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 "pipe/softpipe/sp_context.h"
  64 #include "state_tracker/st_public.h"
  65
  66
  67 #include "drirenderbuffer.h"
  68 #include "vblank.h"
  69 #include "utils.h"
  70 #include "xmlpool.h"            /* for symbolic values of enum-type options */
  71 #ifndef INTEL_DEBUG
  72 int INTEL_DEBUG = (0);
  73 #endif
  74
  75 #define need_GL_ARB_multisample
  76 #define need_GL_ARB_point_parameters
  77 #define need_GL_ARB_texture_compression
  78 #define need_GL_ARB_vertex_buffer_object
  79 #define need_GL_ARB_vertex_program
  80 #define need_GL_ARB_window_pos
  81 #define need_GL_EXT_blend_color
  82 #define need_GL_EXT_blend_equation_separate
  83 #define need_GL_EXT_blend_func_separate
  84 #define need_GL_EXT_blend_minmax
  85 #define need_GL_EXT_cull_vertex
  86 #define need_GL_EXT_fog_coord
  87 #define need_GL_EXT_framebuffer_object
  88 #define need_GL_EXT_multi_draw_arrays
  89 #define need_GL_EXT_secondary_color
  90 #define need_GL_NV_vertex_program
  91 #include "extension_helper.h"
  92
  93
  94 #define DRIVER_DATE                     "20061102"
  95
  96 _glthread_Mutex lockMutex;
  97 static GLboolean lockMutexInit = GL_FALSE;
  98
  99
 100 static const GLubyte *
 101 intelGetString(GLcontext * ctx, GLenum name)
 102 {
 103    const char *chipset;
 104    static char buffer[128];
 105
 106    switch (name) {
 107    case GL_VENDOR:
 108       return (GLubyte *) "Tungsten Graphics, Inc";
 109       break;
 110
 111    case GL_RENDERER:
 112       switch (intel_context(ctx)->intelScreen->deviceID) {
 113       case PCI_CHIP_845_G:
 114          chipset = "Intel(R) 845G";
 115          break;
 116       case PCI_CHIP_I830_M:
 117          chipset = "Intel(R) 830M";
 118          break;
 119       case PCI_CHIP_I855_GM:
 120          chipset = "Intel(R) 852GM/855GM";
 121          break;
 122       case PCI_CHIP_I865_G:
 123          chipset = "Intel(R) 865G";
 124          break;
 125       case PCI_CHIP_I915_G:
 126          chipset = "Intel(R) 915G";
 127          break;
 128       case PCI_CHIP_I915_GM:
 129          chipset = "Intel(R) 915GM";
 130          break;
 131       case PCI_CHIP_I945_G:
 132          chipset = "Intel(R) 945G";
 133          break;
 134       case PCI_CHIP_I945_GM:
 135          chipset = "Intel(R) 945GM";
 136          break;
 137       case PCI_CHIP_I945_GME:
 138          chipset = "Intel(R) 945GME";
 139          break;
 140       case PCI_CHIP_G33_G:
 141          chipset = "Intel(R) G33";
 142          break;
 143       case PCI_CHIP_Q35_G:
 144          chipset = "Intel(R) Q35";
 145          break;
 146       case PCI_CHIP_Q33_G:
 147          chipset = "Intel(R) Q33";
 148          break;
 149       default:
 150          chipset = "Unknown Intel Chipset";
 151          break;
 152       }
 153
 154       (void) driGetRendererString(buffer, chipset, DRIVER_DATE, 0);
 155       return (GLubyte *) buffer;
 156
 157    default:
 158       return NULL;
 159    }
 160 }
 161
 162
 163 /**
 164  * Extension strings exported by the intel driver.
 165  *
 166  * \note
 167  * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
 168  * old i830-specific driver.
 169  */
 170 const struct dri_extension card_extensions[] = {
 171    {"GL_ARB_multisample", GL_ARB_multisample_functions},
 172    {"GL_ARB_multitexture", NULL},
 173    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
 174    {"GL_ARB_texture_border_clamp", NULL},
 175    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
 176    {"GL_ARB_texture_cube_map", NULL},
 177    {"GL_ARB_texture_env_add", NULL},
 178    {"GL_ARB_texture_env_combine", NULL},
 179    {"GL_ARB_texture_env_dot3", NULL},
 180    {"GL_ARB_texture_mirrored_repeat", NULL},
 181    {"GL_ARB_texture_rectangle", NULL},
 182    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
 183    {"GL_ARB_pixel_buffer_object", NULL},
 184    {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
 185    {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
 186    {"GL_EXT_blend_color", GL_EXT_blend_color_functions},
 187    {"GL_EXT_blend_equation_separate",
 188     GL_EXT_blend_equation_separate_functions},
 189    {"GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions},
 190    {"GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions},
 191    {"GL_EXT_blend_subtract", NULL},
 192    {"GL_EXT_cull_vertex", GL_EXT_cull_vertex_functions},
 193    {"GL_EXT_fog_coord", GL_EXT_fog_coord_functions},
 194    {"GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions},
 195    {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions},
 196 #if 1                           /* XXX FBO temporary? */
 197    {"GL_EXT_packed_depth_stencil", NULL},
 198 #endif
 199    {"GL_EXT_pixel_buffer_object", NULL},
 200    {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions},
 201    {"GL_EXT_stencil_wrap", NULL},
 202    {"GL_EXT_texture_edge_clamp", NULL},
 203    {"GL_EXT_texture_env_combine", NULL},
 204    {"GL_EXT_texture_env_dot3", NULL},
 205    {"GL_EXT_texture_filter_anisotropic", NULL},
 206    {"GL_EXT_texture_lod_bias", NULL},
 207    {"GL_3DFX_texture_compression_FXT1", NULL},
 208    {"GL_APPLE_client_storage", NULL},
 209    {"GL_MESA_pack_invert", NULL},
 210    {"GL_MESA_ycbcr_texture", NULL},
 211    {"GL_NV_blend_square", NULL},
 212    {"GL_NV_vertex_program", GL_NV_vertex_program_functions},
 213    {"GL_NV_vertex_program1_1", NULL},
 214 /*     { "GL_SGIS_generate_mipmap",           NULL }, */
 215    {NULL, NULL}
 216 };
 217
 218 extern const struct tnl_pipeline_stage _intel_render_stage;
 219
 220 static const struct tnl_pipeline_stage *intel_pipeline[] = {
 221    &_tnl_vertex_transform_stage,
 222    &_tnl_vertex_cull_stage,
 223    &_tnl_normal_transform_stage,
 224    &_tnl_lighting_stage,
 225    &_tnl_fog_coordinate_stage,
 226    &_tnl_texgen_stage,
 227    &_tnl_texture_transform_stage,
 228    &_tnl_point_attenuation_stage,
 229    &_tnl_vertex_program_stage,
 230 #if 1
 231    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 232 #endif
 233    &_tnl_render_stage,
 234    0,
 235 };
 236
 237
 238 static const struct dri_debug_control debug_control[] = {
 239    {"tex", DEBUG_TEXTURE},
 240    {"state", DEBUG_STATE},
 241    {"ioctl", DEBUG_IOCTL},
 242    {"blit", DEBUG_BLIT},
 243    {"mip", DEBUG_MIPTREE},
 244    {"fall", DEBUG_FALLBACKS},
 245    {"verb", DEBUG_VERBOSE},
 246    {"bat", DEBUG_BATCH},
 247    {"pix", DEBUG_PIXEL},
 248    {"buf", DEBUG_BUFMGR},
 249    {"reg", DEBUG_REGION},
 250    {"fbo", DEBUG_FBO},
 251    {"lock", DEBUG_LOCK},
 252    {NULL, 0}
 253 };
 254
 255
 256 static void
 257 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 258 {
 259    _swrast_InvalidateState(ctx, new_state);
 260    _swsetup_InvalidateState(ctx, new_state);
 261    _vbo_InvalidateState(ctx, new_state);
 262    _tnl_InvalidateState(ctx, new_state);
 263    _tnl_invalidate_vertex_state(ctx, new_state);
 264
 265    st_invalidate_state( ctx, new_state );
 266
 267    intel_context(ctx)->NewGLState |= new_state;
 268 }
 269
 270
 271 void
 272 intelFlush(GLcontext * ctx)
 273 {
 274    struct intel_context *intel = intel_context(ctx);
 275
 276    if (intel->Fallback)
 277       _swrast_flush(ctx);
 278
 279    INTEL_FIREVERTICES(intel);
 280
 281    if (intel->batch->map != intel->batch->ptr)
 282       intel_batchbuffer_flush(intel->batch);
 283
 284    /* XXX: Need to do an MI_FLUSH here.
 285     */
 286 }
 287
 288
 289 /**
 290  * Check if we need to rotate/warp the front color buffer to the
 291  * rotated screen.  We generally need to do this when we get a glFlush
 292  * or glFinish after drawing to the front color buffer.
 293  * If no rotation, just copy the private fake front buffer to the real one.
 294  */
 295 static void
 296 intelCheckFrontUpdate(GLcontext * ctx)
 297 {
 298    struct intel_context *intel = intel_context(ctx);
 299    /* rely on _ColorDrawBufferMask being kept up to date by mesa
 300       even for window-fbos. */
 301    /* not sure. Might need that for all masks including
 302       BUFFER_BIT_FRONT_LEFT maybe? */
 303    if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] ==
 304        BUFFER_BIT_FRONT_LEFT) {
 305       __DRIdrawablePrivate *dPriv = intel->driDrawable;
 306       intelCopyBuffer(dPriv, NULL);
 307    }
 308 }
 309
 310
 311 /**
 312  * Called via glFlush.
 313  */
 314 static void
 315 intelglFlush(GLcontext * ctx)
 316 {
 317    intelFlush(ctx);
 318    intelCheckFrontUpdate(ctx);
 319 }
 320
 321 void
 322 intelFinish(GLcontext * ctx)
 323 {
 324    struct intel_context *intel = intel_context(ctx);
 325    intelFlush(ctx);
 326    if (intel->batch->last_fence) {
 327       driFenceFinish(intel->batch->last_fence,
 328                      0, GL_FALSE);
 329       driFenceUnReference(intel->batch->last_fence);
 330       intel->batch->last_fence = NULL;
 331    }
 332    intelCheckFrontUpdate(ctx);
 333 }
 334
 335
 336 void
 337 intelInitDriverFunctions(struct dd_function_table *functions)
 338 {
 339    _mesa_init_driver_functions(functions);
 340
 341    functions->Flush = intelglFlush;
 342    functions->Finish = intelFinish;
 343    functions->GetString = intelGetString;
 344    functions->UpdateState = intelInvalidateState;
 345    functions->CopyColorTable = _swrast_CopyColorTable;
 346    functions->CopyColorSubTable = _swrast_CopyColorSubTable;
 347    functions->CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
 348    functions->CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
 349
 350    intelInitTextureFuncs(functions);
 351    intelInitPixelFuncs(functions);
 352    intelInitStateFuncs(functions);
 353    intelInitBufferFuncs(functions);
 354 }
 355
 356
 357 GLboolean
 358 intelInitContext(struct intel_context *intel,
 359                  const __GLcontextModes * mesaVis,
 360                  __DRIcontextPrivate * driContextPriv,
 361                  void *sharedContextPrivate,
 362                  struct dd_function_table *functions)
 363 {
 364    GLcontext *ctx = &intel->ctx;
 365    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 366    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 367    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 368    drmI830Sarea *saPriv = (drmI830Sarea *)
 369       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 370    int fthrottle_mode;
 371    GLboolean havePools;
 372
 373    DRM_LIGHT_LOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 374    havePools = intelCreatePools(intelScreen);
 375    DRM_UNLOCK(sPriv->fd, &sPriv->pSAREA->lock, driContextPriv->hHWContext);
 376
 377    if (!havePools)
 378       return GL_FALSE;
 379
 380    if (!_mesa_initialize_context(&intel->ctx,
 381                                  mesaVis, shareCtx,
 382                                  functions, (void *) intel))
 383       return GL_FALSE;
 384
 385    driContextPriv->driverPrivate = intel;
 386    intel->intelScreen = intelScreen;
 387    intel->driScreen = sPriv;
 388    intel->sarea = saPriv;
 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
 515    st_create_context( &intel->ctx,
 516                       softpipe_create() );
 517
 518
 519    return GL_TRUE;
 520 }
 521
 522 void
 523 intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 524 {
 525    struct intel_context *intel =
 526       (struct intel_context *) driContextPriv->driverPrivate;
 527
 528    assert(intel);               /* should never be null */
 529    if (intel) {
 530       GLboolean release_texture_heaps;
 531
 532       INTEL_FIREVERTICES(intel);
 533
 534       intel->vtbl.destroy(intel);
 535
 536       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 537       _swsetup_DestroyContext(&intel->ctx);
 538       _tnl_DestroyContext(&intel->ctx);
 539       _vbo_DestroyContext(&intel->ctx);
 540
 541       _swrast_DestroyContext(&intel->ctx);
 542       intel->Fallback = 0;      /* don't call _swrast_Flush later */
 543
 544       intel_batchbuffer_free(intel->batch);
 545
 546       if (intel->last_swap_fence) {
 547          driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 548          driFenceUnReference(intel->last_swap_fence);
 549          intel->last_swap_fence = NULL;
 550       }
 551       if (intel->first_swap_fence) {
 552          driFenceFinish(intel->first_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
 553          driFenceUnReference(intel->first_swap_fence);
 554          intel->first_swap_fence = NULL;
 555       }
 556
 557
 558       if (release_texture_heaps) {
 559          /* This share group is about to go away, free our private
 560           * texture object data.
 561           */
 562          if (INTEL_DEBUG & DEBUG_TEXTURE)
 563             fprintf(stderr, "do something to free texture heaps\n");
 564       }
 565
 566       /* free the Mesa context */
 567       _mesa_free_context_data(&intel->ctx);
 568    }
 569 }
 570
 571 GLboolean
 572 intelUnbindContext(__DRIcontextPrivate * driContextPriv)
 573 {
 574    struct intel_context *intel = (struct intel_context *) driContextPriv->driverPrivate;
 575    /* XXX UnbindContext is called AFTER the new context is made current.
 576       Hopefully shouldn't be a problem ? */
 577    FLUSH_VERTICES((&intel->ctx), 0);
 578    intelFlush(&intel->ctx);
 579    return GL_TRUE;
 580 }
 581
 582 GLboolean
 583 intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 584                  __DRIdrawablePrivate * driDrawPriv,
 585                  __DRIdrawablePrivate * driReadPriv)
 586 {
 587
 588 #if 0
 589    if (driDrawPriv) {
 590       fprintf(stderr, "x %d, y %d, width %d, height %d\n",
 591               driDrawPriv->x, driDrawPriv->y, driDrawPriv->w, driDrawPriv->h);
 592    }
 593 #endif
 594
 595    if (driContextPriv) {
 596       struct intel_context *intel =
 597          (struct intel_context *) driContextPriv->driverPrivate;
 598       struct intel_framebuffer *intel_fb =
 599          (struct intel_framebuffer *) driDrawPriv->driverPrivate;
 600       GLframebuffer *readFb = (GLframebuffer *) driReadPriv->driverPrivate;
 601
 602       /* this is a hack so we have a valid context when the region allocation
 603          is done. Need a per-screen context? */
 604       intel->intelScreen->dummyctxptr = intel;
 605
 606       /* update GLframebuffer size to match window if needed */
 607       driUpdateFramebufferSize(&intel->ctx, driDrawPriv);
 608
 609       if (driReadPriv != driDrawPriv) {
 610          driUpdateFramebufferSize(&intel->ctx, driReadPriv);
 611       }
 612
 613       _mesa_make_current(&intel->ctx, &intel_fb->Base, readFb);
 614
 615       /* The drawbuffer won't always be updated by _mesa_make_current:
 616        */
 617       if (intel->ctx.DrawBuffer == &intel_fb->Base) {
 618
 619          if (intel->driDrawable != driDrawPriv) {
 620             if (driDrawPriv->pdraw->swap_interval == (unsigned)-1) {
 621                int i;
 622
 623                intel_fb->vblank_flags = (intel->intelScreen->irq_active != 0)
 624                   ? driGetDefaultVBlankFlags(&intel->optionCache)
 625                  : VBLANK_FLAG_NO_IRQ;
 626
 627                (*dri_interface->getUST) (&intel_fb->swap_ust);
 628                driDrawableInitVBlank(driDrawPriv, intel_fb->vblank_flags,
 629                                      &intel_fb->vbl_seq);
 630                intel_fb->vbl_waited = intel_fb->vbl_seq;
 631
 632                for (i = 0; i < 2; i++) {
 633                   if (intel_fb->color_rb[i])
 634                      intel_fb->color_rb[i]->vbl_pending = intel_fb->vbl_seq;
 635                }
 636             }
 637          }
 638       }
 639
 640       if ((intel->driDrawable != driDrawPriv) ||
 641           (intel->lastStamp != driDrawPriv->lastStamp)) {
 642             intel->driDrawable = driDrawPriv;
 643             intelWindowMoved(intel);
 644             intel->lastStamp = driDrawPriv->lastStamp;
 645       }
 646
 647    }
 648    else {
 649       _mesa_make_current(NULL, NULL, NULL);
 650    }
 651
 652    return GL_TRUE;
 653 }
 654
 655 static void
 656 intelContendedLock(struct intel_context *intel, GLuint flags)
 657 {
 658    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 659    __DRIscreenPrivate *sPriv = intel->driScreen;
 660    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 661    drmI830Sarea *sarea = intel->sarea;
 662
 663    drmGetLock(intel->driFd, intel->hHWContext, flags);
 664
 665    if (INTEL_DEBUG & DEBUG_LOCK)
 666       _mesa_printf("%s - got contended lock\n", __progname);
 667
 668    /* If the window moved, may need to set a new cliprect now.
 669     *
 670     * NOTE: This releases and regains the hw lock, so all state
 671     * checking must be done *after* this call:
 672     */
 673    if (dPriv)
 674       DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
 675
 676    if (sarea->width != intelScreen->width ||
 677        sarea->height != intelScreen->height) {
 678
 679       intelUpdateScreenRotation(sPriv, sarea);
 680    }
 681
 682 #if 0
 683    if (sarea->width != intel->width ||
 684        sarea->height != intel->height ||
 685        sarea->rotation != intel->current_rotation) {
 686       int numClipRects = intel->numClipRects;
 687
 688       /*
 689        * FIXME: Really only need to do this when drawing to a
 690        * common back- or front buffer.
 691        */
 692
 693       /*
 694        * This will essentially drop the outstanding batchbuffer on the floor.
 695        */
 696       intel->numClipRects = 0;
 697
 698       if (intel->Fallback)
 699          _swrast_flush(&intel->ctx);
 700
 701       INTEL_FIREVERTICES(intel);
 702
 703       if (intel->batch->map != intel->batch->ptr)
 704          intel_batchbuffer_flush(intel->batch);
 705
 706       intel->numClipRects = numClipRects;
 707
 708       /* force window update */
 709       intel->lastStamp = 0;
 710
 711       intel->width = sarea->width;
 712       intel->height = sarea->height;
 713       intel->current_rotation = sarea->rotation;
 714    }
 715 #endif
 716 }
 717
 718
 719 /* Lock the hardware and validate our state.
 720  */
 721 void LOCK_HARDWARE( struct intel_context *intel )
 722 {
 723     char __ret=0;
 724     struct intel_framebuffer *intel_fb = NULL;
 725     struct intel_renderbuffer *intel_rb = NULL;
 726     _glthread_LOCK_MUTEX(lockMutex);
 727     assert(!intel->locked);
 728
 729     if (intel->driDrawable) {
 730        intel_fb = intel->driDrawable->driverPrivate;
 731
 732        if (intel_fb)
 733           intel_rb =
 734              intel_get_renderbuffer(&intel_fb->Base,
 735                                     intel_fb->Base._ColorDrawBufferMask[0] ==
 736                                     BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 737                                     BUFFER_BACK_LEFT);
 738     }
 739
 740     if (intel_rb && intel_fb->vblank_flags &&
 741         !(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) &&
 742         (intel_fb->vbl_waited - intel_rb->vbl_pending) > (1<<23)) {
 743         drmVBlank vbl;
 744
 745         vbl.request.type = DRM_VBLANK_ABSOLUTE;
 746
 747         if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 748             vbl.request.type |= DRM_VBLANK_SECONDARY;
 749         }
 750
 751         vbl.request.sequence = intel_rb->vbl_pending;
 752         drmWaitVBlank(intel->driFd, &vbl);
 753         intel_fb->vbl_waited = vbl.reply.sequence;
 754     }
 755
 756     DRM_CAS(intel->driHwLock, intel->hHWContext,
 757         (DRM_LOCK_HELD|intel->hHWContext), __ret);
 758
 759     if (__ret)
 760         intelContendedLock( intel, 0 );
 761
 762     if (INTEL_DEBUG & DEBUG_LOCK)
 763       _mesa_printf("%s - locked\n", __progname);
 764
 765     intel->locked = 1;
 766 }
 767
 768
 769   /* Unlock the hardware using the global current context
 770    */
 771 void UNLOCK_HARDWARE( struct intel_context *intel )
 772 {
 773    intel->locked = 0;
 774
 775    DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
 776
 777    _glthread_UNLOCK_MUTEX(lockMutex);
 778
 779    if (INTEL_DEBUG & DEBUG_LOCK)
 780       _mesa_printf("%s - unlocked\n", __progname);
 781 }
 782