AssetAtlas.cpp revision 55b6f95ee4ace96c97508bcd14483fb4e9dbeaa0
1/* 2 * Copyright (C) 2013 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 "AssetAtlas.h" 20#include "Caches.h" 21 22#include <GLES2/gl2ext.h> 23 24namespace android { 25namespace uirenderer { 26 27/////////////////////////////////////////////////////////////////////////////// 28// Lifecycle 29/////////////////////////////////////////////////////////////////////////////// 30 31void AssetAtlas::init(sp<GraphicBuffer> buffer, int* map, int count) { 32 if (mImage) { 33 return; 34 } 35 36 mImage = new Image(buffer); 37 38 if (mImage->getTexture()) { 39 Caches& caches = Caches::getInstance(); 40 41 mTexture = new Texture(caches); 42 mTexture->id = mImage->getTexture(); 43 mTexture->width = buffer->getWidth(); 44 mTexture->height = buffer->getHeight(); 45 46 createEntries(caches, map, count); 47 } else { 48 ALOGW("Could not create atlas image"); 49 50 delete mImage; 51 mImage = NULL; 52 mTexture = NULL; 53 } 54 55 mGenerationId++; 56} 57 58void AssetAtlas::terminate() { 59 if (mImage) { 60 delete mImage; 61 mImage = NULL; 62 63 delete mTexture; 64 mTexture = NULL; 65 66 for (size_t i = 0; i < mEntries.size(); i++) { 67 delete mEntries.valueAt(i); 68 } 69 mEntries.clear(); 70 } 71} 72 73/////////////////////////////////////////////////////////////////////////////// 74// Entries 75/////////////////////////////////////////////////////////////////////////////// 76 77AssetAtlas::Entry* AssetAtlas::getEntry(SkBitmap* const bitmap) const { 78 ssize_t index = mEntries.indexOfKey(bitmap); 79 return index >= 0 ? mEntries.valueAt(index) : NULL; 80} 81 82Texture* AssetAtlas::getEntryTexture(SkBitmap* const bitmap) const { 83 ssize_t index = mEntries.indexOfKey(bitmap); 84 return index >= 0 ? mEntries.valueAt(index)->texture : NULL; 85} 86 87/** 88 * Delegates changes to wrapping and filtering to the base atlas texture 89 * instead of applying the changes to the virtual textures. 90 */ 91struct DelegateTexture: public Texture { 92 DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { } 93 94 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, 95 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 96 mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget); 97 } 98 99 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, 100 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 101 mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget); 102 } 103private: 104 Texture* const mDelegate; 105}; // struct DelegateTexture 106 107/** 108 * TODO: This method does not take the rotation flag into account 109 */ 110void AssetAtlas::createEntries(Caches& caches, int* map, int count) { 111 const float width = float(mTexture->width); 112 const float height = float(mTexture->height); 113 114 for (int i = 0; i < count; ) { 115 SkBitmap* bitmap = (SkBitmap*) map[i++]; 116 int x = map[i++]; 117 int y = map[i++]; 118 bool rotated = map[i++] > 0; 119 120 // Bitmaps should never be null, we're just extra paranoid 121 if (!bitmap) continue; 122 123 const UvMapper mapper( 124 x / width, (x + bitmap->width()) / width, 125 y / height, (y + bitmap->height()) / height); 126 127 Texture* texture = new DelegateTexture(caches, mTexture); 128 Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this); 129 130 texture->id = mTexture->id; 131 texture->blend = !bitmap->isOpaque(); 132 texture->width = bitmap->width(); 133 texture->height = bitmap->height(); 134 texture->uvMapper = &entry->uvMapper; 135 136 mEntries.add(entry->bitmap, entry); 137 } 138} 139 140}; // namespace uirenderer 141}; // namespace android 142