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9eb5df4146
The code that draws the picture knows more about the picture (and the future) than we do. This patch gives them a way to hint us about what's going to happen with the picture in the future.
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
// Copyright 2016 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 FLOW_RASTER_CACHE_H_
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#define FLOW_RASTER_CACHE_H_
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#include <memory>
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#include <unordered_map>
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#include "base/macros.h"
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#include "skia/ext/refptr.h"
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#include "third_party/skia/include/core/SkSize.h"
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#include "third_party/skia/include/core/SkImage.h"
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#include "flow/instrumentation.h"
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namespace flow {
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class RasterCache {
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public:
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RasterCache();
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~RasterCache();
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sk_sp<SkImage> GetPrerolledImage(GrContext* context,
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SkPicture* picture,
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const SkMatrix& ctm,
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bool is_complex,
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bool will_change);
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void SweepAfterFrame();
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void Clear();
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private:
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struct Entry {
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Entry();
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~Entry();
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bool used_this_frame = false;
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int access_count = 0;
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SkISize physical_size;
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sk_sp<SkImage> image;
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};
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using Cache = std::unordered_map<uint32_t, Entry>;
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Cache cache_;
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DISALLOW_COPY_AND_ASSIGN(RasterCache);
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};
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} // namespace flow
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#endif // FLOW_RASTER_CACHE_H_
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