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_buffer_object
  64 /* #define need_GL_ARB_vertex_program */
  65 #define need_GL_EXT_blend_equation_separate
  66 #define need_GL_EXT_blend_func_separate
  67 #define need_GL_EXT_blend_minmax
  68 #define need_GL_EXT_fog_coord
  69 #define need_GL_EXT_multi_draw_arrays
  70 #define need_GL_EXT_paletted_texture
  71 /* #define need_GL_EXT_secondary_color */
  72 #define need_GL_IBM_multimode_draw_arrays
  73 /* #define need_GL_MESA_program_debug */
  74 /* #define need_GL_NV_vertex_program */
  75 #include "extension_helper.h"
  76
  77
  78 /**
  79  * Common extension strings exported by all cards
  80  */
  81 const struct dri_extension card_extensions[] =
  82 {
  83     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
  84     { "GL_ARB_texture_mirrored_repeat",    NULL },
  85     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
  86
  87     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
  88     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
  89     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
  90     { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
  91     { "GL_EXT_shared_texture_palette",     NULL },
  92     { "GL_EXT_stencil_wrap",               NULL },
  93     { "GL_EXT_texture_env_add",            NULL },
  94     { "GL_EXT_texture_lod_bias",           NULL },
  95     { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },
  96
  97 #ifdef need_GL_ARB_point_parameters
  98     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
  99     { "GL_ARB_point_sprite",               NULL },
 100 #endif
 101 #ifdef need_GL_EXT_secondary_color
 102     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 103 #endif
 104 #ifdef need_GL_ARB_vertex_program
 105     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 106 #endif
 107 #ifdef need_GL_NV_vertex_program
 108     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 109     { "GL_NV_vertex_program1_1",           NULL },
 110 #endif
 111 #ifdef need_GL_MESA_program_debug
 112     { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
 113 #endif
 114     { NULL,                                NULL }
 115 };
 116
 117 /**
 118  * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 119  */
 120 const struct dri_extension napalm_extensions[] =
 121 {
 122     { "GL_ARB_texture_env_combine",        NULL },
 123     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 124     { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
 125     { "GL_EXT_texture_compression_s3tc",   NULL },
 126     { "GL_EXT_texture_env_combine",        NULL },
 127
 128     { "GL_3DFX_texture_compression_FXT1",  NULL },
 129     { "GL_NV_blend_square",                NULL },
 130     { "GL_S3_s3tc",                        NULL },
 131     { NULL,                                NULL }
 132 };
 133
 134 /*
 135  * Enable/Disable the extensions for this context.
 136  */
 137 static void tdfxDDInitExtensions( GLcontext *ctx )
 138 {
 139    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 140
 141    driInitExtensions( ctx, card_extensions, GL_FALSE );
 142
 143    if ( fxMesa->haveTwoTMUs ) {
 144       _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
 145    }
 146
 147    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 148       driInitExtensions( ctx, napalm_extensions, GL_FALSE );
 149    } else {
 150       _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
 151    }
 152 }
 153
 154
 155
 156 static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
 157    &_tnl_vertex_transform_stage,
 158    &_tnl_normal_transform_stage,
 159    &_tnl_lighting_stage,
 160    &_tnl_fog_coordinate_stage,
 161    &_tnl_texgen_stage,
 162    &_tnl_texture_transform_stage,
 163    &_tnl_point_attenuation_stage,
 164    &_tnl_render_stage,
 165    0,
 166 };
 167
 168 static const struct dri_debug_control debug_control[] =
 169 {
 170     { "dri",   DEBUG_VERBOSE_DRI },
 171     { "sync",  DEBUG_ALWAYS_SYNC },
 172     { "api",   DEBUG_VERBOSE_API },
 173     { "fall",  DEBUG_VERBOSE_FALL },
 174     { NULL,    0 }
 175 };
 176
 177 GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
 178                              __DRIcontextPrivate *driContextPriv,
 179                              void *sharedContextPrivate )
 180 {
 181    tdfxContextPtr fxMesa;
 182    GLcontext *ctx, *shareCtx;
 183    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 184    tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
 185    TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
 186                                               sizeof(drm_sarea_t));
 187    struct dd_function_table functions;
 188
 189    /* Allocate tdfx context */
 190    fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
 191    if (!fxMesa)
 192       return GL_FALSE;
 193
 194    /* Init default driver functions then plug in our tdfx-specific functions
 195     * (the texture functions are especially important)
 196     */
 197    _mesa_init_driver_functions(&functions);
 198    tdfxDDInitDriverFuncs(mesaVis, &functions);
 199    tdfxInitTextureFuncs(&functions);
 200    tdfxInitRenderFuncs(&functions);
 201
 202    /* Allocate the Mesa context */
 203    if (sharedContextPrivate)
 204       shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
 205    else
 206       shareCtx = NULL;
 207
 208    fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
 209                                         &functions, (void *) fxMesa);
 210    if (!fxMesa->glCtx) {
 211       FREE(fxMesa);
 212       return GL_FALSE;
 213    }
 214    driContextPriv->driverPrivate = fxMesa;
 215
 216    /* Mirror some important DRI state
 217     */
 218    fxMesa->hHWContext = driContextPriv->hHWContext;
 219    fxMesa->driHwLock = &sPriv->pSAREA->lock;
 220    fxMesa->driFd = sPriv->fd;
 221
 222    fxMesa->driScreen = sPriv;
 223    fxMesa->driContext = driContextPriv;
 224    fxMesa->fxScreen = fxScreen;
 225    fxMesa->sarea = saPriv;
 226
 227    /*JJJ - really?*/
 228    fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
 229                            ((mesaVis->greenBits == 8) ||
 230                             (mesaVis->depthBits == 0)) );
 231    fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
 232                              mesaVis->stencilBits &&
 233                              mesaVis->depthBits == 24 );
 234
 235    fxMesa->screen_width = fxScreen->width;
 236    fxMesa->screen_height = fxScreen->height;
 237
 238    fxMesa->new_gl_state = ~0;
 239    fxMesa->new_state = ~0;
 240    fxMesa->dirty = ~0;
 241
 242    /* Parse configuration files */
 243    driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
 244                         fxMesa->driScreen->myNum, "tdfx");
 245
 246    /* NOTE: This must be here before any Glide calls! */
 247    if (!tdfxInitGlide( fxMesa )) {
 248       FREE(fxMesa);
 249       return GL_FALSE;
 250    }
 251
 252    fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
 253               fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
 254               fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
 255               fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
 256               fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
 257               &saPriv->fifoRead );
 258
 259    if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
 260       fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
 261    } else {
 262       fxMesa->Glide.SwapInterval = 0;
 263    }
 264    if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
 265       fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
 266    } else {
 267       fxMesa->Glide.MaxPendingSwaps = 2;
 268    }
 269
 270    fxMesa->Glide.Initialized = GL_FALSE;
 271    fxMesa->Glide.Board = 0;
 272
 273
 274    if (getenv("FX_EMULATE_SINGLE_TMU")) {
 275       fxMesa->haveTwoTMUs = GL_FALSE;
 276    }
 277    else {
 278       if ( TDFX_IS_BANSHEE( fxMesa ) ) {
 279          fxMesa->haveTwoTMUs = GL_FALSE;
 280       } else {
 281          fxMesa->haveTwoTMUs = GL_TRUE;
 282       }
 283    }
 284
 285    fxMesa->stats.swapBuffer = 0;
 286    fxMesa->stats.reqTexUpload = 0;
 287    fxMesa->stats.texUpload = 0;
 288    fxMesa->stats.memTexUpload = 0;
 289
 290    fxMesa->tmuSrc = TDFX_TMU_NONE;
 291
 292    ctx = fxMesa->glCtx;
 293    if ( TDFX_IS_NAPALM( fxMesa ) ) {
 294       ctx->Const.MaxTextureLevels = 12;
 295    } else {
 296       ctx->Const.MaxTextureLevels = 9;
 297    }
 298    ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
 299    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 300    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 301
 302    /* No wide points.
 303     */
 304    ctx->Const.MinPointSize = 1.0;
 305    ctx->Const.MinPointSizeAA = 1.0;
 306    ctx->Const.MaxPointSize = 1.0;
 307    ctx->Const.MaxPointSizeAA = 1.0;
 308
 309    /* Disable wide lines as we can't antialias them correctly in
 310     * hardware.
 311     */
 312    ctx->Const.MinLineWidth = 1.0;
 313    ctx->Const.MinLineWidthAA = 1.0;
 314    ctx->Const.MaxLineWidth = 1.0;
 315    ctx->Const.MaxLineWidthAA = 1.0;
 316    ctx->Const.LineWidthGranularity = 1.0;
 317
 318    /* Initialize the software rasterizer and helper modules.
 319     */
 320    _swrast_CreateContext( ctx );
 321    _vbo_CreateContext( ctx );
 322    _tnl_CreateContext( ctx );
 323    _swsetup_CreateContext( ctx );
 324
 325    /* Install the customized pipeline:
 326     */
 327    _tnl_destroy_pipeline( ctx );
 328    _tnl_install_pipeline( ctx, tdfx_pipeline );
 329
 330    /* Configure swrast and T&L to match hardware characteristics:
 331     */
 332    _swrast_allow_pixel_fog( ctx, GL_TRUE );
 333    _swrast_allow_vertex_fog( ctx, GL_FALSE );
 334    _tnl_allow_pixel_fog( ctx, GL_TRUE );
 335    _tnl_allow_vertex_fog( ctx, GL_FALSE );
 336
 337    tdfxDDInitExtensions( ctx );
 338    /* XXX these should really go right after _mesa_init_driver_functions() */
 339    tdfxDDInitSpanFuncs( ctx );
 340    tdfxDDInitStateFuncs( ctx );
 341    tdfxDDInitTriFuncs( ctx );
 342    tdfxInitVB( ctx );
 343    tdfxInitState( fxMesa );
 344
 345 #if DO_DEBUG
 346    TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
 347 #endif
 348
 349    if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
 350       fprintf(stderr, "disabling 3D acceleration\n");
 351       FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
 352    }
 353
 354    return GL_TRUE;
 355 }
 356
 357
 358 static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
 359 {
 360    FxI32 result;
 361    int i;
 362
 363    LOCK_HARDWARE( fxMesa );
 364
 365    fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
 366    for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
 367       fxMesa->layout[i] = MALLOC( result );
 368       if ( !fxMesa->layout[i] ) {
 369          UNLOCK_HARDWARE( fxMesa );
 370          return GL_FALSE;
 371       }
 372    }
 373
 374    /* Tiny vertex format - 16 bytes.
 375     */
 376    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 377    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 378    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 379    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 380    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 381    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );
 382
 383    /* Non textured vertex format - 24 bytes (Need w for table fog)
 384     */
 385    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 386    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 387    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 388    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 389    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 390    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 391    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );
 392
 393    /* Single textured vertex format - 32 bytes.
 394     */
 395    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 396    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 397    fxMesa->Glide.grVertexLayout( GR_PARAM_XY,   TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 398    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 399    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 400    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 401    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 402    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );
 403
 404    /* Multitextured vertex format - 40 bytes.
 405     */
 406    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 407    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 408    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 409    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 410    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 411    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 412    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 413    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 414    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );
 415
 416    /* Projected texture vertex format - 36 bytes.
 417     */
 418    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 419    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 420    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 421    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 422    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 423    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 424    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 425    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 426    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );
 427
 428    /* Projected multitexture vertex format - 48 bytes.
 429     */
 430    fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
 431    fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
 432    fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
 433    fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
 434    fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
 435    fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
 436    fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
 437    fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
 438    fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
 439    fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
 440    fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );
 441
 442    UNLOCK_HARDWARE( fxMesa );
 443
 444    return GL_TRUE;
 445 }
 446
 447
 448 /*
 449  * Initialize the state in an tdfxContextPtr struct.
 450  */
 451 static GLboolean
 452 tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
 453 {
 454    /* KW: Would be nice to make one of these a member of the other.
 455     */
 456    FxI32 result[2];
 457    const char *gext;
 458
 459    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 460       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 461    }
 462
 463 #if DEBUG_LOCKING
 464    fprintf(stderr, "Debug locking enabled\n");
 465 #endif
 466
 467    if ( fxMesa->Glide.Initialized )
 468       return GL_TRUE;
 469
 470    fxMesa->width = driDrawPriv->w;
 471    fxMesa->height = driDrawPriv->h;
 472
 473    /* We have to use a light lock here, because we can't do any glide
 474     * operations yet. No use of FX_* functions in this function.
 475     */
 476    DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 477
 478    fxMesa->Glide.grGlideInit();
 479    fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
 480
 481    fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
 482                                          GR_RESOLUTION_NONE,
 483                                          GR_REFRESH_NONE,
 484                                          fxMesa->Glide.ColorFormat,
 485                                          fxMesa->Glide.Origin,
 486                                          2, 1 );
 487
 488    fxMesa->Glide.grDRIResetSAREA();
 489
 490    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );
 491
 492    if ( !fxMesa->Glide.Context )
 493       return GL_FALSE;
 494
 495
 496    /* Perform the Glide-dependant part of the context initialization.
 497     */
 498    FX_grColorMaskv( fxMesa->glCtx, true4 );
 499
 500    tdfxTMInit( fxMesa );
 501
 502    LOCK_HARDWARE( fxMesa );
 503
 504    /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
 505    gext = fxMesa->Glide.grGetString( GR_EXTENSION );
 506    fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
 507    fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
 508    fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
 509    fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
 510    fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
 511    fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
 512    fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
 513    fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
 514    fxMesa->Glide.HaveTexus2 = GL_FALSE;
 515
 516    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
 517       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
 518    } else {
 519       fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
 520    }
 521
 522    fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );
 523
 524    fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
 525    fxMesa->Glide.TextureAlign = result[0];
 526
 527    fxMesa->Glide.State = NULL;
 528    fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
 529    fxMesa->Glide.State = MALLOC( result[0] );
 530
 531    fxMesa->Fog.Table = NULL;
 532    fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
 533    fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );
 534
 535    UNLOCK_HARDWARE( fxMesa );
 536
 537    if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
 538       if ( fxMesa->Glide.State )
 539          FREE( fxMesa->Glide.State );
 540       if ( fxMesa->Fog.Table )
 541          FREE( fxMesa->Fog.Table );
 542       return GL_FALSE;
 543    }
 544
 545    if ( !tdfxInitVertexFormats( fxMesa ) ) {
 546       return GL_FALSE;
 547    }
 548
 549    LOCK_HARDWARE( fxMesa );
 550
 551    fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );
 552
 553    if ( getenv( "FX_GLIDE_INFO" ) ) {
 554       printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
 555       printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
 556       printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
 557       printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
 558       printf( "GR_EXTENSION = %s\n", (char *) gext );
 559    }
 560
 561    UNLOCK_HARDWARE( fxMesa );
 562
 563    fxMesa->numClipRects = 0;
 564    fxMesa->pClipRects = NULL;
 565    fxMesa->scissoredClipRects = GL_FALSE;
 566
 567    fxMesa->Glide.Initialized = GL_TRUE;
 568
 569    return GL_TRUE;
 570 }
 571
 572
 573 void
 574 tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
 575 {
 576    tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;
 577
 578    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 579       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
 580    }
 581
 582    if ( fxMesa ) {
 583       if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
 584          /* This share group is about to go away, free our private
 585           * texture object data.
 586           */
 587          struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
 588          GLuint id;
 589          for (id = _mesa_HashFirstEntry(textures);
 590               id;
 591               id = _mesa_HashNextEntry(textures, id)) {
 592             struct gl_texture_object *tObj
 593                = _mesa_lookup_texture(fxMesa->glCtx, id);
 594             tdfxTMFreeTexture(fxMesa, tObj);
 595          }
 596       }
 597
 598       tdfxTMClose(fxMesa);  /* free texture memory */
 599
 600       _swsetup_DestroyContext( fxMesa->glCtx );
 601       _tnl_DestroyContext( fxMesa->glCtx );
 602       _vbo_DestroyContext( fxMesa->glCtx );
 603       _swrast_DestroyContext( fxMesa->glCtx );
 604
 605       tdfxFreeVB( fxMesa->glCtx );
 606
 607       /* Free Mesa context */
 608       fxMesa->glCtx->DriverCtx = NULL;
 609       _mesa_destroy_context(fxMesa->glCtx);
 610
 611       /* free the tdfx context */
 612       FREE( fxMesa );
 613    }
 614 }
 615
 616
 617 GLboolean
 618 tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
 619 {
 620    GET_CURRENT_CONTEXT(ctx);
 621    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 622
 623    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 624       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 625    }
 626
 627    if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
 628       LOCK_HARDWARE(fxMesa);
 629       fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
 630       UNLOCK_HARDWARE(fxMesa);
 631    }
 632    return GL_TRUE;
 633 }
 634
 635
 636 GLboolean
 637 tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
 638                  __DRIdrawablePrivate *driDrawPriv,
 639                  __DRIdrawablePrivate *driReadPriv )
 640 {
 641    if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
 642       fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
 643    }
 644
 645    if ( driContextPriv ) {
 646       tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
 647       GLcontext *newCtx = newFx->glCtx;
 648       GET_CURRENT_CONTEXT(curCtx);
 649
 650       if ((newFx->driDrawable != driDrawPriv)
 651           || (newFx->driReadable != driReadPriv)) {
 652          newFx->driDrawable = driDrawPriv;
 653          newFx->driReadable = driReadPriv;
 654          newFx->dirty = ~0;
 655       }
 656       else {
 657          if (curCtx == newCtx) {
 658             /* same drawable, same context -> no-op */
 659             /* Need to call _mesa_make_current2() in order to make sure API
 660              * dispatch is set correctly.
 661              */
 662             _mesa_make_current( newCtx,
 663                                 (GLframebuffer *) driDrawPriv->driverPrivate,
 664                                 (GLframebuffer *) driReadPriv->driverPrivate );
 665             return GL_TRUE;
 666          }
 667          /* [dBorca] tunnel2 requires this */
 668          newFx->dirty = ~0;
 669       }
 670
 671       driUpdateFramebufferSize(newCtx, driDrawPriv);
 672       if (driDrawPriv != driReadPriv) {
 673          driUpdateFramebufferSize(newCtx, driReadPriv);
 674       }
 675
 676       if ( !newFx->Glide.Initialized ) {
 677          if ( !tdfxInitContext( driDrawPriv, newFx ) )
 678             return GL_FALSE;
 679
 680          LOCK_HARDWARE( newFx );
 681
 682          /* FIXME: Force loading of window information */
 683          newFx->width = 0;
 684          tdfxUpdateClipping(newCtx);
 685          tdfxUploadClipping(newFx);
 686
 687          UNLOCK_HARDWARE( newFx );
 688       } else {
 689          LOCK_HARDWARE( newFx );
 690
 691          newFx->Glide.grSstSelect( newFx->Glide.Board );
 692          newFx->Glide.grGlideSetState( newFx->Glide.State );
 693
 694          tdfxUpdateClipping(newCtx);
 695          tdfxUploadClipping(newFx);
 696
 697          UNLOCK_HARDWARE( newFx );
 698       }
 699
 700       _mesa_make_current( newCtx,
 701                           (GLframebuffer *) driDrawPriv->driverPrivate,
 702                           (GLframebuffer *) driReadPriv->driverPrivate );
 703    } else {
 704       _mesa_make_current( NULL, NULL, NULL );
 705    }
 706
 707    return GL_TRUE;
 708 }
 709
 710
 711 /*
 712  * Enable this to trace calls to various Glide functions.
 713  */
 714 /*#define DEBUG_TRAP*/
 715 #ifdef DEBUG_TRAP
 716 static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
 717 static void (*real_grDrawPoint)( const void *a );
 718 static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
 719 static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
 720                                        void *pointers, FxU32 stride);
 721 static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );
 722
 723 static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
 724 static void (*real_grGlideGetVertexLayout)( void *layout );
 725 static void (*real_grGlideSetVertexLayout)( const void *layout );
 726
 727 static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
 728                                      FxU32             startAddress,
 729                                      GrLOD_t           thisLod,
 730                                      GrLOD_t           largeLod,
 731                                      GrAspectRatio_t   aspectRatio,
 732                                      GrTextureFormat_t format,
 733                                      FxU32             evenOdd,
 734                                               void              *data );
 735
 736
 737 static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
 738 {
 739    printf("%s\n", __FUNCTION__);
 740    (*real_grDrawTriangle)(a, b, c);
 741 }
 742
 743 static void debug_grDrawPoint( const void *a )
 744 {
 745    const float *f = (const float *) a;
 746    printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
 747    (*real_grDrawPoint)(a);
 748 }
 749
 750 static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
 751 {
 752    printf("%s count=%d\n", __FUNCTION__, (int) Count);
 753    (*real_grDrawVertexArray)(mode, Count, pointers);
 754 }
 755
 756 static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
 757                                        void *pointers, FxU32 stride)
 758 {
 759    printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
 760    (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
 761 }
 762
 763 static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
 764 {
 765    printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
 766           (int) minx, (int) miny, (int) maxx, (int) maxy);
 767    (*real_grClipWindow)(minx, miny, maxx, maxy);
 768 }
 769
 770 static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
 771 {
 772    (*real_grVertexLayout)(param, offset, mode);
 773 }
 774
 775 static void debug_grGlideGetVertexLayout( void *layout )
 776 {
 777    (*real_grGlideGetVertexLayout)(layout);
 778 }
 779
 780 static void debug_grGlideSetVertexLayout( const void *layout )
 781 {
 782    (*real_grGlideSetVertexLayout)(layout);
 783 }
 784
 785 static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
 786                                      FxU32             startAddress,
 787                                      GrLOD_t           thisLod,
 788                                      GrLOD_t           largeLod,
 789                                      GrAspectRatio_t   aspectRatio,
 790                                      GrTextureFormat_t format,
 791                                      FxU32             evenOdd,
 792                                      void              *data )
 793 {
 794    (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
 795                                     aspectRatio, format, evenOdd, data);
 796 }
 797
 798 #endif
 799
 800
 801 /*
 802  * Examine the context's deviceID to determine what kind of 3dfx hardware
 803  * is installed.  dlopen() the appropriate Glide library and initialize
 804  * this context's Glide function pointers.
 805  * Return:  true/false = success/failure
 806  */
 807 GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
 808 {
 809    static const char *defaultGlide = "libglide3.so";
 810    const char *libName;
 811    void *libHandle;
 812
 813    /*
 814     * XXX this code which selects a Glide library filename given the
 815     * deviceID may need to be cleaned up a bit.
 816     * Non-Linux systems may have different filenames, for example.
 817     */
 818    switch (tmesa->fxScreen->deviceID) {
 819    case PCI_CHIP_BANSHEE:
 820    case PCI_CHIP_VOODOO3:
 821       libName = "libglide3-v3.so";
 822       break;
 823    case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
 824       libName = "libglide3-v5.so";
 825       break;
 826    default:
 827       {
 828          __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
 829                  tmesa->fxScreen->deviceID);
 830       }
 831       return GL_FALSE;
 832    }
 833
 834    libHandle = dlopen(libName, RTLD_NOW);
 835    if (!libHandle) {
 836       /* The device-specific Glide library filename didn't work, try the
 837        * old, generic libglide3.so library.
 838        */
 839       libHandle = dlopen(defaultGlide, RTLD_NOW);
 840       if (!libHandle) {
 841          __driUtilMessage(
 842             "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
 843             libName, defaultGlide);
 844          __driUtilMessage("dlerror() message: %s", dlerror());
 845          return GL_FALSE;
 846       }
 847       libName = defaultGlide;
 848    }
 849
 850    {
 851       const char *env = getenv("LIBGL_DEBUG");
 852       if (env && strstr(env, "verbose")) {
 853          fprintf(stderr, "libGL: using Glide library %s\n", libName);
 854       }
 855    }
 856
 857 #define GET_FUNCTION(PTR, NAME)                                         \
 858    tmesa->Glide.PTR = dlsym(libHandle, NAME);                           \
 859    if (!tmesa->Glide.PTR) {                                             \
 860       __driUtilMessage("couldn't find Glide function %s in %s.",        \
 861               NAME, libName);                                           \
 862    }
 863
 864    GET_FUNCTION(grDrawPoint, "grDrawPoint");
 865    GET_FUNCTION(grDrawLine, "grDrawLine");
 866    GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
 867    GET_FUNCTION(grVertexLayout, "grVertexLayout");
 868    GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
 869    GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
 870    GET_FUNCTION(grBufferClear, "grBufferClear");
 871    /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
 872    GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
 873    GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
 874    GET_FUNCTION(grFinish, "grFinish");
 875    GET_FUNCTION(grFlush, "grFlush");
 876    GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
 877    GET_FUNCTION(grSstWinClose, "grSstWinClose");
 878 #if 0
 879    /* Not in V3 lib, and not used anyway. */
 880    GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
 881 #endif
 882    GET_FUNCTION(grSelectContext, "grSelectContext");
 883    GET_FUNCTION(grSstOrigin, "grSstOrigin");
 884    GET_FUNCTION(grSstSelect, "grSstSelect");
 885    GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
 886    GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
 887    GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
 888    GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
 889    GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
 890    GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
 891    GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
 892    GET_FUNCTION(grClipWindow, "grClipWindow");
 893    GET_FUNCTION(grColorCombine, "grColorCombine");
 894    GET_FUNCTION(grColorMask, "grColorMask");
 895    GET_FUNCTION(grCullMode, "grCullMode");
 896    GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
 897    GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
 898    GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
 899    GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
 900    GET_FUNCTION(grDepthMask, "grDepthMask");
 901    GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
 902    GET_FUNCTION(grDitherMode, "grDitherMode");
 903    GET_FUNCTION(grFogColorValue, "grFogColorValue");
 904    GET_FUNCTION(grFogMode, "grFogMode");
 905    GET_FUNCTION(grFogTable, "grFogTable");
 906    GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
 907    GET_FUNCTION(grSplash, "grSplash");
 908    GET_FUNCTION(grGet, "grGet");
 909    GET_FUNCTION(grGetString, "grGetString");
 910    GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
 911    GET_FUNCTION(grReset, "grReset");
 912    GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
 913    GET_FUNCTION(grEnable, "grEnable");
 914    GET_FUNCTION(grDisable, "grDisable");
 915    GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
 916    GET_FUNCTION(grDepthRange, "grDepthRange");
 917    GET_FUNCTION(grStippleMode, "grStippleMode");
 918    GET_FUNCTION(grStipplePattern, "grStipplePattern");
 919    GET_FUNCTION(grViewport, "grViewport");
 920    GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
 921    GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
 922    GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
 923    GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
 924    GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
 925    GET_FUNCTION(grTexSource, "grTexSource");
 926    GET_FUNCTION(grTexClampMode, "grTexClampMode");
 927    GET_FUNCTION(grTexCombine, "grTexCombine");
 928    GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
 929    GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
 930    GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
 931    GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
 932    GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
 933    GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
 934    GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
 935    GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
 936    GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
 937    GET_FUNCTION(grTexMultibase, "grTexMultibase");
 938    GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
 939    GET_FUNCTION(grLfbLock, "grLfbLock");
 940    GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
 941    GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
 942    GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
 943    GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
 944    GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
 945    GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
 946    GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
 947    GET_FUNCTION(grGlideInit, "grGlideInit");
 948    GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
 949    GET_FUNCTION(grGlideGetState, "grGlideGetState");
 950    GET_FUNCTION(grGlideSetState, "grGlideSetState");
 951    GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
 952    GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");
 953
 954    /* Glide utility functions */
 955    GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
 956    GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
 957    GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");
 958
 959    /* DRI functions */
 960    GET_FUNCTION(grDRIOpen, "grDRIOpen");
 961    GET_FUNCTION(grDRIPosition, "grDRIPosition");
 962    /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
 963    GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
 964    GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
 965    GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
 966    GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");
 967
 968    /*
 969     * Extension functions:
 970     * Just use dlysm() because we want a NULL pointer if the function is
 971     * not found.
 972     */
 973    /* PIXEXT extension */
 974    tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
 975    tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
 976    tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
 977    tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
 978    tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
 979    /* COMBINE extension */
 980    tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
 981    tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
 982    tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
 983    tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
 984    tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
 985    tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
 986    /* Texus 2 */
 987    tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
 988    tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
 989    tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
 990
 991 #ifdef DEBUG_TRAP
 992    /* wrap the drawing functions so we can trap them */
 993    real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
 994    tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;
 995
 996    real_grDrawPoint = tmesa->Glide.grDrawPoint;
 997    tmesa->Glide.grDrawPoint = debug_grDrawPoint;
 998
 999    real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
1000    tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;
1001
1002    real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
1003    tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;
1004
1005    real_grClipWindow = tmesa->Glide.grClipWindow;
1006    tmesa->Glide.grClipWindow = debug_grClipWindow;
1007
1008    real_grVertexLayout = tmesa->Glide.grVertexLayout;
1009    tmesa->Glide.grVertexLayout = debug_grVertexLayout;
1010
1011    real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
1012    tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;
1013
1014    real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
1015    tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;
1016
1017    real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
1018    tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;
1019
1020 #endif
1021    return GL_TRUE;
1022 }