AssetAtlas.cpp revision 59cf734f9ee8fa0154d199f0f36779a6ffe0dfb5
1affc150dc44fab1911775a49636d0ce85333b634Zonr Chang/* 2affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * Copyright (C) 2013 The Android Open Source Project 3affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * 4affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * Licensed under the Apache License, Version 2.0 (the "License"); 5affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * you may not use this file except in compliance with the License. 6affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * You may obtain a copy of the License at 7affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * 8affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * http://www.apache.org/licenses/LICENSE-2.0 937b74a387bb3993387029859c2d9d051c41c724eStephen Hines * 1037b74a387bb3993387029859c2d9d051c41c724eStephen Hines * Unless required by applicable law or agreed to in writing, software 11affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * distributed under the License is distributed on an "AS IS" BASIS, 1237b74a387bb3993387029859c2d9d051c41c724eStephen Hines * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1337b74a387bb3993387029859c2d9d051c41c724eStephen Hines * See the License for the specific language governing permissions and 1437b74a387bb3993387029859c2d9d051c41c724eStephen Hines * limitations under the License. 1537b74a387bb3993387029859c2d9d051c41c724eStephen Hines */ 16affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 17affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#define LOG_TAG "OpenGLRenderer" 18affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 19affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include "AssetAtlas.h" 20affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include "Caches.h" 2137b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "Image.h" 2237b74a387bb3993387029859c2d9d051c41c724eStephen Hines 23affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include <GLES2/gl2ext.h> 24affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 25affc150dc44fab1911775a49636d0ce85333b634Zonr Changnamespace android { 26affc150dc44fab1911775a49636d0ce85333b634Zonr Changnamespace uirenderer { 2722add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao 28affc150dc44fab1911775a49636d0ce85333b634Zonr Chang/////////////////////////////////////////////////////////////////////////////// 29affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// Lifecycle 30affc150dc44fab1911775a49636d0ce85333b634Zonr Chang/////////////////////////////////////////////////////////////////////////////// 31affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 32affc150dc44fab1911775a49636d0ce85333b634Zonr Changvoid AssetAtlas::init(sp<GraphicBuffer> buffer, int64_t* map, int count) { 3337b74a387bb3993387029859c2d9d051c41c724eStephen Hines if (mImage) { 34affc150dc44fab1911775a49636d0ce85333b634Zonr Chang return; 35affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 36affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 37affc150dc44fab1911775a49636d0ce85333b634Zonr Chang ATRACE_NAME("AssetAtlas::init"); 38affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 39affc150dc44fab1911775a49636d0ce85333b634Zonr Chang mImage = new Image(buffer); 4022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao if (mImage->getTexture()) { 4122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao if (!mTexture) { 42affc150dc44fab1911775a49636d0ce85333b634Zonr Chang Caches& caches = Caches::getInstance(); 4337b74a387bb3993387029859c2d9d051c41c724eStephen Hines mTexture = new Texture(caches); 44affc150dc44fab1911775a49636d0ce85333b634Zonr Chang mTexture->width = buffer->getWidth(); 45affc150dc44fab1911775a49636d0ce85333b634Zonr Chang mTexture->height = buffer->getHeight(); 46affc150dc44fab1911775a49636d0ce85333b634Zonr Chang createEntries(caches, map, count); 47affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 4837b74a387bb3993387029859c2d9d051c41c724eStephen Hines } else { 49affc150dc44fab1911775a49636d0ce85333b634Zonr Chang ALOGW("Could not create atlas image"); 5037b74a387bb3993387029859c2d9d051c41c724eStephen Hines delete mImage; 51 mImage = NULL; 52 } 53 54 updateTextureId(); 55} 56 57void AssetAtlas::terminate() { 58 if (mImage) { 59 delete mImage; 60 mImage = NULL; 61 updateTextureId(); 62 } 63} 64 65 66void AssetAtlas::updateTextureId() { 67 mTexture->id = mImage ? mImage->getTexture() : 0; 68 for (size_t i = 0; i < mEntries.size(); i++) { 69 AssetAtlas::Entry* entry = mEntries.valueAt(i); 70 entry->texture->id = mTexture->id; 71 } 72} 73 74/////////////////////////////////////////////////////////////////////////////// 75// Entries 76/////////////////////////////////////////////////////////////////////////////// 77 78AssetAtlas::Entry* AssetAtlas::getEntry(const SkBitmap* bitmap) const { 79 ssize_t index = mEntries.indexOfKey(bitmap); 80 return index >= 0 ? mEntries.valueAt(index) : NULL; 81} 82 83Texture* AssetAtlas::getEntryTexture(const SkBitmap* bitmap) const { 84 ssize_t index = mEntries.indexOfKey(bitmap); 85 return index >= 0 ? mEntries.valueAt(index)->texture : NULL; 86} 87 88/** 89 * Delegates changes to wrapping and filtering to the base atlas texture 90 * instead of applying the changes to the virtual textures. 91 */ 92struct DelegateTexture: public Texture { 93 DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { } 94 95 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, 96 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 97 mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget); 98 } 99 100 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, 101 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { 102 mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget); 103 } 104 105private: 106 Texture* const mDelegate; 107}; // struct DelegateTexture 108 109/** 110 * TODO: This method does not take the rotation flag into account 111 */ 112void AssetAtlas::createEntries(Caches& caches, int64_t* map, int count) { 113 const float width = float(mTexture->width); 114 const float height = float(mTexture->height); 115 116 for (int i = 0; i < count; ) { 117 SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(map[i++]); 118 // NOTE: We're converting from 64 bit signed values to 32 bit 119 // signed values. This is guaranteed to be safe because the "x" 120 // and "y" coordinate values are guaranteed to be representable 121 // with 32 bits. The array is 64 bits wide so that it can carry 122 // pointers on 64 bit architectures. 123 const int x = static_cast<int>(map[i++]); 124 const int y = static_cast<int>(map[i++]); 125 bool rotated = map[i++] > 0; 126 127 // Bitmaps should never be null, we're just extra paranoid 128 if (!bitmap) continue; 129 130 const UvMapper mapper( 131 x / width, (x + bitmap->width()) / width, 132 y / height, (y + bitmap->height()) / height); 133 134 Texture* texture = new DelegateTexture(caches, mTexture); 135 texture->blend = !bitmap->isOpaque(); 136 texture->width = bitmap->width(); 137 texture->height = bitmap->height(); 138 139 Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this); 140 texture->uvMapper = &entry->uvMapper; 141 142 mEntries.add(entry->bitmap, entry); 143 } 144} 145 146}; // namespace uirenderer 147}; // namespace android 148