libs/hwui/TextureCache.cpp - platform/frameworks/base - Gitiles

 /*
  * 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 SkBitmap*, 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 SkBitmap*, 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 SkBitmap*&, 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 SkBitmap*, 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);

     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, 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);
 }

 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);
         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->config()) {
     case SkBitmap::kA8_Config:
         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
         uploadToTexture(resize, GL_ALPHA, bitmap->rowBytesAsPixels(),
                 texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
         texture->blend = true;
         break;
     case SkBitmap::kRGB_565_Config:
         glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
         uploadToTexture(resize, GL_RGB, bitmap->rowBytesAsPixels(),
                 texture->width, texture->height, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
         texture->blend = false;
         break;
     case SkBitmap::kARGB_8888_Config:
         glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
         uploadToTexture(resize, GL_RGBA, bitmap->rowBytesAsPixels(),
                 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 SkBitmap::kARGB_4444_Config:
     case SkBitmap::kIndex8_Config:
         glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
         uploadLoFiTexture(resize, bitmap, texture->width, texture->height);
         texture->blend = !bitmap->isOpaque();
         break;
     default:
         ALOGW("Unsupported bitmap config: %d", bitmap->config());
         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.setConfig(SkBitmap::kARGB_8888_Config, width, height, 0, bitmap->alphaType());
     rgbaBitmap.allocPixels();
     rgbaBitmap.eraseColor(0);

     SkCanvas canvas(rgbaBitmap);
     canvas.drawBitmap(*bitmap, 0.0f, 0.0f, NULL);

     uploadToTexture(resize, GL_RGBA, rgbaBitmap.rowBytesAsPixels(), width, height,
             GL_UNSIGNED_BYTE, rgbaBitmap.getPixels());
 }

 void TextureCache::uploadToTexture(bool resize, GLenum format, GLsizei stride,
         GLsizei width, GLsizei height, GLenum type, const GLvoid * data) {
     // TODO: With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
     //       if the stride doesn't match the width
     const bool useStride = stride != width && Extensions::getInstance().hasUnpackRowLength();
     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);
     }
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* 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 SkBitmap, 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 SkBitmap, 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 SkBitmap&, 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 SkBitmap, 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);

	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, 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);
	}

	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);
	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->config()) {
	case SkBitmap::kA8_Config:
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	uploadToTexture(resize, GL_ALPHA, bitmap->rowBytesAsPixels(),
	texture->width, texture->height, GL_UNSIGNED_BYTE, bitmap->getPixels());
	texture->blend = true;
	break;
	case SkBitmap::kRGB_565_Config:
	glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
	uploadToTexture(resize, GL_RGB, bitmap->rowBytesAsPixels(),
	texture->width, texture->height, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
	texture->blend = false;
	break;
	case SkBitmap::kARGB_8888_Config:
	glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
	uploadToTexture(resize, GL_RGBA, bitmap->rowBytesAsPixels(),
	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 SkBitmap::kARGB_4444_Config:
	case SkBitmap::kIndex8_Config:
	glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
	uploadLoFiTexture(resize, bitmap, texture->width, texture->height);
	texture->blend = !bitmap->isOpaque();
	break;
	default:
	ALOGW("Unsupported bitmap config: %d", bitmap->config());
	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.setConfig(SkBitmap::kARGB_8888_Config, width, height, 0, bitmap->alphaType());
	rgbaBitmap.allocPixels();
	rgbaBitmap.eraseColor(0);

	SkCanvas canvas(rgbaBitmap);
	canvas.drawBitmap(*bitmap, 0.0f, 0.0f, NULL);

	uploadToTexture(resize, GL_RGBA, rgbaBitmap.rowBytesAsPixels(), width, height,
	GL_UNSIGNED_BYTE, rgbaBitmap.getPixels());
	}

	void TextureCache::uploadToTexture(bool resize, GLenum format, GLsizei stride,
	GLsizei width, GLsizei height, GLenum type, const GLvoid * data) {
	// TODO: With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
	// if the stride doesn't match the width
	const bool useStride = stride != width && Extensions::getInstance().hasUnpackRowLength();
	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);
	}
	}

	}; // namespace uirenderer
	}; // namespace android