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         return NULL;
 254     }
 255
 256     local_func = wine_wgl.p_wglGetProcAddress(ext_ret->name);
 257
 258     /* After that, look at the extensions defined in the Linux OpenGL library */
 259     if (local_func == NULL) {
 260       char buf[256];
 261       void *ret = NULL;
 262
 263       /* Remove the 3 last letters (EXT, ARB, ...).
 264
 265          I know that some extensions have more than 3 letters (MESA, NV,
 266          INTEL, ...), but this is only a stop-gap measure to fix buggy
 267          OpenGL drivers (moreover, it is only useful for old 1.0 apps
 268          that query the glBindTextureEXT extension).
 269       */
 270       memcpy(buf, ext_ret->name, strlen(ext_ret->name) - 3);
 271       buf[strlen(ext_ret->name) - 3] = '\0';
 272       TRACE(" extension not found in the Linux OpenGL library, checking against libGL bug with %s..\n", buf);
 273
 274       ret = GetProcAddress(opengl32_handle, buf);
 275       if (ret != NULL) {
 276         TRACE(" found function in main OpenGL library (%p) !\n", ret);
 277       } else {
 278         WARN("Did not find function %s (%s) in your OpenGL library !\n", lpszProc, ext_ret->name);
 279       }
 280
 281       return ret;
 282     } else {
 283       TRACE(" returning function  (%p)\n", ext_ret->func);
 284       extension_funcs[ext_ret - extension_registry] = local_func;
 285
 286       return ext_ret->func;
 287     }
 288   }
 289 }
 290
 291 /***********************************************************************
 292  *              wglRealizeLayerPalette (OPENGL32.@)
 293  */
 294 BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
 295                                    int iLayerPlane,
 296                                    BOOL bRealize) {
 297   FIXME("()\n");
 298
 299   return FALSE;
 300 }
 301
 302 /***********************************************************************
 303  *              wglSetLayerPaletteEntries (OPENGL32.@)
 304  */
 305 int WINAPI wglSetLayerPaletteEntries(HDC hdc,
 306                                      int iLayerPlane,
 307                                      int iStart,
 308                                      int cEntries,
 309                                      const COLORREF *pcr) {
 310   FIXME("(): stub !\n");
 311
 312   return 0;
 313 }
 314
 315 /***********************************************************************
 316  *              wglSwapLayerBuffers (OPENGL32.@)
 317  */
 318 BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
 319                                 UINT fuPlanes) {
 320   TRACE_(opengl)("(%p, %08x)\n", hdc, fuPlanes);
 321
 322   if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
 323     if (!SwapBuffers(hdc)) return FALSE;
 324     fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
 325   }
 326
 327   if (fuPlanes) {
 328     WARN("Following layers unhandled : %08x\n", fuPlanes);
 329   }
 330
 331   return TRUE;
 332 }
 333
 334 #ifdef HAVE_GL_GLU_H
 335
 336 static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
 337 {
 338     vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
 339     vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
 340     vertex[2] = 0.0;
 341 }
 342
 343 static void tess_callback_vertex(GLvoid *vertex)
 344 {
 345     GLdouble *dbl = vertex;
 346     TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
 347     glVertex3dv(vertex);
 348 }
 349
 350 static void tess_callback_begin(GLenum which)
 351 {
 352     TRACE("%d\n", which);
 353     glBegin(which);
 354 }
 355
 356 static void tess_callback_end(void)
 357 {
 358     TRACE("\n");
 359     glEnd();
 360 }
 361
 362 /***********************************************************************
 363  *              wglUseFontOutlines_common
 364  */
 365 static BOOL WINAPI wglUseFontOutlines_common(HDC hdc,
 366                                       DWORD first,
 367                                       DWORD count,
 368                                       DWORD listBase,
 369                                       FLOAT deviation,
 370                                       FLOAT extrusion,
 371                                       int format,
 372                                       LPGLYPHMETRICSFLOAT lpgmf,
 373                                       BOOL unicode)
 374 {
 375     UINT glyph;
 376     const MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
 377     GLUtesselator *tess;
 378     LOGFONTW lf;
 379     HFONT old_font, unscaled_font;
 380     UINT em_size = 1024;
 381     RECT rc;
 382
 383     TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
 384           listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
 385
 386
 387     ENTER_GL();
 388     tess = gluNewTess();
 389     if(tess)
 390     {
 391         gluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)tess_callback_vertex);
 392         gluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)tess_callback_begin);
 393         gluTessCallback(tess, GLU_TESS_END, tess_callback_end);
 394     }
 395     LEAVE_GL();
 396
 397     if(!tess) return FALSE;
 398
 399     GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
 400     rc.left = rc.right = rc.bottom = 0;
 401     rc.top = em_size;
 402     DPtoLP(hdc, (POINT*)&rc, 2);
 403     lf.lfHeight = -abs(rc.top - rc.bottom);
 404     lf.lfOrientation = lf.lfEscapement = 0;
 405     unscaled_font = CreateFontIndirectW(&lf);
 406     old_font = SelectObject(hdc, unscaled_font);
 407
 408     for (glyph = first; glyph < first + count; glyph++)
 409     {
 410         DWORD needed;
 411         GLYPHMETRICS gm;
 412         BYTE *buf;
 413         TTPOLYGONHEADER *pph;
 414         TTPOLYCURVE *ppc;
 415         GLdouble *vertices;
 416
 417         if(unicode)
 418             needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
 419         else
 420             needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
 421
 422         if(needed == GDI_ERROR)
 423             goto error;
 424
 425         buf = HeapAlloc(GetProcessHeap(), 0, needed);
 426         vertices = HeapAlloc(GetProcessHeap(), 0, needed / sizeof(POINTFX) * 3 * sizeof(GLdouble));
 427
 428         if(unicode)
 429             GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
 430         else
 431             GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
 432
 433         TRACE("glyph %d\n", glyph);
 434
 435         if(lpgmf)
 436         {
 437             lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
 438             lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
 439             lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
 440             lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
 441             lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
 442             lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
 443
 444             TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
 445                   lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
 446             lpgmf++;
 447         }
 448
 449         ENTER_GL();
 450         glNewList(listBase++, GL_COMPILE);
 451         gluTessBeginPolygon(tess, NULL);
 452
 453         pph = (TTPOLYGONHEADER*)buf;
 454         while((BYTE*)pph < buf + needed)
 455         {
 456             TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
 457
 458             gluTessBeginContour(tess);
 459
 460             fixed_to_double(pph->pfxStart, em_size, vertices);
 461             gluTessVertex(tess, vertices, vertices);
 462             vertices += 3;
 463
 464             ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
 465             while((char*)ppc < (char*)pph + pph->cb)
 466             {
 467                 int i;
 468
 469                 switch(ppc->wType) {
 470                 case TT_PRIM_LINE:
 471                     for(i = 0; i < ppc->cpfx; i++)
 472                     {
 473                         TRACE("\t\tline to %d, %d\n", ppc->apfx[i].x.value, ppc->apfx[i].y.value);
 474                         fixed_to_double(ppc->apfx[i], em_size, vertices);
 475                         gluTessVertex(tess, vertices, vertices);
 476                         vertices += 3;
 477                     }
 478                     break;
 479
 480                 case TT_PRIM_QSPLINE:
 481                     for(i = 0; i < ppc->cpfx/2; i++)
 482                     {
 483                         /* FIXME just connecting the control points for now */
 484                         TRACE("\t\tcurve  %d,%d %d,%d\n",
 485                               ppc->apfx[i * 2].x.value,     ppc->apfx[i * 3].y.value,
 486                               ppc->apfx[i * 2 + 1].x.value, ppc->apfx[i * 3 + 1].y.value);
 487                         fixed_to_double(ppc->apfx[i * 2], em_size, vertices);
 488                         gluTessVertex(tess, vertices, vertices);
 489                         vertices += 3;
 490                         fixed_to_double(ppc->apfx[i * 2 + 1], em_size, vertices);
 491                         gluTessVertex(tess, vertices, vertices);
 492                         vertices += 3;
 493                     }
 494                     break;
 495                 default:
 496                     ERR("\t\tcurve type = %d\n", ppc->wType);
 497                     gluTessEndContour(tess);
 498                     goto error_in_list;
 499                 }
 500
 501                 ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
 502                                      (ppc->cpfx - 1) * sizeof(POINTFX));
 503             }
 504             gluTessEndContour(tess);
 505             pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
 506         }
 507
 508 error_in_list:
 509         gluTessEndPolygon(tess);
 510         glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
 511         glEndList();
 512         LEAVE_GL();
 513         HeapFree(GetProcessHeap(), 0, buf);
 514         HeapFree(GetProcessHeap(), 0, vertices);
 515     }
 516
 517  error:
 518     DeleteObject(SelectObject(hdc, old_font));
 519     gluDeleteTess(tess);
 520     return TRUE;
 521
 522 }
 523
 524 #else /* HAVE_GL_GLU_H */
 525
 526 static BOOL WINAPI wglUseFontOutlines_common(HDC hdc,
 527                                       DWORD first,
 528                                       DWORD count,
 529                                       DWORD listBase,
 530                                       FLOAT deviation,
 531                                       FLOAT extrusion,
 532                                       int format,
 533                                       LPGLYPHMETRICSFLOAT lpgmf,
 534                                       BOOL unicode)
 535 {
 536     FIXME("Unable to compile in wglUseFontOutlines support without GL/glu.h\n");
 537     return FALSE;
 538 }
 539
 540 #endif /* HAVE_GL_GLU_H */
 541
 542 /***********************************************************************
 543  *              wglUseFontOutlinesA (OPENGL32.@)
 544  */
 545 BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
 546                                 DWORD first,
 547                                 DWORD count,
 548                                 DWORD listBase,
 549                                 FLOAT deviation,
 550                                 FLOAT extrusion,
 551                                 int format,
 552                                 LPGLYPHMETRICSFLOAT lpgmf)
 553 {
 554     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
 555 }
 556
 557 /***********************************************************************
 558  *              wglUseFontOutlinesW (OPENGL32.@)
 559  */
 560 BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
 561                                 DWORD first,
 562                                 DWORD count,
 563                                 DWORD listBase,
 564                                 FLOAT deviation,
 565                                 FLOAT extrusion,
 566                                 int format,
 567                                 LPGLYPHMETRICSFLOAT lpgmf)
 568 {
 569     return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
 570 }
 571
 572 /***********************************************************************
 573  *              glEnable (OPENGL32.@)
 574  */
 575 void WINAPI wine_glEnable( GLenum cap )
 576 {
 577     TRACE("(%d)\n", cap );
 578     wine_wgl.p_wglEnable(cap);
 579 }
 580
 581 /***********************************************************************
 582  *              glIsEnabled (OPENGL32.@)
 583  */
 584 GLboolean WINAPI wine_glIsEnabled( GLenum cap )
 585 {
 586     TRACE("(%d)\n", cap );
 587     return wine_wgl.p_wglIsEnabled(cap);
 588 }
 589
 590 /***********************************************************************
 591  *              glDisable (OPENGL32.@)
 592  */
 593 void WINAPI wine_glDisable( GLenum cap )
 594 {
 595     TRACE("(%d)\n", cap );
 596     wine_wgl.p_wglDisable(cap);
 597 }
 598
 599 /***********************************************************************
 600  *              glScissor (OPENGL32.@)
 601  */
 602 void WINAPI wine_glScissor( GLint x, GLint y, GLsizei width, GLsizei height )
 603 {
 604     TRACE("(%d, %d, %d, %d)\n", x, y, width, height );
 605     wine_wgl.p_wglScissor(x, y, width, height);
 606 }
 607
 608 /***********************************************************************
 609  *              glViewport (OPENGL32.@)
 610  */
 611 void WINAPI wine_glViewport( GLint x, GLint y, GLsizei width, GLsizei height )
 612 {
 613     TRACE("(%d, %d, %d, %d)\n", x, y, width, height );
 614     wine_wgl.p_wglViewport(x, y, width, height);
 615 }
 616
 617 /***********************************************************************
 618  *              glGetString (OPENGL32.@)
 619  */
 620 const GLubyte * WINAPI wine_glGetString( GLenum name )
 621 {
 622   const GLubyte *ret;
 623   const char* GL_Extensions = NULL;
 624
 625   if (GL_EXTENSIONS != name) {
 626     ENTER_GL();
 627     ret = glGetString(name);
 628     LEAVE_GL();
 629     return ret;
 630   }
 631
 632   if (NULL == internal_gl_extensions) {
 633     ENTER_GL();
 634     GL_Extensions = (const char *) glGetString(GL_EXTENSIONS);
 635
 636     if (GL_Extensions)
 637     {
 638       size_t len = strlen(GL_Extensions);
 639       internal_gl_extensions = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len + 2);
 640
 641       TRACE("GL_EXTENSIONS reported:\n");
 642       while (*GL_Extensions != 0x00) {
 643         const char* Start = GL_Extensions;
 644         char        ThisExtn[256];
 645
 646         while (*GL_Extensions != ' ' && *GL_Extensions != 0x00) {
 647           GL_Extensions++;
 648         }
 649         memcpy(ThisExtn, Start, (GL_Extensions - Start));
 650         ThisExtn[GL_Extensions - Start] = 0;
 651         TRACE("- %s:", ThisExtn);
 652
 653         /* test if supported API is disabled by config */
 654         if (NULL == strstr(internal_gl_disabled_extensions, ThisExtn)) {
 655           strcat(internal_gl_extensions, " ");
 656           strcat(internal_gl_extensions, ThisExtn);
 657           TRACE(" active\n");
 658         } else {
 659           TRACE(" deactived (by config)\n");
 660         }
 661
 662         if (*GL_Extensions == ' ') GL_Extensions++;
 663       }
 664     }
 665     LEAVE_GL();
 666   }
 667   return (const GLubyte *) internal_gl_extensions;
 668 }
 669
 670 /***********************************************************************
 671  *              glGetIntegerv (OPENGL32.@)
 672  */
 673 void WINAPI wine_glGetIntegerv( GLenum pname, GLint* params )
 674 {
 675     wine_wgl.p_wglGetIntegerv(pname, params);
 676 }
 677
 678
 679 /* No need to load any other libraries as according to the ABI, libGL should be self-sufficient and
 680    include all dependencies
 681 */
 682 #ifndef SONAME_LIBGL
 683 #define SONAME_LIBGL "libGL.so"
 684 #endif
 685
 686 /* This is for brain-dead applications that use OpenGL functions before even
 687    creating a rendering context.... */
 688 static BOOL process_attach(void)
 689 {
 690   HMODULE mod_x11, mod_gdi32;
 691   DWORD size = sizeof(internal_gl_disabled_extensions);
 692   HKEY hkey = 0;
 693
 694   GetDesktopWindow();  /* make sure winex11 is loaded (FIXME) */
 695   mod_x11 = GetModuleHandleA( "winex11.drv" );
 696   mod_gdi32 = GetModuleHandleA( "gdi32.dll" );
 697
 698   if (!mod_x11 || !mod_gdi32)
 699   {
 700       ERR("X11DRV or GDI32 not loaded. Cannot create default context.\n");
 701       return FALSE;
 702   }
 703
 704   wine_tsx11_lock_ptr   = (void *)GetProcAddress( mod_x11, "wine_tsx11_lock" );
 705   wine_tsx11_unlock_ptr = (void *)GetProcAddress( mod_x11, "wine_tsx11_unlock" );
 706
 707   wine_wgl.p_wglGetProcAddress = (void *)GetProcAddress(mod_gdi32, "wglGetProcAddress");
 708
 709   /* Interal WGL function */
 710   wine_wgl.p_wglDisable = (void *)wine_wgl.p_wglGetProcAddress("wglDisable");
 711   wine_wgl.p_wglEnable = (void *)wine_wgl.p_wglGetProcAddress("wglEnable");
 712   wine_wgl.p_wglGetIntegerv = (void *)wine_wgl.p_wglGetProcAddress("wglGetIntegerv");
 713   wine_wgl.p_wglIsEnabled = (void *)wine_wgl.p_wglGetProcAddress("wglIsEnabled");
 714   wine_wgl.p_wglScissor = (void *)wine_wgl.p_wglGetProcAddress("wglScissor");
 715   wine_wgl.p_wglViewport = (void *)wine_wgl.p_wglGetProcAddress("wglViewport");
 716
 717   internal_gl_disabled_extensions[0] = 0;
 718   if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey)) {
 719     if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (LPBYTE)internal_gl_disabled_extensions, &size)) {
 720       TRACE("found DisabledExtensions=\"%s\"\n", internal_gl_disabled_extensions);
 721     }
 722     RegCloseKey(hkey);
 723   }
 724
 725   return TRUE;
 726 }
 727
 728
 729 /**********************************************************************/
 730
 731 static void process_detach(void)
 732 {
 733   HeapFree(GetProcessHeap(), 0, internal_gl_extensions);
 734 }
 735
 736 /***********************************************************************
 737  *           OpenGL initialisation routine
 738  */
 739 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 740 {
 741     switch(reason)
 742     {
 743     case DLL_PROCESS_ATTACH:
 744         opengl32_handle = hinst;
 745         DisableThreadLibraryCalls(hinst);
 746         return process_attach();
 747     case DLL_PROCESS_DETACH:
 748         process_detach();
 749         break;
 750     }
 751     return TRUE;
 752 }