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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.
61 lines
2.1 KiB
C++
61 lines
2.1 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_RENDER_TARGET_CACHE_H_
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#define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_RENDER_TARGET_CACHE_H_
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#include <set>
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#include <stack>
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#include <tuple>
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#include <unordered_map>
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#include "flutter/fml/macros.h"
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#include "flutter/shell/platform/embedder/embedder_external_view.h"
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namespace flutter {
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//------------------------------------------------------------------------------
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/// @brief A cache used to reference render targets that are owned by the
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/// embedder but needed by th engine to render a frame.
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///
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class EmbedderRenderTargetCache {
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public:
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EmbedderRenderTargetCache();
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~EmbedderRenderTargetCache();
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using RenderTargets =
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std::unordered_map<EmbedderExternalView::ViewIdentifier,
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std::unique_ptr<EmbedderRenderTarget>,
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EmbedderExternalView::ViewIdentifier::Hash,
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EmbedderExternalView::ViewIdentifier::Equal>;
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std::pair<RenderTargets, EmbedderExternalView::ViewIdentifierSet>
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GetExistingTargetsInCache(
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const EmbedderExternalView::PendingViews& pending_views);
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std::set<std::unique_ptr<EmbedderRenderTarget>>
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ClearAllRenderTargetsInCache();
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void CacheRenderTarget(EmbedderExternalView::ViewIdentifier view_identifier,
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std::unique_ptr<EmbedderRenderTarget> target);
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size_t GetCachedTargetsCount() const;
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private:
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using CachedRenderTargets =
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std::unordered_map<EmbedderExternalView::RenderTargetDescriptor,
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std::stack<std::unique_ptr<EmbedderRenderTarget>>,
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EmbedderExternalView::RenderTargetDescriptor::Hash,
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EmbedderExternalView::RenderTargetDescriptor::Equal>;
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CachedRenderTargets cached_render_targets_;
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FML_DISALLOW_COPY_AND_ASSIGN(EmbedderRenderTargetCache);
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_RENDER_TARGET_CACHE_H_
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