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
  27 /**
  28  * \file tdfx_context.c
  29  * Context management functions for 3Dfx hardware.
  30  *
  31  * \author Gareth Hughes <gareth@valinux.com> (original rewrite 29 Sep - 1 Oct 2000)
  32  * \author Brian Paul <brianp@valinux.com>
  33  * \author Daniel Borca <dborca@users.sourceforge.net> (new fixes 19 Jul 2004)
  34  */
  35
  36 #include <dlfcn.h>
  37 #include "tdfx_context.h"
  38 #include "tdfx_dd.h"
  39 #include "tdfx_state.h"
  40 #include "tdfx_vb.h"
  41 #include "tdfx_tex.h"
  42 #include "tdfx_tris.h"
  43 #include "tdfx_render.h"
  44 #include "tdfx_span.h"
  45 #include "tdfx_texman.h"
  46 #include "main/extensions.h"
  47 #include "main/hash.h"
  48 #include "main/texobj.h"
  49
  50 #include "swrast/swrast.h"
  51 #include "swrast_setup/swrast_setup.h"
  52 #include "vbo/vbo.h"
  53
  54 #include "tnl/tnl.h"
  55 #include "tnl/t_pipeline.h"
  56
  57 #include "drivers/common/driverfuncs.h"
  58
  59 #include "utils.h"
  60
  61 /* #define need_GL_ARB_point_parameters */
  62 #define need_GL_ARB_occlusion_query
  63 /* #define need_GL_ARB_vertex_program */
  64 #define need_GL_EXT_blend_equation_separate
  65 #define need_GL_EXT_blend_func_separate
  66 #define need_GL_EXT_blend_minmax
  67 #define need_GL_EXT_fog_coord
  68 #define need_GL_EXT_paletted_texture
  69 /* #define need_GL_EXT_secondary_color */
  70 /* #define need_GL_NV_vertex_program */
  71 #include "main/remap_helper.h"
  72
  73
  74 /**
  75  * Common extension strings exported by all cards
  76  */
  77 static const struct dri_extension card_extensions[] =
  78 {
  79     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
  80     { "GL_ARB_texture_mirrored_repeat",    NULL },
  81
  82     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  83     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  84     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  85     { "GL_EXT_shared_texture_palette",     NULL },
  86     { "GL_EXT_stencil_wrap",               NULL },
  87     { "GL_EXT_texture_env_add",            NULL },
  88     { "GL_EXT_texture_lod_bias",           NULL },
  89
  90 #ifdef need_GL_ARB_point_parameters
  91     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
  92     { "GL_ARB_point_sprite",               NULL },
  93 #endif
  94 #ifdef need_GL_EXT_secondary_color
  95     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
  96 #endif
  97 #ifdef need_GL_ARB_vertex_program
  98     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
  99 #endif
 100 #ifdef need_GL_NV_vertex_program
 101     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 102     { "GL_NV_vertex_program1_1",           NULL },
 103 #endif
 104     { NULL,                                NULL }
 105 };
 106
 107 /**
 108  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 109  */
 110 static const struct dri_extension napalm_extensions[] =
 111 {
 112     { "GL_ARB_texture_env_combine",        NULL },
 113     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 114     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 115     { "GL_EXT_texture_compression_s3tc",   NULL },
 116     { "GL_EXT_texture_env_combine",        NULL },
 117
 118     { "GL_3DFX_texture_compression_FXT1",  NULL },
 119     { "GL_NV_blend_square",                NULL },
 120     { "GL_S3_s3tc",                        NULL },
 121     { NULL,                                NULL }
 122 };
 123
 124 /*
 125  * Enable/Disable the extensions for this context.
 126  */
 127 static void tdfxDDInitExtensions( GLcontext *ctx )
 128 {
 129    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 130
 131    driInitExtensions( ctx, card_extensions, GL_FALSE );
 132
 133    if ( fxMesa->haveTwoTMUs ) {
 134       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 135    }
 136
 137    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 138       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 139    } else {
 140       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 141    }
 142 }
 143
 144
 145
 146 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 147    &_tnl_vertex_transform_stage,
 148    &_tnl_normal_transform_stage,
 149    &_tnl_lighting_stage,
 150    &_tnl_fog_coordinate_stage,
 151    &_tnl_texgen_stage,
 152    &_tnl_texture_transform_stage,
 153    &_tnl_point_attenuation_stage,
 154    &_tnl_render_stage,
 155    0,
 156 };
 157
 158 static const struct dri_debug_control debug_control[] =
 159 {
 160     { "dri",   DEBUG_VERBOSE_DRI },
 161     { "sync",  DEBUG_ALWAYS_SYNC },
 162     { "api",   DEBUG_VERBOSE_API },
 163     { "fall",  DEBUG_VERBOSE_FALL },
 164     { NULL,    0 }
 165 };
 166
 167 GLboolean tdfxCreateContext( gl_api api,
 168                              const __GLcontextModes *mesaVis,
 169                              __DRIcontext *driContextPriv,
 170                              void *sharedContextPrivate )
 171 {
 172    tdfxContextPtr fxMesa;
 173    GLcontext *ctx, *shareCtx;
 174    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 175    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 176    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 177                                               sizeof(drm_sarea_t));
 178    struct dd_function_table functions;
 179
 180    /* Allocate tdfx context */
 181    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 182    if (!fxMesa)
 183       return GL_FALSE;
 184
 185    /* Init default driver functions then plug in our tdfx-specific functions
 186     * (the texture functions are especially important)
 187     */
 188    _mesa_init_driver_functions(&functions);
 189    tdfxDDInitDriverFuncs(mesaVis, &functions);
 190    tdfxInitTextureFuncs(&functions);
 191    tdfxInitRenderFuncs(&functions);
 192
 193    /* Allocate the Mesa context */
 194    if (sharedContextPrivate)
 195       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 196    else
 197       shareCtx = NULL;
 198
 199    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 200                                         &functions, (void *) fxMesa);
 201    if (!fxMesa->glCtx) {
 202       FREE(fxMesa);
 203       return GL_FALSE;
 204    }
 205    driContextPriv->driverPrivate = fxMesa;
 206
 207    /* Mirror some important DRI state
 208     */
 209    fxMesa->hHWContext = driContextPriv->hHWContext;
 210    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 211    fxMesa->driFd = sPriv->fd;
 212
 213    fxMesa->driScreen = sPriv;
 214    fxMesa->driContext = driContextPriv;
 215    fxMesa->fxScreen = fxScreen;
 216    fxMesa->sarea = saPriv;
 217
 218    /*JJJ - really?*/
 219    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 220                            ((mesaVis->greenBits == 8) ||
 221                             (mesaVis->depthBits == 0)) );
 222    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 223                              mesaVis->stencilBits &&
 224                              mesaVis->depthBits == 24 );
 225
 226    fxMesa->screen_width = fxScreen->width;
 227    fxMesa->screen_height = fxScreen->height;
 228
 229    fxMesa->new_gl_state = ~0;
 230    fxMesa->new_state = ~0;
 231    fxMesa->dirty = ~0;
 232
 233    /* Parse configuration files */
 234    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 235                         fxMesa->driScreen->myNum, "tdfx");
 236
 237    /* NOTE: This must be here before any Glide calls! */
 238    if (!tdfxInitGlide( fxMesa )) {
 239       FREE(fxMesa);
 240       return GL_FALSE;
 241    }
 242
 243    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 244               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 245               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 246               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 247               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 248               &saPriv->fifoRead );
 249
 250    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 251       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 252    } else {
 253       fxMesa->Glide.SwapInterval = 0;
 254    }
 255    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 256       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 257    } else {
 258       fxMesa->Glide.MaxPendingSwaps = 2;
 259    }
 260
 261    fxMesa->Glide.Initialized = GL_FALSE;
 262    fxMesa->Glide.Board = 0;
 263
 264
 265    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 266       fxMesa->haveTwoTMUs = GL_FALSE;
 267    }
 268    else {
 269       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 270          fxMesa->haveTwoTMUs = GL_FALSE;
 271       } else {
 272          fxMesa->haveTwoTMUs = GL_TRUE;
 273       }
 274    }
 275
 276    fxMesa->stats.swapBuffer = 0;
 277    fxMesa->stats.reqTexUpload = 0;
 278    fxMesa->stats.texUpload = 0;
 279    fxMesa->stats.memTexUpload = 0;
 280
 281    fxMesa->tmuSrc = TDFX_TMU_NONE;
 282
 283    ctx = fxMesa->glCtx;
 284    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 285       ctx->Const.MaxTextureLevels = 12;
 286    } else {
 287       ctx->Const.MaxTextureLevels = 9;
 288    }
 289    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 290    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 291    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 292
 293    /* No wide points.
 294     */
 295    ctx->Const.MinPointSize = 1.0;
 296    ctx->Const.MinPointSizeAA = 1.0;
 297    ctx->Const.MaxPointSize = 1.0;
 298    ctx->Const.MaxPointSizeAA = 1.0;
 299
 300    /* Disable wide lines as we can't antialias them correctly in
 301     * hardware.
 302     */
 303    ctx->Const.MinLineWidth = 1.0;
 304    ctx->Const.MinLineWidthAA = 1.0;
 305    ctx->Const.MaxLineWidth = 1.0;
 306    ctx->Const.MaxLineWidthAA = 1.0;
 307    ctx->Const.LineWidthGranularity = 1.0;
 308
 309    ctx->Const.MaxDrawBuffers = 1;
 310
 311    /* Initialize the software rasterizer and helper modules.
 312     */
 313    _swrast_CreateContext( ctx );
 314    _vbo_CreateContext( ctx );
 315    _tnl_CreateContext( ctx );
 316    _swsetup_CreateContext( ctx );
 317
 318    /* Install the customized pipeline:
 319     */
 320    _tnl_destroy_pipeline( ctx );
 321    _tnl_install_pipeline( ctx, tdfx_pipeline );
 322
 323    /* Configure swrast and T&L to match hardware characteristics:
 324     */
 325    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 326    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 327    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 328    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 329
 330    tdfxDDInitExtensions( ctx );
 331    /* XXX these should really go right after _mesa_init_driver_functions() */
 332    tdfxDDInitSpanFuncs( ctx );
 333    tdfxDDInitStateFuncs( ctx );
 334    tdfxDDInitTriFuncs( ctx );
 335    tdfxInitVB( ctx );
 336    tdfxInitState( fxMesa );
 337
 338 #if DO_DEBUG
 339    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 340 #endif
 341
 342    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 343       fprintf(stderr, "disabling 3D acceleration\n");
 344       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 345    }
 346
 347    return GL_TRUE;
 348 }
 349
 350
 351 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 352 {
 353    FxI32 result;
 354    int i;
 355
 356    LOCK_HARDWARE( fxMesa );
 357
 358    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 359    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 360       fxMesa->layout[i] = MALLOC( result );
 361       if ( !fxMesa->layout[i] ) {
 362          UNLOCK_HARDWARE( fxMesa );
 363          return GL_FALSE;
 364       }
 365    }
 366
 367    /* Tiny vertex format - 16 bytes.
 368     */
 369    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 370    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 371    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 372    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 373    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 374    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 375
 376    /* Non textured vertex format - 24 bytes (Need w for table fog)
 377     */
 378    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 379    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 380    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 381    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 382    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 383    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 384    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 385
 386    /* Single textured vertex format - 32 bytes.
 387     */
 388    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 389    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 390    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 391    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 392    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 393    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 394    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 395    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 396
 397    /* Multitextured vertex format - 40 bytes.
 398     */
 399    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 400    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 403    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 404    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 405    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 406    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 407    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 408
 409    /* Projected texture vertex format - 36 bytes.
 410     */
 411    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 412    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 413    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 414    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 415    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 416    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 417    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 418    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 419    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 420
 421    /* Projected multitexture vertex format - 48 bytes.
 422     */
 423    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 424    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 425    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 426    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 427    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 428    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 429    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 430    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 431    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 432    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 433    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 434
 435    UNLOCK_HARDWARE( fxMesa );
 436
 437    return GL_TRUE;
 438 }
 439
 440
 441 /*
 442  * Initialize the state in an tdfxContextPtr struct.
 443  */
 444 static GLboolean
 445 tdfxInitContext( __DRIdrawable *driDrawPriv, tdfxContextPtr fxMesa )
 446 {
 447    /* KW: Would be nice to make one of these a member of the other.
 448     */
 449    FxI32 result[2];
 450    const char *gext;
 451
 452    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 453       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 454    }
 455
 456 #if DEBUG_LOCKING
 457    fprintf(stderr, "Debug locking enabled\n");
 458 #endif
 459
 460    if ( fxMesa->Glide.Initialized )
 461       return GL_TRUE;
 462
 463    fxMesa->width = driDrawPriv->w;
 464    fxMesa->height = driDrawPriv->h;
 465
 466    /* We have to use a light lock here, because we can't do any glide
 467     * operations yet. No use of FX_* functions in this function.
 468     */
 469    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 470
 471    fxMesa->Glide.grGlideInit();
 472    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 473
 474    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 475                                          GR_RESOLUTION_NONE,
 476                                          GR_REFRESH_NONE,
 477                                          fxMesa->Glide.ColorFormat,
 478                                          fxMesa->Glide.Origin,
 479                                          2, 1 );
 480
 481    fxMesa->Glide.grDRIResetSAREA();
 482
 483    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 484
 485    if ( !fxMesa->Glide.Context )
 486       return GL_FALSE;
 487
 488
 489    /* Perform the Glide-dependant part of the context initialization.
 490     */
 491    FX_grColorMaskv( fxMesa->glCtx, true4 );
 492
 493    tdfxTMInit( fxMesa );
 494
 495    LOCK_HARDWARE( fxMesa );
 496
 497    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 498    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 499    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 500    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 501    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 502    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 503    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 504    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 505    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 506    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 507    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 508
 509    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 510       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 511    } else {
 512       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 513    }
 514
 515    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 516
 517    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 518    fxMesa->Glide.TextureAlign = result[0];
 519
 520    fxMesa->Glide.State = NULL;
 521    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 522    fxMesa->Glide.State = MALLOC( result[0] );
 523
 524    fxMesa->Fog.Table = NULL;
 525    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 526    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 527
 528    UNLOCK_HARDWARE( fxMesa );
 529
 530    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 531       if ( fxMesa->Glide.State )
 532          FREE( fxMesa->Glide.State );
 533       if ( fxMesa->Fog.Table )
 534          FREE( fxMesa->Fog.Table );
 535       return GL_FALSE;
 536    }
 537
 538    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 539       return GL_FALSE;
 540    }
 541
 542    LOCK_HARDWARE( fxMesa );
 543
 544    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 545
 546    if ( getenv( "FX_GLIDE_INFO" ) ) {
 547       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 548       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 549       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 550       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 551       printf( "GR_EXTENSION = %s\n", (char *) gext );
 552    }
 553
 554    UNLOCK_HARDWARE( fxMesa );
 555
 556    fxMesa->numClipRects = 0;
 557    fxMesa->pClipRects = NULL;
 558    fxMesa->scissoredClipRects = GL_FALSE;
 559
 560    fxMesa->Glide.Initialized = GL_TRUE;
 561
 562    return GL_TRUE;
 563 }
 564
 565
 566 void
 567 tdfxDestroyContext( __DRIcontext *driContextPriv )
 568 {
 569    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 570
 571    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 572       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 573    }
 574
 575    if ( fxMesa ) {
 576       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 577          /* This share group is about to go away, free our private
 578           * texture object data.
 579           */
 580          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 581          GLuint id;
 582          for (id = _mesa_HashFirstEntry(textures);
 583               id;
 584               id = _mesa_HashNextEntry(textures, id)) {
 585             struct gl_texture_object *tObj
 586                = _mesa_lookup_texture(fxMesa->glCtx, id);
 587             tdfxTMFreeTexture(fxMesa, tObj);
 588          }
 589       }
 590
 591       tdfxTMClose(fxMesa);  /* free texture memory */
 592
 593       _swsetup_DestroyContext( fxMesa->glCtx );
 594       _tnl_DestroyContext( fxMesa->glCtx );
 595       _vbo_DestroyContext( fxMesa->glCtx );
 596       _swrast_DestroyContext( fxMesa->glCtx );
 597
 598       tdfxFreeVB( fxMesa->glCtx );
 599
 600       /* Free Mesa context */
 601       fxMesa->glCtx->DriverCtx = NULL;
 602       _mesa_destroy_context(fxMesa->glCtx);
 603
 604       /* free the tdfx context */
 605       FREE( fxMesa );
 606    }
 607 }
 608
 609
 610 GLboolean
 611 tdfxUnbindContext( __DRIcontext *driContextPriv )
 612 {
 613    GET_CURRENT_CONTEXT(ctx);
 614    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 615
 616    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 617       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 618    }
 619
 620    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 621       LOCK_HARDWARE(fxMesa);
 622       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 623       UNLOCK_HARDWARE(fxMesa);
 624    }
 625    return GL_TRUE;
 626 }
 627
 628
 629 GLboolean
 630 tdfxMakeCurrent( __DRIcontext *driContextPriv,
 631                  __DRIdrawable *driDrawPriv,
 632                  __DRIdrawable *driReadPriv )
 633 {
 634    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 635       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 636    }
 637
 638    if ( driContextPriv ) {
 639       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 640       GLcontext *newCtx = newFx->glCtx;
 641       GET_CURRENT_CONTEXT(curCtx);
 642
 643       if ((newFx->driDrawable != driDrawPriv)
 644           || (newFx->driReadable != driReadPriv)) {
 645          newFx->driDrawable = driDrawPriv;
 646          newFx->driReadable = driReadPriv;
 647          newFx->dirty = ~0;
 648       }
 649       else {
 650          if (curCtx == newCtx) {
 651             /* same drawable, same context -> no-op */
 652             /* Need to call _mesa_make_current2() in order to make sure API
 653              * dispatch is set correctly.
 654              */
 655             _mesa_make_current( newCtx,
 656                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 657                                 (GLframebuffer *) driReadPriv->driverPrivate );
 658             return GL_TRUE;
 659          }
 660          /* [dBorca] tunnel2 requires this */
 661          newFx->dirty = ~0;
 662       }
 663
 664       driUpdateFramebufferSize(newCtx, driDrawPriv);
 665       if (driDrawPriv != driReadPriv) {
 666          driUpdateFramebufferSize(newCtx, driReadPriv);
 667       }
 668
 669       if ( !newFx->Glide.Initialized ) {
 670          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 671             return GL_FALSE;
 672
 673          LOCK_HARDWARE( newFx );
 674
 675          /* FIXME: Force loading of window information */
 676          newFx->width = 0;
 677          tdfxUpdateClipping(newCtx);
 678          tdfxUploadClipping(newFx);
 679
 680          UNLOCK_HARDWARE( newFx );
 681       } else {
 682          LOCK_HARDWARE( newFx );
 683
 684          newFx->Glide.grSstSelect( newFx->Glide.Board );
 685          newFx->Glide.grGlideSetState( newFx->Glide.State );
 686
 687          tdfxUpdateClipping(newCtx);
 688          tdfxUploadClipping(newFx);
 689
 690          UNLOCK_HARDWARE( newFx );
 691       }
 692
 693       _mesa_make_current( newCtx,
 694                           (GLframebuffer *) driDrawPriv->driverPrivate,
 695                           (GLframebuffer *) driReadPriv->driverPrivate );
 696    } else {
 697       _mesa_make_current( NULL, NULL, NULL );
 698    }
 699
 700    return GL_TRUE;
 701 }
 702
 703
 704 /*
 705  * Enable this to trace calls to various Glide functions.
 706  */
 707 /*#define DEBUG_TRAP*/
 708 #ifdef DEBUG_TRAP
 709 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 710 static void (*real_grDrawPoint)( const void *a );
 711 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 712 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 713                                        void *pointers, FxU32 stride);
 714 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 715
 716 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 717 static void (*real_grGlideGetVertexLayout)( void *layout );
 718 static void (*real_grGlideSetVertexLayout)( const void *layout );
 719
 720 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 721                                      FxU32             startAddress,
 722                                      GrLOD_t           thisLod,
 723                                      GrLOD_t           largeLod,
 724                                      GrAspectRatio_t   aspectRatio,
 725                                      GrTextureFormat_t format,
 726                                      FxU32             evenOdd,
 727                                               void              *data );
 728
 729
 730 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 731 {
 732    printf("%s\n", __FUNCTION__);
 733    (*real_grDrawTriangle)(a, b, c);
 734 }
 735
 736 static void debug_grDrawPoint( const void *a )
 737 {
 738    const float *f = (const float *) a;
 739    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 740    (*real_grDrawPoint)(a);
 741 }
 742
 743 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 744 {
 745    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 746    (*real_grDrawVertexArray)(mode, Count, pointers);
 747 }
 748
 749 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 750                                        void *pointers, FxU32 stride)
 751 {
 752    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 753    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 754 }
 755
 756 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 757 {
 758    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 759           (int) minx, (int) miny, (int) maxx, (int) maxy);
 760    (*real_grClipWindow)(minx, miny, maxx, maxy);
 761 }
 762
 763 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 764 {
 765    (*real_grVertexLayout)(param, offset, mode);
 766 }
 767
 768 static void debug_grGlideGetVertexLayout( void *layout )
 769 {
 770    (*real_grGlideGetVertexLayout)(layout);
 771 }
 772
 773 static void debug_grGlideSetVertexLayout( const void *layout )
 774 {
 775    (*real_grGlideSetVertexLayout)(layout);
 776 }
 777
 778 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 779                                      FxU32             startAddress,
 780                                      GrLOD_t           thisLod,
 781                                      GrLOD_t           largeLod,
 782                                      GrAspectRatio_t   aspectRatio,
 783                                      GrTextureFormat_t format,
 784                                      FxU32             evenOdd,
 785                                      void              *data )
 786 {
 787    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 788                                     aspectRatio, format, evenOdd, data);
 789 }
 790
 791 #endif
 792
 793
 794 /*
 795  * Examine the context's deviceID to determine what kind of 3dfx hardware
 796  * is installed.  dlopen() the appropriate Glide library and initialize
 797  * this context's Glide function pointers.
 798  * Return:  true/false = success/failure
 799  */
 800 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 801 {
 802    static const char *defaultGlide = "libglide3.so";
 803    const char *libName;
 804    void *libHandle;
 805
 806    /*
 807     * XXX this code which selects a Glide library filename given the
 808     * deviceID may need to be cleaned up a bit.
 809     * Non-Linux systems may have different filenames, for example.
 810     */
 811    switch (tmesa->fxScreen->deviceID) {
 812    case PCI_CHIP_BANSHEE:
 813    case PCI_CHIP_VOODOO3:
 814       libName = "libglide3-v3.so";
 815       break;
 816    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 817       libName = "libglide3-v5.so";
 818       break;
 819    default:
 820       {
 821          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 822                  tmesa->fxScreen->deviceID);
 823       }
 824       return GL_FALSE;
 825    }
 826
 827    libHandle = dlopen(libName, RTLD_NOW);
 828    if (!libHandle) {
 829       /* The device-specific Glide library filename didn't work, try the
 830        * old, generic libglide3.so library.
 831        */
 832       libHandle = dlopen(defaultGlide, RTLD_NOW);
 833       if (!libHandle) {
 834          __driUtilMessage(
 835             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 836             libName, defaultGlide);
 837          __driUtilMessage("dlerror() message: %s", dlerror());
 838          return GL_FALSE;
 839       }
 840       libName = defaultGlide;
 841    }
 842
 843    {
 844       const char *env = getenv("LIBGL_DEBUG");
 845       if (env && strstr(env, "verbose")) {
 846          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 847       }
 848    }
 849
 850 #define GET_FUNCTION(PTR, NAME)                                         \
 851    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 852    if (!tmesa->Glide.PTR) {                                             \
 853       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 854               NAME, libName);                                           \
 855    }
 856
 857    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 858    GET_FUNCTION(grDrawLine, "grDrawLine");
 859    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 860    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 861    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 862    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 863    GET_FUNCTION(grBufferClear, "grBufferClear");
 864    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 865    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 866    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 867    GET_FUNCTION(grFinish, "grFinish");
 868    GET_FUNCTION(grFlush, "grFlush");
 869    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 870    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 871 #if 0
 872    /* Not in V3 lib, and not used anyway. */
 873    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 874 #endif
 875    GET_FUNCTION(grSelectContext, "grSelectContext");
 876    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 877    GET_FUNCTION(grSstSelect, "grSstSelect");
 878    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 879    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 880    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 881    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 882    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 883    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 884    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 885    GET_FUNCTION(grClipWindow, "grClipWindow");
 886    GET_FUNCTION(grColorCombine, "grColorCombine");
 887    GET_FUNCTION(grColorMask, "grColorMask");
 888    GET_FUNCTION(grCullMode, "grCullMode");
 889    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 890    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 891    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 892    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 893    GET_FUNCTION(grDepthMask, "grDepthMask");
 894    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 895    GET_FUNCTION(grDitherMode, "grDitherMode");
 896    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 897    GET_FUNCTION(grFogMode, "grFogMode");
 898    GET_FUNCTION(grFogTable, "grFogTable");
 899    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 900    GET_FUNCTION(grSplash, "grSplash");
 901    GET_FUNCTION(grGet, "grGet");
 902    GET_FUNCTION(grGetString, "grGetString");
 903    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 904    GET_FUNCTION(grReset, "grReset");
 905    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 906    GET_FUNCTION(grEnable, "grEnable");
 907    GET_FUNCTION(grDisable, "grDisable");
 908    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 909    GET_FUNCTION(grDepthRange, "grDepthRange");
 910    GET_FUNCTION(grStippleMode, "grStippleMode");
 911    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 912    GET_FUNCTION(grViewport, "grViewport");
 913    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 914    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 915    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 916    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 917    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 918    GET_FUNCTION(grTexSource, "grTexSource");
 919    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 920    GET_FUNCTION(grTexCombine, "grTexCombine");
 921    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 922    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 923    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 924    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 925    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 926    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 927    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 928    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 929    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 930    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 931    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 932    GET_FUNCTION(grLfbLock, "grLfbLock");
 933    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 934    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 935    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 936    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 937    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 938    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 939    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 940    GET_FUNCTION(grGlideInit, "grGlideInit");
 941    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 942    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 943    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 944    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 945    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 946
 947    /* Glide utility functions */
 948    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 949    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 950    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 951
 952    /* DRI functions */
 953    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 954    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 955    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 956    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 957    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 958    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 959    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 960
 961    /*
 962     * Extension functions:
 963     * Just use dlysm() because we want a NULL pointer if the function is
 964     * not found.
 965     */
 966    /* PIXEXT extension */
 967    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 968    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 969    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 970    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 971    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 972    /* COMBINE extension */
 973    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 974    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 975    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 976    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 977    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 978    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 979    /* Texus 2 */
 980    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 981    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 982    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 983
 984 #ifdef DEBUG_TRAP
 985    /* wrap the drawing functions so we can trap them */
 986    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 987    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 988
 989    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 990    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
 991
 992    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
 993    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
 994
 995    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
 996    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
 997
 998    real_grClipWindow = tmesa->Glide.grClipWindow;
 999    tmesa->Glide.grClipWindow = debug_grClipWindow;
1000
1001    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1002    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1003
1004    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1005    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1006
1007    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1008    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1009
1010    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1011    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1012
1013 #endif
1014    return GL_TRUE;
1015 }