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 #include "hash.h"
  53
  54 #include "swrast/swrast.h"
  55 #include "swrast_setup/swrast_setup.h"
  56 #include "array_cache/acache.h"
  57
  58 #include "tnl/tnl.h"
  59 #include "tnl/t_pipeline.h"
  60
  61 #include "drivers/common/driverfuncs.h"
  62
  63 #include "utils.h"
  64
  65 #define need_GL_ARB_multisample
  66 /* #define need_GL_ARB_point_parameters */
  67 #define need_GL_ARB_texture_compression
  68 #define need_GL_ARB_vertex_buffer_object
  69 /* #define need_GL_ARB_vertex_program */
  70 #define need_GL_EXT_blend_equation_separate
  71 #define need_GL_EXT_blend_func_separate
  72 #define need_GL_EXT_blend_minmax
  73 #define need_GL_EXT_fog_coord
  74 #define need_GL_EXT_multi_draw_arrays
  75 #define need_GL_EXT_paletted_texture
  76 /* #define need_GL_EXT_secondary_color */
  77 #define need_GL_IBM_multimode_draw_arrays
  78 /* #define need_GL_MESA_program_debug */
  79 /* #define need_GL_NV_vertex_program */
  80 #include "extension_helper.h"
  81
  82
  83 /**
  84  * Common extension strings exported by all cards
  85  */
  86 const struct dri_extension card_extensions[] =
  87 {
  88     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
  89     { "GL_ARB_texture_mirrored_repeat",    NULL },
  90     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
  91
  92     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  93     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  94     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
  95     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  96     { "GL_EXT_shared_texture_palette",     NULL },
  97     { "GL_EXT_stencil_wrap",               NULL },
  98     { "GL_EXT_texture_env_add",            NULL },
  99     { "GL_EXT_texture_lod_bias",           NULL },
 100     { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },
 101
 102 #ifdef need_GL_ARB_point_parameters
 103     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 104     { "GL_ARB_point_sprite",               NULL },
 105 #endif
 106 #ifdef need_GL_EXT_secondary_color
 107     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 108 #endif
 109 #ifdef need_GL_ARB_vertex_program
 110     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 111 #endif
 112 #ifdef need_GL_NV_vertex_program
 113     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 114     { "GL_NV_vertex_program1_1",           NULL },
 115 #endif
 116 #ifdef need_GL_MESA_program_debug
 117     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 118 #endif
 119     { NULL,                                NULL }
 120 };
 121
 122 /**
 123  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 124  */
 125 const struct dri_extension napalm_extensions[] =
 126 {
 127     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 128     { "GL_ARB_texture_env_combine",        NULL },
 129     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 130     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 131     { "GL_EXT_texture_compression_s3tc",   NULL },
 132     { "GL_EXT_texture_env_combine",        NULL },
 133
 134     { "GL_3DFX_texture_compression_FXT1",  NULL },
 135     { "GL_NV_blend_square",                NULL },
 136     { "GL_S3_s3tc",                        NULL },
 137     { NULL,                                NULL }
 138 };
 139
 140 /*
 141  * Enable/Disable the extensions for this context.
 142  */
 143 static void tdfxDDInitExtensions( GLcontext *ctx )
 144 {
 145    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 146
 147    driInitExtensions( ctx, card_extensions, GL_FALSE );
 148
 149    if ( fxMesa->haveTwoTMUs ) {
 150       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 151    }
 152
 153    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 154       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 155    } else {
 156       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 157    }
 158 }
 159
 160
 161
 162 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 163    &_tnl_vertex_transform_stage,
 164    &_tnl_normal_transform_stage,
 165    &_tnl_lighting_stage,
 166    &_tnl_fog_coordinate_stage,
 167    &_tnl_texgen_stage,
 168    &_tnl_texture_transform_stage,
 169    &_tnl_point_attenuation_stage,
 170 #if 0
 171 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program)
 172    &_tnl_arb_vertex_program_stage,
 173    &_tnl_vertex_program_stage,
 174 #endif
 175 #endif
 176    &_tnl_render_stage,
 177    0,
 178 };
 179
 180 static const struct dri_debug_control debug_control[] =
 181 {
 182     { "dri",   DEBUG_VERBOSE_DRI },
 183     { "sync",  DEBUG_ALWAYS_SYNC },
 184     { "api",   DEBUG_VERBOSE_API },
 185     { "fall",  DEBUG_VERBOSE_FALL },
 186     { NULL,    0 }
 187 };
 188
 189 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 190                              __DRIcontextPrivate *driContextPriv,
 191                              void *sharedContextPrivate )
 192 {
 193    tdfxContextPtr fxMesa;
 194    GLcontext *ctx, *shareCtx;
 195    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 196    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 197    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 198                                               sizeof(drm_sarea_t));
 199    struct dd_function_table functions;
 200
 201    /* Allocate tdfx context */
 202    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 203    if (!fxMesa)
 204       return GL_FALSE;
 205
 206    /* Init default driver functions then plug in our tdfx-specific functions
 207     * (the texture functions are especially important)
 208     */
 209    _mesa_init_driver_functions(&functions);
 210    tdfxDDInitDriverFuncs(mesaVis, &functions);
 211    tdfxInitTextureFuncs(&functions);
 212    tdfxInitRenderFuncs(&functions);
 213
 214    /* Allocate the Mesa context */
 215    if (sharedContextPrivate)
 216       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 217    else
 218       shareCtx = NULL;
 219
 220    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 221                                         &functions, (void *) fxMesa);
 222    if (!fxMesa->glCtx) {
 223       FREE(fxMesa);
 224       return GL_FALSE;
 225    }
 226    driContextPriv->driverPrivate = fxMesa;
 227
 228    /* Mirror some important DRI state
 229     */
 230    fxMesa->hHWContext = driContextPriv->hHWContext;
 231    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 232    fxMesa->driFd = sPriv->fd;
 233
 234    fxMesa->driScreen = sPriv;
 235    fxMesa->driContext = driContextPriv;
 236    fxMesa->fxScreen = fxScreen;
 237    fxMesa->sarea = saPriv;
 238
 239    /*JJJ - really?*/
 240    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 241                            ((mesaVis->greenBits == 8) ||
 242                             (mesaVis->depthBits == 0)) );
 243    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 244                              mesaVis->stencilBits &&
 245                              mesaVis->depthBits == 24 );
 246
 247    fxMesa->screen_width = fxScreen->width;
 248    fxMesa->screen_height = fxScreen->height;
 249
 250    fxMesa->new_gl_state = ~0;
 251    fxMesa->new_state = ~0;
 252    fxMesa->dirty = ~0;
 253
 254    /* Parse configuration files */
 255    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 256                         fxMesa->driScreen->myNum, "tdfx");
 257
 258    /* NOTE: This must be here before any Glide calls! */
 259    if (!tdfxInitGlide( fxMesa )) {
 260       FREE(fxMesa);
 261       return GL_FALSE;
 262    }
 263
 264    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 265               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 266               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 267               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 268               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 269               &saPriv->fifoRead );
 270
 271    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 272       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 273    } else {
 274       fxMesa->Glide.SwapInterval = 0;
 275    }
 276    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 277       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 278    } else {
 279       fxMesa->Glide.MaxPendingSwaps = 2;
 280    }
 281
 282    fxMesa->Glide.Initialized = GL_FALSE;
 283    fxMesa->Glide.Board = 0;
 284
 285
 286    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 287       fxMesa->haveTwoTMUs = GL_FALSE;
 288    }
 289    else {
 290       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 291          fxMesa->haveTwoTMUs = GL_FALSE;
 292       } else {
 293          fxMesa->haveTwoTMUs = GL_TRUE;
 294       }
 295    }
 296
 297    fxMesa->stats.swapBuffer = 0;
 298    fxMesa->stats.reqTexUpload = 0;
 299    fxMesa->stats.texUpload = 0;
 300    fxMesa->stats.memTexUpload = 0;
 301
 302    fxMesa->tmuSrc = TDFX_TMU_NONE;
 303
 304    ctx = fxMesa->glCtx;
 305    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 306       ctx->Const.MaxTextureLevels = 12;
 307    } else {
 308       ctx->Const.MaxTextureLevels = 9;
 309    }
 310    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 311    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 312    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 313
 314    /* No wide points.
 315     */
 316    ctx->Const.MinPointSize = 1.0;
 317    ctx->Const.MinPointSizeAA = 1.0;
 318    ctx->Const.MaxPointSize = 1.0;
 319    ctx->Const.MaxPointSizeAA = 1.0;
 320
 321    /* Disable wide lines as we can't antialias them correctly in
 322     * hardware.
 323     */
 324    ctx->Const.MinLineWidth = 1.0;
 325    ctx->Const.MinLineWidthAA = 1.0;
 326    ctx->Const.MaxLineWidth = 1.0;
 327    ctx->Const.MaxLineWidthAA = 1.0;
 328    ctx->Const.LineWidthGranularity = 1.0;
 329
 330    /* Initialize the software rasterizer and helper modules.
 331     */
 332    _swrast_CreateContext( ctx );
 333    _ac_CreateContext( ctx );
 334    _tnl_CreateContext( ctx );
 335    _swsetup_CreateContext( ctx );
 336
 337    /* Install the customized pipeline:
 338     */
 339    _tnl_destroy_pipeline( ctx );
 340    _tnl_install_pipeline( ctx, tdfx_pipeline );
 341
 342    /* Configure swrast and T&L to match hardware characteristics:
 343     */
 344    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 345    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 346    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 347    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 348
 349    tdfxDDInitExtensions( ctx );
 350    /* XXX these should really go right after _mesa_init_driver_functions() */
 351    tdfxDDInitSpanFuncs( ctx );
 352    tdfxDDInitStateFuncs( ctx );
 353    tdfxDDInitTriFuncs( ctx );
 354    tdfxInitVB( ctx );
 355    tdfxInitState( fxMesa );
 356
 357 #if DO_DEBUG
 358    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 359 #endif
 360
 361    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 362       fprintf(stderr, "disabling 3D acceleration\n");
 363       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 364    }
 365
 366    return GL_TRUE;
 367 }
 368
 369
 370 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 371 {
 372    FxI32 result;
 373    int i;
 374
 375    LOCK_HARDWARE( fxMesa );
 376
 377    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 378    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 379       fxMesa->layout[i] = MALLOC( result );
 380       if ( !fxMesa->layout[i] ) {
 381          UNLOCK_HARDWARE( fxMesa );
 382          return GL_FALSE;
 383       }
 384    }
 385
 386    /* Tiny vertex format - 16 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_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 393    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 394
 395    /* Non textured vertex format - 24 bytes (Need w for table fog)
 396     */
 397    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 398    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 399    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 403    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 404
 405    /* Single textured vertex format - 32 bytes.
 406     */
 407    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 408    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 409    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 410    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 411    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 412    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 413    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 414    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 415
 416    /* Multitextured vertex format - 40 bytes.
 417     */
 418    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 419    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 420    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 421    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 422    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 423    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 424    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 425    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 426    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 427
 428    /* Projected texture vertex format - 36 bytes.
 429     */
 430    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 431    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 432    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 433    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 434    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 435    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 436    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 437    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 438    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 439
 440    /* Projected multitexture vertex format - 48 bytes.
 441     */
 442    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 443    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 444    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 445    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 446    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 447    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 448    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 449    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 450    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 451    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 452    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 453
 454    UNLOCK_HARDWARE( fxMesa );
 455
 456    return GL_TRUE;
 457 }
 458
 459
 460 /*
 461  * Initialize the state in an tdfxContextPtr struct.
 462  */
 463 static GLboolean
 464 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 465 {
 466    /* KW: Would be nice to make one of these a member of the other.
 467     */
 468    FxI32 result[2];
 469    const char *gext;
 470
 471    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 472       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 473    }
 474
 475 #if DEBUG_LOCKING
 476    fprintf(stderr, "Debug locking enabled\n");
 477 #endif
 478
 479    if ( fxMesa->Glide.Initialized )
 480       return GL_TRUE;
 481
 482    fxMesa->width = driDrawPriv->w;
 483    fxMesa->height = driDrawPriv->h;
 484
 485    /* We have to use a light lock here, because we can't do any glide
 486     * operations yet. No use of FX_* functions in this function.
 487     */
 488    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 489
 490    fxMesa->Glide.grGlideInit();
 491    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 492
 493    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 494                                          GR_RESOLUTION_NONE,
 495                                          GR_REFRESH_NONE,
 496                                          fxMesa->Glide.ColorFormat,
 497                                          fxMesa->Glide.Origin,
 498                                          2, 1 );
 499
 500    fxMesa->Glide.grDRIResetSAREA();
 501
 502    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 503
 504    if ( !fxMesa->Glide.Context )
 505       return GL_FALSE;
 506
 507
 508    /* Perform the Glide-dependant part of the context initialization.
 509     */
 510    FX_grColorMaskv( fxMesa->glCtx, true4 );
 511
 512    tdfxTMInit( fxMesa );
 513
 514    LOCK_HARDWARE( fxMesa );
 515
 516    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 517    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 518    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 519    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 520    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 521    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 522    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 523    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 524    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 525    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 526    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 527
 528    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 529       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 530    } else {
 531       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 532    }
 533
 534    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 535
 536    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 537    fxMesa->Glide.TextureAlign = result[0];
 538
 539    fxMesa->Glide.State = NULL;
 540    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 541    fxMesa->Glide.State = MALLOC( result[0] );
 542
 543    fxMesa->Fog.Table = NULL;
 544    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 545    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 546
 547    UNLOCK_HARDWARE( fxMesa );
 548
 549    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 550       if ( fxMesa->Glide.State )
 551          FREE( fxMesa->Glide.State );
 552       if ( fxMesa->Fog.Table )
 553          FREE( fxMesa->Fog.Table );
 554       return GL_FALSE;
 555    }
 556
 557    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 558       return GL_FALSE;
 559    }
 560
 561    LOCK_HARDWARE( fxMesa );
 562
 563    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 564
 565    if ( getenv( "FX_GLIDE_INFO" ) ) {
 566       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 567       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 568       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 569       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 570       printf( "GR_EXTENSION = %s\n", (char *) gext );
 571    }
 572
 573    UNLOCK_HARDWARE( fxMesa );
 574
 575    fxMesa->numClipRects = 0;
 576    fxMesa->pClipRects = NULL;
 577    fxMesa->scissoredClipRects = GL_FALSE;
 578
 579    fxMesa->Glide.Initialized = GL_TRUE;
 580
 581    return GL_TRUE;
 582 }
 583
 584
 585 void
 586 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 587 {
 588    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 589
 590    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 591       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 592    }
 593
 594    if ( fxMesa ) {
 595       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 596          /* This share group is about to go away, free our private
 597           * texture object data.
 598           */
 599          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 600          GLuint id;
 601          for (id = _mesa_HashFirstEntry(textures);
 602               id;
 603               id = _mesa_HashNextEntry(textures, id)) {
 604             struct gl_texture_object *tObj
 605                = (struct gl_texture_object *) _mesa_HashLookup(textures, id);
 606             tdfxTMFreeTexture(fxMesa, tObj);
 607          }
 608       }
 609
 610       tdfxTMClose(fxMesa);  /* free texture memory */
 611
 612       _swsetup_DestroyContext( fxMesa->glCtx );
 613       _tnl_DestroyContext( fxMesa->glCtx );
 614       _ac_DestroyContext( fxMesa->glCtx );
 615       _swrast_DestroyContext( fxMesa->glCtx );
 616
 617       tdfxFreeVB( fxMesa->glCtx );
 618
 619       /* Free Mesa context */
 620       fxMesa->glCtx->DriverCtx = NULL;
 621       _mesa_destroy_context(fxMesa->glCtx);
 622
 623       /* free the tdfx context */
 624       FREE( fxMesa );
 625    }
 626 }
 627
 628
 629 GLboolean
 630 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 631 {
 632    GET_CURRENT_CONTEXT(ctx);
 633    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 634
 635    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 636       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 637    }
 638
 639    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 640       LOCK_HARDWARE(fxMesa);
 641       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 642       UNLOCK_HARDWARE(fxMesa);
 643    }
 644    return GL_TRUE;
 645 }
 646
 647
 648 GLboolean
 649 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 650                  __DRIdrawablePrivate *driDrawPriv,
 651                  __DRIdrawablePrivate *driReadPriv )
 652 {
 653    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 654       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 655    }
 656
 657    if ( driContextPriv ) {
 658       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 659       GLcontext *newCtx = newFx->glCtx;
 660       GET_CURRENT_CONTEXT(curCtx);
 661
 662       if ( newFx->driDrawable != driDrawPriv ) {
 663          newFx->driDrawable = driDrawPriv;
 664          newFx->dirty = ~0;
 665       }
 666       else {
 667          if (curCtx == newCtx) {
 668             /* same drawable, same context -> no-op */
 669             /* Need to call _mesa_make_current2() in order to make sure API
 670              * dispatch is set correctly.
 671              */
 672             _mesa_make_current( newCtx,
 673                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 674                                 (GLframebuffer *) driReadPriv->driverPrivate );
 675             return GL_TRUE;
 676          }
 677          /* [dBorca] tunnel2 requires this */
 678          newFx->dirty = ~0;
 679       }
 680
 681       if ( !newFx->Glide.Initialized ) {
 682          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 683             return GL_FALSE;
 684
 685          LOCK_HARDWARE( newFx );
 686
 687          /* FIXME: Force loading of window information */
 688          newFx->width = 0;
 689          tdfxUpdateClipping(newCtx);
 690          tdfxUploadClipping(newFx);
 691
 692          UNLOCK_HARDWARE( newFx );
 693       } else {
 694          LOCK_HARDWARE( newFx );
 695
 696          newFx->Glide.grSstSelect( newFx->Glide.Board );
 697          newFx->Glide.grGlideSetState( newFx->Glide.State );
 698
 699          tdfxUpdateClipping(newCtx);
 700          tdfxUploadClipping(newFx);
 701
 702          UNLOCK_HARDWARE( newFx );
 703       }
 704
 705       _mesa_make_current( newCtx,
 706                           (GLframebuffer *) driDrawPriv->driverPrivate,
 707                           (GLframebuffer *) driReadPriv->driverPrivate );
 708    } else {
 709       _mesa_make_current( NULL, NULL, NULL );
 710    }
 711
 712    return GL_TRUE;
 713 }
 714
 715
 716 /*
 717  * Enable this to trace calls to various Glide functions.
 718  */
 719 /*#define DEBUG_TRAP*/
 720 #ifdef DEBUG_TRAP
 721 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 722 static void (*real_grDrawPoint)( const void *a );
 723 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 724 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 725                                        void *pointers, FxU32 stride);
 726 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 727
 728 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 729 static void (*real_grGlideGetVertexLayout)( void *layout );
 730 static void (*real_grGlideSetVertexLayout)( const void *layout );
 731
 732 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 733                                      FxU32             startAddress,
 734                                      GrLOD_t           thisLod,
 735                                      GrLOD_t           largeLod,
 736                                      GrAspectRatio_t   aspectRatio,
 737                                      GrTextureFormat_t format,
 738                                      FxU32             evenOdd,
 739                                               void              *data );
 740
 741
 742 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 743 {
 744    printf("%s\n", __FUNCTION__);
 745    (*real_grDrawTriangle)(a, b, c);
 746 }
 747
 748 static void debug_grDrawPoint( const void *a )
 749 {
 750    const float *f = (const float *) a;
 751    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 752    (*real_grDrawPoint)(a);
 753 }
 754
 755 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 756 {
 757    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 758    (*real_grDrawVertexArray)(mode, Count, pointers);
 759 }
 760
 761 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 762                                        void *pointers, FxU32 stride)
 763 {
 764    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 765    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 766 }
 767
 768 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 769 {
 770    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 771           (int) minx, (int) miny, (int) maxx, (int) maxy);
 772    (*real_grClipWindow)(minx, miny, maxx, maxy);
 773 }
 774
 775 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 776 {
 777    (*real_grVertexLayout)(param, offset, mode);
 778 }
 779
 780 static void debug_grGlideGetVertexLayout( void *layout )
 781 {
 782    (*real_grGlideGetVertexLayout)(layout);
 783 }
 784
 785 static void debug_grGlideSetVertexLayout( const void *layout )
 786 {
 787    (*real_grGlideSetVertexLayout)(layout);
 788 }
 789
 790 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 791                                      FxU32             startAddress,
 792                                      GrLOD_t           thisLod,
 793                                      GrLOD_t           largeLod,
 794                                      GrAspectRatio_t   aspectRatio,
 795                                      GrTextureFormat_t format,
 796                                      FxU32             evenOdd,
 797                                      void              *data )
 798 {
 799    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 800                                     aspectRatio, format, evenOdd, data);
 801 }
 802
 803 #endif
 804
 805
 806 /*
 807  * Examine the context's deviceID to determine what kind of 3dfx hardware
 808  * is installed.  dlopen() the appropriate Glide library and initialize
 809  * this context's Glide function pointers.
 810  * Return:  true/false = success/failure
 811  */
 812 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 813 {
 814    static const char *defaultGlide = "libglide3.so";
 815    const char *libName;
 816    void *libHandle;
 817
 818    /*
 819     * XXX this code which selects a Glide library filename given the
 820     * deviceID may need to be cleaned up a bit.
 821     * Non-Linux systems may have different filenames, for example.
 822     */
 823    switch (tmesa->fxScreen->deviceID) {
 824    case PCI_CHIP_BANSHEE:
 825    case PCI_CHIP_VOODOO3:
 826       libName = "libglide3-v3.so";
 827       break;
 828    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 829       libName = "libglide3-v5.so";
 830       break;
 831    default:
 832       {
 833          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 834                  tmesa->fxScreen->deviceID);
 835       }
 836       return GL_FALSE;
 837    }
 838
 839    libHandle = dlopen(libName, RTLD_NOW);
 840    if (!libHandle) {
 841       /* The device-specific Glide library filename didn't work, try the
 842        * old, generic libglide3.so library.
 843        */
 844       libHandle = dlopen(defaultGlide, RTLD_NOW);
 845       if (!libHandle) {
 846          __driUtilMessage(
 847             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 848             libName, defaultGlide);
 849          __driUtilMessage("dlerror() message: %s", dlerror());
 850          return GL_FALSE;
 851       }
 852       libName = defaultGlide;
 853    }
 854
 855    {
 856       const char *env = getenv("LIBGL_DEBUG");
 857       if (env && strstr(env, "verbose")) {
 858          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 859       }
 860    }
 861
 862 #define GET_FUNCTION(PTR, NAME)                                         \
 863    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 864    if (!tmesa->Glide.PTR) {                                             \
 865       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 866               NAME, libName);                                           \
 867    }
 868
 869    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 870    GET_FUNCTION(grDrawLine, "grDrawLine");
 871    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 872    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 873    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 874    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 875    GET_FUNCTION(grBufferClear, "grBufferClear");
 876    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 877    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 878    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 879    GET_FUNCTION(grFinish, "grFinish");
 880    GET_FUNCTION(grFlush, "grFlush");
 881    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 882    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 883 #if 0
 884    /* Not in V3 lib, and not used anyway. */
 885    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 886 #endif
 887    GET_FUNCTION(grSelectContext, "grSelectContext");
 888    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 889    GET_FUNCTION(grSstSelect, "grSstSelect");
 890    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 891    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 892    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 893    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 894    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 895    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 896    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 897    GET_FUNCTION(grClipWindow, "grClipWindow");
 898    GET_FUNCTION(grColorCombine, "grColorCombine");
 899    GET_FUNCTION(grColorMask, "grColorMask");
 900    GET_FUNCTION(grCullMode, "grCullMode");
 901    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 902    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 903    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 904    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 905    GET_FUNCTION(grDepthMask, "grDepthMask");
 906    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 907    GET_FUNCTION(grDitherMode, "grDitherMode");
 908    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 909    GET_FUNCTION(grFogMode, "grFogMode");
 910    GET_FUNCTION(grFogTable, "grFogTable");
 911    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 912    GET_FUNCTION(grSplash, "grSplash");
 913    GET_FUNCTION(grGet, "grGet");
 914    GET_FUNCTION(grGetString, "grGetString");
 915    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 916    GET_FUNCTION(grReset, "grReset");
 917    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 918    GET_FUNCTION(grEnable, "grEnable");
 919    GET_FUNCTION(grDisable, "grDisable");
 920    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 921    GET_FUNCTION(grDepthRange, "grDepthRange");
 922    GET_FUNCTION(grStippleMode, "grStippleMode");
 923    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 924    GET_FUNCTION(grViewport, "grViewport");
 925    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 926    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 927    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 928    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 929    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 930    GET_FUNCTION(grTexSource, "grTexSource");
 931    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 932    GET_FUNCTION(grTexCombine, "grTexCombine");
 933    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 934    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 935    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 936    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 937    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 938    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 939    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 940    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 941    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 942    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 943    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 944    GET_FUNCTION(grLfbLock, "grLfbLock");
 945    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 946    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 947    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 948    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 949    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 950    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 951    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 952    GET_FUNCTION(grGlideInit, "grGlideInit");
 953    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 954    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 955    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 956    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 957    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 958
 959    /* Glide utility functions */
 960    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 961    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 962    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 963
 964    /* DRI functions */
 965    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 966    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 967    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 968    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 969    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 970    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 971    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 972
 973    /*
 974     * Extension functions:
 975     * Just use dlysm() because we want a NULL pointer if the function is
 976     * not found.
 977     */
 978    /* PIXEXT extension */
 979    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 980    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 981    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 982    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 983    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 984    /* COMBINE extension */
 985    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 986    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 987    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 988    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 989    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 990    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 991    /* Texus 2 */
 992    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 993    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 994    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 995
 996 #ifdef DEBUG_TRAP
 997    /* wrap the drawing functions so we can trap them */
 998    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 999    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
1000
1001    real_grDrawPoint = tmesa->Glide.grDrawPoint;
1002    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
1003
1004    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
1005    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
1006
1007    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
1008    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
1009
1010    real_grClipWindow = tmesa->Glide.grClipWindow;
1011    tmesa->Glide.grClipWindow = debug_grClipWindow;
1012
1013    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1014    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1015
1016    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1017    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1018
1019    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1020    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1021
1022    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1023    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1024
1025 #endif
1026    return GL_TRUE;
1027 }