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_multisample
  62 /* #define need_GL_ARB_point_parameters */
  63 #define need_GL_ARB_occlusion_query
  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_occlusion_query",            GL_ARB_occlusion_query_functions },
  86     { "GL_ARB_texture_mirrored_repeat",    NULL },
  87     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
  88
  89     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  90     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  91     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
  92     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  93     { "GL_EXT_shared_texture_palette",     NULL },
  94     { "GL_EXT_stencil_wrap",               NULL },
  95     { "GL_EXT_texture_env_add",            NULL },
  96     { "GL_EXT_texture_lod_bias",           NULL },
  97     { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },
  98
  99 #ifdef need_GL_ARB_point_parameters
 100     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 101     { "GL_ARB_point_sprite",               NULL },
 102 #endif
 103 #ifdef need_GL_EXT_secondary_color
 104     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 105 #endif
 106 #ifdef need_GL_ARB_vertex_program
 107     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 108 #endif
 109 #ifdef need_GL_NV_vertex_program
 110     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 111     { "GL_NV_vertex_program1_1",           NULL },
 112 #endif
 113 #ifdef need_GL_MESA_program_debug
 114     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 115 #endif
 116     { NULL,                                NULL }
 117 };
 118
 119 /**
 120  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 121  */
 122 const struct dri_extension napalm_extensions[] =
 123 {
 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    &_tnl_render_stage,
 167    0,
 168 };
 169
 170 static const struct dri_debug_control debug_control[] =
 171 {
 172     { "dri",   DEBUG_VERBOSE_DRI },
 173     { "sync",  DEBUG_ALWAYS_SYNC },
 174     { "api",   DEBUG_VERBOSE_API },
 175     { "fall",  DEBUG_VERBOSE_FALL },
 176     { NULL,    0 }
 177 };
 178
 179 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 180                              __DRIcontextPrivate *driContextPriv,
 181                              void *sharedContextPrivate )
 182 {
 183    tdfxContextPtr fxMesa;
 184    GLcontext *ctx, *shareCtx;
 185    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 186    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 187    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 188                                               sizeof(drm_sarea_t));
 189    struct dd_function_table functions;
 190
 191    /* Allocate tdfx context */
 192    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 193    if (!fxMesa)
 194       return GL_FALSE;
 195
 196    /* Init default driver functions then plug in our tdfx-specific functions
 197     * (the texture functions are especially important)
 198     */
 199    _mesa_init_driver_functions(&functions);
 200    tdfxDDInitDriverFuncs(mesaVis, &functions);
 201    tdfxInitTextureFuncs(&functions);
 202    tdfxInitRenderFuncs(&functions);
 203
 204    /* Allocate the Mesa context */
 205    if (sharedContextPrivate)
 206       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 207    else
 208       shareCtx = NULL;
 209
 210    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 211                                         &functions, (void *) fxMesa);
 212    if (!fxMesa->glCtx) {
 213       FREE(fxMesa);
 214       return GL_FALSE;
 215    }
 216    driContextPriv->driverPrivate = fxMesa;
 217
 218    /* Mirror some important DRI state
 219     */
 220    fxMesa->hHWContext = driContextPriv->hHWContext;
 221    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 222    fxMesa->driFd = sPriv->fd;
 223
 224    fxMesa->driScreen = sPriv;
 225    fxMesa->driContext = driContextPriv;
 226    fxMesa->fxScreen = fxScreen;
 227    fxMesa->sarea = saPriv;
 228
 229    /*JJJ - really?*/
 230    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 231                            ((mesaVis->greenBits == 8) ||
 232                             (mesaVis->depthBits == 0)) );
 233    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 234                              mesaVis->stencilBits &&
 235                              mesaVis->depthBits == 24 );
 236
 237    fxMesa->screen_width = fxScreen->width;
 238    fxMesa->screen_height = fxScreen->height;
 239
 240    fxMesa->new_gl_state = ~0;
 241    fxMesa->new_state = ~0;
 242    fxMesa->dirty = ~0;
 243
 244    /* Parse configuration files */
 245    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 246                         fxMesa->driScreen->myNum, "tdfx");
 247
 248    /* NOTE: This must be here before any Glide calls! */
 249    if (!tdfxInitGlide( fxMesa )) {
 250       FREE(fxMesa);
 251       return GL_FALSE;
 252    }
 253
 254    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 255               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 256               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 257               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 258               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 259               &saPriv->fifoRead );
 260
 261    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 262       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 263    } else {
 264       fxMesa->Glide.SwapInterval = 0;
 265    }
 266    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 267       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 268    } else {
 269       fxMesa->Glide.MaxPendingSwaps = 2;
 270    }
 271
 272    fxMesa->Glide.Initialized = GL_FALSE;
 273    fxMesa->Glide.Board = 0;
 274
 275
 276    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 277       fxMesa->haveTwoTMUs = GL_FALSE;
 278    }
 279    else {
 280       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 281          fxMesa->haveTwoTMUs = GL_FALSE;
 282       } else {
 283          fxMesa->haveTwoTMUs = GL_TRUE;
 284       }
 285    }
 286
 287    fxMesa->stats.swapBuffer = 0;
 288    fxMesa->stats.reqTexUpload = 0;
 289    fxMesa->stats.texUpload = 0;
 290    fxMesa->stats.memTexUpload = 0;
 291
 292    fxMesa->tmuSrc = TDFX_TMU_NONE;
 293
 294    ctx = fxMesa->glCtx;
 295    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 296       ctx->Const.MaxTextureLevels = 12;
 297    } else {
 298       ctx->Const.MaxTextureLevels = 9;
 299    }
 300    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 301    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 302    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 303
 304    /* No wide points.
 305     */
 306    ctx->Const.MinPointSize = 1.0;
 307    ctx->Const.MinPointSizeAA = 1.0;
 308    ctx->Const.MaxPointSize = 1.0;
 309    ctx->Const.MaxPointSizeAA = 1.0;
 310
 311    /* Disable wide lines as we can't antialias them correctly in
 312     * hardware.
 313     */
 314    ctx->Const.MinLineWidth = 1.0;
 315    ctx->Const.MinLineWidthAA = 1.0;
 316    ctx->Const.MaxLineWidth = 1.0;
 317    ctx->Const.MaxLineWidthAA = 1.0;
 318    ctx->Const.LineWidthGranularity = 1.0;
 319
 320    /* Initialize the software rasterizer and helper modules.
 321     */
 322    _swrast_CreateContext( ctx );
 323    _vbo_CreateContext( ctx );
 324    _tnl_CreateContext( ctx );
 325    _swsetup_CreateContext( ctx );
 326
 327    /* Install the customized pipeline:
 328     */
 329    _tnl_destroy_pipeline( ctx );
 330    _tnl_install_pipeline( ctx, tdfx_pipeline );
 331
 332    /* Configure swrast and T&L to match hardware characteristics:
 333     */
 334    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 335    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 336    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 337    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 338
 339    tdfxDDInitExtensions( ctx );
 340    /* XXX these should really go right after _mesa_init_driver_functions() */
 341    tdfxDDInitSpanFuncs( ctx );
 342    tdfxDDInitStateFuncs( ctx );
 343    tdfxDDInitTriFuncs( ctx );
 344    tdfxInitVB( ctx );
 345    tdfxInitState( fxMesa );
 346
 347 #if DO_DEBUG
 348    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 349 #endif
 350
 351    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 352       fprintf(stderr, "disabling 3D acceleration\n");
 353       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 354    }
 355
 356    return GL_TRUE;
 357 }
 358
 359
 360 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 361 {
 362    FxI32 result;
 363    int i;
 364
 365    LOCK_HARDWARE( fxMesa );
 366
 367    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 368    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 369       fxMesa->layout[i] = MALLOC( result );
 370       if ( !fxMesa->layout[i] ) {
 371          UNLOCK_HARDWARE( fxMesa );
 372          return GL_FALSE;
 373       }
 374    }
 375
 376    /* Tiny vertex format - 16 bytes.
 377     */
 378    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 379    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 380    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 381    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_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_TINY] );
 384
 385    /* Non textured vertex format - 24 bytes (Need w for table fog)
 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.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 394
 395    /* Single textured vertex format - 32 bytes.
 396     */
 397    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 398    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 399    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 403    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 404    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 405
 406    /* Multitextured vertex format - 40 bytes.
 407     */
 408    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 409    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 410    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 411    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 412    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 413    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 414    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 415    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 416    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 417
 418    /* Projected texture vertex format - 36 bytes.
 419     */
 420    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 421    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 422    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 423    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 424    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 425    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 426    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 427    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 428    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 429
 430    /* Projected multitexture vertex format - 48 bytes.
 431     */
 432    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 433    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 434    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 435    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 436    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 437    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 438    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 439    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 440    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 441    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 442    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 443
 444    UNLOCK_HARDWARE( fxMesa );
 445
 446    return GL_TRUE;
 447 }
 448
 449
 450 /*
 451  * Initialize the state in an tdfxContextPtr struct.
 452  */
 453 static GLboolean
 454 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 455 {
 456    /* KW: Would be nice to make one of these a member of the other.
 457     */
 458    FxI32 result[2];
 459    const char *gext;
 460
 461    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 462       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 463    }
 464
 465 #if DEBUG_LOCKING
 466    fprintf(stderr, "Debug locking enabled\n");
 467 #endif
 468
 469    if ( fxMesa->Glide.Initialized )
 470       return GL_TRUE;
 471
 472    fxMesa->width = driDrawPriv->w;
 473    fxMesa->height = driDrawPriv->h;
 474
 475    /* We have to use a light lock here, because we can't do any glide
 476     * operations yet. No use of FX_* functions in this function.
 477     */
 478    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 479
 480    fxMesa->Glide.grGlideInit();
 481    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 482
 483    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 484                                          GR_RESOLUTION_NONE,
 485                                          GR_REFRESH_NONE,
 486                                          fxMesa->Glide.ColorFormat,
 487                                          fxMesa->Glide.Origin,
 488                                          2, 1 );
 489
 490    fxMesa->Glide.grDRIResetSAREA();
 491
 492    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 493
 494    if ( !fxMesa->Glide.Context )
 495       return GL_FALSE;
 496
 497
 498    /* Perform the Glide-dependant part of the context initialization.
 499     */
 500    FX_grColorMaskv( fxMesa->glCtx, true4 );
 501
 502    tdfxTMInit( fxMesa );
 503
 504    LOCK_HARDWARE( fxMesa );
 505
 506    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 507    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 508    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 509    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 510    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 511    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 512    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 513    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 514    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 515    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 516    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 517
 518    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 519       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 520    } else {
 521       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 522    }
 523
 524    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 525
 526    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 527    fxMesa->Glide.TextureAlign = result[0];
 528
 529    fxMesa->Glide.State = NULL;
 530    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 531    fxMesa->Glide.State = MALLOC( result[0] );
 532
 533    fxMesa->Fog.Table = NULL;
 534    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 535    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 536
 537    UNLOCK_HARDWARE( fxMesa );
 538
 539    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 540       if ( fxMesa->Glide.State )
 541          FREE( fxMesa->Glide.State );
 542       if ( fxMesa->Fog.Table )
 543          FREE( fxMesa->Fog.Table );
 544       return GL_FALSE;
 545    }
 546
 547    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 548       return GL_FALSE;
 549    }
 550
 551    LOCK_HARDWARE( fxMesa );
 552
 553    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 554
 555    if ( getenv( "FX_GLIDE_INFO" ) ) {
 556       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 557       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 558       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 559       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 560       printf( "GR_EXTENSION = %s\n", (char *) gext );
 561    }
 562
 563    UNLOCK_HARDWARE( fxMesa );
 564
 565    fxMesa->numClipRects = 0;
 566    fxMesa->pClipRects = NULL;
 567    fxMesa->scissoredClipRects = GL_FALSE;
 568
 569    fxMesa->Glide.Initialized = GL_TRUE;
 570
 571    return GL_TRUE;
 572 }
 573
 574
 575 void
 576 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 577 {
 578    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 579
 580    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 581       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 582    }
 583
 584    if ( fxMesa ) {
 585       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 586          /* This share group is about to go away, free our private
 587           * texture object data.
 588           */
 589          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 590          GLuint id;
 591          for (id = _mesa_HashFirstEntry(textures);
 592               id;
 593               id = _mesa_HashNextEntry(textures, id)) {
 594             struct gl_texture_object *tObj
 595                = _mesa_lookup_texture(fxMesa->glCtx, id);
 596             tdfxTMFreeTexture(fxMesa, tObj);
 597          }
 598       }
 599
 600       tdfxTMClose(fxMesa);  /* free texture memory */
 601
 602       _swsetup_DestroyContext( fxMesa->glCtx );
 603       _tnl_DestroyContext( fxMesa->glCtx );
 604       _vbo_DestroyContext( fxMesa->glCtx );
 605       _swrast_DestroyContext( fxMesa->glCtx );
 606
 607       tdfxFreeVB( fxMesa->glCtx );
 608
 609       /* Free Mesa context */
 610       fxMesa->glCtx->DriverCtx = NULL;
 611       _mesa_destroy_context(fxMesa->glCtx);
 612
 613       /* free the tdfx context */
 614       FREE( fxMesa );
 615    }
 616 }
 617
 618
 619 GLboolean
 620 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 621 {
 622    GET_CURRENT_CONTEXT(ctx);
 623    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 624
 625    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 626       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 627    }
 628
 629    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 630       LOCK_HARDWARE(fxMesa);
 631       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 632       UNLOCK_HARDWARE(fxMesa);
 633    }
 634    return GL_TRUE;
 635 }
 636
 637
 638 GLboolean
 639 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 640                  __DRIdrawablePrivate *driDrawPriv,
 641                  __DRIdrawablePrivate *driReadPriv )
 642 {
 643    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 644       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 645    }
 646
 647    if ( driContextPriv ) {
 648       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 649       GLcontext *newCtx = newFx->glCtx;
 650       GET_CURRENT_CONTEXT(curCtx);
 651
 652       if ((newFx->driDrawable != driDrawPriv)
 653           || (newFx->driReadable != driReadPriv)) {
 654          newFx->driDrawable = driDrawPriv;
 655          newFx->driReadable = driReadPriv;
 656          newFx->dirty = ~0;
 657       }
 658       else {
 659          if (curCtx == newCtx) {
 660             /* same drawable, same context -> no-op */
 661             /* Need to call _mesa_make_current2() in order to make sure API
 662              * dispatch is set correctly.
 663              */
 664             _mesa_make_current( newCtx,
 665                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 666                                 (GLframebuffer *) driReadPriv->driverPrivate );
 667             return GL_TRUE;
 668          }
 669          /* [dBorca] tunnel2 requires this */
 670          newFx->dirty = ~0;
 671       }
 672
 673       driUpdateFramebufferSize(newCtx, driDrawPriv);
 674       if (driDrawPriv != driReadPriv) {
 675          driUpdateFramebufferSize(newCtx, driReadPriv);
 676       }
 677
 678       if ( !newFx->Glide.Initialized ) {
 679          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 680             return GL_FALSE;
 681
 682          LOCK_HARDWARE( newFx );
 683
 684          /* FIXME: Force loading of window information */
 685          newFx->width = 0;
 686          tdfxUpdateClipping(newCtx);
 687          tdfxUploadClipping(newFx);
 688
 689          UNLOCK_HARDWARE( newFx );
 690       } else {
 691          LOCK_HARDWARE( newFx );
 692
 693          newFx->Glide.grSstSelect( newFx->Glide.Board );
 694          newFx->Glide.grGlideSetState( newFx->Glide.State );
 695
 696          tdfxUpdateClipping(newCtx);
 697          tdfxUploadClipping(newFx);
 698
 699          UNLOCK_HARDWARE( newFx );
 700       }
 701
 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 }