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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 <utils/JenkinsHash.h>
#include <utils/Log.h>
#include "Caches.h"
#include "PatchCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
PatchCache::PatchCache():
mSize(0), mCache(LruCache<PatchDescription, Patch*>::kUnlimitedCapacity),
mMeshBuffer(0), mGenerationId(0) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_PATCH_CACHE_SIZE, property, NULL) > 0) {
INIT_LOGD(" Setting patch cache size to %skB", property);
mMaxSize = KB(atoi(property));
} else {
INIT_LOGD(" Using default patch cache size of %.2fkB", DEFAULT_PATCH_CACHE_SIZE);
mMaxSize = KB(DEFAULT_PATCH_CACHE_SIZE);
}
}
PatchCache::~PatchCache() {
clear();
}
void PatchCache::init(Caches& caches) {
bool created = false;
if (!mMeshBuffer) {
glGenBuffers(1, &mMeshBuffer);
created = true;
}
caches.bindMeshBuffer(mMeshBuffer);
caches.resetVertexPointers();
if (created) {
createVertexBuffer();
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
hash_t PatchCache::PatchDescription::hash() const {
uint32_t hash = JenkinsHashMix(0, android::hash_type(mPatch));
hash = JenkinsHashMix(hash, mBitmapWidth);
hash = JenkinsHashMix(hash, mBitmapHeight);
hash = JenkinsHashMix(hash, mPixelWidth);
hash = JenkinsHashMix(hash, mPixelHeight);
return JenkinsHashWhiten(hash);
}
int PatchCache::PatchDescription::compare(const PatchCache::PatchDescription& lhs,
const PatchCache::PatchDescription& rhs) {
return memcmp(&lhs, &rhs, sizeof(PatchDescription));
}
void PatchCache::clear() {
clearCache();
if (mMeshBuffer) {
Caches::getInstance().unbindMeshBuffer();
glDeleteBuffers(1, &mMeshBuffer);
mMeshBuffer = 0;
mSize = 0;
}
}
void PatchCache::clearCache() {
LruCache<PatchDescription, Patch*>::Iterator i(mCache);
while (i.next()) {
delete i.value();
}
mCache.clear();
}
void PatchCache::createVertexBuffer() {
glBufferData(GL_ARRAY_BUFFER, mMaxSize, NULL, GL_DYNAMIC_DRAW);
mSize = 0;
mGenerationId++;
}
const Patch* PatchCache::get(const AssetAtlas::Entry* entry,
const uint32_t bitmapWidth, const uint32_t bitmapHeight,
const float pixelWidth, const float pixelHeight, const Res_png_9patch* patch) {
const PatchDescription description(bitmapWidth, bitmapHeight, pixelWidth, pixelHeight, patch);
const Patch* mesh = mCache.get(description);
if (!mesh) {
Patch* newMesh = new Patch();
TextureVertex* vertices;
if (entry) {
vertices = newMesh->createMesh(bitmapWidth, bitmapHeight,
0.0f, 0.0f, pixelWidth, pixelHeight, entry->uvMapper, patch);
} else {
vertices = newMesh->createMesh(bitmapWidth, bitmapHeight,
0.0f, 0.0f, pixelWidth, pixelHeight, patch);
}
if (vertices) {
// This call ensures the VBO exists and that it is bound
init(Caches::getInstance());
// TODO: Simply remove the oldest items until we have enough room
// This will require to keep a list of free blocks in the VBO
uint32_t size = newMesh->getSize();
if (mSize + size > mMaxSize) {
clearCache();
createVertexBuffer();
}
newMesh->offset = (GLintptr) mSize;
newMesh->textureOffset = newMesh->offset + gMeshTextureOffset;
mSize += size;
glBufferSubData(GL_ARRAY_BUFFER, newMesh->offset, size, vertices);
delete[] vertices;
}
mCache.put(description, newMesh);
return newMesh;
}
return mesh;
}
}; // namespace uirenderer
}; // namespace android
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