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

   1 /* -*- mode: c; c-basic-offset: 3 -*-
   2  *
   3  * Copyright 2000 VA Linux Systems Inc., Fremont, California.
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 /**
  28  * \file tdfx_context.c
  29  * Context management functions for 3Dfx hardware.
  30  *
  31  * \author Gareth Hughes <gareth@valinux.com> (original rewrite 29 Sep - 1 Oct 2000)
  32  * \author Brian Paul <brianp@valinux.com>
  33  * \author Daniel Borca <dborca@users.sourceforge.net> (new fixes 19 Jul 2004)
  34  */
  35
  36 #include <dlfcn.h>
  37 #include "tdfx_context.h"
  38 #include "tdfx_dd.h"
  39 #include "tdfx_state.h"
  40 #include "tdfx_vb.h"
  41 #include "tdfx_tex.h"
  42 #include "tdfx_tris.h"
  43 #include "tdfx_render.h"
  44 #include "tdfx_span.h"
  45 #include "tdfx_texman.h"
  46 #include "main/extensions.h"
  47 #include "main/hash.h"
  48 #include "main/texobj.h"
  49
  50 #include "swrast/swrast.h"
  51 #include "swrast_setup/swrast_setup.h"
  52 #include "vbo/vbo.h"
  53
  54 #include "tnl/tnl.h"
  55 #include "tnl/t_pipeline.h"
  56
  57 #include "drivers/common/driverfuncs.h"
  58
  59 #include "utils.h"
  60
  61 /* #define need_GL_ARB_point_parameters */
  62 #define need_GL_ARB_occlusion_query
  63 /* #define need_GL_ARB_vertex_program */
  64 #define need_GL_EXT_blend_equation_separate
  65 #define need_GL_EXT_blend_func_separate
  66 #define need_GL_EXT_blend_minmax
  67 #define need_GL_EXT_fog_coord
  68 #define need_GL_EXT_paletted_texture
  69 /* #define need_GL_EXT_secondary_color */
  70 /* #define need_GL_NV_vertex_program */
  71 #include "main/remap_helper.h"
  72
  73
  74 /**
  75  * Common extension strings exported by all cards
  76  */
  77 static const struct dri_extension card_extensions[] =
  78 {
  79     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
  80     { "GL_ARB_texture_mirrored_repeat",    NULL },
  81
  82     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  83     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  84     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  85     { "GL_EXT_shared_texture_palette",     NULL },
  86     { "GL_EXT_stencil_wrap",               NULL },
  87     { "GL_EXT_texture_env_add",            NULL },
  88     { "GL_EXT_texture_lod_bias",           NULL },
  89
  90 #ifdef need_GL_ARB_point_parameters
  91     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
  92     { "GL_ARB_point_sprite",               NULL },
  93 #endif
  94 #ifdef need_GL_EXT_secondary_color
  95     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
  96 #endif
  97 #ifdef need_GL_ARB_vertex_program
  98     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
  99 #endif
 100 #ifdef need_GL_NV_vertex_program
 101     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 102     { "GL_NV_vertex_program1_1",           NULL },
 103 #endif
 104     { NULL,                                NULL }
 105 };
 106
 107 /**
 108  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 109  */
 110 static const struct dri_extension napalm_extensions[] =
 111 {
 112     { "GL_ARB_texture_env_combine",        NULL },
 113     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 114     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 115     { "GL_EXT_texture_compression_s3tc",   NULL },
 116     { "GL_EXT_texture_env_combine",        NULL },
 117
 118     { "GL_3DFX_texture_compression_FXT1",  NULL },
 119     { "GL_NV_blend_square",                NULL },
 120     { "GL_S3_s3tc",                        NULL },
 121     { NULL,                                NULL }
 122 };
 123
 124 /*
 125  * Enable/Disable the extensions for this context.
 126  */
 127 static void tdfxDDInitExtensions( GLcontext *ctx )
 128 {
 129    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 130
 131    driInitExtensions( ctx, card_extensions, GL_FALSE );
 132
 133    if ( fxMesa->haveTwoTMUs ) {
 134       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 135    }
 136
 137    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 138       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 139    } else {
 140       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 141    }
 142 }
 143
 144
 145
 146 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 147    &_tnl_vertex_transform_stage,
 148    &_tnl_normal_transform_stage,
 149    &_tnl_lighting_stage,
 150    &_tnl_fog_coordinate_stage,
 151    &_tnl_texgen_stage,
 152    &_tnl_texture_transform_stage,
 153    &_tnl_point_attenuation_stage,
 154    &_tnl_render_stage,
 155    0,
 156 };
 157
 158 static const struct dri_debug_control debug_control[] =
 159 {
 160     { "dri",   DEBUG_VERBOSE_DRI },
 161     { "sync",  DEBUG_ALWAYS_SYNC },
 162     { "api",   DEBUG_VERBOSE_API },
 163     { "fall",  DEBUG_VERBOSE_FALL },
 164     { NULL,    0 }
 165 };
 166
 167 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 168                              __DRIcontext *driContextPriv,
 169                              void *sharedContextPrivate )
 170 {
 171    tdfxContextPtr fxMesa;
 172    GLcontext *ctx, *shareCtx;
 173    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 174    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 175    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 176                                               sizeof(drm_sarea_t));
 177    struct dd_function_table functions;
 178
 179    /* Allocate tdfx context */
 180    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 181    if (!fxMesa)
 182       return GL_FALSE;
 183
 184    /* Init default driver functions then plug in our tdfx-specific functions
 185     * (the texture functions are especially important)
 186     */
 187    _mesa_init_driver_functions(&functions);
 188    tdfxDDInitDriverFuncs(mesaVis, &functions);
 189    tdfxInitTextureFuncs(&functions);
 190    tdfxInitRenderFuncs(&functions);
 191
 192    /* Allocate the Mesa context */
 193    if (sharedContextPrivate)
 194       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 195    else
 196       shareCtx = NULL;
 197
 198    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 199                                         &functions, (void *) fxMesa);
 200    if (!fxMesa->glCtx) {
 201       FREE(fxMesa);
 202       return GL_FALSE;
 203    }
 204    driContextPriv->driverPrivate = fxMesa;
 205
 206    /* Mirror some important DRI state
 207     */
 208    fxMesa->hHWContext = driContextPriv->hHWContext;
 209    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 210    fxMesa->driFd = sPriv->fd;
 211
 212    fxMesa->driScreen = sPriv;
 213    fxMesa->driContext = driContextPriv;
 214    fxMesa->fxScreen = fxScreen;
 215    fxMesa->sarea = saPriv;
 216
 217    /*JJJ - really?*/
 218    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 219                            ((mesaVis->greenBits == 8) ||
 220                             (mesaVis->depthBits == 0)) );
 221    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 222                              mesaVis->stencilBits &&
 223                              mesaVis->depthBits == 24 );
 224
 225    fxMesa->screen_width = fxScreen->width;
 226    fxMesa->screen_height = fxScreen->height;
 227
 228    fxMesa->new_gl_state = ~0;
 229    fxMesa->new_state = ~0;
 230    fxMesa->dirty = ~0;
 231
 232    /* Parse configuration files */
 233    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 234                         fxMesa->driScreen->myNum, "tdfx");
 235
 236    /* NOTE: This must be here before any Glide calls! */
 237    if (!tdfxInitGlide( fxMesa )) {
 238       FREE(fxMesa);
 239       return GL_FALSE;
 240    }
 241
 242    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 243               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 244               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 245               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 246               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 247               &saPriv->fifoRead );
 248
 249    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 250       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 251    } else {
 252       fxMesa->Glide.SwapInterval = 0;
 253    }
 254    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 255       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 256    } else {
 257       fxMesa->Glide.MaxPendingSwaps = 2;
 258    }
 259
 260    fxMesa->Glide.Initialized = GL_FALSE;
 261    fxMesa->Glide.Board = 0;
 262
 263
 264    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 265       fxMesa->haveTwoTMUs = GL_FALSE;
 266    }
 267    else {
 268       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 269          fxMesa->haveTwoTMUs = GL_FALSE;
 270       } else {
 271          fxMesa->haveTwoTMUs = GL_TRUE;
 272       }
 273    }
 274
 275    fxMesa->stats.swapBuffer = 0;
 276    fxMesa->stats.reqTexUpload = 0;
 277    fxMesa->stats.texUpload = 0;
 278    fxMesa->stats.memTexUpload = 0;
 279
 280    fxMesa->tmuSrc = TDFX_TMU_NONE;
 281
 282    ctx = fxMesa->glCtx;
 283    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 284       ctx->Const.MaxTextureLevels = 12;
 285    } else {
 286       ctx->Const.MaxTextureLevels = 9;
 287    }
 288    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 289    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 290    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 291
 292    /* No wide points.
 293     */
 294    ctx->Const.MinPointSize = 1.0;
 295    ctx->Const.MinPointSizeAA = 1.0;
 296    ctx->Const.MaxPointSize = 1.0;
 297    ctx->Const.MaxPointSizeAA = 1.0;
 298
 299    /* Disable wide lines as we can't antialias them correctly in
 300     * hardware.
 301     */
 302    ctx->Const.MinLineWidth = 1.0;
 303    ctx->Const.MinLineWidthAA = 1.0;
 304    ctx->Const.MaxLineWidth = 1.0;
 305    ctx->Const.MaxLineWidthAA = 1.0;
 306    ctx->Const.LineWidthGranularity = 1.0;
 307
 308    ctx->Const.MaxDrawBuffers = 1;
 309
 310    /* Initialize the software rasterizer and helper modules.
 311     */
 312    _swrast_CreateContext( ctx );
 313    _vbo_CreateContext( ctx );
 314    _tnl_CreateContext( ctx );
 315    _swsetup_CreateContext( ctx );
 316
 317    /* Install the customized pipeline:
 318     */
 319    _tnl_destroy_pipeline( ctx );
 320    _tnl_install_pipeline( ctx, tdfx_pipeline );
 321
 322    /* Configure swrast and T&L to match hardware characteristics:
 323     */
 324    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 325    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 326    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 327    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 328
 329    tdfxDDInitExtensions( ctx );
 330    /* XXX these should really go right after _mesa_init_driver_functions() */
 331    tdfxDDInitSpanFuncs( ctx );
 332    tdfxDDInitStateFuncs( ctx );
 333    tdfxDDInitTriFuncs( ctx );
 334    tdfxInitVB( ctx );
 335    tdfxInitState( fxMesa );
 336
 337 #if DO_DEBUG
 338    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 339 #endif
 340
 341    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 342       fprintf(stderr, "disabling 3D acceleration\n");
 343       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 344    }
 345
 346    return GL_TRUE;
 347 }
 348
 349
 350 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 351 {
 352    FxI32 result;
 353    int i;
 354
 355    LOCK_HARDWARE( fxMesa );
 356
 357    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 358    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 359       fxMesa->layout[i] = MALLOC( result );
 360       if ( !fxMesa->layout[i] ) {
 361          UNLOCK_HARDWARE( fxMesa );
 362          return GL_FALSE;
 363       }
 364    }
 365
 366    /* Tiny vertex format - 16 bytes.
 367     */
 368    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 369    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 370    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 371    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 372    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 373    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 374
 375    /* Non textured vertex format - 24 bytes (Need w for table fog)
 376     */
 377    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 378    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 379    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 380    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 381    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 382    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 383    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 384
 385    /* Single textured vertex format - 32 bytes.
 386     */
 387    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 388    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 389    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 390    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 391    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 392    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 393    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 394    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 395
 396    /* Multitextured vertex format - 40 bytes.
 397     */
 398    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 399    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 403    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 404    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 405    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 406    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 407
 408    /* Projected texture vertex format - 36 bytes.
 409     */
 410    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 411    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 412    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 413    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 414    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 415    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 416    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 417    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 418    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 419
 420    /* Projected multitexture vertex format - 48 bytes.
 421     */
 422    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 423    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 424    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 425    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 426    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 427    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 428    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 429    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 430    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 431    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 432    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 433
 434    UNLOCK_HARDWARE( fxMesa );
 435
 436    return GL_TRUE;
 437 }
 438
 439
 440 /*
 441  * Initialize the state in an tdfxContextPtr struct.
 442  */
 443 static GLboolean
 444 tdfxInitContext( __DRIdrawable *driDrawPriv, tdfxContextPtr fxMesa )
 445 {
 446    /* KW: Would be nice to make one of these a member of the other.
 447     */
 448    FxI32 result[2];
 449    const char *gext;
 450
 451    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 452       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 453    }
 454
 455 #if DEBUG_LOCKING
 456    fprintf(stderr, "Debug locking enabled\n");
 457 #endif
 458
 459    if ( fxMesa->Glide.Initialized )
 460       return GL_TRUE;
 461
 462    fxMesa->width = driDrawPriv->w;
 463    fxMesa->height = driDrawPriv->h;
 464
 465    /* We have to use a light lock here, because we can't do any glide
 466     * operations yet. No use of FX_* functions in this function.
 467     */
 468    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 469
 470    fxMesa->Glide.grGlideInit();
 471    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 472
 473    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 474                                          GR_RESOLUTION_NONE,
 475                                          GR_REFRESH_NONE,
 476                                          fxMesa->Glide.ColorFormat,
 477                                          fxMesa->Glide.Origin,
 478                                          2, 1 );
 479
 480    fxMesa->Glide.grDRIResetSAREA();
 481
 482    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 483
 484    if ( !fxMesa->Glide.Context )
 485       return GL_FALSE;
 486
 487
 488    /* Perform the Glide-dependant part of the context initialization.
 489     */
 490    FX_grColorMaskv( fxMesa->glCtx, true4 );
 491
 492    tdfxTMInit( fxMesa );
 493
 494    LOCK_HARDWARE( fxMesa );
 495
 496    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 497    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 498    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 499    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 500    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 501    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 502    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 503    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 504    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 505    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 506    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 507
 508    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 509       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 510    } else {
 511       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 512    }
 513
 514    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 515
 516    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 517    fxMesa->Glide.TextureAlign = result[0];
 518
 519    fxMesa->Glide.State = NULL;
 520    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 521    fxMesa->Glide.State = MALLOC( result[0] );
 522
 523    fxMesa->Fog.Table = NULL;
 524    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 525    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 526
 527    UNLOCK_HARDWARE( fxMesa );
 528
 529    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 530       if ( fxMesa->Glide.State )
 531          FREE( fxMesa->Glide.State );
 532       if ( fxMesa->Fog.Table )
 533          FREE( fxMesa->Fog.Table );
 534       return GL_FALSE;
 535    }
 536
 537    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 538       return GL_FALSE;
 539    }
 540
 541    LOCK_HARDWARE( fxMesa );
 542
 543    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 544
 545    if ( getenv( "FX_GLIDE_INFO" ) ) {
 546       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 547       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 548       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 549       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 550       printf( "GR_EXTENSION = %s\n", (char *) gext );
 551    }
 552
 553    UNLOCK_HARDWARE( fxMesa );
 554
 555    fxMesa->numClipRects = 0;
 556    fxMesa->pClipRects = NULL;
 557    fxMesa->scissoredClipRects = GL_FALSE;
 558
 559    fxMesa->Glide.Initialized = GL_TRUE;
 560
 561    return GL_TRUE;
 562 }
 563
 564
 565 void
 566 tdfxDestroyContext( __DRIcontext *driContextPriv )
 567 {
 568    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 569
 570    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 571       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 572    }
 573
 574    if ( fxMesa ) {
 575       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 576          /* This share group is about to go away, free our private
 577           * texture object data.
 578           */
 579          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 580          GLuint id;
 581          for (id = _mesa_HashFirstEntry(textures);
 582               id;
 583               id = _mesa_HashNextEntry(textures, id)) {
 584             struct gl_texture_object *tObj
 585                = _mesa_lookup_texture(fxMesa->glCtx, id);
 586             tdfxTMFreeTexture(fxMesa, tObj);
 587          }
 588       }
 589
 590       tdfxTMClose(fxMesa);  /* free texture memory */
 591
 592       _swsetup_DestroyContext( fxMesa->glCtx );
 593       _tnl_DestroyContext( fxMesa->glCtx );
 594       _vbo_DestroyContext( fxMesa->glCtx );
 595       _swrast_DestroyContext( fxMesa->glCtx );
 596
 597       tdfxFreeVB( fxMesa->glCtx );
 598
 599       /* Free Mesa context */
 600       fxMesa->glCtx->DriverCtx = NULL;
 601       _mesa_destroy_context(fxMesa->glCtx);
 602
 603       /* free the tdfx context */
 604       FREE( fxMesa );
 605    }
 606 }
 607
 608
 609 GLboolean
 610 tdfxUnbindContext( __DRIcontext *driContextPriv )
 611 {
 612    GET_CURRENT_CONTEXT(ctx);
 613    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 614
 615    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 616       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 617    }
 618
 619    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 620       LOCK_HARDWARE(fxMesa);
 621       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 622       UNLOCK_HARDWARE(fxMesa);
 623    }
 624    return GL_TRUE;
 625 }
 626
 627
 628 GLboolean
 629 tdfxMakeCurrent( __DRIcontext *driContextPriv,
 630                  __DRIdrawable *driDrawPriv,
 631                  __DRIdrawable *driReadPriv )
 632 {
 633    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 634       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 635    }
 636
 637    if ( driContextPriv ) {
 638       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 639       GLcontext *newCtx = newFx->glCtx;
 640       GET_CURRENT_CONTEXT(curCtx);
 641
 642       if ((newFx->driDrawable != driDrawPriv)
 643           || (newFx->driReadable != driReadPriv)) {
 644          newFx->driDrawable = driDrawPriv;
 645          newFx->driReadable = driReadPriv;
 646          newFx->dirty = ~0;
 647       }
 648       else {
 649          if (curCtx == newCtx) {
 650             /* same drawable, same context -> no-op */
 651             /* Need to call _mesa_make_current2() in order to make sure API
 652              * dispatch is set correctly.
 653              */
 654             _mesa_make_current( newCtx,
 655                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 656                                 (GLframebuffer *) driReadPriv->driverPrivate );
 657             return GL_TRUE;
 658          }
 659          /* [dBorca] tunnel2 requires this */
 660          newFx->dirty = ~0;
 661       }
 662
 663       driUpdateFramebufferSize(newCtx, driDrawPriv);
 664       if (driDrawPriv != driReadPriv) {
 665          driUpdateFramebufferSize(newCtx, driReadPriv);
 666       }
 667
 668       if ( !newFx->Glide.Initialized ) {
 669          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 670             return GL_FALSE;
 671
 672          LOCK_HARDWARE( newFx );
 673
 674          /* FIXME: Force loading of window information */
 675          newFx->width = 0;
 676          tdfxUpdateClipping(newCtx);
 677          tdfxUploadClipping(newFx);
 678
 679          UNLOCK_HARDWARE( newFx );
 680       } else {
 681          LOCK_HARDWARE( newFx );
 682
 683          newFx->Glide.grSstSelect( newFx->Glide.Board );
 684          newFx->Glide.grGlideSetState( newFx->Glide.State );
 685
 686          tdfxUpdateClipping(newCtx);
 687          tdfxUploadClipping(newFx);
 688
 689          UNLOCK_HARDWARE( newFx );
 690       }
 691
 692       _mesa_make_current( newCtx,
 693                           (GLframebuffer *) driDrawPriv->driverPrivate,
 694                           (GLframebuffer *) driReadPriv->driverPrivate );
 695    } else {
 696       _mesa_make_current( NULL, NULL, NULL );
 697    }
 698
 699    return GL_TRUE;
 700 }
 701
 702
 703 /*
 704  * Enable this to trace calls to various Glide functions.
 705  */
 706 /*#define DEBUG_TRAP*/
 707 #ifdef DEBUG_TRAP
 708 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 709 static void (*real_grDrawPoint)( const void *a );
 710 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 711 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 712                                        void *pointers, FxU32 stride);
 713 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 714
 715 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 716 static void (*real_grGlideGetVertexLayout)( void *layout );
 717 static void (*real_grGlideSetVertexLayout)( const void *layout );
 718
 719 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 720                                      FxU32             startAddress,
 721                                      GrLOD_t           thisLod,
 722                                      GrLOD_t           largeLod,
 723                                      GrAspectRatio_t   aspectRatio,
 724                                      GrTextureFormat_t format,
 725                                      FxU32             evenOdd,
 726                                               void              *data );
 727
 728
 729 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 730 {
 731    printf("%s\n", __FUNCTION__);
 732    (*real_grDrawTriangle)(a, b, c);
 733 }
 734
 735 static void debug_grDrawPoint( const void *a )
 736 {
 737    const float *f = (const float *) a;
 738    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 739    (*real_grDrawPoint)(a);
 740 }
 741
 742 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 743 {
 744    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 745    (*real_grDrawVertexArray)(mode, Count, pointers);
 746 }
 747
 748 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 749                                        void *pointers, FxU32 stride)
 750 {
 751    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 752    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 753 }
 754
 755 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 756 {
 757    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 758           (int) minx, (int) miny, (int) maxx, (int) maxy);
 759    (*real_grClipWindow)(minx, miny, maxx, maxy);
 760 }
 761
 762 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 763 {
 764    (*real_grVertexLayout)(param, offset, mode);
 765 }
 766
 767 static void debug_grGlideGetVertexLayout( void *layout )
 768 {
 769    (*real_grGlideGetVertexLayout)(layout);
 770 }
 771
 772 static void debug_grGlideSetVertexLayout( const void *layout )
 773 {
 774    (*real_grGlideSetVertexLayout)(layout);
 775 }
 776
 777 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 778                                      FxU32             startAddress,
 779                                      GrLOD_t           thisLod,
 780                                      GrLOD_t           largeLod,
 781                                      GrAspectRatio_t   aspectRatio,
 782                                      GrTextureFormat_t format,
 783                                      FxU32             evenOdd,
 784                                      void              *data )
 785 {
 786    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 787                                     aspectRatio, format, evenOdd, data);
 788 }
 789
 790 #endif
 791
 792
 793 /*
 794  * Examine the context's deviceID to determine what kind of 3dfx hardware
 795  * is installed.  dlopen() the appropriate Glide library and initialize
 796  * this context's Glide function pointers.
 797  * Return:  true/false = success/failure
 798  */
 799 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 800 {
 801    static const char *defaultGlide = "libglide3.so";
 802    const char *libName;
 803    void *libHandle;
 804
 805    /*
 806     * XXX this code which selects a Glide library filename given the
 807     * deviceID may need to be cleaned up a bit.
 808     * Non-Linux systems may have different filenames, for example.
 809     */
 810    switch (tmesa->fxScreen->deviceID) {
 811    case PCI_CHIP_BANSHEE:
 812    case PCI_CHIP_VOODOO3:
 813       libName = "libglide3-v3.so";
 814       break;
 815    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 816       libName = "libglide3-v5.so";
 817       break;
 818    default:
 819       {
 820          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 821                  tmesa->fxScreen->deviceID);
 822       }
 823       return GL_FALSE;
 824    }
 825
 826    libHandle = dlopen(libName, RTLD_NOW);
 827    if (!libHandle) {
 828       /* The device-specific Glide library filename didn't work, try the
 829        * old, generic libglide3.so library.
 830        */
 831       libHandle = dlopen(defaultGlide, RTLD_NOW);
 832       if (!libHandle) {
 833          __driUtilMessage(
 834             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 835             libName, defaultGlide);
 836          __driUtilMessage("dlerror() message: %s", dlerror());
 837          return GL_FALSE;
 838       }
 839       libName = defaultGlide;
 840    }
 841
 842    {
 843       const char *env = getenv("LIBGL_DEBUG");
 844       if (env && strstr(env, "verbose")) {
 845          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 846       }
 847    }
 848
 849 #define GET_FUNCTION(PTR, NAME)                                         \
 850    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 851    if (!tmesa->Glide.PTR) {                                             \
 852       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 853               NAME, libName);                                           \
 854    }
 855
 856    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 857    GET_FUNCTION(grDrawLine, "grDrawLine");
 858    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 859    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 860    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 861    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 862    GET_FUNCTION(grBufferClear, "grBufferClear");
 863    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 864    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 865    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 866    GET_FUNCTION(grFinish, "grFinish");
 867    GET_FUNCTION(grFlush, "grFlush");
 868    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 869    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 870 #if 0
 871    /* Not in V3 lib, and not used anyway. */
 872    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 873 #endif
 874    GET_FUNCTION(grSelectContext, "grSelectContext");
 875    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 876    GET_FUNCTION(grSstSelect, "grSstSelect");
 877    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 878    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 879    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 880    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 881    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 882    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 883    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 884    GET_FUNCTION(grClipWindow, "grClipWindow");
 885    GET_FUNCTION(grColorCombine, "grColorCombine");
 886    GET_FUNCTION(grColorMask, "grColorMask");
 887    GET_FUNCTION(grCullMode, "grCullMode");
 888    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 889    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 890    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 891    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 892    GET_FUNCTION(grDepthMask, "grDepthMask");
 893    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 894    GET_FUNCTION(grDitherMode, "grDitherMode");
 895    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 896    GET_FUNCTION(grFogMode, "grFogMode");
 897    GET_FUNCTION(grFogTable, "grFogTable");
 898    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 899    GET_FUNCTION(grSplash, "grSplash");
 900    GET_FUNCTION(grGet, "grGet");
 901    GET_FUNCTION(grGetString, "grGetString");
 902    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 903    GET_FUNCTION(grReset, "grReset");
 904    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 905    GET_FUNCTION(grEnable, "grEnable");
 906    GET_FUNCTION(grDisable, "grDisable");
 907    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 908    GET_FUNCTION(grDepthRange, "grDepthRange");
 909    GET_FUNCTION(grStippleMode, "grStippleMode");
 910    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 911    GET_FUNCTION(grViewport, "grViewport");
 912    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 913    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 914    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 915    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 916    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 917    GET_FUNCTION(grTexSource, "grTexSource");
 918    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 919    GET_FUNCTION(grTexCombine, "grTexCombine");
 920    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 921    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 922    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 923    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 924    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 925    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 926    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 927    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 928    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 929    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 930    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 931    GET_FUNCTION(grLfbLock, "grLfbLock");
 932    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 933    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 934    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 935    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 936    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 937    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 938    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 939    GET_FUNCTION(grGlideInit, "grGlideInit");
 940    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 941    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 942    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 943    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 944    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 945
 946    /* Glide utility functions */
 947    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 948    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 949    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 950
 951    /* DRI functions */
 952    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 953    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 954    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 955    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 956    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 957    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 958    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 959
 960    /*
 961     * Extension functions:
 962     * Just use dlysm() because we want a NULL pointer if the function is
 963     * not found.
 964     */
 965    /* PIXEXT extension */
 966    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 967    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 968    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 969    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 970    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 971    /* COMBINE extension */
 972    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 973    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 974    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 975    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 976    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 977    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 978    /* Texus 2 */
 979    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 980    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 981    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 982
 983 #ifdef DEBUG_TRAP
 984    /* wrap the drawing functions so we can trap them */
 985    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 986    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 987
 988    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 989    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
 990
 991    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
 992    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
 993
 994    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
 995    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
 996
 997    real_grClipWindow = tmesa->Glide.grClipWindow;
 998    tmesa->Glide.grClipWindow = debug_grClipWindow;
 999
1000    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1001    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1002
1003    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1004    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1005
1006    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1007    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1008
1009    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1010    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1011
1012 #endif
1013    return GL_TRUE;
1014 }