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       case PCI_CHIP_I945_GME:
 127          chipset = "Intel(R) 945GME"; break;
 128       case PCI_CHIP_G33_G:
 129          chipset = "Intel(R) G33"; break;
 130       case PCI_CHIP_Q35_G:
 131          chipset = "Intel(R) Q35"; break;
 132       case PCI_CHIP_Q33_G:
 133          chipset = "Intel(R) Q33"; break;
 134       default:
 135          chipset = "Unknown Intel Chipset"; break;
 136       }
 137
 138       (void) driGetRendererString( buffer, chipset, DRIVER_DATE, 0 );
 139       return (GLubyte *) buffer;
 140
 141    default:
 142       return NULL;
 143    }
 144 }
 145
 146
 147 /**
 148  * Extension strings exported by the intel driver.
 149  *
 150  * \note
 151  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 152  * old i830-specific driver.
 153  */
 154 const struct dri_extension card_extensions[] =
 155 {
 156     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
 157     { "GL_ARB_multitexture",               NULL },
 158     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
 159     { "GL_ARB_texture_border_clamp",       NULL },
 160     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
 161     { "GL_ARB_texture_cube_map",           NULL },
 162     { "GL_ARB_texture_env_add",            NULL },
 163     { "GL_ARB_texture_env_combine",        NULL },
 164     { "GL_ARB_texture_env_dot3",           NULL },
 165     { "GL_ARB_texture_mirrored_repeat",    NULL },
 166     { "GL_ARB_texture_rectangle",          NULL },
 167     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
 168     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
 169     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
 170     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
 171     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
 172     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
 173     { "GL_EXT_blend_minmax",               GL_EXT_blend_minmax_functions },
 174     { "GL_EXT_blend_subtract",             NULL },
 175     { "GL_EXT_cull_vertex",                GL_EXT_cull_vertex_functions },
 176     { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
 177     { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
 178     { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
 179     { "GL_EXT_stencil_wrap",               NULL },
 180     { "GL_EXT_texture_edge_clamp",         NULL },
 181     { "GL_EXT_texture_env_combine",        NULL },
 182     { "GL_EXT_texture_env_dot3",           NULL },
 183     { "GL_EXT_texture_filter_anisotropic", NULL },
 184     { "GL_EXT_texture_lod_bias",           NULL },
 185     { "GL_3DFX_texture_compression_FXT1",  NULL },
 186     { "GL_APPLE_client_storage",           NULL },
 187     { "GL_MESA_pack_invert",               NULL },
 188     { "GL_MESA_ycbcr_texture",             NULL },
 189     { "GL_NV_blend_square",                NULL },
 190     { "GL_NV_vertex_program",              GL_NV_vertex_program_functions },
 191     { "GL_NV_vertex_program1_1",           NULL },
 192     { "GL_SGIS_generate_mipmap",           NULL },
 193     { NULL,                                NULL }
 194 };
 195
 196 extern const struct tnl_pipeline_stage _intel_render_stage;
 197
 198 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 199    &_tnl_vertex_transform_stage,
 200    &_tnl_vertex_cull_stage,
 201    &_tnl_normal_transform_stage,
 202    &_tnl_lighting_stage,
 203    &_tnl_fog_coordinate_stage,
 204    &_tnl_texgen_stage,
 205    &_tnl_texture_transform_stage,
 206    &_tnl_point_attenuation_stage,
 207    &_tnl_vertex_program_stage,
 208 #if 1
 209    &_intel_render_stage,     /* ADD: unclipped rastersetup-to-dma */
 210 #endif
 211    &_tnl_render_stage,
 212    0,
 213 };
 214
 215
 216 static const struct dri_debug_control debug_control[] =
 217 {
 218     { "fall",  DEBUG_FALLBACKS },
 219     { "tex",   DEBUG_TEXTURE },
 220     { "ioctl", DEBUG_IOCTL },
 221     { "prim",  DEBUG_PRIMS },
 222     { "vert",  DEBUG_VERTS },
 223     { "state", DEBUG_STATE },
 224     { "verb",  DEBUG_VERBOSE },
 225     { "dri",   DEBUG_DRI },
 226     { "dma",   DEBUG_DMA },
 227     { "san",   DEBUG_SANITY },
 228     { "sync",  DEBUG_SYNC },
 229     { "sleep", DEBUG_SLEEP },
 230     { "pix",   DEBUG_PIXEL },
 231     { NULL,    0 }
 232 };
 233
 234
 235 static void intelInvalidateState( GLcontext *ctx, GLuint new_state )
 236 {
 237    _swrast_InvalidateState( ctx, new_state );
 238    _swsetup_InvalidateState( ctx, new_state );
 239    _vbo_InvalidateState( ctx, new_state );
 240    _tnl_InvalidateState( ctx, new_state );
 241    _tnl_invalidate_vertex_state( ctx, new_state );
 242    INTEL_CONTEXT(ctx)->NewGLState |= new_state;
 243 }
 244
 245
 246 void intelInitDriverFunctions( struct dd_function_table *functions )
 247 {
 248    _mesa_init_driver_functions( functions );
 249
 250    functions->Clear = intelClear;
 251    functions->Flush = intelglFlush;
 252    functions->Finish = intelFinish;
 253    functions->GetString = intelGetString;
 254    functions->UpdateState = intelInvalidateState;
 255
 256    intelInitTextureFuncs( functions );
 257    intelInitPixelFuncs( functions );
 258    intelInitStateFuncs( functions );
 259 }
 260
 261 static void intel_emit_invarient_state( GLcontext *ctx )
 262 {
 263 }
 264
 265
 266
 267 GLboolean intelInitContext( intelContextPtr intel,
 268                             const __GLcontextModes *mesaVis,
 269                             __DRIcontextPrivate *driContextPriv,
 270                             void *sharedContextPrivate,
 271                             struct dd_function_table *functions )
 272 {
 273    GLcontext *ctx = &intel->ctx;
 274    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 275    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 276    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 277    drmI830Sarea *saPriv = (drmI830Sarea *)
 278       (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 279    int fthrottle_mode;
 280
 281    if (!_mesa_initialize_context(&intel->ctx,
 282                                  mesaVis, shareCtx,
 283                                  functions,
 284                                  (void*) intel))
 285       return GL_FALSE;
 286
 287    driContextPriv->driverPrivate = intel;
 288    intel->intelScreen = intelScreen;
 289    intel->driScreen = sPriv;
 290    intel->sarea = saPriv;
 291
 292
 293    (void) memset( intel->texture_heaps, 0, sizeof( intel->texture_heaps ) );
 294    make_empty_list( & intel->swapped );
 295
 296    driParseConfigFiles (&intel->optionCache, &intelScreen->optionCache,
 297                         intel->driScreen->myNum, "i915");
 298
 299    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 300
 301    ctx->Const.MinLineWidth = 1.0;
 302    ctx->Const.MinLineWidthAA = 1.0;
 303    ctx->Const.MaxLineWidth = 3.0;
 304    ctx->Const.MaxLineWidthAA = 3.0;
 305    ctx->Const.LineWidthGranularity = 1.0;
 306
 307    ctx->Const.MinPointSize = 1.0;
 308    ctx->Const.MinPointSizeAA = 1.0;
 309    ctx->Const.MaxPointSize = 255.0;
 310    ctx->Const.MaxPointSizeAA = 3.0;
 311    ctx->Const.PointSizeGranularity = 1.0;
 312
 313    /* reinitialize the context point state.
 314     * It depend on constants in __GLcontextRec::Const
 315     */
 316    _mesa_init_point(ctx);
 317
 318    /* Initialize the software rasterizer and helper modules. */
 319    _swrast_CreateContext( ctx );
 320    _vbo_CreateContext( ctx );
 321    _tnl_CreateContext( ctx );
 322    _swsetup_CreateContext( ctx );
 323
 324    /* Install the customized pipeline: */
 325    _tnl_destroy_pipeline( ctx );
 326    _tnl_install_pipeline( ctx, intel_pipeline );
 327
 328    /* Configure swrast to match hardware characteristics: */
 329    _swrast_allow_pixel_fog( ctx, GL_FALSE );
 330    _swrast_allow_vertex_fog( ctx, GL_TRUE );
 331
 332    /* Dri stuff */
 333    intel->hHWContext = driContextPriv->hHWContext;
 334    intel->driFd = sPriv->fd;
 335    intel->driHwLock = (drmLock *) &sPriv->pSAREA->lock;
 336
 337    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 338    intel->hw_stipple = 1;
 339
 340    switch(mesaVis->depthBits) {
 341    case 0:                      /* what to do in this case? */
 342    case 16:
 343       intel->depth_scale = 1.0/0xffff;
 344       intel->polygon_offset_scale = 1.0/0xffff;
 345       intel->depth_clear_mask = ~0;
 346       intel->ClearDepth = 0xffff;
 347       break;
 348    case 24:
 349       intel->depth_scale = 1.0/0xffffff;
 350       intel->polygon_offset_scale = 2.0/0xffffff; /* req'd to pass glean */
 351       intel->depth_clear_mask = 0x00ffffff;
 352       intel->stencil_clear_mask = 0xff000000;
 353       intel->ClearDepth = 0x00ffffff;
 354       break;
 355    default:
 356       assert(0);
 357       break;
 358    }
 359
 360    /* Initialize swrast, tnl driver tables: */
 361    intelInitSpanFuncs( ctx );
 362    intelInitTriFuncs( ctx );
 363
 364
 365    intel->RenderIndex = ~0;
 366
 367    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 368    intel->iw.irq_seq = -1;
 369    intel->irqsEmitted = 0;
 370
 371    intel->do_irqs = (intel->intelScreen->irq_active &&
 372                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 373
 374    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 375
 376    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 377        ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 378
 379    (*dri_interface->getUST)(&intel->swap_ust);
 380    _math_matrix_ctr (&intel->ViewportMatrix);
 381
 382    driInitExtensions( ctx, card_extensions, GL_TRUE );
 383
 384    if (intel->ctx.Mesa_DXTn) {
 385      _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 386      _mesa_enable_extension( ctx, "GL_S3_s3tc" );
 387    }
 388    else if (driQueryOptionb (&intel->optionCache, "force_s3tc_enable")) {
 389      _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
 390    }
 391
 392 /*    driInitTextureObjects( ctx, & intel->swapped, */
 393 /*                        DRI_TEXMGR_DO_TEXTURE_1D | */
 394 /*                        DRI_TEXMGR_DO_TEXTURE_2D |  */
 395 /*                        DRI_TEXMGR_DO_TEXTURE_RECT ); */
 396
 397
 398    intelInitBatchBuffer(&intel->ctx);
 399    intel->prim.flush = intel_emit_invarient_state;
 400    intel->prim.primitive = ~0;
 401
 402
 403 #if DO_DEBUG
 404    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 405                                        debug_control );
 406    INTEL_DEBUG |= driParseDebugString( getenv( "INTEL_DEBUG" ),
 407                                        debug_control );
 408 #endif
 409
 410 #ifndef VERBOSE
 411    if (getenv("INTEL_VERBOSE"))
 412       VERBOSE=1;
 413 #endif
 414
 415    if (getenv("INTEL_NO_RAST") ||
 416        getenv("INTEL_NO_RAST")) {
 417       fprintf(stderr, "disabling 3D rasterization\n");
 418       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 419    }
 420
 421    return GL_TRUE;
 422 }
 423
 424 void intelDestroyContext(__DRIcontextPrivate *driContextPriv)
 425 {
 426    intelContextPtr intel = (intelContextPtr) driContextPriv->driverPrivate;
 427
 428    assert(intel); /* should never be null */
 429    if (intel) {
 430       GLboolean   release_texture_heaps;
 431
 432       INTEL_FIREVERTICES( intel );
 433
 434       intel->vtbl.destroy( intel );
 435
 436       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 437       _swsetup_DestroyContext (&intel->ctx);
 438       _tnl_DestroyContext (&intel->ctx);
 439       _vbo_DestroyContext (&intel->ctx);
 440
 441       _swrast_DestroyContext (&intel->ctx);
 442       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 443
 444       intelDestroyBatchBuffer(&intel->ctx);
 445
 446
 447       if ( release_texture_heaps ) {
 448          /* This share group is about to go away, free our private
 449           * texture object data.
 450           */
 451          int i;
 452
 453          for ( i = 0 ; i < intel->nr_heaps ; i++ ) {
 454             driDestroyTextureHeap( intel->texture_heaps[ i ] );
 455             intel->texture_heaps[ i ] = NULL;
 456          }
 457
 458          assert( is_empty_list( & intel->swapped ) );
 459       }
 460
 461       /* free the Mesa context */
 462       _mesa_destroy_context(&intel->ctx);
 463    }
 464 }
 465
 466 void intelSetFrontClipRects( intelContextPtr intel )
 467 {
 468    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 469
 470    if (!dPriv) return;
 471
 472    intel->numClipRects = dPriv->numClipRects;
 473    intel->pClipRects = dPriv->pClipRects;
 474    intel->drawX = dPriv->x;
 475    intel->drawY = dPriv->y;
 476 }
 477
 478
 479 void intelSetBackClipRects( intelContextPtr intel )
 480 {
 481    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 482
 483    if (!dPriv) return;
 484
 485    if (intel->sarea->pf_enabled == 0 && dPriv->numBackClipRects == 0) {
 486       intel->numClipRects = dPriv->numClipRects;
 487       intel->pClipRects = dPriv->pClipRects;
 488       intel->drawX = dPriv->x;
 489       intel->drawY = dPriv->y;
 490    } else {
 491       intel->numClipRects = dPriv->numBackClipRects;
 492       intel->pClipRects = dPriv->pBackClipRects;
 493       intel->drawX = dPriv->backX;
 494       intel->drawY = dPriv->backY;
 495
 496       if (dPriv->numBackClipRects == 1 &&
 497           dPriv->x == dPriv->backX &&
 498           dPriv->y == dPriv->backY) {
 499
 500          /* Repeat the calculation of the back cliprect dimensions here
 501           * as early versions of dri.a in the Xserver are incorrect.  Try
 502           * very hard not to restrict future versions of dri.a which
 503           * might eg. allocate truly private back buffers.
 504           */
 505          int x1, y1;
 506          int x2, y2;
 507
 508          x1 = dPriv->x;
 509          y1 = dPriv->y;
 510          x2 = dPriv->x + dPriv->w;
 511          y2 = dPriv->y + dPriv->h;
 512
 513          if (x1 < 0) x1 = 0;
 514          if (y1 < 0) y1 = 0;
 515          if (x2 > intel->intelScreen->width) x2 = intel->intelScreen->width;
 516          if (y2 > intel->intelScreen->height) y2 = intel->intelScreen->height;
 517
 518          if (x1 == dPriv->pBackClipRects[0].x1 &&
 519              y1 == dPriv->pBackClipRects[0].y1) {
 520
 521             dPriv->pBackClipRects[0].x2 = x2;
 522             dPriv->pBackClipRects[0].y2 = y2;
 523          }
 524       }
 525    }
 526 }
 527
 528
 529 void intelWindowMoved( intelContextPtr intel )
 530 {
 531    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 532    GLframebuffer *drawFb = (GLframebuffer *) dPriv->driverPrivate;
 533
 534    if (!intel->ctx.DrawBuffer) {
 535       intelSetFrontClipRects( intel );
 536    }
 537    else {
 538       driUpdateFramebufferSize(&intel->ctx, dPriv);
 539       switch (drawFb->_ColorDrawBufferMask[0]) {
 540       case BUFFER_BIT_FRONT_LEFT:
 541          intelSetFrontClipRects( intel );
 542          break;
 543       case BUFFER_BIT_BACK_LEFT:
 544          intelSetBackClipRects( intel );
 545          break;
 546       default:
 547          /* glDrawBuffer(GL_NONE or GL_FRONT_AND_BACK): software fallback */
 548          intelSetFrontClipRects( intel );
 549       }
 550    }
 551
 552    if (drawFb->Width != dPriv->w || drawFb->Height != dPriv->h) {
 553       /* update Mesa's notion of framebuffer/window size */
 554       _mesa_resize_framebuffer(&intel->ctx, drawFb, dPriv->w, dPriv->h);
 555       drawFb->Initialized = GL_TRUE; /* XXX remove someday */
 556    }
 557
 558    /* Set state we know depends on drawable parameters:
 559     */
 560    {
 561       GLcontext *ctx = &intel->ctx;
 562
 563       if (intel->intelScreen->driScrnPriv->ddxMinor >= 7) {
 564          drmI830Sarea *sarea = intel->sarea;
 565          drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
 566                                       .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
 567          drm_clip_rect_t planeA_rect = { .x1 = sarea->planeA_x,
 568                                         .x2 = sarea->planeA_x + sarea->planeA_w,
 569                                         .y1 = sarea->planeA_y,
 570                                         .y2 = sarea->planeA_y + sarea->planeA_h };
 571          drm_clip_rect_t planeB_rect = { .x1 = sarea->planeB_x,
 572                                         .x2 = sarea->planeB_x + sarea->planeB_w,
 573                                         .y1 = sarea->planeB_y,
 574                                         .y2 = sarea->planeB_y + sarea->planeB_h };
 575          GLint areaA = driIntersectArea( drw_rect, planeA_rect );
 576          GLint areaB = driIntersectArea( drw_rect, planeB_rect );
 577          GLuint flags = intel->vblank_flags;
 578
 579          if (areaB > areaA || (areaA == areaB && areaB > 0)) {
 580             flags = intel->vblank_flags | VBLANK_FLAG_SECONDARY;
 581          } else {
 582             flags = intel->vblank_flags & ~VBLANK_FLAG_SECONDARY;
 583          }
 584
 585          if (flags != intel->vblank_flags) {
 586             intel->vblank_flags = flags;
 587             driGetCurrentVBlank(dPriv, intel->vblank_flags, &intel->vbl_seq);
 588          }
 589       } else {
 590          intel->vblank_flags &= ~VBLANK_FLAG_SECONDARY;
 591       }
 592
 593       ctx->Driver.Scissor( ctx, ctx->Scissor.X, ctx->Scissor.Y,
 594                            ctx->Scissor.Width, ctx->Scissor.Height );
 595
 596       ctx->Driver.DepthRange( ctx,
 597                               ctx->Viewport.Near,
 598                               ctx->Viewport.Far );
 599    }
 600 }
 601
 602 GLboolean intelUnbindContext(__DRIcontextPrivate *driContextPriv)
 603 {
 604    return GL_TRUE;
 605 }
 606
 607 GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 608                           __DRIdrawablePrivate *driDrawPriv,
 609                           __DRIdrawablePrivate *driReadPriv)
 610 {
 611
 612    if (driContextPriv) {
 613       intelContextPtr intel = (intelContextPtr) driContextPriv->driverPrivate;
 614
 615       if ( intel->driDrawable != driDrawPriv ) {
 616          /* Shouldn't the readbuffer be stored also? */
 617          driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
 618                                 &intel->vbl_seq );
 619
 620          intel->driDrawable = driDrawPriv;
 621          intelWindowMoved( intel );
 622       }
 623
 624       _mesa_make_current(&intel->ctx,
 625                          (GLframebuffer *) driDrawPriv->driverPrivate,
 626                          (GLframebuffer *) driReadPriv->driverPrivate);
 627
 628       intel->ctx.Driver.DrawBuffer( &intel->ctx, intel->ctx.Color.DrawBuffer[0] );
 629    } else {
 630       _mesa_make_current(NULL, NULL, NULL);
 631    }
 632
 633    return GL_TRUE;
 634 }
 635
 636 /**
 637  * Use the information in the sarea to update the screen parameters
 638  * related to screen rotation.
 639  */
 640 static void
 641 intelUpdateScreenRotation(intelContextPtr intel,
 642                           __DRIscreenPrivate *sPriv,
 643                           drmI830Sarea *sarea)
 644 {
 645    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 646    intelRegion *colorBuf;
 647
 648    intelUnmapScreenRegions(intelScreen);
 649
 650    intelUpdateScreenFromSAREA(intelScreen, sarea);
 651
 652    /* update the current hw offsets for the color and depth buffers */
 653    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT)
 654       colorBuf = &intelScreen->back;
 655    else
 656       colorBuf = &intelScreen->front;
 657    intel->vtbl.update_color_z_regions(intel, colorBuf, &intelScreen->depth);
 658
 659    if (!intelMapScreenRegions(sPriv)) {
 660       fprintf(stderr, "ERROR Remapping screen regions!!!\n");
 661    }
 662 }
 663
 664 void intelGetLock( intelContextPtr intel, GLuint flags )
 665 {
 666    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 667    __DRIscreenPrivate *sPriv = intel->driScreen;
 668    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 669    drmI830Sarea * sarea = intel->sarea;
 670    unsigned   i;
 671
 672    drmGetLock(intel->driFd, intel->hHWContext, flags);
 673
 674    /* If the window moved, may need to set a new cliprect now.
 675     *
 676     * NOTE: This releases and regains the hw lock, so all state
 677     * checking must be done *after* this call:
 678     */
 679    if (dPriv)
 680       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 681
 682    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 683       intelWindowMoved( intel );
 684       intel->lastStamp = dPriv->lastStamp;
 685    }
 686
 687    /* If we lost context, need to dump all registers to hardware.
 688     * Note that we don't care about 2d contexts, even if they perform
 689     * accelerated commands, so the DRI locking in the X server is even
 690     * more broken than usual.
 691     */
 692
 693    if (sarea->width != intelScreen->width ||
 694        sarea->height != intelScreen->height ||
 695        sarea->rotation != intelScreen->current_rotation) {
 696       intelUpdateScreenRotation(intel, sPriv, sarea);
 697
 698       /* This will drop the outstanding batchbuffer on the floor */
 699       intel->batch.ptr -= (intel->batch.size - intel->batch.space);
 700       intel->batch.space = intel->batch.size;
 701       /* lose all primitives */
 702       intel->prim.primitive = ~0;
 703       intel->prim.start_ptr = 0;
 704       intel->prim.flush = 0;
 705       intel->vtbl.lost_hardware( intel );
 706
 707       intel->lastStamp = 0; /* force window update */
 708
 709       /* Release batch buffer
 710        */
 711       intelDestroyBatchBuffer(&intel->ctx);
 712       intelInitBatchBuffer(&intel->ctx);
 713       intel->prim.flush = intel_emit_invarient_state;
 714
 715       /* Still need to reset the global LRU?
 716        */
 717       intel_driReinitTextureHeap( intel->texture_heaps[0], intel->intelScreen->tex.size );
 718    }
 719
 720    /* Shared texture managment - if another client has played with
 721     * texture space, figure out which if any of our textures have been
 722     * ejected, and update our global LRU.
 723     */
 724    for ( i = 0 ; i < intel->nr_heaps ; i++ ) {
 725       DRI_AGE_TEXTURES( intel->texture_heaps[ i ] );
 726    }
 727 }
 728
 729
 730 void intelSwapBuffers( __DRIdrawablePrivate *dPriv )
 731 {
 732    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 733       intelContextPtr intel;
 734       GLcontext *ctx;
 735       intel = (intelContextPtr) dPriv->driContextPriv->driverPrivate;
 736       ctx = &intel->ctx;
 737       if (ctx->Visual.doubleBufferMode) {
 738          intelScreenPrivate *screen = intel->intelScreen;
 739          _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
 740          if ( 0 /*intel->doPageFlip*/ ) { /* doPageFlip is never set !!! */
 741             intelPageFlip( dPriv );
 742          } else {
 743              intelCopyBuffer( dPriv, NULL );
 744          }
 745          if (screen->current_rotation != 0) {
 746             intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 747          }
 748       }
 749    } else {
 750       /* XXX this shouldn't be an error but we can't handle it for now */
 751       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 752    }
 753 }
 754
 755 void intelCopySubBuffer( __DRIdrawablePrivate *dPriv,
 756                          int x, int y, int w, int h )
 757 {
 758    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 759       intelContextPtr intel;
 760       GLcontext *ctx;
 761       intel = (intelContextPtr) dPriv->driContextPriv->driverPrivate;
 762       ctx = &intel->ctx;
 763       if (ctx->Visual.doubleBufferMode) {
 764          drm_clip_rect_t rect;
 765          rect.x1 = x + dPriv->x;
 766          rect.y1 = (dPriv->h - y - h) + dPriv->y;
 767          rect.x2 = rect.x1 + w;
 768          rect.y2 = rect.y1 + h;
 769          _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
 770          intelCopyBuffer( dPriv, &rect );
 771       }
 772    } else {
 773       /* XXX this shouldn't be an error but we can't handle it for now */
 774       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 775    }
 776 }