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 "drirenderbuffer.h"
  63 #include "vblank.h"
  64 #include "utils.h"
  65 #include "xmlpool.h"            /* for symbolic values of enum-type options */
  66 #ifndef INTEL_DEBUG
  67 int INTEL_DEBUG = (0);
  68 #endif
  69
  70 #define need_GL_ARB_multisample
  71 #define need_GL_ARB_point_parameters
  72 #define need_GL_ARB_texture_compression
  73 #define need_GL_ARB_vertex_buffer_object
  74 #define need_GL_ARB_vertex_program
  75 #define need_GL_ARB_window_pos
  76 #define need_GL_EXT_blend_color
  77 #define need_GL_EXT_blend_equation_separate
  78 #define need_GL_EXT_blend_func_separate
  79 #define need_GL_EXT_blend_minmax
  80 #define need_GL_EXT_cull_vertex
  81 #define need_GL_EXT_fog_coord
  82 #define need_GL_EXT_framebuffer_object
  83 #define need_GL_EXT_multi_draw_arrays
  84 #define need_GL_EXT_secondary_color
  85 #define need_GL_NV_vertex_program
  86 #include "extension_helper.h"
  87
  88
  89 #define DRIVER_DATE                     "20061102"
  90
  91 _glthread_Mutex lockMutex;
  92 static GLboolean lockMutexInit = GL_FALSE;
  93
  94
  95 static const GLubyte *
  96 intelGetString(GLcontext * ctx, GLenum name)
  97 {
  98    const char *chipset;
  99    static char buffer[128];
 100
 101    switch (name) {
 102    case GL_VENDOR:
 103       return (GLubyte *) "Tungsten Graphics, Inc";
 104       break;
 105
 106    case GL_RENDERER:
 107       switch (intel_context(ctx)->intelScreen->deviceID) {
 108       case PCI_CHIP_845_G:
 109          chipset = "Intel(R) 845G";
 110          break;
 111       case PCI_CHIP_I830_M:
 112          chipset = "Intel(R) 830M";
 113          break;
 114       case PCI_CHIP_I855_GM:
 115          chipset = "Intel(R) 852GM/855GM";
 116          break;
 117       case PCI_CHIP_I865_G:
 118          chipset = "Intel(R) 865G";
 119          break;
 120       case PCI_CHIP_I915_G:
 121          chipset = "Intel(R) 915G";
 122          break;
 123       case PCI_CHIP_I915_GM:
 124          chipset = "Intel(R) 915GM";
 125          break;
 126       case PCI_CHIP_I945_G:
 127          chipset = "Intel(R) 945G";
 128          break;
 129       case PCI_CHIP_I945_GM:
 130          chipset = "Intel(R) 945GM";
 131          break;
 132       default:
 133          chipset = "Unknown Intel Chipset";
 134          break;
 135       }
 136
 137       (void) driGetRendererString(buffer, chipset, DRIVER_DATE, 0);
 138       return (GLubyte *) buffer;
 139
 140    default:
 141       return NULL;
 142    }
 143 }
 144
 145
 146 /**
 147  * Extension strings exported by the intel driver.
 148  *
 149  * \note
 150  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 151  * old i830-specific driver.
 152  */
 153 const struct dri_extension card_extensions[] = {
 154    {"GL_ARB_multisample", GL_ARB_multisample_functions},
 155    {"GL_ARB_multitexture", NULL},
 156    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
 157    {"GL_ARB_texture_border_clamp", NULL},
 158    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
 159    {"GL_ARB_texture_cube_map", NULL},
 160    {"GL_ARB_texture_env_add", NULL},
 161    {"GL_ARB_texture_env_combine", NULL},
 162    {"GL_ARB_texture_env_dot3", NULL},
 163    {"GL_ARB_texture_mirrored_repeat", NULL},
 164    {"GL_ARB_texture_rectangle", NULL},
 165    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
 166    {"GL_ARB_pixel_buffer_object", NULL},
 167    {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
 168    {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
 169    {"GL_EXT_blend_color", GL_EXT_blend_color_functions},
 170    {"GL_EXT_blend_equation_separate",
 171     GL_EXT_blend_equation_separate_functions},
 172    {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
 173    {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
 174    {"GL_EXT_blend_subtract", NULL},
 175    {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
 176    {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
 177    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 178    {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
 179 #if 1                           /* XXX FBO temporary? */
 180    {"GL_EXT_packed_depth_stencil", NULL},
 181 #endif
 182    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 183    {"GL_EXT_stencil_wrap", NULL},
 184    {"GL_EXT_texture_edge_clamp", NULL},
 185    {"GL_EXT_texture_env_combine", NULL},
 186    {"GL_EXT_texture_env_dot3", NULL},
 187    {"GL_EXT_texture_filter_anisotropic", NULL},
 188    {"GL_EXT_texture_lod_bias", NULL},
 189    {"GL_3DFX_texture_compression_FXT1", NULL},
 190    {"GL_APPLE_client_storage", NULL},
 191    {"GL_MESA_pack_invert", NULL},
 192    {"GL_MESA_ycbcr_texture", NULL},
 193    {"GL_NV_blend_square", NULL},
 194    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 195    {"GL_NV_vertex_program1_1", NULL},
 196 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 197    {NULL, NULL}
 198 };
 199
 200 extern const struct tnl_pipeline_stage _intel_render_stage;
 201
 202 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 203    &_tnl_vertex_transform_stage,
 204    &_tnl_vertex_cull_stage,
 205    &_tnl_normal_transform_stage,
 206    &_tnl_lighting_stage,
 207    &_tnl_fog_coordinate_stage,
 208    &_tnl_texgen_stage,
 209    &_tnl_texture_transform_stage,
 210    &_tnl_point_attenuation_stage,
 211    &_tnl_arb_vertex_program_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    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 394
 395    /* Initialize the software rasterizer and helper modules. */
 396    _swrast_CreateContext(ctx);
 397    _vbo_CreateContext(ctx);
 398    _tnl_CreateContext(ctx);
 399    _swsetup_CreateContext(ctx);
 400
 401    /* Install the customized pipeline: */
 402    _tnl_destroy_pipeline(ctx);
 403    _tnl_install_pipeline(ctx, intel_pipeline);
 404
 405    /* Configure swrast to match hardware characteristics: */
 406    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 407    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 408
 409    /* Dri stuff */
 410    intel->hHWContext = driContextPriv->hHWContext;
 411    intel->driFd = sPriv->fd;
 412    intel->driHwLock = (drmLock *) & sPriv->pSAREA->lock;
 413
 414    intel->hw_stipple = 1;
 415
 416    /* XXX FBO: this doesn't seem to be used anywhere */
 417    switch (mesaVis->depthBits) {
 418    case 0:                     /* what to do in this case? */
 419    case 16:
 420       intel->polygon_offset_scale = 1.0 / 0xffff;
 421       break;
 422    case 24:
 423       intel->polygon_offset_scale = 2.0 / 0xffffff;     /* req'd to pass glean */
 424       break;
 425    default:
 426       assert(0);
 427       break;
 428    }
 429
 430    /* Initialize swrast, tnl driver tables: */
 431    intelInitSpanFuncs(ctx);
 432    intelInitTriFuncs(ctx);
 433
 434
 435    intel->RenderIndex = ~0;
 436
 437    fthrottle_mode = driQueryOptioni(&intel->optionCache, "fthrottle_mode");
 438    intel->iw.irq_seq = -1;
 439    intel->irqsEmitted = 0;
 440
 441    intel->do_irqs = (intel->intelScreen->irq_active &&
 442                      fthrottle_mode == DRI_CONF_FTHROTTLE_IRQS);
 443
 444    intel->do_usleeps = (fthrottle_mode == DRI_CONF_FTHROTTLE_USLEEPS);
 445
 446    intel->vblank_flags = (intel->intelScreen->irq_active != 0)
 447       ? driGetDefaultVBlankFlags(&intel->optionCache) : VBLANK_FLAG_NO_IRQ;
 448
 449    (*dri_interface->getUST) (&intel->swap_ust);
 450    _math_matrix_ctr(&intel->ViewportMatrix);
 451
 452    /* Disable imaging extension until convolution is working in
 453     * teximage paths:
 454     */
 455    driInitExtensions(ctx, card_extensions,
 456 /*                    GL_TRUE, */
 457                      GL_FALSE);
 458
 459
 460    intel->batch = intel_batchbuffer_alloc(intel);
 461    intel->last_swap_fence = NULL;
 462    intel->first_swap_fence = NULL;
 463
 464    intel_bufferobj_init(intel);
 465    intel_fbo_init(intel);
 466
 467    if (intel->ctx.Mesa_DXTn) {
 468       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 469       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 470    }
 471    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 472       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 473    }
 474
 475    intel->prim.primitive = ~0;
 476
 477
 478 #if DO_DEBUG
 479    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 480 #endif
 481
 482    if (getenv("INTEL_NO_RAST")) {
 483       fprintf(stderr, "disabling 3D rasterization\n");
 484       FALLBACK(intel, INTEL_FALLBACK_USER, 1);
 485    }
 486
 487    return GL_TRUE;
 488 }
 489
 490 void
 491 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 492 {
 493    struct intel_context *intel =
 494       (struct intel_context *) driContextPriv->driverPrivate;
 495
 496    assert(intel);               /* should never be null */
 497    if (intel) {
 498       GLboolean release_texture_heaps;
 499
 500       INTEL_FIREVERTICES(intel);
 501
 502       intel->vtbl.destroy(intel);
 503
 504       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 505       _swsetup_DestroyContext(&intel->ctx);
 506       _tnl_DestroyContext(&intel->ctx);
 507       _vbo_DestroyContext(&intel->ctx);
 508
 509       _swrast_DestroyContext(&intel->ctx);
 510       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 511
 512       intel_batchbuffer_free(intel->batch);
 513
 514       if (intel->last_swap_fence) {
 515          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 516          driFenceUnReference(intel->last_swap_fence);
 517          intel->last_swap_fence = NULL;
 518       }
 519       if (intel->first_swap_fence) {
 520          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 521          driFenceUnReference(intel->first_swap_fence);
 522          intel->first_swap_fence = NULL;
 523       }
 524
 525
 526       if (release_texture_heaps) {
 527          /* This share group is about to go away, free our private
 528           * texture object data.
 529           */
 530          if (INTEL_DEBUG & DEBUG_TEXTURE)
 531             fprintf(stderr, "do something to free texture heaps\n");
 532       }
 533
 534       /* free the Mesa context */
 535       _mesa_free_context_data(&intel->ctx);
 536    }
 537 }
 538
 539 GLboolean
 540 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 541 {
 542    return GL_TRUE;
 543 }
 544
 545 GLboolean
 546 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 547                  __DRIdrawablePrivate * driDrawPriv,
 548                  __DRIdrawablePrivate * driReadPriv)
 549 {
 550
 551    if (driContextPriv) {
 552       struct intel_context *intel =
 553          (struct intel_context *) driContextPriv->driverPrivate;
 554       GLframebuffer *drawFb = (GLframebuffer *) driDrawPriv->driverPrivate;
 555       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 556
 557
 558       /* XXX FBO temporary fix-ups! */
 559       /* if the renderbuffers don't have regions, init them from the context */
 560       {
 561          struct intel_renderbuffer *irbFront
 562             = intel_get_renderbuffer(drawFb, BUFFER_FRONT_LEFT);
 563          struct intel_renderbuffer *irbBack
 564             = intel_get_renderbuffer(drawFb, BUFFER_BACK_LEFT);
 565          struct intel_renderbuffer *irbDepth
 566             = intel_get_renderbuffer(drawFb, BUFFER_DEPTH);
 567          struct intel_renderbuffer *irbStencil
 568             = intel_get_renderbuffer(drawFb, BUFFER_STENCIL);
 569
 570          if (irbFront && !irbFront->region) {
 571             intel_region_reference(&irbFront->region, intel->intelScreen->front_region);
 572          }
 573          if (irbBack && !irbBack->region) {
 574             intel_region_reference(&irbBack->region, intel->intelScreen->back_region);
 575          }
 576          if (irbDepth && !irbDepth->region) {
 577             intel_region_reference(&irbDepth->region, intel->intelScreen->depth_region);
 578          }
 579          if (irbStencil && !irbStencil->region) {
 580             intel_region_reference(&irbStencil->region, intel->intelScreen->depth_region);
 581          }
 582       }
 583
 584       /* set initial GLframebuffer size to match window, if needed */
 585       if (drawFb->Width == 0 && driDrawPriv->w) {
 586          _mesa_resize_framebuffer(&intel->ctx, drawFb,
 587                                   driDrawPriv->w, driDrawPriv->h);
 588       }
 589       if (readFb->Width == 0 && driReadPriv->w) {
 590          _mesa_resize_framebuffer(&intel->ctx, readFb,
 591                                   driReadPriv->w, driReadPriv->h);
 592       }
 593
 594       _mesa_make_current(&intel->ctx, drawFb, readFb);
 595
 596       /* The drawbuffer won't always be updated by _mesa_make_current:
 597        */
 598       if (intel->ctx.DrawBuffer == drawFb) {
 599
 600          if (intel->driDrawable != driDrawPriv) {
 601             driDrawableInitVBlank(driDrawPriv, intel->vblank_flags, &intel->vbl_seq);
 602             intel->driDrawable = driDrawPriv;
 603             intelWindowMoved(intel);
 604          }
 605
 606          intel_draw_buffer(&intel->ctx, drawFb);
 607       }
 608    }
 609    else {
 610       _mesa_make_current(NULL, NULL, NULL);
 611    }
 612
 613    return GL_TRUE;
 614 }
 615
 616 static void
 617 intelContendedLock(struct intel_context *intel, GLuint flags)
 618 {
 619    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 620    __DRIscreenPrivate *sPriv = intel->driScreen;
 621    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 622    drmI830Sarea *sarea = intel->sarea;
 623
 624    drmGetLock(intel->driFd, intel->hHWContext, flags);
 625
 626    if (INTEL_DEBUG & DEBUG_LOCK)
 627       _mesa_printf("%s - got contended lock\n", __progname);
 628
 629    /* If the window moved, may need to set a new cliprect now.
 630     *
 631     * NOTE: This releases and regains the hw lock, so all state
 632     * checking must be done *after* this call:
 633     */
 634    if (dPriv)
 635       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 636
 637    if (sarea->width != intelScreen->width ||
 638        sarea->height != intelScreen->height ||
 639        sarea->rotation != intelScreen->current_rotation) {
 640
 641       intelUpdateScreenRotation(sPriv, sarea);
 642    }
 643
 644    if (sarea->width != intel->width ||
 645        sarea->height != intel->height ||
 646        sarea->rotation != intel->current_rotation) {
 647
 648       void *batchMap = intel->batch->map;
 649
 650       /*
 651        * FIXME: Really only need to do this when drawing to a
 652        * common back- or front buffer.
 653        */
 654
 655       /*
 656        * This will drop the outstanding batchbuffer on the floor
 657        */
 658
 659       if (batchMap != NULL) {
 660          driBOUnmap(intel->batch->buffer);
 661          intel->batch->map = NULL;
 662       }
 663
 664       intel_batchbuffer_reset(intel->batch);
 665
 666       if (batchMap == NULL) {
 667          driBOUnmap(intel->batch->buffer);
 668          intel->batch->map = NULL;
 669       }
 670
 671       /* lose all primitives */
 672       intel->prim.primitive = ~0;
 673       intel->prim.start_ptr = 0;
 674       intel->prim.flush = 0;
 675
 676       /* re-emit all state */
 677       intel->vtbl.lost_hardware(intel);
 678
 679       /* force window update */
 680       intel->lastStamp = 0;
 681
 682       intel->width = sarea->width;
 683       intel->height = sarea->height;
 684       intel->current_rotation = sarea->rotation;
 685    }
 686
 687    /* Drawable changed?
 688     */
 689    if (dPriv && intel->lastStamp != dPriv->lastStamp) {
 690       intelWindowMoved(intel);
 691       intel->lastStamp = dPriv->lastStamp;
 692    }
 693
 694    /* Update page flipping info
 695     */
 696    if (INTEL_DEBUG & DEBUG_LOCK)
 697       if (intel->doPageFlip != intel->sarea->pf_active)
 698          _mesa_printf("%s - age flipping %sactive\n", __progname,
 699                       intel->sarea->pf_active ? "" : "in");
 700
 701    intel->doPageFlip = intel->sarea->pf_active;
 702    driFlipRenderbuffers(intel->ctx.WinSysDrawBuffer,
 703                         intel->sarea->pf_current_page);
 704    intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 705 }
 706
 707
 708 /* Lock the hardware and validate our state.
 709  */
 710 void LOCK_HARDWARE( struct intel_context *intel )
 711 {
 712     char __ret=0;
 713
 714     _glthread_LOCK_MUTEX(lockMutex);
 715     assert(!intel->locked);
 716
 717     if (intel->swap_scheduled) {
 718         drmVBlank vbl;
 719         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 720         if ( intel->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 721             vbl.request.type |= DRM_VBLANK_SECONDARY;
 722         }
 723         vbl.request.sequence = intel->vbl_seq;
 724         drmWaitVBlank(intel->driFd, &vbl);
 725         intel->swap_scheduled = 0;
 726     }
 727
 728     DRM_CAS(intel->driHwLock, intel->hHWContext,
 729         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 730
 731     if (__ret)
 732         intelContendedLock( intel, 0 );
 733
 734     if (INTEL_DEBUG & DEBUG_LOCK)
 735       _mesa_printf("%s - locked\n", __progname);
 736
 737     intel->locked = 1;
 738 }
 739
 740
 741   /* Unlock the hardware using the global current context
 742    */
 743 void UNLOCK_HARDWARE( struct intel_context *intel )
 744 {
 745    intel->locked = 0;
 746
 747    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 748
 749    _glthread_UNLOCK_MUTEX(lockMutex);
 750
 751    if (INTEL_DEBUG & DEBUG_LOCK)
 752       _mesa_printf("%s - unlocked\n", __progname);
 753 }
 754