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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// Copyright 2014 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 SKY_ENGINE_CORE_RENDERING_CLIPRECTSCACHE_H_
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#define SKY_ENGINE_CORE_RENDERING_CLIPRECTSCACHE_H_
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#include "flutter/sky/engine/core/rendering/ClipRects.h"
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namespace blink {
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enum ClipRectsCacheSlot {
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// Relative to the ancestor treated as the root (e.g. transformed layer). Used
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// for hit testing.
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RootRelativeClipRects,
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// Relative to painting ancestor. Used for painting.
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PaintingClipRects,
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NumberOfClipRectsCacheSlots,
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UncachedClipRects,
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};
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class ClipRectsCache {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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struct Entry {
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Entry() : root(0) {}
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const RenderLayer* root;
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RefPtr<ClipRects> clipRects;
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};
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Entry& get(ClipRectsCacheSlot slot) {
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ASSERT(slot < NumberOfClipRectsCacheSlots);
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return m_entries[slot];
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}
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void clear(ClipRectsCacheSlot slot) {
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ASSERT(slot < NumberOfClipRectsCacheSlots);
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m_entries[slot] = Entry();
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}
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private:
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Entry m_entries[NumberOfClipRectsCacheSlots];
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_RENDERING_CLIPRECTSCACHE_H_
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