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       default:
 134          chipset = "Unknown Intel Chipset";
 135          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    {"GL_ARB_multisample", GL_ARB_multisample_functions},
 156    {"GL_ARB_multitexture", NULL},
 157    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
 158    {"GL_ARB_texture_border_clamp", NULL},
 159    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
 160    {"GL_ARB_texture_cube_map", NULL},
 161    {"GL_ARB_texture_env_add", NULL},
 162    {"GL_ARB_texture_env_combine", NULL},
 163    {"GL_ARB_texture_env_dot3", NULL},
 164    {"GL_ARB_texture_mirrored_repeat", NULL},
 165    {"GL_ARB_texture_rectangle", NULL},
 166    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
 167    {"GL_ARB_pixel_buffer_object", NULL},
 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",
 172     GL_EXT_blend_equation_separate_functions},
 173    {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
 174    {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
 175    {"GL_EXT_blend_subtract", NULL},
 176    {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
 177    {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
 178    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 179    {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
 180 #if 1                           /* XXX FBO temporary? */
 181    {"GL_EXT_packed_depth_stencil", NULL},
 182 #endif
 183    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 184    {"GL_EXT_stencil_wrap", NULL},
 185    {"GL_EXT_texture_edge_clamp", NULL},
 186    {"GL_EXT_texture_env_combine", NULL},
 187    {"GL_EXT_texture_env_dot3", NULL},
 188    {"GL_EXT_texture_filter_anisotropic", NULL},
 189    {"GL_EXT_texture_lod_bias", NULL},
 190    {"GL_3DFX_texture_compression_FXT1", NULL},
 191    {"GL_APPLE_client_storage", NULL},
 192    {"GL_MESA_pack_invert", NULL},
 193    {"GL_MESA_ycbcr_texture", NULL},
 194    {"GL_NV_blend_square", NULL},
 195    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 196    {"GL_NV_vertex_program1_1", NULL},
 197 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 198    {NULL, NULL}
 199 };
 200
 201 extern const struct tnl_pipeline_stage _intel_render_stage;
 202
 203 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 204    &_tnl_vertex_transform_stage,
 205    &_tnl_vertex_cull_stage,
 206    &_tnl_normal_transform_stage,
 207    &_tnl_lighting_stage,
 208    &_tnl_fog_coordinate_stage,
 209    &_tnl_texgen_stage,
 210    &_tnl_texture_transform_stage,
 211    &_tnl_point_attenuation_stage,
 212    &_tnl_vertex_program_stage,
 213 #if 1
 214    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 215 #endif
 216    &_tnl_render_stage,
 217    0,
 218 };
 219
 220
 221 static const struct dri_debug_control debug_control[] = {
 222    {"tex", DEBUG_TEXTURE},
 223    {"state", DEBUG_STATE},
 224    {"ioctl", DEBUG_IOCTL},
 225    {"blit", DEBUG_BLIT},
 226    {"mip", DEBUG_MIPTREE},
 227    {"fall", DEBUG_FALLBACKS},
 228    {"verb", DEBUG_VERBOSE},
 229    {"bat", DEBUG_BATCH},
 230    {"pix", DEBUG_PIXEL},
 231    {"buf", DEBUG_BUFMGR},
 232    {"reg", DEBUG_REGION},
 233    {"fbo", DEBUG_FBO},
 234    {"lock", DEBUG_LOCK},
 235    {NULL, 0}
 236 };
 237
 238
 239 static void
 240 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 241 {
 242    _swrast_InvalidateState(ctx, new_state);
 243    _swsetup_InvalidateState(ctx, new_state);
 244    _vbo_InvalidateState(ctx, new_state);
 245    _tnl_InvalidateState(ctx, new_state);
 246    _tnl_invalidate_vertex_state(ctx, new_state);
 247    intel_context(ctx)->NewGLState |= new_state;
 248 }
 249
 250
 251 void
 252 intelFlush(GLcontext * ctx)
 253 {
 254    struct intel_context *intel = intel_context(ctx);
 255
 256    if (intel->Fallback)
 257       _swrast_flush(ctx);
 258
 259    INTEL_FIREVERTICES(intel);
 260
 261    if (intel->batch->map != intel->batch->ptr)
 262       intel_batchbuffer_flush(intel->batch);
 263
 264    /* XXX: Need to do an MI_FLUSH here.
 265     */
 266 }
 267
 268
 269 /**
 270  * Check if we need to rotate/warp the front color buffer to the
 271  * rotated screen.  We generally need to do this when we get a glFlush
 272  * or glFinish after drawing to the front color buffer.
 273  */
 274 static void
 275 intelCheckFrontRotate(GLcontext * ctx)
 276 {
 277    struct intel_context *intel = intel_context(ctx);
 278    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] ==
 279        BUFFER_BIT_FRONT_LEFT) {
 280       intelScreenPrivate *screen = intel->intelScreen;
 281       if (screen->current_rotation != 0) {
 282          __DRIdrawablePrivate *dPriv = intel->driDrawable;
 283          intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 284       }
 285    }
 286 }
 287
 288
 289 /**
 290  * Called via glFlush.
 291  */
 292 static void
 293 intelglFlush(GLcontext * ctx)
 294 {
 295    intelFlush(ctx);
 296    intelCheckFrontRotate(ctx);
 297 }
 298
 299 void
 300 intelFinish(GLcontext * ctx)
 301 {
 302    struct intel_context *intel = intel_context(ctx);
 303    intelFlush(ctx);
 304    if (intel->batch->last_fence) {
 305       driFenceFinish(intel->batch->last_fence,
 306                      0, GL_FALSE);
 307       driFenceUnReference(intel->batch->last_fence);
 308       intel->batch->last_fence = NULL;
 309    }
 310    intelCheckFrontRotate(ctx);
 311 }
 312
 313
 314 void
 315 intelInitDriverFunctions(struct dd_function_table *functions)
 316 {
 317    _mesa_init_driver_functions(functions);
 318
 319    functions->Flush = intelglFlush;
 320    functions->Finish = intelFinish;
 321    functions->GetString = intelGetString;
 322    functions->UpdateState = intelInvalidateState;
 323    functions->CopyColorTable = _swrast_CopyColorTable;
 324    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 325    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 326    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 327
 328    intelInitTextureFuncs(functions);
 329    intelInitPixelFuncs(functions);
 330    intelInitStateFuncs(functions);
 331    intelInitBufferFuncs(functions);
 332 }
 333
 334
 335 GLboolean
 336 intelInitContext(struct intel_context *intel,
 337                  const __GLcontextModes * mesaVis,
 338                  __DRIcontextPrivate * driContextPriv,
 339                  void *sharedContextPrivate,
 340                  struct dd_function_table *functions)
 341 {
 342    GLcontext *ctx = &intel->ctx;
 343    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 344    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 345    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 346    drmI830Sarea *saPriv = (drmI830Sarea *)
 347       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 348    int fthrottle_mode;
 349
 350    if (!_mesa_initialize_context(&intel->ctx,
 351                                  mesaVis, shareCtx,
 352                                  functions, (void *) intel))
 353       return GL_FALSE;
 354
 355    driContextPriv->driverPrivate = intel;
 356    intel->intelScreen = intelScreen;
 357    intel->driScreen = sPriv;
 358    intel->sarea = saPriv;
 359
 360    intel->width = intelScreen->width;
 361    intel->height = intelScreen->height;
 362    intel->current_rotation = intelScreen->current_rotation;
 363
 364    if (!lockMutexInit) {
 365       lockMutexInit = GL_TRUE;
 366       _glthread_INIT_MUTEX(lockMutex);
 367    }
 368
 369    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 370                        intel->driScreen->myNum, "i915");
 371
 372    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 373
 374    /* This doesn't yet catch all non-conformant rendering, but it's a
 375     * start.
 376     */
 377    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 378       intel->strict_conformance = 1;
 379    }
 380
 381    ctx->Const.MinLineWidth = 1.0;
 382    ctx->Const.MinLineWidthAA = 1.0;
 383    ctx->Const.MaxLineWidth = 3.0;
 384    ctx->Const.MaxLineWidthAA = 3.0;
 385    ctx->Const.LineWidthGranularity = 1.0;
 386
 387    ctx->Const.MinPointSize = 1.0;
 388    ctx->Const.MinPointSizeAA = 1.0;
 389    ctx->Const.MaxPointSize = 255.0;
 390    ctx->Const.MaxPointSizeAA = 3.0;
 391    ctx->Const.PointSizeGranularity = 1.0;
 392
 393    /* reinitialize the context point state.
 394     * It depend on constants in __GLcontextRec::Const
 395     */
 396    _mesa_init_point(ctx);
 397
 398    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 399
 400    /* Initialize the software rasterizer and helper modules. */
 401    _swrast_CreateContext(ctx);
 402    _vbo_CreateContext(ctx);
 403    _tnl_CreateContext(ctx);
 404    _swsetup_CreateContext(ctx);
 405
 406    /* Install the customized pipeline: */
 407    _tnl_destroy_pipeline(ctx);
 408    _tnl_install_pipeline(ctx, intel_pipeline);
 409
 410    /* Configure swrast to match hardware characteristics: */
 411    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 412    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 413
 414    /* Dri stuff */
 415    intel->hHWContext = driContextPriv->hHWContext;
 416    intel->driFd = sPriv->fd;
 417    intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
 418
 419    intel->hw_stipple = 1;
 420
 421    /* XXX FBO: this doesn't seem to be used anywhere */
 422    switch (mesaVis->depthBits) {
 423    case 0:                     /* what to do in this case? */
 424    case 16:
 425       intel->polygon_offset_scale = 1.0 / 0xffff;
 426       break;
 427    case 24:
 428       intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
 429       break;
 430    default:
 431       assert(0);
 432       break;
 433    }
 434
 435    /* Initialize swrast, tnl driver tables: */
 436    intelInitSpanFuncs(ctx);
 437    intelInitTriFuncs(ctx);
 438
 439
 440    intel->RenderIndex = ~0;
 441
 442    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 443    intel->iw.irq_seq = -1;
 444    intel->irqsEmitted = 0;
 445
 446    intel->do_irqs = (intel->intelScreen->irq_active &&
 447                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 448
 449    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 450
 451    _math_matrix_ctr(&intel->ViewportMatrix);
 452
 453    /* Disable imaging extension until convolution is working in
 454     * teximage paths:
 455     */
 456    driInitExtensions(ctx, card_extensions,
 457 /*                    GL_TRUE, */
 458                      GL_FALSE);
 459
 460
 461    intel->batch = intel_batchbuffer_alloc(intel);
 462    intel->last_swap_fence = NULL;
 463    intel->first_swap_fence = NULL;
 464
 465    intel_bufferobj_init(intel);
 466    intel_fbo_init(intel);
 467
 468    if (intel->ctx.Mesa_DXTn) {
 469       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 470       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 471    }
 472    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 473       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 474    }
 475
 476    intel->prim.primitive = ~0;
 477
 478
 479 #if DO_DEBUG
 480    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 481 #endif
 482
 483    if (getenv("INTEL_NO_RAST")) {
 484       fprintf(stderr, "disabling 3D rasterization\n");
 485       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 486    }
 487
 488    return GL_TRUE;
 489 }
 490
 491 void
 492 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 493 {
 494    struct intel_context *intel =
 495       (struct intel_context *) driContextPriv->driverPrivate;
 496
 497    assert(intel);               /* should never be null */
 498    if (intel) {
 499       GLboolean release_texture_heaps;
 500
 501       INTEL_FIREVERTICES(intel);
 502
 503       intel->vtbl.destroy(intel);
 504
 505       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 506       _swsetup_DestroyContext(&intel->ctx);
 507       _tnl_DestroyContext(&intel->ctx);
 508       _vbo_DestroyContext(&intel->ctx);
 509
 510       _swrast_DestroyContext(&intel->ctx);
 511       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 512
 513       intel_batchbuffer_free(intel->batch);
 514
 515       if (intel->last_swap_fence) {
 516          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 517          driFenceUnReference(intel->last_swap_fence);
 518          intel->last_swap_fence = NULL;
 519       }
 520       if (intel->first_swap_fence) {
 521          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 522          driFenceUnReference(intel->first_swap_fence);
 523          intel->first_swap_fence = NULL;
 524       }
 525
 526
 527       if (release_texture_heaps) {
 528          /* This share group is about to go away, free our private
 529           * texture object data.
 530           */
 531          if (INTEL_DEBUG & DEBUG_TEXTURE)
 532             fprintf(stderr, "do something to free texture heaps\n");
 533       }
 534
 535       /* free the Mesa context */
 536       _mesa_free_context_data(&intel->ctx);
 537    }
 538 }
 539
 540 GLboolean
 541 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 542 {
 543    return GL_TRUE;
 544 }
 545
 546 GLboolean
 547 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 548                  __DRIdrawablePrivate * driDrawPriv,
 549                  __DRIdrawablePrivate * driReadPriv)
 550 {
 551
 552    if (driContextPriv) {
 553       struct intel_context *intel =
 554          (struct intel_context *) driContextPriv->driverPrivate;
 555       struct intel_framebuffer *intel_fb =
 556          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 557       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 558
 559
 560       /* XXX FBO temporary fix-ups! */
 561       /* if the renderbuffers don't have regions, init them from the context */
 562       {
 563          struct intel_renderbuffer *irbDepth
 564             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_DEPTH);
 565          struct intel_renderbuffer *irbStencil
 566             = intel_get_renderbuffer(&intel_fb->Base, BUFFER_STENCIL);
 567
 568          if (intel_fb->color_rb[0] && !intel_fb->color_rb[0]->region) {
 569             intel_region_reference(&intel_fb->color_rb[0]->region,
 570                                    intel->intelScreen->front_region);
 571          }
 572          if (intel_fb->color_rb[1] && !intel_fb->color_rb[1]->region) {
 573             intel_region_reference(&intel_fb->color_rb[1]->region,
 574                                    intel->intelScreen->back_region);
 575          }
 576          if (intel_fb->color_rb[2] && !intel_fb->color_rb[2]->region) {
 577             intel_region_reference(&intel_fb->color_rb[2]->region,
 578                                    intel->intelScreen->third_region);
 579          }
 580          if (irbDepth && !irbDepth->region) {
 581             intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
 582          }
 583          if (irbStencil && !irbStencil->region) {
 584             intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
 585          }
 586       }
 587
 588       /* set GLframebuffer size to match window, if needed */
 589       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 590
 591       if (driReadPriv != driDrawPriv) {
 592          driUpdateFramebufferSize(&intel->ctx, driReadPriv);
 593       }
 594
 595       _mesa_make_current(&intel->ctx, &intel_fb->Base, readFb);
 596
 597       /* The drawbuffer won't always be updated by _mesa_make_current:
 598        */
 599       if (intel->ctx.DrawBuffer == &intel_fb->Base) {
 600
 601          if (intel->driDrawable != driDrawPriv) {
 602             intel_fb->vblank_flags = (intel->intelScreen->irq_active != 0)
 603                ? driGetDefaultVBlankFlags(&intel->optionCache)
 604                : VBLANK_FLAG_NO_IRQ;
 605             (*dri_interface->getUST) (&intel_fb->swap_ust);
 606             driDrawableInitVBlank(driDrawPriv, intel_fb->vblank_flags,
 607                                   &intel_fb->vbl_seq);
 608             intel->driDrawable = driDrawPriv;
 609             intelWindowMoved(intel);
 610          }
 611
 612          intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 613       }
 614    }
 615    else {
 616       _mesa_make_current(NULL, NULL, NULL);
 617    }
 618
 619    return GL_TRUE;
 620 }
 621
 622 static void
 623 intelContendedLock(struct intel_context *intel, GLuint flags)
 624 {
 625    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 626    __DRIscreenPrivate *sPriv = intel->driScreen;
 627    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 628    drmI830Sarea *sarea = intel->sarea;
 629
 630    drmGetLock(intel->driFd, intel->hHWContext, flags);
 631
 632    if (INTEL_DEBUG & DEBUG_LOCK)
 633       _mesa_printf("%s - got contended lock\n", __progname);
 634
 635    /* If the window moved, may need to set a new cliprect now.
 636     *
 637     * NOTE: This releases and regains the hw lock, so all state
 638     * checking must be done *after* this call:
 639     */
 640    if (dPriv)
 641       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 642
 643    if (sarea->width != intelScreen->width ||
 644        sarea->height != intelScreen->height ||
 645        sarea->rotation != intelScreen->current_rotation) {
 646
 647       intelUpdateScreenRotation(sPriv, sarea);
 648    }
 649
 650    if (sarea->width != intel->width ||
 651        sarea->height != intel->height ||
 652        sarea->rotation != intel->current_rotation) {
 653
 654       void *batchMap = intel->batch->map;
 655
 656       /*
 657        * FIXME: Really only need to do this when drawing to a
 658        * common back- or front buffer.
 659        */
 660
 661       /*
 662        * This will drop the outstanding batchbuffer on the floor
 663        */
 664
 665       if (batchMap != NULL) {
 666          driBOUnmap(intel->batch->buffer);
 667          intel->batch->map = NULL;
 668       }
 669
 670       intel_batchbuffer_reset(intel->batch);
 671
 672       if (batchMap == NULL) {
 673          driBOUnmap(intel->batch->buffer);
 674          intel->batch->map = NULL;
 675       }
 676
 677       /* lose all primitives */
 678       intel->prim.primitive = ~0;
 679       intel->prim.start_ptr = 0;
 680       intel->prim.flush = 0;
 681
 682       /* re-emit all state */
 683       intel->vtbl.lost_hardware(intel);
 684
 685       /* force window update */
 686       intel->lastStamp = 0;
 687
 688       intel->width = sarea->width;
 689       intel->height = sarea->height;
 690       intel->current_rotation = sarea->rotation;
 691    }
 692
 693    /* Drawable changed?
 694     */
 695    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 696       intelWindowMoved(intel);
 697       intel->lastStamp = dPriv->lastStamp;
 698    }
 699 }
 700
 701
 702
 703 /* Lock the hardware and validate our state.
 704  */
 705 void LOCK_HARDWARE( struct intel_context *intel )
 706 {
 707     char __ret=0;
 708     struct intel_framebuffer *intel_fb = NULL;
 709     struct intel_renderbuffer *intel_rb = NULL;
 710     _glthread_LOCK_MUTEX(lockMutex);
 711     assert(!intel->locked);
 712
 713     if (intel->driDrawable) {
 714        intel_fb = intel->driDrawable->driverPrivate;
 715
 716        if (intel_fb)
 717           intel_rb =
 718              intel_get_renderbuffer(&intel_fb->Base,
 719                                     intel_fb->Base._ColorDrawBufferMask[0] ==
 720                                     BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 721                                     BUFFER_BACK_LEFT);
 722     }
 723
 724     if (intel_rb && (intel_fb->vbl_waited - intel_rb->vbl_pending) > (1<<23)) {
 725         drmVBlank vbl;
 726
 727         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 728
 729         if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 730             vbl.request.type |= DRM_VBLANK_SECONDARY;
 731         }
 732
 733         vbl.request.sequence = intel_rb->vbl_pending;
 734         drmWaitVBlank(intel->driFd, &vbl);
 735         intel_fb->vbl_waited = vbl.reply.sequence;
 736     }
 737
 738     DRM_CAS(intel->driHwLock, intel->hHWContext,
 739         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 740
 741     if (__ret)
 742         intelContendedLock( intel, 0 );
 743
 744     if (INTEL_DEBUG & DEBUG_LOCK)
 745       _mesa_printf("%s - locked\n", __progname);
 746
 747     intel->locked = 1;
 748 }
 749
 750
 751   /* Unlock the hardware using the global current context
 752    */
 753 void UNLOCK_HARDWARE( struct intel_context *intel )
 754 {
 755    intel->locked = 0;
 756
 757    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 758
 759    _glthread_UNLOCK_MUTEX(lockMutex);
 760
 761    if (INTEL_DEBUG & DEBUG_LOCK)
 762       _mesa_printf("%s - unlocked\n", __progname);
 763 }
 764