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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 "Debug.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
///////////////////////////////////////////////////////////////////////////////
void LayerCache::deleteLayer(Layer* layer) {
if (layer) {
mSize -= layer->width * layer->height * 4;
glDeleteTextures(1, &layer->texture);
delete 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->width * layer->height * 4;
LAYER_LOGD("Reusing layer %dx%d", layer->width, layer->height);
} else {
LAYER_LOGD("Creating new layer %dx%d", entry.mWidth, entry.mHeight);
layer = new Layer(entry.mWidth, entry.mHeight);
layer->blend = true;
layer->empty = true;
layer->fbo = 0;
layer->colorFilter = NULL;
glGenTextures(1, &layer->texture);
glBindTexture(GL_TEXTURE_2D, layer->texture);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#if DEBUG_LAYERS
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);
}
#endif
}
return layer;
}
bool LayerCache::resize(Layer* layer, const uint32_t width, const uint32_t height) {
// TODO: We should be smarter and see if we have a texture of the appropriate
// size already in the cache, and reuse it instead of creating a new one
LayerEntry entry(width, height);
if (entry.mWidth <= layer->width && entry.mHeight <= layer->height) {
return true;
}
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, layer->texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, entry.mWidth, entry.mHeight, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
if (glGetError() != GL_NO_ERROR) {
return false;
}
layer->width = entry.mWidth;
layer->height = entry.mHeight;
return true;
}
bool LayerCache::put(Layer* layer) {
const uint32_t size = layer->width * layer->height * 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
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());
}
LayerEntry entry(layer);
mCache.add(entry);
mSize += size;
return true;
}
return false;
}
}; // namespace uirenderer
}; // namespace android
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