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 24 namespace android { 25 namespace uirenderer { 26 27 /////////////////////////////////////////////////////////////////////////////// 28 // Lifecycle 29 /////////////////////////////////////////////////////////////////////////////// 30 31 void AssetAtlas::init(sp<GraphicBuffer> buffer, int64_t* map, int count) { 32 if (mImage) { 33 return; 34 } 35 36 ATRACE_NAME("AssetAtlas::init"); 37 38 mImage = new Image(buffer); 39 if (mImage->getTexture()) { 40 if (!mTexture) { 41 Caches& caches = Caches::getInstance(); 42 mTexture = new Texture(caches); 43 mTexture->width = buffer->getWidth(); 44 mTexture->height = buffer->getHeight(); 45 createEntries(caches, map, count); 46 } 47 } else { 48 ALOGW("Could not create atlas image"); 49 delete mImage; 50 mImage = NULL; 51 } 52 53 updateTextureId(); 54 } 55 56 void AssetAtlas::terminate() { 57 if (mImage) { 58 delete mImage; 59 mImage = NULL; 60 updateTextureId(); 61 } 62 } 63 64 65 void AssetAtlas::updateTextureId() { 66 mTexture->id = mImage ? mImage->getTexture() : 0; 67 if (mTexture->id) { 68 // Texture ID changed, force-set to defaults to sync the wrapper & GL 69 // state objects 70 mTexture->setWrap(GL_CLAMP_TO_EDGE, false, true); 71 mTexture->setFilter(GL_NEAREST, false, true); 72 } 73 for (size_t i = 0; i < mEntries.size(); i++) { 74 AssetAtlas::Entry* entry = mEntries.valueAt(i); 75 entry->texture->id = mTexture->id; 76 } 77 } 78 79 /////////////////////////////////////////////////////////////////////////////// 80 // Entries 81 /////////////////////////////////////////////////////////////////////////////// 82 83 AssetAtlas::Entry* AssetAtlas::getEntry(const SkBitmap* bitmap) const { 84 ssize_t index = mEntries.indexOfKey(bitmap); 85 return index >= 0 ? mEntries.valueAt(index) : NULL; 86 } 87 88 Texture* AssetAtlas::getEntryTexture(const SkBitmap* bitmap) const { 89 ssize_t index = mEntries.indexOfKey(bitmap); 90 return index >= 0 ? mEntries.valueAt(index)->texture : NULL; 91 } 92 93 /** 94 * Delegates changes to wrapping and filtering to the base atlas texture 95 * instead of applying the changes to the virtual textures. 96 */ 97 struct DelegateTexture: public Texture { 98 DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { } 99 100 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, 101 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 102 mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget); 103 } 104 105 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, 106 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 107 mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget); 108 } 109 110 private: 111 Texture* const mDelegate; 112 }; // struct DelegateTexture 113 114 /** 115 * TODO: This method does not take the rotation flag into account 116 */ 117 void AssetAtlas::createEntries(Caches& caches, int64_t* map, int count) { 118 const float width = float(mTexture->width); 119 const float height = float(mTexture->height); 120 121 for (int i = 0; i < count; ) { 122 SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(map[i++]); 123 // NOTE: We're converting from 64 bit signed values to 32 bit 124 // signed values. This is guaranteed to be safe because the "x" 125 // and "y" coordinate values are guaranteed to be representable 126 // with 32 bits. The array is 64 bits wide so that it can carry 127 // pointers on 64 bit architectures. 128 const int x = static_cast<int>(map[i++]); 129 const int y = static_cast<int>(map[i++]); 130 bool rotated = map[i++] > 0; 131 132 // Bitmaps should never be null, we're just extra paranoid 133 if (!bitmap) continue; 134 135 const UvMapper mapper( 136 x / width, (x + bitmap->width()) / width, 137 y / height, (y + bitmap->height()) / height); 138 139 Texture* texture = new DelegateTexture(caches, mTexture); 140 texture->blend = !bitmap->isOpaque(); 141 texture->width = bitmap->width(); 142 texture->height = bitmap->height(); 143 144 Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this); 145 texture->uvMapper = &entry->uvMapper; 146 147 mEntries.add(entry->bitmap, entry); 148 } 149 } 150 151 }; // namespace uirenderer 152 }; // namespace android 153