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92abb22c64
This reverts commit ef9e7b1a1365c07ab0df2e2016c4442c3963c2c7 with the following changes to accommodate an embedder for whom the original optimizations caused issues: * Ensure stable order in the backing stores presented to the embedder. This is a pessimization that will be reverted when the embedder migrates. Tracked in https://github.com/flutter/flutter/issues/51228 * Forego the optimization where the unused layers would be collected before allocation of new layers needs to happen. This is a pessimization that will be reverted when the embedder migrates. Tracked in https://github.com/flutter/flutter/issues/51229 More context in b/146142979.
127 lines
4.0 KiB
C++
127 lines
4.0 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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#ifndef FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_VIEW_H_
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#define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_VIEW_H_
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#include <optional>
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#include <unordered_map>
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#include <unordered_set>
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#include "flutter/flow/embedded_views.h"
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#include "flutter/fml/hash_combine.h"
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#include "flutter/fml/macros.h"
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#include "flutter/shell/common/canvas_spy.h"
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#include "flutter/shell/platform/embedder/embedder_render_target.h"
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#include "third_party/skia/include/core/SkPictureRecorder.h"
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namespace flutter {
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class EmbedderExternalView {
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public:
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using PlatformViewID = int64_t;
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struct ViewIdentifier {
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std::optional<PlatformViewID> platform_view_id;
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ViewIdentifier() {}
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ViewIdentifier(PlatformViewID view_id) : platform_view_id(view_id) {}
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struct Hash {
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constexpr std::size_t operator()(const ViewIdentifier& desc) const {
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if (!desc.platform_view_id.has_value()) {
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return fml::HashCombine();
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}
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return fml::HashCombine(desc.platform_view_id.value());
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}
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};
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struct Equal {
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constexpr bool operator()(const ViewIdentifier& lhs,
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const ViewIdentifier& rhs) const {
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return lhs.platform_view_id == rhs.platform_view_id;
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}
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};
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};
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struct RenderTargetDescriptor {
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ViewIdentifier view_identifier;
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SkISize surface_size;
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RenderTargetDescriptor(ViewIdentifier p_view_identifier,
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SkISize p_surface_size)
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: view_identifier(p_view_identifier), surface_size(p_surface_size) {}
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struct Hash {
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constexpr std::size_t operator()(
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const RenderTargetDescriptor& desc) const {
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return fml::HashCombine(desc.surface_size.width(),
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desc.surface_size.height(),
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ViewIdentifier::Hash{}(desc.view_identifier));
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}
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};
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struct Equal {
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bool operator()(const RenderTargetDescriptor& lhs,
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const RenderTargetDescriptor& rhs) const {
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return lhs.surface_size == rhs.surface_size &&
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ViewIdentifier::Equal{}(lhs.view_identifier,
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rhs.view_identifier);
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}
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};
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};
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using ViewIdentifierSet = std::unordered_set<ViewIdentifier,
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ViewIdentifier::Hash,
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ViewIdentifier::Equal>;
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using PendingViews = std::unordered_map<ViewIdentifier,
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std::unique_ptr<EmbedderExternalView>,
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ViewIdentifier::Hash,
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ViewIdentifier::Equal>;
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EmbedderExternalView(const SkISize& frame_size,
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const SkMatrix& surface_transformation);
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EmbedderExternalView(const SkISize& frame_size,
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const SkMatrix& surface_transformation,
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ViewIdentifier view_identifier,
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std::unique_ptr<EmbeddedViewParams> params);
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~EmbedderExternalView();
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bool IsRootView() const;
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bool HasPlatformView() const;
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bool HasEngineRenderedContents() const;
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ViewIdentifier GetViewIdentifier() const;
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const EmbeddedViewParams* GetEmbeddedViewParams() const;
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RenderTargetDescriptor CreateRenderTargetDescriptor() const;
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SkCanvas* GetCanvas() const;
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SkISize GetRenderSurfaceSize() const;
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bool Render(const EmbedderRenderTarget& render_target);
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private:
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const SkISize render_surface_size_;
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const SkMatrix surface_transformation_;
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ViewIdentifier view_identifier_;
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std::unique_ptr<EmbeddedViewParams> embedded_view_params_;
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std::unique_ptr<SkPictureRecorder> recorder_;
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std::unique_ptr<CanvasSpy> canvas_spy_;
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FML_DISALLOW_COPY_AND_ASSIGN(EmbedderExternalView);
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_VIEW_H_
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