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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 <SkGradientShader.h>
#include "GradientCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
GradientCache::GradientCache():
mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, NULL) > 0) {
LOGD(" Setting gradient cache size to %sMB", property);
setMaxSize(MB(atof(property)));
} else {
LOGD(" Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE);
}
mCache.setOnEntryRemovedListener(this);
}
GradientCache::GradientCache(uint32_t maxByteSize):
mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(maxByteSize) {
mCache.setOnEntryRemovedListener(this);
}
GradientCache::~GradientCache() {
mCache.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t GradientCache::getSize() {
return mSize;
}
uint32_t GradientCache::getMaxSize() {
return mMaxSize;
}
void GradientCache::setMaxSize(uint32_t maxSize) {
mMaxSize = maxSize;
while (mSize > mMaxSize) {
mCache.removeOldest();
}
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void GradientCache::operator()(SkShader*& shader, Texture*& texture) {
if (shader) {
const uint32_t size = texture->width * texture->height * 4;
mSize -= size;
}
if (texture) {
glDeleteTextures(1, &texture->id);
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
Texture* GradientCache::get(SkShader* shader) {
return mCache.get(shader);
}
void GradientCache::remove(SkShader* shader) {
mCache.remove(shader);
}
void GradientCache::clear() {
mCache.clear();
}
Texture* GradientCache::addLinearGradient(SkShader* shader, float* bounds, uint32_t* colors,
float* positions, int count, SkShader::TileMode tileMode) {
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, 1024, 1);
bitmap.allocPixels();
bitmap.eraseColor(0);
SkCanvas canvas(bitmap);
SkPoint points[2];
points[0].set(0.0f, 0.0f);
points[1].set(bitmap.width(), 0.0f);
SkShader* localShader = SkGradientShader::CreateLinear(points,
reinterpret_cast<const SkColor*>(colors), positions, count, tileMode);
SkPaint p;
p.setStyle(SkPaint::kStrokeAndFill_Style);
p.setShader(localShader)->unref();
canvas.drawRectCoords(0.0f, 0.0f, bitmap.width(), 1.0f, p);
// Asume the cache is always big enough
const uint32_t size = bitmap.rowBytes() * bitmap.height();
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
Texture* texture = new Texture;
generateTexture(&bitmap, texture);
mSize += size;
mCache.put(shader, texture);
return texture;
}
void GradientCache::generateTexture(SkBitmap* bitmap, Texture* texture) {
SkAutoLockPixels autoLock(*bitmap);
if (!bitmap->readyToDraw()) {
LOGE("Cannot generate texture from shader");
return;
}
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());
texture->blend = !bitmap->isOpaque();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels());
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);
}
}; // namespace uirenderer
}; // namespace android