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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 <SkCanvas.h>
#include <utils/Mutex.h>
#include "Caches.h"
#include "TextureCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
TextureCache::TextureCache():
mCache(LruCache<const SkPixelRef*, Texture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(MB(DEFAULT_TEXTURE_CACHE_SIZE)),
mFlushRate(DEFAULT_TEXTURE_CACHE_FLUSH_RATE) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_TEXTURE_CACHE_SIZE, property, NULL) > 0) {
INIT_LOGD(" Setting texture cache size to %sMB", property);
setMaxSize(MB(atof(property)));
} else {
INIT_LOGD(" Using default texture cache size of %.2fMB", DEFAULT_TEXTURE_CACHE_SIZE);
}
if (property_get(PROPERTY_TEXTURE_CACHE_FLUSH_RATE, property, NULL) > 0) {
float flushRate = atof(property);
INIT_LOGD(" Setting texture cache flush rate to %.2f%%", flushRate * 100.0f);
setFlushRate(flushRate);
} else {
INIT_LOGD(" Using default texture cache flush rate of %.2f%%",
DEFAULT_TEXTURE_CACHE_FLUSH_RATE * 100.0f);
}
init();
}
TextureCache::TextureCache(uint32_t maxByteSize):
mCache(LruCache<const SkPixelRef*, Texture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(maxByteSize) {
init();
}
TextureCache::~TextureCache() {
mCache.clear();
}
void TextureCache::init() {
mCache.setOnEntryRemovedListener(this);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
INIT_LOGD(" Maximum texture dimension is %d pixels", mMaxTextureSize);
mDebugEnabled = readDebugLevel() & kDebugCaches;
}
///////////////////////////////////////////////////////////////////////////////
// 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();
}
}
void TextureCache::setFlushRate(float flushRate) {
mFlushRate = fmaxf(0.0f, fminf(1.0f, flushRate));
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void TextureCache::operator()(const SkPixelRef*&, Texture*& texture) {
// This will be called already locked
if (texture) {
mSize -= texture->bitmapSize;
TEXTURE_LOGD("TextureCache::callback: name, removed size, mSize = %d, %d, %d",
texture->id, texture->bitmapSize, mSize);
if (mDebugEnabled) {
ALOGD("Texture deleted, size = %d", texture->bitmapSize);
}
texture->deleteTexture();
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
void TextureCache::resetMarkInUse() {
LruCache<const SkPixelRef*, Texture*>::Iterator iter(mCache);
while (iter.next()) {
iter.value()->isInUse = false;
}
}
bool TextureCache::canMakeTextureFromBitmap(const SkBitmap* bitmap) {
if (bitmap->width() > mMaxTextureSize || bitmap->height() > mMaxTextureSize) {
ALOGW("Bitmap too large to be uploaded into a texture (%dx%d, max=%dx%d)",
bitmap->width(), bitmap->height(), mMaxTextureSize, mMaxTextureSize);
return false;
}
return true;
}
// Returns a prepared Texture* that either is already in the cache or can fit
// in the cache (and is thus added to the cache)
Texture* TextureCache::getCachedTexture(const SkBitmap* bitmap) {
Texture* texture = mCache.get(bitmap->pixelRef());
if (!texture) {
if (!canMakeTextureFromBitmap(bitmap)) {
return NULL;
}
const uint32_t size = bitmap->rowBytes() * bitmap->height();
bool canCache = size < mMaxSize;
// Don't even try to cache a bitmap that's bigger than the cache
while (canCache && mSize + size > mMaxSize) {
Texture* oldest = mCache.peekOldestValue();
if (oldest && !oldest->isInUse) {
mCache.removeOldest();
} else {
canCache = false;
}
}
if (canCache) {
texture = new Texture();
texture->bitmapSize = size;
generateTexture(bitmap, texture, false);
mSize += size;
TEXTURE_LOGD("TextureCache::get: create texture(%p): name, size, mSize = %d, %d, %d",
bitmap, texture->id, size, mSize);
if (mDebugEnabled) {
ALOGD("Texture created, size = %d", size);
}
mCache.put(bitmap->pixelRef(), texture);
}
} else if (!texture->isInUse && bitmap->getGenerationID() != texture->generation) {
// Texture was in the cache but is dirty, re-upload
// TODO: Re-adjust the cache size if the bitmap's dimensions have changed
generateTexture(bitmap, texture, true);
}
return texture;
}
bool TextureCache::prefetchAndMarkInUse(const SkBitmap* bitmap) {
Texture* texture = getCachedTexture(bitmap);
if (texture) {
texture->isInUse = true;
}
return texture;
}
Texture* TextureCache::get(const SkBitmap* bitmap) {
Texture* texture = getCachedTexture(bitmap);
if (!texture) {
if (!canMakeTextureFromBitmap(bitmap)) {
return NULL;
}
const uint32_t size = bitmap->rowBytes() * bitmap->height();
texture = new Texture();
texture->bitmapSize = size;
generateTexture(bitmap, texture, false);
texture->cleanup = true;
}
return texture;
}
Texture* TextureCache::getTransient(const SkBitmap* bitmap) {
Texture* texture = new Texture();
texture->bitmapSize = bitmap->rowBytes() * bitmap->height();
texture->cleanup = true;
generateTexture(bitmap, texture, false);
return texture;
}
void TextureCache::remove(const SkBitmap* bitmap) {
mCache.remove(bitmap->pixelRef());
}
void TextureCache::removeDeferred(const SkBitmap* bitmap) {
Mutex::Autolock _l(mLock);
mGarbage.push(bitmap);
}
void TextureCache::clearGarbage() {
Mutex::Autolock _l(mLock);
size_t count = mGarbage.size();
for (size_t i = 0; i < count; i++) {
const SkBitmap* bitmap = mGarbage.itemAt(i);
mCache.remove(bitmap->pixelRef());
delete bitmap;
}
mGarbage.clear();
}
void TextureCache::clear() {
mCache.clear();
TEXTURE_LOGD("TextureCache:clear(), mSize = %d", mSize);
}
void TextureCache::flush() {
if (mFlushRate >= 1.0f || mCache.size() == 0) return;
if (mFlushRate <= 0.0f) {
clear();
return;
}
uint32_t targetSize = uint32_t(mSize * mFlushRate);
TEXTURE_LOGD("TextureCache::flush: target size: %d", targetSize);
while (mSize > targetSize) {
mCache.removeOldest();
}
}
void TextureCache::generateTexture(const SkBitmap* bitmap, Texture* texture, bool regenerate) {
SkAutoLockPixels alp(*bitmap);
if (!bitmap->readyToDraw()) {
ALOGE("Cannot generate texture from bitmap");
return;
}
// We could also enable mipmapping if both bitmap dimensions are powers
// of 2 but we'd have to deal with size changes. Let's keep this simple
const bool canMipMap = Extensions::getInstance().hasNPot();
// If the texture had mipmap enabled but not anymore,
// force a glTexImage2D to discard the mipmap levels
const bool resize = !regenerate || bitmap->width() != int(texture->width) ||
bitmap->height() != int(texture->height) ||
(regenerate && canMipMap && texture->mipMap && !bitmap->hasHardwareMipMap());
if (!regenerate) {
glGenTextures(1, &texture->id);
}
texture->generation = bitmap->getGenerationID();
texture->width = bitmap->width();
texture->height = bitmap->height();
Caches::getInstance().bindTexture(texture->id);
switch (bitmap->colorType()) {
case kAlpha_8_SkColorType:
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
uploadToTexture(resize, GL_ALPHA, bitmap->rowBytesAsPixels(), bitmap->bytesPerPixel(),
texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
texture->blend = true;
break;
case kRGB_565_SkColorType:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadToTexture(resize, GL_RGB, bitmap->rowBytesAsPixels(), bitmap->bytesPerPixel(),
texture->width, texture->height, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
texture->blend = false;
break;
case kN32_SkColorType:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadToTexture(resize, GL_RGBA, bitmap->rowBytesAsPixels(), bitmap->bytesPerPixel(),
texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
// Do this after calling getPixels() to make sure Skia's deferred
// decoding happened
texture->blend = !bitmap->isOpaque();
break;
case kARGB_4444_SkColorType:
case kIndex_8_SkColorType:
glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
uploadLoFiTexture(resize, bitmap, texture->width, texture->height);
texture->blend = !bitmap->isOpaque();
break;
default:
ALOGW("Unsupported bitmap colorType: %d", bitmap->colorType());
break;
}
if (canMipMap) {
texture->mipMap = bitmap->hasHardwareMipMap();
if (texture->mipMap) {
glGenerateMipmap(GL_TEXTURE_2D);
}
}
if (!regenerate) {
texture->setFilter(GL_NEAREST);
texture->setWrap(GL_CLAMP_TO_EDGE);
}
}
void TextureCache::uploadLoFiTexture(bool resize, const SkBitmap* bitmap,
uint32_t width, uint32_t height) {
SkBitmap rgbaBitmap;
rgbaBitmap.allocPixels(SkImageInfo::MakeN32(width, height, bitmap->alphaType()));
rgbaBitmap.eraseColor(0);
SkCanvas canvas(rgbaBitmap);
canvas.drawBitmap(*bitmap, 0.0f, 0.0f, NULL);
uploadToTexture(resize, GL_RGBA, rgbaBitmap.rowBytesAsPixels(), rgbaBitmap.bytesPerPixel(),
width, height, GL_UNSIGNED_BYTE, rgbaBitmap.getPixels());
}
void TextureCache::uploadToTexture(bool resize, GLenum format, GLsizei stride, GLsizei bpp,
GLsizei width, GLsizei height, GLenum type, const GLvoid * data) {
const bool useStride = stride != width && Extensions::getInstance().hasUnpackRowLength();
if ((stride == width) || useStride) {
if (useStride) {
glPixelStorei(GL_UNPACK_ROW_LENGTH, stride);
}
if (resize) {
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, type, data);
} else {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, data);
}
if (useStride) {
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
} else {
// With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
// if the stride doesn't match the width
GLvoid * temp = (GLvoid *) malloc(width * height * bpp);
if (!temp) return;
uint8_t * pDst = (uint8_t *)temp;
uint8_t * pSrc = (uint8_t *)data;
for (GLsizei i = 0; i < height; i++) {
memcpy(pDst, pSrc, width * bpp);
pDst += width * bpp;
pSrc += stride * bpp;
}
if (resize) {
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, type, temp);
} else {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
}
free(temp);
}
}
}; // namespace uirenderer
}; // namespace android
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