src/mesa/drivers/dri/mga/mga_xmesa.c

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mga_xmesa.c,v 1.19 2003/03/26 20:43:49 tsi Exp $ */
   2 /*
   3  * Copyright 2000-2001 VA Linux Systems, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * on the rights to use, copy, modify, merge, publish, distribute, sub
  10  * license, and/or sell copies of the Software, and to permit persons to whom
  11  * the Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29 #include "mga_common.h"
  30 #include "mga_xmesa.h"
  31 #include "context.h"
  32 #include "matrix.h"
  33 #include "simple_list.h"
  34 #include "imports.h"
  35
  36 #include "swrast/swrast.h"
  37 #include "swrast_setup/swrast_setup.h"
  38 #include "tnl/tnl.h"
  39 #include "array_cache/acache.h"
  40
  41 #include "tnl/t_pipeline.h"
  42
  43 #include "mgadd.h"
  44 #include "mgastate.h"
  45 #include "mgatex.h"
  46 #include "mgaspan.h"
  47 #include "mgaioctl.h"
  48 #include "mgatris.h"
  49 #include "mgavb.h"
  50 #include "mgapixel.h"
  51 #include "mga_xmesa.h"
  52 #include "mga_dri.h"
  53
  54
  55 #include "utils.h"
  56 #include "vblank.h"
  57
  58 #ifndef _SOLO
  59 #include "glxextensions.h"
  60 #endif
  61
  62 /* MGA configuration
  63  */
  64 #include "xmlpool.h"
  65
  66 const char __driConfigOptions[] =
  67 DRI_CONF_BEGIN
  68     DRI_CONF_SECTION_PERFORMANCE
  69         DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  70     DRI_CONF_SECTION_END
  71     DRI_CONF_SECTION_QUALITY
  72         DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
  73         DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
  74     DRI_CONF_SECTION_END
  75 DRI_CONF_END;
  76 const GLuint __driNConfigOptions = 3;
  77
  78 #ifndef MGA_DEBUG
  79 int MGA_DEBUG = 0;
  80 #endif
  81
  82 static int getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo );
  83
  84 static GLboolean
  85 mgaInitDriver(__DRIscreenPrivate *sPriv)
  86 {
  87    mgaScreenPrivate *mgaScreen;
  88    MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;
  89
  90    if ( ! driCheckDriDdxDrmVersions( sPriv, "MGA", 4, 0, 1, 0, 3, 0 ) )
  91       return GL_FALSE;
  92
  93    /* Allocate the private area */
  94    mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
  95    if (!mgaScreen) {
  96       __driUtilMessage("Couldn't malloc screen struct");
  97       return GL_FALSE;
  98    }
  99
 100    mgaScreen->sPriv = sPriv;
 101    sPriv->private = (void *)mgaScreen;
 102
 103    if (sPriv->drmMinor >= 1) {
 104       int ret;
 105       drmMGAGetParam gp;
 106
 107       gp.param = MGA_PARAM_IRQ_NR;
 108       gp.value = &mgaScreen->irq;
 109
 110       ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
 111                                     &gp, sizeof(gp));
 112       if (ret) {
 113             fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
 114             FREE(mgaScreen);
 115             sPriv->private = NULL;
 116             return GL_FALSE;
 117       }
 118    }
 119
 120    mgaScreen->linecomp_sane = (sPriv->ddxMajor > 1) || (sPriv->ddxMinor > 1)
 121        || ((sPriv->ddxMinor == 1) && (sPriv->ddxPatch > 0));
 122 #ifndef _SOLO
 123    if ( driCompareGLXAPIVersion( 20030813 ) >= 0 ) {
 124       PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
 125           (PFNGLXSCRENABLEEXTENSIONPROC) glXGetProcAddress( (const GLubyte *) "__glXScrEnableExtension" );
 126       void * const psc = sPriv->psc->screenConfigs;
 127
 128       if ( glx_enable_extension != NULL ) {
 129          if ( mgaScreen->linecomp_sane ) {
 130             (*glx_enable_extension)( psc, "GLX_SGI_swap_control" );
 131             (*glx_enable_extension)( psc, "GLX_SGI_video_sync" );
 132             (*glx_enable_extension)( psc, "GLX_MESA_swap_control" );
 133          }
 134
 135          (*glx_enable_extension)( psc, "GLX_SGI_make_current_read" );
 136          (*glx_enable_extension)( psc, "GLX_MESA_swap_frame_usage" );
 137       }
 138    }
 139 #endif
 140
 141    if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
 142        serverInfo->chipset != MGA_CARD_TYPE_G400) {
 143       FREE(mgaScreen);
 144       sPriv->private = NULL;
 145       __driUtilMessage("Unrecognized chipset");
 146       return GL_FALSE;
 147    }
 148
 149
 150    mgaScreen->chipset = serverInfo->chipset;
 151    mgaScreen->width = serverInfo->width;
 152    mgaScreen->height = serverInfo->height;
 153    mgaScreen->mem = serverInfo->mem;
 154    mgaScreen->cpp = serverInfo->cpp;
 155
 156    mgaScreen->agpMode = serverInfo->agpMode;
 157
 158    mgaScreen->frontPitch = serverInfo->frontPitch;
 159    mgaScreen->frontOffset = serverInfo->frontOffset;
 160    mgaScreen->backOffset = serverInfo->backOffset;
 161    mgaScreen->backPitch  =  serverInfo->backPitch;
 162    mgaScreen->depthOffset = serverInfo->depthOffset;
 163    mgaScreen->depthPitch  =  serverInfo->depthPitch;
 164
 165    mgaScreen->mmio.handle = serverInfo->registers.handle;
 166    mgaScreen->mmio.size = serverInfo->registers.size;
 167    if ( drmMap( sPriv->fd,
 168                 mgaScreen->mmio.handle, mgaScreen->mmio.size,
 169                 &mgaScreen->mmio.map ) < 0 ) {
 170       FREE( mgaScreen );
 171       sPriv->private = NULL;
 172       __driUtilMessage( "Couldn't map MMIO registers" );
 173       return GL_FALSE;
 174    }
 175
 176    mgaScreen->primary.handle = serverInfo->primary.handle;
 177    mgaScreen->primary.size = serverInfo->primary.size;
 178    mgaScreen->buffers.handle = serverInfo->buffers.handle;
 179    mgaScreen->buffers.size = serverInfo->buffers.size;
 180
 181 #if 0
 182    mgaScreen->agp.handle = serverInfo->agp;
 183    mgaScreen->agp.size = serverInfo->agpSize;
 184
 185    if (drmMap(sPriv->fd,
 186               mgaScreen->agp.handle,
 187               mgaScreen->agp.size,
 188               (drmAddress *)&mgaScreen->agp.map) != 0)
 189    {
 190       Xfree(mgaScreen);
 191       sPriv->private = NULL;
 192       __driUtilMessage("Couldn't map agp region");
 193       return GL_FALSE;
 194    }
 195 #endif
 196
 197    mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
 198    mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
 199                                              PDEA_pagpxfer_enable | 1);
 200
 201    mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
 202    mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;
 203
 204    mgaScreen->logTextureGranularity[MGA_CARD_HEAP] =
 205       serverInfo->logTextureGranularity;
 206    mgaScreen->logTextureGranularity[MGA_AGP_HEAP] =
 207       serverInfo->logAgpTextureGranularity;
 208
 209    mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
 210                                            serverInfo->textureOffset);
 211    if (drmMap(sPriv->fd,
 212               serverInfo->agpTextureOffset,
 213               serverInfo->agpTextureSize,
 214               (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0)
 215    {
 216       FREE(mgaScreen);
 217       sPriv->private = NULL;
 218       __driUtilMessage("Couldn't map agptexture region");
 219       return GL_FALSE;
 220    }
 221
 222 #if 0
 223    mgaScreen->texVirtual[MGA_AGP_HEAP] = (mgaScreen->agp.map +
 224                                           serverInfo->agpTextureOffset);
 225 #endif
 226
 227    mgaScreen->mAccess = serverInfo->mAccess;
 228
 229    /* For calculating setupdma addresses.
 230     */
 231    mgaScreen->dmaOffset = serverInfo->buffers.handle;
 232
 233    mgaScreen->bufs = drmMapBufs(sPriv->fd);
 234    if (!mgaScreen->bufs) {
 235       /*drmUnmap(mgaScreen->agp_tex.map, mgaScreen->agp_tex.size);*/
 236       FREE(mgaScreen);
 237       sPriv->private = NULL;
 238       __driUtilMessage("Couldn't map dma buffers");
 239       return GL_FALSE;
 240    }
 241    mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;
 242
 243    /* parse information in __driConfigOptions */
 244    driParseOptionInfo (&mgaScreen->optionCache);
 245
 246    return GL_TRUE;
 247 }
 248
 249
 250 static void
 251 mgaDestroyScreen(__DRIscreenPrivate *sPriv)
 252 {
 253    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;
 254
 255    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 256       fprintf(stderr, "mgaDestroyScreen\n");
 257
 258    /*drmUnmap(mgaScreen->agp_tex.map, mgaScreen->agp_tex.size);*/
 259
 260    /* free all option information */
 261    driDestroyOptionInfo (&mgaScreen->optionCache);
 262
 263    FREE(mgaScreen);
 264    sPriv->private = NULL;
 265 }
 266
 267
 268 extern const struct tnl_pipeline_stage _mga_render_stage;
 269
 270 static const struct tnl_pipeline_stage *mga_pipeline[] = {
 271    &_tnl_vertex_transform_stage,
 272    &_tnl_normal_transform_stage,
 273    &_tnl_lighting_stage,
 274    &_tnl_fog_coordinate_stage,
 275    &_tnl_texgen_stage,
 276    &_tnl_texture_transform_stage,
 277                                 /* REMOVE: point attenuation stage */
 278 #if 0
 279    &_mga_render_stage,          /* ADD: unclipped rastersetup-to-dma */
 280                                 /* Need new ioctl for wacceptseq */
 281 #endif
 282    &_tnl_render_stage,
 283    0,
 284 };
 285
 286
 287 static const char * const g400_extensions[] =
 288 {
 289    "GL_ARB_multitexture",
 290    "GL_ARB_texture_env_add",
 291    "GL_EXT_texture_env_add",
 292    "GL_ARB_texture_env_combine",
 293    "GL_EXT_texture_env_combine",
 294    "GL_ARB_texture_env_crossbar",
 295    "GL_ATI_texture_env_combine3",
 296    "GL_EXT_texture_edge_clamp",
 297    "GL_SGIS_texture_edge_clamp",
 298 #if defined (MESA_packed_depth_stencil)
 299    "GL_MESA_packed_depth_stencil",
 300 #endif
 301    NULL
 302 };
 303
 304 static const char * const card_extensions[] =
 305 {
 306    "GL_ARB_multisample",
 307    "GL_ARB_texture_compression",
 308    "GL_EXT_blend_logic_op",
 309    "GL_EXT_fog_coord",
 310    /* paletted_textures currently doesn't work, but we could fix them later */
 311 #if 0
 312    "GL_EXT_shared_texture_palette",
 313    "GL_EXT_paletted_texture",
 314 #endif
 315    "GL_EXT_secondary_color",
 316    "GL_EXT_stencil_wrap",
 317    "GL_MESA_ycbcr_texture",
 318    "GL_SGIS_generate_mipmap",
 319    "GL_SGIS_texture_lod",
 320    "GL_NV_texture_rectangle",
 321    NULL
 322 };
 323
 324 static const struct dri_debug_control debug_control[] =
 325 {
 326     { "fall",  DEBUG_VERBOSE_FALLBACK },
 327     { "tex",   DEBUG_VERBOSE_TEXTURE },
 328     { "ioctl", DEBUG_VERBOSE_IOCTL },
 329     { "verb",  DEBUG_VERBOSE_MSG },
 330     { "dri",   DEBUG_VERBOSE_DRI },
 331     { NULL,    0 }
 332 };
 333
 334
 335 static int
 336 get_ust_nop( int64_t * ust )
 337 {
 338    *ust = 1;
 339    return 0;
 340 }
 341
 342
 343 static GLboolean
 344 mgaCreateContext( const __GLcontextModes *mesaVis,
 345                   __DRIcontextPrivate *driContextPriv,
 346                   void *sharedContextPrivate )
 347 {
 348    int i;
 349    unsigned   maxlevels;
 350    GLcontext *ctx, *shareCtx;
 351    mgaContextPtr mmesa;
 352    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 353    mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
 354    MGASAREAPrivPtr saPriv=(MGASAREAPrivPtr)(((char*)sPriv->pSAREA)+
 355                                               mgaScreen->sarea_priv_offset);
 356
 357    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 358       fprintf(stderr, "mgaCreateContext\n");
 359
 360    /* allocate mga context */
 361    mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
 362    if (!mmesa) {
 363       return GL_FALSE;
 364    }
 365
 366    /* Allocate the Mesa context */
 367    if (sharedContextPrivate)
 368       shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
 369    else
 370       shareCtx = NULL;
 371    mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx, (void *) mmesa, GL_TRUE);
 372    if (!mmesa->glCtx) {
 373       FREE(mmesa);
 374       return GL_FALSE;
 375    }
 376    driContextPriv->driverPrivate = mmesa;
 377
 378    /* Init mga state */
 379    mmesa->hHWContext = driContextPriv->hHWContext;
 380    mmesa->driFd = sPriv->fd;
 381    mmesa->driHwLock = &sPriv->pSAREA->lock;
 382
 383    mmesa->mgaScreen = mgaScreen;
 384    mmesa->driScreen = sPriv;
 385    mmesa->sarea = (void *)saPriv;
 386
 387    /* Parse configuration files */
 388    driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
 389                         sPriv->myNum, "mga");
 390
 391    (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
 392    make_empty_list( & mmesa->swapped );
 393
 394    mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
 395    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 396       mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
 397             mgaScreen->textureSize[i],
 398             6,
 399             MGA_NR_TEX_REGIONS,
 400             mmesa->sarea->texList[i],
 401             & mmesa->sarea->texAge[i],
 402             & mmesa->swapped,
 403             sizeof( mgaTextureObject_t ),
 404             (destroy_texture_object_t *) mgaDestroyTexObj );
 405    }
 406
 407    /* Set the maximum texture size small enough that we can guarentee
 408     * that both texture units can bind a maximal texture and have them
 409     * on the card at once.
 410     */
 411    ctx = mmesa->glCtx;
 412    if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
 413       ctx->Const.MaxTextureUnits = 1;
 414       maxlevels = G200_TEX_MAXLEVELS;
 415
 416    }
 417    else {
 418       ctx->Const.MaxTextureUnits = 2;
 419       maxlevels = G400_TEX_MAXLEVELS;
 420    }
 421
 422    driCalculateMaxTextureLevels( mmesa->texture_heaps,
 423                                  mmesa->nr_heaps,
 424                                  & ctx->Const,
 425                                  4,
 426                                  11, /* max 2D texture size is 2048x2048 */
 427                                  0,  /* 3D textures unsupported. */
 428                                  0,  /* cube textures unsupported. */
 429                                  11, /* max texture rect size is 2048x2048 */
 430                                  maxlevels,
 431                                  GL_FALSE );
 432
 433    ctx->Const.MinLineWidth = 1.0;
 434    ctx->Const.MinLineWidthAA = 1.0;
 435    ctx->Const.MaxLineWidth = 10.0;
 436    ctx->Const.MaxLineWidthAA = 10.0;
 437    ctx->Const.LineWidthGranularity = 1.0;
 438
 439    mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
 440                                            "texture_depth");
 441    if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
 442       mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
 443          DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
 444    mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 445
 446    switch (mesaVis->depthBits) {
 447    case 16:
 448       mmesa->depth_scale = 1.0/(GLdouble)0xffff;
 449       mmesa->depth_clear_mask = ~0;
 450       mmesa->ClearDepth = 0xffff;
 451       break;
 452    case 24:
 453       mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
 454       if (mmesa->hw_stencil) {
 455          mmesa->depth_clear_mask = 0xffffff00;
 456          mmesa->stencil_clear_mask = 0x000000ff;
 457       } else
 458          mmesa->depth_clear_mask = ~0;
 459       mmesa->ClearDepth = 0xffffff00;
 460       break;
 461    case 32:
 462       mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
 463       mmesa->depth_clear_mask = ~0;
 464       mmesa->ClearDepth = 0xffffffff;
 465       break;
 466    };
 467
 468    mmesa->haveHwStipple = GL_FALSE;
 469    mmesa->RenderIndex = -1;             /* impossible value */
 470    mmesa->dirty = ~0;
 471    mmesa->vertex_format = 0;
 472    mmesa->CurrentTexObj[0] = 0;
 473    mmesa->CurrentTexObj[1] = 0;
 474    mmesa->tmu_source[0] = 0;
 475    mmesa->tmu_source[1] = 1;
 476
 477    mmesa->texAge[0] = 0;
 478    mmesa->texAge[1] = 0;
 479
 480    /* Initialize the software rasterizer and helper modules.
 481     */
 482    _swrast_CreateContext( ctx );
 483    _ac_CreateContext( ctx );
 484    _tnl_CreateContext( ctx );
 485
 486    _swsetup_CreateContext( ctx );
 487
 488    /* Install the customized pipeline:
 489     */
 490    _tnl_destroy_pipeline( ctx );
 491    _tnl_install_pipeline( ctx, mga_pipeline );
 492
 493    /* Configure swrast to match hardware characteristics:
 494     */
 495    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 496    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 497
 498    mmesa->primary_offset = mmesa->mgaScreen->primary.handle;
 499
 500    ctx->DriverCtx = (void *) mmesa;
 501    mmesa->glCtx = ctx;
 502
 503    driInitExtensions( ctx, card_extensions, GL_FALSE );
 504
 505    if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
 506       driInitExtensions( ctx, g400_extensions, GL_FALSE );
 507    }
 508
 509    mgaDDInitStateFuncs( ctx );
 510    mgaDDInitTextureFuncs( ctx );
 511    mgaDDInitSpanFuncs( ctx );
 512    mgaDDInitDriverFuncs( ctx );
 513    mgaDDInitIoctlFuncs( ctx );
 514    mgaDDInitPixelFuncs( ctx );
 515    mgaDDInitTriFuncs( ctx );
 516
 517    mgaInitVB( ctx );
 518    mgaInitState( mmesa );
 519
 520    driContextPriv->driverPrivate = (void *) mmesa;
 521
 522 #if DO_DEBUG
 523    MGA_DEBUG = driParseDebugString( getenv( "MGA_DEBUG" ),
 524                                     debug_control );
 525 #endif
 526
 527    mmesa->vblank_flags = ((mmesa->mgaScreen->irq == 0)
 528                           || !mmesa->mgaScreen->linecomp_sane)
 529        ? VBLANK_FLAG_NO_IRQ : driGetDefaultVBlankFlags(&mmesa->optionCache);
 530 #ifndef _SOLO
 531    mmesa->get_ust = (PFNGLXGETUSTPROC) glXGetProcAddress( (const GLubyte *) "__glXGetUST" );
 532    if ( mmesa->get_ust == NULL ) {
 533       mmesa->get_ust = get_ust_nop;
 534    }
 535 #else
 536    mmesa->get_ust = get_ust_nop;
 537 #endif
 538
 539    (*mmesa->get_ust)( & mmesa->swap_ust );
 540
 541    return GL_TRUE;
 542 }
 543
 544 static void
 545 mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
 546 {
 547    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 548
 549    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 550       fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
 551                __FILE__, __LINE__ );
 552
 553    assert(mmesa); /* should never be null */
 554    if (mmesa) {
 555       GLboolean   release_texture_heaps;
 556
 557
 558       release_texture_heaps = (mmesa->glCtx->Shared->RefCount == 1);
 559       _swsetup_DestroyContext( mmesa->glCtx );
 560       _tnl_DestroyContext( mmesa->glCtx );
 561       _ac_DestroyContext( mmesa->glCtx );
 562       _swrast_DestroyContext( mmesa->glCtx );
 563
 564       mgaFreeVB( mmesa->glCtx );
 565
 566       /* free the Mesa context */
 567       mmesa->glCtx->DriverCtx = NULL;
 568       _mesa_destroy_context(mmesa->glCtx);
 569
 570       if ( release_texture_heaps ) {
 571          /* This share group is about to go away, free our private
 572           * texture object data.
 573           */
 574          int i;
 575
 576          assert( is_empty_list( & mmesa->swapped ) );
 577
 578          for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 579             driDestroyTextureHeap( mmesa->texture_heaps[ i ] );
 580             mmesa->texture_heaps[ i ] = NULL;
 581          }
 582       }
 583
 584       /* free the option cache */
 585       driDestroyOptionCache (&mmesa->optionCache);
 586
 587       FREE(mmesa);
 588    }
 589
 590    if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
 591       fprintf( stderr, "[%s:%d] mgaDestroyContext done\n",
 592                __FILE__, __LINE__ );
 593 }
 594
 595
 596 static GLboolean
 597 mgaCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 598                  __DRIdrawablePrivate *driDrawPriv,
 599                  const __GLcontextModes *mesaVis,
 600                  GLboolean isPixmap )
 601 {
 602    if (isPixmap) {
 603       return GL_FALSE; /* not implemented */
 604    }
 605    else {
 606       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 607                              mesaVis->depthBits != 24);
 608
 609       driDrawPriv->driverPrivate = (void *)
 610          _mesa_create_framebuffer(mesaVis,
 611                                   GL_FALSE,  /* software depth buffer? */
 612                                   swStencil,
 613                                   mesaVis->accumRedBits > 0,
 614                                   mesaVis->alphaBits > 0 );
 615
 616       return (driDrawPriv->driverPrivate != NULL);
 617    }
 618 }
 619
 620
 621 static void
 622 mgaDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 623 {
 624    _mesa_destroy_framebuffer((GLframebuffer *) (driDrawPriv->driverPrivate));
 625 }
 626
 627 static void
 628 mgaSwapBuffers(__DRIdrawablePrivate *dPriv)
 629 {
 630    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 631       mgaContextPtr mmesa;
 632       GLcontext *ctx;
 633       mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 634       ctx = mmesa->glCtx;
 635
 636       if (ctx->Visual.doubleBufferMode) {
 637          _mesa_notifySwapBuffers( ctx );
 638          mgaCopyBuffer( dPriv );
 639       }
 640    } else {
 641       /* XXX this shouldn't be an error but we can't handle it for now */
 642       _mesa_problem(NULL, "%s: drawable has no context!\n", __FUNCTION__);
 643    }
 644 }
 645
 646 static GLboolean
 647 mgaUnbindContext(__DRIcontextPrivate *driContextPriv)
 648 {
 649    mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 650    if (mmesa)
 651       mmesa->dirty = ~0;
 652
 653    return GL_TRUE;
 654 }
 655
 656 static GLboolean
 657 mgaOpenCloseFullScreen(__DRIcontextPrivate *driContextPriv)
 658 {
 659     return GL_TRUE;
 660 }
 661
 662
 663 /* This looks buggy to me - the 'b' variable isn't used anywhere...
 664  * Hmm - It seems that the drawable is already hooked in to
 665  * driDrawablePriv.
 666  *
 667  * But why are we doing context initialization here???
 668  */
 669 static GLboolean
 670 mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
 671                __DRIdrawablePrivate *driDrawPriv,
 672                __DRIdrawablePrivate *driReadPriv)
 673 {
 674    if (driContextPriv) {
 675       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 676
 677       if (mmesa->driDrawable != driDrawPriv) {
 678          driDrawableInitVBlank( driDrawPriv, mmesa->vblank_flags );
 679          mmesa->driDrawable = driDrawPriv;
 680          mmesa->dirty = ~0;
 681          mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 682          mmesa->mesa_drawable = driDrawPriv;
 683       }
 684
 685       mmesa->driReadable = driReadPriv;
 686
 687       _mesa_make_current2(mmesa->glCtx,
 688                           (GLframebuffer *) driDrawPriv->driverPrivate,
 689                           (GLframebuffer *) driReadPriv->driverPrivate);
 690
 691       if (!mmesa->glCtx->Viewport.Width)
 692          _mesa_set_viewport(mmesa->glCtx, 0, 0,
 693                             driDrawPriv->w, driDrawPriv->h);
 694
 695    }
 696    else {
 697       _mesa_make_current(NULL, NULL);
 698    }
 699
 700    return GL_TRUE;
 701 }
 702
 703
 704 void mgaGetLock( mgaContextPtr mmesa, GLuint flags )
 705 {
 706    __DRIdrawablePrivate *dPriv = mmesa->driDrawable;
 707    MGASAREAPrivPtr sarea = mmesa->sarea;
 708    int me = mmesa->hHWContext;
 709    int i;
 710
 711    drmGetLock(mmesa->driFd, mmesa->hHWContext, flags);
 712
 713    if (*(dPriv->pStamp) != mmesa->lastStamp) {
 714       mmesa->lastStamp = *(dPriv->pStamp);
 715       mmesa->SetupNewInputs |= VERT_BIT_POS;
 716       mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK);
 717       mgaUpdateRects( mmesa, (MGA_FRONT|MGA_BACK) );
 718    }
 719
 720    mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
 721
 722     mmesa->sarea->dirty |= MGA_UPLOAD_CONTEXT;
 723
 724    if (sarea->ctxOwner != me) {
 725       mmesa->dirty |= (MGA_UPLOAD_CONTEXT | MGA_UPLOAD_TEX0 |
 726                        MGA_UPLOAD_TEX1 | MGA_UPLOAD_PIPE);
 727       sarea->ctxOwner=me;
 728    }
 729
 730    for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
 731       DRI_AGE_TEXTURES( mmesa->texture_heaps[ i ] );
 732    }
 733
 734    sarea->last_quiescent = -1;  /* just kill it for now */
 735 }
 736
 737
 738 static const struct __DriverAPIRec mgaAPI = {
 739    .InitDriver      = mgaInitDriver,
 740    .DestroyScreen   = mgaDestroyScreen,
 741    .CreateContext   = mgaCreateContext,
 742    .DestroyContext  = mgaDestroyContext,
 743    .CreateBuffer    = mgaCreateBuffer,
 744    .DestroyBuffer   = mgaDestroyBuffer,
 745    .SwapBuffers     = mgaSwapBuffers,
 746    .MakeCurrent     = mgaMakeCurrent,
 747    .UnbindContext   = mgaUnbindContext,
 748    .OpenFullScreen  = mgaOpenCloseFullScreen,
 749    .CloseFullScreen = mgaOpenCloseFullScreen,
 750    .GetSwapInfo     = getSwapInfo,
 751    .GetMSC          = driGetMSC32,
 752    .WaitForMSC      = driWaitForMSC32,
 753    .WaitForSBC      = NULL,
 754    .SwapBuffersMSC  = NULL
 755 };
 756
 757
 758 /*
 759  * This is the bootstrap function for the driver.
 760  * The __driCreateScreen name is the symbol that libGL.so fetches.
 761  * Return:  pointer to a __DRIscreenPrivate.
 762  */
 763 #ifndef _SOLO
 764 void *__driCreateScreen(Display *dpy, int scrn, __DRIscreen *psc,
 765                         int numConfigs, __GLXvisualConfig *config)
 766 {
 767    __DRIscreenPrivate *psp;
 768    psp = __driUtilCreateScreen(dpy, scrn, psc, numConfigs, config, &mgaAPI);
 769    return (void *) psp;
 770 }
 771 #else
 772 void *__driCreateScreen(struct DRIDriverRec *driver,
 773                         struct DRIDriverContextRec *driverContext)
 774 {
 775    __DRIscreenPrivate *psp;
 776    psp = __driUtilCreateScreen(driver, driverContext, &mgaAPI);
 777    return (void *) psp;
 778 }
 779 #endif
 780
 781
 782 /**
 783  * Get information about previous buffer swaps.
 784  */
 785 static int
 786 getSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 787 {
 788    mgaContextPtr  mmesa;
 789
 790    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 791         || (dPriv->driContextPriv->driverPrivate == NULL)
 792         || (sInfo == NULL) ) {
 793       return -1;
 794    }
 795
 796    mmesa = (mgaContextPtr) dPriv->driContextPriv->driverPrivate;
 797    sInfo->swap_count = mmesa->swap_count;
 798    sInfo->swap_ust = mmesa->swap_ust;
 799    sInfo->swap_missed_count = mmesa->swap_missed_count;
 800
 801    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 802        ? driCalculateSwapUsage( dPriv, 0, mmesa->swap_missed_ust )
 803        : 0.0;
 804
 805    return 0;
 806 }