dda570201a
The cache is used to draw layers so that a new texture does not have to be recreated every time a call to saveLayer() happens. The FBO cache used a KeyedVector, which is a bad idea. The cache should be able to store several FBOs of the same size (this happens a lot during scrolling with fading edges for instance.) This will be changed in a future CL. Change-Id: Ic316189e625f0dbcf0d273a71cc981a433d48726
79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_UI_LAYER_CACHE_H
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#define ANDROID_UI_LAYER_CACHE_H
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#include "Layer.h"
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#include "GenerationCache.h"
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namespace android {
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namespace uirenderer {
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class LayerCache: public OnEntryRemoved<LayerSize, Layer*> {
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public:
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LayerCache(uint32_t maxByteSize);
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~LayerCache();
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/**
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* Used as a callback when an entry is removed from the cache.
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* Do not invoke directly.
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*/
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void operator()(LayerSize& bitmap, Layer*& texture);
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/**
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* Returns the layer of specified dimensions, NULL if cannot be found.
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*/
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Layer* get(LayerSize& size);
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/**
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* Adds the layer to the cache. The layer will not be added if there is
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* not enough space available.
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*
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* @return True if the layer was added, false otherwise.
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*/
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bool put(LayerSize& size, Layer* layer);
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/**
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* Clears the cache. This causes all layers to be deleted.
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*/
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void clear();
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/**
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* Sets the maximum size of the cache in bytes.
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*/
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void setMaxSize(uint32_t maxSize);
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/**
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* Returns the maximum size of the cache in bytes.
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*/
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uint32_t getMaxSize();
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/**
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* Returns the current size of the cache in bytes.
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*/
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uint32_t getSize();
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private:
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void deleteLayer(Layer* layer);
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GenerationCache<LayerSize, Layer*> mCache;
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uint32_t mSize;
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uint32_t mMaxSize;
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}; // class LayerCache
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_UI_LAYER_CACHE_H
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