5b3b35296e
This optimization is currently disabled until Launcher is modified to take advantage of it. The optimization can be enabled by turning on RENDER_LAYERS_AS_REGIONS in the OpenGLRenderer.h file. Change-Id: I2fdf59d0f4dc690a3d7f712173ab8db3848b27b1
142 lines
4.0 KiB
C++
142 lines
4.0 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_HWUI_LAYER_CACHE_H
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#define ANDROID_HWUI_LAYER_CACHE_H
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#include "Layer.h"
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#include "utils/SortedList.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Defines
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///////////////////////////////////////////////////////////////////////////////
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// Debug
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#define DEBUG_LAYERS 0
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// Indicates whether to remove the biggest layers first, or the smaller ones
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#define LAYER_REMOVE_BIGGEST 0
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// Textures used by layers must have dimensions multiples of this number
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#define LAYER_SIZE 64
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// Debug
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#if DEBUG_LAYERS
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#define LAYER_LOGD(...) LOGD(__VA_ARGS__)
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#else
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#define LAYER_LOGD(...)
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// Cache
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///////////////////////////////////////////////////////////////////////////////
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class LayerCache {
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public:
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LayerCache();
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~LayerCache();
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/**
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* Returns a layer large enough for the specified dimensions. If no suitable
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* layer can be found, a new one is created and returned. If creating a new
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* layer fails, NULL is returned.
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*
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* When a layer is obtained from the cache, it is removed and the total
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* size of the cache goes down.
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*
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* @param width The desired width of the layer
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* @param width The desired height of the layer
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*/
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Layer* get(const uint32_t width, const uint32_t height);
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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. Adding a layer can cause other layers to
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* be removed from the cache.
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*
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* @param layer The layer to add to the cache
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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(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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struct LayerEntry {
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LayerEntry():
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mLayer(NULL), mWidth(0), mHeight(0) {
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}
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LayerEntry(const uint32_t layerWidth, const uint32_t layerHeight): mLayer(NULL) {
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mWidth = uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
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mHeight = uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
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}
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LayerEntry(const LayerEntry& entry):
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mLayer(entry.mLayer), mWidth(entry.mWidth), mHeight(entry.mHeight) {
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}
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LayerEntry(Layer* layer):
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mLayer(layer), mWidth(layer->width), mHeight(layer->height) {
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}
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bool operator<(const LayerEntry& rhs) const {
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if (mWidth == rhs.mWidth) {
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return mHeight < rhs.mHeight;
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}
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return mWidth < rhs.mWidth;
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}
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bool operator==(const LayerEntry& rhs) const {
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return mWidth == rhs.mWidth && mHeight == rhs.mHeight;
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}
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Layer* mLayer;
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uint32_t mWidth;
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uint32_t mHeight;
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}; // struct LayerEntry
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SortedList<LayerEntry> 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_HWUI_LAYER_CACHE_H
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