1 /* 2 * Copyright 2017 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 #ifndef ANDROID_UI_GRAPHICS_ENV_H 18 #define ANDROID_UI_GRAPHICS_ENV_H 1 19 20 #include <string> 21 22 struct android_namespace_t; 23 24 namespace android { 25 26 class GraphicsEnv { 27 public: 28 static GraphicsEnv& getInstance(); 29 30 // Set a search path for loading graphics drivers. The path is a list of 31 // directories separated by ':'. A directory can be contained in a zip file 32 // (drivers must be stored uncompressed and page aligned); such elements 33 // in the search path must have a '!' after the zip filename, e.g. 34 // /data/app/com.example.driver/base.apk!/lib/arm64-v8a 35 void setDriverPath(const std::string path); 36 android_namespace_t* getDriverNamespace(); 37 38 void setLayerPaths(android_namespace_t* appNamespace, const std::string layerPaths); 39 android_namespace_t* getAppNamespace(); 40 const std::string getLayerPaths(); 41 42 void setDebugLayers(const std::string layers); 43 const std::string getDebugLayers(); 44 45 private: 46 GraphicsEnv() = default; 47 std::string mDriverPath; 48 std::string mDebugLayers; 49 std::string mLayerPaths; 50 android_namespace_t* mDriverNamespace = nullptr; 51 android_namespace_t* mAppNamespace = nullptr; 52 }; 53 54 } // namespace android 55 56 /* FIXME 57 * Export an un-mangled function that just does 58 * return android::GraphicsEnv::getInstance().getDriverNamespace(); 59 * This allows libEGL to get the function pointer via dlsym, since it can't 60 * directly link against libgui. In a future release, we'll fix this so that 61 * libgui does not depend on graphics API libraries, and libEGL can link 62 * against it. The current dependencies from libgui -> libEGL are: 63 * - the GLConsumer class, which should be moved to its own library 64 * - the EGLsyncKHR synchronization in BufferQueue, which is deprecated and 65 * will be removed soon. 66 */ 67 extern "C" android_namespace_t* android_getDriverNamespace(); 68 69 #endif // ANDROID_UI_GRAPHICS_ENV_H 70
