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
  37 #include "swrast/swrast.h"
  38 #include "swrast_setup/swrast_setup.h"
  39 #include "tnl/tnl.h"
  40
  41 #include "tnl/t_pipeline.h"
  42 #include "tnl/t_vertex.h"
  43
  44 #include "drivers/common/driverfuncs.h"
  45
  46 #include "intel_screen.h"
  47
  48 #include "i830_dri.h"
  49
  50 #include "intel_buffers.h"
  51 #include "intel_tex.h"
  52 #include "intel_span.h"
  53 #include "intel_tris.h"
  54 #include "intel_ioctl.h"
  55 #include "intel_batchbuffer.h"
  56 #include "intel_blit.h"
  57 #include "intel_pixel.h"
  58 #include "intel_regions.h"
  59 #include "intel_buffer_objects.h"
  60 #include "intel_fbo.h"
  61
  62 #include "vblank.h"
  63 #include "utils.h"
  64 #include "xmlpool.h"            /* for symbolic values of enum-type options */
  65 #ifndef INTEL_DEBUG
  66 int INTEL_DEBUG = (0);
  67 #endif
  68
  69 #define need_GL_ARB_multisample
  70 #define need_GL_ARB_point_parameters
  71 #define need_GL_ARB_texture_compression
  72 #define need_GL_ARB_vertex_buffer_object
  73 #define need_GL_ARB_vertex_program
  74 #define need_GL_ARB_window_pos
  75 #define need_GL_EXT_blend_color
  76 #define need_GL_EXT_blend_equation_separate
  77 #define need_GL_EXT_blend_func_separate
  78 #define need_GL_EXT_blend_minmax
  79 #define need_GL_EXT_cull_vertex
  80 #define need_GL_EXT_fog_coord
  81 #define need_GL_EXT_framebuffer_object
  82 #define need_GL_EXT_multi_draw_arrays
  83 #define need_GL_EXT_secondary_color
  84 #define need_GL_NV_vertex_program
  85 #include "extension_helper.h"
  86
  87
  88 #define DRIVER_DATE                     "20061102"
  89
  90 _glthread_Mutex lockMutex;
  91 static GLboolean lockMutexInit = GL_FALSE;
  92
  93
  94 static const GLubyte *
  95 intelGetString(GLcontext * ctx, GLenum name)
  96 {
  97    const char *chipset;
  98    static char buffer[128];
  99
 100    switch (name) {
 101    case GL_VENDOR:
 102       return (GLubyte *) "Tungsten Graphics, Inc";
 103       break;
 104
 105    case GL_RENDERER:
 106       switch (intel_context(ctx)->intelScreen->deviceID) {
 107       case PCI_CHIP_845_G:
 108          chipset = "Intel(R) 845G";
 109          break;
 110       case PCI_CHIP_I830_M:
 111          chipset = "Intel(R) 830M";
 112          break;
 113       case PCI_CHIP_I855_GM:
 114          chipset = "Intel(R) 852GM/855GM";
 115          break;
 116       case PCI_CHIP_I865_G:
 117          chipset = "Intel(R) 865G";
 118          break;
 119       case PCI_CHIP_I915_G:
 120          chipset = "Intel(R) 915G";
 121          break;
 122       case PCI_CHIP_I915_GM:
 123          chipset = "Intel(R) 915GM";
 124          break;
 125       case PCI_CHIP_I945_G:
 126          chipset = "Intel(R) 945G";
 127          break;
 128       case PCI_CHIP_I945_GM:
 129          chipset = "Intel(R) 945GM";
 130          break;
 131       default:
 132          chipset = "Unknown Intel Chipset";
 133          break;
 134       }
 135
 136       (void) driGetRendererString(buffer, chipset, DRIVER_DATE, 0);
 137       return (GLubyte *) buffer;
 138
 139    default:
 140       return NULL;
 141    }
 142 }
 143
 144
 145 /**
 146  * Extension strings exported by the intel driver.
 147  *
 148  * \note
 149  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 150  * old i830-specific driver.
 151  */
 152 const struct dri_extension card_extensions[] = {
 153    {"GL_ARB_multisample", GL_ARB_multisample_functions},
 154    {"GL_ARB_multitexture", NULL},
 155    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
 156    {"GL_ARB_texture_border_clamp", NULL},
 157    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
 158    {"GL_ARB_texture_cube_map", NULL},
 159    {"GL_ARB_texture_env_add", NULL},
 160    {"GL_ARB_texture_env_combine", NULL},
 161    {"GL_ARB_texture_env_dot3", NULL},
 162    {"GL_ARB_texture_mirrored_repeat", NULL},
 163    {"GL_ARB_texture_rectangle", NULL},
 164    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
 165    {"GL_ARB_pixel_buffer_object", NULL},
 166    {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
 167    {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
 168    {"GL_EXT_blend_color", GL_EXT_blend_color_functions},
 169    {"GL_EXT_blend_equation_separate",
 170     GL_EXT_blend_equation_separate_functions},
 171    {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
 172    {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
 173    {"GL_EXT_blend_subtract", NULL},
 174    {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
 175    {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
 176    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 177    {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
 178 #if 1                           /* XXX FBO temporary? */
 179    {"GL_EXT_packed_depth_stencil", NULL},
 180 #endif
 181    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 182    {"GL_EXT_stencil_wrap", NULL},
 183    {"GL_EXT_texture_edge_clamp", NULL},
 184    {"GL_EXT_texture_env_combine", NULL},
 185    {"GL_EXT_texture_env_dot3", NULL},
 186    {"GL_EXT_texture_filter_anisotropic", NULL},
 187    {"GL_EXT_texture_lod_bias", NULL},
 188    {"GL_3DFX_texture_compression_FXT1", NULL},
 189    {"GL_APPLE_client_storage", NULL},
 190    {"GL_MESA_pack_invert", NULL},
 191    {"GL_MESA_ycbcr_texture", NULL},
 192    {"GL_NV_blend_square", NULL},
 193    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 194    {"GL_NV_vertex_program1_1", NULL},
 195 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 196    {NULL, NULL}
 197 };
 198
 199 extern const struct tnl_pipeline_stage _intel_render_stage;
 200
 201 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 202    &_tnl_vertex_transform_stage,
 203    &_tnl_vertex_cull_stage,
 204    &_tnl_normal_transform_stage,
 205    &_tnl_lighting_stage,
 206    &_tnl_fog_coordinate_stage,
 207    &_tnl_texgen_stage,
 208    &_tnl_texture_transform_stage,
 209    &_tnl_point_attenuation_stage,
 210    &_tnl_arb_vertex_program_stage,
 211    &_tnl_vertex_program_stage,
 212 #if 1
 213    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 214 #endif
 215    &_tnl_render_stage,
 216    0,
 217 };
 218
 219
 220 static const struct dri_debug_control debug_control[] = {
 221    {"tex", DEBUG_TEXTURE},
 222    {"state", DEBUG_STATE},
 223    {"ioctl", DEBUG_IOCTL},
 224    {"blit", DEBUG_BLIT},
 225    {"mip", DEBUG_MIPTREE},
 226    {"fall", DEBUG_FALLBACKS},
 227    {"verb", DEBUG_VERBOSE},
 228    {"bat", DEBUG_BATCH},
 229    {"pix", DEBUG_PIXEL},
 230    {"buf", DEBUG_BUFMGR},
 231    {"reg", DEBUG_REGION},
 232    {"fbo", DEBUG_FBO},
 233    {"lock", DEBUG_LOCK},
 234    {NULL, 0}
 235 };
 236
 237
 238 static void
 239 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 240 {
 241    _swrast_InvalidateState(ctx, new_state);
 242    _swsetup_InvalidateState(ctx, new_state);
 243    _vbo_InvalidateState(ctx, new_state);
 244    _tnl_InvalidateState(ctx, new_state);
 245    _tnl_invalidate_vertex_state(ctx, new_state);
 246    intel_context(ctx)->NewGLState |= new_state;
 247 }
 248
 249
 250 void
 251 intelFlush(GLcontext * ctx)
 252 {
 253    struct intel_context *intel = intel_context(ctx);
 254
 255    if (intel->Fallback)
 256       _swrast_flush(ctx);
 257
 258    INTEL_FIREVERTICES(intel);
 259
 260    if (intel->batch->map != intel->batch->ptr)
 261       intel_batchbuffer_flush(intel->batch);
 262
 263    /* XXX: Need to do an MI_FLUSH here.
 264     */
 265 }
 266
 267
 268 /**
 269  * Check if we need to rotate/warp the front color buffer to the
 270  * rotated screen.  We generally need to do this when we get a glFlush
 271  * or glFinish after drawing to the front color buffer.
 272  */
 273 static void
 274 intelCheckFrontRotate(GLcontext * ctx)
 275 {
 276    struct intel_context *intel = intel_context(ctx);
 277    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] ==
 278        BUFFER_BIT_FRONT_LEFT) {
 279       intelScreenPrivate *screen = intel->intelScreen;
 280       if (screen->current_rotation != 0) {
 281          __DRIdrawablePrivate *dPriv = intel->driDrawable;
 282          intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 283       }
 284    }
 285 }
 286
 287
 288 /**
 289  * Called via glFlush.
 290  */
 291 static void
 292 intelglFlush(GLcontext * ctx)
 293 {
 294    intelFlush(ctx);
 295    intelCheckFrontRotate(ctx);
 296 }
 297
 298 void
 299 intelFinish(GLcontext * ctx)
 300 {
 301    struct intel_context *intel = intel_context(ctx);
 302    intelFlush(ctx);
 303    if (intel->batch->last_fence) {
 304       driFenceFinish(intel->batch->last_fence,
 305                      0, GL_FALSE);
 306       driFenceUnReference(intel->batch->last_fence);
 307       intel->batch->last_fence = NULL;
 308    }
 309    intelCheckFrontRotate(ctx);
 310 }
 311
 312
 313 void
 314 intelInitDriverFunctions(struct dd_function_table *functions)
 315 {
 316    _mesa_init_driver_functions(functions);
 317
 318    functions->Flush = intelglFlush;
 319    functions->Finish = intelFinish;
 320    functions->GetString = intelGetString;
 321    functions->UpdateState = intelInvalidateState;
 322    functions->CopyColorTable = _swrast_CopyColorTable;
 323    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 324    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 325    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 326
 327    intelInitTextureFuncs(functions);
 328    intelInitPixelFuncs(functions);
 329    intelInitStateFuncs(functions);
 330    intelInitBufferFuncs(functions);
 331 }
 332
 333
 334 GLboolean
 335 intelInitContext(struct intel_context *intel,
 336                  const __GLcontextModes * mesaVis,
 337                  __DRIcontextPrivate * driContextPriv,
 338                  void *sharedContextPrivate,
 339                  struct dd_function_table *functions)
 340 {
 341    GLcontext *ctx = &intel->ctx;
 342    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 343    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 344    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 345    drmI830Sarea *saPriv = (drmI830Sarea *)
 346       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 347    int fthrottle_mode;
 348
 349    if (!_mesa_initialize_context(&intel->ctx,
 350                                  mesaVis, shareCtx,
 351                                  functions, (void *) intel))
 352       return GL_FALSE;
 353
 354    driContextPriv->driverPrivate = intel;
 355    intel->intelScreen = intelScreen;
 356    intel->driScreen = sPriv;
 357    intel->sarea = saPriv;
 358
 359    if (!lockMutexInit) {
 360       lockMutexInit = GL_TRUE;
 361       _glthread_INIT_MUTEX(lockMutex);
 362    }
 363
 364    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 365                        intel->driScreen->myNum, "i915");
 366
 367    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 368
 369    /* This doesn't yet catch all non-conformant rendering, but it's a
 370     * start.
 371     */
 372    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 373       intel->strict_conformance = 1;
 374    }
 375
 376    ctx->Const.MinLineWidth = 1.0;
 377    ctx->Const.MinLineWidthAA = 1.0;
 378    ctx->Const.MaxLineWidth = 3.0;
 379    ctx->Const.MaxLineWidthAA = 3.0;
 380    ctx->Const.LineWidthGranularity = 1.0;
 381
 382    ctx->Const.MinPointSize = 1.0;
 383    ctx->Const.MinPointSizeAA = 1.0;
 384    ctx->Const.MaxPointSize = 255.0;
 385    ctx->Const.MaxPointSizeAA = 3.0;
 386    ctx->Const.PointSizeGranularity = 1.0;
 387
 388    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 389
 390    /* Initialize the software rasterizer and helper modules. */
 391    _swrast_CreateContext(ctx);
 392    _vbo_CreateContext(ctx);
 393    _tnl_CreateContext(ctx);
 394    _swsetup_CreateContext(ctx);
 395
 396    /* Install the customized pipeline: */
 397    _tnl_destroy_pipeline(ctx);
 398    _tnl_install_pipeline(ctx, intel_pipeline);
 399
 400    /* Configure swrast to match hardware characteristics: */
 401    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 402    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 403
 404    /* Dri stuff */
 405    intel->hHWContext = driContextPriv->hHWContext;
 406    intel->driFd = sPriv->fd;
 407    intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
 408
 409    intel->hw_stipple = 1;
 410
 411    /* XXX FBO: this doesn't seem to be used anywhere */
 412    switch (mesaVis->depthBits) {
 413    case 0:                     /* what to do in this case? */
 414    case 16:
 415       intel->polygon_offset_scale = 1.0 / 0xffff;
 416       break;
 417    case 24:
 418       intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
 419       break;
 420    default:
 421       assert(0);
 422       break;
 423    }
 424
 425    /* Initialize swrast, tnl driver tables: */
 426    intelInitSpanFuncs(ctx);
 427    intelInitTriFuncs(ctx);
 428
 429
 430    intel->RenderIndex = ~0;
 431
 432    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 433    intel->iw.irq_seq = -1;
 434    intel->irqsEmitted = 0;
 435
 436    intel->do_irqs = (intel->intelScreen->irq_active &&
 437                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 438
 439    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 440
 441    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 442       ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 443
 444    (*dri_interface->getUST) (&intel->swap_ust);
 445    _math_matrix_ctr(&intel->ViewportMatrix);
 446
 447    /* Disable imaging extension until convolution is working in
 448     * teximage paths:
 449     */
 450    driInitExtensions(ctx, card_extensions,
 451 /*                    GL_TRUE, */
 452                      GL_FALSE);
 453
 454
 455    intel->batch = intel_batchbuffer_alloc(intel);
 456    intel->last_swap_fence = NULL;
 457    intel->first_swap_fence = NULL;
 458
 459    intel_bufferobj_init(intel);
 460    intel_fbo_init(intel);
 461
 462    if (intel->ctx.Mesa_DXTn) {
 463       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 464       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 465    }
 466    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 467       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 468    }
 469
 470    intel->prim.primitive = ~0;
 471
 472
 473 #if DO_DEBUG
 474    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 475 #endif
 476
 477    if (getenv("INTEL_NO_RAST")) {
 478       fprintf(stderr, "disabling 3D rasterization\n");
 479       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 480    }
 481
 482    return GL_TRUE;
 483 }
 484
 485 void
 486 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 487 {
 488    struct intel_context *intel =
 489       (struct intel_context *) driContextPriv->driverPrivate;
 490
 491    assert(intel);               /* should never be null */
 492    if (intel) {
 493       GLboolean release_texture_heaps;
 494
 495       INTEL_FIREVERTICES(intel);
 496
 497       intel->vtbl.destroy(intel);
 498
 499       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 500       _swsetup_DestroyContext(&intel->ctx);
 501       _tnl_DestroyContext(&intel->ctx);
 502       _vbo_DestroyContext(&intel->ctx);
 503
 504       _swrast_DestroyContext(&intel->ctx);
 505       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 506
 507       intel_batchbuffer_free(intel->batch);
 508
 509       if (intel->last_swap_fence) {
 510          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 511          driFenceUnReference(intel->last_swap_fence);
 512          intel->last_swap_fence = NULL;
 513       }
 514       if (intel->first_swap_fence) {
 515          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 516          driFenceUnReference(intel->first_swap_fence);
 517          intel->first_swap_fence = NULL;
 518       }
 519
 520
 521       if (release_texture_heaps) {
 522          /* This share group is about to go away, free our private
 523           * texture object data.
 524           */
 525          if (INTEL_DEBUG & DEBUG_TEXTURE)
 526             fprintf(stderr, "do something to free texture heaps\n");
 527       }
 528
 529       /* free the Mesa context */
 530       _mesa_free_context_data(&intel->ctx);
 531    }
 532 }
 533
 534 GLboolean
 535 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 536 {
 537    return GL_TRUE;
 538 }
 539
 540 GLboolean
 541 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 542                  __DRIdrawablePrivate * driDrawPriv,
 543                  __DRIdrawablePrivate * driReadPriv)
 544 {
 545
 546    if (driContextPriv) {
 547       struct intel_context *intel =
 548          (struct intel_context *) driContextPriv->driverPrivate;
 549       GLframebuffer *drawFb = (GLframebuffer *) driDrawPriv->driverPrivate;
 550       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 551
 552
 553       /* XXX FBO temporary fix-ups! */
 554       /* if the renderbuffers don't have regions, init them from the context */
 555       {
 556          struct intel_renderbuffer *irbFront
 557             = intel_get_renderbuffer(drawFb, BUFFER_FRONT_LEFT);
 558          struct intel_renderbuffer *irbBack
 559             = intel_get_renderbuffer(drawFb, BUFFER_BACK_LEFT);
 560          struct intel_renderbuffer *irbDepth
 561             = intel_get_renderbuffer(drawFb, BUFFER_DEPTH);
 562          struct intel_renderbuffer *irbStencil
 563             = intel_get_renderbuffer(drawFb, BUFFER_STENCIL);
 564
 565          if (irbFront && !irbFront->region) {
 566             intel_region_reference(&irbFront->region, intel->intelScreen->front_region);
 567          }
 568          if (irbBack && !irbBack->region) {
 569             intel_region_reference(&irbBack->region, intel->intelScreen->back_region);
 570          }
 571          if (irbDepth && !irbDepth->region) {
 572             intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
 573          }
 574          if (irbStencil && !irbStencil->region) {
 575             intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
 576          }
 577       }
 578
 579       /* set initial GLframebuffer size to match window, if needed */
 580       if (drawFb->Width == 0 && driDrawPriv->w) {
 581          _mesa_resize_framebuffer(&intel->ctx, drawFb,
 582                                   driDrawPriv->w, driDrawPriv->h);
 583       }
 584       if (readFb->Width == 0 && driReadPriv->w) {
 585          _mesa_resize_framebuffer(&intel->ctx, readFb,
 586                                   driReadPriv->w, driReadPriv->h);
 587       }
 588
 589       _mesa_make_current(&intel->ctx, drawFb, readFb);
 590
 591       /* The drawbuffer won't always be updated by _mesa_make_current:
 592        */
 593       if (intel->ctx.DrawBuffer == drawFb) {
 594
 595          if (intel->driDrawable != driDrawPriv) {
 596             driDrawableInitVBlank(driDrawPriv, intel->vblank_flags, &intel->vbl_seq);
 597             intel->driDrawable = driDrawPriv;
 598             intelWindowMoved(intel);
 599          }
 600
 601          intel_draw_buffer(&intel->ctx, drawFb);
 602       }
 603    }
 604    else {
 605       _mesa_make_current(NULL, NULL, NULL);
 606    }
 607
 608    return GL_TRUE;
 609 }
 610
 611 static void
 612 intelContendedLock(struct intel_context *intel, GLuint flags)
 613 {
 614    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 615    __DRIscreenPrivate *sPriv = intel->driScreen;
 616    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 617    drmI830Sarea *sarea = intel->sarea;
 618
 619    drmGetLock(intel->driFd, intel->hHWContext, flags);
 620
 621    if (INTEL_DEBUG & DEBUG_LOCK)
 622       _mesa_printf("%s - got contended lock\n", __progname);
 623
 624    /* If the window moved, may need to set a new cliprect now.
 625     *
 626     * NOTE: This releases and regains the hw lock, so all state
 627     * checking must be done *after* this call:
 628     */
 629    if (dPriv)
 630       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 631
 632    if (sarea->width != intelScreen->width ||
 633        sarea->height != intelScreen->height ||
 634        sarea->rotation != intelScreen->current_rotation) {
 635
 636       intelUpdateScreenRotation(sPriv, sarea);
 637
 638       /*
 639        * This will drop the outstanding batchbuffer on the floor
 640        * FIXME: This should be done for all contexts?
 641        */
 642
 643       intel_batchbuffer_reset(intel->batch);
 644
 645       /* lose all primitives */
 646       intel->prim.primitive = ~0;
 647       intel->prim.start_ptr = 0;
 648       intel->prim.flush = 0;
 649
 650       /* re-emit all state */
 651       intel->vtbl.lost_hardware(intel);
 652
 653       /* force window update */
 654       intel->lastStamp = 0;
 655    }
 656
 657
 658    /* Drawable changed?
 659     */
 660    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 661       intelWindowMoved(intel);
 662       intel->lastStamp = dPriv->lastStamp;
 663    }
 664 }
 665
 666
 667 /* Lock the hardware and validate our state.
 668  */
 669 void LOCK_HARDWARE( struct intel_context *intel )
 670 {
 671     char __ret=0;
 672
 673     _glthread_LOCK_MUTEX(lockMutex);
 674     assert(!intel->locked);
 675
 676     if (intel->swap_scheduled) {
 677         drmVBlank vbl;
 678         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 679         if ( intel->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 680             vbl.request.type |= DRM_VBLANK_SECONDARY;
 681         }
 682         vbl.request.sequence = intel->vbl_seq;
 683         drmWaitVBlank(intel->driFd, &vbl);
 684         intel->swap_scheduled = 0;
 685     }
 686
 687     DRM_CAS(intel->driHwLock, intel->hHWContext,
 688         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 689
 690     if (__ret)
 691         intelContendedLock( intel, 0 );
 692
 693     if (INTEL_DEBUG & DEBUG_LOCK)
 694       _mesa_printf("%s - locked\n", __progname);
 695
 696     intel->locked = 1;
 697 }
 698
 699
 700   /* Unlock the hardware using the global current context
 701    */
 702 void UNLOCK_HARDWARE( struct intel_context *intel )
 703 {
 704    intel->locked = 0;
 705
 706    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 707
 708    _glthread_UNLOCK_MUTEX(lockMutex);
 709
 710    if (INTEL_DEBUG & DEBUG_LOCK)
 711       _mesa_printf("%s - unlocked\n", __progname);
 712 }
 713