src/mesa/drivers/dri/i965/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/renderbuffer.h"
  36
  37 #include "swrast/swrast.h"
  38 #include "swrast_setup/swrast_setup.h"
  39 #include "tnl/tnl.h"
  40 #include "drivers/common/driverfuncs.h"
  41 #include "drivers/common/meta.h"
  42
  43 #include "intel_chipset.h"
  44 #include "intel_buffers.h"
  45 #include "intel_tex.h"
  46 #include "intel_batchbuffer.h"
  47 #include "intel_pixel.h"
  48 #include "intel_regions.h"
  49 #include "intel_buffer_objects.h"
  50 #include "intel_fbo.h"
  51 #include "intel_bufmgr.h"
  52 #include "intel_screen.h"
  53 #include "intel_mipmap_tree.h"
  54
  55 #include "utils.h"
  56 #include "../glsl/ralloc.h"
  57
  58 #ifndef INTEL_DEBUG
  59 int INTEL_DEBUG = (0);
  60 #endif
  61
  62
  63 static const GLubyte *
  64 intelGetString(struct gl_context * ctx, GLenum name)
  65 {
  66    const struct intel_context *const intel = intel_context(ctx);
  67    const char *chipset;
  68    static char buffer[128];
  69
  70    switch (name) {
  71    case GL_VENDOR:
  72       return (GLubyte *) "Intel Open Source Technology Center";
  73       break;
  74
  75    case GL_RENDERER:
  76       switch (intel->intelScreen->deviceID) {
  77 #undef CHIPSET
  78 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
  79 #include "pci_ids/i965_pci_ids.h"
  80       default:
  81          chipset = "Unknown Intel Chipset";
  82          break;
  83       }
  84
  85       (void) driGetRendererString(buffer, chipset, 0);
  86       return (GLubyte *) buffer;
  87
  88    default:
  89       return NULL;
  90    }
  91 }
  92
  93 void
  94 intel_resolve_for_dri2_flush(struct brw_context *brw,
  95                              __DRIdrawable *drawable)
  96 {
  97    struct intel_context *intel = &brw->intel;
  98    if (intel->gen < 6) {
  99       /* MSAA and fast color clear are not supported, so don't waste time
 100        * checking whether a resolve is needed.
 101        */
 102       return;
 103    }
 104
 105    struct gl_framebuffer *fb = drawable->driverPrivate;
 106    struct intel_renderbuffer *rb;
 107
 108    /* Usually, only the back buffer will need to be downsampled. However,
 109     * the front buffer will also need it if the user has rendered into it.
 110     */
 111    static const gl_buffer_index buffers[2] = {
 112          BUFFER_BACK_LEFT,
 113          BUFFER_FRONT_LEFT,
 114    };
 115
 116    for (int i = 0; i < 2; ++i) {
 117       rb = intel_get_renderbuffer(fb, buffers[i]);
 118       if (rb == NULL || rb->mt == NULL)
 119          continue;
 120       if (rb->mt->num_samples <= 1)
 121          intel_miptree_resolve_color(brw, rb->mt);
 122       else
 123          intel_miptree_downsample(brw, rb->mt);
 124    }
 125 }
 126
 127 static void
 128 intel_flush_front(struct gl_context *ctx)
 129 {
 130    struct brw_context *brw = brw_context(ctx);
 131    struct intel_context *intel = intel_context(ctx);
 132     __DRIcontext *driContext = intel->driContext;
 133     __DRIdrawable *driDrawable = driContext->driDrawablePriv;
 134     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 135
 136     if (brw->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 137       if (screen->dri2.loader->flushFrontBuffer != NULL &&
 138           driDrawable &&
 139           driDrawable->loaderPrivate) {
 140
 141          /* Resolve before flushing FAKE_FRONT_LEFT to FRONT_LEFT.
 142           *
 143           * This potentially resolves both front and back buffer. It
 144           * is unnecessary to resolve the back, but harms nothing except
 145           * performance. And no one cares about front-buffer render
 146           * performance.
 147           */
 148          intel_resolve_for_dri2_flush(brw, driDrawable);
 149
 150          screen->dri2.loader->flushFrontBuffer(driDrawable,
 151                                                driDrawable->loaderPrivate);
 152
 153          /* We set the dirty bit in intel_prepare_render() if we're
 154           * front buffer rendering once we get there.
 155           */
 156          brw->front_buffer_dirty = false;
 157       }
 158    }
 159 }
 160
 161 static unsigned
 162 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
 163 {
 164    return _mesa_get_format_bytes(intel_rb_format(rb)) * 8;
 165 }
 166
 167 static void
 168 intel_query_dri2_buffers(struct brw_context *brw,
 169                          __DRIdrawable *drawable,
 170                          __DRIbuffer **buffers,
 171                          int *count);
 172
 173 static void
 174 intel_process_dri2_buffer(struct brw_context *brw,
 175                           __DRIdrawable *drawable,
 176                           __DRIbuffer *buffer,
 177                           struct intel_renderbuffer *rb,
 178                           const char *buffer_name);
 179
 180 void
 181 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
 182 {
 183    struct gl_framebuffer *fb = drawable->driverPrivate;
 184    struct intel_renderbuffer *rb;
 185    struct brw_context *brw = context->driverPrivate;
 186    struct intel_context *intel = &brw->intel;
 187    __DRIbuffer *buffers = NULL;
 188    int i, count;
 189    const char *region_name;
 190
 191    /* Set this up front, so that in case our buffers get invalidated
 192     * while we're getting new buffers, we don't clobber the stamp and
 193     * thus ignore the invalidate. */
 194    drawable->lastStamp = drawable->dri2.stamp;
 195
 196    if (unlikely(INTEL_DEBUG & DEBUG_DRI))
 197       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 198
 199    intel_query_dri2_buffers(brw, drawable, &buffers, &count);
 200
 201    if (buffers == NULL)
 202       return;
 203
 204    for (i = 0; i < count; i++) {
 205        switch (buffers[i].attachment) {
 206        case __DRI_BUFFER_FRONT_LEFT:
 207            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 208            region_name = "dri2 front buffer";
 209            break;
 210
 211        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 212            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 213            region_name = "dri2 fake front buffer";
 214            break;
 215
 216        case __DRI_BUFFER_BACK_LEFT:
 217            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 218            region_name = "dri2 back buffer";
 219            break;
 220
 221        case __DRI_BUFFER_DEPTH:
 222        case __DRI_BUFFER_HIZ:
 223        case __DRI_BUFFER_DEPTH_STENCIL:
 224        case __DRI_BUFFER_STENCIL:
 225        case __DRI_BUFFER_ACCUM:
 226        default:
 227            fprintf(stderr,
 228                    "unhandled buffer attach event, attachment type %d\n",
 229                    buffers[i].attachment);
 230            return;
 231        }
 232
 233        intel_process_dri2_buffer(brw, drawable, &buffers[i], rb, region_name);
 234    }
 235
 236    driUpdateFramebufferSize(&intel->ctx, drawable);
 237 }
 238
 239 /**
 240  * intel_prepare_render should be called anywhere that curent read/drawbuffer
 241  * state is required.
 242  */
 243 void
 244 intel_prepare_render(struct brw_context *brw)
 245 {
 246    struct intel_context *intel = &brw->intel;
 247    __DRIcontext *driContext = intel->driContext;
 248    __DRIdrawable *drawable;
 249
 250    drawable = driContext->driDrawablePriv;
 251    if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
 252       if (drawable->lastStamp != drawable->dri2.stamp)
 253          intel_update_renderbuffers(driContext, drawable);
 254       driContext->dri2.draw_stamp = drawable->dri2.stamp;
 255    }
 256
 257    drawable = driContext->driReadablePriv;
 258    if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
 259       if (drawable->lastStamp != drawable->dri2.stamp)
 260          intel_update_renderbuffers(driContext, drawable);
 261       driContext->dri2.read_stamp = drawable->dri2.stamp;
 262    }
 263
 264    /* If we're currently rendering to the front buffer, the rendering
 265     * that will happen next will probably dirty the front buffer.  So
 266     * mark it as dirty here.
 267     */
 268    if (brw->is_front_buffer_rendering)
 269       brw->front_buffer_dirty = true;
 270
 271    /* Wait for the swapbuffers before the one we just emitted, so we
 272     * don't get too many swaps outstanding for apps that are GPU-heavy
 273     * but not CPU-heavy.
 274     *
 275     * We're using intelDRI2Flush (called from the loader before
 276     * swapbuffer) and glFlush (for front buffer rendering) as the
 277     * indicator that a frame is done and then throttle when we get
 278     * here as we prepare to render the next frame.  At this point for
 279     * round trips for swap/copy and getting new buffers are done and
 280     * we'll spend less time waiting on the GPU.
 281     *
 282     * Unfortunately, we don't have a handle to the batch containing
 283     * the swap, and getting our hands on that doesn't seem worth it,
 284     * so we just us the first batch we emitted after the last swap.
 285     */
 286    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
 287       if (!brw->disable_throttling)
 288          drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
 289       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 290       intel->first_post_swapbuffers_batch = NULL;
 291       intel->need_throttle = false;
 292    }
 293 }
 294
 295 static const struct dri_debug_control debug_control[] = {
 296    { "tex",   DEBUG_TEXTURE},
 297    { "state", DEBUG_STATE},
 298    { "ioctl", DEBUG_IOCTL},
 299    { "blit",  DEBUG_BLIT},
 300    { "mip",   DEBUG_MIPTREE},
 301    { "fall",  DEBUG_PERF},
 302    { "perf",  DEBUG_PERF},
 303    { "bat",   DEBUG_BATCH},
 304    { "pix",   DEBUG_PIXEL},
 305    { "buf",   DEBUG_BUFMGR},
 306    { "reg",   DEBUG_REGION},
 307    { "fbo",   DEBUG_FBO},
 308    { "fs",    DEBUG_WM },
 309    { "gs",    DEBUG_GS},
 310    { "sync",  DEBUG_SYNC},
 311    { "prim",  DEBUG_PRIMS },
 312    { "vert",  DEBUG_VERTS },
 313    { "dri",   DEBUG_DRI },
 314    { "sf",    DEBUG_SF },
 315    { "stats", DEBUG_STATS },
 316    { "wm",    DEBUG_WM },
 317    { "urb",   DEBUG_URB },
 318    { "vs",    DEBUG_VS },
 319    { "clip",  DEBUG_CLIP },
 320    { "aub",   DEBUG_AUB },
 321    { "shader_time", DEBUG_SHADER_TIME },
 322    { "no16",  DEBUG_NO16 },
 323    { "blorp", DEBUG_BLORP },
 324    { NULL,    0 }
 325 };
 326
 327
 328 static void
 329 intelInvalidateState(struct gl_context * ctx, GLuint new_state)
 330 {
 331     struct intel_context *intel = intel_context(ctx);
 332
 333     if (ctx->swrast_context)
 334        _swrast_InvalidateState(ctx, new_state);
 335    _vbo_InvalidateState(ctx, new_state);
 336
 337    intel->NewGLState |= new_state;
 338 }
 339
 340 void
 341 _intel_flush(struct gl_context *ctx, const char *file, int line)
 342 {
 343    struct brw_context *brw = brw_context(ctx);
 344    struct intel_context *intel = intel_context(ctx);
 345
 346    if (intel->batch.used)
 347       _intel_batchbuffer_flush(brw, file, line);
 348 }
 349
 350 static void
 351 intel_glFlush(struct gl_context *ctx)
 352 {
 353    struct brw_context *brw = brw_context(ctx);
 354    struct intel_context *intel = intel_context(ctx);
 355
 356    intel_flush(ctx);
 357    intel_flush_front(ctx);
 358    if (brw->is_front_buffer_rendering)
 359       intel->need_throttle = true;
 360 }
 361
 362 void
 363 intelFinish(struct gl_context * ctx)
 364 {
 365    struct intel_context *intel = intel_context(ctx);
 366
 367    intel_flush(ctx);
 368    intel_flush_front(ctx);
 369
 370    if (intel->batch.last_bo)
 371       drm_intel_bo_wait_rendering(intel->batch.last_bo);
 372 }
 373
 374 void
 375 intelInitDriverFunctions(struct dd_function_table *functions)
 376 {
 377    _mesa_init_driver_functions(functions);
 378
 379    functions->Flush = intel_glFlush;
 380    functions->Finish = intelFinish;
 381    functions->GetString = intelGetString;
 382    functions->UpdateState = intelInvalidateState;
 383
 384    intelInitTextureFuncs(functions);
 385    intelInitTextureImageFuncs(functions);
 386    intelInitTextureSubImageFuncs(functions);
 387    intelInitTextureCopyImageFuncs(functions);
 388    intelInitClearFuncs(functions);
 389    intelInitBufferFuncs(functions);
 390    intelInitPixelFuncs(functions);
 391    intelInitBufferObjectFuncs(functions);
 392    intel_init_syncobj_functions(functions);
 393 }
 394
 395 static bool
 396 validate_context_version(struct intel_screen *screen,
 397                          int mesa_api,
 398                          unsigned major_version,
 399                          unsigned minor_version,
 400                          unsigned *dri_ctx_error)
 401 {
 402    unsigned req_version = 10 * major_version + minor_version;
 403    unsigned max_version = 0;
 404
 405    switch (mesa_api) {
 406    case API_OPENGL_COMPAT:
 407       max_version = screen->max_gl_compat_version;
 408       break;
 409    case API_OPENGL_CORE:
 410       max_version = screen->max_gl_core_version;
 411       break;
 412    case API_OPENGLES:
 413       max_version = screen->max_gl_es1_version;
 414       break;
 415    case API_OPENGLES2:
 416       max_version = screen->max_gl_es2_version;
 417       break;
 418    default:
 419       max_version = 0;
 420       break;
 421    }
 422
 423    if (max_version == 0) {
 424       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 425       return false;
 426    } else if (req_version > max_version) {
 427       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 428       return false;
 429    }
 430
 431    return true;
 432 }
 433
 434 bool
 435 intelInitContext(struct brw_context *brw,
 436                  int api,
 437                  unsigned major_version,
 438                  unsigned minor_version,
 439                  const struct gl_config * mesaVis,
 440                  __DRIcontext * driContextPriv,
 441                  void *sharedContextPrivate,
 442                  struct dd_function_table *functions,
 443                  unsigned *dri_ctx_error)
 444 {
 445    struct intel_context *intel = &brw->intel;
 446    struct gl_context *ctx = &intel->ctx;
 447    struct gl_context *shareCtx = (struct gl_context *) sharedContextPrivate;
 448    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 449    struct intel_screen *intelScreen = sPriv->driverPrivate;
 450    int bo_reuse_mode;
 451    struct gl_config visual;
 452
 453    /* we can't do anything without a connection to the device */
 454    if (intelScreen->bufmgr == NULL) {
 455       *dri_ctx_error = __DRI_CTX_ERROR_NO_MEMORY;
 456       return false;
 457    }
 458
 459    if (!validate_context_version(intelScreen,
 460                                  api, major_version, minor_version,
 461                                  dri_ctx_error))
 462       return false;
 463
 464    if (mesaVis == NULL) {
 465       memset(&visual, 0, sizeof visual);
 466       mesaVis = &visual;
 467    }
 468
 469    intel->intelScreen = intelScreen;
 470
 471    if (!_mesa_initialize_context(&intel->ctx, api, mesaVis, shareCtx,
 472                                  functions)) {
 473       *dri_ctx_error = __DRI_CTX_ERROR_NO_MEMORY;
 474       printf("%s: failed to init mesa context\n", __FUNCTION__);
 475       return false;
 476    }
 477
 478    driContextPriv->driverPrivate = intel;
 479    intel->driContext = driContextPriv;
 480    intel->driFd = sPriv->fd;
 481
 482    intel->gen = intelScreen->gen;
 483
 484    const int devID = intelScreen->deviceID;
 485    if (IS_SNB_GT1(devID) || IS_IVB_GT1(devID) || IS_HSW_GT1(devID))
 486       intel->gt = 1;
 487    else if (IS_SNB_GT2(devID) || IS_IVB_GT2(devID) || IS_HSW_GT2(devID))
 488       intel->gt = 2;
 489    else if (IS_HSW_GT3(devID))
 490       intel->gt = 3;
 491    else
 492       intel->gt = 0;
 493
 494    if (IS_HASWELL(devID)) {
 495       intel->is_haswell = true;
 496    } else if (IS_BAYTRAIL(devID)) {
 497       intel->is_baytrail = true;
 498       intel->gt = 1;
 499    } else if (IS_G4X(devID)) {
 500       intel->is_g4x = true;
 501    }
 502
 503    intel->has_separate_stencil = intel->intelScreen->hw_has_separate_stencil;
 504    intel->must_use_separate_stencil = intel->intelScreen->hw_must_use_separate_stencil;
 505    intel->has_hiz = intel->gen >= 6;
 506    intel->has_llc = intel->intelScreen->hw_has_llc;
 507    intel->has_swizzling = intel->intelScreen->hw_has_swizzling;
 508
 509    memset(&ctx->TextureFormatSupported,
 510           0, sizeof(ctx->TextureFormatSupported));
 511
 512    driParseConfigFiles(&brw->optionCache, &intelScreen->optionCache,
 513                        sPriv->myNum, "i965");
 514
 515    /* Estimate the size of the mappable aperture into the GTT.  There's an
 516     * ioctl to get the whole GTT size, but not one to get the mappable subset.
 517     * It turns out it's basically always 256MB, though some ancient hardware
 518     * was smaller.
 519     */
 520    uint32_t gtt_size = 256 * 1024 * 1024;
 521
 522    /* We don't want to map two objects such that a memcpy between them would
 523     * just fault one mapping in and then the other over and over forever.  So
 524     * we would need to divide the GTT size by 2.  Additionally, some GTT is
 525     * taken up by things like the framebuffer and the ringbuffer and such, so
 526     * be more conservative.
 527     */
 528    intel->max_gtt_map_object_size = gtt_size / 4;
 529
 530    brw->bufmgr = intelScreen->bufmgr;
 531
 532    bo_reuse_mode = driQueryOptioni(&brw->optionCache, "bo_reuse");
 533    switch (bo_reuse_mode) {
 534    case DRI_CONF_BO_REUSE_DISABLED:
 535       break;
 536    case DRI_CONF_BO_REUSE_ALL:
 537       intel_bufmgr_gem_enable_reuse(brw->bufmgr);
 538       break;
 539    }
 540
 541    /* Initialize the software rasterizer and helper modules.
 542     *
 543     * As of GL 3.1 core, the gen4+ driver doesn't need the swrast context for
 544     * software fallbacks (which we have to support on legacy GL to do weird
 545     * glDrawPixels(), glBitmap(), and other functions).
 546     */
 547    if (api != API_OPENGL_CORE) {
 548       _swrast_CreateContext(ctx);
 549    }
 550
 551    _vbo_CreateContext(ctx);
 552    if (ctx->swrast_context) {
 553       _tnl_CreateContext(ctx);
 554       _swsetup_CreateContext(ctx);
 555
 556       /* Configure swrast to match hardware characteristics: */
 557       _swrast_allow_pixel_fog(ctx, false);
 558       _swrast_allow_vertex_fog(ctx, true);
 559    }
 560
 561    _mesa_meta_init(ctx);
 562
 563    intelInitExtensions(ctx);
 564
 565    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 566    if (INTEL_DEBUG & DEBUG_BUFMGR)
 567       dri_bufmgr_set_debug(brw->bufmgr, true);
 568    if ((INTEL_DEBUG & DEBUG_SHADER_TIME) && intel->gen < 7) {
 569       fprintf(stderr,
 570               "shader_time debugging requires gen7 (Ivybridge) or better.\n");
 571       INTEL_DEBUG &= ~DEBUG_SHADER_TIME;
 572    }
 573    if (INTEL_DEBUG & DEBUG_PERF)
 574       intel->perf_debug = true;
 575
 576    if (INTEL_DEBUG & DEBUG_AUB)
 577       drm_intel_bufmgr_gem_set_aub_dump(brw->bufmgr, true);
 578
 579    intel_batchbuffer_init(brw);
 580
 581    intel_fbo_init(brw);
 582
 583    if (!driQueryOptionb(&brw->optionCache, "hiz")) {
 584        intel->has_hiz = false;
 585        /* On gen6, you can only do separate stencil with HIZ. */
 586        if (intel->gen == 6)
 587           intel->has_separate_stencil = false;
 588    }
 589
 590    if (driQueryOptionb(&brw->optionCache, "always_flush_batch")) {
 591       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 592       brw->always_flush_batch = 1;
 593    }
 594
 595    if (driQueryOptionb(&brw->optionCache, "always_flush_cache")) {
 596       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 597       brw->always_flush_cache = 1;
 598    }
 599
 600    if (driQueryOptionb(&brw->optionCache, "disable_throttling")) {
 601       fprintf(stderr, "disabling flush throttling\n");
 602       brw->disable_throttling = 1;
 603    }
 604
 605    return true;
 606 }
 607
 608 void
 609 intelDestroyContext(__DRIcontext * driContextPriv)
 610 {
 611    struct brw_context *brw =
 612       (struct brw_context *) driContextPriv->driverPrivate;
 613    struct intel_context *intel = &brw->intel;
 614    struct gl_context *ctx = &intel->ctx;
 615
 616    assert(intel);               /* should never be null */
 617    if (intel) {
 618       /* Dump a final BMP in case the application doesn't call SwapBuffers */
 619       if (INTEL_DEBUG & DEBUG_AUB) {
 620          intel_batchbuffer_flush(brw);
 621          aub_dump_bmp(&intel->ctx);
 622       }
 623
 624       _mesa_meta_free(&intel->ctx);
 625
 626       brw->vtbl.destroy(brw);
 627
 628       if (ctx->swrast_context) {
 629          _swsetup_DestroyContext(&intel->ctx);
 630          _tnl_DestroyContext(&intel->ctx);
 631       }
 632       _vbo_DestroyContext(&intel->ctx);
 633
 634       if (ctx->swrast_context)
 635          _swrast_DestroyContext(&intel->ctx);
 636
 637       intel_batchbuffer_free(brw);
 638
 639       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 640       intel->first_post_swapbuffers_batch = NULL;
 641
 642       driDestroyOptionCache(&brw->optionCache);
 643
 644       /* free the Mesa context */
 645       _mesa_free_context_data(&intel->ctx);
 646
 647       ralloc_free(intel);
 648       driContextPriv->driverPrivate = NULL;
 649    }
 650 }
 651
 652 GLboolean
 653 intelUnbindContext(__DRIcontext * driContextPriv)
 654 {
 655    /* Unset current context and dispath table */
 656    _mesa_make_current(NULL, NULL, NULL);
 657
 658    return true;
 659 }
 660
 661 /**
 662  * Fixes up the context for GLES23 with our default-to-sRGB-capable behavior
 663  * on window system framebuffers.
 664  *
 665  * Desktop GL is fairly reasonable in its handling of sRGB: You can ask if
 666  * your renderbuffer can do sRGB encode, and you can flip a switch that does
 667  * sRGB encode if the renderbuffer can handle it.  You can ask specifically
 668  * for a visual where you're guaranteed to be capable, but it turns out that
 669  * everyone just makes all their ARGB8888 visuals capable and doesn't offer
 670  * incapable ones, becuase there's no difference between the two in resources
 671  * used.  Applications thus get built that accidentally rely on the default
 672  * visual choice being sRGB, so we make ours sRGB capable.  Everything sounds
 673  * great...
 674  *
 675  * But for GLES2/3, they decided that it was silly to not turn on sRGB encode
 676  * for sRGB renderbuffers you made with the GL_EXT_texture_sRGB equivalent.
 677  * So they removed the enable knob and made it "if the renderbuffer is sRGB
 678  * capable, do sRGB encode".  Then, for your window system renderbuffers, you
 679  * can ask for sRGB visuals and get sRGB encode, or not ask for sRGB visuals
 680  * and get no sRGB encode (assuming that both kinds of visual are available).
 681  * Thus our choice to support sRGB by default on our visuals for desktop would
 682  * result in broken rendering of GLES apps that aren't expecting sRGB encode.
 683  *
 684  * Unfortunately, renderbuffer setup happens before a context is created.  So
 685  * in intel_screen.c we always set up sRGB, and here, if you're a GLES2/3
 686  * context (without an sRGB visual, though we don't have sRGB visuals exposed
 687  * yet), we go turn that back off before anyone finds out.
 688  */
 689 static void
 690 intel_gles3_srgb_workaround(struct brw_context *brw,
 691                             struct gl_framebuffer *fb)
 692 {
 693    struct intel_context *intel = &brw->intel;
 694    struct gl_context *ctx = &intel->ctx;
 695
 696    if (_mesa_is_desktop_gl(ctx) || !fb->Visual.sRGBCapable)
 697       return;
 698
 699    /* Some day when we support the sRGB capable bit on visuals available for
 700     * GLES, we'll need to respect that and not disable things here.
 701     */
 702    fb->Visual.sRGBCapable = false;
 703    for (int i = 0; i < BUFFER_COUNT; i++) {
 704       if (fb->Attachment[i].Renderbuffer &&
 705           fb->Attachment[i].Renderbuffer->Format == MESA_FORMAT_SARGB8) {
 706          fb->Attachment[i].Renderbuffer->Format = MESA_FORMAT_ARGB8888;
 707       }
 708    }
 709 }
 710
 711 GLboolean
 712 intelMakeCurrent(__DRIcontext * driContextPriv,
 713                  __DRIdrawable * driDrawPriv,
 714                  __DRIdrawable * driReadPriv)
 715 {
 716    struct brw_context *brw;
 717    GET_CURRENT_CONTEXT(curCtx);
 718
 719    if (driContextPriv)
 720       brw = (struct brw_context *) driContextPriv->driverPrivate;
 721    else
 722       brw = NULL;
 723
 724    /* According to the glXMakeCurrent() man page: "Pending commands to
 725     * the previous context, if any, are flushed before it is released."
 726     * But only flush if we're actually changing contexts.
 727     */
 728    if (brw_context(curCtx) && brw_context(curCtx) != brw) {
 729       _mesa_flush(curCtx);
 730    }
 731
 732    struct intel_context *intel = &brw->intel;
 733
 734    if (driContextPriv) {
 735       struct gl_context *ctx = &intel->ctx;
 736       struct gl_framebuffer *fb, *readFb;
 737
 738       if (driDrawPriv == NULL && driReadPriv == NULL) {
 739          fb = _mesa_get_incomplete_framebuffer();
 740          readFb = _mesa_get_incomplete_framebuffer();
 741       } else {
 742          fb = driDrawPriv->driverPrivate;
 743          readFb = driReadPriv->driverPrivate;
 744          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 745          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 746       }
 747
 748       intel_prepare_render(brw);
 749       _mesa_make_current(ctx, fb, readFb);
 750
 751       intel_gles3_srgb_workaround(brw, ctx->WinSysDrawBuffer);
 752       intel_gles3_srgb_workaround(brw, ctx->WinSysReadBuffer);
 753    }
 754    else {
 755       _mesa_make_current(NULL, NULL, NULL);
 756    }
 757
 758    return true;
 759 }
 760
 761 /**
 762  * \brief Query DRI2 to obtain a DRIdrawable's buffers.
 763  *
 764  * To determine which DRI buffers to request, examine the renderbuffers
 765  * attached to the drawable's framebuffer. Then request the buffers with
 766  * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
 767  *
 768  * This is called from intel_update_renderbuffers().
 769  *
 770  * \param drawable      Drawable whose buffers are queried.
 771  * \param buffers       [out] List of buffers returned by DRI2 query.
 772  * \param buffer_count  [out] Number of buffers returned.
 773  *
 774  * \see intel_update_renderbuffers()
 775  * \see DRI2GetBuffers()
 776  * \see DRI2GetBuffersWithFormat()
 777  */
 778 static void
 779 intel_query_dri2_buffers(struct brw_context *brw,
 780                          __DRIdrawable *drawable,
 781                          __DRIbuffer **buffers,
 782                          int *buffer_count)
 783 {
 784    struct intel_context *intel = &brw->intel;
 785    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
 786    struct gl_framebuffer *fb = drawable->driverPrivate;
 787    int i = 0;
 788    unsigned attachments[8];
 789
 790    struct intel_renderbuffer *front_rb;
 791    struct intel_renderbuffer *back_rb;
 792
 793    front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 794    back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 795
 796    memset(attachments, 0, sizeof(attachments));
 797    if ((brw->is_front_buffer_rendering ||
 798         brw->is_front_buffer_reading ||
 799         !back_rb) && front_rb) {
 800       /* If a fake front buffer is in use, then querying for
 801        * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
 802        * the real front buffer to the fake front buffer.  So before doing the
 803        * query, we need to make sure all the pending drawing has landed in the
 804        * real front buffer.
 805        */
 806       intel_flush(&intel->ctx);
 807       intel_flush_front(&intel->ctx);
 808
 809       attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 810       attachments[i++] = intel_bits_per_pixel(front_rb);
 811    } else if (front_rb && brw->front_buffer_dirty) {
 812       /* We have pending front buffer rendering, but we aren't querying for a
 813        * front buffer.  If the front buffer we have is a fake front buffer,
 814        * the X server is going to throw it away when it processes the query.
 815        * So before doing the query, make sure all the pending drawing has
 816        * landed in the real front buffer.
 817        */
 818       intel_flush(&intel->ctx);
 819       intel_flush_front(&intel->ctx);
 820    }
 821
 822    if (back_rb) {
 823       attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 824       attachments[i++] = intel_bits_per_pixel(back_rb);
 825    }
 826
 827    assert(i <= ARRAY_SIZE(attachments));
 828
 829    *buffers = screen->dri2.loader->getBuffersWithFormat(drawable,
 830                                                         &drawable->w,
 831                                                         &drawable->h,
 832                                                         attachments, i / 2,
 833                                                         buffer_count,
 834                                                         drawable->loaderPrivate);
 835 }
 836
 837 /**
 838  * \brief Assign a DRI buffer's DRM region to a renderbuffer.
 839  *
 840  * This is called from intel_update_renderbuffers().
 841  *
 842  * \par Note:
 843  *    DRI buffers whose attachment point is DRI2BufferStencil or
 844  *    DRI2BufferDepthStencil are handled as special cases.
 845  *
 846  * \param buffer_name is a human readable name, such as "dri2 front buffer",
 847  *        that is passed to intel_region_alloc_for_handle().
 848  *
 849  * \see intel_update_renderbuffers()
 850  * \see intel_region_alloc_for_handle()
 851  */
 852 static void
 853 intel_process_dri2_buffer(struct brw_context *brw,
 854                           __DRIdrawable *drawable,
 855                           __DRIbuffer *buffer,
 856                           struct intel_renderbuffer *rb,
 857                           const char *buffer_name)
 858 {
 859    struct intel_context *intel = &brw->intel;
 860    struct intel_region *region = NULL;
 861
 862    if (!rb)
 863       return;
 864
 865    unsigned num_samples = rb->Base.Base.NumSamples;
 866
 867    /* We try to avoid closing and reopening the same BO name, because the first
 868     * use of a mapping of the buffer involves a bunch of page faulting which is
 869     * moderately expensive.
 870     */
 871    if (num_samples == 0) {
 872        if (rb->mt &&
 873            rb->mt->region &&
 874            rb->mt->region->name == buffer->name)
 875           return;
 876    } else {
 877        if (rb->mt &&
 878            rb->mt->singlesample_mt &&
 879            rb->mt->singlesample_mt->region &&
 880            rb->mt->singlesample_mt->region->name == buffer->name)
 881           return;
 882    }
 883
 884    if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 885       fprintf(stderr,
 886               "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 887               buffer->name, buffer->attachment,
 888               buffer->cpp, buffer->pitch);
 889    }
 890
 891    intel_miptree_release(&rb->mt);
 892    region = intel_region_alloc_for_handle(intel->intelScreen,
 893                                           buffer->cpp,
 894                                           drawable->w,
 895                                           drawable->h,
 896                                           buffer->pitch,
 897                                           buffer->name,
 898                                           buffer_name);
 899    if (!region)
 900       return;
 901
 902    rb->mt = intel_miptree_create_for_dri2_buffer(brw,
 903                                                  buffer->attachment,
 904                                                  intel_rb_format(rb),
 905                                                  num_samples,
 906                                                  region);
 907    intel_region_release(&region);
 908 }