/* * This file is part of MXE. See LICENSE.md for licensing information. */ /************************************************* * CEGUI demo program. This creates an OpenGL window * and makes CEGUI draw an "in-game" window into it. ************************************************/ #include <CEGUI/CEGUI.h>#include <CEGUI/RendererModules/OpenGL/GLRenderer.h>#include <GL/freeglut.h> // We’re lazyusing namespace CEGUI; // Prototypesvoid main_loop(); // Main program entry pointint main(int argc, char* argv[]){  // Initialize OpenGL  glutInit(&argc, argv);  glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);  glutInitWindowSize(640, 480);   // Create the default GL context to have CEGUI draw upon  int window_id = glutCreateWindow("Test");   // Initialize CEGUI (will automatically use the default GL context)  OpenGLRenderer& renderer = OpenGLRenderer::bootstrapSystem();   // Tell CEGUI where to find its resources  DefaultResourceProvider* p_provider = static_cast<DefaultResourceProvider*>(System::getSingleton().getResourceProvider());  p_provider->setResourceGroupDirectory("schemes", "../share/cegui-0/schemes");  p_provider->setResourceGroupDirectory("imagesets", "../share/cegui-0/imagesets");  p_provider->setResourceGroupDirectory("fonts", "../share/cegui-0/fonts");  p_provider->setResourceGroupDirectory("layouts", "../share/cegui-0/layouts");  p_provider->setResourceGroupDirectory("looknfeels", "../share/cegui-0/looknfeel");  p_provider->setResourceGroupDirectory("lua_scripts", "../share/cegui-0/lua_scripts");  p_provider->setResourceGroupDirectory("schemas", "../share/cegui-0/xml_schemas");  p_provider->setResourceGroupDirectory("animations", "../share/cegui-0/animations");   // Map the resource request to our provider  Scheme::setDefaultResourceGroup("schemes");  ImageManager::setImagesetDefaultResourceGroup("imagesets");  Font::setDefaultResourceGroup("fonts");  WindowManager::setDefaultResourceGroup("layouts");  WidgetLookManager::setDefaultResourceGroup("looknfeels");  ScriptModule::setDefaultResourceGroup("lua_scripts");  AnimationManager::setDefaultResourceGroup("animations");  XMLParser* p_parser = System::getSingleton().getXMLParser();  // For the Xerces parser, set the XML schemas resource  if (p_parser->isPropertyPresent("SchemaDefaultResourceGroup"))    p_parser->setProperty("SchemaDefaultResourceGroup", "schemas");   // Configure the default window layouting  SchemeManager::getSingleton().createFromFile("TaharezLook.scheme");   // Mouse cursor  CEGUI::GUIContext& gui_context = CEGUI::System::getSingleton().getDefaultGUIContext();  gui_context.getMouseCursor().setDefaultImage("TaharezLook/MouseArrow");   // Create the hypothetical CEGUI root window  Window* p_root_window = WindowManager::getSingleton().createWindow("DefaultWindow", "root");  gui_context.setRootWindow(p_root_window);   // Create an actual framed window we can look onto  FrameWindow* p_frame_window = static_cast<FrameWindow*>(WindowManager::getSingleton().createWindow("TaharezLook/FrameWindow", "testWindow"));  p_root_window->addChild(p_frame_window);  p_frame_window->setPosition(UVector2(UDim(0.25f, 0), UDim(0.25f, 0)));  p_frame_window->setSize(USize(UDim(0.5f, 0), UDim(0.5f, 0)));  p_frame_window->setText("Hello World!");   // Enter main loop  main_loop();   // Clean up OpenGL  glutDestroyWindow(window_id);} /* Main loop for processing events, etc. For a real application, * you definitely want to replace while(true) with checking a * proper termination condition. Note all drawing operations take * place on an invisible auxiliary buffer until you call glutSwapBuffers(), * which paints the entire auxiliary buffer onto the screen. */void main_loop(){  while(true) {    glutMainLoopEvent(); // Process events    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear the window background to a single color    glFlush();    CEGUI::System::getSingleton().renderAllGUIContexts(); // Tell CEGUI to render all its stuff    glutSwapBuffers(); // Put the auxiliary rendering buffer onto the screen and make the screen the new auxiliary buffer.  }}