content/browser/compositor/delegated_frame_host.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/compositor/delegated_frame_host.h"
   6
   7 #include "base/callback_helpers.h"
   8 #include "base/command_line.h"
   9 #include "cc/output/compositor_frame.h"
  10 #include "cc/output/compositor_frame_ack.h"
  11 #include "cc/output/copy_output_request.h"
  12 #include "cc/resources/single_release_callback.h"
  13 #include "cc/resources/texture_mailbox.h"
  14 #include "cc/surfaces/surface.h"
  15 #include "cc/surfaces/surface_factory.h"
  16 #include "cc/surfaces/surface_manager.h"
  17 #include "content/browser/compositor/resize_lock.h"
  18 #include "content/browser/gpu/compositor_util.h"
  19 #include "content/common/gpu/client/gl_helper.h"
  20 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
  21 #include "content/public/common/content_switches.h"
  22 #include "media/base/video_frame.h"
  23 #include "media/base/video_util.h"
  24 #include "skia/ext/image_operations.h"
  25 #include "third_party/skia/include/core/SkCanvas.h"
  26 #include "third_party/skia/include/core/SkPaint.h"
  27 #include "third_party/skia/include/effects/SkLumaColorFilter.h"
  28 #include "ui/gfx/frame_time.h"
  29 #include "ui/gfx/geometry/dip_util.h"
  30
  31 namespace content {
  32
  33 namespace {
  34
  35 void SatisfyCallback(cc::SurfaceManager* manager,
  36                      cc::SurfaceSequence sequence) {
  37   std::vector<uint32_t> sequences;
  38   sequences.push_back(sequence.sequence);
  39   manager->DidSatisfySequences(sequence.id_namespace, &sequences);
  40 }
  41
  42 void RequireCallback(cc::SurfaceManager* manager,
  43                      cc::SurfaceId id,
  44                      cc::SurfaceSequence sequence) {
  45   cc::Surface* surface = manager->GetSurfaceForId(id);
  46   if (!surface) {
  47     LOG(ERROR) << "Attempting to require callback on nonexistent surface";
  48     return;
  49   }
  50   surface->AddDestructionDependency(sequence);
  51 }
  52
  53 }  // namespace
  54
  55 ////////////////////////////////////////////////////////////////////////////////
  56 // DelegatedFrameHost
  57
  58 DelegatedFrameHost::DelegatedFrameHost(DelegatedFrameHostClient* client)
  59     : client_(client),
  60       compositor_(nullptr),
  61       use_surfaces_(UseSurfacesEnabled()),
  62       last_output_surface_id_(0),
  63       pending_delegated_ack_count_(0),
  64       skipped_frames_(false),
  65       current_scale_factor_(1.f),
  66       can_lock_compositor_(YES_CAN_LOCK),
  67       delegated_frame_evictor_(new DelegatedFrameEvictor(this)) {
  68   ImageTransportFactory::GetInstance()->AddObserver(this);
  69 }
  70
  71 void DelegatedFrameHost::WasShown(const ui::LatencyInfo& latency_info) {
  72   delegated_frame_evictor_->SetVisible(true);
  73
  74   if (surface_id_.is_null() && !frame_provider_.get() &&
  75       !released_front_lock_.get()) {
  76     if (compositor_)
  77       released_front_lock_ = compositor_->GetCompositorLock();
  78   }
  79
  80   if (compositor_) {
  81     compositor_->SetLatencyInfo(latency_info);
  82   }
  83 }
  84
  85 bool DelegatedFrameHost::HasSavedFrame() {
  86   return delegated_frame_evictor_->HasFrame();
  87 }
  88
  89 void DelegatedFrameHost::WasHidden() {
  90   delegated_frame_evictor_->SetVisible(false);
  91   released_front_lock_ = NULL;
  92 }
  93
  94 void DelegatedFrameHost::MaybeCreateResizeLock() {
  95   if (!ShouldCreateResizeLock())
  96     return;
  97   DCHECK(compositor_);
  98
  99   bool defer_compositor_lock =
 100       can_lock_compositor_ == NO_PENDING_RENDERER_FRAME ||
 101       can_lock_compositor_ == NO_PENDING_COMMIT;
 102
 103   if (can_lock_compositor_ == YES_CAN_LOCK)
 104     can_lock_compositor_ = YES_DID_LOCK;
 105
 106   resize_lock_ =
 107       client_->DelegatedFrameHostCreateResizeLock(defer_compositor_lock);
 108 }
 109
 110 bool DelegatedFrameHost::ShouldCreateResizeLock() {
 111   if (!client_->DelegatedFrameCanCreateResizeLock())
 112     return false;
 113
 114   if (resize_lock_)
 115     return false;
 116
 117   gfx::Size desired_size = client_->DelegatedFrameHostDesiredSizeInDIP();
 118   if (desired_size == current_frame_size_in_dip_ || desired_size.IsEmpty())
 119     return false;
 120
 121   if (!compositor_)
 122     return false;
 123
 124   return true;
 125 }
 126
 127 void DelegatedFrameHost::CopyFromCompositingSurface(
 128     const gfx::Rect& src_subrect,
 129     const gfx::Size& output_size,
 130     ReadbackRequestCallback& callback,
 131     const SkColorType color_type) {
 132   // Only ARGB888 and RGB565 supported as of now.
 133   bool format_support = ((color_type == kAlpha_8_SkColorType) ||
 134                          (color_type == kRGB_565_SkColorType) ||
 135                          (color_type == kN32_SkColorType));
 136   DCHECK(format_support);
 137   if (!CanCopyToBitmap()) {
 138     callback.Run(SkBitmap(), content::READBACK_SURFACE_UNAVAILABLE);
 139     return;
 140   }
 141
 142   scoped_ptr<cc::CopyOutputRequest> request =
 143       cc::CopyOutputRequest::CreateRequest(base::Bind(
 144           &DelegatedFrameHost::CopyFromCompositingSurfaceHasResult,
 145           output_size,
 146           color_type,
 147           callback));
 148   if (!src_subrect.IsEmpty())
 149     request->set_area(src_subrect);
 150   RequestCopyOfOutput(request.Pass());
 151 }
 152
 153 void DelegatedFrameHost::CopyFromCompositingSurfaceToVideoFrame(
 154       const gfx::Rect& src_subrect,
 155       const scoped_refptr<media::VideoFrame>& target,
 156       const base::Callback<void(bool)>& callback) {
 157   if (!CanCopyToVideoFrame()) {
 158     callback.Run(false);
 159     return;
 160   }
 161
 162   scoped_ptr<cc::CopyOutputRequest> request =
 163       cc::CopyOutputRequest::CreateRequest(base::Bind(
 164           &DelegatedFrameHost::
 165                CopyFromCompositingSurfaceHasResultForVideo,
 166           AsWeakPtr(),  // For caching the ReadbackYUVInterface on this class.
 167           nullptr,
 168           target,
 169           callback));
 170   request->set_area(src_subrect);
 171   RequestCopyOfOutput(request.Pass());
 172 }
 173
 174 bool DelegatedFrameHost::CanCopyToBitmap() const {
 175   return compositor_ &&
 176          client_->DelegatedFrameHostGetLayer()->has_external_content();
 177 }
 178
 179 bool DelegatedFrameHost::CanCopyToVideoFrame() const {
 180   return compositor_ &&
 181          client_->DelegatedFrameHostGetLayer()->has_external_content();
 182 }
 183
 184 bool DelegatedFrameHost::CanSubscribeFrame() const {
 185   return true;
 186 }
 187
 188 void DelegatedFrameHost::BeginFrameSubscription(
 189     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
 190   frame_subscriber_ = subscriber.Pass();
 191 }
 192
 193 void DelegatedFrameHost::EndFrameSubscription() {
 194   idle_frame_subscriber_textures_.clear();
 195   frame_subscriber_.reset();
 196 }
 197
 198 bool DelegatedFrameHost::ShouldSkipFrame(gfx::Size size_in_dip) const {
 199   // Should skip a frame only when another frame from the renderer is guaranteed
 200   // to replace it. Otherwise may cause hangs when the renderer is waiting for
 201   // the completion of latency infos (such as when taking a Snapshot.)
 202   if (can_lock_compositor_ == NO_PENDING_RENDERER_FRAME ||
 203       can_lock_compositor_ == NO_PENDING_COMMIT ||
 204       !resize_lock_.get())
 205     return false;
 206
 207   return size_in_dip != resize_lock_->expected_size();
 208 }
 209
 210 void DelegatedFrameHost::WasResized() {
 211   if (client_->DelegatedFrameHostDesiredSizeInDIP() !=
 212           current_frame_size_in_dip_ &&
 213       !client_->DelegatedFrameHostIsVisible())
 214     EvictDelegatedFrame();
 215   MaybeCreateResizeLock();
 216 }
 217
 218 gfx::Size DelegatedFrameHost::GetRequestedRendererSize() const {
 219   if (resize_lock_)
 220     return resize_lock_->expected_size();
 221   else
 222     return client_->DelegatedFrameHostDesiredSizeInDIP();
 223 }
 224
 225 void DelegatedFrameHost::CheckResizeLock() {
 226   if (!resize_lock_ ||
 227       resize_lock_->expected_size() != current_frame_size_in_dip_)
 228     return;
 229
 230   // Since we got the size we were looking for, unlock the compositor. But delay
 231   // the release of the lock until we've kicked a frame with the new texture, to
 232   // avoid resizing the UI before we have a chance to draw a "good" frame.
 233   resize_lock_->UnlockCompositor();
 234 }
 235
 236 void DelegatedFrameHost::DidReceiveFrameFromRenderer(
 237     const gfx::Rect& damage_rect) {
 238   if (!frame_subscriber() || !CanCopyToVideoFrame())
 239     return;
 240
 241   const base::TimeTicks now = gfx::FrameTime::Now();
 242   base::TimeTicks present_time;
 243   if (vsync_timebase_.is_null() || vsync_interval_ <= base::TimeDelta()) {
 244     present_time = now;
 245   } else {
 246     const int64 intervals_elapsed = (now - vsync_timebase_) / vsync_interval_;
 247     present_time = vsync_timebase_ + (intervals_elapsed + 1) * vsync_interval_;
 248   }
 249
 250   scoped_refptr<media::VideoFrame> frame;
 251   RenderWidgetHostViewFrameSubscriber::DeliverFrameCallback callback;
 252   if (!frame_subscriber()->ShouldCaptureFrame(damage_rect, present_time,
 253                                               &frame, &callback))
 254     return;
 255
 256   // Get a texture to re-use; else, create a new one.
 257   scoped_refptr<OwnedMailbox> subscriber_texture;
 258   if (!idle_frame_subscriber_textures_.empty()) {
 259     subscriber_texture = idle_frame_subscriber_textures_.back();
 260     idle_frame_subscriber_textures_.pop_back();
 261   } else if (GLHelper* helper =
 262                  ImageTransportFactory::GetInstance()->GetGLHelper()) {
 263     subscriber_texture = new OwnedMailbox(helper);
 264   }
 265
 266   scoped_ptr<cc::CopyOutputRequest> request =
 267       cc::CopyOutputRequest::CreateRequest(base::Bind(
 268           &DelegatedFrameHost::CopyFromCompositingSurfaceHasResultForVideo,
 269           AsWeakPtr(),
 270           subscriber_texture,
 271           frame,
 272           base::Bind(callback, present_time)));
 273   // Setting the source in this copy request asks that the layer abort any prior
 274   // uncommitted copy requests made on behalf of the same frame subscriber.
 275   // This will not affect any of the copy requests spawned elsewhere from
 276   // DelegatedFrameHost (e.g., a call to CopyFromCompositingSurface() for
 277   // screenshots) since those copy requests do not specify |frame_subscriber()|
 278   // as a source.
 279   request->set_source(frame_subscriber());
 280   request->set_area(gfx::Rect(current_frame_size_in_dip_));
 281   if (subscriber_texture.get()) {
 282     request->SetTextureMailbox(
 283         cc::TextureMailbox(subscriber_texture->mailbox(),
 284                            subscriber_texture->target(),
 285                            subscriber_texture->sync_point()));
 286   }
 287   RequestCopyOfOutput(request.Pass());
 288 }
 289
 290 void DelegatedFrameHost::SwapDelegatedFrame(
 291     uint32 output_surface_id,
 292     scoped_ptr<cc::DelegatedFrameData> frame_data,
 293     float frame_device_scale_factor,
 294     const std::vector<ui::LatencyInfo>& latency_info) {
 295   DCHECK(!frame_data->render_pass_list.empty());
 296
 297   cc::RenderPass* root_pass = frame_data->render_pass_list.back();
 298
 299   gfx::Size frame_size = root_pass->output_rect.size();
 300   gfx::Size frame_size_in_dip =
 301       gfx::ConvertSizeToDIP(frame_device_scale_factor, frame_size);
 302
 303   gfx::Rect damage_rect = gfx::ToEnclosingRect(root_pass->damage_rect);
 304   damage_rect.Intersect(gfx::Rect(frame_size));
 305   gfx::Rect damage_rect_in_dip =
 306       gfx::ConvertRectToDIP(frame_device_scale_factor, damage_rect);
 307
 308   if (ShouldSkipFrame(frame_size_in_dip)) {
 309     cc::CompositorFrameAck ack;
 310     cc::TransferableResource::ReturnResources(frame_data->resource_list,
 311                                               &ack.resources);
 312
 313     skipped_latency_info_list_.insert(skipped_latency_info_list_.end(),
 314         latency_info.begin(), latency_info.end());
 315
 316     client_->DelegatedFrameHostSendCompositorSwapAck(output_surface_id, ack);
 317     skipped_frames_ = true;
 318     return;
 319   }
 320
 321   if (skipped_frames_) {
 322     skipped_frames_ = false;
 323     damage_rect = gfx::Rect(frame_size);
 324     damage_rect_in_dip = gfx::Rect(frame_size_in_dip);
 325
 326     // Give the same damage rect to the compositor.
 327     cc::RenderPass* root_pass = frame_data->render_pass_list.back();
 328     root_pass->damage_rect = damage_rect;
 329   }
 330
 331   if (output_surface_id != last_output_surface_id_) {
 332     // Resource ids are scoped by the output surface.
 333     // If the originating output surface doesn't match the last one, it
 334     // indicates the renderer's output surface may have been recreated, in which
 335     // case we should recreate the DelegatedRendererLayer, to avoid matching
 336     // resources from the old one with resources from the new one which would
 337     // have the same id. Changing the layer to showing painted content destroys
 338     // the DelegatedRendererLayer.
 339     EvictDelegatedFrame();
 340
 341     surface_factory_.reset();
 342     if (!surface_returned_resources_.empty())
 343       SendReturnedDelegatedResources(last_output_surface_id_);
 344
 345     // Drop the cc::DelegatedFrameResourceCollection so that we will not return
 346     // any resources from the old output surface with the new output surface id.
 347     if (resource_collection_.get()) {
 348       resource_collection_->SetClient(NULL);
 349
 350       if (resource_collection_->LoseAllResources())
 351         SendReturnedDelegatedResources(last_output_surface_id_);
 352
 353       resource_collection_ = NULL;
 354     }
 355     last_output_surface_id_ = output_surface_id;
 356   }
 357   bool immediate_ack = !compositor_;
 358   pending_delegated_ack_count_++;
 359
 360   if (frame_size.IsEmpty()) {
 361     DCHECK(frame_data->resource_list.empty());
 362     EvictDelegatedFrame();
 363   } else {
 364     if (use_surfaces_) {
 365       ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
 366       cc::SurfaceManager* manager = factory->GetSurfaceManager();
 367       if (!surface_factory_) {
 368         id_allocator_ =
 369             factory->GetContextFactory()->CreateSurfaceIdAllocator();
 370         surface_factory_ =
 371             make_scoped_ptr(new cc::SurfaceFactory(manager, this));
 372       }
 373       if (surface_id_.is_null() || frame_size != current_surface_size_ ||
 374           frame_size_in_dip != current_frame_size_in_dip_) {
 375         if (!surface_id_.is_null())
 376           surface_factory_->Destroy(surface_id_);
 377         surface_id_ = id_allocator_->GenerateId();
 378         surface_factory_->Create(surface_id_);
 379         // manager must outlive compositors using it.
 380         client_->DelegatedFrameHostGetLayer()->SetShowSurface(
 381             surface_id_,
 382             base::Bind(&SatisfyCallback, base::Unretained(manager)),
 383             base::Bind(&RequireCallback, base::Unretained(manager)), frame_size,
 384             frame_device_scale_factor, frame_size_in_dip);
 385         current_surface_size_ = frame_size;
 386         current_scale_factor_ = frame_device_scale_factor;
 387       }
 388       scoped_ptr<cc::CompositorFrame> compositor_frame =
 389           make_scoped_ptr(new cc::CompositorFrame());
 390       compositor_frame->delegated_frame_data = frame_data.Pass();
 391
 392       compositor_frame->metadata.latency_info.swap(skipped_latency_info_list_);
 393       compositor_frame->metadata.latency_info.insert(
 394           compositor_frame->metadata.latency_info.end(),
 395           latency_info.begin(),
 396           latency_info.end());
 397
 398       gfx::Size desired_size = client_->DelegatedFrameHostDesiredSizeInDIP();
 399       if (desired_size != frame_size_in_dip && !desired_size.IsEmpty())
 400         immediate_ack = true;
 401
 402       cc::SurfaceFactory::DrawCallback ack_callback;
 403       if (compositor_ && !immediate_ack) {
 404         ack_callback = base::Bind(&DelegatedFrameHost::SurfaceDrawn,
 405                                   AsWeakPtr(), output_surface_id);
 406       }
 407       surface_factory_->SubmitFrame(
 408           surface_id_, compositor_frame.Pass(), ack_callback);
 409     } else {
 410       if (!resource_collection_.get()) {
 411         resource_collection_ = new cc::DelegatedFrameResourceCollection;
 412         resource_collection_->SetClient(this);
 413       }
 414       // If the physical frame size changes, we need a new |frame_provider_|. If
 415       // the physical frame size is the same, but the size in DIP changed, we
 416       // need to adjust the scale at which the frames will be drawn, and we do
 417       // this by making a new |frame_provider_| also to ensure the scale change
 418       // is presented in sync with the new frame content.
 419       if (!frame_provider_.get() ||
 420           frame_size != frame_provider_->frame_size() ||
 421           frame_size_in_dip != current_frame_size_in_dip_) {
 422         frame_provider_ = new cc::DelegatedFrameProvider(
 423             resource_collection_.get(), frame_data.Pass());
 424         client_->DelegatedFrameHostGetLayer()->SetShowDelegatedContent(
 425             frame_provider_.get(), frame_size_in_dip);
 426       } else {
 427         frame_provider_->SetFrameData(frame_data.Pass());
 428       }
 429     }
 430   }
 431   released_front_lock_ = NULL;
 432   current_frame_size_in_dip_ = frame_size_in_dip;
 433   CheckResizeLock();
 434
 435   if (!damage_rect_in_dip.IsEmpty())
 436     client_->DelegatedFrameHostGetLayer()->OnDelegatedFrameDamage(
 437         damage_rect_in_dip);
 438
 439   if (immediate_ack) {
 440     SendDelegatedFrameAck(output_surface_id);
 441   } else if (!use_surfaces_) {
 442     std::vector<ui::LatencyInfo>::const_iterator it;
 443     for (it = latency_info.begin(); it != latency_info.end(); ++it)
 444       compositor_->SetLatencyInfo(*it);
 445     // If we've previously skipped any latency infos add them.
 446     for (it = skipped_latency_info_list_.begin();
 447         it != skipped_latency_info_list_.end();
 448         ++it)
 449       compositor_->SetLatencyInfo(*it);
 450     skipped_latency_info_list_.clear();
 451     AddOnCommitCallbackAndDisableLocks(
 452         base::Bind(&DelegatedFrameHost::SendDelegatedFrameAck,
 453                    AsWeakPtr(), output_surface_id));
 454   } else {
 455     AddOnCommitCallbackAndDisableLocks(base::Closure());
 456   }
 457   DidReceiveFrameFromRenderer(damage_rect);
 458   if (frame_provider_.get() || !surface_id_.is_null())
 459     delegated_frame_evictor_->SwappedFrame(
 460         client_->DelegatedFrameHostIsVisible());
 461   // Note: the frame may have been evicted immediately.
 462 }
 463
 464 void DelegatedFrameHost::SendDelegatedFrameAck(uint32 output_surface_id) {
 465   cc::CompositorFrameAck ack;
 466   if (!surface_returned_resources_.empty())
 467     ack.resources.swap(surface_returned_resources_);
 468   if (resource_collection_.get())
 469     resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
 470   client_->DelegatedFrameHostSendCompositorSwapAck(output_surface_id, ack);
 471   DCHECK_GT(pending_delegated_ack_count_, 0);
 472   pending_delegated_ack_count_--;
 473 }
 474
 475 void DelegatedFrameHost::SurfaceDrawn(uint32 output_surface_id,
 476                                       cc::SurfaceDrawStatus drawn) {
 477   SendDelegatedFrameAck(output_surface_id);
 478 }
 479
 480 void DelegatedFrameHost::UnusedResourcesAreAvailable() {
 481   if (pending_delegated_ack_count_)
 482     return;
 483
 484   SendReturnedDelegatedResources(last_output_surface_id_);
 485 }
 486
 487 void DelegatedFrameHost::SendReturnedDelegatedResources(
 488     uint32 output_surface_id) {
 489   cc::CompositorFrameAck ack;
 490   if (!surface_returned_resources_.empty()) {
 491     ack.resources.swap(surface_returned_resources_);
 492   } else {
 493     DCHECK(resource_collection_.get());
 494     resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
 495   }
 496   DCHECK(!ack.resources.empty());
 497
 498   client_->DelegatedFrameHostSendReclaimCompositorResources(output_surface_id,
 499                                                             ack);
 500 }
 501
 502 void DelegatedFrameHost::ReturnResources(
 503     const cc::ReturnedResourceArray& resources) {
 504   if (resources.empty())
 505     return;
 506   std::copy(resources.begin(),
 507             resources.end(),
 508             std::back_inserter(surface_returned_resources_));
 509   if (!pending_delegated_ack_count_)
 510     SendReturnedDelegatedResources(last_output_surface_id_);
 511 }
 512
 513 void DelegatedFrameHost::EvictDelegatedFrame() {
 514   client_->DelegatedFrameHostGetLayer()->SetShowSolidColorContent();
 515   frame_provider_ = NULL;
 516   if (!surface_id_.is_null()) {
 517     surface_factory_->Destroy(surface_id_);
 518     surface_id_ = cc::SurfaceId();
 519   }
 520   delegated_frame_evictor_->DiscardedFrame();
 521 }
 522
 523 // static
 524 void DelegatedFrameHost::CopyFromCompositingSurfaceHasResult(
 525     const gfx::Size& dst_size_in_pixel,
 526     const SkColorType color_type,
 527     ReadbackRequestCallback& callback,
 528     scoped_ptr<cc::CopyOutputResult> result) {
 529   if (result->IsEmpty() || result->size().IsEmpty()) {
 530     callback.Run(SkBitmap(), content::READBACK_FAILED);
 531     return;
 532   }
 533
 534   gfx::Size output_size_in_pixel;
 535   if (dst_size_in_pixel.IsEmpty())
 536     output_size_in_pixel = result->size();
 537   else
 538     output_size_in_pixel = dst_size_in_pixel;
 539
 540   if (result->HasTexture()) {
 541     // GPU-accelerated path
 542     PrepareTextureCopyOutputResult(output_size_in_pixel, color_type,
 543                                    callback,
 544                                    result.Pass());
 545     return;
 546   }
 547
 548   DCHECK(result->HasBitmap());
 549   // Software path
 550   PrepareBitmapCopyOutputResult(output_size_in_pixel, color_type, callback,
 551                                 result.Pass());
 552 }
 553
 554 static void CopyFromCompositingSurfaceFinished(
 555     ReadbackRequestCallback& callback,
 556     scoped_ptr<cc::SingleReleaseCallback> release_callback,
 557     scoped_ptr<SkBitmap> bitmap,
 558     scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
 559     bool result) {
 560   bitmap_pixels_lock.reset();
 561
 562   uint32 sync_point = 0;
 563   if (result) {
 564     GLHelper* gl_helper = ImageTransportFactory::GetInstance()->GetGLHelper();
 565     if (gl_helper)
 566       sync_point = gl_helper->InsertSyncPoint();
 567   }
 568   bool lost_resource = sync_point == 0;
 569   release_callback->Run(sync_point, lost_resource);
 570
 571   callback.Run(*bitmap,
 572                result ? content::READBACK_SUCCESS : content::READBACK_FAILED);
 573 }
 574
 575 // static
 576 void DelegatedFrameHost::PrepareTextureCopyOutputResult(
 577     const gfx::Size& dst_size_in_pixel,
 578     const SkColorType color_type,
 579     ReadbackRequestCallback& callback,
 580     scoped_ptr<cc::CopyOutputResult> result) {
 581   DCHECK(result->HasTexture());
 582   base::ScopedClosureRunner scoped_callback_runner(
 583       base::Bind(callback, SkBitmap(), content::READBACK_FAILED));
 584
 585   // TODO(sikugu): We should be able to validate the format here using
 586   // GLHelper::IsReadbackConfigSupported before we processs the result.
 587   // See crbug.com/415682.
 588   scoped_ptr<SkBitmap> bitmap(new SkBitmap);
 589   if (!bitmap->tryAllocPixels(SkImageInfo::Make(dst_size_in_pixel.width(),
 590                                                 dst_size_in_pixel.height(),
 591                                                 color_type,
 592                                                 kOpaque_SkAlphaType)))
 593     return;
 594
 595   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
 596   GLHelper* gl_helper = factory->GetGLHelper();
 597   if (!gl_helper)
 598     return;
 599
 600   scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock(
 601       new SkAutoLockPixels(*bitmap));
 602   uint8* pixels = static_cast<uint8*>(bitmap->getPixels());
 603
 604   cc::TextureMailbox texture_mailbox;
 605   scoped_ptr<cc::SingleReleaseCallback> release_callback;
 606   result->TakeTexture(&texture_mailbox, &release_callback);
 607   DCHECK(texture_mailbox.IsTexture());
 608
 609   ignore_result(scoped_callback_runner.Release());
 610
 611   gl_helper->CropScaleReadbackAndCleanMailbox(
 612       texture_mailbox.mailbox(),
 613       texture_mailbox.sync_point(),
 614       result->size(),
 615       gfx::Rect(result->size()),
 616       dst_size_in_pixel,
 617       pixels,
 618       color_type,
 619       base::Bind(&CopyFromCompositingSurfaceFinished,
 620                  callback,
 621                  base::Passed(&release_callback),
 622                  base::Passed(&bitmap),
 623                  base::Passed(&bitmap_pixels_lock)),
 624       GLHelper::SCALER_QUALITY_GOOD);
 625 }
 626
 627 // static
 628 void DelegatedFrameHost::PrepareBitmapCopyOutputResult(
 629     const gfx::Size& dst_size_in_pixel,
 630     const SkColorType color_type,
 631     ReadbackRequestCallback& callback,
 632     scoped_ptr<cc::CopyOutputResult> result) {
 633   if (color_type != kN32_SkColorType && color_type != kAlpha_8_SkColorType) {
 634     NOTIMPLEMENTED();
 635     callback.Run(SkBitmap(), READBACK_FORMAT_NOT_SUPPORTED);
 636     return;
 637   }
 638   DCHECK(result->HasBitmap());
 639   scoped_ptr<SkBitmap> source = result->TakeBitmap();
 640   DCHECK(source);
 641   SkBitmap scaled_bitmap;
 642   if (source->width() != dst_size_in_pixel.width() ||
 643       source->height() != dst_size_in_pixel.height()) {
 644     scaled_bitmap =
 645         skia::ImageOperations::Resize(*source,
 646                                       skia::ImageOperations::RESIZE_BEST,
 647                                       dst_size_in_pixel.width(),
 648                                       dst_size_in_pixel.height());
 649   } else {
 650     scaled_bitmap = *source;
 651   }
 652   if (color_type == kN32_SkColorType) {
 653     DCHECK_EQ(scaled_bitmap.colorType(), kN32_SkColorType);
 654     callback.Run(scaled_bitmap, READBACK_SUCCESS);
 655     return;
 656   }
 657   DCHECK_EQ(color_type, kAlpha_8_SkColorType);
 658   // The software path currently always returns N32 bitmap regardless of the
 659   // |color_type| we ask for.
 660   DCHECK_EQ(scaled_bitmap.colorType(), kN32_SkColorType);
 661   // Paint |scaledBitmap| to alpha-only |grayscale_bitmap|.
 662   SkBitmap grayscale_bitmap;
 663   bool success = grayscale_bitmap.tryAllocPixels(
 664       SkImageInfo::MakeA8(scaled_bitmap.width(), scaled_bitmap.height()));
 665   if (!success) {
 666     callback.Run(SkBitmap(), content::READBACK_MEMORY_ALLOCATION_FAILURE);
 667     return;
 668   }
 669   SkCanvas canvas(grayscale_bitmap);
 670   SkPaint paint;
 671   skia::RefPtr<SkColorFilter> filter =
 672       skia::AdoptRef(SkLumaColorFilter::Create());
 673   paint.setColorFilter(filter.get());
 674   canvas.drawBitmap(scaled_bitmap, SkIntToScalar(0), SkIntToScalar(0), &paint);
 675   callback.Run(grayscale_bitmap, READBACK_SUCCESS);
 676 }
 677
 678 // static
 679 void DelegatedFrameHost::ReturnSubscriberTexture(
 680     base::WeakPtr<DelegatedFrameHost> dfh,
 681     scoped_refptr<OwnedMailbox> subscriber_texture,
 682     uint32 sync_point) {
 683   if (!subscriber_texture.get())
 684     return;
 685   if (!dfh)
 686     return;
 687
 688   subscriber_texture->UpdateSyncPoint(sync_point);
 689
 690   if (dfh->frame_subscriber_ && subscriber_texture->texture_id())
 691     dfh->idle_frame_subscriber_textures_.push_back(subscriber_texture);
 692 }
 693
 694 // static
 695 void DelegatedFrameHost::CopyFromCompositingSurfaceFinishedForVideo(
 696     base::WeakPtr<DelegatedFrameHost> dfh,
 697     const base::Callback<void(bool)>& callback,
 698     scoped_refptr<OwnedMailbox> subscriber_texture,
 699     scoped_ptr<cc::SingleReleaseCallback> release_callback,
 700     bool result) {
 701   callback.Run(result);
 702
 703   uint32 sync_point = 0;
 704   if (result) {
 705     GLHelper* gl_helper = ImageTransportFactory::GetInstance()->GetGLHelper();
 706     sync_point = gl_helper->InsertSyncPoint();
 707   }
 708   if (release_callback) {
 709     // A release callback means the texture came from the compositor, so there
 710     // should be no |subscriber_texture|.
 711     DCHECK(!subscriber_texture.get());
 712     bool lost_resource = sync_point == 0;
 713     release_callback->Run(sync_point, lost_resource);
 714   }
 715   ReturnSubscriberTexture(dfh, subscriber_texture, sync_point);
 716 }
 717
 718 // static
 719 void DelegatedFrameHost::CopyFromCompositingSurfaceHasResultForVideo(
 720     base::WeakPtr<DelegatedFrameHost> dfh,
 721     scoped_refptr<OwnedMailbox> subscriber_texture,
 722     scoped_refptr<media::VideoFrame> video_frame,
 723     const base::Callback<void(bool)>& callback,
 724     scoped_ptr<cc::CopyOutputResult> result) {
 725   base::ScopedClosureRunner scoped_callback_runner(base::Bind(callback, false));
 726   base::ScopedClosureRunner scoped_return_subscriber_texture(
 727       base::Bind(&ReturnSubscriberTexture, dfh, subscriber_texture, 0));
 728
 729   if (!dfh)
 730     return;
 731   if (result->IsEmpty())
 732     return;
 733   if (result->size().IsEmpty())
 734     return;
 735
 736   // Compute the dest size we want after the letterboxing resize. Make the
 737   // coordinates and sizes even because we letterbox in YUV space
 738   // (see CopyRGBToVideoFrame). They need to be even for the UV samples to
 739   // line up correctly.
 740   // The video frame's visible_rect() and the result's size() are both physical
 741   // pixels.
 742   gfx::Rect region_in_frame = media::ComputeLetterboxRegion(
 743       video_frame->visible_rect(), result->size());
 744   region_in_frame = gfx::Rect(region_in_frame.x() & ~1,
 745                               region_in_frame.y() & ~1,
 746                               region_in_frame.width() & ~1,
 747                               region_in_frame.height() & ~1);
 748   if (region_in_frame.IsEmpty())
 749     return;
 750
 751   if (!result->HasTexture()) {
 752     DCHECK(result->HasBitmap());
 753     scoped_ptr<SkBitmap> bitmap = result->TakeBitmap();
 754     // Scale the bitmap to the required size, if necessary.
 755     SkBitmap scaled_bitmap;
 756     if (result->size() != region_in_frame.size()) {
 757       skia::ImageOperations::ResizeMethod method =
 758           skia::ImageOperations::RESIZE_GOOD;
 759       scaled_bitmap = skia::ImageOperations::Resize(*bitmap.get(), method,
 760                                                     region_in_frame.width(),
 761                                                     region_in_frame.height());
 762     } else {
 763       scaled_bitmap = *bitmap.get();
 764     }
 765
 766     {
 767       SkAutoLockPixels scaled_bitmap_locker(scaled_bitmap);
 768
 769       media::CopyRGBToVideoFrame(
 770           reinterpret_cast<uint8*>(scaled_bitmap.getPixels()),
 771           scaled_bitmap.rowBytes(),
 772           region_in_frame,
 773           video_frame.get());
 774     }
 775     ignore_result(scoped_callback_runner.Release());
 776     callback.Run(true);
 777     return;
 778   }
 779
 780   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
 781   GLHelper* gl_helper = factory->GetGLHelper();
 782   if (!gl_helper)
 783     return;
 784   if (subscriber_texture.get() && !subscriber_texture->texture_id())
 785     return;
 786
 787   cc::TextureMailbox texture_mailbox;
 788   scoped_ptr<cc::SingleReleaseCallback> release_callback;
 789   result->TakeTexture(&texture_mailbox, &release_callback);
 790   DCHECK(texture_mailbox.IsTexture());
 791
 792   gfx::Rect result_rect(result->size());
 793
 794   content::ReadbackYUVInterface* yuv_readback_pipeline =
 795       dfh->yuv_readback_pipeline_.get();
 796   if (yuv_readback_pipeline == NULL ||
 797       yuv_readback_pipeline->scaler()->SrcSize() != result_rect.size() ||
 798       yuv_readback_pipeline->scaler()->SrcSubrect() != result_rect ||
 799       yuv_readback_pipeline->scaler()->DstSize() != region_in_frame.size()) {
 800     GLHelper::ScalerQuality quality = GLHelper::SCALER_QUALITY_FAST;
 801     std::string quality_switch = switches::kTabCaptureDownscaleQuality;
 802     // If we're scaling up, we can use the "best" quality.
 803     if (result_rect.size().width() < region_in_frame.size().width() &&
 804         result_rect.size().height() < region_in_frame.size().height())
 805       quality_switch = switches::kTabCaptureUpscaleQuality;
 806
 807     std::string switch_value =
 808         base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 809             quality_switch);
 810     if (switch_value == "fast")
 811       quality = GLHelper::SCALER_QUALITY_FAST;
 812     else if (switch_value == "good")
 813       quality = GLHelper::SCALER_QUALITY_GOOD;
 814     else if (switch_value == "best")
 815       quality = GLHelper::SCALER_QUALITY_BEST;
 816
 817     dfh->yuv_readback_pipeline_.reset(
 818         gl_helper->CreateReadbackPipelineYUV(quality,
 819                                              result_rect.size(),
 820                                              result_rect,
 821                                              region_in_frame.size(),
 822                                              true,
 823                                              true));
 824     yuv_readback_pipeline = dfh->yuv_readback_pipeline_.get();
 825   }
 826
 827   ignore_result(scoped_callback_runner.Release());
 828   ignore_result(scoped_return_subscriber_texture.Release());
 829   base::Callback<void(bool result)> finished_callback = base::Bind(
 830       &DelegatedFrameHost::CopyFromCompositingSurfaceFinishedForVideo,
 831       dfh->AsWeakPtr(),
 832       callback,
 833       subscriber_texture,
 834       base::Passed(&release_callback));
 835   yuv_readback_pipeline->ReadbackYUV(texture_mailbox.mailbox(),
 836                                      texture_mailbox.sync_point(),
 837                                      video_frame.get(),
 838                                      region_in_frame.origin(),
 839                                      finished_callback);
 840 }
 841
 842 ////////////////////////////////////////////////////////////////////////////////
 843 // DelegatedFrameHost, ui::CompositorObserver implementation:
 844
 845 void DelegatedFrameHost::OnCompositingDidCommit(
 846     ui::Compositor* compositor) {
 847   if (can_lock_compositor_ == NO_PENDING_COMMIT) {
 848     can_lock_compositor_ = YES_CAN_LOCK;
 849     if (resize_lock_.get() && resize_lock_->GrabDeferredLock())
 850       can_lock_compositor_ = YES_DID_LOCK;
 851   }
 852   RunOnCommitCallbacks();
 853   if (resize_lock_ &&
 854       resize_lock_->expected_size() == current_frame_size_in_dip_) {
 855     resize_lock_.reset();
 856     client_->DelegatedFrameHostResizeLockWasReleased();
 857     // We may have had a resize while we had the lock (e.g. if the lock expired,
 858     // or if the UI still gave us some resizes), so make sure we grab a new lock
 859     // if necessary.
 860     MaybeCreateResizeLock();
 861   }
 862 }
 863
 864 void DelegatedFrameHost::OnCompositingStarted(
 865     ui::Compositor* compositor, base::TimeTicks start_time) {
 866   last_draw_ended_ = start_time;
 867 }
 868
 869 void DelegatedFrameHost::OnCompositingEnded(
 870     ui::Compositor* compositor) {
 871 }
 872
 873 void DelegatedFrameHost::OnCompositingAborted(ui::Compositor* compositor) {
 874 }
 875
 876 void DelegatedFrameHost::OnCompositingLockStateChanged(
 877     ui::Compositor* compositor) {
 878   // A compositor lock that is part of a resize lock timed out. We
 879   // should display a renderer frame.
 880   if (!compositor->IsLocked() && can_lock_compositor_ == YES_DID_LOCK) {
 881     can_lock_compositor_ = NO_PENDING_RENDERER_FRAME;
 882   }
 883 }
 884
 885 void DelegatedFrameHost::OnCompositingShuttingDown(ui::Compositor* compositor) {
 886   DCHECK_EQ(compositor, compositor_);
 887   ResetCompositor();
 888   DCHECK(!compositor_);
 889 }
 890
 891 void DelegatedFrameHost::OnUpdateVSyncParameters(
 892     base::TimeTicks timebase,
 893     base::TimeDelta interval) {
 894   vsync_timebase_ = timebase;
 895   vsync_interval_ = interval;
 896   if (client_->DelegatedFrameHostIsVisible())
 897     client_->DelegatedFrameHostUpdateVSyncParameters(timebase, interval);
 898 }
 899
 900 ////////////////////////////////////////////////////////////////////////////////
 901 // DelegatedFrameHost, ImageTransportFactoryObserver implementation:
 902
 903 void DelegatedFrameHost::OnLostResources() {
 904   if (frame_provider_.get() || !surface_id_.is_null())
 905     EvictDelegatedFrame();
 906   idle_frame_subscriber_textures_.clear();
 907   yuv_readback_pipeline_.reset();
 908
 909   client_->DelegatedFrameHostOnLostCompositorResources();
 910 }
 911
 912 ////////////////////////////////////////////////////////////////////////////////
 913 // DelegatedFrameHost, private:
 914
 915 DelegatedFrameHost::~DelegatedFrameHost() {
 916   DCHECK(!compositor_);
 917   ImageTransportFactory::GetInstance()->RemoveObserver(this);
 918
 919   if (!surface_id_.is_null())
 920     surface_factory_->Destroy(surface_id_);
 921   if (resource_collection_.get())
 922     resource_collection_->SetClient(NULL);
 923
 924   DCHECK(!vsync_manager_.get());
 925 }
 926
 927 void DelegatedFrameHost::RunOnCommitCallbacks() {
 928   for (std::vector<base::Closure>::const_iterator
 929       it = on_compositing_did_commit_callbacks_.begin();
 930       it != on_compositing_did_commit_callbacks_.end(); ++it) {
 931     it->Run();
 932   }
 933   on_compositing_did_commit_callbacks_.clear();
 934 }
 935
 936 void DelegatedFrameHost::AddOnCommitCallbackAndDisableLocks(
 937     const base::Closure& callback) {
 938   DCHECK(compositor_);
 939
 940   can_lock_compositor_ = NO_PENDING_COMMIT;
 941   if (!callback.is_null())
 942     on_compositing_did_commit_callbacks_.push_back(callback);
 943 }
 944
 945 void DelegatedFrameHost::SetCompositor(ui::Compositor* compositor) {
 946   DCHECK(!compositor_);
 947   if (!compositor)
 948     return;
 949   compositor_ = compositor;
 950   compositor_->AddObserver(this);
 951   DCHECK(!vsync_manager_.get());
 952   vsync_manager_ = compositor_->vsync_manager();
 953   vsync_manager_->AddObserver(this);
 954 }
 955
 956 void DelegatedFrameHost::ResetCompositor() {
 957   if (!compositor_)
 958     return;
 959   RunOnCommitCallbacks();
 960   if (resize_lock_) {
 961     resize_lock_.reset();
 962     client_->DelegatedFrameHostResizeLockWasReleased();
 963   }
 964   if (compositor_->HasObserver(this))
 965     compositor_->RemoveObserver(this);
 966   if (vsync_manager_.get()) {
 967     vsync_manager_->RemoveObserver(this);
 968     vsync_manager_ = NULL;
 969   }
 970   compositor_ = nullptr;
 971 }
 972
 973 void DelegatedFrameHost::LockResources() {
 974   DCHECK(frame_provider_.get() || !surface_id_.is_null());
 975   delegated_frame_evictor_->LockFrame();
 976 }
 977
 978 void DelegatedFrameHost::RequestCopyOfOutput(
 979     scoped_ptr<cc::CopyOutputRequest> request) {
 980   if (!request_copy_of_output_callback_for_testing_.is_null())
 981     request_copy_of_output_callback_for_testing_.Run(request.Pass());
 982   else
 983     client_->DelegatedFrameHostGetLayer()->RequestCopyOfOutput(request.Pass());
 984 }
 985
 986 void DelegatedFrameHost::UnlockResources() {
 987   DCHECK(frame_provider_.get() || !surface_id_.is_null());
 988   delegated_frame_evictor_->UnlockFrame();
 989 }
 990
 991 ////////////////////////////////////////////////////////////////////////////////
 992 // DelegatedFrameHost, ui::LayerOwnerDelegate implementation:
 993
 994 void DelegatedFrameHost::OnLayerRecreated(ui::Layer* old_layer,
 995                                                 ui::Layer* new_layer) {
 996   // The new_layer is the one that will be used by our Window, so that's the one
 997   // that should keep our frame. old_layer will be returned to the
 998   // RecreateLayer caller, and should have a copy.
 999   if (frame_provider_.get()) {
1000     new_layer->SetShowDelegatedContent(frame_provider_.get(),
1001                                        current_frame_size_in_dip_);
1002   }
1003   if (!surface_id_.is_null()) {
1004     ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
1005     cc::SurfaceManager* manager = factory->GetSurfaceManager();
1006     new_layer->SetShowSurface(
1007         surface_id_, base::Bind(&SatisfyCallback, base::Unretained(manager)),
1008         base::Bind(&RequireCallback, base::Unretained(manager)),
1009         current_surface_size_, current_scale_factor_,
1010         current_frame_size_in_dip_);
1011   }
1012 }
1013
1014 }  // namespace content