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_texture_compression
  64 #define need_GL_ARB_vertex_buffer_object
  65 /* #define need_GL_ARB_vertex_program */
  66 #define need_GL_EXT_blend_equation_separate
  67 #define need_GL_EXT_blend_func_separate
  68 #define need_GL_EXT_blend_minmax
  69 #define need_GL_EXT_fog_coord
  70 #define need_GL_EXT_multi_draw_arrays
  71 #define need_GL_EXT_paletted_texture
  72 /* #define need_GL_EXT_secondary_color */
  73 #define need_GL_IBM_multimode_draw_arrays
  74 /* #define need_GL_MESA_program_debug */
  75 /* #define need_GL_NV_vertex_program */
  76 #include "extension_helper.h"
  77
  78
  79 /**
  80  * Common extension strings exported by all cards
  81  */
  82 const struct dri_extension card_extensions[] =
  83 {
  84     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
  85     { "GL_ARB_texture_mirrored_repeat",    NULL },
  86     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
  87
  88     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  89     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  90     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
  91     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  92     { "GL_EXT_shared_texture_palette",     NULL },
  93     { "GL_EXT_stencil_wrap",               NULL },
  94     { "GL_EXT_texture_env_add",            NULL },
  95     { "GL_EXT_texture_lod_bias",           NULL },
  96     { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },
  97
  98 #ifdef need_GL_ARB_point_parameters
  99     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 100     { "GL_ARB_point_sprite",               NULL },
 101 #endif
 102 #ifdef need_GL_EXT_secondary_color
 103     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 104 #endif
 105 #ifdef need_GL_ARB_vertex_program
 106     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 107 #endif
 108 #ifdef need_GL_NV_vertex_program
 109     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 110     { "GL_NV_vertex_program1_1",           NULL },
 111 #endif
 112 #ifdef need_GL_MESA_program_debug
 113     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 114 #endif
 115     { NULL,                                NULL }
 116 };
 117
 118 /**
 119  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 120  */
 121 const struct dri_extension napalm_extensions[] =
 122 {
 123     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 124     { "GL_ARB_texture_env_combine",        NULL },
 125     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 126     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 127     { "GL_EXT_texture_compression_s3tc",   NULL },
 128     { "GL_EXT_texture_env_combine",        NULL },
 129
 130     { "GL_3DFX_texture_compression_FXT1",  NULL },
 131     { "GL_NV_blend_square",                NULL },
 132     { "GL_S3_s3tc",                        NULL },
 133     { NULL,                                NULL }
 134 };
 135
 136 /*
 137  * Enable/Disable the extensions for this context.
 138  */
 139 static void tdfxDDInitExtensions( GLcontext *ctx )
 140 {
 141    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 142
 143    driInitExtensions( ctx, card_extensions, GL_FALSE );
 144
 145    if ( fxMesa->haveTwoTMUs ) {
 146       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 147    }
 148
 149    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 150       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 151    } else {
 152       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 153    }
 154 }
 155
 156
 157
 158 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 159    &_tnl_vertex_transform_stage,
 160    &_tnl_normal_transform_stage,
 161    &_tnl_lighting_stage,
 162    &_tnl_fog_coordinate_stage,
 163    &_tnl_texgen_stage,
 164    &_tnl_texture_transform_stage,
 165    &_tnl_point_attenuation_stage,
 166 #if 0
 167 #if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program)
 168    &_tnl_arb_vertex_program_stage,
 169    &_tnl_vertex_program_stage,
 170 #endif
 171 #endif
 172    &_tnl_render_stage,
 173    0,
 174 };
 175
 176 static const struct dri_debug_control debug_control[] =
 177 {
 178     { "dri",   DEBUG_VERBOSE_DRI },
 179     { "sync",  DEBUG_ALWAYS_SYNC },
 180     { "api",   DEBUG_VERBOSE_API },
 181     { "fall",  DEBUG_VERBOSE_FALL },
 182     { NULL,    0 }
 183 };
 184
 185 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 186                              __DRIcontextPrivate *driContextPriv,
 187                              void *sharedContextPrivate )
 188 {
 189    tdfxContextPtr fxMesa;
 190    GLcontext *ctx, *shareCtx;
 191    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 192    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 193    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 194                                               sizeof(drm_sarea_t));
 195    struct dd_function_table functions;
 196
 197    /* Allocate tdfx context */
 198    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 199    if (!fxMesa)
 200       return GL_FALSE;
 201
 202    /* Init default driver functions then plug in our tdfx-specific functions
 203     * (the texture functions are especially important)
 204     */
 205    _mesa_init_driver_functions(&functions);
 206    tdfxDDInitDriverFuncs(mesaVis, &functions);
 207    tdfxInitTextureFuncs(&functions);
 208    tdfxInitRenderFuncs(&functions);
 209
 210    /* Allocate the Mesa context */
 211    if (sharedContextPrivate)
 212       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 213    else
 214       shareCtx = NULL;
 215
 216    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 217                                         &functions, (void *) fxMesa);
 218    if (!fxMesa->glCtx) {
 219       FREE(fxMesa);
 220       return GL_FALSE;
 221    }
 222    driContextPriv->driverPrivate = fxMesa;
 223
 224    /* Mirror some important DRI state
 225     */
 226    fxMesa->hHWContext = driContextPriv->hHWContext;
 227    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 228    fxMesa->driFd = sPriv->fd;
 229
 230    fxMesa->driScreen = sPriv;
 231    fxMesa->driContext = driContextPriv;
 232    fxMesa->fxScreen = fxScreen;
 233    fxMesa->sarea = saPriv;
 234
 235    /*JJJ - really?*/
 236    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 237                            ((mesaVis->greenBits == 8) ||
 238                             (mesaVis->depthBits == 0)) );
 239    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 240                              mesaVis->stencilBits &&
 241                              mesaVis->depthBits == 24 );
 242
 243    fxMesa->screen_width = fxScreen->width;
 244    fxMesa->screen_height = fxScreen->height;
 245
 246    fxMesa->new_gl_state = ~0;
 247    fxMesa->new_state = ~0;
 248    fxMesa->dirty = ~0;
 249
 250    /* Parse configuration files */
 251    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 252                         fxMesa->driScreen->myNum, "tdfx");
 253
 254    /* NOTE: This must be here before any Glide calls! */
 255    if (!tdfxInitGlide( fxMesa )) {
 256       FREE(fxMesa);
 257       return GL_FALSE;
 258    }
 259
 260    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 261               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 262               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 263               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 264               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 265               &saPriv->fifoRead );
 266
 267    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 268       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 269    } else {
 270       fxMesa->Glide.SwapInterval = 0;
 271    }
 272    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 273       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 274    } else {
 275       fxMesa->Glide.MaxPendingSwaps = 2;
 276    }
 277
 278    fxMesa->Glide.Initialized = GL_FALSE;
 279    fxMesa->Glide.Board = 0;
 280
 281
 282    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 283       fxMesa->haveTwoTMUs = GL_FALSE;
 284    }
 285    else {
 286       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 287          fxMesa->haveTwoTMUs = GL_FALSE;
 288       } else {
 289          fxMesa->haveTwoTMUs = GL_TRUE;
 290       }
 291    }
 292
 293    fxMesa->stats.swapBuffer = 0;
 294    fxMesa->stats.reqTexUpload = 0;
 295    fxMesa->stats.texUpload = 0;
 296    fxMesa->stats.memTexUpload = 0;
 297
 298    fxMesa->tmuSrc = TDFX_TMU_NONE;
 299
 300    ctx = fxMesa->glCtx;
 301    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 302       ctx->Const.MaxTextureLevels = 12;
 303    } else {
 304       ctx->Const.MaxTextureLevels = 9;
 305    }
 306    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 307    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 308    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 309
 310    /* No wide points.
 311     */
 312    ctx->Const.MinPointSize = 1.0;
 313    ctx->Const.MinPointSizeAA = 1.0;
 314    ctx->Const.MaxPointSize = 1.0;
 315    ctx->Const.MaxPointSizeAA = 1.0;
 316
 317    /* Disable wide lines as we can't antialias them correctly in
 318     * hardware.
 319     */
 320    ctx->Const.MinLineWidth = 1.0;
 321    ctx->Const.MinLineWidthAA = 1.0;
 322    ctx->Const.MaxLineWidth = 1.0;
 323    ctx->Const.MaxLineWidthAA = 1.0;
 324    ctx->Const.LineWidthGranularity = 1.0;
 325
 326    /* Initialize the software rasterizer and helper modules.
 327     */
 328    _swrast_CreateContext( ctx );
 329    _ac_CreateContext( ctx );
 330    _tnl_CreateContext( ctx );
 331    _swsetup_CreateContext( ctx );
 332
 333    /* Install the customized pipeline:
 334     */
 335    _tnl_destroy_pipeline( ctx );
 336    _tnl_install_pipeline( ctx, tdfx_pipeline );
 337
 338    /* Configure swrast and T&L to match hardware characteristics:
 339     */
 340    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 341    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 342    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 343    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 344
 345    tdfxDDInitExtensions( ctx );
 346    /* XXX these should really go right after _mesa_init_driver_functions() */
 347    tdfxDDInitSpanFuncs( ctx );
 348    tdfxDDInitStateFuncs( ctx );
 349    tdfxDDInitTriFuncs( ctx );
 350    tdfxInitVB( ctx );
 351    tdfxInitState( fxMesa );
 352
 353 #if DO_DEBUG
 354    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 355 #endif
 356
 357    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 358       fprintf(stderr, "disabling 3D acceleration\n");
 359       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 360    }
 361
 362    return GL_TRUE;
 363 }
 364
 365
 366 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 367 {
 368    FxI32 result;
 369    int i;
 370
 371    LOCK_HARDWARE( fxMesa );
 372
 373    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 374    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 375       fxMesa->layout[i] = MALLOC( result );
 376       if ( !fxMesa->layout[i] ) {
 377          UNLOCK_HARDWARE( fxMesa );
 378          return GL_FALSE;
 379       }
 380    }
 381
 382    /* Tiny vertex format - 16 bytes.
 383     */
 384    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 385    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 386    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 387    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 388    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 389    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 390
 391    /* Non textured vertex format - 24 bytes (Need w for table fog)
 392     */
 393    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 394    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 395    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 396    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 397    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 398    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 399    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 400
 401    /* Single textured vertex format - 32 bytes.
 402     */
 403    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 404    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 405    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 406    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 407    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 408    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 409    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 410    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 411
 412    /* Multitextured vertex format - 40 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_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 422    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 423
 424    /* Projected texture vertex format - 36 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.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 435
 436    /* Projected multitexture vertex format - 48 bytes.
 437     */
 438    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 439    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 440    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 441    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 442    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 443    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 444    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 445    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 446    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 447    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 448    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 449
 450    UNLOCK_HARDWARE( fxMesa );
 451
 452    return GL_TRUE;
 453 }
 454
 455
 456 /*
 457  * Initialize the state in an tdfxContextPtr struct.
 458  */
 459 static GLboolean
 460 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 461 {
 462    /* KW: Would be nice to make one of these a member of the other.
 463     */
 464    FxI32 result[2];
 465    const char *gext;
 466
 467    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 468       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 469    }
 470
 471 #if DEBUG_LOCKING
 472    fprintf(stderr, "Debug locking enabled\n");
 473 #endif
 474
 475    if ( fxMesa->Glide.Initialized )
 476       return GL_TRUE;
 477
 478    fxMesa->width = driDrawPriv->w;
 479    fxMesa->height = driDrawPriv->h;
 480
 481    /* We have to use a light lock here, because we can't do any glide
 482     * operations yet. No use of FX_* functions in this function.
 483     */
 484    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 485
 486    fxMesa->Glide.grGlideInit();
 487    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 488
 489    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 490                                          GR_RESOLUTION_NONE,
 491                                          GR_REFRESH_NONE,
 492                                          fxMesa->Glide.ColorFormat,
 493                                          fxMesa->Glide.Origin,
 494                                          2, 1 );
 495
 496    fxMesa->Glide.grDRIResetSAREA();
 497
 498    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 499
 500    if ( !fxMesa->Glide.Context )
 501       return GL_FALSE;
 502
 503
 504    /* Perform the Glide-dependant part of the context initialization.
 505     */
 506    FX_grColorMaskv( fxMesa->glCtx, true4 );
 507
 508    tdfxTMInit( fxMesa );
 509
 510    LOCK_HARDWARE( fxMesa );
 511
 512    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 513    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 514    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 515    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 516    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 517    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 518    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 519    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 520    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 521    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 522    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 523
 524    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 525       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 526    } else {
 527       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 528    }
 529
 530    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 531
 532    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 533    fxMesa->Glide.TextureAlign = result[0];
 534
 535    fxMesa->Glide.State = NULL;
 536    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 537    fxMesa->Glide.State = MALLOC( result[0] );
 538
 539    fxMesa->Fog.Table = NULL;
 540    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 541    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 542
 543    UNLOCK_HARDWARE( fxMesa );
 544
 545    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 546       if ( fxMesa->Glide.State )
 547          FREE( fxMesa->Glide.State );
 548       if ( fxMesa->Fog.Table )
 549          FREE( fxMesa->Fog.Table );
 550       return GL_FALSE;
 551    }
 552
 553    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 554       return GL_FALSE;
 555    }
 556
 557    LOCK_HARDWARE( fxMesa );
 558
 559    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 560
 561    if ( getenv( "FX_GLIDE_INFO" ) ) {
 562       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 563       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 564       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 565       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 566       printf( "GR_EXTENSION = %s\n", (char *) gext );
 567    }
 568
 569    UNLOCK_HARDWARE( fxMesa );
 570
 571    fxMesa->numClipRects = 0;
 572    fxMesa->pClipRects = NULL;
 573    fxMesa->scissoredClipRects = GL_FALSE;
 574
 575    fxMesa->Glide.Initialized = GL_TRUE;
 576
 577    return GL_TRUE;
 578 }
 579
 580
 581 void
 582 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 583 {
 584    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 585
 586    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 587       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 588    }
 589
 590    if ( fxMesa ) {
 591       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 592          /* This share group is about to go away, free our private
 593           * texture object data.
 594           */
 595          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 596          GLuint id;
 597          for (id = _mesa_HashFirstEntry(textures);
 598               id;
 599               id = _mesa_HashNextEntry(textures, id)) {
 600             struct gl_texture_object *tObj
 601                = _mesa_lookup_texture(fxMesa->glCtx, id);
 602             tdfxTMFreeTexture(fxMesa, tObj);
 603          }
 604       }
 605
 606       tdfxTMClose(fxMesa);  /* free texture memory */
 607
 608       _swsetup_DestroyContext( fxMesa->glCtx );
 609       _tnl_DestroyContext( fxMesa->glCtx );
 610       _ac_DestroyContext( fxMesa->glCtx );
 611       _swrast_DestroyContext( fxMesa->glCtx );
 612
 613       tdfxFreeVB( fxMesa->glCtx );
 614
 615       /* Free Mesa context */
 616       fxMesa->glCtx->DriverCtx = NULL;
 617       _mesa_destroy_context(fxMesa->glCtx);
 618
 619       /* free the tdfx context */
 620       FREE( fxMesa );
 621    }
 622 }
 623
 624
 625 GLboolean
 626 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 627 {
 628    GET_CURRENT_CONTEXT(ctx);
 629    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 630
 631    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 632       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 633    }
 634
 635    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 636       LOCK_HARDWARE(fxMesa);
 637       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 638       UNLOCK_HARDWARE(fxMesa);
 639    }
 640    return GL_TRUE;
 641 }
 642
 643
 644 GLboolean
 645 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 646                  __DRIdrawablePrivate *driDrawPriv,
 647                  __DRIdrawablePrivate *driReadPriv )
 648 {
 649    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 650       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 651    }
 652
 653    if ( driContextPriv ) {
 654       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 655       GLcontext *newCtx = newFx->glCtx;
 656       GET_CURRENT_CONTEXT(curCtx);
 657
 658       if ( newFx->driDrawable != driDrawPriv ) {
 659          newFx->driDrawable = driDrawPriv;
 660          newFx->dirty = ~0;
 661       }
 662       else {
 663          if (curCtx == newCtx) {
 664             /* same drawable, same context -> no-op */
 665             /* Need to call _mesa_make_current2() in order to make sure API
 666              * dispatch is set correctly.
 667              */
 668             _mesa_make_current( newCtx,
 669                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 670                                 (GLframebuffer *) driReadPriv->driverPrivate );
 671             return GL_TRUE;
 672          }
 673          /* [dBorca] tunnel2 requires this */
 674          newFx->dirty = ~0;
 675       }
 676
 677       if ( !newFx->Glide.Initialized ) {
 678          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 679             return GL_FALSE;
 680
 681          LOCK_HARDWARE( newFx );
 682
 683          /* FIXME: Force loading of window information */
 684          newFx->width = 0;
 685          tdfxUpdateClipping(newCtx);
 686          tdfxUploadClipping(newFx);
 687
 688          UNLOCK_HARDWARE( newFx );
 689       } else {
 690          LOCK_HARDWARE( newFx );
 691
 692          newFx->Glide.grSstSelect( newFx->Glide.Board );
 693          newFx->Glide.grGlideSetState( newFx->Glide.State );
 694
 695          tdfxUpdateClipping(newCtx);
 696          tdfxUploadClipping(newFx);
 697
 698          UNLOCK_HARDWARE( newFx );
 699       }
 700
 701        driUpdateFramebufferSize(newCtx, driDrawPriv);
 702       _mesa_make_current( newCtx,
 703                           (GLframebuffer *) driDrawPriv->driverPrivate,
 704                           (GLframebuffer *) driReadPriv->driverPrivate );
 705    } else {
 706       _mesa_make_current( NULL, NULL, NULL );
 707    }
 708
 709    return GL_TRUE;
 710 }
 711
 712
 713 /*
 714  * Enable this to trace calls to various Glide functions.
 715  */
 716 /*#define DEBUG_TRAP*/
 717 #ifdef DEBUG_TRAP
 718 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 719 static void (*real_grDrawPoint)( const void *a );
 720 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 721 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 722                                        void *pointers, FxU32 stride);
 723 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 724
 725 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 726 static void (*real_grGlideGetVertexLayout)( void *layout );
 727 static void (*real_grGlideSetVertexLayout)( const void *layout );
 728
 729 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 730                                      FxU32             startAddress,
 731                                      GrLOD_t           thisLod,
 732                                      GrLOD_t           largeLod,
 733                                      GrAspectRatio_t   aspectRatio,
 734                                      GrTextureFormat_t format,
 735                                      FxU32             evenOdd,
 736                                               void              *data );
 737
 738
 739 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 740 {
 741    printf("%s\n", __FUNCTION__);
 742    (*real_grDrawTriangle)(a, b, c);
 743 }
 744
 745 static void debug_grDrawPoint( const void *a )
 746 {
 747    const float *f = (const float *) a;
 748    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 749    (*real_grDrawPoint)(a);
 750 }
 751
 752 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 753 {
 754    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 755    (*real_grDrawVertexArray)(mode, Count, pointers);
 756 }
 757
 758 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 759                                        void *pointers, FxU32 stride)
 760 {
 761    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 762    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 763 }
 764
 765 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 766 {
 767    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 768           (int) minx, (int) miny, (int) maxx, (int) maxy);
 769    (*real_grClipWindow)(minx, miny, maxx, maxy);
 770 }
 771
 772 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 773 {
 774    (*real_grVertexLayout)(param, offset, mode);
 775 }
 776
 777 static void debug_grGlideGetVertexLayout( void *layout )
 778 {
 779    (*real_grGlideGetVertexLayout)(layout);
 780 }
 781
 782 static void debug_grGlideSetVertexLayout( const void *layout )
 783 {
 784    (*real_grGlideSetVertexLayout)(layout);
 785 }
 786
 787 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 788                                      FxU32             startAddress,
 789                                      GrLOD_t           thisLod,
 790                                      GrLOD_t           largeLod,
 791                                      GrAspectRatio_t   aspectRatio,
 792                                      GrTextureFormat_t format,
 793                                      FxU32             evenOdd,
 794                                      void              *data )
 795 {
 796    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 797                                     aspectRatio, format, evenOdd, data);
 798 }
 799
 800 #endif
 801
 802
 803 /*
 804  * Examine the context's deviceID to determine what kind of 3dfx hardware
 805  * is installed.  dlopen() the appropriate Glide library and initialize
 806  * this context's Glide function pointers.
 807  * Return:  true/false = success/failure
 808  */
 809 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 810 {
 811    static const char *defaultGlide = "libglide3.so";
 812    const char *libName;
 813    void *libHandle;
 814
 815    /*
 816     * XXX this code which selects a Glide library filename given the
 817     * deviceID may need to be cleaned up a bit.
 818     * Non-Linux systems may have different filenames, for example.
 819     */
 820    switch (tmesa->fxScreen->deviceID) {
 821    case PCI_CHIP_BANSHEE:
 822    case PCI_CHIP_VOODOO3:
 823       libName = "libglide3-v3.so";
 824       break;
 825    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 826       libName = "libglide3-v5.so";
 827       break;
 828    default:
 829       {
 830          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 831                  tmesa->fxScreen->deviceID);
 832       }
 833       return GL_FALSE;
 834    }
 835
 836    libHandle = dlopen(libName, RTLD_NOW);
 837    if (!libHandle) {
 838       /* The device-specific Glide library filename didn't work, try the
 839        * old, generic libglide3.so library.
 840        */
 841       libHandle = dlopen(defaultGlide, RTLD_NOW);
 842       if (!libHandle) {
 843          __driUtilMessage(
 844             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 845             libName, defaultGlide);
 846          __driUtilMessage("dlerror() message: %s", dlerror());
 847          return GL_FALSE;
 848       }
 849       libName = defaultGlide;
 850    }
 851
 852    {
 853       const char *env = getenv("LIBGL_DEBUG");
 854       if (env && strstr(env, "verbose")) {
 855          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 856       }
 857    }
 858
 859 #define GET_FUNCTION(PTR, NAME)                                         \
 860    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 861    if (!tmesa->Glide.PTR) {                                             \
 862       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 863               NAME, libName);                                           \
 864    }
 865
 866    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 867    GET_FUNCTION(grDrawLine, "grDrawLine");
 868    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 869    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 870    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 871    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 872    GET_FUNCTION(grBufferClear, "grBufferClear");
 873    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 874    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 875    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 876    GET_FUNCTION(grFinish, "grFinish");
 877    GET_FUNCTION(grFlush, "grFlush");
 878    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 879    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 880 #if 0
 881    /* Not in V3 lib, and not used anyway. */
 882    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 883 #endif
 884    GET_FUNCTION(grSelectContext, "grSelectContext");
 885    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 886    GET_FUNCTION(grSstSelect, "grSstSelect");
 887    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 888    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 889    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 890    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 891    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 892    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 893    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 894    GET_FUNCTION(grClipWindow, "grClipWindow");
 895    GET_FUNCTION(grColorCombine, "grColorCombine");
 896    GET_FUNCTION(grColorMask, "grColorMask");
 897    GET_FUNCTION(grCullMode, "grCullMode");
 898    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 899    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 900    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 901    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 902    GET_FUNCTION(grDepthMask, "grDepthMask");
 903    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 904    GET_FUNCTION(grDitherMode, "grDitherMode");
 905    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 906    GET_FUNCTION(grFogMode, "grFogMode");
 907    GET_FUNCTION(grFogTable, "grFogTable");
 908    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 909    GET_FUNCTION(grSplash, "grSplash");
 910    GET_FUNCTION(grGet, "grGet");
 911    GET_FUNCTION(grGetString, "grGetString");
 912    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 913    GET_FUNCTION(grReset, "grReset");
 914    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 915    GET_FUNCTION(grEnable, "grEnable");
 916    GET_FUNCTION(grDisable, "grDisable");
 917    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 918    GET_FUNCTION(grDepthRange, "grDepthRange");
 919    GET_FUNCTION(grStippleMode, "grStippleMode");
 920    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 921    GET_FUNCTION(grViewport, "grViewport");
 922    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 923    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 924    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 925    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 926    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 927    GET_FUNCTION(grTexSource, "grTexSource");
 928    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 929    GET_FUNCTION(grTexCombine, "grTexCombine");
 930    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 931    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 932    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 933    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 934    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 935    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 936    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 937    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 938    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 939    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 940    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 941    GET_FUNCTION(grLfbLock, "grLfbLock");
 942    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 943    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 944    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 945    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 946    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 947    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 948    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 949    GET_FUNCTION(grGlideInit, "grGlideInit");
 950    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 951    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 952    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 953    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 954    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 955
 956    /* Glide utility functions */
 957    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 958    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 959    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 960
 961    /* DRI functions */
 962    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 963    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 964    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 965    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 966    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 967    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 968    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 969
 970    /*
 971     * Extension functions:
 972     * Just use dlysm() because we want a NULL pointer if the function is
 973     * not found.
 974     */
 975    /* PIXEXT extension */
 976    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 977    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 978    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 979    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 980    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 981    /* COMBINE extension */
 982    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 983    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 984    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 985    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 986    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 987    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 988    /* Texus 2 */
 989    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 990    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 991    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 992
 993 #ifdef DEBUG_TRAP
 994    /* wrap the drawing functions so we can trap them */
 995    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 996    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 997
 998    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 999    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
1000
1001    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
1002    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
1003
1004    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
1005    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
1006
1007    real_grClipWindow = tmesa->Glide.grClipWindow;
1008    tmesa->Glide.grClipWindow = debug_grClipWindow;
1009
1010    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1011    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1012
1013    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1014    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1015
1016    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1017    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1018
1019    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1020    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1021
1022 #endif
1023    return GL_TRUE;
1024 }