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_pixel_buffer_object", NULL},
 196    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 197    {"GL_EXT_stencil_wrap", NULL},
 198    {"GL_EXT_texture_edge_clamp", NULL},
 199    {"GL_EXT_texture_env_combine", NULL},
 200    {"GL_EXT_texture_env_dot3", NULL},
 201    {"GL_EXT_texture_filter_anisotropic", NULL},
 202    {"GL_EXT_texture_lod_bias", NULL},
 203    {"GL_3DFX_texture_compression_FXT1", NULL},
 204    {"GL_APPLE_client_storage", NULL},
 205    {"GL_MESA_pack_invert", NULL},
 206    {"GL_MESA_ycbcr_texture", NULL},
 207    {"GL_NV_blend_square", NULL},
 208    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 209    {"GL_NV_vertex_program1_1", NULL},
 210 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 211    {NULL, NULL}
 212 };
 213
 214 extern const struct tnl_pipeline_stage _intel_render_stage;
 215
 216 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 217    &_tnl_vertex_transform_stage,
 218    &_tnl_vertex_cull_stage,
 219    &_tnl_normal_transform_stage,
 220    &_tnl_lighting_stage,
 221    &_tnl_fog_coordinate_stage,
 222    &_tnl_texgen_stage,
 223    &_tnl_texture_transform_stage,
 224    &_tnl_point_attenuation_stage,
 225    &_tnl_vertex_program_stage,
 226 #if 1
 227    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 228 #endif
 229    &_tnl_render_stage,
 230    0,
 231 };
 232
 233
 234 static const struct dri_debug_control debug_control[] = {
 235    {"tex", DEBUG_TEXTURE},
 236    {"state", DEBUG_STATE},
 237    {"ioctl", DEBUG_IOCTL},
 238    {"blit", DEBUG_BLIT},
 239    {"mip", DEBUG_MIPTREE},
 240    {"fall", DEBUG_FALLBACKS},
 241    {"verb", DEBUG_VERBOSE},
 242    {"bat", DEBUG_BATCH},
 243    {"pix", DEBUG_PIXEL},
 244    {"buf", DEBUG_BUFMGR},
 245    {"reg", DEBUG_REGION},
 246    {"fbo", DEBUG_FBO},
 247    {"lock", DEBUG_LOCK},
 248    {NULL, 0}
 249 };
 250
 251
 252 static void
 253 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 254 {
 255    _swrast_InvalidateState(ctx, new_state);
 256    _swsetup_InvalidateState(ctx, new_state);
 257    _vbo_InvalidateState(ctx, new_state);
 258    _tnl_InvalidateState(ctx, new_state);
 259    _tnl_invalidate_vertex_state(ctx, new_state);
 260    intel_context(ctx)->NewGLState |= new_state;
 261 }
 262
 263
 264 void
 265 intelFlush(GLcontext * ctx)
 266 {
 267    struct intel_context *intel = intel_context(ctx);
 268
 269    if (intel->Fallback)
 270       _swrast_flush(ctx);
 271
 272    INTEL_FIREVERTICES(intel);
 273
 274    if (intel->batch->map != intel->batch->ptr)
 275       intel_batchbuffer_flush(intel->batch);
 276
 277    /* XXX: Need to do an MI_FLUSH here.
 278     */
 279 }
 280
 281
 282 /**
 283  * Check if we need to rotate/warp the front color buffer to the
 284  * rotated screen.  We generally need to do this when we get a glFlush
 285  * or glFinish after drawing to the front color buffer.
 286  * If no rotation, just copy the private fake front buffer to the real one.
 287  */
 288 static void
 289 intelCheckFrontUpdate(GLcontext * ctx)
 290 {
 291    struct intel_context *intel = intel_context(ctx);
 292    /* can't use _ColorDrawBufferMask as its value
 293       might change if a different drawable is bound! */
 294    if (ctx->Color.DrawBuffer[0] == GL_FRONT_LEFT) {
 295       intelScreenPrivate *screen = intel->intelScreen;
 296       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 297       if (screen->current_rotation != 0) {
 298          intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 299       }
 300       else {
 301          intelCopyBuffer(dPriv, NULL);
 302       }
 303    }
 304 }
 305
 306
 307 /**
 308  * Called via glFlush.
 309  */
 310 static void
 311 intelglFlush(GLcontext * ctx)
 312 {
 313    intelFlush(ctx);
 314    intelCheckFrontUpdate(ctx);
 315 }
 316
 317 void
 318 intelFinish(GLcontext * ctx)
 319 {
 320    struct intel_context *intel = intel_context(ctx);
 321    intelFlush(ctx);
 322    if (intel->batch->last_fence) {
 323       driFenceFinish(intel->batch->last_fence,
 324                      0, GL_FALSE);
 325       driFenceUnReference(intel->batch->last_fence);
 326       intel->batch->last_fence = NULL;
 327    }
 328    intelCheckFrontUpdate(ctx);
 329 }
 330
 331
 332 void
 333 intelInitDriverFunctions(struct dd_function_table *functions)
 334 {
 335    _mesa_init_driver_functions(functions);
 336
 337    functions->Flush = intelglFlush;
 338    functions->Finish = intelFinish;
 339    functions->GetString = intelGetString;
 340    functions->UpdateState = intelInvalidateState;
 341    functions->CopyColorTable = _swrast_CopyColorTable;
 342    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 343    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 344    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 345
 346    intelInitTextureFuncs(functions);
 347    intelInitPixelFuncs(functions);
 348    intelInitStateFuncs(functions);
 349    intelInitBufferFuncs(functions);
 350 }
 351
 352
 353 GLboolean
 354 intelInitContext(struct intel_context *intel,
 355                  const __GLcontextModes * mesaVis,
 356                  __DRIcontextPrivate * driContextPriv,
 357                  void *sharedContextPrivate,
 358                  struct dd_function_table *functions)
 359 {
 360    GLcontext *ctx = &intel->ctx;
 361    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 362    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 363    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 364    drmI830Sarea *saPriv = (drmI830Sarea *)
 365       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 366    int fthrottle_mode;
 367    GLboolean havePools;
 368
 369    DRM_LIGHT_LOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 370    havePools = intelCreatePools(intelScreen);
 371    DRM_UNLOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 372
 373    if (!havePools)
 374       return GL_FALSE;
 375
 376    if (!_mesa_initialize_context(&intel->ctx,
 377                                  mesaVis, shareCtx,
 378                                  functions, (void *) intel))
 379       return GL_FALSE;
 380
 381    driContextPriv->driverPrivate = intel;
 382    intel->intelScreen = intelScreen;
 383    intel->driScreen = sPriv;
 384    intel->sarea = saPriv;
 385
 386    intel->width = intelScreen->width;
 387    intel->height = intelScreen->height;
 388    intel->current_rotation = intelScreen->current_rotation;
 389
 390    if (!lockMutexInit) {
 391       lockMutexInit = GL_TRUE;
 392       _glthread_INIT_MUTEX(lockMutex);
 393    }
 394
 395    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 396                        intel->driScreen->myNum, "i915");
 397
 398    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 399
 400    /* This doesn't yet catch all non-conformant rendering, but it's a
 401     * start.
 402     */
 403    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 404       intel->strict_conformance = 1;
 405    }
 406
 407    ctx->Const.MinLineWidth = 1.0;
 408    ctx->Const.MinLineWidthAA = 1.0;
 409    ctx->Const.MaxLineWidth = 3.0;
 410    ctx->Const.MaxLineWidthAA = 3.0;
 411    ctx->Const.LineWidthGranularity = 1.0;
 412
 413    ctx->Const.MinPointSize = 1.0;
 414    ctx->Const.MinPointSizeAA = 1.0;
 415    ctx->Const.MaxPointSize = 255.0;
 416    ctx->Const.MaxPointSizeAA = 3.0;
 417    ctx->Const.PointSizeGranularity = 1.0;
 418
 419    /* reinitialize the context point state.
 420     * It depend on constants in __GLcontextRec::Const
 421     */
 422    _mesa_init_point(ctx);
 423
 424    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 425
 426    /* Initialize the software rasterizer and helper modules. */
 427    _swrast_CreateContext(ctx);
 428    _vbo_CreateContext(ctx);
 429    _tnl_CreateContext(ctx);
 430    _swsetup_CreateContext(ctx);
 431
 432    /* Install the customized pipeline: */
 433    _tnl_destroy_pipeline(ctx);
 434    _tnl_install_pipeline(ctx, intel_pipeline);
 435
 436    /* Configure swrast to match hardware characteristics: */
 437    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 438    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 439
 440    /* Dri stuff */
 441    intel->hHWContext = driContextPriv->hHWContext;
 442    intel->driFd = sPriv->fd;
 443    intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
 444
 445    intel->hw_stipple = 1;
 446
 447    /* XXX FBO: this doesn't seem to be used anywhere */
 448    switch (mesaVis->depthBits) {
 449    case 0:                     /* what to do in this case? */
 450    case 16:
 451       intel->polygon_offset_scale = 1.0 / 0xffff;
 452       break;
 453    case 24:
 454       intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
 455       break;
 456    default:
 457       assert(0);
 458       break;
 459    }
 460
 461    /* Initialize swrast, tnl driver tables: */
 462    intelInitSpanFuncs(ctx);
 463    intelInitTriFuncs(ctx);
 464
 465
 466    intel->RenderIndex = ~0;
 467
 468    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 469    intel->iw.irq_seq = -1;
 470    intel->irqsEmitted = 0;
 471
 472    intel->do_irqs = (intel->intelScreen->irq_active &&
 473                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 474
 475    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 476
 477    _math_matrix_ctr(&intel->ViewportMatrix);
 478
 479    /* Disable imaging extension until convolution is working in
 480     * teximage paths:
 481     */
 482    driInitExtensions(ctx, card_extensions,
 483 /*                    GL_TRUE, */
 484                      GL_FALSE);
 485
 486
 487    intel->batch = intel_batchbuffer_alloc(intel);
 488    intel->last_swap_fence = NULL;
 489    intel->first_swap_fence = NULL;
 490
 491    intel_bufferobj_init(intel);
 492    intel_fbo_init(intel);
 493
 494    if (intel->ctx.Mesa_DXTn) {
 495       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 496       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 497    }
 498    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 499       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 500    }
 501
 502    intel->prim.primitive = ~0;
 503
 504
 505 #if DO_DEBUG
 506    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 507 #endif
 508
 509    if (getenv("INTEL_NO_RAST")) {
 510       fprintf(stderr, "disabling 3D rasterization\n");
 511       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 512    }
 513
 514    return GL_TRUE;
 515 }
 516
 517 void
 518 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 519 {
 520    struct intel_context *intel =
 521       (struct intel_context *) driContextPriv->driverPrivate;
 522
 523    assert(intel);               /* should never be null */
 524    if (intel) {
 525       GLboolean release_texture_heaps;
 526
 527       INTEL_FIREVERTICES(intel);
 528
 529       intel->vtbl.destroy(intel);
 530
 531       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 532       _swsetup_DestroyContext(&intel->ctx);
 533       _tnl_DestroyContext(&intel->ctx);
 534       _vbo_DestroyContext(&intel->ctx);
 535
 536       _swrast_DestroyContext(&intel->ctx);
 537       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 538
 539       intel_batchbuffer_free(intel->batch);
 540
 541       if (intel->last_swap_fence) {
 542          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 543          driFenceUnReference(intel->last_swap_fence);
 544          intel->last_swap_fence = NULL;
 545       }
 546       if (intel->first_swap_fence) {
 547          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 548          driFenceUnReference(intel->first_swap_fence);
 549          intel->first_swap_fence = NULL;
 550       }
 551
 552
 553       if (release_texture_heaps) {
 554          /* This share group is about to go away, free our private
 555           * texture object data.
 556           */
 557          if (INTEL_DEBUG & DEBUG_TEXTURE)
 558             fprintf(stderr, "do something to free texture heaps\n");
 559       }
 560
 561       /* free the Mesa context */
 562       _mesa_free_context_data(&intel->ctx);
 563    }
 564 }
 565
 566 GLboolean
 567 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 568 {
 569    return GL_TRUE;
 570 }
 571
 572 GLboolean
 573 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 574                  __DRIdrawablePrivate * driDrawPriv,
 575                  __DRIdrawablePrivate * driReadPriv)
 576 {
 577
 578 #if 0
 579    if (driDrawPriv) {
 580       fprintf(stderr, "x %d, y %d, width %d, height %d\n",
 581               driDrawPriv->x, driDrawPriv->y, driDrawPriv->w, driDrawPriv->h);
 582    }
 583 #endif
 584
 585    if (driContextPriv) {
 586       struct intel_context *intel =
 587          (struct intel_context *) driContextPriv->driverPrivate;
 588       struct intel_framebuffer *intel_fb =
 589          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 590       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 591
 592       /* this is a hack so we have a valid context when the region allocation
 593          is done. Need a per-screen context? */
 594       intel->intelScreen->dummyctxptr = intel;
 595
 596       /* XXX FBO temporary fix-ups! */
 597       /* if the renderbuffers don't have regions, init them from the context */
 598       {
 599          struct intel_renderbuffer *irbDepth
 600             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 601          struct intel_renderbuffer *irbStencil
 602             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 603
 604          if (intel_fb->color_rb[0] && !intel_fb->color_rb[0]->region) {
 605             intel_region_reference(&intel_fb->color_rb[0]->region,
 606                                    intel->intelScreen->front_region);
 607          }
 608          if (intel_fb->color_rb[1] && !intel_fb->color_rb[1]->region) {
 609             intel_region_reference(&intel_fb->color_rb[1]->region,
 610                                    intel->intelScreen->back_region);
 611          }
 612          if (intel_fb->color_rb[2] && !intel_fb->color_rb[2]->region) {
 613             intel_region_reference(&intel_fb->color_rb[2]->region,
 614                                    intel->intelScreen->third_region);
 615          }
 616          if (irbDepth && !irbDepth->region) {
 617             intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
 618          }
 619          if (irbStencil && !irbStencil->region) {
 620             intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
 621          }
 622       }
 623
 624       /* update GLframebuffer size to match window if needed */
 625       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 626
 627       if (driReadPriv != driDrawPriv) {
 628          driUpdateFramebufferSize(&intel->ctx, driReadPriv);
 629       }
 630
 631       _mesa_make_current(&intel->ctx, &intel_fb->Base, readFb);
 632
 633       /* The drawbuffer won't always be updated by _mesa_make_current:
 634        */
 635       if (intel->ctx.DrawBuffer == &intel_fb->Base) {
 636
 637          if (intel->driDrawable != driDrawPriv) {
 638             intel_fb->vblank_flags = (intel->intelScreen->irq_active != 0)
 639                ? driGetDefaultVBlankFlags(&intel->optionCache)
 640                : VBLANK_FLAG_NO_IRQ;
 641             (*dri_interface->getUST) (&intel_fb->swap_ust);
 642             driDrawableInitVBlank(driDrawPriv, intel_fb->vblank_flags,
 643                                   &intel_fb->vbl_seq);
 644             intel->driDrawable = driDrawPriv;
 645             intelWindowMoved(intel);
 646             intel->lastStamp = driDrawPriv->lastStamp;
 647          }
 648          else if (intel->lastStamp != driDrawPriv->lastStamp) {
 649             intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 650          }
 651       }
 652    }
 653    else {
 654       _mesa_make_current(NULL, NULL, NULL);
 655    }
 656
 657    return GL_TRUE;
 658 }
 659
 660 static void
 661 intelContendedLock(struct intel_context *intel, GLuint flags)
 662 {
 663    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 664    __DRIscreenPrivate *sPriv = intel->driScreen;
 665    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 666    drmI830Sarea *sarea = intel->sarea;
 667
 668    drmGetLock(intel->driFd, intel->hHWContext, flags);
 669
 670    if (INTEL_DEBUG & DEBUG_LOCK)
 671       _mesa_printf("%s - got contended lock\n", __progname);
 672
 673    /* If the window moved, may need to set a new cliprect now.
 674     *
 675     * NOTE: This releases and regains the hw lock, so all state
 676     * checking must be done *after* this call:
 677     */
 678    if (dPriv)
 679       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 680
 681    if (sarea->width != intelScreen->width ||
 682        sarea->height != intelScreen->height ||
 683        sarea->rotation != intelScreen->current_rotation) {
 684
 685       intelUpdateScreenRotation(sPriv, sarea);
 686    }
 687
 688 #if 0
 689    if (sarea->width != intel->width ||
 690        sarea->height != intel->height ||
 691        sarea->rotation != intel->current_rotation) {
 692
 693       void *batchMap = intel->batch->map;
 694
 695       /*
 696        * FIXME: Really only need to do this when drawing to a
 697        * common back- or front buffer.
 698        */
 699
 700       /*
 701        * This will drop the outstanding batchbuffer on the floor
 702        */
 703
 704       if (batchMap != NULL) {
 705          driBOUnmap(intel->batch->buffer);
 706          intel->batch->map = NULL;
 707       }
 708
 709       intel_batchbuffer_reset(intel->batch);
 710
 711       if (batchMap == NULL) {
 712          driBOUnmap(intel->batch->buffer);
 713          intel->batch->map = NULL;
 714       }
 715
 716       /* lose all primitives */
 717       intel->prim.primitive = ~0;
 718       intel->prim.start_ptr = 0;
 719       intel->prim.flush = 0;
 720
 721       /* re-emit all state */
 722       intel->vtbl.lost_hardware(intel);
 723
 724       /* force window update */
 725       intel->lastStamp = 0;
 726
 727       intel->width = sarea->width;
 728       intel->height = sarea->height;
 729       intel->current_rotation = sarea->rotation;
 730    }
 731 #endif
 732 }
 733
 734
 735
 736 /* Lock the hardware and validate our state.
 737  */
 738 void LOCK_HARDWARE( struct intel_context *intel )
 739 {
 740     char __ret=0;
 741     struct intel_framebuffer *intel_fb = NULL;
 742     struct intel_renderbuffer *intel_rb = NULL;
 743     _glthread_LOCK_MUTEX(lockMutex);
 744     assert(!intel->locked);
 745
 746     if (intel->driDrawable) {
 747        intel_fb = intel->driDrawable->driverPrivate;
 748
 749        if (intel_fb)
 750           intel_rb =
 751              intel_get_renderbuffer(&intel_fb->Base,
 752                                     intel_fb->Base._ColorDrawBufferMask[0] ==
 753                                     BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 754                                     BUFFER_BACK_LEFT);
 755     }
 756
 757     if (intel_rb && (intel_fb->vbl_waited - intel_rb->vbl_pending) > (1<<23)) {
 758         drmVBlank vbl;
 759
 760         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 761
 762         if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 763             vbl.request.type |= DRM_VBLANK_SECONDARY;
 764         }
 765
 766         vbl.request.sequence = intel_rb->vbl_pending;
 767         drmWaitVBlank(intel->driFd, &vbl);
 768         intel_fb->vbl_waited = vbl.reply.sequence;
 769     }
 770
 771     DRM_CAS(intel->driHwLock, intel->hHWContext,
 772         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 773
 774     if (__ret)
 775         intelContendedLock( intel, 0 );
 776
 777     if (INTEL_DEBUG & DEBUG_LOCK)
 778       _mesa_printf("%s - locked\n", __progname);
 779
 780     intel->locked = 1;
 781 }
 782
 783
 784   /* Unlock the hardware using the global current context
 785    */
 786 void UNLOCK_HARDWARE( struct intel_context *intel )
 787 {
 788    intel->locked = 0;
 789
 790    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 791
 792    _glthread_UNLOCK_MUTEX(lockMutex);
 793
 794    if (INTEL_DEBUG & DEBUG_LOCK)
 795       _mesa_printf("%s - unlocked\n", __progname);
 796 }
 797