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 "Debug.h" 20#include "TextDropShadowCache.h" 21#include "Properties.h" 22 23namespace android { 24namespace uirenderer { 25 26/////////////////////////////////////////////////////////////////////////////// 27// Constructors/destructor 28/////////////////////////////////////////////////////////////////////////////// 29 30TextDropShadowCache::TextDropShadowCache(): 31 mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity), 32 mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) { 33 char property[PROPERTY_VALUE_MAX]; 34 if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, NULL) > 0) { 35 INIT_LOGD(" Setting drop shadow cache size to %sMB", property); 36 setMaxSize(MB(atof(property))); 37 } else { 38 INIT_LOGD(" Using default drop shadow cache size of %.2fMB", 39 DEFAULT_DROP_SHADOW_CACHE_SIZE); 40 } 41 42 init(); 43} 44 45TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize): 46 mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity), 47 mSize(0), mMaxSize(maxByteSize) { 48 init(); 49} 50 51TextDropShadowCache::~TextDropShadowCache() { 52 mCache.clear(); 53} 54 55void TextDropShadowCache::init() { 56 mCache.setOnEntryRemovedListener(this); 57 mDebugEnabled = readDebugLevel() & kDebugMoreCaches; 58} 59 60/////////////////////////////////////////////////////////////////////////////// 61// Size management 62/////////////////////////////////////////////////////////////////////////////// 63 64uint32_t TextDropShadowCache::getSize() { 65 return mSize; 66} 67 68uint32_t TextDropShadowCache::getMaxSize() { 69 return mMaxSize; 70} 71 72void TextDropShadowCache::setMaxSize(uint32_t maxSize) { 73 mMaxSize = maxSize; 74 while (mSize > mMaxSize) { 75 mCache.removeOldest(); 76 } 77} 78 79/////////////////////////////////////////////////////////////////////////////// 80// Callbacks 81/////////////////////////////////////////////////////////////////////////////// 82 83void TextDropShadowCache::operator()(ShadowText& text, ShadowTexture*& texture) { 84 if (texture) { 85 mSize -= texture->bitmapSize; 86 87 if (mDebugEnabled) { 88 ALOGD("Shadow texture deleted, size = %d", texture->bitmapSize); 89 } 90 91 glDeleteTextures(1, &texture->id); 92 delete texture; 93 } 94} 95 96/////////////////////////////////////////////////////////////////////////////// 97// Caching 98/////////////////////////////////////////////////////////////////////////////// 99 100void TextDropShadowCache::clear() { 101 mCache.clear(); 102} 103 104ShadowTexture* TextDropShadowCache::get(SkPaint* paint, const char* text, uint32_t len, 105 int numGlyphs, uint32_t radius, const float* positions) { 106 ShadowText entry(paint, radius, len, text, positions); 107 ShadowTexture* texture = mCache.get(entry); 108 109 if (!texture) { 110 SkPaint paintCopy(*paint); 111 paintCopy.setTextAlign(SkPaint::kLeft_Align); 112 FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(&paintCopy, text, 0, 113 len, numGlyphs, radius, positions); 114 115 texture = new ShadowTexture; 116 texture->left = shadow.penX; 117 texture->top = shadow.penY; 118 texture->width = shadow.width; 119 texture->height = shadow.height; 120 texture->generation = 0; 121 texture->blend = true; 122 123 const uint32_t size = shadow.width * shadow.height; 124 texture->bitmapSize = size; 125 126 // Don't even try to cache a bitmap that's bigger than the cache 127 if (size < mMaxSize) { 128 while (mSize + size > mMaxSize) { 129 mCache.removeOldest(); 130 } 131 } 132 133 glGenTextures(1, &texture->id); 134 135 glBindTexture(GL_TEXTURE_2D, texture->id); 136 // Textures are Alpha8 137 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); 138 139 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0, 140 GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image); 141 142 texture->setFilter(GL_LINEAR); 143 texture->setWrap(GL_CLAMP_TO_EDGE); 144 145 if (size < mMaxSize) { 146 if (mDebugEnabled) { 147 ALOGD("Shadow texture created, size = %d", texture->bitmapSize); 148 } 149 150 entry.copyTextLocally(); 151 152 mSize += size; 153 mCache.put(entry, texture); 154 } else { 155 texture->cleanup = true; 156 } 157 158 // Cleanup shadow 159 delete[] shadow.image; 160 } 161 162 return texture; 163} 164 165}; // namespace uirenderer 166}; // namespace android 167