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 #include "Image.h" 22 23 #include <GLES2/gl2ext.h> 24 25 namespace android { 26 namespace uirenderer { 27 28 /////////////////////////////////////////////////////////////////////////////// 29 // Lifecycle 30 /////////////////////////////////////////////////////////////////////////////// 31 32 void AssetAtlas::init(sp<GraphicBuffer> buffer, int64_t* map, int count) { 33 if (mImage) { 34 return; 35 } 36 37 ATRACE_NAME("AssetAtlas::init"); 38 39 mImage = new Image(buffer); 40 if (mImage->getTexture()) { 41 if (!mTexture) { 42 Caches& caches = Caches::getInstance(); 43 mTexture = new Texture(caches); 44 mTexture->width = buffer->getWidth(); 45 mTexture->height = buffer->getHeight(); 46 createEntries(caches, map, count); 47 } 48 } else { 49 ALOGW("Could not create atlas image"); 50 delete mImage; 51 mImage = nullptr; 52 } 53 54 updateTextureId(); 55 } 56 57 void AssetAtlas::terminate() { 58 if (mImage) { 59 delete mImage; 60 mImage = nullptr; 61 updateTextureId(); 62 } 63 } 64 65 66 void AssetAtlas::updateTextureId() { 67 mTexture->id = mImage ? mImage->getTexture() : 0; 68 if (mTexture->id) { 69 // Texture ID changed, force-set to defaults to sync the wrapper & GL 70 // state objects 71 mTexture->setWrap(GL_CLAMP_TO_EDGE, false, true); 72 mTexture->setFilter(GL_NEAREST, false, true); 73 } 74 for (size_t i = 0; i < mEntries.size(); i++) { 75 AssetAtlas::Entry* entry = mEntries.valueAt(i); 76 entry->texture->id = mTexture->id; 77 } 78 } 79 80 /////////////////////////////////////////////////////////////////////////////// 81 // Entries 82 /////////////////////////////////////////////////////////////////////////////// 83 84 AssetAtlas::Entry* AssetAtlas::getEntry(const SkBitmap* bitmap) const { 85 ssize_t index = mEntries.indexOfKey(bitmap->pixelRef()); 86 return index >= 0 ? mEntries.valueAt(index) : nullptr; 87 } 88 89 Texture* AssetAtlas::getEntryTexture(const SkBitmap* bitmap) const { 90 ssize_t index = mEntries.indexOfKey(bitmap->pixelRef()); 91 return index >= 0 ? mEntries.valueAt(index)->texture : nullptr; 92 } 93 94 /** 95 * Delegates changes to wrapping and filtering to the base atlas texture 96 * instead of applying the changes to the virtual textures. 97 */ 98 struct DelegateTexture: public Texture { 99 DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { } 100 101 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, 102 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) override { 103 mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget); 104 } 105 106 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, 107 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) override { 108 mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget); 109 } 110 111 private: 112 Texture* const mDelegate; 113 }; // struct DelegateTexture 114 115 void AssetAtlas::createEntries(Caches& caches, int64_t* map, int count) { 116 const float width = float(mTexture->width); 117 const float height = float(mTexture->height); 118 119 for (int i = 0; i < count; ) { 120 SkPixelRef* pixelRef = reinterpret_cast<SkPixelRef*>(map[i++]); 121 // NOTE: We're converting from 64 bit signed values to 32 bit 122 // signed values. This is guaranteed to be safe because the "x" 123 // and "y" coordinate values are guaranteed to be representable 124 // with 32 bits. The array is 64 bits wide so that it can carry 125 // pointers on 64 bit architectures. 126 const int x = static_cast<int>(map[i++]); 127 const int y = static_cast<int>(map[i++]); 128 129 // Bitmaps should never be null, we're just extra paranoid 130 if (!pixelRef) continue; 131 132 const UvMapper mapper( 133 x / width, (x + pixelRef->info().width()) / width, 134 y / height, (y + pixelRef->info().height()) / height); 135 136 Texture* texture = new DelegateTexture(caches, mTexture); 137 texture->blend = !SkAlphaTypeIsOpaque(pixelRef->info().alphaType()); 138 texture->width = pixelRef->info().width(); 139 texture->height = pixelRef->info().height(); 140 141 Entry* entry = new Entry(pixelRef, texture, mapper, *this); 142 texture->uvMapper = &entry->uvMapper; 143 144 mEntries.add(entry->pixelRef, entry); 145 } 146 } 147 148 }; // namespace uirenderer 149 }; // namespace android 150