src/mesa/drivers/dri/intel/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 "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/extensions.h"
  32 #include "main/fbobject.h"
  33 #include "main/framebuffer.h"
  34 #include "main/imports.h"
  35 #include "main/points.h"
  36 #include "main/renderbuffer.h"
  37
  38 #include "swrast/swrast.h"
  39 #include "swrast_setup/swrast_setup.h"
  40 #include "tnl/tnl.h"
  41 #include "drivers/common/driverfuncs.h"
  42 #include "drivers/common/meta.h"
  43
  44 #include "intel_chipset.h"
  45 #include "intel_buffers.h"
  46 #include "intel_tex.h"
  47 #include "intel_batchbuffer.h"
  48 #include "intel_clear.h"
  49 #include "intel_extensions.h"
  50 #include "intel_pixel.h"
  51 #include "intel_regions.h"
  52 #include "intel_buffer_objects.h"
  53 #include "intel_fbo.h"
  54 #include "intel_bufmgr.h"
  55 #include "intel_screen.h"
  56 #include "intel_mipmap_tree.h"
  57
  58 #include "utils.h"
  59 #include "../glsl/ralloc.h"
  60
  61 #ifndef INTEL_DEBUG
  62 int INTEL_DEBUG = (0);
  63 #endif
  64
  65
  66 static const GLubyte *
  67 intelGetString(struct gl_context * ctx, GLenum name)
  68 {
  69    const struct intel_context *const intel = intel_context(ctx);
  70    const char *chipset;
  71    static char buffer[128];
  72
  73    switch (name) {
  74    case GL_VENDOR:
  75       return (GLubyte *) "Intel Open Source Technology Center";
  76       break;
  77
  78    case GL_RENDERER:
  79       switch (intel->intelScreen->deviceID) {
  80       case PCI_CHIP_845_G:
  81          chipset = "Intel(R) 845G";
  82          break;
  83       case PCI_CHIP_I830_M:
  84          chipset = "Intel(R) 830M";
  85          break;
  86       case PCI_CHIP_I855_GM:
  87          chipset = "Intel(R) 852GM/855GM";
  88          break;
  89       case PCI_CHIP_I865_G:
  90          chipset = "Intel(R) 865G";
  91          break;
  92       case PCI_CHIP_I915_G:
  93          chipset = "Intel(R) 915G";
  94          break;
  95       case PCI_CHIP_E7221_G:
  96          chipset = "Intel (R) E7221G (i915)";
  97          break;
  98       case PCI_CHIP_I915_GM:
  99          chipset = "Intel(R) 915GM";
 100          break;
 101       case PCI_CHIP_I945_G:
 102          chipset = "Intel(R) 945G";
 103          break;
 104       case PCI_CHIP_I945_GM:
 105          chipset = "Intel(R) 945GM";
 106          break;
 107       case PCI_CHIP_I945_GME:
 108          chipset = "Intel(R) 945GME";
 109          break;
 110       case PCI_CHIP_G33_G:
 111          chipset = "Intel(R) G33";
 112          break;
 113       case PCI_CHIP_Q35_G:
 114          chipset = "Intel(R) Q35";
 115          break;
 116       case PCI_CHIP_Q33_G:
 117          chipset = "Intel(R) Q33";
 118          break;
 119       case PCI_CHIP_IGD_GM:
 120       case PCI_CHIP_IGD_G:
 121          chipset = "Intel(R) IGD";
 122          break;
 123       case PCI_CHIP_I965_Q:
 124          chipset = "Intel(R) 965Q";
 125          break;
 126       case PCI_CHIP_I965_G:
 127       case PCI_CHIP_I965_G_1:
 128          chipset = "Intel(R) 965G";
 129          break;
 130       case PCI_CHIP_I946_GZ:
 131          chipset = "Intel(R) 946GZ";
 132          break;
 133       case PCI_CHIP_I965_GM:
 134          chipset = "Intel(R) 965GM";
 135          break;
 136       case PCI_CHIP_I965_GME:
 137          chipset = "Intel(R) 965GME/GLE";
 138          break;
 139       case PCI_CHIP_GM45_GM:
 140          chipset = "Mobile Intel® GM45 Express Chipset";
 141          break;
 142       case PCI_CHIP_IGD_E_G:
 143          chipset = "Intel(R) Integrated Graphics Device";
 144          break;
 145       case PCI_CHIP_G45_G:
 146          chipset = "Intel(R) G45/G43";
 147          break;
 148       case PCI_CHIP_Q45_G:
 149          chipset = "Intel(R) Q45/Q43";
 150          break;
 151       case PCI_CHIP_G41_G:
 152          chipset = "Intel(R) G41";
 153          break;
 154       case PCI_CHIP_B43_G:
 155       case PCI_CHIP_B43_G1:
 156          chipset = "Intel(R) B43";
 157          break;
 158       case PCI_CHIP_ILD_G:
 159          chipset = "Intel(R) Ironlake Desktop";
 160          break;
 161       case PCI_CHIP_ILM_G:
 162          chipset = "Intel(R) Ironlake Mobile";
 163          break;
 164       case PCI_CHIP_SANDYBRIDGE_GT1:
 165       case PCI_CHIP_SANDYBRIDGE_GT2:
 166       case PCI_CHIP_SANDYBRIDGE_GT2_PLUS:
 167          chipset = "Intel(R) Sandybridge Desktop";
 168          break;
 169       case PCI_CHIP_SANDYBRIDGE_M_GT1:
 170       case PCI_CHIP_SANDYBRIDGE_M_GT2:
 171       case PCI_CHIP_SANDYBRIDGE_M_GT2_PLUS:
 172          chipset = "Intel(R) Sandybridge Mobile";
 173          break;
 174       case PCI_CHIP_SANDYBRIDGE_S:
 175          chipset = "Intel(R) Sandybridge Server";
 176          break;
 177       case PCI_CHIP_IVYBRIDGE_GT1:
 178       case PCI_CHIP_IVYBRIDGE_GT2:
 179          chipset = "Intel(R) Ivybridge Desktop";
 180          break;
 181       case PCI_CHIP_IVYBRIDGE_M_GT1:
 182       case PCI_CHIP_IVYBRIDGE_M_GT2:
 183          chipset = "Intel(R) Ivybridge Mobile";
 184          break;
 185       case PCI_CHIP_IVYBRIDGE_S_GT1:
 186       case PCI_CHIP_IVYBRIDGE_S_GT2:
 187          chipset = "Intel(R) Ivybridge Server";
 188          break;
 189       case PCI_CHIP_HASWELL_GT1:
 190       case PCI_CHIP_HASWELL_GT2:
 191          chipset = "Intel(R) Haswell Desktop";
 192          break;
 193       case PCI_CHIP_HASWELL_M_GT1:
 194       case PCI_CHIP_HASWELL_M_GT2:
 195       case PCI_CHIP_HASWELL_M_ULT_GT2:
 196          chipset = "Intel(R) Haswell Mobile";
 197          break;
 198       default:
 199          chipset = "Unknown Intel Chipset";
 200          break;
 201       }
 202
 203       (void) driGetRendererString(buffer, chipset, 0);
 204       return (GLubyte *) buffer;
 205
 206    default:
 207       return NULL;
 208    }
 209 }
 210
 211 static void
 212 intel_flush_front(struct gl_context *ctx)
 213 {
 214    struct intel_context *intel = intel_context(ctx);
 215     __DRIcontext *driContext = intel->driContext;
 216     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 217
 218     if (_mesa_is_winsys_fbo(ctx->DrawBuffer) && intel->front_buffer_dirty) {
 219       if (screen->dri2.loader->flushFrontBuffer != NULL &&
 220           driContext->driDrawablePriv &&
 221           driContext->driDrawablePriv->loaderPrivate) {
 222          (*screen->dri2.loader->flushFrontBuffer)(driContext->driDrawablePriv,
 223                                                   driContext->driDrawablePriv->loaderPrivate);
 224
 225          /* We set the dirty bit in intel_prepare_render() if we're
 226           * front buffer rendering once we get there.
 227           */
 228          intel->front_buffer_dirty = false;
 229       }
 230    }
 231 }
 232
 233 static unsigned
 234 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
 235 {
 236    return _mesa_get_format_bytes(intel_rb_format(rb)) * 8;
 237 }
 238
 239 static void
 240 intel_query_dri2_buffers(struct intel_context *intel,
 241                          __DRIdrawable *drawable,
 242                          __DRIbuffer **buffers,
 243                          int *count);
 244
 245 static void
 246 intel_process_dri2_buffer(struct intel_context *intel,
 247                           __DRIdrawable *drawable,
 248                           __DRIbuffer *buffer,
 249                           struct intel_renderbuffer *rb,
 250                           const char *buffer_name);
 251
 252 void
 253 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
 254 {
 255    struct gl_framebuffer *fb = drawable->driverPrivate;
 256    struct intel_renderbuffer *rb;
 257    struct intel_context *intel = context->driverPrivate;
 258    __DRIbuffer *buffers = NULL;
 259    int i, count;
 260    const char *region_name;
 261
 262    /* If we're rendering to the fake front buffer, make sure all the
 263     * pending drawing has landed on the real front buffer.  Otherwise
 264     * when we eventually get to DRI2GetBuffersWithFormat the stale
 265     * real front buffer contents will get copied to the new fake front
 266     * buffer.
 267     */
 268    if (intel->is_front_buffer_rendering) {
 269       intel_flush(&intel->ctx);
 270       intel_flush_front(&intel->ctx);
 271    }
 272
 273    /* Set this up front, so that in case our buffers get invalidated
 274     * while we're getting new buffers, we don't clobber the stamp and
 275     * thus ignore the invalidate. */
 276    drawable->lastStamp = drawable->dri2.stamp;
 277
 278    if (unlikely(INTEL_DEBUG & DEBUG_DRI))
 279       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 280
 281    intel_query_dri2_buffers(intel, drawable, &buffers, &count);
 282
 283    if (buffers == NULL)
 284       return;
 285
 286    for (i = 0; i < count; i++) {
 287        switch (buffers[i].attachment) {
 288        case __DRI_BUFFER_FRONT_LEFT:
 289            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 290            region_name = "dri2 front buffer";
 291            break;
 292
 293        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 294            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 295            region_name = "dri2 fake front buffer";
 296            break;
 297
 298        case __DRI_BUFFER_BACK_LEFT:
 299            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 300            region_name = "dri2 back buffer";
 301            break;
 302
 303        case __DRI_BUFFER_DEPTH:
 304        case __DRI_BUFFER_HIZ:
 305        case __DRI_BUFFER_DEPTH_STENCIL:
 306        case __DRI_BUFFER_STENCIL:
 307        case __DRI_BUFFER_ACCUM:
 308        default:
 309            fprintf(stderr,
 310                    "unhandled buffer attach event, attachment type %d\n",
 311                    buffers[i].attachment);
 312            return;
 313        }
 314
 315        intel_process_dri2_buffer(intel, drawable, &buffers[i], rb, region_name);
 316    }
 317
 318    driUpdateFramebufferSize(&intel->ctx, drawable);
 319 }
 320
 321 /**
 322  * intel_prepare_render should be called anywhere that curent read/drawbuffer
 323  * state is required.
 324  */
 325 void
 326 intel_prepare_render(struct intel_context *intel)
 327 {
 328    __DRIcontext *driContext = intel->driContext;
 329    __DRIdrawable *drawable;
 330
 331    drawable = driContext->driDrawablePriv;
 332    if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
 333       if (drawable->lastStamp != drawable->dri2.stamp)
 334          intel_update_renderbuffers(driContext, drawable);
 335       intel_draw_buffer(&intel->ctx);
 336       driContext->dri2.draw_stamp = drawable->dri2.stamp;
 337    }
 338
 339    drawable = driContext->driReadablePriv;
 340    if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
 341       if (drawable->lastStamp != drawable->dri2.stamp)
 342          intel_update_renderbuffers(driContext, drawable);
 343       driContext->dri2.read_stamp = drawable->dri2.stamp;
 344    }
 345
 346    /* If we're currently rendering to the front buffer, the rendering
 347     * that will happen next will probably dirty the front buffer.  So
 348     * mark it as dirty here.
 349     */
 350    if (intel->is_front_buffer_rendering)
 351       intel->front_buffer_dirty = true;
 352
 353    /* Wait for the swapbuffers before the one we just emitted, so we
 354     * don't get too many swaps outstanding for apps that are GPU-heavy
 355     * but not CPU-heavy.
 356     *
 357     * We're using intelDRI2Flush (called from the loader before
 358     * swapbuffer) and glFlush (for front buffer rendering) as the
 359     * indicator that a frame is done and then throttle when we get
 360     * here as we prepare to render the next frame.  At this point for
 361     * round trips for swap/copy and getting new buffers are done and
 362     * we'll spend less time waiting on the GPU.
 363     *
 364     * Unfortunately, we don't have a handle to the batch containing
 365     * the swap, and getting our hands on that doesn't seem worth it,
 366     * so we just us the first batch we emitted after the last swap.
 367     */
 368    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
 369       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
 370       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 371       intel->first_post_swapbuffers_batch = NULL;
 372       intel->need_throttle = false;
 373    }
 374 }
 375
 376 static void
 377 intel_viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 378 {
 379     struct intel_context *intel = intel_context(ctx);
 380     __DRIcontext *driContext = intel->driContext;
 381
 382     if (intel->saved_viewport)
 383         intel->saved_viewport(ctx, x, y, w, h);
 384
 385     if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 386        dri2InvalidateDrawable(driContext->driDrawablePriv);
 387        dri2InvalidateDrawable(driContext->driReadablePriv);
 388     }
 389 }
 390
 391 static const struct dri_debug_control debug_control[] = {
 392    { "tex",   DEBUG_TEXTURE},
 393    { "state", DEBUG_STATE},
 394    { "ioctl", DEBUG_IOCTL},
 395    { "blit",  DEBUG_BLIT},
 396    { "mip",   DEBUG_MIPTREE},
 397    { "fall",  DEBUG_FALLBACKS},
 398    { "verb",  DEBUG_VERBOSE},
 399    { "bat",   DEBUG_BATCH},
 400    { "pix",   DEBUG_PIXEL},
 401    { "buf",   DEBUG_BUFMGR},
 402    { "reg",   DEBUG_REGION},
 403    { "fbo",   DEBUG_FBO},
 404    { "gs",    DEBUG_GS},
 405    { "sync",  DEBUG_SYNC},
 406    { "prim",  DEBUG_PRIMS },
 407    { "vert",  DEBUG_VERTS },
 408    { "dri",   DEBUG_DRI },
 409    { "sf",    DEBUG_SF },
 410    { "san",   DEBUG_SANITY },
 411    { "sleep", DEBUG_SLEEP },
 412    { "stats", DEBUG_STATS },
 413    { "tile",  DEBUG_TILE },
 414    { "wm",    DEBUG_WM },
 415    { "urb",   DEBUG_URB },
 416    { "vs",    DEBUG_VS },
 417    { "clip",  DEBUG_CLIP },
 418    { "aub",   DEBUG_AUB },
 419    { NULL,    0 }
 420 };
 421
 422
 423 static void
 424 intelInvalidateState(struct gl_context * ctx, GLuint new_state)
 425 {
 426     struct intel_context *intel = intel_context(ctx);
 427
 428    _swrast_InvalidateState(ctx, new_state);
 429    _vbo_InvalidateState(ctx, new_state);
 430
 431    intel->NewGLState |= new_state;
 432
 433    if (intel->vtbl.invalidate_state)
 434       intel->vtbl.invalidate_state( intel, new_state );
 435 }
 436
 437 void
 438 intel_flush_rendering_to_batch(struct gl_context *ctx)
 439 {
 440    struct intel_context *intel = intel_context(ctx);
 441
 442    if (intel->Fallback)
 443       _swrast_flush(ctx);
 444
 445    if (intel->gen < 4)
 446       INTEL_FIREVERTICES(intel);
 447 }
 448
 449 void
 450 _intel_flush(struct gl_context *ctx, const char *file, int line)
 451 {
 452    struct intel_context *intel = intel_context(ctx);
 453
 454    intel_flush_rendering_to_batch(ctx);
 455
 456    if (intel->batch.used)
 457       _intel_batchbuffer_flush(intel, file, line);
 458 }
 459
 460 static void
 461 intel_glFlush(struct gl_context *ctx)
 462 {
 463    struct intel_context *intel = intel_context(ctx);
 464
 465    intel_flush(ctx);
 466    intel_flush_front(ctx);
 467    if (intel->is_front_buffer_rendering)
 468       intel->need_throttle = true;
 469 }
 470
 471 void
 472 intelFinish(struct gl_context * ctx)
 473 {
 474    struct intel_context *intel = intel_context(ctx);
 475
 476    intel_flush(ctx);
 477    intel_flush_front(ctx);
 478
 479    if (intel->batch.last_bo)
 480       drm_intel_bo_wait_rendering(intel->batch.last_bo);
 481 }
 482
 483 void
 484 intelInitDriverFunctions(struct dd_function_table *functions)
 485 {
 486    _mesa_init_driver_functions(functions);
 487
 488    functions->Flush = intel_glFlush;
 489    functions->Finish = intelFinish;
 490    functions->GetString = intelGetString;
 491    functions->UpdateState = intelInvalidateState;
 492
 493    intelInitTextureFuncs(functions);
 494    intelInitTextureImageFuncs(functions);
 495    intelInitTextureSubImageFuncs(functions);
 496    intelInitTextureCopyImageFuncs(functions);
 497    intelInitStateFuncs(functions);
 498    intelInitClearFuncs(functions);
 499    intelInitBufferFuncs(functions);
 500    intelInitPixelFuncs(functions);
 501    intelInitBufferObjectFuncs(functions);
 502    intel_init_syncobj_functions(functions);
 503 }
 504
 505 bool
 506 intelInitContext(struct intel_context *intel,
 507                  int api,
 508                  const struct gl_config * mesaVis,
 509                  __DRIcontext * driContextPriv,
 510                  void *sharedContextPrivate,
 511                  struct dd_function_table *functions)
 512 {
 513    struct gl_context *ctx = &intel->ctx;
 514    struct gl_context *shareCtx = (struct gl_context *) sharedContextPrivate;
 515    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 516    struct intel_screen *intelScreen = sPriv->driverPrivate;
 517    int bo_reuse_mode;
 518    struct gl_config visual;
 519
 520    /* we can't do anything without a connection to the device */
 521    if (intelScreen->bufmgr == NULL)
 522       return false;
 523
 524    /* Can't rely on invalidate events, fall back to glViewport hack */
 525    if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
 526       intel->saved_viewport = functions->Viewport;
 527       functions->Viewport = intel_viewport;
 528    }
 529
 530    if (mesaVis == NULL) {
 531       memset(&visual, 0, sizeof visual);
 532       mesaVis = &visual;
 533    }
 534
 535    if (!_mesa_initialize_context(&intel->ctx, api, mesaVis, shareCtx,
 536                                  functions, (void *) intel)) {
 537       printf("%s: failed to init mesa context\n", __FUNCTION__);
 538       return false;
 539    }
 540
 541    driContextPriv->driverPrivate = intel;
 542    intel->intelScreen = intelScreen;
 543    intel->driContext = driContextPriv;
 544    intel->driFd = sPriv->fd;
 545
 546    intel->gen = intelScreen->gen;
 547
 548    const int devID = intelScreen->deviceID;
 549    if (IS_SNB_GT1(devID) || IS_IVB_GT1(devID) || IS_HSW_GT1(devID))
 550       intel->gt = 1;
 551    else if (IS_SNB_GT2(devID) || IS_IVB_GT2(devID) || IS_HSW_GT2(devID))
 552       intel->gt = 2;
 553    else
 554       intel->gt = 0;
 555
 556    if (IS_HASWELL(devID)) {
 557       intel->is_haswell = true;
 558    } else if (IS_G4X(devID)) {
 559       intel->is_g4x = true;
 560    } else if (IS_945(devID)) {
 561       intel->is_945 = true;
 562    }
 563
 564    if (intel->gen >= 5) {
 565       intel->needs_ff_sync = true;
 566    }
 567
 568    intel->has_separate_stencil = intel->intelScreen->hw_has_separate_stencil;
 569    intel->must_use_separate_stencil = intel->intelScreen->hw_must_use_separate_stencil;
 570    intel->has_hiz = intel->gen >= 6 && !intel->is_haswell;
 571    intel->has_llc = intel->intelScreen->hw_has_llc;
 572    intel->has_swizzling = intel->intelScreen->hw_has_swizzling;
 573
 574    memset(&ctx->TextureFormatSupported,
 575           0, sizeof(ctx->TextureFormatSupported));
 576
 577    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 578                        sPriv->myNum, (intel->gen >= 4) ? "i965" : "i915");
 579    if (intel->gen < 4)
 580       intel->maxBatchSize = 4096;
 581    else
 582       intel->maxBatchSize = sizeof(intel->batch.map);
 583
 584    intel->bufmgr = intelScreen->bufmgr;
 585
 586    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
 587    switch (bo_reuse_mode) {
 588    case DRI_CONF_BO_REUSE_DISABLED:
 589       break;
 590    case DRI_CONF_BO_REUSE_ALL:
 591       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
 592       break;
 593    }
 594
 595    ctx->Const.MinLineWidth = 1.0;
 596    ctx->Const.MinLineWidthAA = 1.0;
 597    ctx->Const.MaxLineWidth = 5.0;
 598    ctx->Const.MaxLineWidthAA = 5.0;
 599    ctx->Const.LineWidthGranularity = 0.5;
 600
 601    ctx->Const.MinPointSize = 1.0;
 602    ctx->Const.MinPointSizeAA = 1.0;
 603    ctx->Const.MaxPointSize = 255.0;
 604    ctx->Const.MaxPointSizeAA = 3.0;
 605    ctx->Const.PointSizeGranularity = 1.0;
 606
 607    ctx->Const.MaxSamples = 1.0;
 608
 609    if (intel->gen >= 6)
 610       ctx->Const.MaxClipPlanes = 8;
 611
 612    ctx->Const.StripTextureBorder = GL_TRUE;
 613
 614    /* reinitialize the context point state.
 615     * It depend on constants in __struct gl_contextRec::Const
 616     */
 617    _mesa_init_point(ctx);
 618
 619    if (intel->gen >= 4) {
 620       ctx->Const.MaxRenderbufferSize = 8192;
 621    } else {
 622       ctx->Const.MaxRenderbufferSize = 2048;
 623    }
 624
 625    /* Initialize the software rasterizer and helper modules. */
 626    _swrast_CreateContext(ctx);
 627    _vbo_CreateContext(ctx);
 628    _tnl_CreateContext(ctx);
 629    _swsetup_CreateContext(ctx);
 630
 631    /* Configure swrast to match hardware characteristics: */
 632    _swrast_allow_pixel_fog(ctx, false);
 633    _swrast_allow_vertex_fog(ctx, true);
 634
 635    _mesa_meta_init(ctx);
 636
 637    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 638    intel->hw_stipple = 1;
 639
 640    /* XXX FBO: this doesn't seem to be used anywhere */
 641    switch (mesaVis->depthBits) {
 642    case 0:                     /* what to do in this case? */
 643    case 16:
 644       intel->polygon_offset_scale = 1.0;
 645       break;
 646    case 24:
 647       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
 648       break;
 649    default:
 650       assert(0);
 651       break;
 652    }
 653
 654    if (intel->gen >= 4)
 655       intel->polygon_offset_scale /= 0xffff;
 656
 657    intel->RenderIndex = ~0;
 658
 659    intelInitExtensions(ctx);
 660
 661    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 662    if (INTEL_DEBUG & DEBUG_BUFMGR)
 663       dri_bufmgr_set_debug(intel->bufmgr, true);
 664
 665    if (INTEL_DEBUG & DEBUG_AUB)
 666       drm_intel_bufmgr_gem_set_aub_dump(intel->bufmgr, true);
 667
 668    intel_batchbuffer_init(intel);
 669
 670    intel_fbo_init(intel);
 671
 672    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
 673                                                "texture_tiling");
 674    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
 675
 676    if (!driQueryOptionb(&intel->optionCache, "hiz")) {
 677        intel->has_hiz = false;
 678        /* On gen6, you can only do separate stencil with HIZ. */
 679        if (intel->gen == 6)
 680           intel->has_separate_stencil = false;
 681    }
 682
 683    intel->prim.primitive = ~0;
 684
 685    /* Force all software fallbacks */
 686    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 687       fprintf(stderr, "disabling 3D rasterization\n");
 688       intel->no_rast = 1;
 689    }
 690
 691    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
 692       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 693       intel->always_flush_batch = 1;
 694    }
 695
 696    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
 697       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 698       intel->always_flush_cache = 1;
 699    }
 700
 701    return true;
 702 }
 703
 704 void
 705 intelDestroyContext(__DRIcontext * driContextPriv)
 706 {
 707    struct intel_context *intel =
 708       (struct intel_context *) driContextPriv->driverPrivate;
 709
 710    assert(intel);               /* should never be null */
 711    if (intel) {
 712       INTEL_FIREVERTICES(intel);
 713
 714       /* Dump a final BMP in case the application doesn't call SwapBuffers */
 715       if (INTEL_DEBUG & DEBUG_AUB) {
 716          intel_batchbuffer_flush(intel);
 717          aub_dump_bmp(&intel->ctx);
 718       }
 719
 720       _mesa_meta_free(&intel->ctx);
 721
 722       intel->vtbl.destroy(intel);
 723
 724       _swsetup_DestroyContext(&intel->ctx);
 725       _tnl_DestroyContext(&intel->ctx);
 726       _vbo_DestroyContext(&intel->ctx);
 727
 728       _swrast_DestroyContext(&intel->ctx);
 729       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
 730
 731       intel_batchbuffer_free(intel);
 732
 733       free(intel->prim.vb);
 734       intel->prim.vb = NULL;
 735       drm_intel_bo_unreference(intel->prim.vb_bo);
 736       intel->prim.vb_bo = NULL;
 737       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 738       intel->first_post_swapbuffers_batch = NULL;
 739
 740       driDestroyOptionCache(&intel->optionCache);
 741
 742       /* free the Mesa context */
 743       _mesa_free_context_data(&intel->ctx);
 744
 745       _math_matrix_dtr(&intel->ViewportMatrix);
 746
 747       ralloc_free(intel);
 748       driContextPriv->driverPrivate = NULL;
 749    }
 750 }
 751
 752 GLboolean
 753 intelUnbindContext(__DRIcontext * driContextPriv)
 754 {
 755    /* Unset current context and dispath table */
 756    _mesa_make_current(NULL, NULL, NULL);
 757
 758    return true;
 759 }
 760
 761 GLboolean
 762 intelMakeCurrent(__DRIcontext * driContextPriv,
 763                  __DRIdrawable * driDrawPriv,
 764                  __DRIdrawable * driReadPriv)
 765 {
 766    struct intel_context *intel;
 767    GET_CURRENT_CONTEXT(curCtx);
 768
 769    if (driContextPriv)
 770       intel = (struct intel_context *) driContextPriv->driverPrivate;
 771    else
 772       intel = NULL;
 773
 774    /* According to the glXMakeCurrent() man page: "Pending commands to
 775     * the previous context, if any, are flushed before it is released."
 776     * But only flush if we're actually changing contexts.
 777     */
 778    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
 779       _mesa_flush(curCtx);
 780    }
 781
 782    if (driContextPriv) {
 783       struct gl_framebuffer *fb, *readFb;
 784
 785       if (driDrawPriv == NULL && driReadPriv == NULL) {
 786          fb = _mesa_get_incomplete_framebuffer();
 787          readFb = _mesa_get_incomplete_framebuffer();
 788       } else {
 789          fb = driDrawPriv->driverPrivate;
 790          readFb = driReadPriv->driverPrivate;
 791          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 792          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 793       }
 794
 795       intel_prepare_render(intel);
 796       _mesa_make_current(&intel->ctx, fb, readFb);
 797
 798       /* We do this in intel_prepare_render() too, but intel->ctx.DrawBuffer
 799        * is NULL at that point.  We can't call _mesa_makecurrent()
 800        * first, since we need the buffer size for the initial
 801        * viewport.  So just call intel_draw_buffer() again here. */
 802       intel_draw_buffer(&intel->ctx);
 803    }
 804    else {
 805       _mesa_make_current(NULL, NULL, NULL);
 806    }
 807
 808    return true;
 809 }
 810
 811 /**
 812  * \brief Query DRI2 to obtain a DRIdrawable's buffers.
 813  *
 814  * To determine which DRI buffers to request, examine the renderbuffers
 815  * attached to the drawable's framebuffer. Then request the buffers with
 816  * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
 817  *
 818  * This is called from intel_update_renderbuffers().
 819  *
 820  * \param drawable      Drawable whose buffers are queried.
 821  * \param buffers       [out] List of buffers returned by DRI2 query.
 822  * \param buffer_count  [out] Number of buffers returned.
 823  *
 824  * \see intel_update_renderbuffers()
 825  * \see DRI2GetBuffers()
 826  * \see DRI2GetBuffersWithFormat()
 827  */
 828 static void
 829 intel_query_dri2_buffers(struct intel_context *intel,
 830                          __DRIdrawable *drawable,
 831                          __DRIbuffer **buffers,
 832                          int *buffer_count)
 833 {
 834    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
 835    struct gl_framebuffer *fb = drawable->driverPrivate;
 836    int i = 0;
 837    const int max_attachments = 4;
 838    unsigned *attachments = calloc(2 * max_attachments, sizeof(unsigned));
 839
 840    struct intel_renderbuffer *front_rb;
 841    struct intel_renderbuffer *back_rb;
 842
 843    front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 844    back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 845
 846    if ((intel->is_front_buffer_rendering ||
 847         intel->is_front_buffer_reading ||
 848         !back_rb) && front_rb) {
 849       attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 850       attachments[i++] = intel_bits_per_pixel(front_rb);
 851    }
 852
 853    if (back_rb) {
 854       attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 855       attachments[i++] = intel_bits_per_pixel(back_rb);
 856    }
 857
 858    assert(i <= 2 * max_attachments);
 859
 860    *buffers = screen->dri2.loader->getBuffersWithFormat(drawable,
 861                                                         &drawable->w,
 862                                                         &drawable->h,
 863                                                         attachments, i / 2,
 864                                                         buffer_count,
 865                                                         drawable->loaderPrivate);
 866    free(attachments);
 867 }
 868
 869 /**
 870  * \brief Assign a DRI buffer's DRM region to a renderbuffer.
 871  *
 872  * This is called from intel_update_renderbuffers().
 873  *
 874  * \par Note:
 875  *    DRI buffers whose attachment point is DRI2BufferStencil or
 876  *    DRI2BufferDepthStencil are handled as special cases.
 877  *
 878  * \param buffer_name is a human readable name, such as "dri2 front buffer",
 879  *        that is passed to intel_region_alloc_for_handle().
 880  *
 881  * \see intel_update_renderbuffers()
 882  * \see intel_region_alloc_for_handle()
 883  */
 884 static void
 885 intel_process_dri2_buffer(struct intel_context *intel,
 886                           __DRIdrawable *drawable,
 887                           __DRIbuffer *buffer,
 888                           struct intel_renderbuffer *rb,
 889                           const char *buffer_name)
 890 {
 891    struct intel_region *region = NULL;
 892
 893    if (!rb)
 894       return;
 895
 896    /* We try to avoid closing and reopening the same BO name, because the first
 897     * use of a mapping of the buffer involves a bunch of page faulting which is
 898     * moderately expensive.
 899     */
 900    if (rb->mt &&
 901        rb->mt->region &&
 902        rb->mt->region->name == buffer->name)
 903       return;
 904
 905    if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 906       fprintf(stderr,
 907               "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 908               buffer->name, buffer->attachment,
 909               buffer->cpp, buffer->pitch);
 910    }
 911
 912    intel_miptree_release(&rb->mt);
 913    region = intel_region_alloc_for_handle(intel->intelScreen,
 914                                           buffer->cpp,
 915                                           drawable->w,
 916                                           drawable->h,
 917                                           buffer->pitch / buffer->cpp,
 918                                           buffer->name,
 919                                           buffer_name);
 920    if (!region)
 921       return;
 922
 923    rb->mt = intel_miptree_create_for_region(intel,
 924                                             GL_TEXTURE_2D,
 925                                             intel_rb_format(rb),
 926                                             region);
 927    intel_region_release(&region);
 928 }