src/gallium/state_trackers/wgl/stw_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <windows.h>
  29
  30 #define WGL_WGLEXT_PROTOTYPES
  31
  32 #include <GL/gl.h>
  33 #include <GL/wglext.h>
  34
  35 #include "pipe/p_compiler.h"
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_state.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_atomic.h"
  40 #include "state_tracker/st_api.h"
  41 #include "hud/hud_context.h"
  42
  43 #include "stw_icd.h"
  44 #include "stw_device.h"
  45 #include "stw_winsys.h"
  46 #include "stw_framebuffer.h"
  47 #include "stw_pixelformat.h"
  48 #include "stw_context.h"
  49 #include "stw_tls.h"
  50
  51
  52 struct stw_context *
  53 stw_current_context(void)
  54 {
  55    struct st_context_iface *st;
  56
  57    st = (stw_dev) ? stw_dev->stapi->get_current(stw_dev->stapi) : NULL;
  58
  59    return (struct stw_context *) ((st) ? st->st_manager_private : NULL);
  60 }
  61
  62 BOOL APIENTRY
  63 DrvCopyContext(
  64    DHGLRC dhrcSource,
  65    DHGLRC dhrcDest,
  66    UINT fuMask )
  67 {
  68    struct stw_context *src;
  69    struct stw_context *dst;
  70    BOOL ret = FALSE;
  71
  72    if (!stw_dev)
  73       return FALSE;
  74
  75    pipe_mutex_lock( stw_dev->ctx_mutex );
  76
  77    src = stw_lookup_context_locked( dhrcSource );
  78    dst = stw_lookup_context_locked( dhrcDest );
  79
  80    if (src && dst) {
  81       /* FIXME */
  82       assert(0);
  83       (void) src;
  84       (void) dst;
  85       (void) fuMask;
  86    }
  87
  88    pipe_mutex_unlock( stw_dev->ctx_mutex );
  89
  90    return ret;
  91 }
  92
  93 BOOL APIENTRY
  94 DrvShareLists(
  95    DHGLRC dhglrc1,
  96    DHGLRC dhglrc2 )
  97 {
  98    struct stw_context *ctx1;
  99    struct stw_context *ctx2;
 100    BOOL ret = FALSE;
 101
 102    if (!stw_dev)
 103       return FALSE;
 104
 105    pipe_mutex_lock( stw_dev->ctx_mutex );
 106
 107    ctx1 = stw_lookup_context_locked( dhglrc1 );
 108    ctx2 = stw_lookup_context_locked( dhglrc2 );
 109
 110    if (ctx1 && ctx2 && ctx2->st->share)
 111       ret = ctx2->st->share(ctx2->st, ctx1->st);
 112
 113    pipe_mutex_unlock( stw_dev->ctx_mutex );
 114
 115    return ret;
 116 }
 117
 118 DHGLRC APIENTRY
 119 DrvCreateContext(
 120    HDC hdc )
 121 {
 122    return DrvCreateLayerContext( hdc, 0 );
 123 }
 124
 125 DHGLRC APIENTRY
 126 DrvCreateLayerContext(
 127    HDC hdc,
 128    INT iLayerPlane )
 129 {
 130    return stw_create_context_attribs(hdc, iLayerPlane, 0, 1, 0, 0,
 131                                      WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
 132                                      0);
 133 }
 134
 135
 136 /**
 137  * Called via DrvCreateContext(), DrvCreateLayerContext() and
 138  * wglCreateContextAttribsARB() to actually create a rendering context.
 139  * \param handle  the desired DHGLRC handle to use for the context, or zero
 140  *                if a new handle should be allocated.
 141  * \return the handle for the new context or zero if there was a problem.
 142  */
 143 DHGLRC
 144 stw_create_context_attribs(HDC hdc, INT iLayerPlane, DHGLRC hShareContext,
 145                            int majorVersion, int minorVersion,
 146                            int contextFlags, int profileMask,
 147                            DHGLRC handle)
 148 {
 149    int iPixelFormat;
 150    struct stw_framebuffer *fb;
 151    const struct stw_pixelformat_info *pfi;
 152    struct st_context_attribs attribs;
 153    struct stw_context *ctx = NULL;
 154    struct stw_context *shareCtx = NULL;
 155    enum st_context_error ctx_err = 0;
 156
 157    if (!stw_dev)
 158       return 0;
 159
 160    if (iLayerPlane != 0)
 161       return 0;
 162
 163    /*
 164     * GDI only knows about displayable pixel formats, so determine the pixel
 165     * format from the framebuffer.
 166     *
 167     * This also allows to use a OpenGL DLL / ICD without installing.
 168     */
 169    fb = stw_framebuffer_from_hdc( hdc );
 170    if (fb) {
 171       iPixelFormat = fb->iPixelFormat;
 172       stw_framebuffer_release(fb);
 173    } else {
 174       return 0;
 175    }
 176
 177    pfi = stw_pixelformat_get_info( iPixelFormat );
 178
 179    if (hShareContext != 0) {
 180       pipe_mutex_lock( stw_dev->ctx_mutex );
 181       shareCtx = stw_lookup_context_locked( hShareContext );
 182       pipe_mutex_unlock( stw_dev->ctx_mutex );
 183    }
 184
 185    ctx = CALLOC_STRUCT( stw_context );
 186    if (ctx == NULL)
 187       goto no_ctx;
 188
 189    ctx->hdc = hdc;
 190    ctx->iPixelFormat = iPixelFormat;
 191
 192    memset(&attribs, 0, sizeof(attribs));
 193    attribs.visual = pfi->stvis;
 194    attribs.major = majorVersion;
 195    attribs.minor = minorVersion;
 196    if (contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
 197       attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
 198    if (contextFlags & WGL_CONTEXT_DEBUG_BIT_ARB)
 199       attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
 200
 201    switch (profileMask) {
 202    case WGL_CONTEXT_CORE_PROFILE_BIT_ARB:
 203       /* There are no profiles before OpenGL 3.2.  The
 204        * WGL_ARB_create_context_profile spec says:
 205        *
 206        *     "If the requested OpenGL version is less than 3.2,
 207        *     WGL_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
 208        *     of the context is determined solely by the requested version."
 209        */
 210       if (majorVersion > 3 || (majorVersion == 3 && minorVersion >= 2)) {
 211          attribs.profile = ST_PROFILE_OPENGL_CORE;
 212          break;
 213       }
 214       /* fall-through */
 215    case WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
 216       /*
 217        * The spec also says:
 218        *
 219        *     "If version 3.1 is requested, the context returned may implement
 220        *     any of the following versions:
 221        *
 222        *       * Version 3.1. The GL_ARB_compatibility extension may or may not
 223        *         be implemented, as determined by the implementation.
 224        *       * The core profile of version 3.2 or greater."
 225        *
 226        * But Mesa doesn't support GL_ARB_compatibility, while most prevalent
 227        * Windows OpenGL implementations do, and unfortunately many Windows
 228        * applications don't check whether they receive or not a context with
 229        * GL_ARB_compatibility, so returning a core profile here does more harm
 230        * than good.
 231        */
 232       attribs.profile = ST_PROFILE_DEFAULT;
 233       break;
 234    case WGL_CONTEXT_ES_PROFILE_BIT_EXT:
 235       if (majorVersion >= 2) {
 236          attribs.profile = ST_PROFILE_OPENGL_ES2;
 237       } else {
 238          attribs.profile = ST_PROFILE_OPENGL_ES1;
 239       }
 240       break;
 241    default:
 242       assert(0);
 243       goto no_st_ctx;
 244    }
 245
 246    ctx->st = stw_dev->stapi->create_context(stw_dev->stapi,
 247          stw_dev->smapi, &attribs, &ctx_err, shareCtx ? shareCtx->st : NULL);
 248    if (ctx->st == NULL)
 249       goto no_st_ctx;
 250
 251    ctx->st->st_manager_private = (void *) ctx;
 252
 253    if (ctx->st->cso_context) {
 254       ctx->hud = hud_create(ctx->st->pipe, ctx->st->cso_context);
 255    }
 256
 257    pipe_mutex_lock( stw_dev->ctx_mutex );
 258    if (handle) {
 259       /* We're replacing the context data for this handle. See the
 260        * wglCreateContextAttribsARB() function.
 261        */
 262       struct stw_context *old_ctx =
 263          stw_lookup_context_locked((unsigned) handle);
 264       if (old_ctx) {
 265          /* free the old context data associated with this handle */
 266          if (old_ctx->hud) {
 267             hud_destroy(old_ctx->hud);
 268          }
 269          ctx->st->destroy(old_ctx->st);
 270          FREE(old_ctx);
 271       }
 272
 273       /* replace table entry */
 274       handle_table_set(stw_dev->ctx_table, (unsigned) handle, ctx);
 275    }
 276    else {
 277       /* create new table entry */
 278       handle = (DHGLRC) handle_table_add(stw_dev->ctx_table, ctx);
 279    }
 280
 281    ctx->dhglrc = handle;
 282
 283    pipe_mutex_unlock( stw_dev->ctx_mutex );
 284    if (!ctx->dhglrc)
 285       goto no_hglrc;
 286
 287    return ctx->dhglrc;
 288
 289 no_hglrc:
 290    if (ctx->hud) {
 291       hud_destroy(ctx->hud);
 292    }
 293    ctx->st->destroy(ctx->st);
 294 no_st_ctx:
 295    FREE(ctx);
 296 no_ctx:
 297    return 0;
 298 }
 299
 300 BOOL APIENTRY
 301 DrvDeleteContext(
 302    DHGLRC dhglrc )
 303 {
 304    struct stw_context *ctx ;
 305    BOOL ret = FALSE;
 306
 307    if (!stw_dev)
 308       return FALSE;
 309
 310    pipe_mutex_lock( stw_dev->ctx_mutex );
 311    ctx = stw_lookup_context_locked(dhglrc);
 312    handle_table_remove(stw_dev->ctx_table, dhglrc);
 313    pipe_mutex_unlock( stw_dev->ctx_mutex );
 314
 315    if (ctx) {
 316       struct stw_context *curctx = stw_current_context();
 317
 318       /* Unbind current if deleting current context. */
 319       if (curctx == ctx)
 320          stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 321
 322       if (ctx->hud) {
 323          hud_destroy(ctx->hud);
 324       }
 325
 326       ctx->st->destroy(ctx->st);
 327       FREE(ctx);
 328
 329       ret = TRUE;
 330    }
 331
 332    return ret;
 333 }
 334
 335 BOOL APIENTRY
 336 DrvReleaseContext(
 337    DHGLRC dhglrc )
 338 {
 339    struct stw_context *ctx;
 340
 341    if (!stw_dev)
 342       return FALSE;
 343
 344    pipe_mutex_lock( stw_dev->ctx_mutex );
 345    ctx = stw_lookup_context_locked( dhglrc );
 346    pipe_mutex_unlock( stw_dev->ctx_mutex );
 347
 348    if (!ctx)
 349       return FALSE;
 350
 351    /* The expectation is that ctx is the same context which is
 352     * current for this thread.  We should check that and return False
 353     * if not the case.
 354     */
 355    if (ctx != stw_current_context())
 356       return FALSE;
 357
 358    if (stw_make_current( NULL, 0 ) == FALSE)
 359       return FALSE;
 360
 361    return TRUE;
 362 }
 363
 364
 365 DHGLRC
 366 stw_get_current_context( void )
 367 {
 368    struct stw_context *ctx;
 369
 370    ctx = stw_current_context();
 371    if(!ctx)
 372       return 0;
 373
 374    return ctx->dhglrc;
 375 }
 376
 377 HDC
 378 stw_get_current_dc( void )
 379 {
 380    struct stw_context *ctx;
 381
 382    ctx = stw_current_context();
 383    if(!ctx)
 384       return NULL;
 385
 386    return ctx->hdc;
 387 }
 388
 389 BOOL
 390 stw_make_current(
 391    HDC hdc,
 392    DHGLRC dhglrc )
 393 {
 394    struct stw_context *curctx = NULL;
 395    struct stw_context *ctx = NULL;
 396    struct stw_framebuffer *fb = NULL;
 397    BOOL ret = FALSE;
 398
 399    if (!stw_dev)
 400       return FALSE;
 401
 402    curctx = stw_current_context();
 403    if (curctx != NULL) {
 404       if (curctx->dhglrc == dhglrc) {
 405          if (curctx->hdc == hdc) {
 406             /* Return if already current. */
 407             return TRUE;
 408          }
 409       } else {
 410          curctx->st->flush(curctx->st, ST_FLUSH_FRONT, NULL);
 411       }
 412    }
 413
 414    if (dhglrc) {
 415       pipe_mutex_lock( stw_dev->ctx_mutex );
 416       ctx = stw_lookup_context_locked( dhglrc );
 417       pipe_mutex_unlock( stw_dev->ctx_mutex );
 418       if (!ctx) {
 419          goto fail;
 420       }
 421
 422       fb = stw_framebuffer_from_hdc( hdc );
 423       if (fb) {
 424          stw_framebuffer_update(fb);
 425       }
 426       else {
 427          /* Applications should call SetPixelFormat before creating a context,
 428           * but not all do, and the opengl32 runtime seems to use a default pixel
 429           * format in some cases, so we must create a framebuffer for those here
 430           */
 431          int iPixelFormat = GetPixelFormat(hdc);
 432          if (iPixelFormat)
 433             fb = stw_framebuffer_create( hdc, iPixelFormat );
 434          if (!fb)
 435             goto fail;
 436       }
 437
 438       if (fb->iPixelFormat != ctx->iPixelFormat) {
 439          SetLastError(ERROR_INVALID_PIXEL_FORMAT);
 440          goto fail;
 441       }
 442
 443       /* Bind the new framebuffer */
 444       ctx->hdc = hdc;
 445
 446       ret = stw_dev->stapi->make_current(stw_dev->stapi, ctx->st,
 447                                          fb->stfb, fb->stfb);
 448       stw_framebuffer_reference(&ctx->current_framebuffer, fb);
 449    } else {
 450       ret = stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 451    }
 452
 453 fail:
 454
 455    if (fb) {
 456       stw_framebuffer_release(fb);
 457    }
 458
 459    /* On failure, make the thread's current rendering context not current
 460     * before returning */
 461    if (!ret) {
 462       stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 463       ctx = NULL;
 464    }
 465
 466    /* Unreference the previous framebuffer if any. It must be done after
 467     * make_current, as it can be referenced inside.
 468     */
 469    if (curctx && curctx != ctx) {
 470       stw_framebuffer_reference(&curctx->current_framebuffer, NULL);
 471    }
 472
 473    return ret;
 474 }
 475
 476 /**
 477  * Flush the current context if it is bound to the framebuffer.
 478  */
 479 void
 480 stw_flush_current_locked( struct stw_framebuffer *fb )
 481 {
 482    struct stw_context *ctx = stw_current_context();
 483
 484    if (ctx && ctx->current_framebuffer == fb) {
 485       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 486    }
 487 }
 488
 489 /**
 490  * Notify the current context that the framebuffer has become invalid.
 491  */
 492 void
 493 stw_notify_current_locked( struct stw_framebuffer *fb )
 494 {
 495    p_atomic_inc(&fb->stfb->stamp);
 496 }
 497
 498 /**
 499  * Although WGL allows different dispatch entrypoints per context
 500  */
 501 static const GLCLTPROCTABLE cpt =
 502 {
 503    OPENGL_VERSION_110_ENTRIES,
 504    {
 505       &glNewList,
 506       &glEndList,
 507       &glCallList,
 508       &glCallLists,
 509       &glDeleteLists,
 510       &glGenLists,
 511       &glListBase,
 512       &glBegin,
 513       &glBitmap,
 514       &glColor3b,
 515       &glColor3bv,
 516       &glColor3d,
 517       &glColor3dv,
 518       &glColor3f,
 519       &glColor3fv,
 520       &glColor3i,
 521       &glColor3iv,
 522       &glColor3s,
 523       &glColor3sv,
 524       &glColor3ub,
 525       &glColor3ubv,
 526       &glColor3ui,
 527       &glColor3uiv,
 528       &glColor3us,
 529       &glColor3usv,
 530       &glColor4b,
 531       &glColor4bv,
 532       &glColor4d,
 533       &glColor4dv,
 534       &glColor4f,
 535       &glColor4fv,
 536       &glColor4i,
 537       &glColor4iv,
 538       &glColor4s,
 539       &glColor4sv,
 540       &glColor4ub,
 541       &glColor4ubv,
 542       &glColor4ui,
 543       &glColor4uiv,
 544       &glColor4us,
 545       &glColor4usv,
 546       &glEdgeFlag,
 547       &glEdgeFlagv,
 548       &glEnd,
 549       &glIndexd,
 550       &glIndexdv,
 551       &glIndexf,
 552       &glIndexfv,
 553       &glIndexi,
 554       &glIndexiv,
 555       &glIndexs,
 556       &glIndexsv,
 557       &glNormal3b,
 558       &glNormal3bv,
 559       &glNormal3d,
 560       &glNormal3dv,
 561       &glNormal3f,
 562       &glNormal3fv,
 563       &glNormal3i,
 564       &glNormal3iv,
 565       &glNormal3s,
 566       &glNormal3sv,
 567       &glRasterPos2d,
 568       &glRasterPos2dv,
 569       &glRasterPos2f,
 570       &glRasterPos2fv,
 571       &glRasterPos2i,
 572       &glRasterPos2iv,
 573       &glRasterPos2s,
 574       &glRasterPos2sv,
 575       &glRasterPos3d,
 576       &glRasterPos3dv,
 577       &glRasterPos3f,
 578       &glRasterPos3fv,
 579       &glRasterPos3i,
 580       &glRasterPos3iv,
 581       &glRasterPos3s,
 582       &glRasterPos3sv,
 583       &glRasterPos4d,
 584       &glRasterPos4dv,
 585       &glRasterPos4f,
 586       &glRasterPos4fv,
 587       &glRasterPos4i,
 588       &glRasterPos4iv,
 589       &glRasterPos4s,
 590       &glRasterPos4sv,
 591       &glRectd,
 592       &glRectdv,
 593       &glRectf,
 594       &glRectfv,
 595       &glRecti,
 596       &glRectiv,
 597       &glRects,
 598       &glRectsv,
 599       &glTexCoord1d,
 600       &glTexCoord1dv,
 601       &glTexCoord1f,
 602       &glTexCoord1fv,
 603       &glTexCoord1i,
 604       &glTexCoord1iv,
 605       &glTexCoord1s,
 606       &glTexCoord1sv,
 607       &glTexCoord2d,
 608       &glTexCoord2dv,
 609       &glTexCoord2f,
 610       &glTexCoord2fv,
 611       &glTexCoord2i,
 612       &glTexCoord2iv,
 613       &glTexCoord2s,
 614       &glTexCoord2sv,
 615       &glTexCoord3d,
 616       &glTexCoord3dv,
 617       &glTexCoord3f,
 618       &glTexCoord3fv,
 619       &glTexCoord3i,
 620       &glTexCoord3iv,
 621       &glTexCoord3s,
 622       &glTexCoord3sv,
 623       &glTexCoord4d,
 624       &glTexCoord4dv,
 625       &glTexCoord4f,
 626       &glTexCoord4fv,
 627       &glTexCoord4i,
 628       &glTexCoord4iv,
 629       &glTexCoord4s,
 630       &glTexCoord4sv,
 631       &glVertex2d,
 632       &glVertex2dv,
 633       &glVertex2f,
 634       &glVertex2fv,
 635       &glVertex2i,
 636       &glVertex2iv,
 637       &glVertex2s,
 638       &glVertex2sv,
 639       &glVertex3d,
 640       &glVertex3dv,
 641       &glVertex3f,
 642       &glVertex3fv,
 643       &glVertex3i,
 644       &glVertex3iv,
 645       &glVertex3s,
 646       &glVertex3sv,
 647       &glVertex4d,
 648       &glVertex4dv,
 649       &glVertex4f,
 650       &glVertex4fv,
 651       &glVertex4i,
 652       &glVertex4iv,
 653       &glVertex4s,
 654       &glVertex4sv,
 655       &glClipPlane,
 656       &glColorMaterial,
 657       &glCullFace,
 658       &glFogf,
 659       &glFogfv,
 660       &glFogi,
 661       &glFogiv,
 662       &glFrontFace,
 663       &glHint,
 664       &glLightf,
 665       &glLightfv,
 666       &glLighti,
 667       &glLightiv,
 668       &glLightModelf,
 669       &glLightModelfv,
 670       &glLightModeli,
 671       &glLightModeliv,
 672       &glLineStipple,
 673       &glLineWidth,
 674       &glMaterialf,
 675       &glMaterialfv,
 676       &glMateriali,
 677       &glMaterialiv,
 678       &glPointSize,
 679       &glPolygonMode,
 680       &glPolygonStipple,
 681       &glScissor,
 682       &glShadeModel,
 683       &glTexParameterf,
 684       &glTexParameterfv,
 685       &glTexParameteri,
 686       &glTexParameteriv,
 687       &glTexImage1D,
 688       &glTexImage2D,
 689       &glTexEnvf,
 690       &glTexEnvfv,
 691       &glTexEnvi,
 692       &glTexEnviv,
 693       &glTexGend,
 694       &glTexGendv,
 695       &glTexGenf,
 696       &glTexGenfv,
 697       &glTexGeni,
 698       &glTexGeniv,
 699       &glFeedbackBuffer,
 700       &glSelectBuffer,
 701       &glRenderMode,
 702       &glInitNames,
 703       &glLoadName,
 704       &glPassThrough,
 705       &glPopName,
 706       &glPushName,
 707       &glDrawBuffer,
 708       &glClear,
 709       &glClearAccum,
 710       &glClearIndex,
 711       &glClearColor,
 712       &glClearStencil,
 713       &glClearDepth,
 714       &glStencilMask,
 715       &glColorMask,
 716       &glDepthMask,
 717       &glIndexMask,
 718       &glAccum,
 719       &glDisable,
 720       &glEnable,
 721       &glFinish,
 722       &glFlush,
 723       &glPopAttrib,
 724       &glPushAttrib,
 725       &glMap1d,
 726       &glMap1f,
 727       &glMap2d,
 728       &glMap2f,
 729       &glMapGrid1d,
 730       &glMapGrid1f,
 731       &glMapGrid2d,
 732       &glMapGrid2f,
 733       &glEvalCoord1d,
 734       &glEvalCoord1dv,
 735       &glEvalCoord1f,
 736       &glEvalCoord1fv,
 737       &glEvalCoord2d,
 738       &glEvalCoord2dv,
 739       &glEvalCoord2f,
 740       &glEvalCoord2fv,
 741       &glEvalMesh1,
 742       &glEvalPoint1,
 743       &glEvalMesh2,
 744       &glEvalPoint2,
 745       &glAlphaFunc,
 746       &glBlendFunc,
 747       &glLogicOp,
 748       &glStencilFunc,
 749       &glStencilOp,
 750       &glDepthFunc,
 751       &glPixelZoom,
 752       &glPixelTransferf,
 753       &glPixelTransferi,
 754       &glPixelStoref,
 755       &glPixelStorei,
 756       &glPixelMapfv,
 757       &glPixelMapuiv,
 758       &glPixelMapusv,
 759       &glReadBuffer,
 760       &glCopyPixels,
 761       &glReadPixels,
 762       &glDrawPixels,
 763       &glGetBooleanv,
 764       &glGetClipPlane,
 765       &glGetDoublev,
 766       &glGetError,
 767       &glGetFloatv,
 768       &glGetIntegerv,
 769       &glGetLightfv,
 770       &glGetLightiv,
 771       &glGetMapdv,
 772       &glGetMapfv,
 773       &glGetMapiv,
 774       &glGetMaterialfv,
 775       &glGetMaterialiv,
 776       &glGetPixelMapfv,
 777       &glGetPixelMapuiv,
 778       &glGetPixelMapusv,
 779       &glGetPolygonStipple,
 780       &glGetString,
 781       &glGetTexEnvfv,
 782       &glGetTexEnviv,
 783       &glGetTexGendv,
 784       &glGetTexGenfv,
 785       &glGetTexGeniv,
 786       &glGetTexImage,
 787       &glGetTexParameterfv,
 788       &glGetTexParameteriv,
 789       &glGetTexLevelParameterfv,
 790       &glGetTexLevelParameteriv,
 791       &glIsEnabled,
 792       &glIsList,
 793       &glDepthRange,
 794       &glFrustum,
 795       &glLoadIdentity,
 796       &glLoadMatrixf,
 797       &glLoadMatrixd,
 798       &glMatrixMode,
 799       &glMultMatrixf,
 800       &glMultMatrixd,
 801       &glOrtho,
 802       &glPopMatrix,
 803       &glPushMatrix,
 804       &glRotated,
 805       &glRotatef,
 806       &glScaled,
 807       &glScalef,
 808       &glTranslated,
 809       &glTranslatef,
 810       &glViewport,
 811       &glArrayElement,
 812       &glBindTexture,
 813       &glColorPointer,
 814       &glDisableClientState,
 815       &glDrawArrays,
 816       &glDrawElements,
 817       &glEdgeFlagPointer,
 818       &glEnableClientState,
 819       &glIndexPointer,
 820       &glIndexub,
 821       &glIndexubv,
 822       &glInterleavedArrays,
 823       &glNormalPointer,
 824       &glPolygonOffset,
 825       &glTexCoordPointer,
 826       &glVertexPointer,
 827       &glAreTexturesResident,
 828       &glCopyTexImage1D,
 829       &glCopyTexImage2D,
 830       &glCopyTexSubImage1D,
 831       &glCopyTexSubImage2D,
 832       &glDeleteTextures,
 833       &glGenTextures,
 834       &glGetPointerv,
 835       &glIsTexture,
 836       &glPrioritizeTextures,
 837       &glTexSubImage1D,
 838       &glTexSubImage2D,
 839       &glPopClientAttrib,
 840       &glPushClientAttrib
 841    }
 842 };
 843
 844 PGLCLTPROCTABLE APIENTRY
 845 DrvSetContext(
 846    HDC hdc,
 847    DHGLRC dhglrc,
 848    PFN_SETPROCTABLE pfnSetProcTable )
 849 {
 850    PGLCLTPROCTABLE r = (PGLCLTPROCTABLE)&cpt;
 851
 852    if (!stw_make_current( hdc, dhglrc ))
 853       r = NULL;
 854
 855    return r;
 856 }