text: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include <GL/gl.h>
  #include <dlfcn.h>
  #include <string.h>
  
  namespace bluegl {
  
  struct Driver {
      void* (*glXGetProcAddress)(const GLubyte*);
      void* library;
  } g_driver = {nullptr, nullptr};
  
  bool initBinder() {
      const char* library_name = "libGL.so.1";
      g_driver.library = dlopen(library_name, RTLD_GLOBAL | RTLD_NOW);
  
      if (!g_driver.library) {
          return false;
      }
  
      g_driver.glXGetProcAddress = (void *(*)(const GLubyte *))
              dlsym(g_driver.library, "glXGetProcAddressARB");
  
      return g_driver.glXGetProcAddress;
  }
  
  void* loadFunction(const char* name) {
      return (void*) g_driver.glXGetProcAddress((const GLubyte*) name);
  }
  
  void shutdownBinder() {
      dlclose(g_driver.library);
      memset(&g_driver, 0, sizeof(g_driver));
  }
  
  } // namespace bluegl
  