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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 "TextureCache.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
TextureCache::TextureCache(uint32_t maxByteSize):
mCache(GenerationCache<SkBitmap*, Texture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(maxByteSize) {
mCache.setOnEntryRemovedListener(this);
}
TextureCache::~TextureCache() {
mCache.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t TextureCache::getSize() {
return mSize;
}
uint32_t TextureCache::getMaxSize() {
return mMaxSize;
}
void TextureCache::setMaxSize(uint32_t maxSize) {
mMaxSize = maxSize;
while (mSize > mMaxSize) {
mCache.removeOldest();
}
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void TextureCache::operator()(SkBitmap*& bitmap, Texture*& texture) {
if (bitmap) {
const uint32_t size = bitmap->rowBytes() * bitmap->height();
mSize -= size;
}
if (texture) {
glDeleteTextures(1, &texture->id);
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
Texture* TextureCache::get(SkBitmap* bitmap) {
Texture* texture = mCache.get(bitmap);
if (!texture) {
const uint32_t size = bitmap->rowBytes() * bitmap->height();
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
}
texture = new Texture;
generateTexture(bitmap, texture, false);
if (size < mMaxSize) {
mSize += size;
mCache.put(bitmap, texture);
}
} else if (bitmap->getGenerationID() != texture->generation) {
generateTexture(bitmap, texture, true);
}
return texture;
}
void TextureCache::remove(SkBitmap* bitmap) {
mCache.remove(bitmap);
}
void TextureCache::clear() {
mCache.clear();
}
void TextureCache::generateTexture(SkBitmap* bitmap, Texture* texture, bool regenerate) {
SkAutoLockPixels alp(*bitmap);
if (!bitmap->readyToDraw()) {
LOGE("Cannot generate texture from bitmap");
return;
}
if (!regenerate) {
texture->generation = bitmap->getGenerationID();
texture->width = bitmap->width();
texture->height = bitmap->height();
glGenTextures(1, &texture->id);
}
glBindTexture(GL_TEXTURE_2D, texture->id);
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
switch (bitmap->getConfig()) {
case SkBitmap::kRGB_565_Config:
texture->blend = false;
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, bitmap->rowBytesAsPixels(), texture->height, 0,
GL_RGB, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
break;
case SkBitmap::kARGB_8888_Config:
texture->blend = true;
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels());
break;
default:
break;
}
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);
glBindTexture(GL_TEXTURE_2D, 0);
}
}; // namespace uirenderer
}; // namespace android
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