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/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 #undef CHIPSET
  81 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
  82 #include "pci_ids/i915_pci_ids.h"
  83 #include "pci_ids/i965_pci_ids.h"
  84       default:
  85          chipset = "Unknown Intel Chipset";
  86          break;
  87       }
  88
  89       (void) driGetRendererString(buffer, chipset, 0);
  90       return (GLubyte *) buffer;
  91
  92    default:
  93       return NULL;
  94    }
  95 }
  96
  97 void
  98 intel_resolve_for_dri2_flush(struct intel_context *intel,
  99                              __DRIdrawable *drawable)
 100 {
 101    if (intel->gen < 6) {
 102       /* MSAA and fast color clear are not supported, so don't waste time
 103        * checking whether a resolve is needed.
 104        */
 105       return;
 106    }
 107
 108    struct gl_framebuffer *fb = drawable->driverPrivate;
 109    struct intel_renderbuffer *rb;
 110
 111    /* Usually, only the back buffer will need to be downsampled. However,
 112     * the front buffer will also need it if the user has rendered into it.
 113     */
 114    static const gl_buffer_index buffers[2] = {
 115          BUFFER_BACK_LEFT,
 116          BUFFER_FRONT_LEFT,
 117    };
 118
 119    for (int i = 0; i < 2; ++i) {
 120       rb = intel_get_renderbuffer(fb, buffers[i]);
 121       if (rb == NULL || rb->mt == NULL)
 122          continue;
 123       if (rb->mt->num_samples <= 1)
 124          intel_miptree_resolve_color(intel, rb->mt);
 125       else
 126          intel_miptree_downsample(intel, rb->mt);
 127    }
 128 }
 129
 130 static void
 131 intel_flush_front(struct gl_context *ctx)
 132 {
 133    struct intel_context *intel = intel_context(ctx);
 134     __DRIcontext *driContext = intel->driContext;
 135     __DRIdrawable *driDrawable = driContext->driDrawablePriv;
 136     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 137
 138     if (intel->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 139       if (screen->dri2.loader->flushFrontBuffer != NULL &&
 140           driDrawable &&
 141           driDrawable->loaderPrivate) {
 142
 143          /* Resolve before flushing FAKE_FRONT_LEFT to FRONT_LEFT.
 144           *
 145           * This potentially resolves both front and back buffer. It
 146           * is unnecessary to resolve the back, but harms nothing except
 147           * performance. And no one cares about front-buffer render
 148           * performance.
 149           */
 150          intel_resolve_for_dri2_flush(intel, driDrawable);
 151
 152          screen->dri2.loader->flushFrontBuffer(driDrawable,
 153                                                driDrawable->loaderPrivate);
 154
 155          /* We set the dirty bit in intel_prepare_render() if we're
 156           * front buffer rendering once we get there.
 157           */
 158          intel->front_buffer_dirty = false;
 159       }
 160    }
 161 }
 162
 163 static unsigned
 164 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
 165 {
 166    return _mesa_get_format_bytes(intel_rb_format(rb)) * 8;
 167 }
 168
 169 static void
 170 intel_query_dri2_buffers(struct intel_context *intel,
 171                          __DRIdrawable *drawable,
 172                          __DRIbuffer **buffers,
 173                          int *count);
 174
 175 static void
 176 intel_process_dri2_buffer(struct intel_context *intel,
 177                           __DRIdrawable *drawable,
 178                           __DRIbuffer *buffer,
 179                           struct intel_renderbuffer *rb,
 180                           const char *buffer_name);
 181
 182 void
 183 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
 184 {
 185    struct gl_framebuffer *fb = drawable->driverPrivate;
 186    struct intel_renderbuffer *rb;
 187    struct intel_context *intel = context->driverPrivate;
 188    __DRIbuffer *buffers = NULL;
 189    int i, count;
 190    const char *region_name;
 191
 192    /* Set this up front, so that in case our buffers get invalidated
 193     * while we're getting new buffers, we don't clobber the stamp and
 194     * thus ignore the invalidate. */
 195    drawable->lastStamp = drawable->dri2.stamp;
 196
 197    if (unlikely(INTEL_DEBUG & DEBUG_DRI))
 198       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 199
 200    intel_query_dri2_buffers(intel, drawable, &buffers, &count);
 201
 202    if (buffers == NULL)
 203       return;
 204
 205    for (i = 0; i < count; i++) {
 206        switch (buffers[i].attachment) {
 207        case __DRI_BUFFER_FRONT_LEFT:
 208            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 209            region_name = "dri2 front buffer";
 210            break;
 211
 212        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 213            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 214            region_name = "dri2 fake front buffer";
 215            break;
 216
 217        case __DRI_BUFFER_BACK_LEFT:
 218            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 219            region_name = "dri2 back buffer";
 220            break;
 221
 222        case __DRI_BUFFER_DEPTH:
 223        case __DRI_BUFFER_HIZ:
 224        case __DRI_BUFFER_DEPTH_STENCIL:
 225        case __DRI_BUFFER_STENCIL:
 226        case __DRI_BUFFER_ACCUM:
 227        default:
 228            fprintf(stderr,
 229                    "unhandled buffer attach event, attachment type %d\n",
 230                    buffers[i].attachment);
 231            return;
 232        }
 233
 234        intel_process_dri2_buffer(intel, drawable, &buffers[i], rb, region_name);
 235    }
 236
 237    driUpdateFramebufferSize(&intel->ctx, drawable);
 238 }
 239
 240 /**
 241  * intel_prepare_render should be called anywhere that curent read/drawbuffer
 242  * state is required.
 243  */
 244 void
 245 intel_prepare_render(struct intel_context *intel)
 246 {
 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 (intel->is_front_buffer_rendering)
 269       intel->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 (!intel->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 void
 296 intel_viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 297 {
 298     struct intel_context *intel = intel_context(ctx);
 299     __DRIcontext *driContext = intel->driContext;
 300
 301     if (intel->saved_viewport)
 302         intel->saved_viewport(ctx, x, y, w, h);
 303
 304     if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
 305        dri2InvalidateDrawable(driContext->driDrawablePriv);
 306        dri2InvalidateDrawable(driContext->driReadablePriv);
 307     }
 308 }
 309
 310 static const struct dri_debug_control debug_control[] = {
 311    { "tex",   DEBUG_TEXTURE},
 312    { "state", DEBUG_STATE},
 313    { "ioctl", DEBUG_IOCTL},
 314    { "blit",  DEBUG_BLIT},
 315    { "mip",   DEBUG_MIPTREE},
 316    { "fall",  DEBUG_PERF},
 317    { "perf",  DEBUG_PERF},
 318    { "bat",   DEBUG_BATCH},
 319    { "pix",   DEBUG_PIXEL},
 320    { "buf",   DEBUG_BUFMGR},
 321    { "reg",   DEBUG_REGION},
 322    { "fbo",   DEBUG_FBO},
 323    { "fs",    DEBUG_WM },
 324    { "gs",    DEBUG_GS},
 325    { "sync",  DEBUG_SYNC},
 326    { "prim",  DEBUG_PRIMS },
 327    { "vert",  DEBUG_VERTS },
 328    { "dri",   DEBUG_DRI },
 329    { "sf",    DEBUG_SF },
 330    { "stats", DEBUG_STATS },
 331    { "wm",    DEBUG_WM },
 332    { "urb",   DEBUG_URB },
 333    { "vs",    DEBUG_VS },
 334    { "clip",  DEBUG_CLIP },
 335    { "aub",   DEBUG_AUB },
 336    { "shader_time", DEBUG_SHADER_TIME },
 337    { "no16",  DEBUG_NO16 },
 338    { "blorp", DEBUG_BLORP },
 339    { NULL,    0 }
 340 };
 341
 342
 343 static void
 344 intelInvalidateState(struct gl_context * ctx, GLuint new_state)
 345 {
 346     struct intel_context *intel = intel_context(ctx);
 347
 348     if (ctx->swrast_context)
 349        _swrast_InvalidateState(ctx, new_state);
 350    _vbo_InvalidateState(ctx, new_state);
 351
 352    intel->NewGLState |= new_state;
 353
 354    if (intel->vtbl.invalidate_state)
 355       intel->vtbl.invalidate_state( intel, new_state );
 356 }
 357
 358 void
 359 _intel_flush(struct gl_context *ctx, const char *file, int line)
 360 {
 361    struct intel_context *intel = intel_context(ctx);
 362
 363    if (intel->batch.used)
 364       _intel_batchbuffer_flush(intel, file, line);
 365 }
 366
 367 static void
 368 intel_glFlush(struct gl_context *ctx)
 369 {
 370    struct intel_context *intel = intel_context(ctx);
 371
 372    intel_flush(ctx);
 373    intel_flush_front(ctx);
 374    if (intel->is_front_buffer_rendering)
 375       intel->need_throttle = true;
 376 }
 377
 378 void
 379 intelFinish(struct gl_context * ctx)
 380 {
 381    struct intel_context *intel = intel_context(ctx);
 382
 383    intel_flush(ctx);
 384    intel_flush_front(ctx);
 385
 386    if (intel->batch.last_bo)
 387       drm_intel_bo_wait_rendering(intel->batch.last_bo);
 388 }
 389
 390 void
 391 intelInitDriverFunctions(struct dd_function_table *functions)
 392 {
 393    _mesa_init_driver_functions(functions);
 394
 395    functions->Flush = intel_glFlush;
 396    functions->Finish = intelFinish;
 397    functions->GetString = intelGetString;
 398    functions->UpdateState = intelInvalidateState;
 399
 400    intelInitTextureFuncs(functions);
 401    intelInitTextureImageFuncs(functions);
 402    intelInitTextureSubImageFuncs(functions);
 403    intelInitTextureCopyImageFuncs(functions);
 404    intelInitClearFuncs(functions);
 405    intelInitBufferFuncs(functions);
 406    intelInitPixelFuncs(functions);
 407    intelInitBufferObjectFuncs(functions);
 408    intel_init_syncobj_functions(functions);
 409 }
 410
 411 static bool
 412 validate_context_version(struct intel_screen *screen,
 413                          int mesa_api,
 414                          unsigned major_version,
 415                          unsigned minor_version,
 416                          unsigned *dri_ctx_error)
 417 {
 418    unsigned req_version = 10 * major_version + minor_version;
 419    unsigned max_version = 0;
 420
 421    switch (mesa_api) {
 422    case API_OPENGL_COMPAT:
 423       max_version = screen->max_gl_compat_version;
 424       break;
 425    case API_OPENGL_CORE:
 426       max_version = screen->max_gl_core_version;
 427       break;
 428    case API_OPENGLES:
 429       max_version = screen->max_gl_es1_version;
 430       break;
 431    case API_OPENGLES2:
 432       max_version = screen->max_gl_es2_version;
 433       break;
 434    default:
 435       max_version = 0;
 436       break;
 437    }
 438
 439    if (max_version == 0) {
 440       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 441       return false;
 442    } else if (req_version > max_version) {
 443       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 444       return false;
 445    }
 446
 447    return true;
 448 }
 449
 450 bool
 451 intelInitContext(struct intel_context *intel,
 452                  int api,
 453                  unsigned major_version,
 454                  unsigned minor_version,
 455                  const struct gl_config * mesaVis,
 456                  __DRIcontext * driContextPriv,
 457                  void *sharedContextPrivate,
 458                  struct dd_function_table *functions,
 459                  unsigned *dri_ctx_error)
 460 {
 461    struct gl_context *ctx = &intel->ctx;
 462    struct gl_context *shareCtx = (struct gl_context *) sharedContextPrivate;
 463    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 464    struct intel_screen *intelScreen = sPriv->driverPrivate;
 465    int bo_reuse_mode;
 466    struct gl_config visual;
 467
 468    /* we can't do anything without a connection to the device */
 469    if (intelScreen->bufmgr == NULL) {
 470       *dri_ctx_error = __DRI_CTX_ERROR_NO_MEMORY;
 471       return false;
 472    }
 473
 474    if (!validate_context_version(intelScreen,
 475                                  api, major_version, minor_version,
 476                                  dri_ctx_error))
 477       return false;
 478
 479    /* Can't rely on invalidate events, fall back to glViewport hack */
 480    if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
 481       intel->saved_viewport = functions->Viewport;
 482       functions->Viewport = intel_viewport;
 483    }
 484
 485    if (mesaVis == NULL) {
 486       memset(&visual, 0, sizeof visual);
 487       mesaVis = &visual;
 488    }
 489
 490    intel->intelScreen = intelScreen;
 491
 492    if (!_mesa_initialize_context(&intel->ctx, api, mesaVis, shareCtx,
 493                                  functions)) {
 494       *dri_ctx_error = __DRI_CTX_ERROR_NO_MEMORY;
 495       printf("%s: failed to init mesa context\n", __FUNCTION__);
 496       return false;
 497    }
 498
 499    driContextPriv->driverPrivate = intel;
 500    intel->driContext = driContextPriv;
 501    intel->driFd = sPriv->fd;
 502
 503    intel->gen = intelScreen->gen;
 504
 505    const int devID = intelScreen->deviceID;
 506    if (IS_SNB_GT1(devID) || IS_IVB_GT1(devID) || IS_HSW_GT1(devID))
 507       intel->gt = 1;
 508    else if (IS_SNB_GT2(devID) || IS_IVB_GT2(devID) || IS_HSW_GT2(devID))
 509       intel->gt = 2;
 510    else if (IS_HSW_GT3(devID))
 511       intel->gt = 3;
 512    else
 513       intel->gt = 0;
 514
 515    if (IS_HASWELL(devID)) {
 516       intel->is_haswell = true;
 517    } else if (IS_BAYTRAIL(devID)) {
 518       intel->is_baytrail = true;
 519       intel->gt = 1;
 520    } else if (IS_G4X(devID)) {
 521       intel->is_g4x = true;
 522    } else if (IS_945(devID)) {
 523       intel->is_945 = true;
 524    }
 525
 526    if (intel->gen >= 5) {
 527       intel->needs_ff_sync = true;
 528    }
 529
 530    intel->has_separate_stencil = intel->intelScreen->hw_has_separate_stencil;
 531    intel->must_use_separate_stencil = intel->intelScreen->hw_must_use_separate_stencil;
 532    intel->has_hiz = intel->gen >= 6;
 533    intel->has_llc = intel->intelScreen->hw_has_llc;
 534    intel->has_swizzling = intel->intelScreen->hw_has_swizzling;
 535
 536    memset(&ctx->TextureFormatSupported,
 537           0, sizeof(ctx->TextureFormatSupported));
 538
 539    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 540                        sPriv->myNum, "i965");
 541    intel->maxBatchSize = BATCH_SZ;
 542
 543    /* Estimate the size of the mappable aperture into the GTT.  There's an
 544     * ioctl to get the whole GTT size, but not one to get the mappable subset.
 545     * It turns out it's basically always 256MB, though some ancient hardware
 546     * was smaller.
 547     */
 548    uint32_t gtt_size = 256 * 1024 * 1024;
 549
 550    /* We don't want to map two objects such that a memcpy between them would
 551     * just fault one mapping in and then the other over and over forever.  So
 552     * we would need to divide the GTT size by 2.  Additionally, some GTT is
 553     * taken up by things like the framebuffer and the ringbuffer and such, so
 554     * be more conservative.
 555     */
 556    intel->max_gtt_map_object_size = gtt_size / 4;
 557
 558    intel->bufmgr = intelScreen->bufmgr;
 559
 560    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
 561    switch (bo_reuse_mode) {
 562    case DRI_CONF_BO_REUSE_DISABLED:
 563       break;
 564    case DRI_CONF_BO_REUSE_ALL:
 565       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
 566       break;
 567    }
 568
 569    ctx->Const.MinLineWidth = 1.0;
 570    ctx->Const.MinLineWidthAA = 1.0;
 571    ctx->Const.MaxLineWidth = 5.0;
 572    ctx->Const.MaxLineWidthAA = 5.0;
 573    ctx->Const.LineWidthGranularity = 0.5;
 574
 575    ctx->Const.MinPointSize = 1.0;
 576    ctx->Const.MinPointSizeAA = 1.0;
 577    ctx->Const.MaxPointSize = 255.0;
 578    ctx->Const.MaxPointSizeAA = 3.0;
 579    ctx->Const.PointSizeGranularity = 1.0;
 580
 581    if (intel->gen >= 6)
 582       ctx->Const.MaxClipPlanes = 8;
 583
 584    ctx->Const.StripTextureBorder = GL_TRUE;
 585
 586    /* reinitialize the context point state.
 587     * It depend on constants in __struct gl_contextRec::Const
 588     */
 589    _mesa_init_point(ctx);
 590
 591    ctx->Const.MaxRenderbufferSize = 8192;
 592
 593    /* Initialize the software rasterizer and helper modules.
 594     *
 595     * As of GL 3.1 core, the gen4+ driver doesn't need the swrast context for
 596     * software fallbacks (which we have to support on legacy GL to do weird
 597     * glDrawPixels(), glBitmap(), and other functions).
 598     */
 599    if (api != API_OPENGL_CORE) {
 600       _swrast_CreateContext(ctx);
 601    }
 602
 603    _vbo_CreateContext(ctx);
 604    if (ctx->swrast_context) {
 605       _tnl_CreateContext(ctx);
 606       _swsetup_CreateContext(ctx);
 607
 608       /* Configure swrast to match hardware characteristics: */
 609       _swrast_allow_pixel_fog(ctx, false);
 610       _swrast_allow_vertex_fog(ctx, true);
 611    }
 612
 613    _mesa_meta_init(ctx);
 614
 615    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 616    intel->hw_stipple = 1;
 617
 618    intelInitExtensions(ctx);
 619
 620    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 621    if (INTEL_DEBUG & DEBUG_BUFMGR)
 622       dri_bufmgr_set_debug(intel->bufmgr, true);
 623    if ((INTEL_DEBUG & DEBUG_SHADER_TIME) && intel->gen < 7) {
 624       fprintf(stderr,
 625               "shader_time debugging requires gen7 (Ivybridge) or better.\n");
 626       INTEL_DEBUG &= ~DEBUG_SHADER_TIME;
 627    }
 628    if (INTEL_DEBUG & DEBUG_PERF)
 629       intel->perf_debug = true;
 630
 631    if (INTEL_DEBUG & DEBUG_AUB)
 632       drm_intel_bufmgr_gem_set_aub_dump(intel->bufmgr, true);
 633
 634    intel_batchbuffer_init(intel);
 635
 636    intel_fbo_init(intel);
 637
 638    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
 639
 640    if (!driQueryOptionb(&intel->optionCache, "hiz")) {
 641        intel->has_hiz = false;
 642        /* On gen6, you can only do separate stencil with HIZ. */
 643        if (intel->gen == 6)
 644           intel->has_separate_stencil = false;
 645    }
 646
 647    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
 648       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 649       intel->always_flush_batch = 1;
 650    }
 651
 652    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
 653       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 654       intel->always_flush_cache = 1;
 655    }
 656
 657    if (driQueryOptionb(&intel->optionCache, "disable_throttling")) {
 658       fprintf(stderr, "disabling flush throttling\n");
 659       intel->disable_throttling = 1;
 660    }
 661
 662    return true;
 663 }
 664
 665 void
 666 intelDestroyContext(__DRIcontext * driContextPriv)
 667 {
 668    struct intel_context *intel =
 669       (struct intel_context *) driContextPriv->driverPrivate;
 670    struct gl_context *ctx = &intel->ctx;
 671
 672    assert(intel);               /* should never be null */
 673    if (intel) {
 674       /* Dump a final BMP in case the application doesn't call SwapBuffers */
 675       if (INTEL_DEBUG & DEBUG_AUB) {
 676          intel_batchbuffer_flush(intel);
 677          aub_dump_bmp(&intel->ctx);
 678       }
 679
 680       _mesa_meta_free(&intel->ctx);
 681
 682       intel->vtbl.destroy(intel);
 683
 684       if (ctx->swrast_context) {
 685          _swsetup_DestroyContext(&intel->ctx);
 686          _tnl_DestroyContext(&intel->ctx);
 687       }
 688       _vbo_DestroyContext(&intel->ctx);
 689
 690       if (ctx->swrast_context)
 691          _swrast_DestroyContext(&intel->ctx);
 692
 693       intel_batchbuffer_free(intel);
 694
 695       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 696       intel->first_post_swapbuffers_batch = NULL;
 697
 698       driDestroyOptionCache(&intel->optionCache);
 699
 700       /* free the Mesa context */
 701       _mesa_free_context_data(&intel->ctx);
 702
 703       ralloc_free(intel);
 704       driContextPriv->driverPrivate = NULL;
 705    }
 706 }
 707
 708 GLboolean
 709 intelUnbindContext(__DRIcontext * driContextPriv)
 710 {
 711    /* Unset current context and dispath table */
 712    _mesa_make_current(NULL, NULL, NULL);
 713
 714    return true;
 715 }
 716
 717 /**
 718  * Fixes up the context for GLES23 with our default-to-sRGB-capable behavior
 719  * on window system framebuffers.
 720  *
 721  * Desktop GL is fairly reasonable in its handling of sRGB: You can ask if
 722  * your renderbuffer can do sRGB encode, and you can flip a switch that does
 723  * sRGB encode if the renderbuffer can handle it.  You can ask specifically
 724  * for a visual where you're guaranteed to be capable, but it turns out that
 725  * everyone just makes all their ARGB8888 visuals capable and doesn't offer
 726  * incapable ones, becuase there's no difference between the two in resources
 727  * used.  Applications thus get built that accidentally rely on the default
 728  * visual choice being sRGB, so we make ours sRGB capable.  Everything sounds
 729  * great...
 730  *
 731  * But for GLES2/3, they decided that it was silly to not turn on sRGB encode
 732  * for sRGB renderbuffers you made with the GL_EXT_texture_sRGB equivalent.
 733  * So they removed the enable knob and made it "if the renderbuffer is sRGB
 734  * capable, do sRGB encode".  Then, for your window system renderbuffers, you
 735  * can ask for sRGB visuals and get sRGB encode, or not ask for sRGB visuals
 736  * and get no sRGB encode (assuming that both kinds of visual are available).
 737  * Thus our choice to support sRGB by default on our visuals for desktop would
 738  * result in broken rendering of GLES apps that aren't expecting sRGB encode.
 739  *
 740  * Unfortunately, renderbuffer setup happens before a context is created.  So
 741  * in intel_screen.c we always set up sRGB, and here, if you're a GLES2/3
 742  * context (without an sRGB visual, though we don't have sRGB visuals exposed
 743  * yet), we go turn that back off before anyone finds out.
 744  */
 745 static void
 746 intel_gles3_srgb_workaround(struct intel_context *intel,
 747                             struct gl_framebuffer *fb)
 748 {
 749    struct gl_context *ctx = &intel->ctx;
 750
 751    if (_mesa_is_desktop_gl(ctx) || !fb->Visual.sRGBCapable)
 752       return;
 753
 754    /* Some day when we support the sRGB capable bit on visuals available for
 755     * GLES, we'll need to respect that and not disable things here.
 756     */
 757    fb->Visual.sRGBCapable = false;
 758    for (int i = 0; i < BUFFER_COUNT; i++) {
 759       if (fb->Attachment[i].Renderbuffer &&
 760           fb->Attachment[i].Renderbuffer->Format == MESA_FORMAT_SARGB8) {
 761          fb->Attachment[i].Renderbuffer->Format = MESA_FORMAT_ARGB8888;
 762       }
 763    }
 764 }
 765
 766 GLboolean
 767 intelMakeCurrent(__DRIcontext * driContextPriv,
 768                  __DRIdrawable * driDrawPriv,
 769                  __DRIdrawable * driReadPriv)
 770 {
 771    struct intel_context *intel;
 772    GET_CURRENT_CONTEXT(curCtx);
 773
 774    if (driContextPriv)
 775       intel = (struct intel_context *) driContextPriv->driverPrivate;
 776    else
 777       intel = NULL;
 778
 779    /* According to the glXMakeCurrent() man page: "Pending commands to
 780     * the previous context, if any, are flushed before it is released."
 781     * But only flush if we're actually changing contexts.
 782     */
 783    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
 784       _mesa_flush(curCtx);
 785    }
 786
 787    if (driContextPriv) {
 788       struct gl_context *ctx = &intel->ctx;
 789       struct gl_framebuffer *fb, *readFb;
 790
 791       if (driDrawPriv == NULL && driReadPriv == NULL) {
 792          fb = _mesa_get_incomplete_framebuffer();
 793          readFb = _mesa_get_incomplete_framebuffer();
 794       } else {
 795          fb = driDrawPriv->driverPrivate;
 796          readFb = driReadPriv->driverPrivate;
 797          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 798          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 799       }
 800
 801       intel_prepare_render(intel);
 802       _mesa_make_current(ctx, fb, readFb);
 803
 804       intel_gles3_srgb_workaround(intel, ctx->WinSysDrawBuffer);
 805       intel_gles3_srgb_workaround(intel, ctx->WinSysReadBuffer);
 806    }
 807    else {
 808       _mesa_make_current(NULL, NULL, NULL);
 809    }
 810
 811    return true;
 812 }
 813
 814 /**
 815  * \brief Query DRI2 to obtain a DRIdrawable's buffers.
 816  *
 817  * To determine which DRI buffers to request, examine the renderbuffers
 818  * attached to the drawable's framebuffer. Then request the buffers with
 819  * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
 820  *
 821  * This is called from intel_update_renderbuffers().
 822  *
 823  * \param drawable      Drawable whose buffers are queried.
 824  * \param buffers       [out] List of buffers returned by DRI2 query.
 825  * \param buffer_count  [out] Number of buffers returned.
 826  *
 827  * \see intel_update_renderbuffers()
 828  * \see DRI2GetBuffers()
 829  * \see DRI2GetBuffersWithFormat()
 830  */
 831 static void
 832 intel_query_dri2_buffers(struct intel_context *intel,
 833                          __DRIdrawable *drawable,
 834                          __DRIbuffer **buffers,
 835                          int *buffer_count)
 836 {
 837    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
 838    struct gl_framebuffer *fb = drawable->driverPrivate;
 839    int i = 0;
 840    unsigned attachments[8];
 841
 842    struct intel_renderbuffer *front_rb;
 843    struct intel_renderbuffer *back_rb;
 844
 845    front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 846    back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 847
 848    memset(attachments, 0, sizeof(attachments));
 849    if ((intel->is_front_buffer_rendering ||
 850         intel->is_front_buffer_reading ||
 851         !back_rb) && front_rb) {
 852       /* If a fake front buffer is in use, then querying for
 853        * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
 854        * the real front buffer to the fake front buffer.  So before doing the
 855        * query, we need to make sure all the pending drawing has landed in the
 856        * real front buffer.
 857        */
 858       intel_flush(&intel->ctx);
 859       intel_flush_front(&intel->ctx);
 860
 861       attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 862       attachments[i++] = intel_bits_per_pixel(front_rb);
 863    } else if (front_rb && intel->front_buffer_dirty) {
 864       /* We have pending front buffer rendering, but we aren't querying for a
 865        * front buffer.  If the front buffer we have is a fake front buffer,
 866        * the X server is going to throw it away when it processes the query.
 867        * So before doing the query, make sure all the pending drawing has
 868        * landed in the real front buffer.
 869        */
 870       intel_flush(&intel->ctx);
 871       intel_flush_front(&intel->ctx);
 872    }
 873
 874    if (back_rb) {
 875       attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 876       attachments[i++] = intel_bits_per_pixel(back_rb);
 877    }
 878
 879    assert(i <= ARRAY_SIZE(attachments));
 880
 881    *buffers = screen->dri2.loader->getBuffersWithFormat(drawable,
 882                                                         &drawable->w,
 883                                                         &drawable->h,
 884                                                         attachments, i / 2,
 885                                                         buffer_count,
 886                                                         drawable->loaderPrivate);
 887 }
 888
 889 /**
 890  * \brief Assign a DRI buffer's DRM region to a renderbuffer.
 891  *
 892  * This is called from intel_update_renderbuffers().
 893  *
 894  * \par Note:
 895  *    DRI buffers whose attachment point is DRI2BufferStencil or
 896  *    DRI2BufferDepthStencil are handled as special cases.
 897  *
 898  * \param buffer_name is a human readable name, such as "dri2 front buffer",
 899  *        that is passed to intel_region_alloc_for_handle().
 900  *
 901  * \see intel_update_renderbuffers()
 902  * \see intel_region_alloc_for_handle()
 903  */
 904 static void
 905 intel_process_dri2_buffer(struct intel_context *intel,
 906                           __DRIdrawable *drawable,
 907                           __DRIbuffer *buffer,
 908                           struct intel_renderbuffer *rb,
 909                           const char *buffer_name)
 910 {
 911    struct intel_region *region = NULL;
 912
 913    if (!rb)
 914       return;
 915
 916    unsigned num_samples = rb->Base.Base.NumSamples;
 917
 918    /* We try to avoid closing and reopening the same BO name, because the first
 919     * use of a mapping of the buffer involves a bunch of page faulting which is
 920     * moderately expensive.
 921     */
 922    if (num_samples == 0) {
 923        if (rb->mt &&
 924            rb->mt->region &&
 925            rb->mt->region->name == buffer->name)
 926           return;
 927    } else {
 928        if (rb->mt &&
 929            rb->mt->singlesample_mt &&
 930            rb->mt->singlesample_mt->region &&
 931            rb->mt->singlesample_mt->region->name == buffer->name)
 932           return;
 933    }
 934
 935    if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 936       fprintf(stderr,
 937               "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 938               buffer->name, buffer->attachment,
 939               buffer->cpp, buffer->pitch);
 940    }
 941
 942    intel_miptree_release(&rb->mt);
 943    region = intel_region_alloc_for_handle(intel->intelScreen,
 944                                           buffer->cpp,
 945                                           drawable->w,
 946                                           drawable->h,
 947                                           buffer->pitch,
 948                                           buffer->name,
 949                                           buffer_name);
 950    if (!region)
 951       return;
 952
 953    rb->mt = intel_miptree_create_for_dri2_buffer(intel,
 954                                                  buffer->attachment,
 955                                                  intel_rb_format(rb),
 956                                                  num_samples,
 957                                                  region);
 958    intel_region_release(&region);
 959 }