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_MESA_program_debug */
  71 /* #define need_GL_NV_vertex_program */
  72 #include "extension_helper.h"
  73
  74
  75 /**
  76  * Common extension strings exported by all cards
  77  */
  78 const struct dri_extension card_extensions[] =
  79 {
  80     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
  81     { "GL_ARB_texture_mirrored_repeat",    NULL },
  82
  83     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  84     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  85     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  86     { "GL_EXT_shared_texture_palette",     NULL },
  87     { "GL_EXT_stencil_wrap",               NULL },
  88     { "GL_EXT_texture_env_add",            NULL },
  89     { "GL_EXT_texture_lod_bias",           NULL },
  90
  91 #ifdef need_GL_ARB_point_parameters
  92     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
  93     { "GL_ARB_point_sprite",               NULL },
  94 #endif
  95 #ifdef need_GL_EXT_secondary_color
  96     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
  97 #endif
  98 #ifdef need_GL_ARB_vertex_program
  99     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 100 #endif
 101 #ifdef need_GL_NV_vertex_program
 102     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 103     { "GL_NV_vertex_program1_1",           NULL },
 104 #endif
 105 #ifdef need_GL_MESA_program_debug
 106     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 107 #endif
 108     { NULL,                                NULL }
 109 };
 110
 111 /**
 112  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 113  */
 114 const struct dri_extension napalm_extensions[] =
 115 {
 116     { "GL_ARB_texture_env_combine",        NULL },
 117     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 118     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 119     { "GL_EXT_texture_compression_s3tc",   NULL },
 120     { "GL_EXT_texture_env_combine",        NULL },
 121
 122     { "GL_3DFX_texture_compression_FXT1",  NULL },
 123     { "GL_NV_blend_square",                NULL },
 124     { "GL_S3_s3tc",                        NULL },
 125     { NULL,                                NULL }
 126 };
 127
 128 /*
 129  * Enable/Disable the extensions for this context.
 130  */
 131 static void tdfxDDInitExtensions( GLcontext *ctx )
 132 {
 133    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 134
 135    driInitExtensions( ctx, card_extensions, GL_FALSE );
 136
 137    if ( fxMesa->haveTwoTMUs ) {
 138       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 139    }
 140
 141    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 142       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 143    } else {
 144       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 145    }
 146 }
 147
 148
 149
 150 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 151    &_tnl_vertex_transform_stage,
 152    &_tnl_normal_transform_stage,
 153    &_tnl_lighting_stage,
 154    &_tnl_fog_coordinate_stage,
 155    &_tnl_texgen_stage,
 156    &_tnl_texture_transform_stage,
 157    &_tnl_point_attenuation_stage,
 158    &_tnl_render_stage,
 159    0,
 160 };
 161
 162 static const struct dri_debug_control debug_control[] =
 163 {
 164     { "dri",   DEBUG_VERBOSE_DRI },
 165     { "sync",  DEBUG_ALWAYS_SYNC },
 166     { "api",   DEBUG_VERBOSE_API },
 167     { "fall",  DEBUG_VERBOSE_FALL },
 168     { NULL,    0 }
 169 };
 170
 171 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 172                              __DRIcontextPrivate *driContextPriv,
 173                              void *sharedContextPrivate )
 174 {
 175    tdfxContextPtr fxMesa;
 176    GLcontext *ctx, *shareCtx;
 177    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 178    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 179    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 180                                               sizeof(drm_sarea_t));
 181    struct dd_function_table functions;
 182
 183    /* Allocate tdfx context */
 184    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 185    if (!fxMesa)
 186       return GL_FALSE;
 187
 188    /* Init default driver functions then plug in our tdfx-specific functions
 189     * (the texture functions are especially important)
 190     */
 191    _mesa_init_driver_functions(&functions);
 192    tdfxDDInitDriverFuncs(mesaVis, &functions);
 193    tdfxInitTextureFuncs(&functions);
 194    tdfxInitRenderFuncs(&functions);
 195
 196    /* Allocate the Mesa context */
 197    if (sharedContextPrivate)
 198       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 199    else
 200       shareCtx = NULL;
 201
 202    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 203                                         &functions, (void *) fxMesa);
 204    if (!fxMesa->glCtx) {
 205       FREE(fxMesa);
 206       return GL_FALSE;
 207    }
 208    driContextPriv->driverPrivate = fxMesa;
 209
 210    /* Mirror some important DRI state
 211     */
 212    fxMesa->hHWContext = driContextPriv->hHWContext;
 213    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 214    fxMesa->driFd = sPriv->fd;
 215
 216    fxMesa->driScreen = sPriv;
 217    fxMesa->driContext = driContextPriv;
 218    fxMesa->fxScreen = fxScreen;
 219    fxMesa->sarea = saPriv;
 220
 221    /*JJJ - really?*/
 222    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 223                            ((mesaVis->greenBits == 8) ||
 224                             (mesaVis->depthBits == 0)) );
 225    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 226                              mesaVis->stencilBits &&
 227                              mesaVis->depthBits == 24 );
 228
 229    fxMesa->screen_width = fxScreen->width;
 230    fxMesa->screen_height = fxScreen->height;
 231
 232    fxMesa->new_gl_state = ~0;
 233    fxMesa->new_state = ~0;
 234    fxMesa->dirty = ~0;
 235
 236    /* Parse configuration files */
 237    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 238                         fxMesa->driScreen->myNum, "tdfx");
 239
 240    /* NOTE: This must be here before any Glide calls! */
 241    if (!tdfxInitGlide( fxMesa )) {
 242       FREE(fxMesa);
 243       return GL_FALSE;
 244    }
 245
 246    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 247               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 248               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 249               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 250               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 251               &saPriv->fifoRead );
 252
 253    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 254       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 255    } else {
 256       fxMesa->Glide.SwapInterval = 0;
 257    }
 258    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 259       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 260    } else {
 261       fxMesa->Glide.MaxPendingSwaps = 2;
 262    }
 263
 264    fxMesa->Glide.Initialized = GL_FALSE;
 265    fxMesa->Glide.Board = 0;
 266
 267
 268    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 269       fxMesa->haveTwoTMUs = GL_FALSE;
 270    }
 271    else {
 272       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 273          fxMesa->haveTwoTMUs = GL_FALSE;
 274       } else {
 275          fxMesa->haveTwoTMUs = GL_TRUE;
 276       }
 277    }
 278
 279    fxMesa->stats.swapBuffer = 0;
 280    fxMesa->stats.reqTexUpload = 0;
 281    fxMesa->stats.texUpload = 0;
 282    fxMesa->stats.memTexUpload = 0;
 283
 284    fxMesa->tmuSrc = TDFX_TMU_NONE;
 285
 286    ctx = fxMesa->glCtx;
 287    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 288       ctx->Const.MaxTextureLevels = 12;
 289    } else {
 290       ctx->Const.MaxTextureLevels = 9;
 291    }
 292    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 293    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 294    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 295
 296    /* No wide points.
 297     */
 298    ctx->Const.MinPointSize = 1.0;
 299    ctx->Const.MinPointSizeAA = 1.0;
 300    ctx->Const.MaxPointSize = 1.0;
 301    ctx->Const.MaxPointSizeAA = 1.0;
 302
 303    /* Disable wide lines as we can't antialias them correctly in
 304     * hardware.
 305     */
 306    ctx->Const.MinLineWidth = 1.0;
 307    ctx->Const.MinLineWidthAA = 1.0;
 308    ctx->Const.MaxLineWidth = 1.0;
 309    ctx->Const.MaxLineWidthAA = 1.0;
 310    ctx->Const.LineWidthGranularity = 1.0;
 311
 312    ctx->Const.MaxDrawBuffers = 1;
 313
 314    /* Initialize the software rasterizer and helper modules.
 315     */
 316    _swrast_CreateContext( ctx );
 317    _vbo_CreateContext( ctx );
 318    _tnl_CreateContext( ctx );
 319    _swsetup_CreateContext( ctx );
 320
 321    /* Install the customized pipeline:
 322     */
 323    _tnl_destroy_pipeline( ctx );
 324    _tnl_install_pipeline( ctx, tdfx_pipeline );
 325
 326    /* Configure swrast and T&L to match hardware characteristics:
 327     */
 328    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 329    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 330    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 331    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 332
 333    tdfxDDInitExtensions( ctx );
 334    /* XXX these should really go right after _mesa_init_driver_functions() */
 335    tdfxDDInitSpanFuncs( ctx );
 336    tdfxDDInitStateFuncs( ctx );
 337    tdfxDDInitTriFuncs( ctx );
 338    tdfxInitVB( ctx );
 339    tdfxInitState( fxMesa );
 340
 341 #if DO_DEBUG
 342    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 343 #endif
 344
 345    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 346       fprintf(stderr, "disabling 3D acceleration\n");
 347       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 348    }
 349
 350    return GL_TRUE;
 351 }
 352
 353
 354 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 355 {
 356    FxI32 result;
 357    int i;
 358
 359    LOCK_HARDWARE( fxMesa );
 360
 361    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 362    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 363       fxMesa->layout[i] = MALLOC( result );
 364       if ( !fxMesa->layout[i] ) {
 365          UNLOCK_HARDWARE( fxMesa );
 366          return GL_FALSE;
 367       }
 368    }
 369
 370    /* Tiny vertex format - 16 bytes.
 371     */
 372    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 373    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 374    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 375    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 376    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 377    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 378
 379    /* Non textured vertex format - 24 bytes (Need w for table fog)
 380     */
 381    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 382    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 383    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 384    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 385    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 386    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 387    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 388
 389    /* Single textured vertex format - 32 bytes.
 390     */
 391    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 392    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 393    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 394    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 395    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 396    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 397    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 398    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 399
 400    /* Multitextured vertex format - 40 bytes.
 401     */
 402    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 403    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 404    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 405    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 406    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 407    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 408    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 409    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 410    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 411
 412    /* Projected texture vertex format - 36 bytes.
 413     */
 414    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 415    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 416    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 417    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 418    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 419    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 420    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 421    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 422    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 423
 424    /* Projected multitexture vertex format - 48 bytes.
 425     */
 426    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 427    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 428    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 429    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 430    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 431    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 432    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 433    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 434    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 435    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 436    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 437
 438    UNLOCK_HARDWARE( fxMesa );
 439
 440    return GL_TRUE;
 441 }
 442
 443
 444 /*
 445  * Initialize the state in an tdfxContextPtr struct.
 446  */
 447 static GLboolean
 448 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 449 {
 450    /* KW: Would be nice to make one of these a member of the other.
 451     */
 452    FxI32 result[2];
 453    const char *gext;
 454
 455    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 456       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 457    }
 458
 459 #if DEBUG_LOCKING
 460    fprintf(stderr, "Debug locking enabled\n");
 461 #endif
 462
 463    if ( fxMesa->Glide.Initialized )
 464       return GL_TRUE;
 465
 466    fxMesa->width = driDrawPriv->w;
 467    fxMesa->height = driDrawPriv->h;
 468
 469    /* We have to use a light lock here, because we can't do any glide
 470     * operations yet. No use of FX_* functions in this function.
 471     */
 472    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 473
 474    fxMesa->Glide.grGlideInit();
 475    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 476
 477    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 478                                          GR_RESOLUTION_NONE,
 479                                          GR_REFRESH_NONE,
 480                                          fxMesa->Glide.ColorFormat,
 481                                          fxMesa->Glide.Origin,
 482                                          2, 1 );
 483
 484    fxMesa->Glide.grDRIResetSAREA();
 485
 486    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 487
 488    if ( !fxMesa->Glide.Context )
 489       return GL_FALSE;
 490
 491
 492    /* Perform the Glide-dependant part of the context initialization.
 493     */
 494    FX_grColorMaskv( fxMesa->glCtx, true4 );
 495
 496    tdfxTMInit( fxMesa );
 497
 498    LOCK_HARDWARE( fxMesa );
 499
 500    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 501    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 502    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 503    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 504    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 505    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 506    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 507    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 508    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 509    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 510    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 511
 512    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 513       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 514    } else {
 515       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 516    }
 517
 518    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 519
 520    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 521    fxMesa->Glide.TextureAlign = result[0];
 522
 523    fxMesa->Glide.State = NULL;
 524    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 525    fxMesa->Glide.State = MALLOC( result[0] );
 526
 527    fxMesa->Fog.Table = NULL;
 528    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 529    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 530
 531    UNLOCK_HARDWARE( fxMesa );
 532
 533    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 534       if ( fxMesa->Glide.State )
 535          FREE( fxMesa->Glide.State );
 536       if ( fxMesa->Fog.Table )
 537          FREE( fxMesa->Fog.Table );
 538       return GL_FALSE;
 539    }
 540
 541    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 542       return GL_FALSE;
 543    }
 544
 545    LOCK_HARDWARE( fxMesa );
 546
 547    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 548
 549    if ( getenv( "FX_GLIDE_INFO" ) ) {
 550       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 551       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 552       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 553       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 554       printf( "GR_EXTENSION = %s\n", (char *) gext );
 555    }
 556
 557    UNLOCK_HARDWARE( fxMesa );
 558
 559    fxMesa->numClipRects = 0;
 560    fxMesa->pClipRects = NULL;
 561    fxMesa->scissoredClipRects = GL_FALSE;
 562
 563    fxMesa->Glide.Initialized = GL_TRUE;
 564
 565    return GL_TRUE;
 566 }
 567
 568
 569 void
 570 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 571 {
 572    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 573
 574    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 575       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 576    }
 577
 578    if ( fxMesa ) {
 579       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 580          /* This share group is about to go away, free our private
 581           * texture object data.
 582           */
 583          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 584          GLuint id;
 585          for (id = _mesa_HashFirstEntry(textures);
 586               id;
 587               id = _mesa_HashNextEntry(textures, id)) {
 588             struct gl_texture_object *tObj
 589                = _mesa_lookup_texture(fxMesa->glCtx, id);
 590             tdfxTMFreeTexture(fxMesa, tObj);
 591          }
 592       }
 593
 594       tdfxTMClose(fxMesa);  /* free texture memory */
 595
 596       _swsetup_DestroyContext( fxMesa->glCtx );
 597       _tnl_DestroyContext( fxMesa->glCtx );
 598       _vbo_DestroyContext( fxMesa->glCtx );
 599       _swrast_DestroyContext( fxMesa->glCtx );
 600
 601       tdfxFreeVB( fxMesa->glCtx );
 602
 603       /* Free Mesa context */
 604       fxMesa->glCtx->DriverCtx = NULL;
 605       _mesa_destroy_context(fxMesa->glCtx);
 606
 607       /* free the tdfx context */
 608       FREE( fxMesa );
 609    }
 610 }
 611
 612
 613 GLboolean
 614 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 615 {
 616    GET_CURRENT_CONTEXT(ctx);
 617    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 618
 619    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 620       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 621    }
 622
 623    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 624       LOCK_HARDWARE(fxMesa);
 625       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 626       UNLOCK_HARDWARE(fxMesa);
 627    }
 628    return GL_TRUE;
 629 }
 630
 631
 632 GLboolean
 633 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 634                  __DRIdrawablePrivate *driDrawPriv,
 635                  __DRIdrawablePrivate *driReadPriv )
 636 {
 637    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 638       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 639    }
 640
 641    if ( driContextPriv ) {
 642       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 643       GLcontext *newCtx = newFx->glCtx;
 644       GET_CURRENT_CONTEXT(curCtx);
 645
 646       if ((newFx->driDrawable != driDrawPriv)
 647           || (newFx->driReadable != driReadPriv)) {
 648          newFx->driDrawable = driDrawPriv;
 649          newFx->driReadable = driReadPriv;
 650          newFx->dirty = ~0;
 651       }
 652       else {
 653          if (curCtx == newCtx) {
 654             /* same drawable, same context -> no-op */
 655             /* Need to call _mesa_make_current2() in order to make sure API
 656              * dispatch is set correctly.
 657              */
 658             _mesa_make_current( newCtx,
 659                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 660                                 (GLframebuffer *) driReadPriv->driverPrivate );
 661             return GL_TRUE;
 662          }
 663          /* [dBorca] tunnel2 requires this */
 664          newFx->dirty = ~0;
 665       }
 666
 667       driUpdateFramebufferSize(newCtx, driDrawPriv);
 668       if (driDrawPriv != driReadPriv) {
 669          driUpdateFramebufferSize(newCtx, driReadPriv);
 670       }
 671
 672       if ( !newFx->Glide.Initialized ) {
 673          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 674             return GL_FALSE;
 675
 676          LOCK_HARDWARE( newFx );
 677
 678          /* FIXME: Force loading of window information */
 679          newFx->width = 0;
 680          tdfxUpdateClipping(newCtx);
 681          tdfxUploadClipping(newFx);
 682
 683          UNLOCK_HARDWARE( newFx );
 684       } else {
 685          LOCK_HARDWARE( newFx );
 686
 687          newFx->Glide.grSstSelect( newFx->Glide.Board );
 688          newFx->Glide.grGlideSetState( newFx->Glide.State );
 689
 690          tdfxUpdateClipping(newCtx);
 691          tdfxUploadClipping(newFx);
 692
 693          UNLOCK_HARDWARE( newFx );
 694       }
 695
 696       _mesa_make_current( newCtx,
 697                           (GLframebuffer *) driDrawPriv->driverPrivate,
 698                           (GLframebuffer *) driReadPriv->driverPrivate );
 699    } else {
 700       _mesa_make_current( NULL, NULL, NULL );
 701    }
 702
 703    return GL_TRUE;
 704 }
 705
 706
 707 /*
 708  * Enable this to trace calls to various Glide functions.
 709  */
 710 /*#define DEBUG_TRAP*/
 711 #ifdef DEBUG_TRAP
 712 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 713 static void (*real_grDrawPoint)( const void *a );
 714 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 715 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 716                                        void *pointers, FxU32 stride);
 717 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 718
 719 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 720 static void (*real_grGlideGetVertexLayout)( void *layout );
 721 static void (*real_grGlideSetVertexLayout)( const void *layout );
 722
 723 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 724                                      FxU32             startAddress,
 725                                      GrLOD_t           thisLod,
 726                                      GrLOD_t           largeLod,
 727                                      GrAspectRatio_t   aspectRatio,
 728                                      GrTextureFormat_t format,
 729                                      FxU32             evenOdd,
 730                                               void              *data );
 731
 732
 733 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 734 {
 735    printf("%s\n", __FUNCTION__);
 736    (*real_grDrawTriangle)(a, b, c);
 737 }
 738
 739 static void debug_grDrawPoint( const void *a )
 740 {
 741    const float *f = (const float *) a;
 742    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 743    (*real_grDrawPoint)(a);
 744 }
 745
 746 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 747 {
 748    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 749    (*real_grDrawVertexArray)(mode, Count, pointers);
 750 }
 751
 752 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 753                                        void *pointers, FxU32 stride)
 754 {
 755    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 756    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 757 }
 758
 759 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 760 {
 761    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 762           (int) minx, (int) miny, (int) maxx, (int) maxy);
 763    (*real_grClipWindow)(minx, miny, maxx, maxy);
 764 }
 765
 766 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 767 {
 768    (*real_grVertexLayout)(param, offset, mode);
 769 }
 770
 771 static void debug_grGlideGetVertexLayout( void *layout )
 772 {
 773    (*real_grGlideGetVertexLayout)(layout);
 774 }
 775
 776 static void debug_grGlideSetVertexLayout( const void *layout )
 777 {
 778    (*real_grGlideSetVertexLayout)(layout);
 779 }
 780
 781 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 782                                      FxU32             startAddress,
 783                                      GrLOD_t           thisLod,
 784                                      GrLOD_t           largeLod,
 785                                      GrAspectRatio_t   aspectRatio,
 786                                      GrTextureFormat_t format,
 787                                      FxU32             evenOdd,
 788                                      void              *data )
 789 {
 790    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 791                                     aspectRatio, format, evenOdd, data);
 792 }
 793
 794 #endif
 795
 796
 797 /*
 798  * Examine the context's deviceID to determine what kind of 3dfx hardware
 799  * is installed.  dlopen() the appropriate Glide library and initialize
 800  * this context's Glide function pointers.
 801  * Return:  true/false = success/failure
 802  */
 803 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 804 {
 805    static const char *defaultGlide = "libglide3.so";
 806    const char *libName;
 807    void *libHandle;
 808
 809    /*
 810     * XXX this code which selects a Glide library filename given the
 811     * deviceID may need to be cleaned up a bit.
 812     * Non-Linux systems may have different filenames, for example.
 813     */
 814    switch (tmesa->fxScreen->deviceID) {
 815    case PCI_CHIP_BANSHEE:
 816    case PCI_CHIP_VOODOO3:
 817       libName = "libglide3-v3.so";
 818       break;
 819    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 820       libName = "libglide3-v5.so";
 821       break;
 822    default:
 823       {
 824          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 825                  tmesa->fxScreen->deviceID);
 826       }
 827       return GL_FALSE;
 828    }
 829
 830    libHandle = dlopen(libName, RTLD_NOW);
 831    if (!libHandle) {
 832       /* The device-specific Glide library filename didn't work, try the
 833        * old, generic libglide3.so library.
 834        */
 835       libHandle = dlopen(defaultGlide, RTLD_NOW);
 836       if (!libHandle) {
 837          __driUtilMessage(
 838             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 839             libName, defaultGlide);
 840          __driUtilMessage("dlerror() message: %s", dlerror());
 841          return GL_FALSE;
 842       }
 843       libName = defaultGlide;
 844    }
 845
 846    {
 847       const char *env = getenv("LIBGL_DEBUG");
 848       if (env && strstr(env, "verbose")) {
 849          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 850       }
 851    }
 852
 853 #define GET_FUNCTION(PTR, NAME)                                         \
 854    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 855    if (!tmesa->Glide.PTR) {                                             \
 856       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 857               NAME, libName);                                           \
 858    }
 859
 860    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 861    GET_FUNCTION(grDrawLine, "grDrawLine");
 862    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 863    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 864    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 865    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 866    GET_FUNCTION(grBufferClear, "grBufferClear");
 867    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 868    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 869    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 870    GET_FUNCTION(grFinish, "grFinish");
 871    GET_FUNCTION(grFlush, "grFlush");
 872    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 873    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 874 #if 0
 875    /* Not in V3 lib, and not used anyway. */
 876    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 877 #endif
 878    GET_FUNCTION(grSelectContext, "grSelectContext");
 879    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 880    GET_FUNCTION(grSstSelect, "grSstSelect");
 881    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 882    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 883    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 884    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 885    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 886    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 887    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 888    GET_FUNCTION(grClipWindow, "grClipWindow");
 889    GET_FUNCTION(grColorCombine, "grColorCombine");
 890    GET_FUNCTION(grColorMask, "grColorMask");
 891    GET_FUNCTION(grCullMode, "grCullMode");
 892    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 893    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 894    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 895    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 896    GET_FUNCTION(grDepthMask, "grDepthMask");
 897    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 898    GET_FUNCTION(grDitherMode, "grDitherMode");
 899    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 900    GET_FUNCTION(grFogMode, "grFogMode");
 901    GET_FUNCTION(grFogTable, "grFogTable");
 902    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 903    GET_FUNCTION(grSplash, "grSplash");
 904    GET_FUNCTION(grGet, "grGet");
 905    GET_FUNCTION(grGetString, "grGetString");
 906    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 907    GET_FUNCTION(grReset, "grReset");
 908    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 909    GET_FUNCTION(grEnable, "grEnable");
 910    GET_FUNCTION(grDisable, "grDisable");
 911    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 912    GET_FUNCTION(grDepthRange, "grDepthRange");
 913    GET_FUNCTION(grStippleMode, "grStippleMode");
 914    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 915    GET_FUNCTION(grViewport, "grViewport");
 916    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 917    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 918    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 919    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 920    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 921    GET_FUNCTION(grTexSource, "grTexSource");
 922    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 923    GET_FUNCTION(grTexCombine, "grTexCombine");
 924    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 925    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 926    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 927    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 928    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 929    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 930    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 931    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 932    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 933    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 934    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 935    GET_FUNCTION(grLfbLock, "grLfbLock");
 936    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 937    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 938    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 939    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 940    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 941    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 942    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 943    GET_FUNCTION(grGlideInit, "grGlideInit");
 944    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 945    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 946    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 947    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 948    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 949
 950    /* Glide utility functions */
 951    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 952    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 953    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 954
 955    /* DRI functions */
 956    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 957    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 958    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 959    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 960    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 961    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 962    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 963
 964    /*
 965     * Extension functions:
 966     * Just use dlysm() because we want a NULL pointer if the function is
 967     * not found.
 968     */
 969    /* PIXEXT extension */
 970    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 971    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 972    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 973    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 974    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 975    /* COMBINE extension */
 976    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 977    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 978    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 979    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 980    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 981    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 982    /* Texus 2 */
 983    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 984    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 985    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 986
 987 #ifdef DEBUG_TRAP
 988    /* wrap the drawing functions so we can trap them */
 989    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 990    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 991
 992    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 993    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
 994
 995    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
 996    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
 997
 998    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
 999    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
1000
1001    real_grClipWindow = tmesa->Glide.grClipWindow;
1002    tmesa->Glide.grClipWindow = debug_grClipWindow;
1003
1004    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1005    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1006
1007    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1008    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1009
1010    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1011    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1012
1013    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1014    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1015
1016 #endif
1017    return GL_TRUE;
1018 }