src/mesa/drivers/dri/i915tex/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
  42 #include "tnl/t_pipeline.h"
  43 #include "tnl/t_vertex.h"
  44
  45 #include "drivers/common/driverfuncs.h"
  46
  47 #include "intel_screen.h"
  48
  49 #include "i830_dri.h"
  50
  51 #include "intel_buffers.h"
  52 #include "intel_tex.h"
  53 #include "intel_span.h"
  54 #include "intel_tris.h"
  55 #include "intel_ioctl.h"
  56 #include "intel_batchbuffer.h"
  57 #include "intel_blit.h"
  58 #include "intel_pixel.h"
  59 #include "intel_regions.h"
  60 #include "intel_buffer_objects.h"
  61 #include "intel_fbo.h"
  62
  63 #include "drirenderbuffer.h"
  64 #include "vblank.h"
  65 #include "utils.h"
  66 #include "xmlpool.h"            /* for symbolic values of enum-type options */
  67 #ifndef INTEL_DEBUG
  68 int INTEL_DEBUG = (0);
  69 #endif
  70
  71 #define need_GL_ARB_multisample
  72 #define need_GL_ARB_point_parameters
  73 #define need_GL_ARB_texture_compression
  74 #define need_GL_ARB_vertex_buffer_object
  75 #define need_GL_ARB_vertex_program
  76 #define need_GL_ARB_window_pos
  77 #define need_GL_EXT_blend_color
  78 #define need_GL_EXT_blend_equation_separate
  79 #define need_GL_EXT_blend_func_separate
  80 #define need_GL_EXT_blend_minmax
  81 #define need_GL_EXT_cull_vertex
  82 #define need_GL_EXT_fog_coord
  83 #define need_GL_EXT_framebuffer_object
  84 #define need_GL_EXT_multi_draw_arrays
  85 #define need_GL_EXT_secondary_color
  86 #define need_GL_NV_vertex_program
  87 #include "extension_helper.h"
  88
  89
  90 #define DRIVER_DATE                     "20061102"
  91
  92 _glthread_Mutex lockMutex;
  93 static GLboolean lockMutexInit = GL_FALSE;
  94
  95
  96 static const GLubyte *
  97 intelGetString(GLcontext * ctx, GLenum name)
  98 {
  99    const char *chipset;
 100    static char buffer[128];
 101
 102    switch (name) {
 103    case GL_VENDOR:
 104       return (GLubyte *) "Tungsten Graphics, Inc";
 105       break;
 106
 107    case GL_RENDERER:
 108       switch (intel_context(ctx)->intelScreen->deviceID) {
 109       case PCI_CHIP_845_G:
 110          chipset = "Intel(R) 845G";
 111          break;
 112       case PCI_CHIP_I830_M:
 113          chipset = "Intel(R) 830M";
 114          break;
 115       case PCI_CHIP_I855_GM:
 116          chipset = "Intel(R) 852GM/855GM";
 117          break;
 118       case PCI_CHIP_I865_G:
 119          chipset = "Intel(R) 865G";
 120          break;
 121       case PCI_CHIP_I915_G:
 122          chipset = "Intel(R) 915G";
 123          break;
 124       case PCI_CHIP_I915_GM:
 125          chipset = "Intel(R) 915GM";
 126          break;
 127       case PCI_CHIP_I945_G:
 128          chipset = "Intel(R) 945G";
 129          break;
 130       case PCI_CHIP_I945_GM:
 131          chipset = "Intel(R) 945GM";
 132          break;
 133       case PCI_CHIP_I945_GME:
 134          chipset = "Intel(R) 945GME";
 135          break;
 136       case PCI_CHIP_G33_G:
 137          chipset = "Intel(R) G33";
 138          break;
 139       case PCI_CHIP_Q35_G:
 140          chipset = "Intel(R) Q35";
 141          break;
 142       case PCI_CHIP_Q33_G:
 143          chipset = "Intel(R) Q33";
 144          break;
 145       default:
 146          chipset = "Unknown Intel Chipset";
 147          break;
 148       }
 149
 150       (void) driGetRendererString(buffer, chipset, DRIVER_DATE, 0);
 151       return (GLubyte *) buffer;
 152
 153    default:
 154       return NULL;
 155    }
 156 }
 157
 158
 159 /**
 160  * Extension strings exported by the intel driver.
 161  *
 162  * \note
 163  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 164  * old i830-specific driver.
 165  */
 166 const struct dri_extension card_extensions[] = {
 167    {"GL_ARB_multisample", GL_ARB_multisample_functions},
 168    {"GL_ARB_multitexture", NULL},
 169    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
 170    {"GL_ARB_texture_border_clamp", NULL},
 171    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
 172    {"GL_ARB_texture_cube_map", NULL},
 173    {"GL_ARB_texture_env_add", NULL},
 174    {"GL_ARB_texture_env_combine", NULL},
 175    {"GL_ARB_texture_env_dot3", NULL},
 176    {"GL_ARB_texture_mirrored_repeat", NULL},
 177    {"GL_ARB_texture_rectangle", NULL},
 178    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
 179    {"GL_ARB_pixel_buffer_object", NULL},
 180    {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
 181    {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
 182    {"GL_EXT_blend_color", GL_EXT_blend_color_functions},
 183    {"GL_EXT_blend_equation_separate",
 184     GL_EXT_blend_equation_separate_functions},
 185    {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
 186    {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
 187    {"GL_EXT_blend_subtract", NULL},
 188    {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
 189    {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
 190    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 191    {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
 192 #if 1                           /* XXX FBO temporary? */
 193    {"GL_EXT_packed_depth_stencil", NULL},
 194 #endif
 195    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 196    {"GL_EXT_stencil_wrap", NULL},
 197    {"GL_EXT_texture_edge_clamp", NULL},
 198    {"GL_EXT_texture_env_combine", NULL},
 199    {"GL_EXT_texture_env_dot3", NULL},
 200    {"GL_EXT_texture_filter_anisotropic", NULL},
 201    {"GL_EXT_texture_lod_bias", NULL},
 202    {"GL_3DFX_texture_compression_FXT1", NULL},
 203    {"GL_APPLE_client_storage", NULL},
 204    {"GL_MESA_pack_invert", NULL},
 205    {"GL_MESA_ycbcr_texture", NULL},
 206    {"GL_NV_blend_square", NULL},
 207    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 208    {"GL_NV_vertex_program1_1", NULL},
 209 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 210    {NULL, NULL}
 211 };
 212
 213 extern const struct tnl_pipeline_stage _intel_render_stage;
 214
 215 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 216    &_tnl_vertex_transform_stage,
 217    &_tnl_vertex_cull_stage,
 218    &_tnl_normal_transform_stage,
 219    &_tnl_lighting_stage,
 220    &_tnl_fog_coordinate_stage,
 221    &_tnl_texgen_stage,
 222    &_tnl_texture_transform_stage,
 223    &_tnl_point_attenuation_stage,
 224    &_tnl_vertex_program_stage,
 225 #if 1
 226    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 227 #endif
 228    &_tnl_render_stage,
 229    0,
 230 };
 231
 232
 233 static const struct dri_debug_control debug_control[] = {
 234    {"tex", DEBUG_TEXTURE},
 235    {"state", DEBUG_STATE},
 236    {"ioctl", DEBUG_IOCTL},
 237    {"blit", DEBUG_BLIT},
 238    {"mip", DEBUG_MIPTREE},
 239    {"fall", DEBUG_FALLBACKS},
 240    {"verb", DEBUG_VERBOSE},
 241    {"bat", DEBUG_BATCH},
 242    {"pix", DEBUG_PIXEL},
 243    {"buf", DEBUG_BUFMGR},
 244    {"reg", DEBUG_REGION},
 245    {"fbo", DEBUG_FBO},
 246    {"lock", DEBUG_LOCK},
 247    {NULL, 0}
 248 };
 249
 250
 251 static void
 252 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 253 {
 254    _swrast_InvalidateState(ctx, new_state);
 255    _swsetup_InvalidateState(ctx, new_state);
 256    _vbo_InvalidateState(ctx, new_state);
 257    _tnl_InvalidateState(ctx, new_state);
 258    _tnl_invalidate_vertex_state(ctx, new_state);
 259    intel_context(ctx)->NewGLState |= new_state;
 260 }
 261
 262
 263 void
 264 intelFlush(GLcontext * ctx)
 265 {
 266    struct intel_context *intel = intel_context(ctx);
 267
 268    if (intel->Fallback)
 269       _swrast_flush(ctx);
 270
 271    INTEL_FIREVERTICES(intel);
 272
 273    if (intel->batch->map != intel->batch->ptr)
 274       intel_batchbuffer_flush(intel->batch);
 275
 276    /* XXX: Need to do an MI_FLUSH here.
 277     */
 278 }
 279
 280
 281 /**
 282  * Check if we need to rotate/warp the front color buffer to the
 283  * rotated screen.  We generally need to do this when we get a glFlush
 284  * or glFinish after drawing to the front color buffer.
 285  */
 286 static void
 287 intelCheckFrontRotate(GLcontext * ctx)
 288 {
 289    struct intel_context *intel = intel_context(ctx);
 290    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] ==
 291        BUFFER_BIT_FRONT_LEFT) {
 292       intelScreenPrivate *screen = intel->intelScreen;
 293       if (screen->current_rotation != 0) {
 294          __DRIdrawablePrivate *dPriv = intel->driDrawable;
 295          intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 296       }
 297    }
 298 }
 299
 300
 301 /**
 302  * Called via glFlush.
 303  */
 304 static void
 305 intelglFlush(GLcontext * ctx)
 306 {
 307    intelFlush(ctx);
 308    intelCheckFrontRotate(ctx);
 309 }
 310
 311 void
 312 intelFinish(GLcontext * ctx)
 313 {
 314    struct intel_context *intel = intel_context(ctx);
 315    intelFlush(ctx);
 316    if (intel->batch->last_fence) {
 317       driFenceFinish(intel->batch->last_fence,
 318                      0, GL_FALSE);
 319       driFenceUnReference(intel->batch->last_fence);
 320       intel->batch->last_fence = NULL;
 321    }
 322    intelCheckFrontRotate(ctx);
 323 }
 324
 325
 326 void
 327 intelInitDriverFunctions(struct dd_function_table *functions)
 328 {
 329    _mesa_init_driver_functions(functions);
 330
 331    functions->Flush = intelglFlush;
 332    functions->Finish = intelFinish;
 333    functions->GetString = intelGetString;
 334    functions->UpdateState = intelInvalidateState;
 335    functions->CopyColorTable = _swrast_CopyColorTable;
 336    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 337    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 338    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 339
 340    intelInitTextureFuncs(functions);
 341    intelInitPixelFuncs(functions);
 342    intelInitStateFuncs(functions);
 343    intelInitBufferFuncs(functions);
 344 }
 345
 346
 347 GLboolean
 348 intelInitContext(struct intel_context *intel,
 349                  const __GLcontextModes * mesaVis,
 350                  __DRIcontextPrivate * driContextPriv,
 351                  void *sharedContextPrivate,
 352                  struct dd_function_table *functions)
 353 {
 354    GLcontext *ctx = &intel->ctx;
 355    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 356    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 357    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 358    drmI830Sarea *saPriv = (drmI830Sarea *)
 359       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 360    int fthrottle_mode;
 361    GLboolean havePools;
 362
 363    DRM_LIGHT_LOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 364    havePools = intelCreatePools(intelScreen);
 365    DRM_UNLOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 366
 367    if (!havePools)
 368       return GL_FALSE;
 369
 370    if (!_mesa_initialize_context(&intel->ctx,
 371                                  mesaVis, shareCtx,
 372                                  functions, (void *) intel))
 373       return GL_FALSE;
 374
 375    driContextPriv->driverPrivate = intel;
 376    intel->intelScreen = intelScreen;
 377    intel->driScreen = sPriv;
 378    intel->sarea = saPriv;
 379
 380    intel->width = intelScreen->width;
 381    intel->height = intelScreen->height;
 382    intel->current_rotation = intelScreen->current_rotation;
 383
 384    if (!lockMutexInit) {
 385       lockMutexInit = GL_TRUE;
 386       _glthread_INIT_MUTEX(lockMutex);
 387    }
 388
 389    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 390                        intel->driScreen->myNum, "i915");
 391
 392    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 393
 394    /* This doesn't yet catch all non-conformant rendering, but it's a
 395     * start.
 396     */
 397    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 398       intel->strict_conformance = 1;
 399    }
 400
 401    ctx->Const.MinLineWidth = 1.0;
 402    ctx->Const.MinLineWidthAA = 1.0;
 403    ctx->Const.MaxLineWidth = 3.0;
 404    ctx->Const.MaxLineWidthAA = 3.0;
 405    ctx->Const.LineWidthGranularity = 1.0;
 406
 407    ctx->Const.MinPointSize = 1.0;
 408    ctx->Const.MinPointSizeAA = 1.0;
 409    ctx->Const.MaxPointSize = 255.0;
 410    ctx->Const.MaxPointSizeAA = 3.0;
 411    ctx->Const.PointSizeGranularity = 1.0;
 412
 413    /* reinitialize the context point state.
 414     * It depend on constants in __GLcontextRec::Const
 415     */
 416    _mesa_init_point(ctx);
 417
 418    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 419
 420    /* Initialize the software rasterizer and helper modules. */
 421    _swrast_CreateContext(ctx);
 422    _vbo_CreateContext(ctx);
 423    _tnl_CreateContext(ctx);
 424    _swsetup_CreateContext(ctx);
 425
 426    /* Install the customized pipeline: */
 427    _tnl_destroy_pipeline(ctx);
 428    _tnl_install_pipeline(ctx, intel_pipeline);
 429
 430    /* Configure swrast to match hardware characteristics: */
 431    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 432    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 433
 434    /* Dri stuff */
 435    intel->hHWContext = driContextPriv->hHWContext;
 436    intel->driFd = sPriv->fd;
 437    intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
 438
 439    intel->hw_stipple = 1;
 440
 441    /* XXX FBO: this doesn't seem to be used anywhere */
 442    switch (mesaVis->depthBits) {
 443    case 0:                     /* what to do in this case? */
 444    case 16:
 445       intel->polygon_offset_scale = 1.0 / 0xffff;
 446       break;
 447    case 24:
 448       intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
 449       break;
 450    default:
 451       assert(0);
 452       break;
 453    }
 454
 455    /* Initialize swrast, tnl driver tables: */
 456    intelInitSpanFuncs(ctx);
 457    intelInitTriFuncs(ctx);
 458
 459
 460    intel->RenderIndex = ~0;
 461
 462    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 463    intel->iw.irq_seq = -1;
 464    intel->irqsEmitted = 0;
 465
 466    intel->do_irqs = (intel->intelScreen->irq_active &&
 467                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 468
 469    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 470
 471    _math_matrix_ctr(&intel->ViewportMatrix);
 472
 473    /* Disable imaging extension until convolution is working in
 474     * teximage paths:
 475     */
 476    driInitExtensions(ctx, card_extensions,
 477 /*                    GL_TRUE, */
 478                      GL_FALSE);
 479
 480
 481    intel->batch = intel_batchbuffer_alloc(intel);
 482    intel->last_swap_fence = NULL;
 483    intel->first_swap_fence = NULL;
 484
 485    intel_bufferobj_init(intel);
 486    intel_fbo_init(intel);
 487
 488    if (intel->ctx.Mesa_DXTn) {
 489       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 490       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 491    }
 492    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 493       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 494    }
 495
 496    intel->prim.primitive = ~0;
 497
 498
 499 #if DO_DEBUG
 500    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 501 #endif
 502
 503    if (getenv("INTEL_NO_RAST")) {
 504       fprintf(stderr, "disabling 3D rasterization\n");
 505       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 506    }
 507
 508    return GL_TRUE;
 509 }
 510
 511 void
 512 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 513 {
 514    struct intel_context *intel =
 515       (struct intel_context *) driContextPriv->driverPrivate;
 516
 517    assert(intel);               /* should never be null */
 518    if (intel) {
 519       GLboolean release_texture_heaps;
 520
 521       INTEL_FIREVERTICES(intel);
 522
 523       intel->vtbl.destroy(intel);
 524
 525       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 526       _swsetup_DestroyContext(&intel->ctx);
 527       _tnl_DestroyContext(&intel->ctx);
 528       _vbo_DestroyContext(&intel->ctx);
 529
 530       _swrast_DestroyContext(&intel->ctx);
 531       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 532
 533       intel_batchbuffer_free(intel->batch);
 534
 535       if (intel->last_swap_fence) {
 536          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 537          driFenceUnReference(intel->last_swap_fence);
 538          intel->last_swap_fence = NULL;
 539       }
 540       if (intel->first_swap_fence) {
 541          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 542          driFenceUnReference(intel->first_swap_fence);
 543          intel->first_swap_fence = NULL;
 544       }
 545
 546
 547       if (release_texture_heaps) {
 548          /* This share group is about to go away, free our private
 549           * texture object data.
 550           */
 551          if (INTEL_DEBUG & DEBUG_TEXTURE)
 552             fprintf(stderr, "do something to free texture heaps\n");
 553       }
 554
 555       /* free the Mesa context */
 556       _mesa_free_context_data(&intel->ctx);
 557    }
 558 }
 559
 560 GLboolean
 561 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 562 {
 563    return GL_TRUE;
 564 }
 565
 566 GLboolean
 567 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 568                  __DRIdrawablePrivate * driDrawPriv,
 569                  __DRIdrawablePrivate * driReadPriv)
 570 {
 571
 572    if (driContextPriv) {
 573       struct intel_context *intel =
 574          (struct intel_context *) driContextPriv->driverPrivate;
 575       struct intel_framebuffer *intel_fb =
 576          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 577       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 578
 579
 580       /* XXX FBO temporary fix-ups! */
 581       /* if the renderbuffers don't have regions, init them from the context */
 582       {
 583          struct intel_renderbuffer *irbDepth
 584             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 585          struct intel_renderbuffer *irbStencil
 586             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 587
 588          if (intel_fb->color_rb[0] && !intel_fb->color_rb[0]->region) {
 589             intel_region_reference(&intel_fb->color_rb[0]->region,
 590                                    intel->intelScreen->front_region);
 591          }
 592          if (intel_fb->color_rb[1] && !intel_fb->color_rb[1]->region) {
 593             intel_region_reference(&intel_fb->color_rb[1]->region,
 594                                    intel->intelScreen->back_region);
 595          }
 596          if (intel_fb->color_rb[2] && !intel_fb->color_rb[2]->region) {
 597             intel_region_reference(&intel_fb->color_rb[2]->region,
 598                                    intel->intelScreen->third_region);
 599          }
 600          if (irbDepth && !irbDepth->region) {
 601             intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
 602          }
 603          if (irbStencil && !irbStencil->region) {
 604             intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
 605          }
 606       }
 607
 608       /* set GLframebuffer size to match window, if needed */
 609       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 610
 611       if (driReadPriv != driDrawPriv) {
 612          driUpdateFramebufferSize(&intel->ctx, driReadPriv);
 613       }
 614
 615       _mesa_make_current(&intel->ctx, &intel_fb->Base, readFb);
 616
 617       /* The drawbuffer won't always be updated by _mesa_make_current:
 618        */
 619       if (intel->ctx.DrawBuffer == &intel_fb->Base) {
 620
 621          if (intel->driDrawable != driDrawPriv) {
 622             if (driDrawPriv->pdraw->swap_interval == (unsigned)-1) {
 623                int i;
 624
 625                intel_fb->vblank_flags = (intel->intelScreen->irq_active != 0)
 626                   ? driGetDefaultVBlankFlags(&intel->optionCache)
 627                  : VBLANK_FLAG_NO_IRQ;
 628
 629                (*dri_interface->getUST) (&intel_fb->swap_ust);
 630                driDrawableInitVBlank(driDrawPriv, intel_fb->vblank_flags,
 631                                      &intel_fb->vbl_seq);
 632                intel_fb->vbl_waited = intel_fb->vbl_seq;
 633
 634                for (i = 0; i < (intel->intelScreen->third.handle ? 3 : 2); i++) {
 635                   if (intel_fb->color_rb[i])
 636                      intel_fb->color_rb[i]->vbl_pending = intel_fb->vbl_seq;
 637                }
 638             }
 639             intel->driDrawable = driDrawPriv;
 640             intelWindowMoved(intel);
 641          }
 642
 643          intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 644       }
 645    }
 646    else {
 647       _mesa_make_current(NULL, NULL, NULL);
 648    }
 649
 650    return GL_TRUE;
 651 }
 652
 653 static void
 654 intelContendedLock(struct intel_context *intel, GLuint flags)
 655 {
 656    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 657    __DRIscreenPrivate *sPriv = intel->driScreen;
 658    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 659    drmI830Sarea *sarea = intel->sarea;
 660
 661    drmGetLock(intel->driFd, intel->hHWContext, flags);
 662
 663    if (INTEL_DEBUG & DEBUG_LOCK)
 664       _mesa_printf("%s - got contended lock\n", __progname);
 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 (sarea->width != intelScreen->width ||
 675        sarea->height != intelScreen->height ||
 676        sarea->rotation != intelScreen->current_rotation) {
 677
 678       intelUpdateScreenRotation(sPriv, sarea);
 679    }
 680
 681    if (sarea->width != intel->width ||
 682        sarea->height != intel->height ||
 683        sarea->rotation != intel->current_rotation) {
 684       int numClipRects = intel->numClipRects;
 685
 686       /*
 687        * FIXME: Really only need to do this when drawing to a
 688        * common back- or front buffer.
 689        */
 690
 691       /*
 692        * This will essentially drop the outstanding batchbuffer on the floor.
 693        */
 694       intel->numClipRects = 0;
 695
 696       if (intel->Fallback)
 697          _swrast_flush(&intel->ctx);
 698
 699       INTEL_FIREVERTICES(intel);
 700
 701       if (intel->batch->map != intel->batch->ptr)
 702          intel_batchbuffer_flush(intel->batch);
 703
 704       intel->numClipRects = numClipRects;
 705
 706       /* force window update */
 707       intel->lastStamp = 0;
 708
 709       intel->width = sarea->width;
 710       intel->height = sarea->height;
 711       intel->current_rotation = sarea->rotation;
 712    }
 713
 714    /* Drawable changed?
 715     */
 716    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 717       intelWindowMoved(intel);
 718       intel->lastStamp = dPriv->lastStamp;
 719    }
 720 }
 721
 722
 723
 724 /* Lock the hardware and validate our state.
 725  */
 726 void LOCK_HARDWARE( struct intel_context *intel )
 727 {
 728     char __ret=0;
 729     struct intel_framebuffer *intel_fb = NULL;
 730     struct intel_renderbuffer *intel_rb = NULL;
 731     _glthread_LOCK_MUTEX(lockMutex);
 732     assert(!intel->locked);
 733
 734     if (intel->driDrawable) {
 735        intel_fb = intel->driDrawable->driverPrivate;
 736
 737        if (intel_fb)
 738           intel_rb =
 739              intel_get_renderbuffer(&intel_fb->Base,
 740                                     intel_fb->Base._ColorDrawBufferMask[0] ==
 741                                     BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 742                                     BUFFER_BACK_LEFT);
 743     }
 744
 745     if (intel_rb && intel_fb->vblank_flags &&
 746         !(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) &&
 747         (intel_fb->vbl_waited - intel_rb->vbl_pending) > (1<<23)) {
 748         drmVBlank vbl;
 749
 750         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 751
 752         if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 753             vbl.request.type |= DRM_VBLANK_SECONDARY;
 754         }
 755
 756         vbl.request.sequence = intel_rb->vbl_pending;
 757         drmWaitVBlank(intel->driFd, &vbl);
 758         intel_fb->vbl_waited = vbl.reply.sequence;
 759     }
 760
 761     DRM_CAS(intel->driHwLock, intel->hHWContext,
 762         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 763
 764     if (__ret)
 765         intelContendedLock( intel, 0 );
 766
 767     if (INTEL_DEBUG & DEBUG_LOCK)
 768       _mesa_printf("%s - locked\n", __progname);
 769
 770     intel->locked = 1;
 771 }
 772
 773
 774   /* Unlock the hardware using the global current context
 775    */
 776 void UNLOCK_HARDWARE( struct intel_context *intel )
 777 {
 778    intel->locked = 0;
 779
 780    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 781
 782    _glthread_UNLOCK_MUTEX(lockMutex);
 783
 784    if (INTEL_DEBUG & DEBUG_LOCK)
 785       _mesa_printf("%s - unlocked\n", __progname);
 786 }
 787