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We push a bit up the tree during preroll to learn whether there system composited layers below each layer. During update scene, we squash down to paint tasks, which we execute after publishing the new scene.
83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
// Copyright 2015 The Chromium 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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#ifndef FLUTTER_FLOW_COMPOSITOR_CONTEXT_H_
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#define FLUTTER_FLOW_COMPOSITOR_CONTEXT_H_
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#include <memory>
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#include <string>
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#include "flutter/flow/instrumentation.h"
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#include "flutter/flow/raster_cache.h"
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#include "lib/ftl/macros.h"
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#include "third_party/skia/include/core/SkCanvas.h"
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#include "third_party/skia/include/core/SkPictureRecorder.h"
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namespace flow {
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class CompositorContext {
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public:
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class ScopedFrame {
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public:
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SkCanvas& canvas() { return *canvas_; }
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CompositorContext& context() const { return context_; }
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GrContext* gr_context() const { return gr_context_; }
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ScopedFrame(ScopedFrame&& frame);
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~ScopedFrame();
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private:
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CompositorContext& context_;
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GrContext* gr_context_;
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SkCanvas* canvas_;
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const bool instrumentation_enabled_;
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ScopedFrame(CompositorContext& context,
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GrContext* gr_context,
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SkCanvas* canvas,
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bool instrumentation_enabled);
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friend class CompositorContext;
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FTL_DISALLOW_COPY_AND_ASSIGN(ScopedFrame);
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};
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CompositorContext();
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~CompositorContext();
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ScopedFrame AcquireFrame(GrContext* gr_context,
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SkCanvas* canvas,
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bool instrumentation_enabled = true);
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void OnGrContextDestroyed();
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RasterCache& raster_cache() { return raster_cache_; }
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const Counter& frame_count() const { return frame_count_; }
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const Stopwatch& frame_time() const { return frame_time_; }
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Stopwatch& engine_time() { return engine_time_; };
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private:
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RasterCache raster_cache_;
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Counter frame_count_;
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Stopwatch frame_time_;
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Stopwatch engine_time_;
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void BeginFrame(ScopedFrame& frame, bool enable_instrumentation);
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void EndFrame(ScopedFrame& frame, bool enable_instrumentation);
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FTL_DISALLOW_COPY_AND_ASSIGN(CompositorContext);
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};
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} // namespace flow
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#endif // FLUTTER_FLOW_COMPOSITOR_CONTEXT_H_
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