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