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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "OpenGLRenderer"
#include <GLES2/gl2.h>
#include <utils/Log.h>
#include "Caches.h"
#include "LayerCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
LayerCache::LayerCache(): mSize(0), mMaxSize(MB(DEFAULT_LAYER_CACHE_SIZE)) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_LAYER_CACHE_SIZE, property, NULL) > 0) {
INIT_LOGD(" Setting layer cache size to %sMB", property);
setMaxSize(MB(atof(property)));
} else {
INIT_LOGD(" Using default layer cache size of %.2fMB", DEFAULT_LAYER_CACHE_SIZE);
}
}
LayerCache::~LayerCache() {
clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t LayerCache::getSize() {
return mSize;
}
uint32_t LayerCache::getMaxSize() {
return mMaxSize;
}
void LayerCache::setMaxSize(uint32_t maxSize) {
clear();
mMaxSize = maxSize;
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
int LayerCache::LayerEntry::compare(const LayerCache::LayerEntry& lhs,
const LayerCache::LayerEntry& rhs) {
int deltaInt = int(lhs.mWidth) - int(rhs.mWidth);
if (deltaInt != 0) return deltaInt;
return int(lhs.mHeight) - int(rhs.mHeight);
}
void LayerCache::deleteLayer(Layer* layer) {
if (layer) {
LAYER_LOGD("Destroying layer %dx%d, fbo %d", layer->getWidth(), layer->getHeight(),
layer->getFbo());
mSize -= layer->getWidth() * layer->getHeight() * 4;
Caches::getInstance().resourceCache.decrementRefcount(layer);
}
}
void LayerCache::clear() {
size_t count = mCache.size();
for (size_t i = 0; i < count; i++) {
deleteLayer(mCache.itemAt(i).mLayer);
}
mCache.clear();
}
Layer* LayerCache::get(const uint32_t width, const uint32_t height) {
Layer* layer = NULL;
LayerEntry entry(width, height);
ssize_t index = mCache.indexOf(entry);
if (index >= 0) {
entry = mCache.itemAt(index);
mCache.removeAt(index);
layer = entry.mLayer;
mSize -= layer->getWidth() * layer->getHeight() * 4;
LAYER_LOGD("Reusing layer %dx%d", layer->getWidth(), layer->getHeight());
} else {
LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight);
layer = new Layer(entry.mWidth, entry.mHeight);
layer->setBlend(true);
layer->setEmpty(true);
layer->setFbo(0);
layer->generateTexture();
layer->bindTexture();
layer->setFilter(GL_NEAREST);
layer->setWrap(GL_CLAMP_TO_EDGE, false);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
#if DEBUG_LAYERS
dump();
#endif
}
return layer;
}
void LayerCache::dump() {
size_t size = mCache.size();
for (size_t i = 0; i < size; i++) {
const LayerEntry& entry = mCache.itemAt(i);
LAYER_LOGD(" Layer size %dx%d", entry.mWidth, entry.mHeight);
}
}
bool LayerCache::put(Layer* layer) {
if (!layer->isCacheable()) return false;
const uint32_t size = layer->getWidth() * layer->getHeight() * 4;
// Don't even try to cache a layer that's bigger than the cache
if (size < mMaxSize) {
// TODO: Use an LRU
while (mSize + size > mMaxSize) {
size_t position = 0;
#if LAYER_REMOVE_BIGGEST_FIRST
position = mCache.size() - 1;
#endif
Layer* victim = mCache.itemAt(position).mLayer;
deleteLayer(victim);
mCache.removeAt(position);
LAYER_LOGD(" Deleting layer %.2fx%.2f", victim->layer.getWidth(),
victim->layer.getHeight());
}
layer->cancelDefer();
LayerEntry entry(layer);
mCache.add(entry);
mSize += size;
return true;
}
return false;
}
}; // namespace uirenderer
}; // namespace android
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