src/mesa/drivers/dri/i915/intel_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "glheader.h"
  30 #include "context.h"
  31 #include "matrix.h"
  32 #include "simple_list.h"
  33 #include "extensions.h"
  34 #include "framebuffer.h"
  35 #include "imports.h"
  36 #include "points.h"
  37
  38 #include "swrast/swrast.h"
  39 #include "swrast_setup/swrast_setup.h"
  40 #include "tnl/tnl.h"
  41 #include "vbo/vbo.h"
  42
  43 #include "tnl/t_pipeline.h"
  44 #include "tnl/t_vertex.h"
  45
  46 #include "drivers/common/driverfuncs.h"
  47
  48 #include "intel_screen.h"
  49
  50 #include "i830_dri.h"
  51 #include "i830_common.h"
  52
  53 #include "intel_tex.h"
  54 #include "intel_span.h"
  55 #include "intel_tris.h"
  56 #include "intel_ioctl.h"
  57 #include "intel_batchbuffer.h"
  58
  59 #include "vblank.h"
  60 #include "utils.h"
  61 #include "xmlpool.h" /* for symbolic values of enum-type options */
  62 #ifndef INTEL_DEBUG
  63 int INTEL_DEBUG = (0);
  64 #endif
  65
  66 #define need_GL_ARB_multisample
  67 #define need_GL_ARB_point_parameters
  68 #define need_GL_ARB_texture_compression
  69 #define need_GL_ARB_vertex_buffer_object
  70 #define need_GL_ARB_vertex_program
  71 #define need_GL_ARB_window_pos
  72 #define need_GL_EXT_blend_color
  73 #define need_GL_EXT_blend_equation_separate
  74 #define need_GL_EXT_blend_func_separate
  75 #define need_GL_EXT_blend_minmax
  76 #define need_GL_EXT_cull_vertex
  77 #define need_GL_EXT_fog_coord
  78 #define need_GL_EXT_multi_draw_arrays
  79 #define need_GL_EXT_secondary_color
  80 #define need_GL_NV_vertex_program
  81 #include "extension_helper.h"
  82
  83 #ifndef VERBOSE
  84 int VERBOSE = 0;
  85 #endif
  86
  87 #if DEBUG_LOCKING
  88 char *prevLockFile;
  89 int prevLockLine;
  90 #endif
  91
  92 /***************************************
  93  * Mesa's Driver Functions
  94  ***************************************/
  95
  96 #define DRIVER_DATE "20061017"
  97
  98 const GLubyte *intelGetString( GLcontext *ctx, GLenum name )
  99 {
 100    const char * chipset;
 101    static char buffer[128];
 102
 103    switch (name) {
 104    case GL_VENDOR:
 105       return (GLubyte *)"Tungsten Graphics, Inc";
 106       break;
 107
 108    case GL_RENDERER:
 109       switch (INTEL_CONTEXT(ctx)->intelScreen->deviceID) {
 110       case PCI_CHIP_845_G:
 111          chipset = "Intel(R) 845G"; break;
 112       case PCI_CHIP_I830_M:
 113          chipset = "Intel(R) 830M"; break;
 114       case PCI_CHIP_I855_GM:
 115          chipset = "Intel(R) 852GM/855GM"; break;
 116       case PCI_CHIP_I865_G:
 117          chipset = "Intel(R) 865G"; break;
 118       case PCI_CHIP_I915_G:
 119          chipset = "Intel(R) 915G"; break;
 120       case PCI_CHIP_I915_GM:
 121          chipset = "Intel(R) 915GM"; break;
 122       case PCI_CHIP_I945_G:
 123          chipset = "Intel(R) 945G"; break;
 124       case PCI_CHIP_I945_GM:
 125          chipset = "Intel(R) 945GM"; break;
 126       default:
 127          chipset = "Unknown Intel Chipset"; break;
 128       }
 129
 130       (void) driGetRendererString( buffer, chipset, DRIVER_DATE, 0 );
 131       return (GLubyte *) buffer;
 132
 133    default:
 134       return NULL;
 135    }
 136 }
 137
 138
 139 /**
 140  * Extension strings exported by the intel driver.
 141  *
 142  * \note
 143  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 144  * old i830-specific driver.
 145  */
 146 const struct dri_extension card_extensions[] =
 147 {
 148     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 149     { "GL_ARB_multitexture",               NULL },
 150     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 151     { "GL_ARB_texture_border_clamp",       NULL },
 152     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 153     { "GL_ARB_texture_cube_map",           NULL },
 154     { "GL_ARB_texture_env_add",            NULL },
 155     { "GL_ARB_texture_env_combine",        NULL },
 156     { "GL_ARB_texture_env_dot3",           NULL },
 157     { "GL_ARB_texture_mirrored_repeat",    NULL },
 158     { "GL_ARB_texture_rectangle",          NULL },
 159     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 160     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 161     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 162     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 163     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 164     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 165     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 166     { "GL_EXT_blend_subtract",             NULL },
 167     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 168     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 169     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 170     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 171     { "GL_EXT_stencil_wrap",               NULL },
 172     { "GL_EXT_texture_edge_clamp",         NULL },
 173     { "GL_EXT_texture_env_combine",        NULL },
 174     { "GL_EXT_texture_env_dot3",           NULL },
 175     { "GL_EXT_texture_filter_anisotropic", NULL },
 176     { "GL_EXT_texture_lod_bias",           NULL },
 177     { "GL_3DFX_texture_compression_FXT1",  NULL },
 178     { "GL_APPLE_client_storage",           NULL },
 179     { "GL_MESA_pack_invert",               NULL },
 180     { "GL_MESA_ycbcr_texture",             NULL },
 181     { "GL_NV_blend_square",                NULL },
 182     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions },
 183     { "GL_NV_vertex_program1_1",           NULL },
 184     { "GL_SGIS_generate_mipmap",           NULL },
 185     { NULL,                                NULL }
 186 };
 187
 188 extern const struct tnl_pipeline_stage _intel_render_stage;
 189
 190 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 191    &_tnl_vertex_transform_stage,
 192    &_tnl_vertex_cull_stage,
 193    &_tnl_normal_transform_stage,
 194    &_tnl_lighting_stage,
 195    &_tnl_fog_coordinate_stage,
 196    &_tnl_texgen_stage,
 197    &_tnl_texture_transform_stage,
 198    &_tnl_point_attenuation_stage,
 199    &_tnl_vertex_program_stage,
 200 #if 1
 201    &_intel_render_stage,     /* ADD: unclipped rastersetup-to-dma */
 202 #endif
 203    &_tnl_render_stage,
 204    0,
 205 };
 206
 207
 208 static const struct dri_debug_control debug_control[] =
 209 {
 210     { "fall",  DEBUG_FALLBACKS },
 211     { "tex",   DEBUG_TEXTURE },
 212     { "ioctl", DEBUG_IOCTL },
 213     { "prim",  DEBUG_PRIMS },
 214     { "vert",  DEBUG_VERTS },
 215     { "state", DEBUG_STATE },
 216     { "verb",  DEBUG_VERBOSE },
 217     { "dri",   DEBUG_DRI },
 218     { "dma",   DEBUG_DMA },
 219     { "san",   DEBUG_SANITY },
 220     { "sync",  DEBUG_SYNC },
 221     { "sleep", DEBUG_SLEEP },
 222     { "pix",   DEBUG_PIXEL },
 223     { NULL,    0 }
 224 };
 225
 226
 227 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 228 {
 229    _swrast_InvalidateState( ctx, new_state );
 230    _swsetup_InvalidateState( ctx, new_state );
 231    _vbo_InvalidateState( ctx, new_state );
 232    _tnl_InvalidateState( ctx, new_state );
 233    _tnl_invalidate_vertex_state( ctx, new_state );
 234    INTEL_CONTEXT(ctx)->NewGLState |= new_state;
 235 }
 236
 237
 238 void intelInitDriverFunctions( struct dd_function_table *functions )
 239 {
 240    _mesa_init_driver_functions( functions );
 241
 242    functions->Clear = intelClear;
 243    functions->Flush = intelglFlush;
 244    functions->Finish = intelFinish;
 245    functions->GetString = intelGetString;
 246    functions->UpdateState = intelInvalidateState;
 247
 248    intelInitTextureFuncs( functions );
 249    intelInitPixelFuncs( functions );
 250    intelInitStateFuncs( functions );
 251 }
 252
 253 static void intel_emit_invarient_state( GLcontext *ctx )
 254 {
 255 }
 256
 257
 258
 259 GLboolean intelInitContext( intelContextPtr intel,
 260                             const __GLcontextModes *mesaVis,
 261                             __DRIcontextPrivate *driContextPriv,
 262                             void *sharedContextPrivate,
 263                             struct dd_function_table *functions )
 264 {
 265    GLcontext *ctx = &intel->ctx;
 266    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 267    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 268    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 269    drmI830Sarea *saPriv = (drmI830Sarea *)
 270       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 271    int fthrottle_mode;
 272
 273    if (!_mesa_initialize_context(&intel->ctx,
 274                                  mesaVis, shareCtx,
 275                                  functions,
 276                                  (void*) intel))
 277       return GL_FALSE;
 278
 279    driContextPriv->driverPrivate = intel;
 280    intel->intelScreen = intelScreen;
 281    intel->driScreen = sPriv;
 282    intel->sarea = saPriv;
 283
 284
 285    (void) memset( intel->texture_heaps, 0, sizeof( intel->texture_heaps ) );
 286    make_empty_list( & intel->swapped );
 287
 288    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 289                         intel->driScreen->myNum, "i915");
 290
 291    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 292
 293    ctx->Const.MinLineWidth = 1.0;
 294    ctx->Const.MinLineWidthAA = 1.0;
 295    ctx->Const.MaxLineWidth = 3.0;
 296    ctx->Const.MaxLineWidthAA = 3.0;
 297    ctx->Const.LineWidthGranularity = 1.0;
 298
 299    ctx->Const.MinPointSize = 1.0;
 300    ctx->Const.MinPointSizeAA = 1.0;
 301    ctx->Const.MaxPointSize = 255.0;
 302    ctx->Const.MaxPointSizeAA = 3.0;
 303    ctx->Const.PointSizeGranularity = 1.0;
 304
 305    /* reinitialize the context point state.
 306     * It depend on constants in __GLcontextRec::Const
 307     */
 308    _mesa_init_point(ctx);
 309
 310    /* Initialize the software rasterizer and helper modules. */
 311    _swrast_CreateContext( ctx );
 312    _vbo_CreateContext( ctx );
 313    _tnl_CreateContext( ctx );
 314    _swsetup_CreateContext( ctx );
 315
 316    /* Install the customized pipeline: */
 317    _tnl_destroy_pipeline( ctx );
 318    _tnl_install_pipeline( ctx, intel_pipeline );
 319
 320    /* Configure swrast to match hardware characteristics: */
 321    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 322    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 323
 324    /* Dri stuff */
 325    intel->hHWContext = driContextPriv->hHWContext;
 326    intel->driFd = sPriv->fd;
 327    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 328
 329    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 330    intel->hw_stipple = 1;
 331
 332    switch(mesaVis->depthBits) {
 333    case 0:                      /* what to do in this case? */
 334    case 16:
 335       intel->depth_scale = 1.0/0xffff;
 336       intel->polygon_offset_scale = 1.0/0xffff;
 337       intel->depth_clear_mask = ~0;
 338       intel->ClearDepth = 0xffff;
 339       break;
 340    case 24:
 341       intel->depth_scale = 1.0/0xffffff;
 342       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 343       intel->depth_clear_mask = 0x00ffffff;
 344       intel->stencil_clear_mask = 0xff000000;
 345       intel->ClearDepth = 0x00ffffff;
 346       break;
 347    default:
 348       assert(0);
 349       break;
 350    }
 351
 352    /* Initialize swrast, tnl driver tables: */
 353    intelInitSpanFuncs( ctx );
 354    intelInitTriFuncs( ctx );
 355
 356
 357    intel->RenderIndex = ~0;
 358
 359    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 360    intel->iw.irq_seq = -1;
 361    intel->irqsEmitted = 0;
 362
 363    intel->do_irqs = (intel->intelScreen->irq_active &&
 364                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 365
 366    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 367
 368    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 369        ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 370
 371    (*dri_interface->getUST)(&intel->swap_ust);
 372    _math_matrix_ctr (&intel->ViewportMatrix);
 373
 374    driInitExtensions( ctx, card_extensions, GL_TRUE );
 375
 376    if (intel->ctx.Mesa_DXTn) {
 377      _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 378      _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 379    }
 380    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 381      _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 382    }
 383
 384 /*    driInitTextureObjects( ctx, & intel->swapped, */
 385 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 386 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 387 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 388
 389
 390    intelInitBatchBuffer(&intel->ctx);
 391    intel->prim.flush = intel_emit_invarient_state;
 392    intel->prim.primitive = ~0;
 393
 394
 395 #if DO_DEBUG
 396    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 397                                        debug_control );
 398    INTEL_DEBUG |= driParseDebugString( getenv( "INTEL_DEBUG" ),
 399                                        debug_control );
 400 #endif
 401
 402 #ifndef VERBOSE
 403    if (getenv("INTEL_VERBOSE"))
 404       VERBOSE=1;
 405 #endif
 406
 407    if (getenv("INTEL_NO_RAST") ||
 408        getenv("INTEL_NO_RAST")) {
 409       fprintf(stderr, "disabling 3D rasterization\n");
 410       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 411    }
 412
 413    return GL_TRUE;
 414 }
 415
 416 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 417 {
 418    intelContextPtr intel = (intelContextPtr) driContextPriv->driverPrivate;
 419
 420    assert(intel); /* should never be null */
 421    if (intel) {
 422       GLboolean   release_texture_heaps;
 423
 424       INTEL_FIREVERTICES( intel );
 425
 426       intel->vtbl.destroy( intel );
 427
 428       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 429       _swsetup_DestroyContext (&intel->ctx);
 430       _tnl_DestroyContext (&intel->ctx);
 431       _vbo_DestroyContext (&intel->ctx);
 432
 433       _swrast_DestroyContext (&intel->ctx);
 434       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 435
 436       intelDestroyBatchBuffer(&intel->ctx);
 437
 438
 439       if ( release_texture_heaps ) {
 440          /* This share group is about to go away, free our private
 441           * texture object data.
 442           */
 443          int i;
 444
 445          for ( i = 0 ; i < intel->nr_heaps ; i++ ) {
 446             driDestroyTextureHeap( intel->texture_heaps[ i ] );
 447             intel->texture_heaps[ i ] = NULL;
 448          }
 449
 450          assert( is_empty_list( & intel->swapped ) );
 451       }
 452
 453       /* free the Mesa context */
 454       _mesa_destroy_context(&intel->ctx);
 455    }
 456 }
 457
 458 void intelSetFrontClipRects( intelContextPtr intel )
 459 {
 460    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 461
 462    if (!dPriv) return;
 463
 464    intel->numClipRects = dPriv->numClipRects;
 465    intel->pClipRects = dPriv->pClipRects;
 466    intel->drawX = dPriv->x;
 467    intel->drawY = dPriv->y;
 468 }
 469
 470
 471 void intelSetBackClipRects( intelContextPtr intel )
 472 {
 473    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 474
 475    if (!dPriv) return;
 476
 477    if (intel->sarea->pf_enabled == 0 && dPriv->numBackClipRects == 0) {
 478       intel->numClipRects = dPriv->numClipRects;
 479       intel->pClipRects = dPriv->pClipRects;
 480       intel->drawX = dPriv->x;
 481       intel->drawY = dPriv->y;
 482    } else {
 483       intel->numClipRects = dPriv->numBackClipRects;
 484       intel->pClipRects = dPriv->pBackClipRects;
 485       intel->drawX = dPriv->backX;
 486       intel->drawY = dPriv->backY;
 487
 488       if (dPriv->numBackClipRects == 1 &&
 489           dPriv->x == dPriv->backX &&
 490           dPriv->y == dPriv->backY) {
 491
 492          /* Repeat the calculation of the back cliprect dimensions here
 493           * as early versions of dri.a in the Xserver are incorrect.  Try
 494           * very hard not to restrict future versions of dri.a which
 495           * might eg. allocate truly private back buffers.
 496           */
 497          int x1, y1;
 498          int x2, y2;
 499
 500          x1 = dPriv->x;
 501          y1 = dPriv->y;
 502          x2 = dPriv->x + dPriv->w;
 503          y2 = dPriv->y + dPriv->h;
 504
 505          if (x1 < 0) x1 = 0;
 506          if (y1 < 0) y1 = 0;
 507          if (x2 > intel->intelScreen->width) x2 = intel->intelScreen->width;
 508          if (y2 > intel->intelScreen->height) y2 = intel->intelScreen->height;
 509
 510          if (x1 == dPriv->pBackClipRects[0].x1 &&
 511              y1 == dPriv->pBackClipRects[0].y1) {
 512
 513             dPriv->pBackClipRects[0].x2 = x2;
 514             dPriv->pBackClipRects[0].y2 = y2;
 515          }
 516       }
 517    }
 518 }
 519
 520
 521 void intelWindowMoved( intelContextPtr intel )
 522 {
 523    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 524    GLframebuffer *drawFb = (GLframebuffer *) dPriv->driverPrivate;
 525
 526    if (!intel->ctx.DrawBuffer) {
 527       intelSetFrontClipRects( intel );
 528    }
 529    else {
 530       driUpdateFramebufferSize(&intel->ctx, dPriv);
 531       switch (drawFb->_ColorDrawBufferMask[0]) {
 532       case BUFFER_BIT_FRONT_LEFT:
 533          intelSetFrontClipRects( intel );
 534          break;
 535       case BUFFER_BIT_BACK_LEFT:
 536          intelSetBackClipRects( intel );
 537          break;
 538       default:
 539          /* glDrawBuffer(GL_NONE or GL_FRONT_AND_BACK): software fallback */
 540          intelSetFrontClipRects( intel );
 541       }
 542    }
 543
 544    if (drawFb->Width != dPriv->w || drawFb->Height != dPriv->h) {
 545       /* update Mesa's notion of framebuffer/window size */
 546       _mesa_resize_framebuffer(&intel->ctx, drawFb, dPriv->w, dPriv->h);
 547       drawFb->Initialized = GL_TRUE; /* XXX remove someday */
 548    }
 549
 550    /* Set state we know depends on drawable parameters:
 551     */
 552    {
 553       GLcontext *ctx = &intel->ctx;
 554
 555       if (intel->intelScreen->driScrnPriv->ddxMinor >= 7) {
 556          drmI830Sarea *sarea = intel->sarea;
 557          drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
 558                                       .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
 559          drm_clip_rect_t pipeA_rect = { .x1 = sarea->pipeA_x,
 560                                         .x2 = sarea->pipeA_x + sarea->pipeA_w,
 561                                         .y1 = sarea->pipeA_y,
 562                                         .y2 = sarea->pipeA_y + sarea->pipeA_h };
 563          drm_clip_rect_t pipeB_rect = { .x1 = sarea->pipeB_x,
 564                                         .x2 = sarea->pipeB_x + sarea->pipeB_w,
 565                                         .y1 = sarea->pipeB_y,
 566                                         .y2 = sarea->pipeB_y + sarea->pipeB_h };
 567          GLint areaA = driIntersectArea( drw_rect, pipeA_rect );
 568          GLint areaB = driIntersectArea( drw_rect, pipeB_rect );
 569          GLuint flags = intel->vblank_flags;
 570
 571          if (areaB > areaA || (areaA == areaB && areaB > 0)) {
 572             flags = intel->vblank_flags | VBLANK_FLAG_SECONDARY;
 573          } else {
 574             flags = intel->vblank_flags & ~VBLANK_FLAG_SECONDARY;
 575          }
 576
 577          if (flags != intel->vblank_flags) {
 578             intel->vblank_flags = flags;
 579             driGetCurrentVBlank(dPriv, intel->vblank_flags, &intel->vbl_seq);
 580          }
 581       } else {
 582          intel->vblank_flags &= ~VBLANK_FLAG_SECONDARY;
 583       }
 584
 585       ctx->Driver.Scissor( ctx, ctx->Scissor.X, ctx->Scissor.Y,
 586                            ctx->Scissor.Width, ctx->Scissor.Height );
 587
 588       ctx->Driver.DepthRange( ctx,
 589                               ctx->Viewport.Near,
 590                               ctx->Viewport.Far );
 591    }
 592 }
 593
 594 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 595 {
 596    return GL_TRUE;
 597 }
 598
 599 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 600                           __DRIdrawablePrivate *driDrawPriv,
 601                           __DRIdrawablePrivate *driReadPriv)
 602 {
 603
 604    if (driContextPriv) {
 605       intelContextPtr intel = (intelContextPtr) driContextPriv->driverPrivate;
 606
 607       if ( intel->driDrawable != driDrawPriv ) {
 608          /* Shouldn't the readbuffer be stored also? */
 609          driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
 610                                 &intel->vbl_seq );
 611
 612          intel->driDrawable = driDrawPriv;
 613          intelWindowMoved( intel );
 614       }
 615
 616       _mesa_make_current(&intel->ctx,
 617                          (GLframebuffer *) driDrawPriv->driverPrivate,
 618                          (GLframebuffer *) driReadPriv->driverPrivate);
 619
 620       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 621    } else {
 622       _mesa_make_current(NULL, NULL, NULL);
 623    }
 624
 625    return GL_TRUE;
 626 }
 627
 628 /**
 629  * Use the information in the sarea to update the screen parameters
 630  * related to screen rotation.
 631  */
 632 static void
 633 intelUpdateScreenRotation(intelContextPtr intel,
 634                           __DRIscreenPrivate *sPriv,
 635                           drmI830Sarea *sarea)
 636 {
 637    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 638    intelRegion *colorBuf;
 639
 640    intelUnmapScreenRegions(intelScreen);
 641
 642    intelUpdateScreenFromSAREA(intelScreen, sarea);
 643
 644    /* update the current hw offsets for the color and depth buffers */
 645    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT)
 646       colorBuf = &intelScreen->back;
 647    else
 648       colorBuf = &intelScreen->front;
 649    intel->vtbl.update_color_z_regions(intel, colorBuf, &intelScreen->depth);
 650
 651    if (!intelMapScreenRegions(sPriv)) {
 652       fprintf(stderr, "ERROR Remapping screen regions!!!\n");
 653    }
 654 }
 655
 656 void intelGetLock( intelContextPtr intel, GLuint flags )
 657 {
 658    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 659    __DRIscreenPrivate *sPriv = intel->driScreen;
 660    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 661    drmI830Sarea * sarea = intel->sarea;
 662    unsigned   i;
 663
 664    drmGetLock(intel->driFd, intel->hHWContext, flags);
 665
 666    /* If the window moved, may need to set a new cliprect now.
 667     *
 668     * NOTE: This releases and regains the hw lock, so all state
 669     * checking must be done *after* this call:
 670     */
 671    if (dPriv)
 672       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 673
 674    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 675       intelWindowMoved( intel );
 676       intel->lastStamp = dPriv->lastStamp;
 677    }
 678
 679    /* If we lost context, need to dump all registers to hardware.
 680     * Note that we don't care about 2d contexts, even if they perform
 681     * accelerated commands, so the DRI locking in the X server is even
 682     * more broken than usual.
 683     */
 684
 685    if (sarea->width != intelScreen->width ||
 686        sarea->height != intelScreen->height ||
 687        sarea->rotation != intelScreen->current_rotation) {
 688       intelUpdateScreenRotation(intel, sPriv, sarea);
 689
 690       /* This will drop the outstanding batchbuffer on the floor */
 691       intel->batch.ptr -= (intel->batch.size - intel->batch.space);
 692       intel->batch.space = intel->batch.size;
 693       /* lose all primitives */
 694       intel->prim.primitive = ~0;
 695       intel->prim.start_ptr = 0;
 696       intel->prim.flush = 0;
 697       intel->vtbl.lost_hardware( intel );
 698
 699       intel->lastStamp = 0; /* force window update */
 700
 701       /* Release batch buffer
 702        */
 703       intelDestroyBatchBuffer(&intel->ctx);
 704       intelInitBatchBuffer(&intel->ctx);
 705       intel->prim.flush = intel_emit_invarient_state;
 706
 707       /* Still need to reset the global LRU?
 708        */
 709       intel_driReinitTextureHeap( intel->texture_heaps[0], intel->intelScreen->tex.size );
 710    }
 711
 712    /* Shared texture managment - if another client has played with
 713     * texture space, figure out which if any of our textures have been
 714     * ejected, and update our global LRU.
 715     */
 716    for ( i = 0 ; i < intel->nr_heaps ; i++ ) {
 717       DRI_AGE_TEXTURES( intel->texture_heaps[ i ] );
 718    }
 719 }
 720
 721
 722 void intelSwapBuffers( __DRIdrawablePrivate *dPriv )
 723 {
 724    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 725       intelContextPtr intel;
 726       GLcontext *ctx;
 727       intel = (intelContextPtr) dPriv->driContextPriv->driverPrivate;
 728       ctx = &intel->ctx;
 729       if (ctx->Visual.doubleBufferMode) {
 730          intelScreenPrivate *screen = intel->intelScreen;
 731          _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
 732          if ( 0 /*intel->doPageFlip*/ ) { /* doPageFlip is never set !!! */
 733             intelPageFlip( dPriv );
 734          } else {
 735              intelCopyBuffer( dPriv, NULL );
 736          }
 737          if (screen->current_rotation != 0) {
 738             intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 739          }
 740       }
 741    } else {
 742       /* XXX this shouldn't be an error but we can't handle it for now */
 743       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 744    }
 745 }
 746
 747 void intelCopySubBuffer( __DRIdrawablePrivate *dPriv,
 748                          int x, int y, int w, int h )
 749 {
 750    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 751       intelContextPtr intel;
 752       GLcontext *ctx;
 753       intel = (intelContextPtr) dPriv->driContextPriv->driverPrivate;
 754       ctx = &intel->ctx;
 755       if (ctx->Visual.doubleBufferMode) {
 756          drm_clip_rect_t rect;
 757          rect.x1 = x + dPriv->x;
 758          rect.y1 = (dPriv->h - y - h) + dPriv->y;
 759          rect.x2 = rect.x1 + w;
 760          rect.y2 = rect.y1 + h;
 761          _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
 762          intelCopyBuffer( dPriv, &rect );
 763       }
 764    } else {
 765       /* XXX this shouldn't be an error but we can't handle it for now */
 766       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 767    }
 768 }