dlls/opengl32/wgl.c

   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 static HMODULE opengl32_handle;
  47
  48 extern struct opengl_funcs null_opengl_funcs;
  49
  50 const GLubyte * WINAPI wine_glGetString( GLenum name );
  51
  52 /* handle management */
  53
  54 #define MAX_WGL_HANDLES 1024
  55
  56 enum wgl_handle_type
  57 {
  58     HANDLE_CONTEXT = 0 << 12,
  59     HANDLE_PBUFFER = 1 << 12,
  60     HANDLE_TYPE_MASK = 15 << 12
  61 };
  62
  63 struct opengl_context
  64 {
  65     DWORD               tid;         /* thread that the context is current in */
  66     HDC                 draw_dc;     /* current drawing DC */
  67     HDC                 read_dc;     /* current reading DC */
  68     GLubyte            *extensions;  /* extension string */
  69     struct wgl_context *drv_ctx;     /* driver context */
  70 };
  71
  72 struct wgl_handle
  73 {
  74     UINT                 handle;
  75     struct opengl_funcs *funcs;
  76     union
  77     {
  78         struct opengl_context *context;  /* for HANDLE_CONTEXT */
  79         struct wgl_pbuffer    *pbuffer;  /* for HANDLE_PBUFFER */
  80         struct wgl_handle     *next;     /* for free handles */
  81     } u;
  82 };
  83
  84 static struct wgl_handle wgl_handles[MAX_WGL_HANDLES];
  85 static struct wgl_handle *next_free;
  86 static unsigned int handle_count;
  87
  88 static CRITICAL_SECTION wgl_section;
  89 static CRITICAL_SECTION_DEBUG critsect_debug =
  90 {
  91     0, 0, &wgl_section,
  92     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  93       0, 0, { (DWORD_PTR)(__FILE__ ": wgl_section") }
  94 };
  95 static CRITICAL_SECTION wgl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  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 /***********************************************************************
 169  *              wglCopyContext (OPENGL32.@)
 170  */
 171 BOOL WINAPI wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
 172 {
 173     struct wgl_handle *src, *dst;
 174     BOOL ret = FALSE;
 175
 176     if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
 177     if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
 178     {
 179         if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
 180         else ret = src->funcs->wgl.p_wglCopyContext( src->u.context->drv_ctx,
 181                                                      dst->u.context->drv_ctx, mask );
 182     }
 183     release_handle_ptr( dst );
 184     release_handle_ptr( src );
 185     return ret;
 186 }
 187
 188 /***********************************************************************
 189  *              wglDeleteContext (OPENGL32.@)
 190  */
 191 BOOL WINAPI wglDeleteContext(HGLRC hglrc)
 192 {
 193     struct wgl_handle *ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT );
 194
 195     if (!ptr) return FALSE;
 196
 197     if (ptr->u.context->tid && ptr->u.context->tid != GetCurrentThreadId())
 198     {
 199         SetLastError( ERROR_BUSY );
 200         release_handle_ptr( ptr );
 201         return FALSE;
 202     }
 203     if (hglrc == NtCurrentTeb()->glCurrentRC) wglMakeCurrent( 0, 0 );
 204     ptr->funcs->wgl.p_wglDeleteContext( ptr->u.context->drv_ctx );
 205     HeapFree( GetProcessHeap(), 0, ptr->u.context->extensions );
 206     HeapFree( GetProcessHeap(), 0, ptr->u.context );
 207     free_handle_ptr( ptr );
 208     return TRUE;
 209 }
 210
 211 /***********************************************************************
 212  *              wglMakeCurrent (OPENGL32.@)
 213  */
 214 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
 215 {
 216     BOOL ret = TRUE;
 217     struct wgl_handle *ptr, *prev = get_current_context_ptr();
 218
 219     if (hglrc)
 220     {
 221         if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
 222         if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
 223         {
 224             ret = ptr->funcs->wgl.p_wglMakeCurrent( hdc, ptr->u.context->drv_ctx );
 225             if (ret)
 226             {
 227                 if (prev) prev->u.context->tid = 0;
 228                 ptr->u.context->tid = GetCurrentThreadId();
 229                 ptr->u.context->draw_dc = hdc;
 230                 ptr->u.context->read_dc = hdc;
 231                 NtCurrentTeb()->glCurrentRC = hglrc;
 232                 NtCurrentTeb()->glTable = ptr->funcs;
 233             }
 234         }
 235         else
 236         {
 237             SetLastError( ERROR_BUSY );
 238             ret = FALSE;
 239         }
 240         release_handle_ptr( ptr );
 241     }
 242     else if (prev)
 243     {
 244         if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
 245         prev->u.context->tid = 0;
 246         NtCurrentTeb()->glCurrentRC = 0;
 247         NtCurrentTeb()->glTable = &null_opengl_funcs;
 248     }
 249     else if (!hdc)
 250     {
 251         SetLastError( ERROR_INVALID_HANDLE );
 252         ret = FALSE;
 253     }
 254     return ret;
 255 }
 256
 257 /***********************************************************************
 258  *              wglCreateContextAttribsARB
 259  *
 260  * Provided by the WGL_ARB_create_context extension.
 261  */
 262 HGLRC WINAPI wglCreateContextAttribsARB( HDC hdc, HGLRC share, const int *attribs )
 263 {
 264     HGLRC ret = 0;
 265     struct wgl_context *drv_ctx;
 266     struct wgl_handle *share_ptr = NULL;
 267     struct opengl_context *context;
 268     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 269
 270     if (!funcs || !funcs->ext.p_wglCreateContextAttribsARB) return 0;
 271     if (share && !(share_ptr = get_handle_ptr( share, HANDLE_CONTEXT ))) return 0;
 272     if ((drv_ctx = funcs->ext.p_wglCreateContextAttribsARB( hdc,
 273                                               share_ptr ? share_ptr->u.context->drv_ctx : NULL, attribs )))
 274     {
 275         if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
 276         {
 277             context->drv_ctx = drv_ctx;
 278             if (!(ret = alloc_handle( HANDLE_CONTEXT, funcs, context )))
 279                 HeapFree( GetProcessHeap(), 0, context );
 280         }
 281         if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
 282     }
 283     release_handle_ptr( share_ptr );
 284     return ret;
 285
 286 }
 287
 288 /***********************************************************************
 289  *              wglMakeContextCurrentARB
 290  *
 291  * Provided by the WGL_ARB_make_current_read extension.
 292  */
 293 BOOL WINAPI wglMakeContextCurrentARB( HDC draw_hdc, HDC read_hdc, HGLRC hglrc )
 294 {
 295     BOOL ret = TRUE;
 296     struct wgl_handle *ptr, *prev = get_current_context_ptr();
 297
 298     if (hglrc)
 299     {
 300         if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
 301         if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
 302         {
 303             ret = (ptr->funcs->ext.p_wglMakeContextCurrentARB &&
 304                    ptr->funcs->ext.p_wglMakeContextCurrentARB( draw_hdc, read_hdc,
 305                                                                ptr->u.context->drv_ctx ));
 306             if (ret)
 307             {
 308                 if (prev) prev->u.context->tid = 0;
 309                 ptr->u.context->tid = GetCurrentThreadId();
 310                 ptr->u.context->draw_dc = draw_hdc;
 311                 ptr->u.context->read_dc = read_hdc;
 312                 NtCurrentTeb()->glCurrentRC = hglrc;
 313                 NtCurrentTeb()->glTable = ptr->funcs;
 314             }
 315         }
 316         else
 317         {
 318             SetLastError( ERROR_BUSY );
 319             ret = FALSE;
 320         }
 321         release_handle_ptr( ptr );
 322     }
 323     else if (prev)
 324     {
 325         if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
 326         prev->u.context->tid = 0;
 327         NtCurrentTeb()->glCurrentRC = 0;
 328         NtCurrentTeb()->glTable = &null_opengl_funcs;
 329     }
 330     return ret;
 331 }
 332
 333 /***********************************************************************
 334  *              wglGetCurrentReadDCARB
 335  *
 336  * Provided by the WGL_ARB_make_current_read extension.
 337  */
 338 HDC WINAPI wglGetCurrentReadDCARB(void)
 339 {
 340     struct wgl_handle *ptr = get_current_context_ptr();
 341
 342     if (!ptr) return 0;
 343     return ptr->u.context->read_dc;
 344 }
 345
 346 /***********************************************************************
 347  *              wglShareLists (OPENGL32.@)
 348  */
 349 BOOL WINAPI wglShareLists(HGLRC hglrcSrc, HGLRC hglrcDst)
 350 {
 351     BOOL ret = FALSE;
 352     struct wgl_handle *src, *dst;
 353
 354     if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
 355     if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
 356     {
 357         if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
 358         else ret = src->funcs->wgl.p_wglShareLists( src->u.context->drv_ctx, dst->u.context->drv_ctx );
 359     }
 360     release_handle_ptr( dst );
 361     release_handle_ptr( src );
 362     return ret;
 363 }
 364
 365 /***********************************************************************
 366  *              wglGetCurrentDC (OPENGL32.@)
 367  */
 368 HDC WINAPI wglGetCurrentDC(void)
 369 {
 370     struct wgl_handle *ptr = get_current_context_ptr();
 371
 372     if (!ptr) return 0;
 373     return ptr->u.context->draw_dc;
 374 }
 375
 376 /***********************************************************************
 377  *              wglCreateContext (OPENGL32.@)
 378  */
 379 HGLRC WINAPI wglCreateContext(HDC hdc)
 380 {
 381     HGLRC ret = 0;
 382     struct wgl_context *drv_ctx;
 383     struct opengl_context *context;
 384     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 385
 386     if (!funcs) return 0;
 387     if (!(drv_ctx = funcs->wgl.p_wglCreateContext( hdc ))) return 0;
 388     if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
 389     {
 390         context->drv_ctx = drv_ctx;
 391         if (!(ret = alloc_handle( HANDLE_CONTEXT, funcs, context )))
 392             HeapFree( GetProcessHeap(), 0, context );
 393     }
 394     if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
 395     return ret;
 396 }
 397
 398 /***********************************************************************
 399  *              wglGetCurrentContext (OPENGL32.@)
 400  */
 401 HGLRC WINAPI wglGetCurrentContext(void)
 402 {
 403     return NtCurrentTeb()->glCurrentRC;
 404 }
 405
 406 /***********************************************************************
 407  *              wglDescribePixelFormat (OPENGL32.@)
 408  */
 409 INT WINAPI wglDescribePixelFormat(HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
 410 {
 411     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 412     if (!funcs) return 0;
 413     return funcs->wgl.p_wglDescribePixelFormat( hdc, format, size, descr );
 414 }
 415
 416 /***********************************************************************
 417  *              wglChoosePixelFormat (OPENGL32.@)
 418  */
 419 INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
 420 {
 421     PIXELFORMATDESCRIPTOR format, best;
 422     int i, count, best_format;
 423     int bestDBuffer = -1, bestStereo = -1;
 424
 425     TRACE_(wgl)( "%p %p: size %u version %u flags %u type %u color %u %u,%u,%u,%u "
 426                  "accum %u depth %u stencil %u aux %u\n",
 427                  hdc, ppfd, ppfd->nSize, ppfd->nVersion, ppfd->dwFlags, ppfd->iPixelType,
 428                  ppfd->cColorBits, ppfd->cRedBits, ppfd->cGreenBits, ppfd->cBlueBits, ppfd->cAlphaBits,
 429                  ppfd->cAccumBits, ppfd->cDepthBits, ppfd->cStencilBits, ppfd->cAuxBuffers );
 430
 431     count = wglDescribePixelFormat( hdc, 0, 0, NULL );
 432     if (!count) return 0;
 433
 434     best_format = 0;
 435     best.dwFlags = 0;
 436     best.cAlphaBits = -1;
 437     best.cColorBits = -1;
 438     best.cDepthBits = -1;
 439     best.cStencilBits = -1;
 440     best.cAuxBuffers = -1;
 441
 442     for (i = 1; i <= count; i++)
 443     {
 444         if (!wglDescribePixelFormat( hdc, i, sizeof(format), &format )) continue;
 445
 446         if (ppfd->iPixelType != format.iPixelType)
 447         {
 448             TRACE( "pixel type mismatch for iPixelFormat=%d\n", i );
 449             continue;
 450         }
 451
 452         /* only use bitmap capable for formats for bitmap rendering */
 453         if( (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) != (format.dwFlags & PFD_DRAW_TO_BITMAP))
 454         {
 455             TRACE( "PFD_DRAW_TO_BITMAP mismatch for iPixelFormat=%d\n", i );
 456             continue;
 457         }
 458
 459         /* The behavior of PDF_STEREO/PFD_STEREO_DONTCARE and PFD_DOUBLEBUFFER / PFD_DOUBLEBUFFER_DONTCARE
 460          * is not very clear on MSDN. They specify that ChoosePixelFormat tries to match pixel formats
 461          * with the flag (PFD_STEREO / PFD_DOUBLEBUFFERING) set. Otherwise it says that it tries to match
 462          * formats without the given flag set.
 463          * A test on Windows using a Radeon 9500pro on WinXP (the driver doesn't support Stereo)
 464          * has indicated that a format without stereo is returned when stereo is unavailable.
 465          * So in case PFD_STEREO is set, formats that support it should have priority above formats
 466          * without. In case PFD_STEREO_DONTCARE is set, stereo is ignored.
 467          *
 468          * To summarize the following is most likely the correct behavior:
 469          * stereo not set -> prefer non-stereo formats, but also accept stereo formats
 470          * stereo set -> prefer stereo formats, but also accept non-stereo formats
 471          * stereo don't care -> it doesn't matter whether we get stereo or not
 472          *
 473          * In Wine we will treat non-stereo the same way as don't care because it makes
 474          * format selection even more complicated and second drivers with Stereo advertise
 475          * each format twice anyway.
 476          */
 477
 478         /* Doublebuffer, see the comments above */
 479         if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE))
 480         {
 481             if (((ppfd->dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) &&
 482                 ((format.dwFlags & PFD_DOUBLEBUFFER) == (ppfd->dwFlags & PFD_DOUBLEBUFFER)))
 483                 goto found;
 484
 485             if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
 486         }
 487
 488         /* Stereo, see the comments above. */
 489         if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
 490         {
 491             if (((ppfd->dwFlags & PFD_STEREO) != bestStereo) &&
 492                 ((format.dwFlags & PFD_STEREO) == (ppfd->dwFlags & PFD_STEREO)))
 493                 goto found;
 494
 495             if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
 496         }
 497
 498         /* Below we will do a number of checks to select the 'best' pixelformat.
 499          * We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.
 500          * The code works by trying to match the most important options as close as possible.
 501          * When a reasonable format is found, we will try to match more options.
 502          * It appears (see the opengl32 test) that Windows opengl drivers ignore options
 503          * like cColorBits, cAlphaBits and friends if they are set to 0, so they are considered
 504          * as DONTCARE. At least Serious Sam TSE relies on this behavior. */
 505
 506         if (ppfd->cColorBits)
 507         {
 508             if (((ppfd->cColorBits > best.cColorBits) && (format.cColorBits > best.cColorBits)) ||
 509                 ((format.cColorBits >= ppfd->cColorBits) && (format.cColorBits < best.cColorBits)))
 510                 goto found;
 511
 512             if (best.cColorBits != format.cColorBits)  /* Do further checks if the format is compatible */
 513             {
 514                 TRACE( "color mismatch for iPixelFormat=%d\n", i );
 515                 continue;
 516             }
 517         }
 518         if (ppfd->cAlphaBits)
 519         {
 520             if (((ppfd->cAlphaBits > best.cAlphaBits) && (format.cAlphaBits > best.cAlphaBits)) ||
 521                 ((format.cAlphaBits >= ppfd->cAlphaBits) && (format.cAlphaBits < best.cAlphaBits)))
 522                 goto found;
 523
 524             if (best.cAlphaBits != format.cAlphaBits)
 525             {
 526                 TRACE( "alpha mismatch for iPixelFormat=%d\n", i );
 527                 continue;
 528             }
 529         }
 530         if (ppfd->cDepthBits)
 531         {
 532             if (((ppfd->cDepthBits > best.cDepthBits) && (format.cDepthBits > best.cDepthBits)) ||
 533                 ((format.cDepthBits >= ppfd->cDepthBits) && (format.cDepthBits < best.cDepthBits)))
 534                 goto found;
 535
 536             if (best.cDepthBits != format.cDepthBits)
 537             {
 538                 TRACE( "depth mismatch for iPixelFormat=%d\n", i );
 539                 continue;
 540             }
 541         }
 542         if (ppfd->cStencilBits)
 543         {
 544             if (((ppfd->cStencilBits > best.cStencilBits) && (format.cStencilBits > best.cStencilBits)) ||
 545                 ((format.cStencilBits >= ppfd->cStencilBits) && (format.cStencilBits < best.cStencilBits)))
 546                 goto found;
 547
 548             if (best.cStencilBits != format.cStencilBits)
 549             {
 550                 TRACE( "stencil mismatch for iPixelFormat=%d\n", i );
 551                 continue;
 552             }
 553         }
 554         if (ppfd->cAuxBuffers)
 555         {
 556             if (((ppfd->cAuxBuffers > best.cAuxBuffers) && (format.cAuxBuffers > best.cAuxBuffers)) ||
 557                 ((format.cAuxBuffers >= ppfd->cAuxBuffers) && (format.cAuxBuffers < best.cAuxBuffers)))
 558                 goto found;
 559
 560             if (best.cAuxBuffers != format.cAuxBuffers)
 561             {
 562                 TRACE( "aux mismatch for iPixelFormat=%d\n", i );
 563                 continue;
 564             }
 565         }
 566         continue;
 567
 568     found:
 569         best_format = i;
 570         best = format;
 571         bestDBuffer = format.dwFlags & PFD_DOUBLEBUFFER;
 572         bestStereo = format.dwFlags & PFD_STEREO;
 573     }
 574
 575     TRACE( "returning %u\n", best_format );
 576     return best_format;
 577 }
 578
 579 /***********************************************************************
 580  *              wglGetPixelFormat (OPENGL32.@)
 581  */
 582 INT WINAPI wglGetPixelFormat(HDC hdc)
 583 {
 584     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 585     if (!funcs) return 0;
 586     return funcs->wgl.p_wglGetPixelFormat( hdc );
 587 }
 588
 589 /***********************************************************************
 590  *               wglSetPixelFormat(OPENGL32.@)
 591  */
 592 BOOL WINAPI wglSetPixelFormat( HDC hdc, INT format, const PIXELFORMATDESCRIPTOR *descr )
 593 {
 594     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 595     if (!funcs) return 0;
 596     return funcs->wgl.p_wglSetPixelFormat( hdc, format, descr );
 597 }
 598
 599 /***********************************************************************
 600  *              wglSwapBuffers (OPENGL32.@)
 601  */
 602 BOOL WINAPI DECLSPEC_HOTPATCH wglSwapBuffers( HDC hdc )
 603 {
 604     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
 605
 606     if (!funcs || !funcs->wgl.p_wglSwapBuffers) return FALSE;
 607     if (!funcs->wgl.p_wglSwapBuffers( hdc )) return FALSE;
 608
 609     if (TRACE_ON(fps))
 610     {
 611         static long prev_time, start_time;
 612         static unsigned long frames, frames_total;
 613
 614         DWORD time = GetTickCount();
 615         frames++;
 616         frames_total++;
 617         /* every 1.5 seconds */
 618         if (time - prev_time > 1500)
 619         {
 620             TRACE_(fps)("@ approx %.2ffps, total %.2ffps\n",
 621                         1000.0*frames/(time - prev_time), 1000.0*frames_total/(time - start_time));
 622             prev_time = time;
 623             frames = 0;
 624             if (start_time == 0) start_time = time;
 625         }
 626     }
 627     return TRUE;
 628 }
 629
 630 /***********************************************************************
 631  *              wglCreateLayerContext (OPENGL32.@)
 632  */
 633 HGLRC WINAPI wglCreateLayerContext(HDC hdc,
 634                                    int iLayerPlane) {
 635   TRACE("(%p,%d)\n", hdc, iLayerPlane);
 636
 637   if (iLayerPlane == 0) {
 638       return wglCreateContext(hdc);
 639   }
 640   FIXME("no handler for layer %d\n", iLayerPlane);
 641
 642   return NULL;
 643 }
 644
 645 /***********************************************************************
 646  *              wglDescribeLayerPlane (OPENGL32.@)
 647  */
 648 BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
 649                                   int iPixelFormat,
 650                                   int iLayerPlane,
 651                                   UINT nBytes,
 652                                   LPLAYERPLANEDESCRIPTOR plpd) {
 653   FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);
 654
 655   return FALSE;
 656 }
 657
 658 /***********************************************************************
 659  *              wglGetLayerPaletteEntries (OPENGL32.@)
 660  */
 661 int WINAPI wglGetLayerPaletteEntries(HDC hdc,
 662                                      int iLayerPlane,
 663                                      int iStart,
 664                                      int cEntries,
 665                                      const COLORREF *pcr) {
 666   FIXME("(): stub!\n");
 667
 668   return 0;
 669 }
 670
 671 /* check if the extension is present in the list */
 672 static BOOL has_extension( const char *list, const char *ext )
 673 {
 674     size_t len = strlen( ext );
 675
 676     while (list)
 677     {
 678         while (*list == ' ') list++;
 679         if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
 680         list = strchr( list, ' ' );
 681     }
 682     return FALSE;
 683 }
 684
 685 static int compar(const void *elt_a, const void *elt_b) {
 686   return strcmp(((const OpenGL_extension *) elt_a)->name,
 687                 ((const OpenGL_extension *) elt_b)->name);
 688 }
 689
 690 /* Check if a GL extension is supported */
 691 static BOOL is_extension_supported(const char* extension)
 692 {
 693     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
 694     const char *gl_ext_string = (const char*)wine_glGetString(GL_EXTENSIONS);
 695
 696     TRACE("Checking for extension '%s'\n", extension);
 697
 698     if(!gl_ext_string) {
 699         ERR("No OpenGL extensions found, check if your OpenGL setup is correct!\n");
 700         return FALSE;
 701     }
 702
 703     /* We use the GetProcAddress function from the display driver to retrieve function pointers
 704      * for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
 705      * using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
 706      * require the function to return NULL when an extension isn't found. For this reason we check
 707      * if the OpenGL extension required for the function we are looking up is supported. */
 708
 709     /* Check if the extension is part of the GL extension string to see if it is supported. */
 710     if (has_extension(gl_ext_string, extension))
 711         return TRUE;
 712
 713     /* In general an OpenGL function starts as an ARB/EXT extension and at some stage
 714      * it becomes part of the core OpenGL library and can be reached without the ARB/EXT
 715      * suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
 716      * Check if we are searching for a core GL function */
 717     if(strncmp(extension, "GL_VERSION_", 11) == 0)
 718     {
 719         const GLubyte *gl_version = funcs->gl.p_glGetString(GL_VERSION);
 720         const char *version = extension + 11; /* Move past 'GL_VERSION_' */
 721
 722         if(!gl_version) {
 723             ERR("No OpenGL version found!\n");
 724             return FALSE;
 725         }
 726
 727         /* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
 728          * The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
 729         if( (gl_version[0] >= version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2])) ) {
 730             return TRUE;
 731         }
 732         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]);
 733     }
 734
 735     return FALSE;
 736 }
 737
 738 /***********************************************************************
 739  *              wglGetProcAddress (OPENGL32.@)
 740  */
 741 PROC WINAPI wglGetProcAddress(LPCSTR lpszProc)
 742 {
 743   struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
 744   void **func_ptr;
 745   void *local_func;
 746   OpenGL_extension  ext;
 747   const OpenGL_extension *ext_ret;
 748   struct wgl_handle *context = get_current_context_ptr();
 749
 750   TRACE("(%s)\n", lpszProc);
 751
 752   if (lpszProc == NULL)
 753     return NULL;
 754
 755   /* Without an active context opengl32 doesn't know to what
 756    * driver it has to dispatch wglGetProcAddress.
 757    */
 758   if (!context)
 759   {
 760     WARN("No active WGL context found\n");
 761     return NULL;
 762   }
 763
 764   /* Search in the thunks to find the real name of the extension */
 765   ext.name = lpszProc;
 766   ext_ret = bsearch(&ext, extension_registry, extension_registry_size,
 767                     sizeof(OpenGL_extension), compar);
 768   if (!ext_ret)
 769   {
 770       WARN("Extension '%s' not defined in opengl32.dll's function table!\n", lpszProc);
 771       return NULL;
 772   }
 773
 774   func_ptr = (void **)&funcs->ext + (ext_ret - extension_registry);
 775   if (!*func_ptr)
 776   {
 777     /* Check if the GL extension required by the function is available */
 778     if(!is_extension_supported(ext_ret->extension)) {
 779         WARN("Extension '%s' required by function '%s' not supported!\n", ext_ret->extension, lpszProc);
 780     }
 781
 782     local_func = context->funcs->wgl.p_wglGetProcAddress( ext_ret->name );
 783
 784     /* After that, look at the extensions defined in the Linux OpenGL library */
 785     if (local_func == NULL) {
 786       char buf[256];
 787       void *ret = NULL;
 788
 789       /* Remove the last 3 letters (EXT, ARB, ...).
 790
 791          I know that some extensions have more than 3 letters (MESA, NV,
 792          INTEL, ...), but this is only a stop-gap measure to fix buggy
 793          OpenGL drivers (moreover, it is only useful for old 1.0 apps
 794          that query the glBindTextureEXT extension).
 795       */
 796       memcpy(buf, ext_ret->name, strlen(ext_ret->name) - 3);
 797       buf[strlen(ext_ret->name) - 3] = '\0';
 798       TRACE("Extension not found in the Linux OpenGL library, checking against libGL bug with %s..\n", buf);
 799
 800       ret = GetProcAddress(opengl32_handle, buf);
 801       if (ret != NULL) {
 802         TRACE("Found function in main OpenGL library (%p)!\n", ret);
 803       } else {
 804         WARN("Did not find function %s (%s) in your OpenGL library!\n", lpszProc, ext_ret->name);
 805       }
 806
 807       return ret;
 808     }
 809     *func_ptr = local_func;
 810   }
 811
 812   TRACE("returning function (%p)\n", ext_ret->func);
 813   return ext_ret->func;
 814 }
 815
 816 /***********************************************************************
 817  *              wglRealizeLayerPalette (OPENGL32.@)
 818  */
 819 BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
 820                                    int iLayerPlane,
 821                                    BOOL bRealize) {
 822   FIXME("()\n");
 823
 824   return FALSE;
 825 }
 826
 827 /***********************************************************************
 828  *              wglSetLayerPaletteEntries (OPENGL32.@)
 829  */
 830 int WINAPI wglSetLayerPaletteEntries(HDC hdc,
 831                                      int iLayerPlane,
 832                                      int iStart,
 833                                      int cEntries,
 834                                      const COLORREF *pcr) {
 835   FIXME("(): stub!\n");
 836
 837   return 0;
 838 }
 839
 840 /***********************************************************************
 841  *              wglSwapLayerBuffers (OPENGL32.@)
 842  */
 843 BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
 844                                 UINT fuPlanes) {
 845   TRACE("(%p, %08x)\n", hdc, fuPlanes);
 846
 847   if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
 848     if (!wglSwapBuffers( hdc )) return FALSE;
 849     fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
 850   }
 851
 852   if (fuPlanes) {
 853     WARN("Following layers unhandled: %08x\n", fuPlanes);
 854   }
 855
 856   return TRUE;
 857 }
 858
 859 /***********************************************************************
 860  *              wglAllocateMemoryNV
 861  *
 862  * Provided by the WGL_NV_vertex_array_range extension.
 863  */
 864 void * WINAPI wglAllocateMemoryNV( GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority )
 865 {
 866     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
 867
 868     if (!funcs->ext.p_wglAllocateMemoryNV) return NULL;
 869     return funcs->ext.p_wglAllocateMemoryNV( size, readfreq, writefreq, priority );
 870 }
 871
 872 /***********************************************************************
 873  *              wglFreeMemoryNV
 874  *
 875  * Provided by the WGL_NV_vertex_array_range extension.
 876  */
 877 void WINAPI wglFreeMemoryNV( void *pointer )
 878 {
 879     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
 880
 881     if (funcs->ext.p_wglFreeMemoryNV) funcs->ext.p_wglFreeMemoryNV( pointer );
 882 }
 883
 884 /***********************************************************************
 885  *              wglBindTexImageARB
 886  *
 887  * Provided by the WGL_ARB_render_texture extension.
 888  */
 889 BOOL WINAPI wglBindTexImageARB( HPBUFFERARB handle, int buffer )
 890 {
 891     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
 892     BOOL ret;
 893
 894     if (!ptr) return FALSE;
 895     ret = ptr->funcs->ext.p_wglBindTexImageARB( ptr->u.pbuffer, buffer );
 896     release_handle_ptr( ptr );
 897     return ret;
 898 }
 899
 900 /***********************************************************************
 901  *              wglReleaseTexImageARB
 902  *
 903  * Provided by the WGL_ARB_render_texture extension.
 904  */
 905 BOOL WINAPI wglReleaseTexImageARB( HPBUFFERARB handle, int buffer )
 906 {
 907     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
 908     BOOL ret;
 909
 910     if (!ptr) return FALSE;
 911     ret = ptr->funcs->ext.p_wglReleaseTexImageARB( ptr->u.pbuffer, buffer );
 912     release_handle_ptr( ptr );
 913     return ret;
 914 }
 915
 916 /***********************************************************************
 917  *              wglSetPbufferAttribARB
 918  *
 919  * Provided by the WGL_ARB_render_texture extension.
 920  */
 921 BOOL WINAPI wglSetPbufferAttribARB( HPBUFFERARB handle, const int *attribs )
 922 {
 923     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
 924     BOOL ret;
 925
 926     if (!ptr) return FALSE;
 927     ret = ptr->funcs->ext.p_wglSetPbufferAttribARB( ptr->u.pbuffer, attribs );
 928     release_handle_ptr( ptr );
 929     return ret;
 930 }
 931
 932 /***********************************************************************
 933  *              wglChoosePixelFormatARB
 934  *
 935  * Provided by the WGL_ARB_pixel_format extension.
 936  */
 937 BOOL WINAPI wglChoosePixelFormatARB( HDC hdc, const int *iattribs, const FLOAT *fattribs,
 938                                      UINT max, int *formats, UINT *count )
 939 {
 940     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
 941
 942     if (!funcs || !funcs->ext.p_wglChoosePixelFormatARB) return FALSE;
 943     return funcs->ext.p_wglChoosePixelFormatARB( hdc, iattribs, fattribs, max, formats, count );
 944 }
 945
 946 /***********************************************************************
 947  *              wglGetPixelFormatAttribivARB
 948  *
 949  * Provided by the WGL_ARB_pixel_format extension.
 950  */
 951 BOOL WINAPI wglGetPixelFormatAttribivARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
 952                                           int *values )
 953 {
 954     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
 955
 956     if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribivARB) return FALSE;
 957     return funcs->ext.p_wglGetPixelFormatAttribivARB( hdc, format, layer, count, attribs, values );
 958 }
 959
 960 /***********************************************************************
 961  *              wglGetPixelFormatAttribfvARB
 962  *
 963  * Provided by the WGL_ARB_pixel_format extension.
 964  */
 965 BOOL WINAPI wglGetPixelFormatAttribfvARB( HDC hdc, int format, int layer, UINT count, const int *attribs,
 966                                           FLOAT *values )
 967 {
 968     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
 969
 970     if (!funcs || !funcs->ext.p_wglGetPixelFormatAttribfvARB) return FALSE;
 971     return funcs->ext.p_wglGetPixelFormatAttribfvARB( hdc, format, layer, count, attribs, values );
 972 }
 973
 974 /***********************************************************************
 975  *              wglCreatePbufferARB
 976  *
 977  * Provided by the WGL_ARB_pbuffer extension.
 978  */
 979 HPBUFFERARB WINAPI wglCreatePbufferARB( HDC hdc, int format, int width, int height, const int *attribs )
 980 {
 981     HPBUFFERARB ret = 0;
 982     struct wgl_pbuffer *pbuffer;
 983     struct opengl_funcs *funcs = get_dc_funcs( hdc );
 984
 985     if (!funcs || !funcs->ext.p_wglCreatePbufferARB) return 0;
 986     if (!(pbuffer = funcs->ext.p_wglCreatePbufferARB( hdc, format, width, height, attribs ))) return 0;
 987     ret = alloc_handle( HANDLE_PBUFFER, funcs, pbuffer );
 988     if (!ret) funcs->ext.p_wglDestroyPbufferARB( pbuffer );
 989     return ret;
 990 }
 991
 992 /***********************************************************************
 993  *              wglGetPbufferDCARB
 994  *
 995  * Provided by the WGL_ARB_pbuffer extension.
 996  */
 997 HDC WINAPI wglGetPbufferDCARB( HPBUFFERARB handle )
 998 {
 999     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1000     HDC ret;
1001
1002     if (!ptr) return 0;
1003     ret = ptr->funcs->ext.p_wglGetPbufferDCARB( ptr->u.pbuffer );
1004     release_handle_ptr( ptr );
1005     return ret;
1006 }
1007
1008 /***********************************************************************
1009  *              wglReleasePbufferDCARB
1010  *
1011  * Provided by the WGL_ARB_pbuffer extension.
1012  */
1013 int WINAPI wglReleasePbufferDCARB( HPBUFFERARB handle, HDC hdc )
1014 {
1015     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1016     BOOL ret;
1017
1018     if (!ptr) return FALSE;
1019     ret = ptr->funcs->ext.p_wglReleasePbufferDCARB( ptr->u.pbuffer, hdc );
1020     release_handle_ptr( ptr );
1021     return ret;
1022 }
1023
1024 /***********************************************************************
1025  *              wglDestroyPbufferARB
1026  *
1027  * Provided by the WGL_ARB_pbuffer extension.
1028  */
1029 BOOL WINAPI wglDestroyPbufferARB( HPBUFFERARB handle )
1030 {
1031     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1032
1033     if (!ptr) return FALSE;
1034     ptr->funcs->ext.p_wglDestroyPbufferARB( ptr->u.pbuffer );
1035     free_handle_ptr( ptr );
1036     return TRUE;
1037 }
1038
1039 /***********************************************************************
1040  *              wglQueryPbufferARB
1041  *
1042  * Provided by the WGL_ARB_pbuffer extension.
1043  */
1044 BOOL WINAPI wglQueryPbufferARB( HPBUFFERARB handle, int attrib, int *value )
1045 {
1046     struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1047     BOOL ret;
1048
1049     if (!ptr) return FALSE;
1050     ret = ptr->funcs->ext.p_wglQueryPbufferARB( ptr->u.pbuffer, attrib, value );
1051     release_handle_ptr( ptr );
1052     return ret;
1053 }
1054
1055 /***********************************************************************
1056  *              wglGetExtensionsStringARB
1057  *
1058  * Provided by the WGL_ARB_extensions_string extension.
1059  */
1060 const char * WINAPI wglGetExtensionsStringARB( HDC hdc )
1061 {
1062     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1063
1064     if (!funcs || !funcs->ext.p_wglGetExtensionsStringARB) return NULL;
1065     return (const char *)funcs->ext.p_wglGetExtensionsStringARB( hdc );
1066 }
1067
1068 /***********************************************************************
1069  *              wglGetExtensionsStringEXT
1070  *
1071  * Provided by the WGL_EXT_extensions_string extension.
1072  */
1073 const char * WINAPI wglGetExtensionsStringEXT(void)
1074 {
1075     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1076
1077     if (!funcs->ext.p_wglGetExtensionsStringEXT) return NULL;
1078     return (const char *)funcs->ext.p_wglGetExtensionsStringEXT();
1079 }
1080
1081 /***********************************************************************
1082  *              wglSwapIntervalEXT
1083  *
1084  * Provided by the WGL_EXT_swap_control extension.
1085  */
1086 BOOL WINAPI wglSwapIntervalEXT( int interval )
1087 {
1088     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1089
1090     if (!funcs->ext.p_wglSwapIntervalEXT) return FALSE;
1091     return funcs->ext.p_wglSwapIntervalEXT( interval );
1092 }
1093
1094 /***********************************************************************
1095  *              wglGetSwapIntervalEXT
1096  *
1097  * Provided by the WGL_EXT_swap_control extension.
1098  */
1099 int WINAPI wglGetSwapIntervalEXT(void)
1100 {
1101     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1102
1103     if (!funcs->ext.p_wglGetSwapIntervalEXT) return FALSE;
1104     return funcs->ext.p_wglGetSwapIntervalEXT();
1105 }
1106
1107 /***********************************************************************
1108  *              wglSetPixelFormatWINE
1109  *
1110  * Provided by the WGL_WINE_pixel_format_passthrough extension.
1111  */
1112 BOOL WINAPI wglSetPixelFormatWINE( HDC hdc, int format )
1113 {
1114     const struct opengl_funcs *funcs = get_dc_funcs( hdc );
1115
1116     if (!funcs || !funcs->ext.p_wglSetPixelFormatWINE) return FALSE;
1117     return funcs->ext.p_wglSetPixelFormatWINE( hdc, format );
1118 }
1119
1120 /***********************************************************************
1121  *              wglUseFontBitmaps_common
1122  */
1123 static BOOL wglUseFontBitmaps_common( HDC hdc, DWORD first, DWORD count, DWORD listBase, BOOL unicode )
1124 {
1125     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1126      GLYPHMETRICS gm;
1127      unsigned int glyph, size = 0;
1128      void *bitmap = NULL, *gl_bitmap = NULL;
1129      int org_alignment;
1130      BOOL ret = TRUE;
1131
1132      funcs->gl.p_glGetIntegerv(GL_UNPACK_ALIGNMENT, &org_alignment);
1133      funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
1134
1135      for (glyph = first; glyph < first + count; glyph++) {
1136          static const MAT2 identity = { {0,1},{0,0},{0,0},{0,1} };
1137          unsigned int needed_size, height, width, width_int;
1138
1139          if (unicode)
1140              needed_size = GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1141          else
1142              needed_size = GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1143
1144          TRACE("Glyph: %3d / List: %d size %d\n", glyph, listBase, needed_size);
1145          if (needed_size == GDI_ERROR) {
1146              ret = FALSE;
1147              break;
1148          }
1149
1150          if (needed_size > size) {
1151              size = needed_size;
1152              HeapFree(GetProcessHeap(), 0, bitmap);
1153              HeapFree(GetProcessHeap(), 0, gl_bitmap);
1154              bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1155              gl_bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1156          }
1157          if (unicode)
1158              ret = (GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, size, bitmap, &identity) != GDI_ERROR);
1159          else
1160              ret = (GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, size, bitmap, &identity) != GDI_ERROR);
1161          if (!ret) break;
1162
1163          if (TRACE_ON(wgl)) {
1164              unsigned int bitmask;
1165              unsigned char *bitmap_ = bitmap;
1166
1167              TRACE("  - bbox: %d x %d\n", gm.gmBlackBoxX, gm.gmBlackBoxY);
1168              TRACE("  - origin: (%d, %d)\n", gm.gmptGlyphOrigin.x, gm.gmptGlyphOrigin.y);
1169              TRACE("  - increment: %d - %d\n", gm.gmCellIncX, gm.gmCellIncY);
1170              if (needed_size != 0) {
1171                  TRACE("  - bitmap:\n");
1172                  for (height = 0; height < gm.gmBlackBoxY; height++) {
1173                      TRACE("      ");
1174                      for (width = 0, bitmask = 0x80; width < gm.gmBlackBoxX; width++, bitmask >>= 1) {
1175                          if (bitmask == 0) {
1176                              bitmap_ += 1;
1177                              bitmask = 0x80;
1178                          }
1179                          if (*bitmap_ & bitmask)
1180                              TRACE("*");
1181                          else
1182                              TRACE(" ");
1183                      }
1184                      bitmap_ += (4 - ((UINT_PTR)bitmap_ & 0x03));
1185                      TRACE("\n");
1186                  }
1187              }
1188          }
1189
1190          /* In OpenGL, the bitmap is drawn from the bottom to the top... So we need to invert the
1191          * glyph for it to be drawn properly.
1192          */
1193          if (needed_size != 0) {
1194              width_int = (gm.gmBlackBoxX + 31) / 32;
1195              for (height = 0; height < gm.gmBlackBoxY; height++) {
1196                  for (width = 0; width < width_int; width++) {
1197                      ((int *) gl_bitmap)[(gm.gmBlackBoxY - height - 1) * width_int + width] =
1198                      ((int *) bitmap)[height * width_int + width];
1199                  }
1200              }
1201          }
1202
1203          funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1204          if (needed_size != 0) {
1205              funcs->gl.p_glBitmap(gm.gmBlackBoxX, gm.gmBlackBoxY,
1206                      0 - gm.gmptGlyphOrigin.x, (int) gm.gmBlackBoxY - gm.gmptGlyphOrigin.y,
1207                      gm.gmCellIncX, gm.gmCellIncY,
1208                      gl_bitmap);
1209          } else {
1210              /* This is the case of 'empty' glyphs like the space character */
1211              funcs->gl.p_glBitmap(0, 0, 0, 0, gm.gmCellIncX, gm.gmCellIncY, NULL);
1212          }
1213          funcs->gl.p_glEndList();
1214      }
1215
1216      funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, org_alignment);
1217      HeapFree(GetProcessHeap(), 0, bitmap);
1218      HeapFree(GetProcessHeap(), 0, gl_bitmap);
1219      return ret;
1220 }
1221
1222 /***********************************************************************
1223  *              wglUseFontBitmapsA (OPENGL32.@)
1224  */
1225 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1226 {
1227     return wglUseFontBitmaps_common( hdc, first, count, listBase, FALSE );
1228 }
1229
1230 /***********************************************************************
1231  *              wglUseFontBitmapsW (OPENGL32.@)
1232  */
1233 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1234 {
1235     return wglUseFontBitmaps_common( hdc, first, count, listBase, TRUE );
1236 }
1237
1238 /* FIXME: should probably have a glu.h header */
1239
1240 typedef struct GLUtesselator GLUtesselator;
1241 typedef void (WINAPI *_GLUfuncptr)(void);
1242
1243 #define GLU_TESS_BEGIN  100100
1244 #define GLU_TESS_VERTEX 100101
1245 #define GLU_TESS_END    100102
1246
1247 static GLUtesselator * (WINAPI *pgluNewTess)(void);
1248 static void (WINAPI *pgluDeleteTess)(GLUtesselator *tess);
1249 static void (WINAPI *pgluTessBeginPolygon)(GLUtesselator *tess, void *polygon_data);
1250 static void (WINAPI *pgluTessEndPolygon)(GLUtesselator *tess);
1251 static void (WINAPI *pgluTessCallback)(GLUtesselator *tess, GLenum which, _GLUfuncptr fn);
1252 static void (WINAPI *pgluTessBeginContour)(GLUtesselator *tess);
1253 static void (WINAPI *pgluTessEndContour)(GLUtesselator *tess);
1254 static void (WINAPI *pgluTessVertex)(GLUtesselator *tess, GLdouble *location, GLvoid* data);
1255
1256 static HMODULE load_libglu(void)
1257 {
1258     static const WCHAR glu32W[] = {'g','l','u','3','2','.','d','l','l',0};
1259     static int already_loaded;
1260     static HMODULE module;
1261
1262     if (already_loaded) return module;
1263     already_loaded = 1;
1264
1265     TRACE("Trying to load GLU library\n");
1266     module = LoadLibraryW( glu32W );
1267     if (!module)
1268     {
1269         WARN("Failed to load glu32\n");
1270         return NULL;
1271     }
1272 #define LOAD_FUNCPTR(f) p##f = (void *)GetProcAddress( module, #f )
1273     LOAD_FUNCPTR(gluNewTess);
1274     LOAD_FUNCPTR(gluDeleteTess);
1275     LOAD_FUNCPTR(gluTessBeginContour);
1276     LOAD_FUNCPTR(gluTessBeginPolygon);
1277     LOAD_FUNCPTR(gluTessCallback);
1278     LOAD_FUNCPTR(gluTessEndContour);
1279     LOAD_FUNCPTR(gluTessEndPolygon);
1280     LOAD_FUNCPTR(gluTessVertex);
1281 #undef LOAD_FUNCPTR
1282     return module;
1283 }
1284
1285 static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
1286 {
1287     vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
1288     vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
1289     vertex[2] = 0.0;
1290 }
1291
1292 static void WINAPI tess_callback_vertex(GLvoid *vertex)
1293 {
1294     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1295     GLdouble *dbl = vertex;
1296     TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
1297     funcs->gl.p_glVertex3dv(vertex);
1298 }
1299
1300 static void WINAPI tess_callback_begin(GLenum which)
1301 {
1302     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1303     TRACE("%d\n", which);
1304     funcs->gl.p_glBegin(which);
1305 }
1306
1307 static void WINAPI tess_callback_end(void)
1308 {
1309     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1310     TRACE("\n");
1311     funcs->gl.p_glEnd();
1312 }
1313
1314 /***********************************************************************
1315  *              wglUseFontOutlines_common
1316  */
1317 static BOOL wglUseFontOutlines_common(HDC hdc,
1318                                       DWORD first,
1319                                       DWORD count,
1320                                       DWORD listBase,
1321                                       FLOAT deviation,
1322                                       FLOAT extrusion,
1323                                       int format,
1324                                       LPGLYPHMETRICSFLOAT lpgmf,
1325                                       BOOL unicode)
1326 {
1327     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1328     UINT glyph;
1329     const MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
1330     GLUtesselator *tess;
1331     LOGFONTW lf;
1332     HFONT old_font, unscaled_font;
1333     UINT em_size = 1024;
1334     RECT rc;
1335
1336     TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
1337           listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
1338
1339     if (!load_libglu())
1340     {
1341         ERR("glu32 is required for this function but isn't available\n");
1342         return FALSE;
1343     }
1344
1345     tess = pgluNewTess();
1346     if(!tess) return FALSE;
1347     pgluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)tess_callback_vertex);
1348     pgluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)tess_callback_begin);
1349     pgluTessCallback(tess, GLU_TESS_END, tess_callback_end);
1350
1351     GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
1352     rc.left = rc.right = rc.bottom = 0;
1353     rc.top = em_size;
1354     DPtoLP(hdc, (POINT*)&rc, 2);
1355     lf.lfHeight = -abs(rc.top - rc.bottom);
1356     lf.lfOrientation = lf.lfEscapement = 0;
1357     unscaled_font = CreateFontIndirectW(&lf);
1358     old_font = SelectObject(hdc, unscaled_font);
1359
1360     for (glyph = first; glyph < first + count; glyph++)
1361     {
1362         DWORD needed;
1363         GLYPHMETRICS gm;
1364         BYTE *buf;
1365         TTPOLYGONHEADER *pph;
1366         TTPOLYCURVE *ppc;
1367         GLdouble *vertices;
1368
1369         if(unicode)
1370             needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1371         else
1372             needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1373
1374         if(needed == GDI_ERROR)
1375             goto error;
1376
1377         buf = HeapAlloc(GetProcessHeap(), 0, needed);
1378         vertices = HeapAlloc(GetProcessHeap(), 0, needed / sizeof(POINTFX) * 3 * sizeof(GLdouble));
1379
1380         if(unicode)
1381             GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1382         else
1383             GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1384
1385         TRACE("glyph %d\n", glyph);
1386
1387         if(lpgmf)
1388         {
1389             lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
1390             lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
1391             lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
1392             lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
1393             lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
1394             lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
1395
1396             TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
1397                   lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
1398             lpgmf++;
1399         }
1400
1401         funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1402         pgluTessBeginPolygon(tess, NULL);
1403
1404         pph = (TTPOLYGONHEADER*)buf;
1405         while((BYTE*)pph < buf + needed)
1406         {
1407             TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
1408
1409             pgluTessBeginContour(tess);
1410
1411             fixed_to_double(pph->pfxStart, em_size, vertices);
1412             pgluTessVertex(tess, vertices, vertices);
1413             vertices += 3;
1414
1415             ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
1416             while((char*)ppc < (char*)pph + pph->cb)
1417             {
1418                 int i;
1419
1420                 switch(ppc->wType) {
1421                 case TT_PRIM_LINE:
1422                     for(i = 0; i < ppc->cpfx; i++)
1423                     {
1424                         TRACE("\t\tline to %d, %d\n", ppc->apfx[i].x.value, ppc->apfx[i].y.value);
1425                         fixed_to_double(ppc->apfx[i], em_size, vertices);
1426                         pgluTessVertex(tess, vertices, vertices);
1427                         vertices += 3;
1428                     }
1429                     break;
1430
1431                 case TT_PRIM_QSPLINE:
1432                     for(i = 0; i < ppc->cpfx/2; i++)
1433                     {
1434                         /* FIXME: just connecting the control points for now */
1435                         TRACE("\t\tcurve  %d,%d %d,%d\n",
1436                               ppc->apfx[i * 2].x.value,     ppc->apfx[i * 3].y.value,
1437                               ppc->apfx[i * 2 + 1].x.value, ppc->apfx[i * 3 + 1].y.value);
1438                         fixed_to_double(ppc->apfx[i * 2], em_size, vertices);
1439                         pgluTessVertex(tess, vertices, vertices);
1440                         vertices += 3;
1441                         fixed_to_double(ppc->apfx[i * 2 + 1], em_size, vertices);
1442                         pgluTessVertex(tess, vertices, vertices);
1443                         vertices += 3;
1444                     }
1445                     break;
1446                 default:
1447                     ERR("\t\tcurve type = %d\n", ppc->wType);
1448                     pgluTessEndContour(tess);
1449                     goto error_in_list;
1450                 }
1451
1452                 ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
1453                                      (ppc->cpfx - 1) * sizeof(POINTFX));
1454             }
1455             pgluTessEndContour(tess);
1456             pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
1457         }
1458
1459 error_in_list:
1460         pgluTessEndPolygon(tess);
1461         funcs->gl.p_glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
1462         funcs->gl.p_glEndList();
1463         HeapFree(GetProcessHeap(), 0, buf);
1464         HeapFree(GetProcessHeap(), 0, vertices);
1465     }
1466
1467  error:
1468     DeleteObject(SelectObject(hdc, old_font));
1469     pgluDeleteTess(tess);
1470     return TRUE;
1471
1472 }
1473
1474 /***********************************************************************
1475  *              wglUseFontOutlinesA (OPENGL32.@)
1476  */
1477 BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
1478                                 DWORD first,
1479                                 DWORD count,
1480                                 DWORD listBase,
1481                                 FLOAT deviation,
1482                                 FLOAT extrusion,
1483                                 int format,
1484                                 LPGLYPHMETRICSFLOAT lpgmf)
1485 {
1486     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
1487 }
1488
1489 /***********************************************************************
1490  *              wglUseFontOutlinesW (OPENGL32.@)
1491  */
1492 BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
1493                                 DWORD first,
1494                                 DWORD count,
1495                                 DWORD listBase,
1496                                 FLOAT deviation,
1497                                 FLOAT extrusion,
1498                                 int format,
1499                                 LPGLYPHMETRICSFLOAT lpgmf)
1500 {
1501     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
1502 }
1503
1504 /***********************************************************************
1505  *              glDebugEntry (OPENGL32.@)
1506  */
1507 GLint WINAPI wine_glDebugEntry( GLint unknown1, GLint unknown2 )
1508 {
1509     return 0;
1510 }
1511
1512 /* build the extension string by filtering out the disabled extensions */
1513 static GLubyte *filter_extensions( const char *extensions )
1514 {
1515     static const char *disabled;
1516     char *p, *str;
1517     const char *end;
1518
1519     TRACE( "GL_EXTENSIONS:\n" );
1520
1521     if (!extensions) extensions = "";
1522
1523     if (!disabled)
1524     {
1525         HKEY hkey;
1526         DWORD size;
1527
1528         str = NULL;
1529         /* @@ Wine registry key: HKCU\Software\Wine\OpenGL */
1530         if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey ))
1531         {
1532             if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, NULL, &size ))
1533             {
1534                 str = HeapAlloc( GetProcessHeap(), 0, size );
1535                 if (RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (BYTE *)str, &size )) *str = 0;
1536             }
1537             RegCloseKey( hkey );
1538         }
1539         if (str)
1540         {
1541             if (InterlockedCompareExchangePointer( (void **)&disabled, str, NULL ))
1542                 HeapFree( GetProcessHeap(), 0, str );
1543         }
1544         else disabled = "";
1545     }
1546
1547     if (!disabled[0]) return NULL;
1548     if ((str = HeapAlloc( GetProcessHeap(), 0, strlen(extensions) + 2 )))
1549     {
1550         p = str;
1551         for (;;)
1552         {
1553             while (*extensions == ' ') extensions++;
1554             if (!*extensions) break;
1555             if (!(end = strchr( extensions, ' ' ))) end = extensions + strlen( extensions );
1556             memcpy( p, extensions, end - extensions );
1557             p[end - extensions] = 0;
1558             if (!has_extension( disabled, p ))
1559             {
1560                 TRACE("++ %s\n", p );
1561                 p += end - extensions;
1562                 *p++ = ' ';
1563             }
1564             else TRACE("-- %s (disabled by config)\n", p );
1565             extensions = end;
1566         }
1567         *p = 0;
1568     }
1569     return (GLubyte *)str;
1570 }
1571
1572 /***********************************************************************
1573  *              glGetString (OPENGL32.@)
1574  */
1575 const GLubyte * WINAPI wine_glGetString( GLenum name )
1576 {
1577     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1578     const GLubyte *ret = funcs->gl.p_glGetString( name );
1579
1580     if (name == GL_EXTENSIONS && ret)
1581     {
1582         struct wgl_handle *ptr = get_current_context_ptr();
1583         if (ptr->u.context->extensions ||
1584             ((ptr->u.context->extensions = filter_extensions( (const char *)ret ))))
1585             ret = ptr->u.context->extensions;
1586     }
1587     return ret;
1588 }
1589
1590 /***********************************************************************
1591  *           OpenGL initialisation routine
1592  */
1593 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
1594 {
1595     switch(reason)
1596     {
1597     case DLL_PROCESS_ATTACH:
1598         opengl32_handle = hinst;
1599         DisableThreadLibraryCalls(hinst);
1600         NtCurrentTeb()->glTable = &null_opengl_funcs;
1601         break;
1602     case DLL_THREAD_ATTACH:
1603         NtCurrentTeb()->glTable = &null_opengl_funcs;
1604         break;
1605     }
1606     return TRUE;
1607 }