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 "windef.h"
  29 #include "winbase.h"
  30 #include "winuser.h"
  31 #include "winreg.h"
  32 #include "wingdi.h"
  33 #include "winternl.h"
  34 #include "winnt.h"
  35
  36 #include "opengl_ext.h"
  37 #ifdef HAVE_GL_GLU_H
  38 #undef far
  39 #undef near
  40 #include <GL/glu.h>
  41 #endif
  42 #include "wine/library.h"
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
  46 WINE_DECLARE_DEBUG_CHANNEL(opengl);
  47
  48 typedef struct wine_wgl_s {
  49     PROC WINAPI  (*p_wglGetProcAddress)(LPCSTR  lpszProc);
  50
  51     void WINAPI  (*p_wglDisable)(GLenum cap);
  52     void WINAPI  (*p_wglEnable)(GLenum cap);
  53     void WINAPI  (*p_wglGetIntegerv)(GLenum pname, GLint* params);
  54     GLboolean WINAPI (*p_wglIsEnabled)(GLenum cap);
  55     void WINAPI  (*p_wglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
  56     void WINAPI  (*p_wglViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
  57 } wine_wgl_t;
  58
  59 /** global wgl object */
  60 static wine_wgl_t wine_wgl;
  61
  62 /* x11drv GDI escapes */
  63 #define X11DRV_ESCAPE 6789
  64 enum x11drv_escape_codes
  65 {
  66     X11DRV_GET_DISPLAY,         /* get X11 display for a DC */
  67     X11DRV_GET_DRAWABLE,        /* get current drawable for a DC */
  68     X11DRV_GET_FONT,            /* get current X font for a DC */
  69     X11DRV_SET_DRAWABLE,        /* set current drawable for a DC */
  70     X11DRV_START_EXPOSURES,     /* start graphics exposures */
  71     X11DRV_END_EXPOSURES,       /* end graphics exposures */
  72     X11DRV_GET_DCE,             /* get the DCE pointer */
  73     X11DRV_SET_DCE,             /* set the DCE pointer */
  74     X11DRV_GET_GLX_DRAWABLE,    /* get current glx drawable for a DC */
  75     X11DRV_SYNC_PIXMAP          /* sync the dibsection to its pixmap */
  76 };
  77
  78 void (*wine_tsx11_lock_ptr)(void) = NULL;
  79 void (*wine_tsx11_unlock_ptr)(void) = NULL;
  80
  81 static HMODULE opengl32_handle;
  82
  83 static char  internal_gl_disabled_extensions[512];
  84 static char* internal_gl_extensions = NULL;
  85
  86 typedef struct wine_glcontext {
  87   HDC hdc;
  88   XVisualInfo *vis;
  89   GLXFBConfig fb_conf;
  90   GLXContext ctx;
  91   BOOL do_escape;
  92   /* ... more stuff here */
  93 } Wine_GLContext;
  94
  95 void enter_gl(void)
  96 {
  97     Wine_GLContext *curctx = (Wine_GLContext *) NtCurrentTeb()->glContext;
  98
  99     if (curctx && curctx->do_escape)
 100     {
 101         enum x11drv_escape_codes escape = X11DRV_SYNC_PIXMAP;
 102         ExtEscape(curctx->hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape, 0, NULL);
 103     }
 104
 105     wine_tsx11_lock_ptr();
 106     return;
 107 }
 108
 109 const GLubyte * WINAPI wine_glGetString( GLenum name );
 110
 111 /***********************************************************************
 112  *              wglCreateLayerContext (OPENGL32.@)
 113  */
 114 HGLRC WINAPI wglCreateLayerContext(HDC hdc,
 115                                    int iLayerPlane) {
 116   TRACE("(%p,%d)\n", hdc, iLayerPlane);
 117
 118   if (iLayerPlane == 0) {
 119       return wglCreateContext(hdc);
 120   }
 121   FIXME(" no handler for layer %d\n", iLayerPlane);
 122
 123   return NULL;
 124 }
 125
 126 /***********************************************************************
 127  *              wglCopyContext (OPENGL32.@)
 128  */
 129 BOOL WINAPI wglCopyContext(HGLRC hglrcSrc,
 130                            HGLRC hglrcDst,
 131                            UINT mask) {
 132   FIXME("(%p,%p,%d)\n", hglrcSrc, hglrcDst, mask);
 133
 134   return FALSE;
 135 }
 136
 137 /***********************************************************************
 138  *              wglDescribeLayerPlane (OPENGL32.@)
 139  */
 140 BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
 141                                   int iPixelFormat,
 142                                   int iLayerPlane,
 143                                   UINT nBytes,
 144                                   LPLAYERPLANEDESCRIPTOR plpd) {
 145   FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);
 146
 147   return FALSE;
 148 }
 149
 150 /***********************************************************************
 151  *              wglGetLayerPaletteEntries (OPENGL32.@)
 152  */
 153 int WINAPI wglGetLayerPaletteEntries(HDC hdc,
 154                                      int iLayerPlane,
 155                                      int iStart,
 156                                      int cEntries,
 157                                      const COLORREF *pcr) {
 158   FIXME("(): stub !\n");
 159
 160   return 0;
 161 }
 162
 163 static int compar(const void *elt_a, const void *elt_b) {
 164   return strcmp(((const OpenGL_extension *) elt_a)->name,
 165                 ((const OpenGL_extension *) elt_b)->name);
 166 }
 167
 168 /* Check if a GL extension is supported */
 169 static BOOL is_extension_supported(const char* extension)
 170 {
 171     const char *gl_ext_string = (const char*)wine_glGetString(GL_EXTENSIONS);
 172
 173     TRACE("Checking for extension '%s'\n", extension);
 174
 175     if(!gl_ext_string) {
 176         ERR("No OpenGL extensions found, check if your OpenGL setup is correct!\n");
 177         return FALSE;
 178     }
 179
 180     /* We use the GetProcAddress function from the display driver to retrieve function pointers
 181      * for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
 182      * using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
 183      * require the function to return NULL when a extension isn't found. For this reason we check
 184      * if the OpenGL extension required for the function we are looking up is supported. */
 185
 186     /* Check if the extension is part of the GL extension string to see if it is supported. */
 187     if(strstr(gl_ext_string, extension) != NULL)
 188         return TRUE;
 189
 190     /* In general an OpenGL function starts as an ARB/EXT extension and at some stage
 191      * it becomes part of the core OpenGL library and can be reached without the ARB/EXT
 192      * suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
 193      * Check if we are searching for a core GL function */
 194     if(strncmp(extension, "GL_VERSION_", 11) == 0)
 195     {
 196         const GLubyte *gl_version = glGetString(GL_VERSION);
 197         const char *version = extension + 11; /* Move past 'GL_VERSION_' */
 198
 199         if(!gl_version) {
 200             ERR("Error no OpenGL version found,\n");
 201             return FALSE;
 202         }
 203
 204         /* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
 205          * The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
 206         if( (gl_version[0] >= version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2])) ) {
 207             return TRUE;
 208         }
 209         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]);
 210     }
 211
 212     return FALSE;
 213 }
 214
 215 /***********************************************************************
 216  *              wglGetProcAddress (OPENGL32.@)
 217  */
 218 PROC WINAPI wglGetProcAddress(LPCSTR  lpszProc) {
 219   void *local_func;
 220   OpenGL_extension  ext;
 221   const OpenGL_extension *ext_ret;
 222
 223   TRACE("(%s)\n", lpszProc);
 224
 225   if(lpszProc == NULL)
 226     return NULL;
 227
 228   /* First, look if it's not already defined in the 'standard' OpenGL functions */
 229   if ((local_func = GetProcAddress(opengl32_handle, lpszProc)) != NULL) {
 230     TRACE(" found function in 'standard' OpenGL functions (%p)\n", local_func);
 231     return local_func;
 232   }
 233
 234   /* After that, search in the thunks to find the real name of the extension */
 235   ext.name = lpszProc;
 236   ext_ret = (const OpenGL_extension *) bsearch(&ext, extension_registry,
 237                                          extension_registry_size, sizeof(OpenGL_extension), compar);
 238
 239   /* If nothing was found, we are looking for a WGL extension or an unknown GL extension. */
 240   if (ext_ret == NULL) {
 241     /* If the function name starts with a w it is a WGL extension */
 242     if(lpszProc[0] == 'w')
 243       return wine_wgl.p_wglGetProcAddress(lpszProc);
 244
 245     /* We are dealing with an unknown GL extension. */
 246     WARN("Extension '%s' not defined in opengl32.dll's function table!\n", lpszProc);
 247     return NULL;
 248   } else { /* We are looking for an OpenGL extension */
 249
 250     /* Check if the GL extension required by the function is available */
 251     if(!is_extension_supported(ext_ret->extension)) {
 252         WARN("Extension '%s' required by function '%s' not supported!\n", ext_ret->extension, lpszProc);
 253     }
 254
 255     local_func = wine_wgl.p_wglGetProcAddress(ext_ret->name);
 256
 257     /* After that, look at the extensions defined in the Linux OpenGL library */
 258     if (local_func == NULL) {
 259       char buf[256];
 260       void *ret = NULL;
 261
 262       /* Remove the 3 last letters (EXT, ARB, ...).
 263
 264          I know that some extensions have more than 3 letters (MESA, NV,
 265          INTEL, ...), but this is only a stop-gap measure to fix buggy
 266          OpenGL drivers (moreover, it is only useful for old 1.0 apps
 267          that query the glBindTextureEXT extension).
 268       */
 269       memcpy(buf, ext_ret->name, strlen(ext_ret->name) - 3);
 270       buf[strlen(ext_ret->name) - 3] = '\0';
 271       TRACE(" extension not found in the Linux OpenGL library, checking against libGL bug with %s..\n", buf);
 272
 273       ret = GetProcAddress(opengl32_handle, buf);
 274       if (ret != NULL) {
 275         TRACE(" found function in main OpenGL library (%p) !\n", ret);
 276       } else {
 277         WARN("Did not find function %s (%s) in your OpenGL library !\n", lpszProc, ext_ret->name);
 278       }
 279
 280       return ret;
 281     } else {
 282       TRACE(" returning function  (%p)\n", ext_ret->func);
 283       extension_funcs[ext_ret - extension_registry] = local_func;
 284
 285       return ext_ret->func;
 286     }
 287   }
 288 }
 289
 290 /***********************************************************************
 291  *              wglRealizeLayerPalette (OPENGL32.@)
 292  */
 293 BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
 294                                    int iLayerPlane,
 295                                    BOOL bRealize) {
 296   FIXME("()\n");
 297
 298   return FALSE;
 299 }
 300
 301 /***********************************************************************
 302  *              wglSetLayerPaletteEntries (OPENGL32.@)
 303  */
 304 int WINAPI wglSetLayerPaletteEntries(HDC hdc,
 305                                      int iLayerPlane,
 306                                      int iStart,
 307                                      int cEntries,
 308                                      const COLORREF *pcr) {
 309   FIXME("(): stub !\n");
 310
 311   return 0;
 312 }
 313
 314 /***********************************************************************
 315  *              wglSwapLayerBuffers (OPENGL32.@)
 316  */
 317 BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
 318                                 UINT fuPlanes) {
 319   TRACE_(opengl)("(%p, %08x)\n", hdc, fuPlanes);
 320
 321   if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
 322     if (!SwapBuffers(hdc)) return FALSE;
 323     fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
 324   }
 325
 326   if (fuPlanes) {
 327     WARN("Following layers unhandled : %08x\n", fuPlanes);
 328   }
 329
 330   return TRUE;
 331 }
 332
 333 #ifdef HAVE_GL_GLU_H
 334
 335 static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
 336 {
 337     vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
 338     vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
 339     vertex[2] = 0.0;
 340 }
 341
 342 static void tess_callback_vertex(GLvoid *vertex)
 343 {
 344     GLdouble *dbl = vertex;
 345     TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
 346     glVertex3dv(vertex);
 347 }
 348
 349 static void tess_callback_begin(GLenum which)
 350 {
 351     TRACE("%d\n", which);
 352     glBegin(which);
 353 }
 354
 355 static void tess_callback_end(void)
 356 {
 357     TRACE("\n");
 358     glEnd();
 359 }
 360
 361 /***********************************************************************
 362  *              wglUseFontOutlines_common
 363  */
 364 static BOOL WINAPI wglUseFontOutlines_common(HDC hdc,
 365                                       DWORD first,
 366                                       DWORD count,
 367                                       DWORD listBase,
 368                                       FLOAT deviation,
 369                                       FLOAT extrusion,
 370                                       int format,
 371                                       LPGLYPHMETRICSFLOAT lpgmf,
 372                                       BOOL unicode)
 373 {
 374     UINT glyph;
 375     const MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
 376     GLUtesselator *tess;
 377     LOGFONTW lf;
 378     HFONT old_font, unscaled_font;
 379     UINT em_size = 1024;
 380     RECT rc;
 381
 382     TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
 383           listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
 384
 385
 386     ENTER_GL();
 387     tess = gluNewTess();
 388     if(tess)
 389     {
 390         gluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)tess_callback_vertex);
 391         gluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)tess_callback_begin);
 392         gluTessCallback(tess, GLU_TESS_END, tess_callback_end);
 393     }
 394     LEAVE_GL();
 395
 396     if(!tess) return FALSE;
 397
 398     GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
 399     rc.left = rc.right = rc.bottom = 0;
 400     rc.top = em_size;
 401     DPtoLP(hdc, (POINT*)&rc, 2);
 402     lf.lfHeight = -abs(rc.top - rc.bottom);
 403     lf.lfOrientation = lf.lfEscapement = 0;
 404     unscaled_font = CreateFontIndirectW(&lf);
 405     old_font = SelectObject(hdc, unscaled_font);
 406
 407     for (glyph = first; glyph < first + count; glyph++)
 408     {
 409         DWORD needed;
 410         GLYPHMETRICS gm;
 411         BYTE *buf;
 412         TTPOLYGONHEADER *pph;
 413         TTPOLYCURVE *ppc;
 414         GLdouble *vertices;
 415
 416         if(unicode)
 417             needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
 418         else
 419             needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
 420
 421         if(needed == GDI_ERROR)
 422             goto error;
 423
 424         buf = HeapAlloc(GetProcessHeap(), 0, needed);
 425         vertices = HeapAlloc(GetProcessHeap(), 0, needed / sizeof(POINTFX) * 3 * sizeof(GLdouble));
 426
 427         if(unicode)
 428             GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
 429         else
 430             GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
 431
 432         TRACE("glyph %d\n", glyph);
 433
 434         if(lpgmf)
 435         {
 436             lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
 437             lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
 438             lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
 439             lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
 440             lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
 441             lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
 442
 443             TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
 444                   lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
 445             lpgmf++;
 446         }
 447
 448         ENTER_GL();
 449         glNewList(listBase++, GL_COMPILE);
 450         gluTessBeginPolygon(tess, NULL);
 451
 452         pph = (TTPOLYGONHEADER*)buf;
 453         while((BYTE*)pph < buf + needed)
 454         {
 455             TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
 456
 457             gluTessBeginContour(tess);
 458
 459             fixed_to_double(pph->pfxStart, em_size, vertices);
 460             gluTessVertex(tess, vertices, vertices);
 461             vertices += 3;
 462
 463             ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
 464             while((char*)ppc < (char*)pph + pph->cb)
 465             {
 466                 int i;
 467
 468                 switch(ppc->wType) {
 469                 case TT_PRIM_LINE:
 470                     for(i = 0; i < ppc->cpfx; i++)
 471                     {
 472                         TRACE("\t\tline to %d, %d\n", ppc->apfx[i].x.value, ppc->apfx[i].y.value);
 473                         fixed_to_double(ppc->apfx[i], em_size, vertices);
 474                         gluTessVertex(tess, vertices, vertices);
 475                         vertices += 3;
 476                     }
 477                     break;
 478
 479                 case TT_PRIM_QSPLINE:
 480                     for(i = 0; i < ppc->cpfx/2; i++)
 481                     {
 482                         /* FIXME just connecting the control points for now */
 483                         TRACE("\t\tcurve  %d,%d %d,%d\n",
 484                               ppc->apfx[i * 2].x.value,     ppc->apfx[i * 3].y.value,
 485                               ppc->apfx[i * 2 + 1].x.value, ppc->apfx[i * 3 + 1].y.value);
 486                         fixed_to_double(ppc->apfx[i * 2], em_size, vertices);
 487                         gluTessVertex(tess, vertices, vertices);
 488                         vertices += 3;
 489                         fixed_to_double(ppc->apfx[i * 2 + 1], em_size, vertices);
 490                         gluTessVertex(tess, vertices, vertices);
 491                         vertices += 3;
 492                     }
 493                     break;
 494                 default:
 495                     ERR("\t\tcurve type = %d\n", ppc->wType);
 496                     gluTessEndContour(tess);
 497                     goto error_in_list;
 498                 }
 499
 500                 ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
 501                                      (ppc->cpfx - 1) * sizeof(POINTFX));
 502             }
 503             gluTessEndContour(tess);
 504             pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
 505         }
 506
 507 error_in_list:
 508         gluTessEndPolygon(tess);
 509         glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
 510         glEndList();
 511         LEAVE_GL();
 512         HeapFree(GetProcessHeap(), 0, buf);
 513         HeapFree(GetProcessHeap(), 0, vertices);
 514     }
 515
 516  error:
 517     DeleteObject(SelectObject(hdc, old_font));
 518     gluDeleteTess(tess);
 519     return TRUE;
 520
 521 }
 522
 523 #else /* HAVE_GL_GLU_H */
 524
 525 static BOOL WINAPI wglUseFontOutlines_common(HDC hdc,
 526                                       DWORD first,
 527                                       DWORD count,
 528                                       DWORD listBase,
 529                                       FLOAT deviation,
 530                                       FLOAT extrusion,
 531                                       int format,
 532                                       LPGLYPHMETRICSFLOAT lpgmf,
 533                                       BOOL unicode)
 534 {
 535     FIXME("Unable to compile in wglUseFontOutlines support without GL/glu.h\n");
 536     return FALSE;
 537 }
 538
 539 #endif /* HAVE_GL_GLU_H */
 540
 541 /***********************************************************************
 542  *              wglUseFontOutlinesA (OPENGL32.@)
 543  */
 544 BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
 545                                 DWORD first,
 546                                 DWORD count,
 547                                 DWORD listBase,
 548                                 FLOAT deviation,
 549                                 FLOAT extrusion,
 550                                 int format,
 551                                 LPGLYPHMETRICSFLOAT lpgmf)
 552 {
 553     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
 554 }
 555
 556 /***********************************************************************
 557  *              wglUseFontOutlinesW (OPENGL32.@)
 558  */
 559 BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
 560                                 DWORD first,
 561                                 DWORD count,
 562                                 DWORD listBase,
 563                                 FLOAT deviation,
 564                                 FLOAT extrusion,
 565                                 int format,
 566                                 LPGLYPHMETRICSFLOAT lpgmf)
 567 {
 568     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
 569 }
 570
 571 /***********************************************************************
 572  *              glEnable (OPENGL32.@)
 573  */
 574 void WINAPI wine_glEnable( GLenum cap )
 575 {
 576     TRACE("(%d)\n", cap );
 577     wine_wgl.p_wglEnable(cap);
 578 }
 579
 580 /***********************************************************************
 581  *              glIsEnabled (OPENGL32.@)
 582  */
 583 GLboolean WINAPI wine_glIsEnabled( GLenum cap )
 584 {
 585     TRACE("(%d)\n", cap );
 586     return wine_wgl.p_wglIsEnabled(cap);
 587 }
 588
 589 /***********************************************************************
 590  *              glDisable (OPENGL32.@)
 591  */
 592 void WINAPI wine_glDisable( GLenum cap )
 593 {
 594     TRACE("(%d)\n", cap );
 595     wine_wgl.p_wglDisable(cap);
 596 }
 597
 598 /***********************************************************************
 599  *              glScissor (OPENGL32.@)
 600  */
 601 void WINAPI wine_glScissor( GLint x, GLint y, GLsizei width, GLsizei height )
 602 {
 603     TRACE("(%d, %d, %d, %d)\n", x, y, width, height );
 604     wine_wgl.p_wglScissor(x, y, width, height);
 605 }
 606
 607 /***********************************************************************
 608  *              glViewport (OPENGL32.@)
 609  */
 610 void WINAPI wine_glViewport( GLint x, GLint y, GLsizei width, GLsizei height )
 611 {
 612     TRACE("(%d, %d, %d, %d)\n", x, y, width, height );
 613     wine_wgl.p_wglViewport(x, y, width, height);
 614 }
 615
 616 /***********************************************************************
 617  *              glGetString (OPENGL32.@)
 618  */
 619 const GLubyte * WINAPI wine_glGetString( GLenum name )
 620 {
 621   const GLubyte *ret;
 622   const char* GL_Extensions = NULL;
 623
 624   if (GL_EXTENSIONS != name) {
 625     ENTER_GL();
 626     ret = glGetString(name);
 627     LEAVE_GL();
 628     return ret;
 629   }
 630
 631   if (NULL == internal_gl_extensions) {
 632     ENTER_GL();
 633     GL_Extensions = (const char *) glGetString(GL_EXTENSIONS);
 634
 635     if (GL_Extensions)
 636     {
 637       size_t len = strlen(GL_Extensions);
 638       internal_gl_extensions = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len + 2);
 639
 640       TRACE("GL_EXTENSIONS reported:\n");
 641       while (*GL_Extensions != 0x00) {
 642         const char* Start = GL_Extensions;
 643         char        ThisExtn[256];
 644
 645         while (*GL_Extensions != ' ' && *GL_Extensions != 0x00) {
 646           GL_Extensions++;
 647         }
 648         memcpy(ThisExtn, Start, (GL_Extensions - Start));
 649         ThisExtn[GL_Extensions - Start] = 0;
 650         TRACE("- %s:", ThisExtn);
 651
 652         /* test if supported API is disabled by config */
 653         if (NULL == strstr(internal_gl_disabled_extensions, ThisExtn)) {
 654           strcat(internal_gl_extensions, " ");
 655           strcat(internal_gl_extensions, ThisExtn);
 656           TRACE(" active\n");
 657         } else {
 658           TRACE(" deactived (by config)\n");
 659         }
 660
 661         if (*GL_Extensions == ' ') GL_Extensions++;
 662       }
 663     }
 664     LEAVE_GL();
 665   }
 666   return (const GLubyte *) internal_gl_extensions;
 667 }
 668
 669 /***********************************************************************
 670  *              glGetIntegerv (OPENGL32.@)
 671  */
 672 void WINAPI wine_glGetIntegerv( GLenum pname, GLint* params )
 673 {
 674     wine_wgl.p_wglGetIntegerv(pname, params);
 675 }
 676
 677
 678 /* This is for brain-dead applications that use OpenGL functions before even
 679    creating a rendering context.... */
 680 static BOOL process_attach(void)
 681 {
 682   HMODULE mod_x11, mod_gdi32;
 683   DWORD size = sizeof(internal_gl_disabled_extensions);
 684   HKEY hkey = 0;
 685
 686   GetDesktopWindow();  /* make sure winex11 is loaded (FIXME) */
 687   mod_x11 = GetModuleHandleA( "winex11.drv" );
 688   mod_gdi32 = GetModuleHandleA( "gdi32.dll" );
 689
 690   if (!mod_x11 || !mod_gdi32)
 691   {
 692       ERR("X11DRV or GDI32 not loaded. Cannot create default context.\n");
 693       return FALSE;
 694   }
 695
 696   wine_tsx11_lock_ptr   = (void *)GetProcAddress( mod_x11, "wine_tsx11_lock" );
 697   wine_tsx11_unlock_ptr = (void *)GetProcAddress( mod_x11, "wine_tsx11_unlock" );
 698
 699   wine_wgl.p_wglGetProcAddress = (void *)GetProcAddress(mod_gdi32, "wglGetProcAddress");
 700
 701   /* Interal WGL function */
 702   wine_wgl.p_wglDisable = (void *)wine_wgl.p_wglGetProcAddress("wglDisable");
 703   wine_wgl.p_wglEnable = (void *)wine_wgl.p_wglGetProcAddress("wglEnable");
 704   wine_wgl.p_wglGetIntegerv = (void *)wine_wgl.p_wglGetProcAddress("wglGetIntegerv");
 705   wine_wgl.p_wglIsEnabled = (void *)wine_wgl.p_wglGetProcAddress("wglIsEnabled");
 706   wine_wgl.p_wglScissor = (void *)wine_wgl.p_wglGetProcAddress("wglScissor");
 707   wine_wgl.p_wglViewport = (void *)wine_wgl.p_wglGetProcAddress("wglViewport");
 708
 709   internal_gl_disabled_extensions[0] = 0;
 710   if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey)) {
 711     if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (LPBYTE)internal_gl_disabled_extensions, &size)) {
 712       TRACE("found DisabledExtensions=\"%s\"\n", internal_gl_disabled_extensions);
 713     }
 714     RegCloseKey(hkey);
 715   }
 716
 717   return TRUE;
 718 }
 719
 720
 721 /**********************************************************************/
 722
 723 static void process_detach(void)
 724 {
 725   HeapFree(GetProcessHeap(), 0, internal_gl_extensions);
 726 }
 727
 728 /***********************************************************************
 729  *           OpenGL initialisation routine
 730  */
 731 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 732 {
 733     switch(reason)
 734     {
 735     case DLL_PROCESS_ATTACH:
 736         opengl32_handle = hinst;
 737         DisableThreadLibraryCalls(hinst);
 738         return process_attach();
 739     case DLL_PROCESS_DETACH:
 740         process_detach();
 741         break;
 742     }
 743     return TRUE;
 744 }