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