161 lines
4.6 KiB
C++
161 lines
4.6 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "OpenGLRenderer"
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#include <GLES2/gl2.h>
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#include <SkCanvas.h>
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#include <SkGradientShader.h>
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#include "GradientCache.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Constructors/destructor
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///////////////////////////////////////////////////////////////////////////////
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GradientCache::GradientCache(uint32_t maxByteSize):
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mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity),
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mSize(0), mMaxSize(maxByteSize) {
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mCache.setOnEntryRemovedListener(this);
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}
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GradientCache::~GradientCache() {
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mCache.clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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// Size management
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///////////////////////////////////////////////////////////////////////////////
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uint32_t GradientCache::getSize() {
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return mSize;
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}
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uint32_t GradientCache::getMaxSize() {
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return mMaxSize;
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}
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void GradientCache::setMaxSize(uint32_t maxSize) {
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mMaxSize = maxSize;
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while (mSize > mMaxSize) {
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mCache.removeOldest();
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Callbacks
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///////////////////////////////////////////////////////////////////////////////
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void GradientCache::operator()(SkShader*& shader, Texture*& texture) {
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if (shader) {
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const uint32_t size = texture->width * texture->height * 4;
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mSize -= size;
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}
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if (texture) {
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glDeleteTextures(1, &texture->id);
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delete texture;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Caching
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///////////////////////////////////////////////////////////////////////////////
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Texture* GradientCache::get(SkShader* shader) {
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Texture* texture = mCache.get(shader);
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return texture;
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}
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void GradientCache::remove(SkShader* shader) {
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mCache.remove(shader);
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}
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void GradientCache::clear() {
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mCache.clear();
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}
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Texture* GradientCache::addLinearGradient(SkShader* shader, float* bounds, uint32_t* colors,
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float* positions, int count, SkShader::TileMode tileMode) {
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SkBitmap bitmap;
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bitmap.setConfig(SkBitmap::kARGB_8888_Config, 1024, 1);
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bitmap.allocPixels();
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bitmap.eraseColor(0);
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SkCanvas canvas(bitmap);
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SkPoint points[2];
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points[0].set(0.0f, 0.0f);
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points[1].set(bitmap.width(), 0.0f);
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SkShader* localShader = SkGradientShader::CreateLinear(points,
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reinterpret_cast<const SkColor*>(colors), positions, count, tileMode);
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SkPaint p;
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p.setStyle(SkPaint::kStrokeAndFill_Style);
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p.setShader(localShader)->unref();
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canvas.drawRectCoords(0.0f, 0.0f, bitmap.width(), 1.0f, p);
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// Asume the cache is always big enough
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const uint32_t size = bitmap.rowBytes() * bitmap.height();
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while (mSize + size > mMaxSize) {
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mCache.removeOldest();
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}
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Texture* texture = new Texture;
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generateTexture(&bitmap, texture);
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mSize += size;
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mCache.put(shader, texture);
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return texture;
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}
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void GradientCache::generateTexture(SkBitmap* bitmap, Texture* texture) {
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SkAutoLockPixels autoLock(*bitmap);
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if (!bitmap->readyToDraw()) {
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LOGE("Cannot generate texture from shader");
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return;
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}
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texture->generation = bitmap->getGenerationID();
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texture->width = bitmap->width();
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texture->height = bitmap->height();
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glGenTextures(1, &texture->id);
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glBindTexture(GL_TEXTURE_2D, texture->id);
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glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel());
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texture->blend = !bitmap->isOpaque();
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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}
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}; // namespace uirenderer
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}; // namespace android
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