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129 lines
3.7 KiB
C++
129 lines
3.7 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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#ifndef SHELL_COMMON_RASTERIZER_H_
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#define SHELL_COMMON_RASTERIZER_H_
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#include <memory>
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#include "flutter/common/settings.h"
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#include "flutter/common/task_runners.h"
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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 "flutter/fml/closure.h"
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#include "flutter/fml/memory/weak_ptr.h"
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#include "flutter/fml/synchronization/waitable_event.h"
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#include "flutter/lib/ui/snapshot_delegate.h"
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#include "flutter/shell/common/pipeline.h"
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#include "flutter/shell/common/surface.h"
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namespace flutter {
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/// Takes |LayerTree|s and draws its contents.
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class Rasterizer final : public SnapshotDelegate {
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public:
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class Delegate {
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public:
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virtual void OnFrameRasterized(const FrameTiming&) = 0;
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};
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// TODO(dnfield): remove once embedders have caught up.
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class DummyDelegate : public Delegate {
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void OnFrameRasterized(const FrameTiming&) override {}
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};
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Rasterizer(TaskRunners task_runners,
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std::unique_ptr<flutter::CompositorContext> compositor_context);
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Rasterizer(Delegate& delegate, TaskRunners task_runners);
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Rasterizer(Delegate& delegate,
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TaskRunners task_runners,
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std::unique_ptr<flutter::CompositorContext> compositor_context);
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~Rasterizer();
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void Setup(std::unique_ptr<Surface> surface);
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void Teardown();
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// Frees up Skia GPU resources.
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//
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// This method must be called from the GPU task runner.
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void NotifyLowMemoryWarning() const;
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fml::WeakPtr<Rasterizer> GetWeakPtr() const;
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fml::WeakPtr<SnapshotDelegate> GetSnapshotDelegate() const;
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flutter::LayerTree* GetLastLayerTree();
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void DrawLastLayerTree();
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flutter::TextureRegistry* GetTextureRegistry();
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void Draw(fml::RefPtr<Pipeline<flutter::LayerTree>> pipeline);
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enum class ScreenshotType {
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SkiaPicture,
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UncompressedImage, // In kN32_SkColorType format
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CompressedImage,
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};
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struct Screenshot {
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sk_sp<SkData> data;
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SkISize frame_size = SkISize::MakeEmpty();
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Screenshot();
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Screenshot(sk_sp<SkData> p_data, SkISize p_size);
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Screenshot(const Screenshot& other);
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~Screenshot();
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};
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Screenshot ScreenshotLastLayerTree(ScreenshotType type, bool base64_encode);
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// Sets a callback that will be executed after the next frame is submitted to
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// the surface on the GPU task runner.
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void SetNextFrameCallback(fml::closure callback);
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flutter::CompositorContext* compositor_context() {
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return compositor_context_.get();
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}
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// Sets the max size in bytes of the Skia resource cache. If this call is
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// originating from the user, e.g. over the flutter/skia system channel,
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// set from_user to true and the value will take precedence over system
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// generated values, e.g. from a display resolution change.
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void SetResourceCacheMaxBytes(size_t max_bytes, bool from_user);
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size_t GetResourceCacheMaxBytes() const;
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private:
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Delegate& delegate_;
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TaskRunners task_runners_;
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std::unique_ptr<Surface> surface_;
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std::unique_ptr<flutter::CompositorContext> compositor_context_;
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std::unique_ptr<flutter::LayerTree> last_layer_tree_;
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fml::closure next_frame_callback_;
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bool user_override_resource_cache_bytes_;
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fml::WeakPtrFactory<Rasterizer> weak_factory_;
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// |SnapshotDelegate|
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sk_sp<SkImage> MakeRasterSnapshot(sk_sp<SkPicture> picture,
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SkISize picture_size) override;
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void DoDraw(std::unique_ptr<flutter::LayerTree> layer_tree);
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bool DrawToSurface(flutter::LayerTree& layer_tree);
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void FireNextFrameCallbackIfPresent();
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FML_DISALLOW_COPY_AND_ASSIGN(Rasterizer);
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};
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} // namespace flutter
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#endif // SHELL_COMMON_RASTERIZER_H_
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