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 "extensions.h"
  47 #include "hash.h"
  48 #include "texobj.h"
  49
  50 #include "swrast/swrast.h"
  51 #include "swrast_setup/swrast_setup.h"
  52 #include "array_cache/acache.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_multisample
  62 /* #define need_GL_ARB_point_parameters */
  63 #define need_GL_ARB_occlusion_query
  64 #define need_GL_ARB_texture_compression
  65 #define need_GL_ARB_vertex_buffer_object
  66 /* #define need_GL_ARB_vertex_program */
  67 #define need_GL_EXT_blend_equation_separate
  68 #define need_GL_EXT_blend_func_separate
  69 #define need_GL_EXT_blend_minmax
  70 #define need_GL_EXT_fog_coord
  71 #define need_GL_EXT_multi_draw_arrays
  72 #define need_GL_EXT_paletted_texture
  73 /* #define need_GL_EXT_secondary_color */
  74 #define need_GL_IBM_multimode_draw_arrays
  75 /* #define need_GL_MESA_program_debug */
  76 /* #define need_GL_NV_vertex_program */
  77 #include "extension_helper.h"
  78
  79
  80 /**
  81  * Common extension strings exported by all cards
  82  */
  83 const struct dri_extension card_extensions[] =
  84 {
  85     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
  86     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
  87     { "GL_ARB_texture_mirrored_repeat",    NULL },
  88     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
  89
  90     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  91     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  92     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
  93     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  94     { "GL_EXT_shared_texture_palette",     NULL },
  95     { "GL_EXT_stencil_wrap",               NULL },
  96     { "GL_EXT_texture_env_add",            NULL },
  97     { "GL_EXT_texture_lod_bias",           NULL },
  98     { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },
  99
 100 #ifdef need_GL_ARB_point_parameters
 101     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 102     { "GL_ARB_point_sprite",               NULL },
 103 #endif
 104 #ifdef need_GL_EXT_secondary_color
 105     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 106 #endif
 107 #ifdef need_GL_ARB_vertex_program
 108     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 109 #endif
 110 #ifdef need_GL_NV_vertex_program
 111     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 112     { "GL_NV_vertex_program1_1",           NULL },
 113 #endif
 114 #ifdef need_GL_MESA_program_debug
 115     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 116 #endif
 117     { NULL,                                NULL }
 118 };
 119
 120 /**
 121  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 122  */
 123 const struct dri_extension napalm_extensions[] =
 124 {
 125     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 126     { "GL_ARB_texture_env_combine",        NULL },
 127     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 128     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 129     { "GL_EXT_texture_compression_s3tc",   NULL },
 130     { "GL_EXT_texture_env_combine",        NULL },
 131
 132     { "GL_3DFX_texture_compression_FXT1",  NULL },
 133     { "GL_NV_blend_square",                NULL },
 134     { "GL_S3_s3tc",                        NULL },
 135     { NULL,                                NULL }
 136 };
 137
 138 /*
 139  * Enable/Disable the extensions for this context.
 140  */
 141 static void tdfxDDInitExtensions( GLcontext *ctx )
 142 {
 143    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 144
 145    driInitExtensions( ctx, card_extensions, GL_FALSE );
 146
 147    if ( fxMesa->haveTwoTMUs ) {
 148       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 149    }
 150
 151    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 152       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 153    } else {
 154       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 155    }
 156 }
 157
 158
 159
 160 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 161    &_tnl_vertex_transform_stage,
 162    &_tnl_normal_transform_stage,
 163    &_tnl_lighting_stage,
 164    &_tnl_fog_coordinate_stage,
 165    &_tnl_texgen_stage,
 166    &_tnl_texture_transform_stage,
 167    &_tnl_point_attenuation_stage,
 168 #if 0
 169 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program)
 170    &_tnl_arb_vertex_program_stage,
 171    &_tnl_vertex_program_stage,
 172 #endif
 173 #endif
 174    &_tnl_render_stage,
 175    0,
 176 };
 177
 178 static const struct dri_debug_control debug_control[] =
 179 {
 180     { "dri",   DEBUG_VERBOSE_DRI },
 181     { "sync",  DEBUG_ALWAYS_SYNC },
 182     { "api",   DEBUG_VERBOSE_API },
 183     { "fall",  DEBUG_VERBOSE_FALL },
 184     { NULL,    0 }
 185 };
 186
 187 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 188                              __DRIcontextPrivate *driContextPriv,
 189                              void *sharedContextPrivate )
 190 {
 191    tdfxContextPtr fxMesa;
 192    GLcontext *ctx, *shareCtx;
 193    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 194    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 195    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 196                                               sizeof(drm_sarea_t));
 197    struct dd_function_table functions;
 198
 199    /* Allocate tdfx context */
 200    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 201    if (!fxMesa)
 202       return GL_FALSE;
 203
 204    /* Init default driver functions then plug in our tdfx-specific functions
 205     * (the texture functions are especially important)
 206     */
 207    _mesa_init_driver_functions(&functions);
 208    tdfxDDInitDriverFuncs(mesaVis, &functions);
 209    tdfxInitTextureFuncs(&functions);
 210    tdfxInitRenderFuncs(&functions);
 211
 212    /* Allocate the Mesa context */
 213    if (sharedContextPrivate)
 214       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 215    else
 216       shareCtx = NULL;
 217
 218    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 219                                         &functions, (void *) fxMesa);
 220    if (!fxMesa->glCtx) {
 221       FREE(fxMesa);
 222       return GL_FALSE;
 223    }
 224    driContextPriv->driverPrivate = fxMesa;
 225
 226    /* Mirror some important DRI state
 227     */
 228    fxMesa->hHWContext = driContextPriv->hHWContext;
 229    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 230    fxMesa->driFd = sPriv->fd;
 231
 232    fxMesa->driScreen = sPriv;
 233    fxMesa->driContext = driContextPriv;
 234    fxMesa->fxScreen = fxScreen;
 235    fxMesa->sarea = saPriv;
 236
 237    /*JJJ - really?*/
 238    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 239                            ((mesaVis->greenBits == 8) ||
 240                             (mesaVis->depthBits == 0)) );
 241    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 242                              mesaVis->stencilBits &&
 243                              mesaVis->depthBits == 24 );
 244
 245    fxMesa->screen_width = fxScreen->width;
 246    fxMesa->screen_height = fxScreen->height;
 247
 248    fxMesa->new_gl_state = ~0;
 249    fxMesa->new_state = ~0;
 250    fxMesa->dirty = ~0;
 251
 252    /* Parse configuration files */
 253    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 254                         fxMesa->driScreen->myNum, "tdfx");
 255
 256    /* NOTE: This must be here before any Glide calls! */
 257    if (!tdfxInitGlide( fxMesa )) {
 258       FREE(fxMesa);
 259       return GL_FALSE;
 260    }
 261
 262    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 263               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 264               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 265               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 266               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 267               &saPriv->fifoRead );
 268
 269    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 270       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 271    } else {
 272       fxMesa->Glide.SwapInterval = 0;
 273    }
 274    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 275       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 276    } else {
 277       fxMesa->Glide.MaxPendingSwaps = 2;
 278    }
 279
 280    fxMesa->Glide.Initialized = GL_FALSE;
 281    fxMesa->Glide.Board = 0;
 282
 283
 284    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 285       fxMesa->haveTwoTMUs = GL_FALSE;
 286    }
 287    else {
 288       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 289          fxMesa->haveTwoTMUs = GL_FALSE;
 290       } else {
 291          fxMesa->haveTwoTMUs = GL_TRUE;
 292       }
 293    }
 294
 295    fxMesa->stats.swapBuffer = 0;
 296    fxMesa->stats.reqTexUpload = 0;
 297    fxMesa->stats.texUpload = 0;
 298    fxMesa->stats.memTexUpload = 0;
 299
 300    fxMesa->tmuSrc = TDFX_TMU_NONE;
 301
 302    ctx = fxMesa->glCtx;
 303    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 304       ctx->Const.MaxTextureLevels = 12;
 305    } else {
 306       ctx->Const.MaxTextureLevels = 9;
 307    }
 308    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 309    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 310    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 311
 312    /* No wide points.
 313     */
 314    ctx->Const.MinPointSize = 1.0;
 315    ctx->Const.MinPointSizeAA = 1.0;
 316    ctx->Const.MaxPointSize = 1.0;
 317    ctx->Const.MaxPointSizeAA = 1.0;
 318
 319    /* Disable wide lines as we can't antialias them correctly in
 320     * hardware.
 321     */
 322    ctx->Const.MinLineWidth = 1.0;
 323    ctx->Const.MinLineWidthAA = 1.0;
 324    ctx->Const.MaxLineWidth = 1.0;
 325    ctx->Const.MaxLineWidthAA = 1.0;
 326    ctx->Const.LineWidthGranularity = 1.0;
 327
 328    /* Initialize the software rasterizer and helper modules.
 329     */
 330    _swrast_CreateContext( ctx );
 331    _ac_CreateContext( ctx );
 332    _tnl_CreateContext( ctx );
 333    _swsetup_CreateContext( ctx );
 334
 335    /* Install the customized pipeline:
 336     */
 337    _tnl_destroy_pipeline( ctx );
 338    _tnl_install_pipeline( ctx, tdfx_pipeline );
 339
 340    /* Configure swrast and T&L to match hardware characteristics:
 341     */
 342    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 343    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 344    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 345    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 346
 347    tdfxDDInitExtensions( ctx );
 348    /* XXX these should really go right after _mesa_init_driver_functions() */
 349    tdfxDDInitSpanFuncs( ctx );
 350    tdfxDDInitStateFuncs( ctx );
 351    tdfxDDInitTriFuncs( ctx );
 352    tdfxInitVB( ctx );
 353    tdfxInitState( fxMesa );
 354
 355 #if DO_DEBUG
 356    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 357 #endif
 358
 359    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 360       fprintf(stderr, "disabling 3D acceleration\n");
 361       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 362    }
 363
 364    return GL_TRUE;
 365 }
 366
 367
 368 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 369 {
 370    FxI32 result;
 371    int i;
 372
 373    LOCK_HARDWARE( fxMesa );
 374
 375    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 376    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 377       fxMesa->layout[i] = MALLOC( result );
 378       if ( !fxMesa->layout[i] ) {
 379          UNLOCK_HARDWARE( fxMesa );
 380          return GL_FALSE;
 381       }
 382    }
 383
 384    /* Tiny vertex format - 16 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_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 391    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 392
 393    /* Non textured vertex format - 24 bytes (Need w for table fog)
 394     */
 395    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 396    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 397    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 398    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 399    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 402
 403    /* Single textured vertex format - 32 bytes.
 404     */
 405    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 406    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 407    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 408    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 409    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 410    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 411    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 412    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 413
 414    /* Multitextured vertex format - 40 bytes.
 415     */
 416    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 417    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 418    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 419    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 420    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 421    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 422    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 423    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 424    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 425
 426    /* Projected texture vertex format - 36 bytes.
 427     */
 428    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 429    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 430    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 431    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 432    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 433    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 434    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 435    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 436    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 437
 438    /* Projected multitexture vertex format - 48 bytes.
 439     */
 440    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 441    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 442    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 443    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 444    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 445    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 446    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 447    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 448    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 449    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 450    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 451
 452    UNLOCK_HARDWARE( fxMesa );
 453
 454    return GL_TRUE;
 455 }
 456
 457
 458 /*
 459  * Initialize the state in an tdfxContextPtr struct.
 460  */
 461 static GLboolean
 462 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 463 {
 464    /* KW: Would be nice to make one of these a member of the other.
 465     */
 466    FxI32 result[2];
 467    const char *gext;
 468
 469    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 470       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 471    }
 472
 473 #if DEBUG_LOCKING
 474    fprintf(stderr, "Debug locking enabled\n");
 475 #endif
 476
 477    if ( fxMesa->Glide.Initialized )
 478       return GL_TRUE;
 479
 480    fxMesa->width = driDrawPriv->w;
 481    fxMesa->height = driDrawPriv->h;
 482
 483    /* We have to use a light lock here, because we can't do any glide
 484     * operations yet. No use of FX_* functions in this function.
 485     */
 486    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 487
 488    fxMesa->Glide.grGlideInit();
 489    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 490
 491    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 492                                          GR_RESOLUTION_NONE,
 493                                          GR_REFRESH_NONE,
 494                                          fxMesa->Glide.ColorFormat,
 495                                          fxMesa->Glide.Origin,
 496                                          2, 1 );
 497
 498    fxMesa->Glide.grDRIResetSAREA();
 499
 500    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 501
 502    if ( !fxMesa->Glide.Context )
 503       return GL_FALSE;
 504
 505
 506    /* Perform the Glide-dependant part of the context initialization.
 507     */
 508    FX_grColorMaskv( fxMesa->glCtx, true4 );
 509
 510    tdfxTMInit( fxMesa );
 511
 512    LOCK_HARDWARE( fxMesa );
 513
 514    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 515    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 516    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 517    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 518    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 519    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 520    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 521    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 522    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 523    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 524    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 525
 526    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 527       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 528    } else {
 529       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 530    }
 531
 532    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 533
 534    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 535    fxMesa->Glide.TextureAlign = result[0];
 536
 537    fxMesa->Glide.State = NULL;
 538    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 539    fxMesa->Glide.State = MALLOC( result[0] );
 540
 541    fxMesa->Fog.Table = NULL;
 542    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 543    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 544
 545    UNLOCK_HARDWARE( fxMesa );
 546
 547    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 548       if ( fxMesa->Glide.State )
 549          FREE( fxMesa->Glide.State );
 550       if ( fxMesa->Fog.Table )
 551          FREE( fxMesa->Fog.Table );
 552       return GL_FALSE;
 553    }
 554
 555    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 556       return GL_FALSE;
 557    }
 558
 559    LOCK_HARDWARE( fxMesa );
 560
 561    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 562
 563    if ( getenv( "FX_GLIDE_INFO" ) ) {
 564       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 565       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 566       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 567       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 568       printf( "GR_EXTENSION = %s\n", (char *) gext );
 569    }
 570
 571    UNLOCK_HARDWARE( fxMesa );
 572
 573    fxMesa->numClipRects = 0;
 574    fxMesa->pClipRects = NULL;
 575    fxMesa->scissoredClipRects = GL_FALSE;
 576
 577    fxMesa->Glide.Initialized = GL_TRUE;
 578
 579    return GL_TRUE;
 580 }
 581
 582
 583 void
 584 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 585 {
 586    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 587
 588    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 589       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 590    }
 591
 592    if ( fxMesa ) {
 593       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 594          /* This share group is about to go away, free our private
 595           * texture object data.
 596           */
 597          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 598          GLuint id;
 599          for (id = _mesa_HashFirstEntry(textures);
 600               id;
 601               id = _mesa_HashNextEntry(textures, id)) {
 602             struct gl_texture_object *tObj
 603                = _mesa_lookup_texture(fxMesa->glCtx, id);
 604             tdfxTMFreeTexture(fxMesa, tObj);
 605          }
 606       }
 607
 608       tdfxTMClose(fxMesa);  /* free texture memory */
 609
 610       _swsetup_DestroyContext( fxMesa->glCtx );
 611       _tnl_DestroyContext( fxMesa->glCtx );
 612       _ac_DestroyContext( fxMesa->glCtx );
 613       _swrast_DestroyContext( fxMesa->glCtx );
 614
 615       tdfxFreeVB( fxMesa->glCtx );
 616
 617       /* Free Mesa context */
 618       fxMesa->glCtx->DriverCtx = NULL;
 619       _mesa_destroy_context(fxMesa->glCtx);
 620
 621       /* free the tdfx context */
 622       FREE( fxMesa );
 623    }
 624 }
 625
 626
 627 GLboolean
 628 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 629 {
 630    GET_CURRENT_CONTEXT(ctx);
 631    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 632
 633    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 634       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 635    }
 636
 637    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 638       LOCK_HARDWARE(fxMesa);
 639       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 640       UNLOCK_HARDWARE(fxMesa);
 641    }
 642    return GL_TRUE;
 643 }
 644
 645
 646 GLboolean
 647 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 648                  __DRIdrawablePrivate *driDrawPriv,
 649                  __DRIdrawablePrivate *driReadPriv )
 650 {
 651    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 652       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 653    }
 654
 655    if ( driContextPriv ) {
 656       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 657       GLcontext *newCtx = newFx->glCtx;
 658       GET_CURRENT_CONTEXT(curCtx);
 659
 660       if ((newFx->driDrawable != driDrawPriv)
 661           || (newFx->driReadable != driReadPriv)) {
 662          newFx->driDrawable = driDrawPriv;
 663          newFx->driReadable = driReadPriv;
 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       driUpdateFramebufferSize(newCtx, driDrawPriv);
 682       if (driDrawPriv != driReadPriv) {
 683          driUpdateFramebufferSize(newCtx, driReadPriv);
 684       }
 685
 686       if ( !newFx->Glide.Initialized ) {
 687          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 688             return GL_FALSE;
 689
 690          LOCK_HARDWARE( newFx );
 691
 692          /* FIXME: Force loading of window information */
 693          newFx->width = 0;
 694          tdfxUpdateClipping(newCtx);
 695          tdfxUploadClipping(newFx);
 696
 697          UNLOCK_HARDWARE( newFx );
 698       } else {
 699          LOCK_HARDWARE( newFx );
 700
 701          newFx->Glide.grSstSelect( newFx->Glide.Board );
 702          newFx->Glide.grGlideSetState( newFx->Glide.State );
 703
 704          tdfxUpdateClipping(newCtx);
 705          tdfxUploadClipping(newFx);
 706
 707          UNLOCK_HARDWARE( newFx );
 708       }
 709
 710       _mesa_make_current( newCtx,
 711                           (GLframebuffer *) driDrawPriv->driverPrivate,
 712                           (GLframebuffer *) driReadPriv->driverPrivate );
 713    } else {
 714       _mesa_make_current( NULL, NULL, NULL );
 715    }
 716
 717    return GL_TRUE;
 718 }
 719
 720
 721 /*
 722  * Enable this to trace calls to various Glide functions.
 723  */
 724 /*#define DEBUG_TRAP*/
 725 #ifdef DEBUG_TRAP
 726 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 727 static void (*real_grDrawPoint)( const void *a );
 728 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 729 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 730                                        void *pointers, FxU32 stride);
 731 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 732
 733 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 734 static void (*real_grGlideGetVertexLayout)( void *layout );
 735 static void (*real_grGlideSetVertexLayout)( const void *layout );
 736
 737 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 738                                      FxU32             startAddress,
 739                                      GrLOD_t           thisLod,
 740                                      GrLOD_t           largeLod,
 741                                      GrAspectRatio_t   aspectRatio,
 742                                      GrTextureFormat_t format,
 743                                      FxU32             evenOdd,
 744                                               void              *data );
 745
 746
 747 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 748 {
 749    printf("%s\n", __FUNCTION__);
 750    (*real_grDrawTriangle)(a, b, c);
 751 }
 752
 753 static void debug_grDrawPoint( const void *a )
 754 {
 755    const float *f = (const float *) a;
 756    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 757    (*real_grDrawPoint)(a);
 758 }
 759
 760 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 761 {
 762    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 763    (*real_grDrawVertexArray)(mode, Count, pointers);
 764 }
 765
 766 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 767                                        void *pointers, FxU32 stride)
 768 {
 769    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 770    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 771 }
 772
 773 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 774 {
 775    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 776           (int) minx, (int) miny, (int) maxx, (int) maxy);
 777    (*real_grClipWindow)(minx, miny, maxx, maxy);
 778 }
 779
 780 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 781 {
 782    (*real_grVertexLayout)(param, offset, mode);
 783 }
 784
 785 static void debug_grGlideGetVertexLayout( void *layout )
 786 {
 787    (*real_grGlideGetVertexLayout)(layout);
 788 }
 789
 790 static void debug_grGlideSetVertexLayout( const void *layout )
 791 {
 792    (*real_grGlideSetVertexLayout)(layout);
 793 }
 794
 795 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 796                                      FxU32             startAddress,
 797                                      GrLOD_t           thisLod,
 798                                      GrLOD_t           largeLod,
 799                                      GrAspectRatio_t   aspectRatio,
 800                                      GrTextureFormat_t format,
 801                                      FxU32             evenOdd,
 802                                      void              *data )
 803 {
 804    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 805                                     aspectRatio, format, evenOdd, data);
 806 }
 807
 808 #endif
 809
 810
 811 /*
 812  * Examine the context's deviceID to determine what kind of 3dfx hardware
 813  * is installed.  dlopen() the appropriate Glide library and initialize
 814  * this context's Glide function pointers.
 815  * Return:  true/false = success/failure
 816  */
 817 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 818 {
 819    static const char *defaultGlide = "libglide3.so";
 820    const char *libName;
 821    void *libHandle;
 822
 823    /*
 824     * XXX this code which selects a Glide library filename given the
 825     * deviceID may need to be cleaned up a bit.
 826     * Non-Linux systems may have different filenames, for example.
 827     */
 828    switch (tmesa->fxScreen->deviceID) {
 829    case PCI_CHIP_BANSHEE:
 830    case PCI_CHIP_VOODOO3:
 831       libName = "libglide3-v3.so";
 832       break;
 833    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 834       libName = "libglide3-v5.so";
 835       break;
 836    default:
 837       {
 838          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 839                  tmesa->fxScreen->deviceID);
 840       }
 841       return GL_FALSE;
 842    }
 843
 844    libHandle = dlopen(libName, RTLD_NOW);
 845    if (!libHandle) {
 846       /* The device-specific Glide library filename didn't work, try the
 847        * old, generic libglide3.so library.
 848        */
 849       libHandle = dlopen(defaultGlide, RTLD_NOW);
 850       if (!libHandle) {
 851          __driUtilMessage(
 852             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 853             libName, defaultGlide);
 854          __driUtilMessage("dlerror() message: %s", dlerror());
 855          return GL_FALSE;
 856       }
 857       libName = defaultGlide;
 858    }
 859
 860    {
 861       const char *env = getenv("LIBGL_DEBUG");
 862       if (env && strstr(env, "verbose")) {
 863          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 864       }
 865    }
 866
 867 #define GET_FUNCTION(PTR, NAME)                                         \
 868    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 869    if (!tmesa->Glide.PTR) {                                             \
 870       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 871               NAME, libName);                                           \
 872    }
 873
 874    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 875    GET_FUNCTION(grDrawLine, "grDrawLine");
 876    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 877    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 878    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 879    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 880    GET_FUNCTION(grBufferClear, "grBufferClear");
 881    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 882    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 883    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 884    GET_FUNCTION(grFinish, "grFinish");
 885    GET_FUNCTION(grFlush, "grFlush");
 886    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 887    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 888 #if 0
 889    /* Not in V3 lib, and not used anyway. */
 890    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 891 #endif
 892    GET_FUNCTION(grSelectContext, "grSelectContext");
 893    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 894    GET_FUNCTION(grSstSelect, "grSstSelect");
 895    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 896    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 897    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 898    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 899    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 900    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 901    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 902    GET_FUNCTION(grClipWindow, "grClipWindow");
 903    GET_FUNCTION(grColorCombine, "grColorCombine");
 904    GET_FUNCTION(grColorMask, "grColorMask");
 905    GET_FUNCTION(grCullMode, "grCullMode");
 906    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 907    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 908    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 909    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 910    GET_FUNCTION(grDepthMask, "grDepthMask");
 911    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 912    GET_FUNCTION(grDitherMode, "grDitherMode");
 913    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 914    GET_FUNCTION(grFogMode, "grFogMode");
 915    GET_FUNCTION(grFogTable, "grFogTable");
 916    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 917    GET_FUNCTION(grSplash, "grSplash");
 918    GET_FUNCTION(grGet, "grGet");
 919    GET_FUNCTION(grGetString, "grGetString");
 920    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 921    GET_FUNCTION(grReset, "grReset");
 922    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 923    GET_FUNCTION(grEnable, "grEnable");
 924    GET_FUNCTION(grDisable, "grDisable");
 925    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 926    GET_FUNCTION(grDepthRange, "grDepthRange");
 927    GET_FUNCTION(grStippleMode, "grStippleMode");
 928    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 929    GET_FUNCTION(grViewport, "grViewport");
 930    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 931    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 932    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 933    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 934    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 935    GET_FUNCTION(grTexSource, "grTexSource");
 936    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 937    GET_FUNCTION(grTexCombine, "grTexCombine");
 938    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 939    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 940    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 941    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 942    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 943    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 944    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 945    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 946    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 947    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 948    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 949    GET_FUNCTION(grLfbLock, "grLfbLock");
 950    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 951    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 952    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 953    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 954    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 955    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 956    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 957    GET_FUNCTION(grGlideInit, "grGlideInit");
 958    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 959    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 960    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 961    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 962    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 963
 964    /* Glide utility functions */
 965    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 966    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 967    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 968
 969    /* DRI functions */
 970    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 971    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 972    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 973    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 974    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 975    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 976    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 977
 978    /*
 979     * Extension functions:
 980     * Just use dlysm() because we want a NULL pointer if the function is
 981     * not found.
 982     */
 983    /* PIXEXT extension */
 984    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 985    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 986    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 987    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 988    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 989    /* COMBINE extension */
 990    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 991    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 992    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 993    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 994    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 995    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 996    /* Texus 2 */
 997    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 998    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 999    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
1000
1001 #ifdef DEBUG_TRAP
1002    /* wrap the drawing functions so we can trap them */
1003    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
1004    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
1005
1006    real_grDrawPoint = tmesa->Glide.grDrawPoint;
1007    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
1008
1009    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
1010    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
1011
1012    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
1013    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
1014
1015    real_grClipWindow = tmesa->Glide.grClipWindow;
1016    tmesa->Glide.grClipWindow = debug_grClipWindow;
1017
1018    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1019    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1020
1021    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1022    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1023
1024    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1025    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1026
1027    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1028    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1029
1030 #endif
1031    return GL_TRUE;
1032 }