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 "Debug.h" 27 #include "GradientCache.h" 28 #include "Properties.h" 29 30 namespace android { 31 namespace uirenderer { 32 33 /////////////////////////////////////////////////////////////////////////////// 34 // Constructors/destructor 35 /////////////////////////////////////////////////////////////////////////////// 36 37 GradientCache::GradientCache(): 38 mCache(GenerationCache<GradientCacheEntry, Texture*>::kUnlimitedCapacity), 39 mSize(0), mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) { 40 char property[PROPERTY_VALUE_MAX]; 41 if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, NULL) > 0) { 42 INIT_LOGD(" Setting gradient cache size to %sMB", property); 43 setMaxSize(MB(atof(property))); 44 } else { 45 INIT_LOGD(" Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE); 46 } 47 48 mCache.setOnEntryRemovedListener(this); 49 } 50 51 GradientCache::GradientCache(uint32_t maxByteSize): 52 mCache(GenerationCache<GradientCacheEntry, Texture*>::kUnlimitedCapacity), 53 mSize(0), mMaxSize(maxByteSize) { 54 mCache.setOnEntryRemovedListener(this); 55 } 56 57 GradientCache::~GradientCache() { 58 mCache.clear(); 59 } 60 61 /////////////////////////////////////////////////////////////////////////////// 62 // Size management 63 /////////////////////////////////////////////////////////////////////////////// 64 65 uint32_t GradientCache::getSize() { 66 return mSize; 67 } 68 69 uint32_t GradientCache::getMaxSize() { 70 return mMaxSize; 71 } 72 73 void GradientCache::setMaxSize(uint32_t maxSize) { 74 mMaxSize = maxSize; 75 while (mSize > mMaxSize) { 76 mCache.removeOldest(); 77 } 78 } 79 80 /////////////////////////////////////////////////////////////////////////////// 81 // Callbacks 82 /////////////////////////////////////////////////////////////////////////////// 83 84 void GradientCache::operator()(GradientCacheEntry& shader, Texture*& texture) { 85 if (texture) { 86 const uint32_t size = texture->width * texture->height * 4; 87 mSize -= size; 88 } 89 90 if (texture) { 91 glDeleteTextures(1, &texture->id); 92 delete texture; 93 } 94 } 95 96 /////////////////////////////////////////////////////////////////////////////// 97 // Caching 98 /////////////////////////////////////////////////////////////////////////////// 99 100 Texture* GradientCache::get(uint32_t* colors, float* positions, 101 int count, SkShader::TileMode tileMode) { 102 103 GradientCacheEntry gradient(colors, positions, count, tileMode); 104 Texture* texture = mCache.get(gradient); 105 106 if (!texture) { 107 texture = addLinearGradient(gradient, colors, positions, count, tileMode); 108 } 109 110 return texture; 111 } 112 113 void GradientCache::clear() { 114 mCache.clear(); 115 } 116 117 Texture* GradientCache::addLinearGradient(GradientCacheEntry& gradient, 118 uint32_t* colors, float* positions, int count, SkShader::TileMode tileMode) { 119 SkBitmap bitmap; 120 bitmap.setConfig(SkBitmap::kARGB_8888_Config, 1024, 1); 121 bitmap.allocPixels(); 122 bitmap.eraseColor(0); 123 124 SkCanvas canvas(bitmap); 125 126 SkPoint points[2]; 127 points[0].set(0.0f, 0.0f); 128 points[1].set(bitmap.width(), 0.0f); 129 130 SkShader* localShader = SkGradientShader::CreateLinear(points, 131 reinterpret_cast<const SkColor*>(colors), positions, count, tileMode); 132 133 SkPaint p; 134 p.setStyle(SkPaint::kStrokeAndFill_Style); 135 p.setShader(localShader)->unref(); 136 137 canvas.drawRectCoords(0.0f, 0.0f, bitmap.width(), 1.0f, p); 138 139 // Asume the cache is always big enough 140 const uint32_t size = bitmap.rowBytes() * bitmap.height(); 141 while (mSize + size > mMaxSize) { 142 mCache.removeOldest(); 143 } 144 145 Texture* texture = new Texture; 146 generateTexture(&bitmap, texture); 147 148 mSize += size; 149 mCache.put(gradient, texture); 150 151 return texture; 152 } 153 154 void GradientCache::generateTexture(SkBitmap* bitmap, Texture* texture) { 155 SkAutoLockPixels autoLock(*bitmap); 156 if (!bitmap->readyToDraw()) { 157 ALOGE("Cannot generate texture from shader"); 158 return; 159 } 160 161 texture->generation = bitmap->getGenerationID(); 162 texture->width = bitmap->width(); 163 texture->height = bitmap->height(); 164 165 glGenTextures(1, &texture->id); 166 167 glBindTexture(GL_TEXTURE_2D, texture->id); 168 glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel()); 169 170 texture->blend = !bitmap->isOpaque(); 171 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0, 172 GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels()); 173 174 texture->setFilter(GL_LINEAR); 175 texture->setWrap(GL_CLAMP_TO_EDGE); 176 } 177 178 }; // namespace uirenderer 179 }; // namespace android 180
