src/mesa/drivers/dri/tdfx/tdfx_context.c

   1 /* -*- mode: c; c-basic-offset: 3 -*-
   2  *
   3  * Copyright 2000 VA Linux Systems Inc., Fremont, California.
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26 /* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_context.c,v 1.12 2003/05/08 09:25:35 herrb Exp $ */
  27
  28 /*
  29  * New fixes:
  30  *      Daniel Borca <dborca@users.sourceforge.net>, 19 Jul 2004
  31  *
  32  * Original rewrite:
  33  *      Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
  34  *
  35  * Authors:
  36  *      Gareth Hughes <gareth@valinux.com>
  37  *      Brian Paul <brianp@valinux.com>
  38  *
  39  */
  40
  41 #include <dlfcn.h>
  42 #include "tdfx_context.h"
  43 #include "tdfx_dd.h"
  44 #include "tdfx_state.h"
  45 #include "tdfx_vb.h"
  46 #include "tdfx_tex.h"
  47 #include "tdfx_tris.h"
  48 #include "tdfx_render.h"
  49 #include "tdfx_span.h"
  50 #include "tdfx_texman.h"
  51 #include "extensions.h"
  52
  53 #include "swrast/swrast.h"
  54 #include "swrast_setup/swrast_setup.h"
  55 #include "array_cache/acache.h"
  56
  57 #include "tnl/tnl.h"
  58 #include "tnl/t_pipeline.h"
  59
  60 #include "drivers/common/driverfuncs.h"
  61
  62 #include "utils.h"
  63
  64 const char __driConfigOptions[] = { 0 };
  65 const GLuint __driNConfigOptions = 0;
  66
  67 /**
  68  * Common extension strings exported by all cards
  69  */
  70 static const char * const card_extensions[] =
  71 {
  72    "GL_ARB_texture_mirrored_repeat",
  73    "GL_ARB_vertex_buffer_object",
  74    "GL_EXT_blend_func_separate",
  75    "GL_EXT_fog_coord",
  76    "GL_EXT_multi_draw_arrays",
  77    "GL_EXT_paletted_texture",
  78    "GL_EXT_shared_texture_palette",
  79    "GL_EXT_stencil_wrap",
  80    "GL_EXT_texture_env_add",
  81    "GL_EXT_texture_lod_bias",
  82    "GL_HP_occlusion_test",
  83    "GL_IBM_multimode_draw_arrays",
  84
  85 #if 0
  86    "GL_ARB_point_sprite",
  87    "GL_EXT_point_parameters",
  88    "GL_EXT_secondary_color",
  89 #endif
  90 #if 0
  91    /* not just yet */
  92    "GL_ARB_vertex_program",
  93    "GL_NV_vertex_program",
  94    "GL_NV_vertex_program1_1",
  95    "GL_MESA_program_debug",
  96 #endif
  97    NULL
  98 };
  99
 100 /**
 101  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 102  */
 103 static const char * const napalm_extensions[] =
 104 {
 105    "GL_ARB_texture_compression",
 106    "GL_ARB_texture_env_combine",
 107    "GL_EXT_blend_equation_separate",
 108    "GL_EXT_blend_subtract",
 109    "GL_EXT_texture_compression_s3tc",
 110    "GL_EXT_texture_env_combine",
 111
 112    "GL_3DFX_texture_compression_FXT1",
 113    "GL_NV_blend_square",
 114    "GL_S3_s3tc",
 115    NULL
 116 };
 117
 118 /*
 119  * Enable/Disable the extensions for this context.
 120  */
 121 static void tdfxDDInitExtensions( GLcontext *ctx )
 122 {
 123    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 124
 125    driInitExtensions( ctx, card_extensions, GL_FALSE );
 126
 127    if ( fxMesa->haveTwoTMUs ) {
 128       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 129    }
 130
 131    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 132       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 133    } else {
 134       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 135    }
 136 }
 137
 138
 139
 140 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 141    &_tnl_vertex_transform_stage,
 142    &_tnl_normal_transform_stage,
 143    &_tnl_lighting_stage,
 144    &_tnl_fog_coordinate_stage,
 145    &_tnl_texgen_stage,
 146    &_tnl_texture_transform_stage,
 147    &_tnl_point_attenuation_stage,
 148 #if 0
 149 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program)
 150    &_tnl_vertex_program_stage,
 151 #endif
 152 #endif
 153    &_tnl_render_stage,
 154    0,
 155 };
 156
 157
 158 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 159                              __DRIcontextPrivate *driContextPriv,
 160                              void *sharedContextPrivate )
 161 {
 162    tdfxContextPtr fxMesa;
 163    GLcontext *ctx, *shareCtx;
 164    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 165    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 166    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 167                                               sizeof(drm_sarea_t));
 168    struct dd_function_table functions;
 169
 170    /* Allocate tdfx context */
 171    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 172    if (!fxMesa)
 173       return GL_FALSE;
 174
 175    /* Init default driver functions then plug in our tdfx-specific functions
 176     * (the texture functions are especially important)
 177     */
 178    _mesa_init_driver_functions(&functions);
 179    tdfxDDInitDriverFuncs(mesaVis, &functions);
 180    tdfxInitTextureFuncs(&functions);
 181    tdfxInitRenderFuncs(&functions);
 182
 183    /* Allocate the Mesa context */
 184    if (sharedContextPrivate)
 185       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 186    else
 187       shareCtx = NULL;
 188
 189    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 190                                         &functions, (void *) fxMesa);
 191    if (!fxMesa->glCtx) {
 192       FREE(fxMesa);
 193       return GL_FALSE;
 194    }
 195    driContextPriv->driverPrivate = fxMesa;
 196
 197    /* Mirror some important DRI state
 198     */
 199    fxMesa->hHWContext = driContextPriv->hHWContext;
 200    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 201    fxMesa->driFd = sPriv->fd;
 202
 203    fxMesa->driScreen = sPriv;
 204    fxMesa->driContext = driContextPriv;
 205    fxMesa->fxScreen = fxScreen;
 206    fxMesa->sarea = saPriv;
 207
 208    /*JJJ - really?*/
 209    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 210                            ((mesaVis->greenBits == 8) ||
 211                             (mesaVis->depthBits == 0)) );
 212    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 213                              mesaVis->stencilBits &&
 214                              mesaVis->depthBits == 24 );
 215
 216    fxMesa->screen_width = fxScreen->width;
 217    fxMesa->screen_height = fxScreen->height;
 218
 219    fxMesa->new_gl_state = ~0;
 220    fxMesa->new_state = ~0;
 221    fxMesa->dirty = ~0;
 222
 223    /* NOTE: This must be here before any Glide calls! */
 224    if (!tdfxInitGlide( fxMesa )) {
 225       FREE(fxMesa);
 226       return GL_FALSE;
 227    }
 228
 229    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 230               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 231               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 232               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 233               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 234               &saPriv->fifoRead );
 235
 236    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 237       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 238    } else {
 239       fxMesa->Glide.SwapInterval = 0;
 240    }
 241    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 242       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 243    } else {
 244       fxMesa->Glide.MaxPendingSwaps = 2;
 245    }
 246
 247    fxMesa->Glide.Initialized = GL_FALSE;
 248    fxMesa->Glide.Board = 0;
 249
 250
 251    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 252       fxMesa->haveTwoTMUs = GL_FALSE;
 253    }
 254    else {
 255       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 256          fxMesa->haveTwoTMUs = GL_FALSE;
 257       } else {
 258          fxMesa->haveTwoTMUs = GL_TRUE;
 259       }
 260    }
 261
 262    fxMesa->stats.swapBuffer = 0;
 263    fxMesa->stats.reqTexUpload = 0;
 264    fxMesa->stats.texUpload = 0;
 265    fxMesa->stats.memTexUpload = 0;
 266
 267    fxMesa->tmuSrc = TDFX_TMU_NONE;
 268
 269    ctx = fxMesa->glCtx;
 270    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 271       ctx->Const.MaxTextureLevels = 12;
 272    } else {
 273       ctx->Const.MaxTextureLevels = 9;
 274    }
 275    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 276    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 277    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 278
 279    /* No wide points.
 280     */
 281    ctx->Const.MinPointSize = 1.0;
 282    ctx->Const.MinPointSizeAA = 1.0;
 283    ctx->Const.MaxPointSize = 1.0;
 284    ctx->Const.MaxPointSizeAA = 1.0;
 285
 286    /* Disable wide lines as we can't antialias them correctly in
 287     * hardware.
 288     */
 289    ctx->Const.MinLineWidth = 1.0;
 290    ctx->Const.MinLineWidthAA = 1.0;
 291    ctx->Const.MaxLineWidth = 1.0;
 292    ctx->Const.MaxLineWidthAA = 1.0;
 293    ctx->Const.LineWidthGranularity = 1.0;
 294
 295    /* Initialize the software rasterizer and helper modules.
 296     */
 297    _swrast_CreateContext( ctx );
 298    _ac_CreateContext( ctx );
 299    _tnl_CreateContext( ctx );
 300    _swsetup_CreateContext( ctx );
 301
 302    /* Install the customized pipeline:
 303     */
 304    _tnl_destroy_pipeline( ctx );
 305    _tnl_install_pipeline( ctx, tdfx_pipeline );
 306
 307    /* Configure swrast and T&L to match hardware characteristics:
 308     */
 309    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 310    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 311    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 312    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 313
 314    tdfxDDInitExtensions( ctx );
 315    /* XXX these should really go right after _mesa_init_driver_functions() */
 316    tdfxDDInitSpanFuncs( ctx );
 317    tdfxDDInitStateFuncs( ctx );
 318    tdfxDDInitTriFuncs( ctx );
 319    tdfxInitVB( ctx );
 320    tdfxInitState( fxMesa );
 321
 322    return GL_TRUE;
 323 }
 324
 325
 326 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 327 {
 328    FxI32 result;
 329    int i;
 330
 331    LOCK_HARDWARE( fxMesa );
 332
 333    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 334    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 335       fxMesa->layout[i] = MALLOC( result );
 336       if ( !fxMesa->layout[i] ) {
 337          UNLOCK_HARDWARE( fxMesa );
 338          return GL_FALSE;
 339       }
 340    }
 341
 342    /* Tiny vertex format - 16 bytes.
 343     */
 344    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 345    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 346    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 347    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 348    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 349    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 350
 351    /* Non textured vertex format - 24 bytes (Need w for table fog)
 352     */
 353    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 354    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 355    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 356    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 357    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 358    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 359    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 360
 361    /* Single textured vertex format - 32 bytes.
 362     */
 363    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 364    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 365    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 366    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 367    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 368    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 369    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 370    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 371
 372    /* Multitextured vertex format - 40 bytes.
 373     */
 374    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 375    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 376    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 377    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 378    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 379    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 380    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 381    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 382    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 383
 384    /* Projected texture vertex format - 36 bytes.
 385     */
 386    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 387    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 388    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 389    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 390    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 391    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 392    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 393    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 394    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 395
 396    /* Projected multitexture vertex format - 48 bytes.
 397     */
 398    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 399    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 403    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 404    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 405    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 406    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 407    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 408    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 409
 410    UNLOCK_HARDWARE( fxMesa );
 411
 412    return GL_TRUE;
 413 }
 414
 415
 416 /*
 417  * Initialize the state in an tdfxContextPtr struct.
 418  */
 419 static GLboolean
 420 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 421 {
 422    /* KW: Would be nice to make one of these a member of the other.
 423     */
 424    FxI32 result[2];
 425    const char *gext;
 426
 427    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 428       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 429    }
 430
 431 #if DEBUG_LOCKING
 432    fprintf(stderr, "Debug locking enabled\n");
 433 #endif
 434
 435    if ( fxMesa->Glide.Initialized )
 436       return GL_TRUE;
 437
 438    fxMesa->width = driDrawPriv->w;
 439    fxMesa->height = driDrawPriv->h;
 440
 441    /* We have to use a light lock here, because we can't do any glide
 442     * operations yet. No use of FX_* functions in this function.
 443     */
 444    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 445
 446    fxMesa->Glide.grGlideInit();
 447    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 448
 449    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 450                                          GR_RESOLUTION_NONE,
 451                                          GR_REFRESH_NONE,
 452                                          fxMesa->Glide.ColorFormat,
 453                                          fxMesa->Glide.Origin,
 454                                          2, 1 );
 455
 456    fxMesa->Glide.grDRIResetSAREA();
 457
 458    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 459
 460    if ( !fxMesa->Glide.Context )
 461       return GL_FALSE;
 462
 463
 464    /* Perform the Glide-dependant part of the context initialization.
 465     */
 466    FX_grColorMaskv( fxMesa->glCtx, true4 );
 467
 468    tdfxTMInit( fxMesa );
 469
 470    LOCK_HARDWARE( fxMesa );
 471
 472    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 473    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 474    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 475    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 476    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 477    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 478    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 479    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 480    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 481    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 482    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 483
 484    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 485       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 486    } else {
 487       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 488    }
 489
 490    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 491
 492    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 493    fxMesa->Glide.TextureAlign = result[0];
 494
 495    fxMesa->Glide.State = NULL;
 496    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 497    fxMesa->Glide.State = MALLOC( result[0] );
 498
 499    fxMesa->Fog.Table = NULL;
 500    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 501    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 502
 503    UNLOCK_HARDWARE( fxMesa );
 504
 505    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 506       if ( fxMesa->Glide.State )
 507          FREE( fxMesa->Glide.State );
 508       if ( fxMesa->Fog.Table )
 509          FREE( fxMesa->Fog.Table );
 510       return GL_FALSE;
 511    }
 512
 513    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 514       return GL_FALSE;
 515    }
 516
 517    LOCK_HARDWARE( fxMesa );
 518
 519    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 520
 521    if ( getenv( "FX_GLIDE_INFO" ) ) {
 522       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 523       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 524       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 525       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 526       printf( "GR_EXTENSION = %s\n", (char *) gext );
 527    }
 528
 529    UNLOCK_HARDWARE( fxMesa );
 530
 531    {
 532       const char *debug = getenv("LIBGL_DEBUG");
 533       if (debug && strstr(debug, "fallbacks")) {
 534          fxMesa->debugFallbacks = GL_TRUE;
 535       }
 536    }
 537
 538
 539    fxMesa->numClipRects = 0;
 540    fxMesa->pClipRects = NULL;
 541    fxMesa->scissoredClipRects = GL_FALSE;
 542
 543    fxMesa->Glide.Initialized = GL_TRUE;
 544
 545    return GL_TRUE;
 546 }
 547
 548
 549 void
 550 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 551 {
 552    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 553
 554    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 555       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 556    }
 557
 558    if ( fxMesa ) {
 559       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 560          /* This share group is about to go away, free our private
 561           * texture object data.
 562           */
 563          struct gl_texture_object *tObj;
 564          tObj = fxMesa->glCtx->Shared->TexObjectList;
 565          while (tObj) {
 566             tdfxTMFreeTexture(fxMesa, tObj);
 567             tObj = tObj->Next;
 568          }
 569       }
 570
 571       tdfxTMClose(fxMesa);  /* free texture memory */
 572
 573       _swsetup_DestroyContext( fxMesa->glCtx );
 574       _tnl_DestroyContext( fxMesa->glCtx );
 575       _ac_DestroyContext( fxMesa->glCtx );
 576       _swrast_DestroyContext( fxMesa->glCtx );
 577
 578       tdfxFreeVB( fxMesa->glCtx );
 579
 580       /* Free Mesa context */
 581       fxMesa->glCtx->DriverCtx = NULL;
 582       _mesa_destroy_context(fxMesa->glCtx);
 583
 584       /* free the tdfx context */
 585       FREE( fxMesa );
 586    }
 587 }
 588
 589
 590 GLboolean
 591 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 592 {
 593    GET_CURRENT_CONTEXT(ctx);
 594    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 595
 596    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 597       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 598    }
 599
 600    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 601       LOCK_HARDWARE(fxMesa);
 602       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 603       UNLOCK_HARDWARE(fxMesa);
 604    }
 605    return GL_TRUE;
 606 }
 607
 608
 609 GLboolean
 610 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 611                  __DRIdrawablePrivate *driDrawPriv,
 612                  __DRIdrawablePrivate *driReadPriv )
 613 {
 614    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 615       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 616    }
 617
 618    if ( driContextPriv ) {
 619       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 620       GLcontext *newCtx = newFx->glCtx;
 621       GET_CURRENT_CONTEXT(curCtx);
 622
 623       if ( newFx->driDrawable != driDrawPriv ) {
 624          newFx->driDrawable = driDrawPriv;
 625          newFx->dirty = ~0;
 626       }
 627       else {
 628          if (curCtx == newCtx) {
 629             /* same drawable, same context -> no-op */
 630             /* Need to call _mesa_make_current2() in order to make sure API
 631              * dispatch is set correctly.
 632              */
 633             _mesa_make_current2( newCtx,
 634                                  (GLframebuffer *) driDrawPriv->driverPrivate,
 635                                  (GLframebuffer *) driReadPriv->driverPrivate );
 636             return GL_TRUE;
 637          }
 638          /* [dBorca] tunnel2 requires this */
 639          newFx->dirty = ~0;
 640       }
 641
 642       if ( !newFx->Glide.Initialized ) {
 643          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 644             return GL_FALSE;
 645
 646          LOCK_HARDWARE( newFx );
 647
 648          /* FIXME: Force loading of window information */
 649          newFx->width = 0;
 650          tdfxUpdateClipping(newCtx);
 651          tdfxUploadClipping(newFx);
 652
 653          UNLOCK_HARDWARE( newFx );
 654       } else {
 655          LOCK_HARDWARE( newFx );
 656
 657          newFx->Glide.grSstSelect( newFx->Glide.Board );
 658          newFx->Glide.grGlideSetState( newFx->Glide.State );
 659
 660          tdfxUpdateClipping(newCtx);
 661          tdfxUploadClipping(newFx);
 662
 663          UNLOCK_HARDWARE( newFx );
 664       }
 665
 666       _mesa_make_current2( newCtx,
 667                            (GLframebuffer *) driDrawPriv->driverPrivate,
 668                            (GLframebuffer *) driReadPriv->driverPrivate );
 669    } else {
 670       _mesa_make_current( 0, 0 );
 671    }
 672
 673    return GL_TRUE;
 674 }
 675
 676
 677 /*
 678  * Enable this to trace calls to various Glide functions.
 679  */
 680 /*#define DEBUG_TRAP*/
 681 #ifdef DEBUG_TRAP
 682 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 683 static void (*real_grDrawPoint)( const void *a );
 684 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 685 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 686                                        void *pointers, FxU32 stride);
 687 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 688
 689 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 690 static void (*real_grGlideGetVertexLayout)( void *layout );
 691 static void (*real_grGlideSetVertexLayout)( const void *layout );
 692
 693 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 694                                      FxU32             startAddress,
 695                                      GrLOD_t           thisLod,
 696                                      GrLOD_t           largeLod,
 697                                      GrAspectRatio_t   aspectRatio,
 698                                      GrTextureFormat_t format,
 699                                      FxU32             evenOdd,
 700                                               void              *data );
 701
 702
 703 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 704 {
 705    printf("%s\n", __FUNCTION__);
 706    (*real_grDrawTriangle)(a, b, c);
 707 }
 708
 709 static void debug_grDrawPoint( const void *a )
 710 {
 711    const float *f = (const float *) a;
 712    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 713    (*real_grDrawPoint)(a);
 714 }
 715
 716 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 717 {
 718    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 719    (*real_grDrawVertexArray)(mode, Count, pointers);
 720 }
 721
 722 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 723                                        void *pointers, FxU32 stride)
 724 {
 725    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 726    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 727 }
 728
 729 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 730 {
 731    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 732           (int) minx, (int) miny, (int) maxx, (int) maxy);
 733    (*real_grClipWindow)(minx, miny, maxx, maxy);
 734 }
 735
 736 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 737 {
 738    (*real_grVertexLayout)(param, offset, mode);
 739 }
 740
 741 static void debug_grGlideGetVertexLayout( void *layout )
 742 {
 743    (*real_grGlideGetVertexLayout)(layout);
 744 }
 745
 746 static void debug_grGlideSetVertexLayout( const void *layout )
 747 {
 748    (*real_grGlideSetVertexLayout)(layout);
 749 }
 750
 751 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 752                                      FxU32             startAddress,
 753                                      GrLOD_t           thisLod,
 754                                      GrLOD_t           largeLod,
 755                                      GrAspectRatio_t   aspectRatio,
 756                                      GrTextureFormat_t format,
 757                                      FxU32             evenOdd,
 758                                      void              *data )
 759 {
 760    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 761                                     aspectRatio, format, evenOdd, data);
 762 }
 763
 764 #endif
 765
 766
 767 /*
 768  * Examine the context's deviceID to determine what kind of 3dfx hardware
 769  * is installed.  dlopen() the appropriate Glide library and initialize
 770  * this context's Glide function pointers.
 771  * Return:  true/false = success/failure
 772  */
 773 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 774 {
 775    static const char *defaultGlide = "libglide3.so";
 776    const char *libName;
 777    void *libHandle;
 778
 779    /*
 780     * XXX this code which selects a Glide library filename given the
 781     * deviceID may need to be cleaned up a bit.
 782     * Non-Linux systems may have different filenames, for example.
 783     */
 784    switch (tmesa->fxScreen->deviceID) {
 785    case PCI_CHIP_BANSHEE:
 786    case PCI_CHIP_VOODOO3:
 787       libName = "libglide3-v3.so";
 788       break;
 789    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 790       libName = "libglide3-v5.so";
 791       break;
 792    default:
 793       {
 794          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 795                  tmesa->fxScreen->deviceID);
 796       }
 797       return GL_FALSE;
 798    }
 799
 800    libHandle = dlopen(libName, RTLD_NOW);
 801    if (!libHandle) {
 802       /* The device-specific Glide library filename didn't work, try the
 803        * old, generic libglide3.so library.
 804        */
 805       libHandle = dlopen(defaultGlide, RTLD_NOW);
 806       if (!libHandle) {
 807          __driUtilMessage(
 808             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 809             libName, defaultGlide);
 810          __driUtilMessage("dlerror() message: %s", dlerror());
 811          return GL_FALSE;
 812       }
 813       libName = defaultGlide;
 814    }
 815
 816    {
 817       const char *env = getenv("LIBGL_DEBUG");
 818       if (env && strstr(env, "verbose")) {
 819          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 820       }
 821    }
 822
 823 #define GET_FUNCTION(PTR, NAME)                                         \
 824    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 825    if (!tmesa->Glide.PTR) {                                             \
 826       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 827               NAME, libName);                                           \
 828    }
 829
 830    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 831    GET_FUNCTION(grDrawLine, "grDrawLine");
 832    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 833    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 834    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 835    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 836    GET_FUNCTION(grBufferClear, "grBufferClear");
 837    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 838    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 839    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 840    GET_FUNCTION(grFinish, "grFinish");
 841    GET_FUNCTION(grFlush, "grFlush");
 842    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 843    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 844 #if 0
 845    /* Not in V3 lib, and not used anyway. */
 846    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 847 #endif
 848    GET_FUNCTION(grSelectContext, "grSelectContext");
 849    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 850    GET_FUNCTION(grSstSelect, "grSstSelect");
 851    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 852    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 853    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 854    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 855    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 856    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 857    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 858    GET_FUNCTION(grClipWindow, "grClipWindow");
 859    GET_FUNCTION(grColorCombine, "grColorCombine");
 860    GET_FUNCTION(grColorMask, "grColorMask");
 861    GET_FUNCTION(grCullMode, "grCullMode");
 862    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 863    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 864    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 865    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 866    GET_FUNCTION(grDepthMask, "grDepthMask");
 867    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 868    GET_FUNCTION(grDitherMode, "grDitherMode");
 869    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 870    GET_FUNCTION(grFogMode, "grFogMode");
 871    GET_FUNCTION(grFogTable, "grFogTable");
 872    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 873    GET_FUNCTION(grSplash, "grSplash");
 874    GET_FUNCTION(grGet, "grGet");
 875    GET_FUNCTION(grGetString, "grGetString");
 876    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 877    GET_FUNCTION(grReset, "grReset");
 878    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 879    GET_FUNCTION(grEnable, "grEnable");
 880    GET_FUNCTION(grDisable, "grDisable");
 881    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 882    GET_FUNCTION(grDepthRange, "grDepthRange");
 883    GET_FUNCTION(grStippleMode, "grStippleMode");
 884    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 885    GET_FUNCTION(grViewport, "grViewport");
 886    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 887    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 888    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 889    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 890    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 891    GET_FUNCTION(grTexSource, "grTexSource");
 892    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 893    GET_FUNCTION(grTexCombine, "grTexCombine");
 894    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 895    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 896    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 897    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 898    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 899    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 900    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 901    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 902    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 903    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 904    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 905    GET_FUNCTION(grLfbLock, "grLfbLock");
 906    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 907    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 908    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 909    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 910    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 911    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 912    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 913    GET_FUNCTION(grGlideInit, "grGlideInit");
 914    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 915    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 916    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 917    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 918    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 919
 920    /* Glide utility functions */
 921    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 922    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 923    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 924
 925    /* DRI functions */
 926    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 927    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 928    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 929    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 930    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 931    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 932    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 933
 934    /*
 935     * Extension functions:
 936     * Just use dlysm() because we want a NULL pointer if the function is
 937     * not found.
 938     */
 939    /* PIXEXT extension */
 940    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 941    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 942    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 943    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 944    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 945    /* COMBINE extension */
 946    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 947    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 948    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 949    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 950    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 951    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 952    /* Texus 2 */
 953    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 954    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 955    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 956
 957 #ifdef DEBUG_TRAP
 958    /* wrap the drawing functions so we can trap them */
 959    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 960    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 961
 962    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 963    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
 964
 965    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
 966    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
 967
 968    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
 969    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
 970
 971    real_grClipWindow = tmesa->Glide.grClipWindow;
 972    tmesa->Glide.grClipWindow = debug_grClipWindow;
 973
 974    real_grVertexLayout = tmesa->Glide.grVertexLayout;
 975    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
 976
 977    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
 978    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
 979
 980    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
 981    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
 982
 983    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
 984    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
 985
 986 #endif
 987    return GL_TRUE;
 988 }