 if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
418 return ret;
419 }
420
421 /***********************************************************************
422 * wglGetCurrentContext (OPENGL32.@)
423 */
424 HGLRC WINAPI wglGetCurrentContext(void)
425 {
426 return NtCurrentTeb()->glCurrentRC;
427 }
428
429 /***********************************************************************
430 * wglDescribePixelFormat (OPENGL32.@)
431 */
432 INT WINAPI wglDescribePixelFormat(HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
433 {
434 struct opengl_funcs *funcs = get_dc_funcs( hdc );
435 if (!funcs) return 0;
436 return funcs->wgl.p_wglDescribePixelFormat( hdc, format, size, descr );
437 }
438
439 /***********************************************************************
440 * wglChoosePixelFormat (OPENGL32.@)
441 */
442 INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
443 {
444 PIXELFORMATDESCRIPTOR format, best;
445 int i, count, best_format;
446 int bestDBuffer = -1, bestStereo = -1;
447
448 TRACE_(wgl)( "%p %p: size %u version %u flags %u type %u color %u %u,%u,%u,%u "
449 "accum %u depth %u stencil %u aux %u\n",
450 hdc, ppfd, ppfd->nSize, ppfd->nVersion, ppfd->dwFlags, ppfd->iPixelType,
451 ppfd->cColorBits, ppfd->cRedBits, ppfd->cGreenBits, ppfd->cBlueBits, ppfd->cAlphaBits,
452 ppfd->cAccumBits, ppfd->cDepthBits, ppfd->cStencilBits, ppfd->cAuxBuffers );
453
454 count = wglDescribePixelFormat( hdc, 0, 0, NULL );
455 if (!count) return 0;
456
457 best_format = 0;
458 best.dwFlags = 0;
459 best.cAlphaBits = -1;
460 best.cColorBits = -1;
461 best.cDepthBits = -1;
462 best.cStencilBits = -1;
463 best.cAuxBuffers = -1;
464
465 for (i = 1; i <= count; i++)
466 {
467 if (!wglDescribePixelFormat( hdc, i, sizeof(format), &format )) continue;
468
469 if (ppfd->iPixelType != format.iPixelType)
470 {
471 TRACE( "pixel type mismatch for iPixelFormat=%d\n", i );
472 continue;
473 }
474
475 /* only use bitmap capable for formats for bitmap rendering */
476 if( (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) != (format.dwFlags & PFD_DRAW_TO_BITMAP))
477 {
478 TRACE( "PFD_DRAW_TO_BITMAP mismatch for iPixelFormat=%d\n", i );
479 continue;
480 }
481
482 /* The behavior of PDF_STEREO/PFD_STEREO_DONTCARE and PFD_DOUBLEBUFFER / PFD_DOUBLEBUFFER_DONTCARE
483 * is not very clear on MSDN. They specify that ChoosePixelFormat tries to match pixel formats
484 * with the flag (PFD_STEREO / PFD_DOUBLEBUFFERING) set. Otherwise it says that it tries to match
485 * formats without the given flag set.
486 * A test on Windows using a Radeon 9500pro on WinXP (the driver doesn't support Stereo)
487 * has indicated that a format without stereo is returned when stereo is unavailable.
488 * So in case PFD_STEREO is set, formats that support it should have priority above formats
489 * without. In case PFD_STEREO_DONTCARE is set, stereo is ignored.
490 *
491 * To summarize the following is most likely the correct behavior:
492 * stereo not set -> prefer non-stereo formats, but also accept stereo formats
493 * stereo set -> prefer stereo formats, but also accept non-stereo formats
494 * stereo don't care -> it doesn't matter whether we get stereo or not
495 *
496 * In Wine we will treat non-stereo the same way as don't care because it makes
497 * format selection even more complicated and second drivers with Stereo advertise
498 * each format twice anyway.
499 */
500
501 /* Doublebuffer, see the comments above */
502 if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE))
503 {
504 if (((ppfd->dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) &&
505 ((format.dwFlags & PFD_DOUBLEBUFFER) == (ppfd->dwFlags & PFD_DOUBLEBUFFER)))
506 goto found;
507
508 if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
509 }
510
511 /* Stereo, see the comments above. */
512 if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
513 {
514 if (((ppfd->dwFlags & PFD_STEREO) != bestStereo) &&
515 ((format.dwFlags & PFD_STEREO) == (ppfd->dwFlags & PFD_STEREO)))
516 goto found;
517
518 if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
519 }
520
521 /* Below we will do a number of checks to select the 'best' pixelformat.
522 * We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.
523 * The code works by trying to match the most important options as close as possible.
524 * When a reasonable format is found, we will try to match more options.
525 * It appears (see the opengl32 test) that Windows opengl drivers ignore options
526 * like cColorBits, cAlphaBits and friends if they are set to 0, so they are considered
527 * as DONTCARE. At least Serious Sam TSE relies on this behavior. */
528
529 if (ppfd->cColorBits)
530 {
531 if (((ppfd->cColorBits > best.cColorBits) && (format.cColorBits > best.cColorBits)) ||
532 ((format.cColorBits >= ppfd->cColorBits) && (format.cColorBits < best.cColorBits)))
533 goto found;
534
535 if (best.cColorBits != format.cColorBits) /* Do further checks if the format is compatible */
536 {
537 TRACE( "color mismatch for iPixelFormat=%d\n", i );
538 continue;
539 }
540 }
541 if (ppfd->cAlphaBits)
542 {
543 if (((ppfd->cAlphaBits > best.cAlphaBits) && (format.cAlphaBits > best.cAlphaBits)) ||
544 ((format.cAlphaBits >= ppfd->cAlphaBits) && (format.cAlphaBits < best.cAlphaBits)))
545 goto found;
546
547 if (best.cAlphaBits != format.cAlphaBits)
548 {
549 TRACE( "alpha mismatch for iPixelFormat=%d\n", i );
550 continue;
551 }
552 }
553 if (ppfd->cDepthBits)
554 {
555 if (((ppfd->cDepthBits > best.cDepthBits) && (format.cDepthBits > best.cDepthBits)) ||
556 ((format.cDepthBits >= ppfd->cDepthBits) && (format.cDepthBits < best.cDepthBits)))
557 goto found;
558
559 if (best.cDepthBits != format.cDepthBits)
560 {
561 TRACE( "depth mismatch for iPixelFormat=%d\n", i );
562 continue;
563 }
564 }
565 if (ppfd->cStencilBits)
566 {
567 if (((ppfd->cStencilBits > best.cStencilBits) && (format.cStencilBits > best.cStencilBits)) ||
568 ((format.cStencilBits >= ppfd->cStencilBits) && (format.cStencilBits < best.cStencilBits)))
569 goto found;
570
571 if (best.cStencilBits != format.cStencilBits)
572 {
573 TRACE( "stencil mismatch for iPixelFormat=%d\n", i );
574 continue;
575 }
576 }
577 if (ppfd->cAuxBuffers)
578 {
579 if (((ppfd->cAuxBuffers > best.cAuxBuffers) && (format.cAuxBuffers > best.cAuxBuffers)) ||
580 ((format.cAuxBuffers >= ppfd->cAuxBuffers) && (format.cAuxBuffers < best.cAuxBuffers)))
581 goto found;
582
583 if (best.cAuxBuffers != format.cAuxBuffers)
584 {
585 TRACE( "aux mismatch for iPixelFormat=%d\n", i );
586 continue;
587 }
588 }
589 continue;
590
591 found:
592 best_format = i;
593 best = format;
594 bestDBuffer = format.dwFlags & PFD_DOUBLEBUFFER;
595 bestStereo = format.dwFlags & PFD_STEREO;
596 }
597
598 TRACE( "returning %u\n", best_format );
599 return best_format;
600 }
601
602 /***********************************************************************
603 * wglGetPixelFormat (OPENGL32.@)
604 */
605 INT WINAPI wglGetPixelFormat(HDC hdc)
606 {
607 struct opengl_funcs *funcs = get_dc_funcs( hdc );
608 if (!funcs) return 0;
609 return funcs->wgl.p_wglGetPixelFormat( hdc );
610 }
611
612 /***********************************************************************
613 * wglSetPixelFormat(OPENGL32.@)
614 */
615 BOOL WINAPI wglSetPixelFormat( HDC hdc, INT format, const PIXELFORMATDESCRIPTOR *descr )
616 {
617 struct opengl_funcs *funcs = get_dc_funcs( hdc );
618 if (!funcs) return FALSE;
619 return funcs->wgl.p_wglSetPixelFormat( hdc, format, descr );
620 }
621
622 /***********************************************************************
623 * wglSwapBuffers (OPENGL32.@)
624 */
625 BOOL WINAPI DECLSPEC_HOTPATCH wglSwapBuffers( HDC hdc )
626 {
627 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
628
629 if (!funcs || !funcs->wgl.p_wglSwapBuffers) return FALSE;
630 if (!funcs->wgl.p_wglSwapBuffers( hdc )) return FALSE;
631
632 if (TRACE_ON(fps))
633 {
634 static long prev_time, start_time;
635 static unsigned long frames, frames_total;
636
637 DWORD time = GetTickCount();
638 frames++;
639 frames_total++;
640 /* every 1.5 seconds */
641 if (time - prev_time > 1500)
642 {
643 TRACE_(fps)("@ approx %.2ffps, total %.2ffps\n",
644 1000.0*frames/(time - prev_time), 1000.0*frames_total/(time - start_time));
645 prev_time = time;
646 frames = 0;
647 if (start_time == 0) start_time = time;
648 }
649 }
650 return TRUE;
651 }
652
653 /***********************************************************************
654 * wglCreateLayerContext (OPENGL32.@)
655 */
656 HGLRC WINAPI wglCreateLayerContext(HDC hdc,
657 int iLayerPlane) {
658 TRACE("(%p,%d)\n", hdc, iLayerPlane);
659
660 if (iLayerPlane == 0) {
661 return wglCreateContext(hdc);
662 }
663 FIXME("no handler for layer %d\n", iLayerPlane);
664
665 return NULL;
666 }
667
668 /***********************************************************************
669 * wglDescribeLayerPlane (OPENGL32.@)
670 */
671 BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
672 int iPixelFormat,
673 int iLayerPlane,
674 UINT nBytes,
675 LPLAYERPLANEDESCRIPTOR plpd) {
676 FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);
677
678 return FALSE;
679 }
680
681 /***********************************************************************
682 * wglGetLayerPaletteEntries (OPENGL32.@)
683 */
684 int WINAPI wglGetLayerPaletteEntries(HDC hdc,
685 int iLayerPlane,
686 int iStart,
687 int cEntries,
688 const COLORREF *pcr) {
689 FIXME("(): stub!\n");
690
691 return 0;
692 }
693
694 static BOOL filter_extensions(const char *extensions, GLubyte **exts_list, GLuint **disabled_exts);
695
696 void WINAPI glGetIntegerv(GLenum pname, GLint *data)
697 {
698 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
699
700 TRACE("(%d, %p)\n", pname, data);
701 if (pname == GL_NUM_EXTENSIONS)
702 {
703 struct wgl_handle *ptr = get_current_context_ptr();
704
705 if (ptr->u.context->disabled_exts ||
706 filter_extensions(NULL, NULL, &ptr->u.context->disabled_exts))
707 {
708 const GLuint *disabled_exts = ptr->u.context->disabled_exts;
709 GLint count, disabled_count = 0;
710
711 funcs->gl.p_glGetIntegerv(pname, &count);
712 while (*disabled_exts++ != ~0u)
713 disabled_count++;
714 *data = count - disabled_count;
715 return;
716 }
717 }
718 funcs->gl.p_glGetIntegerv(pname, data);
719 }
720
721 const GLubyte * WINAPI glGetStringi(GLenum name, GLuint index)
722 {
723 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
724
725 TRACE("(%d, %d)\n", name, index);
726 if (!funcs->ext.p_glGetStringi)
727 {
728 void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
729
730 *func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
731 }
732
733 if (name == GL_EXTENSIONS)
734 {
735 struct wgl_handle *ptr = get_current_context_ptr();
736
737 if (ptr->u.context->disabled_exts ||
738 filter_extensions(NULL, NULL, &ptr->u.context->disabled_exts))
739 {
740 const GLuint *disabled_exts = ptr->u.context->disabled_exts;
741 unsigned int disabled_count = 0;
742
743 while (index + disabled_count >= *disabled_exts++)
744 disabled_count++;
745 return funcs->ext.p_glGetStringi(name, index + disabled_count);
746 }
747 }
748 return funcs->ext.p_glGetStringi(name, index);
749 }
750
751 /* check if the extension is present in the list */
752 static BOOL has_extension( const char *list, const char *ext, size_t len )
753 {
754 if (!list)
755 {
756 const char *gl_ext;
757 unsigned int i;
758 GLint extensions_count;
759
760 glGetIntegerv(GL_NUM_EXTENSIONS, &extensions_count);
761 for (i = 0; i < extensions_count; ++i)
762 {
763 gl_ext = (const char *)glGetStringi(GL_EXTENSIONS, i);
764 if (!strncmp(gl_ext, ext, len) && !gl_ext[len])
765 return TRUE;
766 }
767 return FALSE;
768 }
769
770 while (list)
771 {
772 while (*list == ' ') list++;
773 if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
774 list = strchr( list, ' ' );
775 }
776 return FALSE;
777 }
778
779 static int compar(const void *elt_a, const void *elt_b) {
780 return strcmp(((const OpenGL_extension *) elt_a)->name,
781 ((const OpenGL_extension *) elt_b)->name);
782 }
783
784 /* Check if a GL extension is supported */
785 static BOOL is_extension_supported(const char* extension)
786 {
787 enum wgl_handle_type type = get_current_context_type();
788 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
789 const char *gl_ext_string = NULL;
790 size_t len;
791
792 TRACE("Checking for extension '%s'\n", extension);
793
794 if (type == HANDLE_CONTEXT)
795 {
796 gl_ext_string = (const char*)glGetString(GL_EXTENSIONS);
797 if (!gl_ext_string)
798 {
799 ERR("No OpenGL extensions found, check if your OpenGL setup is correct!\n");
800 return FALSE;
801 }
802 }
803
804 /* We use the GetProcAddress function from the display driver to retrieve function pointers
805 * for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
806 * using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
807 * require the function to return NULL when an extension isn't found. For this reason we check
808 * if the OpenGL extension required for the function we are looking up is supported. */
809
810 while ((len = strcspn(extension, " ")) != 0)
811 {
812 /* Check if the extension is part of the GL extension string to see if it is supported. */
813 if (has_extension(gl_ext_string, extension, len))
814 return TRUE;
815
816 /* In general an OpenGL function starts as an ARB/EXT extension and at some stage
817 * it becomes part of the core OpenGL library and can be reached without the ARB/EXT
818 * suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
819 * Check if we are searching for a core GL function */
820 if(strncmp(extension, "GL_VERSION_", 11) == 0)
821 {
822 const GLubyte *gl_version = funcs->gl.p_glGetString(GL_VERSION);
823 const char *version = extension + 11; /* Move past 'GL_VERSION_' */
824
825 if(!gl_version) {
826 ERR("No OpenGL version found!\n");
827 return FALSE;
828 }
829
830 /* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
831 * The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
832 if( (gl_version[0] > version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2])) ) {
833 return TRUE;
834 }
835 WARN("The function requires OpenGL version '%c.%c' while your drivers only provide '%c.%c'\n", version[0], version[2], gl_version[0], gl_version[2]);
836 }
837
838 if (extension[len] == ' ') len++;
839 extension += len;
840 }
841
842 return FALSE;
843 }
844
845 /***********************************************************************
846 * wglGetProcAddress (OPENGL32.@)
847 */
848 PROC WINAPI wglGetProcAddress( LPCSTR name )
849 {
850 struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
851 void **func_ptr;
852 OpenGL_extension ext;
853 const OpenGL_extension *ext_ret;
854
855 if (!name) return NULL;
856
857 /* Without an active context opengl32 doesn't know to what
858 * driver it has to dispatch wglGetProcAddress.
859 */
860 if (!get_current_context_ptr())
861 {
862 WARN("No active WGL context found\n");
863 return NULL;
864 }
865
866 ext.name = name;
867 ext_ret = bsearch(&ext, extension_registry, extension_registry_size, sizeof(ext), compar);
868 if (!ext_ret)
869 {
870 WARN("Function %s unknown\n", name);
871 return NULL;
872 }
873
874 func_ptr = (void **)&funcs->ext + (ext_ret - extension_registry);
875 if (!*func_ptr)
876 {
877 void *driver_func = funcs->wgl.p_wglGetProcAddress( name );
878
879 if (!is_extension_supported(ext_ret->extension))
880 {
881 unsigned int i;
882 static const struct { const char *name, *alt; } alternatives[] =
883 {
884 { "glCopyTexSubImage3DEXT", "glCopyTexSubImage3D" }, /* needed by RuneScape */
885 { "glVertexAttribDivisor", "glVertexAttribDivisorARB"}, /* needed by Caffeine */
886 };
887
888 for (i = 0; i < sizeof(alternatives)/sizeof(alternatives[0]); i++)
889 {
890 if (strcmp( name, alternatives[i].name )) continue;
891 WARN("Extension %s required for %s not supported, trying %s\n",
892 ext_ret->extension, name, alternatives[i].alt );
893 return wglGetProcAddress( alternatives[i].alt );
894 }
895 WARN("Extension %s required for %s not supported\n", ext_ret->extension, name);
896 return NULL;
897 }
898
899 if (driver_func == NULL)
900 {
901 WARN("Function %s not supported by driver\n", name);
902 return NULL;
903 }
904 *func_ptr = driver_func;
905 }
906
907 TRACE("returning %s -> %p\n", name, ext_ret->func);
908 return ext_ret->func;
909 }
910
911 /***********************************************************************
912 * wglRealizeLayerPalette (OPENGL32.@)
913 */
914 BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
915 int iLayerPlane,
916 BOOL bRealize) {
917 FIXME("()\n");
918
919 return FALSE;
920 }
921
922 /***********************************************************************
923 * wglSetLayerPaletteEntries (OPENGL32.@)
924 */
925 int WINAPI wglSetLayerPaletteEntries(HDC hdc,
926 int iLayerPlane,
927 int iStart,
928 int cEntries,
929 const COLORREF *pcr) {
930 FIXME("(): stub!\n");
931
932 return 0;
933 }
934
935 /***********************************************************************
936 * wglSwapLayerBuffers (OPENGL32.@)
937 */
938 BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
939 UINT fuPlanes) {
940 TRACE("(%p, %08x)\n", hdc, fuPlanes);
941
942 if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
943 if (!wglSwapBuffers( hdc )) return FALSE;
944 fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
945 }
946
947 if (fuPlanes) {
948 WARN("Following layers unhandled: %08x\n", fuPlanes);
949 }
950
951 return TRUE;
952 }
953
954 /***********************************************************************
955 * wglAllocateMemoryNV
956 *
957 * Provided by the WGL_NV_vertex_array_range extension.
958 */
959 void * WINAPI wglAllocateMemoryNV( GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority )
960 {
961 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
962
963 if (!funcs->ext.p_wglAllocateMemoryNV) return NULL;
964 return funcs->ext.p_wglAllocateMemoryNV( size, readfreq, writefreq, priority );
965 }
966
967 /***********************************************************************
968 * wglFreeMemoryNV
969 *
970 * Provided by the WGL_NV_vertex_array_range extension.
971 */
972 void WINAPI wglFreeMemoryNV( void *pointer )
973 {
974 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
975
976 if (funcs->ext.p_wglFreeMemoryNV) funcs->ext.p_wglFreeMemoryNV( pointer );
977 }
978
979 /***********************************************************************
980 * wglBindTexImageARB
981 *
982 * Provided by the WGL_ARB_render_texture extension.
983 */
984 BOOL WINAPI wglBindTexImageARB( HPBUFFERARB handle, int buffer )
985 {
986 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
987 BOOL ret;
988
989 if (!ptr) return FALSE;
990 ret = ptr->funcs->ext.p_wglBindTexImageARB( ptr->u.pbuffer, buffer );
991 release_handle_ptr( ptr );
992 return ret;
993 }
994
995 /***********************************************************************
996 * wglReleaseTexImageARB
997 *
998 * Provided by the WGL_ARB_render_texture extension.
999 */
1000 BOOL WINAPI wglReleaseTexImageARB( HPBUFFERARB handle, int buffer )
1001 {
1002 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1003 BOOL ret;
1004
1005 if (!ptr) return FALSE;
1006 ret = ptr->funcs->ext.p_wglReleaseTexImageARB( ptr->u.pbuffer, buffer );
1007 release_handle_ptr( ptr );
1008 return ret;
1009 }
1010
1011 /***********************************************************************
1012 * wglSetPbufferAttribARB
1013 *
1014 * Provided by the WGL_ARB_render_texture extension.
1015 */
1016 BOOL WINAPI wglSetPbufferAttribARB( HPBUFFERARB handle, const int *attribs )
1017 {
1018 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1019 BOOL ret;
1020
1021 if (!ptr) return FALSE;
1022 ret = ptr->funcs->ext.p_wglSetPbufferAttribARB( ptr->u.pbuffer, attribs );
1023 release_handle_ptr( ptr );
1024 return ret;
1025 }
1026
1027 /***********************************************************************
1028 * wglChoosePixelFormatARB
1029 *
1030 * Provided by the WGL_ARB_pixel_format extension.
1031 */
1032 BOOL WINAPI wglChoosePixelFormatARB( HDC hdc, const int *iattribs, const FLOAT *fattribs,
1033 UINT max, int *formats, UINT *count )
1034 {
1035 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1036
1037 if (!funcs || !funcs->ext.p_wglChoosePixelFormatARB) return FALSE;
1038 return funcs->ext.p_wglChoosePixelFormatARB( hdc, iattribs, fattribs, max, formats, count );
1039 }
1040
1041 /***********************************************************************
1042 * wglGetPixelFormatAttribivARB
1043 *
1044 * Provided by the WGL_ARB_pixel_format extension.
1045 */
1046 BOOL WINAPI wglGetPixelFormatAttribivARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
1047 int *values )
1048 {
1049 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1050
1051 if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribivARB) return FALSE;
1052 return funcs->ext.p_wglGetPixelFormatAttribivARB( hdc, format, layer, count, attribs, values );
1053 }
1054
1055 /***********************************************************************
1056 * wglGetPixelFormatAttribfvARB
1057 *
1058 * Provided by the WGL_ARB_pixel_format extension.
1059 */
1060 BOOL WINAPI wglGetPixelFormatAttribfvARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
1061 FLOAT *values )
1062 {
1063 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1064
1065 if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribfvARB) return FALSE;
1066 return funcs->ext.p_wglGetPixelFormatAttribfvARB( hdc, format, layer, count, attribs, values );
1067 }
1068
1069 /***********************************************************************
1070 * wglCreatePbufferARB
1071 *
1072 * Provided by the WGL_ARB_pbuffer extension.
1073 */
1074 HPBUFFERARB WINAPI wglCreatePbufferARB( HDC hdc, int format, int width, int height, const int *attribs )
1075 {
1076 HPBUFFERARB ret;
1077 struct wgl_pbuffer *pbuffer;
1078 struct opengl_funcs *funcs = get_dc_funcs( hdc );
1079
1080 if (!funcs || !funcs->ext.p_wglCreatePbufferARB) return 0;
1081 if (!(pbuffer = funcs->ext.p_wglCreatePbufferARB( hdc, format, width, height, attribs ))) return 0;
1082 ret = alloc_handle( HANDLE_PBUFFER, funcs, pbuffer );
1083 if (!ret) funcs->ext.p_wglDestroyPbufferARB( pbuffer );
1084 return ret;
1085 }
1086
1087 /***********************************************************************
1088 * wglGetPbufferDCARB
1089 *
1090 * Provided by the WGL_ARB_pbuffer extension.
1091 */
1092 HDC WINAPI wglGetPbufferDCARB( HPBUFFERARB handle )
1093 {
1094 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1095 HDC ret;
1096
1097 if (!ptr) return 0;
1098 ret = ptr->funcs->ext.p_wglGetPbufferDCARB( ptr->u.pbuffer );
1099 release_handle_ptr( ptr );
1100 return ret;
1101 }
1102
1103 /***********************************************************************
1104 * wglReleasePbufferDCARB
1105 *
1106 * Provided by the WGL_ARB_pbuffer extension.
1107 */
1108 int WINAPI wglReleasePbufferDCARB( HPBUFFERARB handle, HDC hdc )
1109 {
1110 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1111 BOOL ret;
1112
1113 if (!ptr) return FALSE;
1114 ret = ptr->funcs->ext.p_wglReleasePbufferDCARB( ptr->u.pbuffer, hdc );
1115 release_handle_ptr( ptr );
1116 return ret;
1117 }
1118
1119 /***********************************************************************
1120 * wglDestroyPbufferARB
1121 *
1122 * Provided by the WGL_ARB_pbuffer extension.
1123 */
1124 BOOL WINAPI wglDestroyPbufferARB( HPBUFFERARB handle )
1125 {
1126 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1127
1128 if (!ptr) return FALSE;
1129 ptr->funcs->ext.p_wglDestroyPbufferARB( ptr->u.pbuffer );
1130 free_handle_ptr( ptr );
1131 return TRUE;
1132 }
1133
1134 /***********************************************************************
1135 * wglQueryPbufferARB
1136 *
1137 * Provided by the WGL_ARB_pbuffer extension.
1138 */
1139 BOOL WINAPI wglQueryPbufferARB( HPBUFFERARB handle, int attrib, int *value )
1140 {
1141 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1142 BOOL ret;
1143
1144 if (!ptr) return FALSE;
1145 ret = ptr->funcs->ext.p_wglQueryPbufferARB( ptr->u.pbuffer, attrib, value );
1146 release_handle_ptr( ptr );
1147 return ret;
1148 }
1149
1150 /***********************************************************************
1151 * wglGetExtensionsStringARB
1152 *
1153 * Provided by the WGL_ARB_extensions_string extension.
1154 */
1155 const char * WINAPI wglGetExtensionsStringARB( HDC hdc )
1156 {
1157 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1158
1159 if (!funcs || !funcs->ext.p_wglGetExtensionsStringARB) return NULL;
1160 return (const char *)funcs->ext.p_wglGetExtensionsStringARB( hdc );
1161 }
1162
1163 /***********************************************************************
1164 * wglGetExtensionsStringEXT
1165 *
1166 * Provided by the WGL_EXT_extensions_string extension.
1167 */
1168 const char * WINAPI wglGetExtensionsStringEXT(void)
1169 {
1170 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1171
1172 if (!funcs->ext.p_wglGetExtensionsStringEXT) return NULL;
1173 return (const char *)funcs->ext.p_wglGetExtensionsStringEXT();
1174 }
1175
1176 /***********************************************************************
1177 * wglSwapIntervalEXT
1178 *
1179 * Provided by the WGL_EXT_swap_control extension.
1180 */
1181 BOOL WINAPI wglSwapIntervalEXT( int interval )
1182 {
1183 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1184
1185 if (!funcs->ext.p_wglSwapIntervalEXT) return FALSE;
1186 return funcs->ext.p_wglSwapIntervalEXT( interval );
1187 }
1188
1189 /***********************************************************************
1190 * wglGetSwapIntervalEXT
1191 *
1192 * Provided by the WGL_EXT_swap_control extension.
1193 */
1194 int WINAPI wglGetSwapIntervalEXT(void)
1195 {
1196 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1197
1198 if (!funcs->ext.p_wglGetSwapIntervalEXT) return FALSE;
1199 return funcs->ext.p_wglGetSwapIntervalEXT();
1200 }
1201
1202 /***********************************************************************
1203 * wglSetPixelFormatWINE
1204 *
1205 * Provided by the WGL_WINE_pixel_format_passthrough extension.
1206 */
1207 BOOL WINAPI wglSetPixelFormatWINE( HDC hdc, int format )
1208 {
1209 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1210
1211 if (!funcs || !funcs->ext.p_wglSetPixelFormatWINE) return FALSE;
1212 return funcs->ext.p_wglSetPixelFormatWINE( hdc, format );
1213 }
1214
1215 /***********************************************************************
1216 * wglUseFontBitmaps_common
1217 */
1218 static BOOL wglUseFontBitmaps_common( HDC hdc, DWORD first, DWORD count, DWORD listBase, BOOL unicode )
1219 {
1220 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1221 GLYPHMETRICS gm;
1222 unsigned int glyph, size = 0;
1223 void *bitmap = NULL, *gl_bitmap = NULL;
1224 int org_alignment;
1225 BOOL ret = TRUE;
1226
1227 funcs->gl.p_glGetIntegerv(GL_UNPACK_ALIGNMENT, &org_alignment);
1228 funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
1229
1230 for (glyph = first; glyph < first + count; glyph++) {
1231 unsigned int needed_size, height, width, width_int;
1232
1233 if (unicode)
1234 needed_size = GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1235 else
1236 needed_size = GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1237
1238 TRACE("Glyph: %3d / List: %d size %d\n", glyph, listBase, needed_size);
1239 if (needed_size == GDI_ERROR) {
1240 ret = FALSE;
1241 break;
1242 }
1243
1244 if (needed_size > size) {
1245 size = needed_size;
1246 HeapFree(GetProcessHeap(), 0, bitmap);
1247 HeapFree(GetProcessHeap(), 0, gl_bitmap);
1248 bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1249 gl_bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1250 }
1251 if (needed_size != 0) {
1252 if (unicode)
1253 ret = (GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm,
1254 size, bitmap, &identity) != GDI_ERROR);
1255 else
1256 ret = (GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm,
1257 size, bitmap, &identity) != GDI_ERROR);
1258 if (!ret) break;
1259 }
1260
1261 if (TRACE_ON(wgl)) {
1262 unsigned int bitmask;
1263 unsigned char *bitmap_ = bitmap;
1264
1265 TRACE(" - bbox: %d x %d\n", gm.gmBlackBoxX, gm.gmBlackBoxY);
1266 TRACE(" - origin: (%d, %d)\n", gm.gmptGlyphOrigin.x, gm.gmptGlyphOrigin.y);
1267 TRACE(" - increment: %d - %d\n", gm.gmCellIncX, gm.gmCellIncY);
1268 if (needed_size != 0) {
1269 TRACE(" - bitmap:\n");
1270 for (height = 0; height < gm.gmBlackBoxY; height++) {
1271 TRACE(" ");
1272 for (width = 0, bitmask = 0x80; width < gm.gmBlackBoxX; width++, bitmask >>= 1) {
1273 if (bitmask == 0) {
1274 bitmap_ += 1;
1275 bitmask = 0x80;
1276 }
1277 if (*bitmap_ & bitmask)
1278 TRACE("*");
1279 else
1280 TRACE(" ");
1281 }
1282 bitmap_ += (4 - ((UINT_PTR)bitmap_ & 0x03));
1283 TRACE("\n");
1284 }
1285 }
1286 }
1287
1288 /* In OpenGL, the bitmap is drawn from the bottom to the top... So we need to invert the
1289 * glyph for it to be drawn properly.
1290 */
1291 if (needed_size != 0) {
1292 width_int = (gm.gmBlackBoxX + 31) / 32;
1293 for (height = 0; height < gm.gmBlackBoxY; height++) {
1294 for (width = 0; width < width_int; width++) {
1295 ((int *) gl_bitmap)[(gm.gmBlackBoxY - height - 1) * width_int + width] =
1296 ((int *) bitmap)[height * width_int + width];
1297 }
1298 }
1299 }
1300
1301 funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1302 if (needed_size != 0) {
1303 funcs->gl.p_glBitmap(gm.gmBlackBoxX, gm.gmBlackBoxY,
1304 0 - gm.gmptGlyphOrigin.x, (int) gm.gmBlackBoxY - gm.gmptGlyphOrigin.y,
1305 gm.gmCellIncX, gm.gmCellIncY,
1306 gl_bitmap);
1307 } else {
1308 /* This is the case of 'empty' glyphs like the space character */
1309 funcs->gl.p_glBitmap(0, 0, 0, 0, gm.gmCellIncX, gm.gmCellIncY, NULL);
1310 }
1311 funcs->gl.p_glEndList();
1312 }
1313
1314 funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, org_alignment);
1315 HeapFree(GetProcessHeap(), 0, bitmap);
1316 HeapFree(GetProcessHeap(), 0, gl_bitmap);
1317 return ret;
1318 }
1319
1320 /***********************************************************************
1321 * wglUseFontBitmapsA (OPENGL32.@)
1322 */
1323 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1324 {
1325 return wglUseFontBitmaps_common( hdc, first, count, listBase, FALSE );
1326 }
1327
1328 /***********************************************************************
1329 * wglUseFontBitmapsW (OPENGL32.@)
1330 */
1331 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1332 {
1333 return wglUseFontBitmaps_common( hdc, first, count, listBase, TRUE );
1334 }
1335
1336 /* FIXME: should probably have a glu.h header */
1337
1338 typedef struct GLUtesselator GLUtesselator;
1339 typedef void (WINAPI *_GLUfuncptr)(void);
1340
1341 #define GLU_TESS_BEGIN 100100
1342 #define GLU_TESS_VERTEX 100101
1343 #define GLU_TESS_END 100102
1344
1345 static GLUtesselator * (WINAPI *pgluNewTess)(void);
1346 static void (WINAPI *pgluDeleteTess)(GLUtesselator *tess);
1347 static void (WINAPI *pgluTessNormal)(GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z);
1348 static void (WINAPI *pgluTessBeginPolygon)(GLUtesselator *tess, void *polygon_data);
1349 static void (WINAPI *pgluTessEndPolygon)(GLUtesselator *tess);
1350 static void (WINAPI *pgluTessCallback)(GLUtesselator *tess, GLenum which, _GLUfuncptr fn);
1351 static void (WINAPI *pgluTessBeginContour)(GLUtesselator *tess);
1352 static void (WINAPI *pgluTessEndContour)(GLUtesselator *tess);
1353 static void (WINAPI *pgluTessVertex)(GLUtesselator *tess, GLdouble *location, GLvoid* data);
1354
1355 static HMODULE load_libglu(void)
1356 {
1357 static const WCHAR glu32W[] = {'g','l','u','3','2','.','d','l','l',0};
1358 static BOOL already_loaded;
1359 static HMODULE module;
1360
1361 if (already_loaded) return module;
1362 already_loaded = TRUE;
1363
1364 TRACE("Trying to load GLU library\n");
1365 module = LoadLibraryW( glu32W );
1366 if (!module)
1367 {
1368 WARN("Failed to load glu32\n");
1369 return NULL;
1370 }
1371 #define LOAD_FUNCPTR(f) p##f = (void *)GetProcAddress( module, #f )
1372 LOAD_FUNCPTR(gluNewTess);
1373 LOAD_FUNCPTR(gluDeleteTess);
1374 LOAD_FUNCPTR(gluTessBeginContour);
1375 LOAD_FUNCPTR(gluTessNormal);
1376 LOAD_FUNCPTR(gluTessBeginPolygon);
1377 LOAD_FUNCPTR(gluTessCallback);
1378 LOAD_FUNCPTR(gluTessEndContour);
1379 LOAD_FUNCPTR(gluTessEndPolygon);
1380 LOAD_FUNCPTR(gluTessVertex);
1381 #undef LOAD_FUNCPTR
1382 return module;
1383 }
1384
1385 static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
1386 {
1387 vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
1388 vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
1389 vertex[2] = 0.0;
1390 }
1391
1392 static void WINAPI tess_callback_vertex(GLvoid *vertex)
1393 {
1394 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1395 GLdouble *dbl = vertex;
1396 TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
1397 funcs->gl.p_glVertex3dv(vertex);
1398 }
1399
1400 static void WINAPI tess_callback_begin(GLenum which)
1401 {
1402 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1403 TRACE("%d\n", which);
1404 funcs->gl.p_glBegin(which);
1405 }
1406
1407 static void WINAPI tess_callback_end(void)
1408 {
1409 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1410 TRACE("\n");
1411 funcs->gl.p_glEnd();
1412 }
1413
1414 typedef struct _bezier_vector {
1415 GLdouble x;
1416 GLdouble y;
1417 } bezier_vector;
1418
1419 static double bezier_deviation_squared(const bezier_vector *p)
1420 {
1421 bezier_vector deviation;
1422 bezier_vector vertex;
1423 bezier_vector base;
1424 double base_length;
1425 double dot;
1426
1427 vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4 - p[0].x;
1428 vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4 - p[0].y;
1429
1430 base.x = p[2].x - p[0].x;
1431 base.y = p[2].y - p[0].y;
1432
1433 base_length = sqrt(base.x*base.x + base.y*base.y);
1434 base.x /= base_length;
1435 base.y /= base_length;
1436
1437 dot = base.x*vertex.x + base.y*vertex.y;
1438 dot = min(max(dot, 0.0), base_length);
1439 base.x *= dot;
1440 base.y *= dot;
1441
1442 deviation.x = vertex.x-base.x;
1443 deviation.y = vertex.y-base.y;
1444
1445 return deviation.x*deviation.x + deviation.y*deviation.y;
1446 }
1447
1448 static int bezier_approximate(const bezier_vector *p, bezier_vector *points, FLOAT deviation)
1449 {
1450 bezier_vector first_curve[3];
1451 bezier_vector second_curve[3];
1452 bezier_vector vertex;
1453 int total_vertices;
1454
1455 if(bezier_deviation_squared(p) <= deviation*deviation)
1456 {
1457 if(points)
1458 *points = p[2];
1459 return 1;
1460 }
1461
1462 vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4;
1463 vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4;
1464
1465 first_curve[0] = p[0];
1466 first_curve[1].x = (p[0].x + p[1].x)/2;
1467 first_curve[1].y = (p[0].y + p[1].y)/2;
1468 first_curve[2] = vertex;
1469
1470 second_curve[0] = vertex;
1471 second_curve[1].x = (p[2].x + p[1].x)/2;
1472 second_curve[1].y = (p[2].y + p[1].y)/2;
1473 second_curve[2] = p[2];
1474
1475 total_vertices = bezier_approximate(first_curve, points, deviation);
1476 if(points)
1477 points += total_vertices;
1478 total_vertices += bezier_approximate(second_curve, points, deviation);
1479 return total_vertices;
1480 }
1481
1482 /***********************************************************************
1483 * wglUseFontOutlines_common
1484 */
1485 static BOOL wglUseFontOutlines_common(HDC hdc,
1486 DWORD first,
1487 DWORD count,
1488 DWORD listBase,
1489 FLOAT deviation,
1490 FLOAT extrusion,
1491 int format,
1492 LPGLYPHMETRICSFLOAT lpgmf,
1493 BOOL unicode)
1494 {
1495 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1496 UINT glyph;
1497 GLUtesselator *tess = NULL;
1498 LOGFONTW lf;
1499 HFONT old_font, unscaled_font;
1500 UINT em_size = 1024;
1501 RECT rc;
1502
1503 TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
1504 listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
1505
1506 if(deviation <= 0.0)
1507 deviation = 1.0/em_size;
1508
1509 if(format == WGL_FONT_POLYGONS)
1510 {
1511 if (!load_libglu())
1512 {
1513 ERR("glu32 is required for this function but isn't available\n");
1514 return FALSE;
1515 }
1516
1517 tess = pgluNewTess();
1518 if(!tess) return FALSE;
1519 pgluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)tess_callback_vertex);
1520 pgluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)tess_callback_begin);
1521 pgluTessCallback(tess, GLU_TESS_END, tess_callback_end);
1522 }
1523
1524 GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
1525 rc.left = rc.right = rc.bottom = 0;
1526 rc.top = em_size;
1527 DPtoLP(hdc, (POINT*)&rc, 2);
1528 lf.lfHeight = -abs(rc.top - rc.bottom);
1529 lf.lfOrientation = lf.lfEscapement = 0;
1530 unscaled_font = CreateFontIndirectW(&lf);
1531 old_font = SelectObject(hdc, unscaled_font);
1532
1533 for (glyph = first; glyph < first + count; glyph++)
1534 {
1535 DWORD needed;
1536 GLYPHMETRICS gm;
1537 BYTE *buf;
1538 TTPOLYGONHEADER *pph;
1539 TTPOLYCURVE *ppc;
1540 GLdouble *vertices = NULL;
1541 int vertex_total = -1;
1542
1543 if(unicode)
1544 needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1545 else
1546 needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1547
1548 if(needed == GDI_ERROR)
1549 goto error;
1550
1551 buf = HeapAlloc(GetProcessHeap(), 0, needed);
1552
1553 if(unicode)
1554 GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1555 else
1556 GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1557
1558 TRACE("glyph %d\n", glyph);
1559
1560 if(lpgmf)
1561 {
1562 lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
1563 lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
1564 lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
1565 lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
1566 lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
1567 lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
1568
1569 TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
1570 lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
1571 lpgmf++;
1572 }
1573
1574 funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1575 funcs->gl.p_glFrontFace(GL_CCW);
1576 if(format == WGL_FONT_POLYGONS)
1577 {
1578 funcs->gl.p_glNormal3d(0.0, 0.0, 1.0);
1579 pgluTessNormal(tess, 0, 0, 1);
1580 pgluTessBeginPolygon(tess, NULL);
1581 }
1582
1583 while(!vertices)
1584 {
1585 if(vertex_total != -1)
1586 vertices = HeapAlloc(GetProcessHeap(), 0, vertex_total * 3 * sizeof(GLdouble));
1587 vertex_total = 0;
1588
1589 pph = (TTPOLYGONHEADER*)buf;
1590 while((BYTE*)pph < buf + needed)
1591 {
1592 GLdouble previous[3];
1593 fixed_to_double(pph->pfxStart, em_size, previous);
1594
1595 if(vertices)
1596 TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
1597
1598 if(format == WGL_FONT_POLYGONS)
1599 pgluTessBeginContour(tess);
1600 else
1601 funcs->gl.p_glBegin(GL_LINE_LOOP);
1602
1603 if(vertices)
1604 {
1605 fixed_to_double(pph->pfxStart, em_size, vertices);
1606 if(format == WGL_FONT_POLYGONS)
1607 pgluTessVertex(tess, vertices, vertices);
1608 else
1609 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1610 vertices += 3;
1611 }
1612 vertex_total++;
1613
1614 ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
1615 while((char*)ppc < (char*)pph + pph->cb)
1616 {
1617 int i, j;
1618 int num;
1619
1620 switch(ppc->wType) {
1621 case TT_PRIM_LINE:
1622 for(i = 0; i < ppc->cpfx; i++)
1623 {
1624 if(vertices)
1625 {
1626 TRACE("\t\tline to %d, %d\n",
1627 ppc->apfx[i].x.value, ppc->apfx[i].y.value);
1628 fixed_to_double(ppc->apfx[i], em_size, vertices);
1629 if(format == WGL_FONT_POLYGONS)
1630 pgluTessVertex(tess, vertices, vertices);
1631 else
1632 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1633 vertices += 3;
1634 }
1635 fixed_to_double(ppc->apfx[i], em_size, previous);
1636 vertex_total++;
1637 }
1638 break;
1639
1640 case TT_PRIM_QSPLINE:
1641 for(i = 0; i < ppc->cpfx-1; i++)
1642 {
1643 bezier_vector curve[3];
1644 bezier_vector *points;
1645 GLdouble curve_vertex[3];
1646
1647 if(vertices)
1648 TRACE("\t\tcurve %d,%d %d,%d\n",
1649 ppc->apfx[i].x.value, ppc->apfx[i].y.value,
1650 ppc->apfx[i + 1].x.value, ppc->apfx[i + 1].y.value);
1651
1652 curve[0].x = previous[0];
1653 curve[0].y = previous[1];
1654 fixed_to_double(ppc->apfx[i], em_size, curve_vertex);
1655 curve[1].x = curve_vertex[0];
1656 curve[1].y = curve_vertex[1];
1657 fixed_to_double(ppc->apfx[i + 1], em_size, curve_vertex);
1658 curve[2].x = curve_vertex[0];
1659 curve[2].y = curve_vertex[1];
1660 if(i < ppc->cpfx-2)
1661 {
1662 curve[2].x = (curve[1].x + curve[2].x)/2;
1663 curve[2].y = (curve[1].y + curve[2].y)/2;
1664 }
1665 num = bezier_approximate(curve, NULL, deviation);
1666 points = HeapAlloc(GetProcessHeap(), 0, num*sizeof(bezier_vector));
1667 num = bezier_approximate(curve, points, deviation);
1668 vertex_total += num;
1669 if(vertices)
1670 {
1671 for(j=0; j<num; j++)
1672 {
1673 TRACE("\t\t\tvertex at %f,%f\n", points[j].x, points[j].y);
1674 vertices[0] = points[j].x;
1675 vertices[1] = points[j].y;
1676 vertices[2] = 0.0;
1677 if(format == WGL_FONT_POLYGONS)
1678 pgluTessVertex(tess, vertices, vertices);
1679 else
1680 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1681 vertices += 3;
1682 }
1683 }
1684 HeapFree(GetProcessHeap(), 0, points);
1685 previous[0] = curve[2].x;
1686 previous[1] = curve[2].y;
1687 }
1688 break;
1689 default:
1690 ERR("\t\tcurve type = %d\n", ppc->wType);
1691 if(format == WGL_FONT_POLYGONS)
1692 pgluTessEndContour(tess);
1693 else
1694 funcs->gl.p_glEnd();
1695 goto error_in_list;
1696 }
1697
1698 ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
1699 (ppc->cpfx - 1) * sizeof(POINTFX));
1700 }
1701 if(format == WGL_FONT_POLYGONS)
1702 pgluTessEndContour(tess);
1703 else
1704 funcs->gl.p_glEnd();
1705 pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
1706 }
1707 }
1708
1709 error_in_list:
1710 if(format == WGL_FONT_POLYGONS)
1711 pgluTessEndPolygon(tess);
1712 funcs->gl.p_glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
1713 funcs->gl.p_glEndList();
1714 HeapFree(GetProcessHeap(), 0, buf);
1715 HeapFree(GetProcessHeap(), 0, vertices);
1716 }
1717
1718 error:
1719 DeleteObject(SelectObject(hdc, old_font));
1720 if(format == WGL_FONT_POLYGONS)
1721 pgluDeleteTess(tess);
1722 return TRUE;
1723
1724 }
1725
1726 /***********************************************************************
1727 * wglUseFontOutlinesA (OPENGL32.@)
1728 */
1729 BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
1730 DWORD first,
1731 DWORD count,
1732 DWORD listBase,
1733 FLOAT deviation,
1734 FLOAT extrusion,
1735 int format,
1736 LPGLYPHMETRICSFLOAT lpgmf)
1737 {
1738 return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
1739 }
1740
1741 /***********************************************************************
1742 * wglUseFontOutlinesW (OPENGL32.@)
1743 */
1744 BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
1745 DWORD first,
1746 DWORD count,
1747 DWORD listBase,
1748 FLOAT deviation,
1749 FLOAT extrusion,
1750 int format,
1751 LPGLYPHMETRICSFLOAT lpgmf)
1752 {
1753 return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
1754 }
1755
1756 /***********************************************************************
1757 * glDebugEntry (OPENGL32.@)
1758 */
1759 GLint WINAPI glDebugEntry( GLint unknown1, GLint unknown2 )
1760 {
1761 return 0;
1762 }
1763
1764 static GLubyte *filter_extensions_list(const char *extensions, const char *disabled)
1765 {
1766 char *p, *str;
1767 const char *end;
1768
1769 p = str = HeapAlloc(GetProcessHeap(), 0, strlen(extensions) + 2);
1770 if (!str)
1771 return NULL;
1772 for (;;)
1773 {
1774 while (*extensions == ' ')
1775 extensions++;
1776 if (!*extensions)
1777 break;
1778 if (!(end = strchr(extensions, ' ')))
1779 end = extensions + strlen(extensions);
1780 memcpy(p, extensions, end - extensions);
1781 p[end - extensions] = 0;
1782 if (!has_extension(disabled, p, strlen(p)))
1783 {
1784 TRACE("++ %s\n", p);
1785 p += end - extensions;
1786 *p++ = ' ';
1787 }
1788 else
1789 {
1790 TRACE("-- %s (disabled by config)\n", p);
1791 }
1792 extensions = end;
1793 }
1794 *p = 0;
1795 return (GLubyte *)str;
1796 }
1797
1798 static GLuint *filter_extensions_index(const char *disabled)
1799 {
1800 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1801 const char *ext, *end, *gl_ext;
1802 GLuint *disabled_exts, *new_disabled_exts;
1803 unsigned int i = 0, j, disabled_size;
1804 GLint extensions_count;
1805
1806 if (!funcs->ext.p_glGetStringi)
1807 {
1808 void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
1809
1810 *func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
1811 if (!funcs->ext.p_glGetStringi)
1812 return NULL;
1813 }
1814
1815 funcs->gl.p_glGetIntegerv(GL_NUM_EXTENSIONS, &extensions_count);
1816 disabled_size = 2;
1817 disabled_exts = HeapAlloc(GetProcessHeap(), 0, disabled_size * sizeof(*disabled_exts));
1818 if (!disabled_exts)
1819 return NULL;
1820 for (j = 0; j < extensions_count; ++j)
1821 {
1822 gl_ext = (const char *)funcs->ext.p_glGetStringi(GL_EXTENSIONS, j);
1823 ext = disabled;
1824 for (;;)
1825 {
1826 while (*ext == ' ')
1827 ext++;
1828 if (!*ext)
1829 {
1830 TRACE("++ %s\n", gl_ext);
1831 break;
1832 }
1833 if (!(end = strchr(ext, ' ')))
1834 end = ext + strlen(ext);
1835
1836 if (!strncmp(gl_ext, ext, end - ext) && !gl_ext[end - ext])
1837 {
1838 if (i + 1 == disabled_size)
1839 {
1840 disabled_size *= 2;
1841 new_disabled_exts = HeapReAlloc(GetProcessHeap(), 0, disabled_exts,
1842 disabled_size * sizeof(*disabled_exts));
1843 if (!new_disabled_exts)
1844 {
1845 disabled_exts[i] = ~0u;
1846 return disabled_exts;
1847 }
1848 disabled_exts = new_disabled_exts;
1849 }
1850 TRACE("-- %s (disabled by config)\n", gl_ext);
1851 disabled_exts[i++] = j;
1852 break;
1853 }
1854 ext = end;
1855 }
1856 }
1857 disabled_exts[i] = ~0u;
1858 return disabled_exts;
1859 }
1860
1861 /* build the extension string by filtering out the disabled extensions */
1862 static BOOL filter_extensions(const char *extensions, GLubyte **exts_list, GLuint **disabled_exts)
1863 {
1864 static const char *disabled;
1865
1866 TRACE( "GL_EXTENSIONS:\n" );
1867
1868 if (!disabled)
1869 {
1870 HKEY hkey;
1871 DWORD size;
1872 char *str = NULL;
1873
1874 /* @@ Wine registry key: HKCU\Software\Wine\OpenGL */
1875 if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey ))
1876 {
1877 if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, NULL, &size ))
1878 {
1879 str = HeapAlloc( GetProcessHeap(), 0, size );
1880 if (RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (BYTE *)str, &size )) *str = 0;
1881 }
1882 RegCloseKey( hkey );
1883 }
1884 if (str)
1885 {
1886 if (InterlockedCompareExchangePointer( (void **)&disabled, str, NULL ))
1887 HeapFree( GetProcessHeap(), 0, str );
1888 }
1889 else disabled = "";
1890 }
1891
1892 if (!disabled[0])
1893 return FALSE;
1894
1895 if (extensions && !*exts_list)
1896 *exts_list = filter_extensions_list(extensions, disabled);
1897
1898 if (!*disabled_exts)
1899 *disabled_exts = filter_extensions_index(disabled);
1900
1901 return (exts_list && *exts_list) || *disabled_exts;
1902 }
1903
1904 /***********************************************************************
1905 * glGetString (OPENGL32.@)
1906 */
1907 const GLubyte * WINAPI glGetString( GLenum name )
1908 {
1909 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1910 const GLubyte *ret = funcs->gl.p_glGetString( name );
1911
1912 if (name == GL_EXTENSIONS && ret)
1913 {
1914 struct wgl_handle *ptr = get_current_context_ptr();
1915 if (ptr->u.context->extensions ||
1916 filter_extensions((const char *)ret, &ptr->u.context->extensions, &ptr->u.context->disabled_exts))
1917 ret = ptr->u.context->extensions;
1918 }
1919 return ret;
1920 }
1921
1922 /***********************************************************************
1923 * OpenGL initialisation routine
1924 */
1925 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
1926 {
1927 switch(reason)
1928 {
1929 case DLL_PROCESS_ATTACH:
1930 NtCurrentTeb()->glTable = &null_opengl_funcs;
1931 break;
1932 case DLL_THREAD_ATTACH:
1933 NtCurrentTeb()->glTable = &null_opengl_funcs;
1934 break;
1935 }
1936 return TRUE;
1937 }
Maarten's multimedia branch