GradientCache.cpp revision ee916f14cbd1fe1422c063ce2ef7b185e2bc5c6f
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "OpenGLRenderer" 18 19#include <GLES2/gl2.h> 20 21#include <SkCanvas.h> 22#include <SkGradientShader.h> 23 24#include <utils/threads.h> 25 26#include "GradientCache.h" 27#include "Properties.h" 28 29namespace android { 30namespace uirenderer { 31 32/////////////////////////////////////////////////////////////////////////////// 33// Constructors/destructor 34/////////////////////////////////////////////////////////////////////////////// 35 36GradientCache::GradientCache(): 37 mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity), 38 mSize(0), mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) { 39 char property[PROPERTY_VALUE_MAX]; 40 if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, NULL) > 0) { 41 LOGD(" Setting gradient cache size to %sMB", property); 42 setMaxSize(MB(atof(property))); 43 } else { 44 LOGD(" Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE); 45 } 46 47 mCache.setOnEntryRemovedListener(this); 48} 49 50GradientCache::GradientCache(uint32_t maxByteSize): 51 mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity), 52 mSize(0), mMaxSize(maxByteSize) { 53 mCache.setOnEntryRemovedListener(this); 54} 55 56GradientCache::~GradientCache() { 57 Mutex::Autolock _l(mLock); 58 mCache.clear(); 59} 60 61/////////////////////////////////////////////////////////////////////////////// 62// Size management 63/////////////////////////////////////////////////////////////////////////////// 64 65uint32_t GradientCache::getSize() { 66 Mutex::Autolock _l(mLock); 67 return mSize; 68} 69 70uint32_t GradientCache::getMaxSize() { 71 Mutex::Autolock _l(mLock); 72 return mMaxSize; 73} 74 75void GradientCache::setMaxSize(uint32_t maxSize) { 76 Mutex::Autolock _l(mLock); 77 mMaxSize = maxSize; 78 while (mSize > mMaxSize) { 79 mCache.removeOldest(); 80 } 81} 82 83/////////////////////////////////////////////////////////////////////////////// 84// Callbacks 85/////////////////////////////////////////////////////////////////////////////// 86 87void GradientCache::operator()(SkShader*& shader, Texture*& texture) { 88 // Already locked here 89 if (shader) { 90 const uint32_t size = texture->width * texture->height * 4; 91 mSize -= size; 92 } 93 94 if (texture) { 95 glDeleteTextures(1, &texture->id); 96 delete texture; 97 } 98} 99 100/////////////////////////////////////////////////////////////////////////////// 101// Caching 102/////////////////////////////////////////////////////////////////////////////// 103 104Texture* GradientCache::get(SkShader* shader) { 105 Mutex::Autolock _l(mLock); 106 return mCache.get(shader); 107} 108 109void GradientCache::remove(SkShader* shader) { 110 Mutex::Autolock _l(mLock); 111 mCache.remove(shader); 112} 113 114void GradientCache::clear() { 115 Mutex::Autolock _l(mLock); 116 mCache.clear(); 117} 118 119Texture* GradientCache::addLinearGradient(SkShader* shader, uint32_t* colors, 120 float* positions, int count, SkShader::TileMode tileMode) { 121 SkBitmap bitmap; 122 bitmap.setConfig(SkBitmap::kARGB_8888_Config, 1024, 1); 123 bitmap.allocPixels(); 124 bitmap.eraseColor(0); 125 126 SkCanvas canvas(bitmap); 127 128 SkPoint points[2]; 129 points[0].set(0.0f, 0.0f); 130 points[1].set(bitmap.width(), 0.0f); 131 132 SkShader* localShader = SkGradientShader::CreateLinear(points, 133 reinterpret_cast<const SkColor*>(colors), positions, count, tileMode); 134 135 SkPaint p; 136 p.setStyle(SkPaint::kStrokeAndFill_Style); 137 p.setShader(localShader)->unref(); 138 139 canvas.drawRectCoords(0.0f, 0.0f, bitmap.width(), 1.0f, p); 140 141 mLock.lock(); 142 // Asume the cache is always big enough 143 const uint32_t size = bitmap.rowBytes() * bitmap.height(); 144 while (mSize + size > mMaxSize) { 145 mCache.removeOldest(); 146 } 147 mLock.unlock(); 148 149 Texture* texture = new Texture; 150 generateTexture(&bitmap, texture); 151 152 mLock.lock(); 153 mSize += size; 154 mCache.put(shader, texture); 155 mLock.unlock(); 156 157 return texture; 158} 159 160void GradientCache::generateTexture(SkBitmap* bitmap, Texture* texture) { 161 SkAutoLockPixels autoLock(*bitmap); 162 if (!bitmap->readyToDraw()) { 163 LOGE("Cannot generate texture from shader"); 164 return; 165 } 166 167 texture->generation = bitmap->getGenerationID(); 168 texture->width = bitmap->width(); 169 texture->height = bitmap->height(); 170 171 glGenTextures(1, &texture->id); 172 173 glBindTexture(GL_TEXTURE_2D, texture->id); 174 glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel()); 175 176 texture->blend = !bitmap->isOpaque(); 177 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0, 178 GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels()); 179 180 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 181 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 182 183 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 184 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 185} 186 187}; // namespace uirenderer 188}; // namespace android 189