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 }
 133
 134 DHGLRC
 135 stw_create_context_attribs(
 136    HDC hdc,
 137    INT iLayerPlane,
 138    DHGLRC hShareContext,
 139    int majorVersion, int minorVersion,
 140    int contextFlags, int profileMask)
 141 {
 142    int iPixelFormat;
 143    struct stw_framebuffer *fb;
 144    const struct stw_pixelformat_info *pfi;
 145    struct st_context_attribs attribs;
 146    struct stw_context *ctx = NULL;
 147    struct stw_context *shareCtx = NULL;
 148    enum st_context_error ctx_err = 0;
 149
 150    if (!stw_dev)
 151       return 0;
 152
 153    if (iLayerPlane != 0)
 154       return 0;
 155
 156    iPixelFormat = GetPixelFormat(hdc);
 157    if(!iPixelFormat)
 158       return 0;
 159
 160    /*
 161     * GDI only knows about displayable pixel formats, so determine the pixel
 162     * format from the framebuffer.
 163     *
 164     * TODO: Remove the GetPixelFormat() above, and stop relying on GDI.
 165     */
 166    fb = stw_framebuffer_from_hdc( hdc );
 167    if (fb) {
 168       assert(iPixelFormat == fb->iDisplayablePixelFormat);
 169       iPixelFormat = fb->iPixelFormat;
 170       stw_framebuffer_release(fb);
 171    }
 172
 173    pfi = stw_pixelformat_get_info( iPixelFormat );
 174
 175    if (hShareContext != 0) {
 176       pipe_mutex_lock( stw_dev->ctx_mutex );
 177       shareCtx = stw_lookup_context_locked( hShareContext );
 178       pipe_mutex_unlock( stw_dev->ctx_mutex );
 179    }
 180
 181    ctx = CALLOC_STRUCT( stw_context );
 182    if (ctx == NULL)
 183       goto no_ctx;
 184
 185    ctx->hdc = hdc;
 186    ctx->iPixelFormat = iPixelFormat;
 187
 188    memset(&attribs, 0, sizeof(attribs));
 189    attribs.visual = pfi->stvis;
 190    attribs.major = majorVersion;
 191    attribs.minor = minorVersion;
 192    if (contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
 193       attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
 194    if (contextFlags & WGL_CONTEXT_DEBUG_BIT_ARB)
 195       attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
 196
 197    /* There are no profiles before OpenGL 3.2.  The
 198     * WGL_ARB_create_context_profile spec says:
 199     *
 200     *     "If the requested OpenGL version is less than 3.2,
 201     *     WGL_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality of the
 202     *     context is determined solely by the requested version."
 203     *
 204     * The spec also says:
 205     *
 206     *     "The default value for WGL_CONTEXT_PROFILE_MASK_ARB is
 207     *     WGL_CONTEXT_CORE_PROFILE_BIT_ARB."
 208     *
 209     * The spec also says:
 210     *
 211     *     "If version 3.1 is requested, the context returned may implement
 212     *     any of the following versions:
 213     *
 214     *       * Version 3.1. The GL_ARB_compatibility extension may or may not
 215     *         be implemented, as determined by the implementation.
 216     *       * The core profile of version 3.2 or greater."
 217     *
 218     * and because Mesa doesn't support GL_ARB_compatibility, the only chance to
 219     * honour a 3.1 context is through core profile.
 220     */
 221    attribs.profile = ST_PROFILE_DEFAULT;
 222    if (((majorVersion > 3 || (majorVersion == 3 && minorVersion >= 2))
 223         && ((profileMask & WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) == 0)) ||
 224        (majorVersion == 3 && minorVersion == 1))
 225       attribs.profile = ST_PROFILE_OPENGL_CORE;
 226
 227    ctx->st = stw_dev->stapi->create_context(stw_dev->stapi,
 228          stw_dev->smapi, &attribs, &ctx_err, shareCtx ? shareCtx->st : NULL);
 229    if (ctx->st == NULL)
 230       goto no_st_ctx;
 231
 232    ctx->st->st_manager_private = (void *) ctx;
 233
 234    if (ctx->st->cso_context) {
 235       ctx->hud = hud_create(ctx->st->pipe, ctx->st->cso_context);
 236    }
 237
 238    pipe_mutex_lock( stw_dev->ctx_mutex );
 239    ctx->dhglrc = handle_table_add(stw_dev->ctx_table, ctx);
 240    pipe_mutex_unlock( stw_dev->ctx_mutex );
 241    if (!ctx->dhglrc)
 242       goto no_hglrc;
 243
 244    return ctx->dhglrc;
 245
 246 no_hglrc:
 247    if (ctx->hud) {
 248       hud_destroy(ctx->hud);
 249    }
 250    ctx->st->destroy(ctx->st);
 251 no_st_ctx:
 252    FREE(ctx);
 253 no_ctx:
 254    return 0;
 255 }
 256
 257 BOOL APIENTRY
 258 DrvDeleteContext(
 259    DHGLRC dhglrc )
 260 {
 261    struct stw_context *ctx ;
 262    BOOL ret = FALSE;
 263
 264    if (!stw_dev)
 265       return FALSE;
 266
 267    pipe_mutex_lock( stw_dev->ctx_mutex );
 268    ctx = stw_lookup_context_locked(dhglrc);
 269    handle_table_remove(stw_dev->ctx_table, dhglrc);
 270    pipe_mutex_unlock( stw_dev->ctx_mutex );
 271
 272    if (ctx) {
 273       struct stw_context *curctx = stw_current_context();
 274
 275       /* Unbind current if deleting current context. */
 276       if (curctx == ctx)
 277          stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 278
 279       if (ctx->hud) {
 280          hud_destroy(ctx->hud);
 281       }
 282
 283       ctx->st->destroy(ctx->st);
 284       FREE(ctx);
 285
 286       ret = TRUE;
 287    }
 288
 289    return ret;
 290 }
 291
 292 BOOL APIENTRY
 293 DrvReleaseContext(
 294    DHGLRC dhglrc )
 295 {
 296    struct stw_context *ctx;
 297
 298    if (!stw_dev)
 299       return FALSE;
 300
 301    pipe_mutex_lock( stw_dev->ctx_mutex );
 302    ctx = stw_lookup_context_locked( dhglrc );
 303    pipe_mutex_unlock( stw_dev->ctx_mutex );
 304
 305    if (!ctx)
 306       return FALSE;
 307
 308    /* The expectation is that ctx is the same context which is
 309     * current for this thread.  We should check that and return False
 310     * if not the case.
 311     */
 312    if (ctx != stw_current_context())
 313       return FALSE;
 314
 315    if (stw_make_current( NULL, 0 ) == FALSE)
 316       return FALSE;
 317
 318    return TRUE;
 319 }
 320
 321
 322 DHGLRC
 323 stw_get_current_context( void )
 324 {
 325    struct stw_context *ctx;
 326
 327    ctx = stw_current_context();
 328    if(!ctx)
 329       return 0;
 330
 331    return ctx->dhglrc;
 332 }
 333
 334 HDC
 335 stw_get_current_dc( void )
 336 {
 337    struct stw_context *ctx;
 338
 339    ctx = stw_current_context();
 340    if(!ctx)
 341       return NULL;
 342
 343    return ctx->hdc;
 344 }
 345
 346 BOOL
 347 stw_make_current(
 348    HDC hdc,
 349    DHGLRC dhglrc )
 350 {
 351    struct stw_context *curctx = NULL;
 352    struct stw_context *ctx = NULL;
 353    struct stw_framebuffer *fb = NULL;
 354    BOOL ret = FALSE;
 355
 356    if (!stw_dev)
 357       return FALSE;
 358
 359    curctx = stw_current_context();
 360    if (curctx != NULL) {
 361       if (curctx->dhglrc == dhglrc) {
 362          if (curctx->hdc == hdc) {
 363             /* Return if already current. */
 364             return TRUE;
 365          }
 366       } else {
 367          curctx->st->flush(curctx->st, ST_FLUSH_FRONT, NULL);
 368       }
 369    }
 370
 371    if (dhglrc) {
 372       pipe_mutex_lock( stw_dev->ctx_mutex );
 373       ctx = stw_lookup_context_locked( dhglrc );
 374       pipe_mutex_unlock( stw_dev->ctx_mutex );
 375       if (!ctx) {
 376          goto fail;
 377       }
 378
 379       fb = stw_framebuffer_from_hdc( hdc );
 380       if (fb) {
 381          stw_framebuffer_update(fb);
 382       }
 383       else {
 384          /* Applications should call SetPixelFormat before creating a context,
 385           * but not all do, and the opengl32 runtime seems to use a default pixel
 386           * format in some cases, so we must create a framebuffer for those here
 387           */
 388          int iPixelFormat = GetPixelFormat(hdc);
 389          if (iPixelFormat)
 390             fb = stw_framebuffer_create( hdc, iPixelFormat );
 391          if (!fb)
 392             goto fail;
 393       }
 394
 395       if (fb->iPixelFormat != ctx->iPixelFormat) {
 396          SetLastError(ERROR_INVALID_PIXEL_FORMAT);
 397          goto fail;
 398       }
 399
 400       /* Bind the new framebuffer */
 401       ctx->hdc = hdc;
 402
 403       ret = stw_dev->stapi->make_current(stw_dev->stapi, ctx->st,
 404                                          fb->stfb, fb->stfb);
 405       stw_framebuffer_reference(&ctx->current_framebuffer, fb);
 406    } else {
 407       ret = stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 408    }
 409
 410 fail:
 411
 412    if (fb) {
 413       stw_framebuffer_release(fb);
 414    }
 415
 416    /* On failure, make the thread's current rendering context not current
 417     * before returning */
 418    if (!ret) {
 419       stw_dev->stapi->make_current(stw_dev->stapi, NULL, NULL, NULL);
 420       ctx = NULL;
 421    }
 422
 423    /* Unreference the previous framebuffer if any. It must be done after
 424     * make_current, as it can be referenced inside.
 425     */
 426    if (curctx && curctx != ctx) {
 427       stw_framebuffer_reference(&curctx->current_framebuffer, NULL);
 428    }
 429
 430    return ret;
 431 }
 432
 433 /**
 434  * Flush the current context if it is bound to the framebuffer.
 435  */
 436 void
 437 stw_flush_current_locked( struct stw_framebuffer *fb )
 438 {
 439    struct stw_context *ctx = stw_current_context();
 440
 441    if (ctx && ctx->current_framebuffer == fb) {
 442       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 443    }
 444 }
 445
 446 /**
 447  * Notify the current context that the framebuffer has become invalid.
 448  */
 449 void
 450 stw_notify_current_locked( struct stw_framebuffer *fb )
 451 {
 452    p_atomic_inc(&fb->stfb->stamp);
 453 }
 454
 455 /**
 456  * Although WGL allows different dispatch entrypoints per context
 457  */
 458 static const GLCLTPROCTABLE cpt =
 459 {
 460    OPENGL_VERSION_110_ENTRIES,
 461    {
 462       &glNewList,
 463       &glEndList,
 464       &glCallList,
 465       &glCallLists,
 466       &glDeleteLists,
 467       &glGenLists,
 468       &glListBase,
 469       &glBegin,
 470       &glBitmap,
 471       &glColor3b,
 472       &glColor3bv,
 473       &glColor3d,
 474       &glColor3dv,
 475       &glColor3f,
 476       &glColor3fv,
 477       &glColor3i,
 478       &glColor3iv,
 479       &glColor3s,
 480       &glColor3sv,
 481       &glColor3ub,
 482       &glColor3ubv,
 483       &glColor3ui,
 484       &glColor3uiv,
 485       &glColor3us,
 486       &glColor3usv,
 487       &glColor4b,
 488       &glColor4bv,
 489       &glColor4d,
 490       &glColor4dv,
 491       &glColor4f,
 492       &glColor4fv,
 493       &glColor4i,
 494       &glColor4iv,
 495       &glColor4s,
 496       &glColor4sv,
 497       &glColor4ub,
 498       &glColor4ubv,
 499       &glColor4ui,
 500       &glColor4uiv,
 501       &glColor4us,
 502       &glColor4usv,
 503       &glEdgeFlag,
 504       &glEdgeFlagv,
 505       &glEnd,
 506       &glIndexd,
 507       &glIndexdv,
 508       &glIndexf,
 509       &glIndexfv,
 510       &glIndexi,
 511       &glIndexiv,
 512       &glIndexs,
 513       &glIndexsv,
 514       &glNormal3b,
 515       &glNormal3bv,
 516       &glNormal3d,
 517       &glNormal3dv,
 518       &glNormal3f,
 519       &glNormal3fv,
 520       &glNormal3i,
 521       &glNormal3iv,
 522       &glNormal3s,
 523       &glNormal3sv,
 524       &glRasterPos2d,
 525       &glRasterPos2dv,
 526       &glRasterPos2f,
 527       &glRasterPos2fv,
 528       &glRasterPos2i,
 529       &glRasterPos2iv,
 530       &glRasterPos2s,
 531       &glRasterPos2sv,
 532       &glRasterPos3d,
 533       &glRasterPos3dv,
 534       &glRasterPos3f,
 535       &glRasterPos3fv,
 536       &glRasterPos3i,
 537       &glRasterPos3iv,
 538       &glRasterPos3s,
 539       &glRasterPos3sv,
 540       &glRasterPos4d,
 541       &glRasterPos4dv,
 542       &glRasterPos4f,
 543       &glRasterPos4fv,
 544       &glRasterPos4i,
 545       &glRasterPos4iv,
 546       &glRasterPos4s,
 547       &glRasterPos4sv,
 548       &glRectd,
 549       &glRectdv,
 550       &glRectf,
 551       &glRectfv,
 552       &glRecti,
 553       &glRectiv,
 554       &glRects,
 555       &glRectsv,
 556       &glTexCoord1d,
 557       &glTexCoord1dv,
 558       &glTexCoord1f,
 559       &glTexCoord1fv,
 560       &glTexCoord1i,
 561       &glTexCoord1iv,
 562       &glTexCoord1s,
 563       &glTexCoord1sv,
 564       &glTexCoord2d,
 565       &glTexCoord2dv,
 566       &glTexCoord2f,
 567       &glTexCoord2fv,
 568       &glTexCoord2i,
 569       &glTexCoord2iv,
 570       &glTexCoord2s,
 571       &glTexCoord2sv,
 572       &glTexCoord3d,
 573       &glTexCoord3dv,
 574       &glTexCoord3f,
 575       &glTexCoord3fv,
 576       &glTexCoord3i,
 577       &glTexCoord3iv,
 578       &glTexCoord3s,
 579       &glTexCoord3sv,
 580       &glTexCoord4d,
 581       &glTexCoord4dv,
 582       &glTexCoord4f,
 583       &glTexCoord4fv,
 584       &glTexCoord4i,
 585       &glTexCoord4iv,
 586       &glTexCoord4s,
 587       &glTexCoord4sv,
 588       &glVertex2d,
 589       &glVertex2dv,
 590       &glVertex2f,
 591       &glVertex2fv,
 592       &glVertex2i,
 593       &glVertex2iv,
 594       &glVertex2s,
 595       &glVertex2sv,
 596       &glVertex3d,
 597       &glVertex3dv,
 598       &glVertex3f,
 599       &glVertex3fv,
 600       &glVertex3i,
 601       &glVertex3iv,
 602       &glVertex3s,
 603       &glVertex3sv,
 604       &glVertex4d,
 605       &glVertex4dv,
 606       &glVertex4f,
 607       &glVertex4fv,
 608       &glVertex4i,
 609       &glVertex4iv,
 610       &glVertex4s,
 611       &glVertex4sv,
 612       &glClipPlane,
 613       &glColorMaterial,
 614       &glCullFace,
 615       &glFogf,
 616       &glFogfv,
 617       &glFogi,
 618       &glFogiv,
 619       &glFrontFace,
 620       &glHint,
 621       &glLightf,
 622       &glLightfv,
 623       &glLighti,
 624       &glLightiv,
 625       &glLightModelf,
 626       &glLightModelfv,
 627       &glLightModeli,
 628       &glLightModeliv,
 629       &glLineStipple,
 630       &glLineWidth,
 631       &glMaterialf,
 632       &glMaterialfv,
 633       &glMateriali,
 634       &glMaterialiv,
 635       &glPointSize,
 636       &glPolygonMode,
 637       &glPolygonStipple,
 638       &glScissor,
 639       &glShadeModel,
 640       &glTexParameterf,
 641       &glTexParameterfv,
 642       &glTexParameteri,
 643       &glTexParameteriv,
 644       &glTexImage1D,
 645       &glTexImage2D,
 646       &glTexEnvf,
 647       &glTexEnvfv,
 648       &glTexEnvi,
 649       &glTexEnviv,
 650       &glTexGend,
 651       &glTexGendv,
 652       &glTexGenf,
 653       &glTexGenfv,
 654       &glTexGeni,
 655       &glTexGeniv,
 656       &glFeedbackBuffer,
 657       &glSelectBuffer,
 658       &glRenderMode,
 659       &glInitNames,
 660       &glLoadName,
 661       &glPassThrough,
 662       &glPopName,
 663       &glPushName,
 664       &glDrawBuffer,
 665       &glClear,
 666       &glClearAccum,
 667       &glClearIndex,
 668       &glClearColor,
 669       &glClearStencil,
 670       &glClearDepth,
 671       &glStencilMask,
 672       &glColorMask,
 673       &glDepthMask,
 674       &glIndexMask,
 675       &glAccum,
 676       &glDisable,
 677       &glEnable,
 678       &glFinish,
 679       &glFlush,
 680       &glPopAttrib,
 681       &glPushAttrib,
 682       &glMap1d,
 683       &glMap1f,
 684       &glMap2d,
 685       &glMap2f,
 686       &glMapGrid1d,
 687       &glMapGrid1f,
 688       &glMapGrid2d,
 689       &glMapGrid2f,
 690       &glEvalCoord1d,
 691       &glEvalCoord1dv,
 692       &glEvalCoord1f,
 693       &glEvalCoord1fv,
 694       &glEvalCoord2d,
 695       &glEvalCoord2dv,
 696       &glEvalCoord2f,
 697       &glEvalCoord2fv,
 698       &glEvalMesh1,
 699       &glEvalPoint1,
 700       &glEvalMesh2,
 701       &glEvalPoint2,
 702       &glAlphaFunc,
 703       &glBlendFunc,
 704       &glLogicOp,
 705       &glStencilFunc,
 706       &glStencilOp,
 707       &glDepthFunc,
 708       &glPixelZoom,
 709       &glPixelTransferf,
 710       &glPixelTransferi,
 711       &glPixelStoref,
 712       &glPixelStorei,
 713       &glPixelMapfv,
 714       &glPixelMapuiv,
 715       &glPixelMapusv,
 716       &glReadBuffer,
 717       &glCopyPixels,
 718       &glReadPixels,
 719       &glDrawPixels,
 720       &glGetBooleanv,
 721       &glGetClipPlane,
 722       &glGetDoublev,
 723       &glGetError,
 724       &glGetFloatv,
 725       &glGetIntegerv,
 726       &glGetLightfv,
 727       &glGetLightiv,
 728       &glGetMapdv,
 729       &glGetMapfv,
 730       &glGetMapiv,
 731       &glGetMaterialfv,
 732       &glGetMaterialiv,
 733       &glGetPixelMapfv,
 734       &glGetPixelMapuiv,
 735       &glGetPixelMapusv,
 736       &glGetPolygonStipple,
 737       &glGetString,
 738       &glGetTexEnvfv,
 739       &glGetTexEnviv,
 740       &glGetTexGendv,
 741       &glGetTexGenfv,
 742       &glGetTexGeniv,
 743       &glGetTexImage,
 744       &glGetTexParameterfv,
 745       &glGetTexParameteriv,
 746       &glGetTexLevelParameterfv,
 747       &glGetTexLevelParameteriv,
 748       &glIsEnabled,
 749       &glIsList,
 750       &glDepthRange,
 751       &glFrustum,
 752       &glLoadIdentity,
 753       &glLoadMatrixf,
 754       &glLoadMatrixd,
 755       &glMatrixMode,
 756       &glMultMatrixf,
 757       &glMultMatrixd,
 758       &glOrtho,
 759       &glPopMatrix,
 760       &glPushMatrix,
 761       &glRotated,
 762       &glRotatef,
 763       &glScaled,
 764       &glScalef,
 765       &glTranslated,
 766       &glTranslatef,
 767       &glViewport,
 768       &glArrayElement,
 769       &glBindTexture,
 770       &glColorPointer,
 771       &glDisableClientState,
 772       &glDrawArrays,
 773       &glDrawElements,
 774       &glEdgeFlagPointer,
 775       &glEnableClientState,
 776       &glIndexPointer,
 777       &glIndexub,
 778       &glIndexubv,
 779       &glInterleavedArrays,
 780       &glNormalPointer,
 781       &glPolygonOffset,
 782       &glTexCoordPointer,
 783       &glVertexPointer,
 784       &glAreTexturesResident,
 785       &glCopyTexImage1D,
 786       &glCopyTexImage2D,
 787       &glCopyTexSubImage1D,
 788       &glCopyTexSubImage2D,
 789       &glDeleteTextures,
 790       &glGenTextures,
 791       &glGetPointerv,
 792       &glIsTexture,
 793       &glPrioritizeTextures,
 794       &glTexSubImage1D,
 795       &glTexSubImage2D,
 796       &glPopClientAttrib,
 797       &glPushClientAttrib
 798    }
 799 };
 800
 801 PGLCLTPROCTABLE APIENTRY
 802 DrvSetContext(
 803    HDC hdc,
 804    DHGLRC dhglrc,
 805    PFN_SETPROCTABLE pfnSetProcTable )
 806 {
 807    PGLCLTPROCTABLE r = (PGLCLTPROCTABLE)&cpt;
 808
 809    if (!stw_make_current( hdc, dhglrc ))
 810       r = NULL;
 811
 812    return r;
 813 }