src/mesa/drivers/dri/r200/r200_context.c

   1 /*
   2 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   3
   4 The Weather Channel (TM) funded Tungsten Graphics to develop the
   5 initial release of the Radeon 8500 driver under the XFree86 license.
   6 This notice must be preserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining
   9 a copy of this software and associated documentation files (the
  10 "Software"), to deal in the Software without restriction, including
  11 without limitation the rights to use, copy, modify, merge, publish,
  12 distribute, sublicense, and/or sell copies of the Software, and to
  13 permit persons to whom the Software is furnished to do so, subject to
  14 the following conditions:
  15
  16 The above copyright notice and this permission notice (including the
  17 next paragraph) shall be included in all copies or substantial
  18 portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 **************************************************************************/
  29
  30 /*
  31  * Authors:
  32  *   Keith Whitwell <keith@tungstengraphics.com>
  33  */
  34
  35 #include "main/glheader.h"
  36 #include "main/api_arrayelt.h"
  37 #include "main/context.h"
  38 #include "main/simple_list.h"
  39 #include "main/imports.h"
  40 #include "main/matrix.h"
  41 #include "main/extensions.h"
  42 #include "main/framebuffer.h"
  43 #include "main/state.h"
  44
  45 #include "swrast/swrast.h"
  46 #include "swrast_setup/swrast_setup.h"
  47 #include "vbo/vbo.h"
  48
  49 #include "tnl/tnl.h"
  50 #include "tnl/t_pipeline.h"
  51
  52 #include "drivers/common/driverfuncs.h"
  53
  54 #include "r200_context.h"
  55 #include "r200_ioctl.h"
  56 #include "r200_state.h"
  57 #include "r200_pixel.h"
  58 #include "r200_tex.h"
  59 #include "r200_swtcl.h"
  60 #include "r200_tcl.h"
  61 #include "r200_maos.h"
  62 #include "r200_vertprog.h"
  63
  64 #include "radeon_span.h"
  65
  66 #define need_GL_ARB_vertex_program
  67 #define need_GL_ATI_fragment_shader
  68 #define need_GL_EXT_blend_minmax
  69 #define need_GL_EXT_fog_coord
  70 #define need_GL_EXT_secondary_color
  71 #define need_GL_EXT_blend_equation_separate
  72 #define need_GL_EXT_blend_func_separate
  73 #define need_GL_NV_vertex_program
  74 #define need_GL_ARB_point_parameters
  75 #include "extension_helper.h"
  76
  77 #define DRIVER_DATE     "20060602"
  78
  79 #include "vblank.h"
  80 #include "utils.h"
  81 #include "xmlpool.h" /* for symbolic values of enum-type options */
  82
  83 /* Return various strings for glGetString().
  84  */
  85 static const GLubyte *r200GetString( GLcontext *ctx, GLenum name )
  86 {
  87    r200ContextPtr rmesa = R200_CONTEXT(ctx);
  88    static char buffer[128];
  89    unsigned   offset;
  90    GLuint agp_mode = (rmesa->radeon.radeonScreen->card_type == RADEON_CARD_PCI)? 0 :
  91       rmesa->radeon.radeonScreen->AGPMode;
  92
  93    switch ( name ) {
  94    case GL_VENDOR:
  95       return (GLubyte *)"Tungsten Graphics, Inc.";
  96
  97    case GL_RENDERER:
  98       offset = driGetRendererString( buffer, "R200", DRIVER_DATE,
  99                                      agp_mode );
 100
 101       sprintf( & buffer[ offset ], " %sTCL",
 102                !(rmesa->radeon.TclFallback & R200_TCL_FALLBACK_TCL_DISABLE)
 103                ? "" : "NO-" );
 104
 105       return (GLubyte *)buffer;
 106
 107    default:
 108       return NULL;
 109    }
 110 }
 111
 112
 113 /* Extension strings exported by the R200 driver.
 114  */
 115 const struct dri_extension card_extensions[] =
 116 {
 117     { "GL_ARB_multitexture",               NULL },
 118     { "GL_ARB_texture_border_clamp",       NULL },
 119     { "GL_ARB_texture_env_add",            NULL },
 120     { "GL_ARB_texture_env_combine",        NULL },
 121     { "GL_ARB_texture_env_dot3",           NULL },
 122     { "GL_ARB_texture_env_crossbar",       NULL },
 123     { "GL_ARB_texture_mirrored_repeat",    NULL },
 124     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 125     { "GL_EXT_blend_subtract",             NULL },
 126     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 127     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 128     { "GL_EXT_stencil_wrap",               NULL },
 129     { "GL_EXT_texture_edge_clamp",         NULL },
 130     { "GL_EXT_texture_env_combine",        NULL },
 131     { "GL_EXT_texture_env_dot3",           NULL },
 132     { "GL_EXT_texture_filter_anisotropic", NULL },
 133     { "GL_EXT_texture_lod_bias",           NULL },
 134     { "GL_EXT_texture_mirror_clamp",       NULL },
 135     { "GL_EXT_texture_rectangle",          NULL },
 136     { "GL_ATI_texture_env_combine3",       NULL },
 137     { "GL_ATI_texture_mirror_once",        NULL },
 138     { "GL_MESA_pack_invert",               NULL },
 139     { "GL_NV_blend_square",                NULL },
 140     { "GL_SGIS_generate_mipmap",           NULL },
 141     { NULL,                                NULL }
 142 };
 143
 144 const struct dri_extension blend_extensions[] = {
 145     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 146     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 147     { NULL,                                NULL }
 148 };
 149
 150 const struct dri_extension ARB_vp_extension[] = {
 151     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
 152 };
 153
 154 const struct dri_extension NV_vp_extension[] = {
 155     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
 156 };
 157
 158 const struct dri_extension ATI_fs_extension[] = {
 159     { "GL_ATI_fragment_shader",            GL_ATI_fragment_shader_functions }
 160 };
 161
 162 const struct dri_extension point_extensions[] = {
 163     { "GL_ARB_point_sprite",               NULL },
 164     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 165     { NULL,                                NULL }
 166 };
 167
 168 extern const struct tnl_pipeline_stage _r200_render_stage;
 169 extern const struct tnl_pipeline_stage _r200_tcl_stage;
 170
 171 static const struct tnl_pipeline_stage *r200_pipeline[] = {
 172
 173    /* Try and go straight to t&l
 174     */
 175    &_r200_tcl_stage,
 176
 177    /* Catch any t&l fallbacks
 178     */
 179    &_tnl_vertex_transform_stage,
 180    &_tnl_normal_transform_stage,
 181    &_tnl_lighting_stage,
 182    &_tnl_fog_coordinate_stage,
 183    &_tnl_texgen_stage,
 184    &_tnl_texture_transform_stage,
 185    &_tnl_point_attenuation_stage,
 186    &_tnl_vertex_program_stage,
 187    /* Try again to go to tcl?
 188     *     - no good for asymmetric-twoside (do with multipass)
 189     *     - no good for asymmetric-unfilled (do with multipass)
 190     *     - good for material
 191     *     - good for texgen
 192     *     - need to manipulate a bit of state
 193     *
 194     * - worth it/not worth it?
 195     */
 196
 197    /* Else do them here.
 198     */
 199 /*    &_r200_render_stage,  */ /* FIXME: bugs with ut2003 */
 200    &_tnl_render_stage,          /* FALLBACK:  */
 201    NULL,
 202 };
 203
 204
 205
 206 /* Initialize the driver's misc functions.
 207  */
 208 static void r200InitDriverFuncs( struct dd_function_table *functions )
 209 {
 210     functions->GetBufferSize            = NULL; /* OBSOLETE */
 211     functions->GetString                = r200GetString;
 212 }
 213
 214 static const struct dri_debug_control debug_control[] =
 215 {
 216     { "fall",  DEBUG_FALLBACKS },
 217     { "tex",   DEBUG_TEXTURE },
 218     { "ioctl", DEBUG_IOCTL },
 219     { "prim",  DEBUG_PRIMS },
 220     { "vert",  DEBUG_VERTS },
 221     { "state", DEBUG_STATE },
 222     { "code",  DEBUG_CODEGEN },
 223     { "vfmt",  DEBUG_VFMT },
 224     { "vtxf",  DEBUG_VFMT },
 225     { "verb",  DEBUG_VERBOSE },
 226     { "dri",   DEBUG_DRI },
 227     { "dma",   DEBUG_DMA },
 228     { "san",   DEBUG_SANITY },
 229     { "sync",  DEBUG_SYNC },
 230     { "pix",   DEBUG_PIXEL },
 231     { "mem",   DEBUG_MEMORY },
 232     { NULL,    0 }
 233 };
 234
 235 static void r200_get_lock(radeonContextPtr radeon)
 236 {
 237    r200ContextPtr rmesa = (r200ContextPtr)radeon;
 238    drm_radeon_sarea_t *sarea = radeon->sarea;
 239    int i;
 240
 241    R200_STATECHANGE( rmesa, ctx );
 242    if (rmesa->radeon.sarea->tiling_enabled) {
 243       rmesa->hw.ctx.cmd[CTX_RB3D_COLORPITCH] |= R200_COLOR_TILE_ENABLE;
 244    }
 245    else rmesa->hw.ctx.cmd[CTX_RB3D_COLORPITCH] &= ~R200_COLOR_TILE_ENABLE;
 246
 247    if ( sarea->ctx_owner != rmesa->radeon.dri.hwContext ) {
 248       sarea->ctx_owner = rmesa->radeon.dri.hwContext;
 249       if (!radeon->radeonScreen->kernel_mm)
 250          radeon_bo_legacy_texture_age(radeon->radeonScreen->bom);
 251    }
 252
 253 }
 254
 255 static void r200_vtbl_emit_cs_header(struct radeon_cs *cs, radeonContextPtr rmesa)
 256 {
 257 }
 258
 259
 260 static void r200_init_vtbl(radeonContextPtr radeon)
 261 {
 262    radeon->vtbl.get_lock = r200_get_lock;
 263    radeon->vtbl.update_viewport_offset = r200UpdateViewportOffset;
 264    radeon->vtbl.emit_cs_header = r200_vtbl_emit_cs_header;
 265    radeon->vtbl.swtcl_flush = r200_swtcl_flush;
 266    radeon->vtbl.fallback = r200Fallback;
 267 }
 268
 269
 270 /* Create the device specific rendering context.
 271  */
 272 GLboolean r200CreateContext( const __GLcontextModes *glVisual,
 273                              __DRIcontextPrivate *driContextPriv,
 274                              void *sharedContextPrivate)
 275 {
 276    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 277    radeonScreenPtr screen = (radeonScreenPtr)(sPriv->private);
 278    struct dd_function_table functions;
 279    r200ContextPtr rmesa;
 280    GLcontext *ctx;
 281    int i;
 282    int tcl_mode;
 283
 284    assert(glVisual);
 285    assert(driContextPriv);
 286    assert(screen);
 287
 288    /* Allocate the R200 context */
 289    rmesa = (r200ContextPtr) CALLOC( sizeof(*rmesa) );
 290    if ( !rmesa )
 291       return GL_FALSE;
 292
 293    r200_init_vtbl(&rmesa->radeon);
 294    /* init exp fog table data */
 295    r200InitStaticFogData();
 296
 297    /* Parse configuration files.
 298     * Do this here so that initialMaxAnisotropy is set before we create
 299     * the default textures.
 300     */
 301    driParseConfigFiles (&rmesa->radeon.optionCache, &screen->optionCache,
 302                         screen->driScreen->myNum, "r200");
 303    rmesa->radeon.initialMaxAnisotropy = driQueryOptionf(&rmesa->radeon.optionCache,
 304                                                         "def_max_anisotropy");
 305
 306    if ( driQueryOptionb( &rmesa->radeon.optionCache, "hyperz" ) ) {
 307       if ( sPriv->drm_version.minor < 13 )
 308          fprintf( stderr, "DRM version 1.%d too old to support HyperZ, "
 309                           "disabling.\n", sPriv->drm_version.minor );
 310       else
 311          rmesa->using_hyperz = GL_TRUE;
 312    }
 313
 314    if ( sPriv->drm_version.minor >= 15 )
 315       rmesa->texmicrotile = GL_TRUE;
 316
 317    /* Init default driver functions then plug in our R200-specific functions
 318     * (the texture functions are especially important)
 319     */
 320    _mesa_init_driver_functions(&functions);
 321    r200InitDriverFuncs(&functions);
 322    r200InitIoctlFuncs(&functions);
 323    r200InitStateFuncs(&functions);
 324    r200InitTextureFuncs(&functions);
 325    r200InitShaderFuncs(&functions);
 326
 327    if (!radeonInitContext(&rmesa->radeon, &functions,
 328                           glVisual, driContextPriv,
 329                           sharedContextPrivate)) {
 330      FREE(rmesa);
 331      return GL_FALSE;
 332    }
 333
 334    rmesa->radeon.texture_depth = driQueryOptioni (&rmesa->radeon.optionCache,
 335                                            "texture_depth");
 336    if (rmesa->radeon.texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 337       rmesa->radeon.texture_depth = ( screen->cpp == 4 ) ?
 338          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 339
 340    rmesa->radeon.swtcl.RenderIndex = ~0;
 341    rmesa->radeon.hw.all_dirty = 1;
 342
 343    /* Set the maximum texture size small enough that we can guarentee that
 344     * all texture units can bind a maximal texture and have all of them in
 345     * texturable memory at once. Depending on the allow_large_textures driconf
 346     * setting allow larger textures.
 347     */
 348
 349    ctx = rmesa->radeon.glCtx;
 350    ctx->Const.MaxTextureUnits = driQueryOptioni (&rmesa->radeon.optionCache,
 351                                                  "texture_units");
 352    ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
 353    ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;
 354
 355    i = driQueryOptioni( &rmesa->radeon.optionCache, "allow_large_textures");
 356
 357    ctx->Const.MaxTextureMaxAnisotropy = 16.0;
 358
 359    /* No wide AA points.
 360     */
 361    ctx->Const.MinPointSize = 1.0;
 362    ctx->Const.MinPointSizeAA = 1.0;
 363    ctx->Const.MaxPointSizeAA = 1.0;
 364    ctx->Const.PointSizeGranularity = 0.0625;
 365    if (rmesa->radeon.radeonScreen->drmSupportsPointSprites)
 366       ctx->Const.MaxPointSize = 2047.0;
 367    else
 368       ctx->Const.MaxPointSize = 1.0;
 369
 370    /* mesa initialization problem - _mesa_init_point was already called */
 371    ctx->Point.MaxSize = ctx->Const.MaxPointSize;
 372
 373    ctx->Const.MinLineWidth = 1.0;
 374    ctx->Const.MinLineWidthAA = 1.0;
 375    ctx->Const.MaxLineWidth = 10.0;
 376    ctx->Const.MaxLineWidthAA = 10.0;
 377    ctx->Const.LineWidthGranularity = 0.0625;
 378
 379    ctx->Const.VertexProgram.MaxNativeInstructions = R200_VSF_MAX_INST;
 380    ctx->Const.VertexProgram.MaxNativeAttribs = 12;
 381    ctx->Const.VertexProgram.MaxNativeTemps = R200_VSF_MAX_TEMPS;
 382    ctx->Const.VertexProgram.MaxNativeParameters = R200_VSF_MAX_PARAM;
 383    ctx->Const.VertexProgram.MaxNativeAddressRegs = 1;
 384
 385    ctx->Const.MaxDrawBuffers = 1;
 386
 387    /* Initialize the software rasterizer and helper modules.
 388     */
 389    _swrast_CreateContext( ctx );
 390    _vbo_CreateContext( ctx );
 391    _tnl_CreateContext( ctx );
 392    _swsetup_CreateContext( ctx );
 393    _ae_create_context( ctx );
 394
 395    /* Install the customized pipeline:
 396     */
 397    _tnl_destroy_pipeline( ctx );
 398    _tnl_install_pipeline( ctx, r200_pipeline );
 399
 400    /* Try and keep materials and vertices separate:
 401     */
 402 /*    _tnl_isolate_materials( ctx, GL_TRUE ); */
 403
 404
 405    /* Configure swrast and TNL to match hardware characteristics:
 406     */
 407    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 408    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 409    _tnl_allow_pixel_fog( ctx, GL_FALSE );
 410    _tnl_allow_vertex_fog( ctx, GL_TRUE );
 411
 412
 413    for ( i = 0 ; i < R200_MAX_TEXTURE_UNITS ; i++ ) {
 414       _math_matrix_ctr( &rmesa->TexGenMatrix[i] );
 415       _math_matrix_set_identity( &rmesa->TexGenMatrix[i] );
 416    }
 417    _math_matrix_ctr( &rmesa->tmpmat );
 418    _math_matrix_set_identity( &rmesa->tmpmat );
 419
 420    driInitExtensions( ctx, card_extensions, GL_TRUE );
 421    if (!(rmesa->radeon.radeonScreen->chip_flags & R200_CHIPSET_YCBCR_BROKEN)) {
 422      /* yuv textures don't work with some chips - R200 / rv280 okay so far
 423         others get the bit ordering right but don't actually do YUV-RGB conversion */
 424       _mesa_enable_extension( ctx, "GL_MESA_ycbcr_texture" );
 425    }
 426    if (rmesa->radeon.glCtx->Mesa_DXTn) {
 427       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 428       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 429    }
 430    else if (driQueryOptionb (&rmesa->radeon.optionCache, "force_s3tc_enable")) {
 431       _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 432    }
 433
 434    if (rmesa->radeon.radeonScreen->drmSupportsCubeMapsR200)
 435       _mesa_enable_extension( ctx, "GL_ARB_texture_cube_map" );
 436    if (rmesa->radeon.radeonScreen->drmSupportsBlendColor) {
 437        driInitExtensions( ctx, blend_extensions, GL_FALSE );
 438    }
 439    if(rmesa->radeon.radeonScreen->drmSupportsVertexProgram)
 440       driInitSingleExtension( ctx, ARB_vp_extension );
 441    if(driQueryOptionb(&rmesa->radeon.optionCache, "nv_vertex_program"))
 442       driInitSingleExtension( ctx, NV_vp_extension );
 443
 444    if ((ctx->Const.MaxTextureUnits == 6) && rmesa->radeon.radeonScreen->drmSupportsFragShader)
 445       driInitSingleExtension( ctx, ATI_fs_extension );
 446    if (rmesa->radeon.radeonScreen->drmSupportsPointSprites)
 447       driInitExtensions( ctx, point_extensions, GL_FALSE );
 448 #if 0
 449    r200InitDriverFuncs( ctx );
 450    r200InitIoctlFuncs( ctx );
 451    r200InitStateFuncs( ctx );
 452    r200InitTextureFuncs( ctx );
 453 #endif
 454    /* plug in a few more device driver functions */
 455    /* XXX these should really go right after _mesa_init_driver_functions() */
 456    radeonInitSpanFuncs( ctx );
 457    r200InitPixelFuncs( ctx );
 458    r200InitTnlFuncs( ctx );
 459    r200InitState( rmesa );
 460    r200InitSwtcl( ctx );
 461
 462    rmesa->prefer_gart_client_texturing =
 463       (getenv("R200_GART_CLIENT_TEXTURES") != 0);
 464
 465 #if DO_DEBUG
 466    R200_DEBUG  = driParseDebugString( getenv( "R200_DEBUG" ),
 467                                       debug_control );
 468    R200_DEBUG |= driParseDebugString( getenv( "RADEON_DEBUG" ),
 469                                       debug_control );
 470 #endif
 471
 472    tcl_mode = driQueryOptioni(&rmesa->radeon.optionCache, "tcl_mode");
 473    if (driQueryOptionb(&rmesa->radeon.optionCache, "no_rast")) {
 474       fprintf(stderr, "disabling 3D acceleration\n");
 475       FALLBACK(rmesa, R200_FALLBACK_DISABLE, 1);
 476    }
 477    else if (tcl_mode == DRI_CONF_TCL_SW || getenv("R200_NO_TCL") ||
 478             !(rmesa->radeon.radeonScreen->chip_flags & RADEON_CHIPSET_TCL)) {
 479       if (rmesa->radeon.radeonScreen->chip_flags & RADEON_CHIPSET_TCL) {
 480          rmesa->radeon.radeonScreen->chip_flags &= ~RADEON_CHIPSET_TCL;
 481          fprintf(stderr, "Disabling HW TCL support\n");
 482       }
 483       TCL_FALLBACK(rmesa->radeon.glCtx, R200_TCL_FALLBACK_TCL_DISABLE, 1);
 484    }
 485
 486    return GL_TRUE;
 487 }
 488
 489
 490 /* Destroy the device specific context.
 491  */
 492 /* Destroy the Mesa and driver specific context data.
 493  */
 494 void r200DestroyContext( __DRIcontextPrivate *driContextPriv )
 495 {
 496    GET_CURRENT_CONTEXT(ctx);
 497    r200ContextPtr rmesa = (r200ContextPtr) driContextPriv->driverPrivate;
 498    r200ContextPtr current = ctx ? R200_CONTEXT(ctx) : NULL;
 499
 500    /* check if we're deleting the currently bound context */
 501    if (rmesa == current) {
 502       radeon_firevertices(&rmesa->radeon);
 503       _mesa_make_current(NULL, NULL, NULL);
 504    }
 505
 506    /* Free r200 context resources */
 507    assert(rmesa); /* should never be null */
 508    if ( rmesa ) {
 509
 510       _swsetup_DestroyContext( rmesa->radeon.glCtx );
 511       _tnl_DestroyContext( rmesa->radeon.glCtx );
 512       _vbo_DestroyContext( rmesa->radeon.glCtx );
 513       _swrast_DestroyContext( rmesa->radeon.glCtx );
 514
 515       r200DestroySwtcl( rmesa->radeon.glCtx );
 516       r200ReleaseArrays( rmesa->radeon.glCtx, ~0 );
 517
 518       if (rmesa->radeon.dma.current) {
 519          radeonReleaseDmaRegion( &rmesa->radeon );
 520          rcommonFlushCmdBuf( &rmesa->radeon, __FUNCTION__ );
 521       }
 522
 523       if (rmesa->radeon.state.scissor.pClipRects) {
 524          FREE(rmesa->radeon.state.scissor.pClipRects);
 525          rmesa->radeon.state.scissor.pClipRects = NULL;
 526       }
 527
 528       radeonCleanupContext(&rmesa->radeon);
 529
 530       FREE( rmesa );
 531    }
 532 }
 533
 534
 535
 536 /* Force the context `c' to be unbound from its buffer.
 537  */
 538 GLboolean
 539 r200UnbindContext( __DRIcontextPrivate *driContextPriv )
 540 {
 541    r200ContextPtr rmesa = (r200ContextPtr) driContextPriv->driverPrivate;
 542
 543    if (R200_DEBUG & DEBUG_DRI)
 544       fprintf(stderr, "%s ctx %p\n", __FUNCTION__, (void *)rmesa->radeon.glCtx);
 545
 546    return GL_TRUE;
 547 }