| // Copyright 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "cc/trees/single_thread_proxy.h" |
| |
| #include "base/auto_reset.h" |
| #include "base/debug/trace_event.h" |
| #include "cc/output/context_provider.h" |
| #include "cc/output/output_surface.h" |
| #include "cc/quads/draw_quad.h" |
| #include "cc/resources/prioritized_resource_manager.h" |
| #include "cc/resources/resource_update_controller.h" |
| #include "cc/trees/layer_tree_host.h" |
| #include "cc/trees/layer_tree_impl.h" |
| |
| namespace cc { |
| |
| scoped_ptr<Proxy> SingleThreadProxy::Create(LayerTreeHost* layer_tree_host) { |
| return make_scoped_ptr( |
| new SingleThreadProxy(layer_tree_host)).PassAs<Proxy>(); |
| } |
| |
| SingleThreadProxy::SingleThreadProxy(LayerTreeHost* layer_tree_host) |
| : Proxy(NULL), |
| layer_tree_host_(layer_tree_host), |
| created_offscreen_context_provider_(false), |
| next_frame_is_newly_committed_frame_(false), |
| inside_draw_(false) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SingleThreadProxy"); |
| DCHECK(Proxy::IsMainThread()); |
| DCHECK(layer_tree_host); |
| |
| // Impl-side painting not supported without threaded compositing. |
| CHECK(!layer_tree_host->settings().impl_side_painting) |
| << "Threaded compositing must be enabled to use impl-side painting."; |
| } |
| |
| void SingleThreadProxy::Start(scoped_ptr<OutputSurface> first_output_surface) { |
| DCHECK(first_output_surface); |
| DebugScopedSetImplThread impl(this); |
| layer_tree_host_impl_ = layer_tree_host_->CreateLayerTreeHostImpl(this); |
| first_output_surface_ = first_output_surface.Pass(); |
| } |
| |
| SingleThreadProxy::~SingleThreadProxy() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::~SingleThreadProxy"); |
| DCHECK(Proxy::IsMainThread()); |
| // Make sure Stop() got called or never Started. |
| DCHECK(!layer_tree_host_impl_); |
| } |
| |
| bool SingleThreadProxy::CompositeAndReadback(void* pixels, gfx::Rect rect) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::CompositeAndReadback"); |
| DCHECK(Proxy::IsMainThread()); |
| |
| gfx::Rect device_viewport_damage_rect = rect; |
| |
| LayerTreeHostImpl::FrameData frame; |
| if (!CommitAndComposite(base::TimeTicks::Now(), |
| device_viewport_damage_rect, |
| true, // for_readback |
| &frame)) |
| return false; |
| |
| { |
| DebugScopedSetImplThread impl(this); |
| layer_tree_host_impl_->Readback(pixels, rect); |
| |
| if (layer_tree_host_impl_->IsContextLost()) |
| return false; |
| |
| layer_tree_host_impl_->SwapBuffers(frame); |
| } |
| DidSwapFrame(); |
| |
| return true; |
| } |
| |
| void SingleThreadProxy::FinishAllRendering() { |
| DCHECK(Proxy::IsMainThread()); |
| { |
| DebugScopedSetImplThread impl(this); |
| layer_tree_host_impl_->FinishAllRendering(); |
| } |
| } |
| |
| bool SingleThreadProxy::IsStarted() const { |
| DCHECK(Proxy::IsMainThread()); |
| return layer_tree_host_impl_; |
| } |
| |
| void SingleThreadProxy::SetLayerTreeHostClientReady() { |
| // Scheduling is controlled by the embedder in the single thread case, so |
| // nothing to do. |
| } |
| |
| void SingleThreadProxy::SetVisible(bool visible) { |
| DebugScopedSetImplThread impl(this); |
| layer_tree_host_impl_->SetVisible(visible); |
| } |
| |
| void SingleThreadProxy::CreateAndInitializeOutputSurface() { |
| TRACE_EVENT0( |
| "cc", "SingleThreadProxy::CreateAndInitializeOutputSurface"); |
| DCHECK(Proxy::IsMainThread()); |
| |
| scoped_ptr<OutputSurface> output_surface = first_output_surface_.Pass(); |
| if (!output_surface) |
| output_surface = layer_tree_host_->CreateOutputSurface(); |
| if (!output_surface) { |
| OnOutputSurfaceInitializeAttempted(false); |
| return; |
| } |
| |
| scoped_refptr<cc::ContextProvider> offscreen_context_provider; |
| if (created_offscreen_context_provider_) { |
| offscreen_context_provider = |
| layer_tree_host_->client()->OffscreenContextProviderForMainThread(); |
| if (!offscreen_context_provider.get()) { |
| OnOutputSurfaceInitializeAttempted(false); |
| return; |
| } |
| } |
| |
| { |
| DebugScopedSetMainThreadBlocked mainThreadBlocked(this); |
| DebugScopedSetImplThread impl(this); |
| layer_tree_host_->DeleteContentsTexturesOnImplThread( |
| layer_tree_host_impl_->resource_provider()); |
| } |
| |
| bool initialized; |
| { |
| DebugScopedSetImplThread impl(this); |
| |
| DCHECK(output_surface); |
| initialized = layer_tree_host_impl_->InitializeRenderer( |
| output_surface.Pass()); |
| if (initialized) { |
| renderer_capabilities_for_main_thread_ = |
| layer_tree_host_impl_->GetRendererCapabilities(); |
| |
| layer_tree_host_impl_->resource_provider()-> |
| set_offscreen_context_provider(offscreen_context_provider); |
| } else if (offscreen_context_provider.get()) { |
| offscreen_context_provider->VerifyContexts(); |
| } |
| } |
| |
| OnOutputSurfaceInitializeAttempted(initialized); |
| } |
| |
| void SingleThreadProxy::OnOutputSurfaceInitializeAttempted(bool success) { |
| LayerTreeHost::CreateResult result = |
| layer_tree_host_->OnCreateAndInitializeOutputSurfaceAttempted(success); |
| if (result == LayerTreeHost::CreateFailedButTryAgain) { |
| // Force another recreation attempt to happen by requesting another commit. |
| SetNeedsCommit(); |
| } |
| } |
| |
| const RendererCapabilities& SingleThreadProxy::GetRendererCapabilities() const { |
| DCHECK(Proxy::IsMainThread()); |
| DCHECK(!layer_tree_host_->output_surface_lost()); |
| return renderer_capabilities_for_main_thread_; |
| } |
| |
| void SingleThreadProxy::SetNeedsAnimate() { |
| // Thread-only feature. |
| NOTREACHED(); |
| } |
| |
| void SingleThreadProxy::SetNeedsUpdateLayers() { |
| DCHECK(Proxy::IsMainThread()); |
| layer_tree_host_->ScheduleComposite(); |
| } |
| |
| void SingleThreadProxy::DoCommit(scoped_ptr<ResourceUpdateQueue> queue) { |
| DCHECK(Proxy::IsMainThread()); |
| // Commit immediately. |
| { |
| DebugScopedSetMainThreadBlocked mainThreadBlocked(this); |
| DebugScopedSetImplThread impl(this); |
| |
| RenderingStatsInstrumentation* stats_instrumentation = |
| layer_tree_host_->rendering_stats_instrumentation(); |
| base::TimeTicks start_time = stats_instrumentation->StartRecording(); |
| |
| layer_tree_host_impl_->BeginCommit(); |
| |
| if (layer_tree_host_->contents_texture_manager()) { |
| layer_tree_host_->contents_texture_manager()-> |
| PushTexturePrioritiesToBackings(); |
| } |
| layer_tree_host_->BeginCommitOnImplThread(layer_tree_host_impl_.get()); |
| |
| scoped_ptr<ResourceUpdateController> update_controller = |
| ResourceUpdateController::Create( |
| NULL, |
| Proxy::MainThreadTaskRunner(), |
| queue.Pass(), |
| layer_tree_host_impl_->resource_provider()); |
| update_controller->Finalize(); |
| |
| layer_tree_host_->FinishCommitOnImplThread(layer_tree_host_impl_.get()); |
| |
| layer_tree_host_impl_->CommitComplete(); |
| |
| #ifndef NDEBUG |
| // In the single-threaded case, the scale and scroll deltas should never be |
| // touched on the impl layer tree. |
| scoped_ptr<ScrollAndScaleSet> scroll_info = |
| layer_tree_host_impl_->ProcessScrollDeltas(); |
| DCHECK(!scroll_info->scrolls.size()); |
| DCHECK_EQ(1.f, scroll_info->page_scale_delta); |
| #endif |
| |
| base::TimeDelta duration = stats_instrumentation->EndRecording(start_time); |
| stats_instrumentation->AddCommit(duration); |
| } |
| layer_tree_host_->CommitComplete(); |
| next_frame_is_newly_committed_frame_ = true; |
| } |
| |
| void SingleThreadProxy::SetNeedsCommit() { |
| DCHECK(Proxy::IsMainThread()); |
| layer_tree_host_->ScheduleComposite(); |
| } |
| |
| void SingleThreadProxy::SetNeedsRedraw(gfx::Rect damage_rect) { |
| SetNeedsRedrawRectOnImplThread(damage_rect); |
| } |
| |
| void SingleThreadProxy::OnHasPendingTreeStateChanged(bool have_pending_tree) { |
| // Thread-only feature. |
| NOTREACHED(); |
| } |
| |
| void SingleThreadProxy::SetDeferCommits(bool defer_commits) { |
| // Thread-only feature. |
| NOTREACHED(); |
| } |
| |
| bool SingleThreadProxy::CommitRequested() const { return false; } |
| |
| size_t SingleThreadProxy::MaxPartialTextureUpdates() const { |
| return std::numeric_limits<size_t>::max(); |
| } |
| |
| void SingleThreadProxy::Stop() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::stop"); |
| DCHECK(Proxy::IsMainThread()); |
| { |
| DebugScopedSetMainThreadBlocked mainThreadBlocked(this); |
| DebugScopedSetImplThread impl(this); |
| |
| layer_tree_host_->DeleteContentsTexturesOnImplThread( |
| layer_tree_host_impl_->resource_provider()); |
| layer_tree_host_impl_.reset(); |
| } |
| layer_tree_host_ = NULL; |
| } |
| |
| void SingleThreadProxy::OnCanDrawStateChanged(bool can_draw) { |
| DCHECK(Proxy::IsImplThread()); |
| layer_tree_host_impl_->UpdateBackgroundAnimateTicking(!ShouldComposite()); |
| } |
| |
| void SingleThreadProxy::SetNeedsRedrawOnImplThread() { |
| layer_tree_host_->ScheduleComposite(); |
| } |
| |
| void SingleThreadProxy::SetNeedsRedrawRectOnImplThread(gfx::Rect damage_rect) { |
| // TODO(brianderson): Once we move render_widget scheduling into this class, |
| // we can treat redraw requests more efficiently than CommitAndRedraw |
| // requests. |
| layer_tree_host_impl_->SetViewportDamage(damage_rect); |
| SetNeedsCommit(); |
| } |
| |
| void SingleThreadProxy::DidInitializeVisibleTileOnImplThread() { |
| // Impl-side painting only. |
| NOTREACHED(); |
| } |
| |
| void SingleThreadProxy::SetNeedsCommitOnImplThread() { |
| layer_tree_host_->ScheduleComposite(); |
| } |
| |
| void SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread( |
| scoped_ptr<AnimationEventsVector> events, |
| base::Time wall_clock_time) { |
| DCHECK(Proxy::IsImplThread()); |
| DebugScopedSetMainThread main(this); |
| layer_tree_host_->SetAnimationEvents(events.Pass(), wall_clock_time); |
| } |
| |
| bool SingleThreadProxy::ReduceContentsTextureMemoryOnImplThread( |
| size_t limit_bytes, |
| int priority_cutoff) { |
| DCHECK(IsImplThread()); |
| if (!layer_tree_host_->contents_texture_manager()) |
| return false; |
| |
| return layer_tree_host_->contents_texture_manager()->ReduceMemoryOnImplThread( |
| limit_bytes, priority_cutoff, layer_tree_host_impl_->resource_provider()); |
| } |
| |
| void SingleThreadProxy::ReduceWastedContentsTextureMemoryOnImplThread() { |
| // Impl-side painting only. |
| NOTREACHED(); |
| } |
| |
| void SingleThreadProxy::SendManagedMemoryStats() { |
| DCHECK(Proxy::IsImplThread()); |
| if (!layer_tree_host_impl_) |
| return; |
| if (!layer_tree_host_->contents_texture_manager()) |
| return; |
| |
| PrioritizedResourceManager* contents_texture_manager = |
| layer_tree_host_->contents_texture_manager(); |
| layer_tree_host_impl_->SendManagedMemoryStats( |
| contents_texture_manager->MemoryVisibleBytes(), |
| contents_texture_manager->MemoryVisibleAndNearbyBytes(), |
| contents_texture_manager->MemoryUseBytes()); |
| } |
| |
| bool SingleThreadProxy::IsInsideDraw() { return inside_draw_; } |
| |
| void SingleThreadProxy::DidTryInitializeRendererOnImplThread( |
| bool success, |
| scoped_refptr<ContextProvider> offscreen_context_provider) { |
| NOTREACHED() |
| << "This is only used on threaded compositing with impl-side painting"; |
| } |
| |
| void SingleThreadProxy::DidLoseOutputSurfaceOnImplThread() { |
| // Cause a commit so we can notice the lost context. |
| SetNeedsCommitOnImplThread(); |
| } |
| |
| // Called by the legacy scheduling path (e.g. where render_widget does the |
| // scheduling) |
| void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) { |
| gfx::Rect device_viewport_damage_rect; |
| |
| LayerTreeHostImpl::FrameData frame; |
| if (CommitAndComposite(frame_begin_time, |
| device_viewport_damage_rect, |
| false, // for_readback |
| &frame)) { |
| layer_tree_host_impl_->SwapBuffers(frame); |
| DidSwapFrame(); |
| } |
| } |
| |
| scoped_ptr<base::Value> SingleThreadProxy::AsValue() const { |
| scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue()); |
| { |
| // The following line casts away const modifiers because it is just |
| // setting debug state. We still want the AsValue() function and its |
| // call chain to be const throughout. |
| DebugScopedSetImplThread impl(const_cast<SingleThreadProxy*>(this)); |
| |
| state->Set("layer_tree_host_impl", |
| layer_tree_host_impl_->AsValue().release()); |
| } |
| return state.PassAs<base::Value>(); |
| } |
| |
| void SingleThreadProxy::ForceSerializeOnSwapBuffers() { |
| { |
| DebugScopedSetImplThread impl(this); |
| if (layer_tree_host_impl_->renderer()) { |
| DCHECK(!layer_tree_host_->output_surface_lost()); |
| layer_tree_host_impl_->renderer()->DoNoOp(); |
| } |
| } |
| } |
| |
| bool SingleThreadProxy::CommitAndComposite( |
| base::TimeTicks frame_begin_time, |
| gfx::Rect device_viewport_damage_rect, |
| bool for_readback, |
| LayerTreeHostImpl::FrameData* frame) { |
| DCHECK(Proxy::IsMainThread()); |
| |
| if (!layer_tree_host_->InitializeOutputSurfaceIfNeeded()) |
| return false; |
| |
| layer_tree_host_->AnimateLayers(frame_begin_time); |
| |
| scoped_refptr<cc::ContextProvider> offscreen_context_provider; |
| if (renderer_capabilities_for_main_thread_.using_offscreen_context3d && |
| layer_tree_host_->needs_offscreen_context()) { |
| offscreen_context_provider = |
| layer_tree_host_->client()->OffscreenContextProviderForMainThread(); |
| if (offscreen_context_provider.get()) |
| created_offscreen_context_provider_ = true; |
| } |
| |
| if (layer_tree_host_->contents_texture_manager()) { |
| layer_tree_host_->contents_texture_manager() |
| ->UnlinkAndClearEvictedBackings(); |
| } |
| |
| scoped_ptr<ResourceUpdateQueue> queue = |
| make_scoped_ptr(new ResourceUpdateQueue); |
| layer_tree_host_->UpdateLayers( |
| queue.get(), layer_tree_host_impl_->memory_allocation_limit_bytes()); |
| |
| layer_tree_host_->WillCommit(); |
| DoCommit(queue.Pass()); |
| bool result = DoComposite(offscreen_context_provider, |
| frame_begin_time, |
| device_viewport_damage_rect, |
| for_readback, |
| frame); |
| layer_tree_host_->DidBeginFrame(); |
| return result; |
| } |
| |
| bool SingleThreadProxy::ShouldComposite() const { |
| DCHECK(Proxy::IsImplThread()); |
| return layer_tree_host_impl_->visible() && |
| layer_tree_host_impl_->CanDraw(); |
| } |
| |
| bool SingleThreadProxy::DoComposite( |
| scoped_refptr<cc::ContextProvider> offscreen_context_provider, |
| base::TimeTicks frame_begin_time, |
| gfx::Rect device_viewport_damage_rect, |
| bool for_readback, |
| LayerTreeHostImpl::FrameData* frame) { |
| DCHECK(!layer_tree_host_->output_surface_lost()); |
| |
| bool lost_output_surface = false; |
| { |
| DebugScopedSetImplThread impl(this); |
| base::AutoReset<bool> mark_inside(&inside_draw_, true); |
| |
| layer_tree_host_impl_->resource_provider()-> |
| set_offscreen_context_provider(offscreen_context_provider); |
| |
| bool can_do_readback = layer_tree_host_impl_->renderer()->CanReadPixels(); |
| |
| // We guard PrepareToDraw() with CanDraw() because it always returns a valid |
| // frame, so can only be used when such a frame is possible. Since |
| // DrawLayers() depends on the result of PrepareToDraw(), it is guarded on |
| // CanDraw() as well. |
| if (!ShouldComposite() || (for_readback && !can_do_readback)) { |
| layer_tree_host_impl_->UpdateBackgroundAnimateTicking(true); |
| return false; |
| } |
| |
| layer_tree_host_impl_->Animate( |
| layer_tree_host_impl_->CurrentFrameTimeTicks(), |
| layer_tree_host_impl_->CurrentFrameTime()); |
| layer_tree_host_impl_->UpdateBackgroundAnimateTicking(false); |
| |
| layer_tree_host_impl_->PrepareToDraw(frame, device_viewport_damage_rect); |
| layer_tree_host_impl_->DrawLayers(frame, frame_begin_time); |
| layer_tree_host_impl_->DidDrawAllLayers(*frame); |
| lost_output_surface = layer_tree_host_impl_->IsContextLost(); |
| |
| bool start_ready_animations = true; |
| layer_tree_host_impl_->UpdateAnimationState(start_ready_animations); |
| |
| layer_tree_host_impl_->ResetCurrentFrameTimeForNextFrame(); |
| } |
| |
| if (lost_output_surface) { |
| cc::ContextProvider* offscreen_contexts = layer_tree_host_impl_-> |
| resource_provider()->offscreen_context_provider(); |
| if (offscreen_contexts) |
| offscreen_contexts->VerifyContexts(); |
| layer_tree_host_->DidLoseOutputSurface(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void SingleThreadProxy::DidSwapFrame() { |
| if (next_frame_is_newly_committed_frame_) { |
| next_frame_is_newly_committed_frame_ = false; |
| layer_tree_host_->DidCommitAndDrawFrame(); |
| } |
| } |
| |
| bool SingleThreadProxy::CommitPendingForTesting() { return false; } |
| |
| } // namespace cc |