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971a639151
After pre-roll we know if there have been any mutations made to the IOS embedded UIViews. If there are any mutations and the thread configuration is such chat the mutations will be committed on an illegal thread (GPU thread), we merge the threads and keep them merged until the lease expires. The lease is currently set to expire after 10 frames of no mutations. If there are any mutations in the interim we extend the lease. TaskRunnerMerger will ultimately be responsible for enforcing the correct thread configurations. This configuration will be inactive even after this change since still use the same thread when we create the iOS engine. That is slated to change in the coming PRs.
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/flow/compositor_context.h"
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#include "flutter/flow/layers/layer_tree.h"
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#include "third_party/skia/include/core/SkCanvas.h"
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namespace flutter {
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CompositorContext::CompositorContext() = default;
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CompositorContext::~CompositorContext() = default;
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void CompositorContext::BeginFrame(ScopedFrame& frame,
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bool enable_instrumentation) {
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if (enable_instrumentation) {
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frame_count_.Increment();
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raster_time_.Start();
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}
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}
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void CompositorContext::EndFrame(ScopedFrame& frame,
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bool enable_instrumentation) {
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raster_cache_.SweepAfterFrame();
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if (enable_instrumentation) {
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raster_time_.Stop();
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}
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}
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std::unique_ptr<CompositorContext::ScopedFrame> CompositorContext::AcquireFrame(
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GrContext* gr_context,
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SkCanvas* canvas,
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ExternalViewEmbedder* view_embedder,
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const SkMatrix& root_surface_transformation,
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bool instrumentation_enabled,
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fml::RefPtr<fml::GpuThreadMerger> gpu_thread_merger) {
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return std::make_unique<ScopedFrame>(
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*this, gr_context, canvas, view_embedder, root_surface_transformation,
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instrumentation_enabled, gpu_thread_merger);
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}
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CompositorContext::ScopedFrame::ScopedFrame(
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CompositorContext& context,
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GrContext* gr_context,
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SkCanvas* canvas,
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ExternalViewEmbedder* view_embedder,
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const SkMatrix& root_surface_transformation,
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bool instrumentation_enabled,
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fml::RefPtr<fml::GpuThreadMerger> gpu_thread_merger)
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: context_(context),
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gr_context_(gr_context),
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canvas_(canvas),
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view_embedder_(view_embedder),
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root_surface_transformation_(root_surface_transformation),
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instrumentation_enabled_(instrumentation_enabled),
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gpu_thread_merger_(gpu_thread_merger) {
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context_.BeginFrame(*this, instrumentation_enabled_);
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}
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CompositorContext::ScopedFrame::~ScopedFrame() {
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context_.EndFrame(*this, instrumentation_enabled_);
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}
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RasterStatus CompositorContext::ScopedFrame::Raster(
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flutter::LayerTree& layer_tree,
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bool ignore_raster_cache) {
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layer_tree.Preroll(*this, ignore_raster_cache);
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PostPrerollResult post_preroll_result = PostPrerollResult::kSuccess;
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if (view_embedder_ && gpu_thread_merger_) {
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post_preroll_result = view_embedder_->PostPrerollAction(gpu_thread_merger_);
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}
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if (post_preroll_result == PostPrerollResult::kResubmitFrame) {
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return RasterStatus::kResubmit;
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}
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// Clearing canvas after preroll reduces one render target switch when preroll
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// paints some raster cache.
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if (canvas()) {
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canvas()->clear(SK_ColorTRANSPARENT);
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}
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layer_tree.Paint(*this, ignore_raster_cache);
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return RasterStatus::kSuccess;
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}
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void CompositorContext::OnGrContextCreated() {
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texture_registry_.OnGrContextCreated();
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raster_cache_.Clear();
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}
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void CompositorContext::OnGrContextDestroyed() {
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texture_registry_.OnGrContextDestroyed();
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raster_cache_.Clear();
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}
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} // namespace flutter
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