115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
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/*
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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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#define LOG_TAG "OpenGLRenderer"
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#include <GLES2/gl2.h>
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#include "LayerCache.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Constructors/destructor
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///////////////////////////////////////////////////////////////////////////////
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LayerCache::LayerCache(uint32_t maxByteSize):
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mCache(GenerationCache<LayerSize, Layer*>::kUnlimitedCapacity),
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mSize(0), mMaxSize(maxByteSize) {
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}
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LayerCache::~LayerCache() {
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mCache.setOnEntryRemovedListener(this);
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mCache.clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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// Size management
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///////////////////////////////////////////////////////////////////////////////
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uint32_t LayerCache::getSize() {
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return mSize;
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}
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uint32_t LayerCache::getMaxSize() {
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return mMaxSize;
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}
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void LayerCache::setMaxSize(uint32_t maxSize) {
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mMaxSize = maxSize;
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while (mSize > mMaxSize) {
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Layer* oldest = mCache.removeOldest();
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deleteLayer(oldest);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Callbacks
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///////////////////////////////////////////////////////////////////////////////
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void LayerCache::operator()(LayerSize& size, Layer*& layer) {
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deleteLayer(layer);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Caching
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///////////////////////////////////////////////////////////////////////////////
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void LayerCache::deleteLayer(Layer* layer) {
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if (layer) {
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mSize -= layer->layer.getWidth() * layer->layer.getHeight() * 4;
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glDeleteFramebuffers(1, &layer->fbo);
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glDeleteTextures(1, &layer->texture);
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delete layer;
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}
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}
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void LayerCache::clear() {
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mCache.setOnEntryRemovedListener(this);
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mCache.clear();
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mCache.setOnEntryRemovedListener(NULL);
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}
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Layer* LayerCache::get(LayerSize& size) {
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Layer* layer = mCache.remove(size);
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if (layer) {
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mSize -= layer->layer.getWidth() * layer->layer.getHeight() * 4;
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}
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return layer;
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}
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bool LayerCache::put(LayerSize& layerSize, Layer* layer) {
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const uint32_t size = layerSize.width * layerSize.height * 4;
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// Don't even try to cache a layer that's bigger than the cache
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if (size < mMaxSize) {
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while (mSize + size > mMaxSize) {
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Layer* oldest = mCache.removeOldest();
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deleteLayer(oldest);
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}
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mCache.put(layerSize, layer);
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mSize += size;
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return true;
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}
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return false;
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}
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}; // namespace uirenderer
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}; // namespace android
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