--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ext/guichan-0.8.1/examples/openglsdl.hpp	Sat Jul 19 11:38:52 2008 +0000
@@ -0,0 +1,133 @@
+/*
+ * Code that sets up an OpenGL application with Guichan using the 
+ * Guichan OpenGL back end and the SDL back end (as OpenGL cannot
+ * load images nor check for user input an additional back end needs
+ * to be used).
+ */
+
+#include <guichan.hpp>
+#include <guichan/opengl.hpp>
+// The openglsdlimageloader.hpp header file needs to be included
+// in order to get the image loader that uses OpenGL and SDL.
+#include <guichan/opengl/openglsdlimageloader.hpp>
+#include <guichan/sdl.hpp>
+
+namespace openglsdl
+{
+    bool running = true;
+    SDL_Surface* screen;
+
+    // All back ends contain objects to make Guichan work on a
+    // specific target. They are a Graphics object to make Guichan 
+    // able to draw itself using OpenGL, an input objec to make 
+    // Guichan able to get user input using SDL and an ImageLoader 
+    // object to make Guichan able to load images using OpenGL and SDL.
+    gcn::OpenGLGraphics* graphics;
+    gcn::SDLInput* input;
+    gcn::OpenGLSDLImageLoader* imageLoader;
+
+    /**
+     * Initialises the OpenGL and SDL application. This function creates the global
+     * Gui object that can be populated by various examples.
+     */
+    void init()
+    {
+        // We simply initialise OpenGL and SDL as we would do with any OpenGL
+        // and SDL application.
+        SDL_Init(SDL_INIT_VIDEO);
+        SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+        screen = SDL_SetVideoMode(640, 480, 32, SDL_HWSURFACE | SDL_OPENGL | SDL_HWACCEL);
+
+        glViewport(0, 0, 640, 480);
+        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+
+        // We want unicode for the SDLInput object to function properly.
+        SDL_EnableUNICODE(1);
+        // We also want to enable key repeat.
+        SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
+
+        // Now it's time to initialise the Guichan OpenGL back end
+        // and the Guichan SDL back end.
+
+        imageLoader = new gcn::OpenGLSDLImageLoader();
+        // The ImageLoader Guichan should use needs to be passed to the Image object
+        // using a static function.
+        gcn::Image::setImageLoader(imageLoader);
+        graphics = new gcn::OpenGLGraphics();
+        // We need to tell the OpenGL Graphics object how big the screen is.
+        graphics->setTargetPlane(640, 480);
+        input = new gcn::SDLInput();
+
+        // Now we create the Gui object to be used with this OpenGL
+        // and SDL application.
+        globals::gui = new gcn::Gui();
+        // The Gui object needs a Graphics to be able to draw itself and an Input
+        // object to be able to check for user input. In this case we provide the
+        // Gui object with OpenGL and SDL implementations of these objects hence 
+        // making Guichan able to utilise OpenGL and SDL.
+        globals::gui->setGraphics(graphics);
+        globals::gui->setInput(input);
+    }
+
+    /**
+     * Halts the OpenGL and SDL application.
+     */
+    void halt()
+    {
+        delete globals::gui;
+
+        delete imageLoader;
+        delete input;
+        delete graphics;
+
+        SDL_Quit();
+    }
+
+    /**
+     * Runs the OpenGL and SDL application.
+     */
+    void run()
+    {
+        // The main loop
+        while(running)
+        {
+            // Check user input
+            SDL_Event event;
+            while(SDL_PollEvent(&event))
+            {
+                if (event.type == SDL_KEYDOWN)
+                {
+                    if (event.key.keysym.sym == SDLK_ESCAPE)
+                    {
+                        running = false;
+                    }
+                    if (event.key.keysym.sym == SDLK_f)
+                    {
+                        if (event.key.keysym.mod & KMOD_CTRL)
+                        {
+                            // Works with X11 only
+                            SDL_WM_ToggleFullScreen(screen);
+                        }
+                    }
+                }
+                else if(event.type == SDL_QUIT)
+                {
+                    running = false;
+                }
+                
+                // After we have manually checked user input with SDL for
+                // any attempt by the user to halt the application we feed
+                // the input to Guichan by pushing the input to the Input
+                // object.
+                input->pushInput(event);
+            }
+            // Now we let the Gui object perform its logic.
+            globals::gui->logic();
+            // Now we let the Gui object draw itself.
+            globals::gui->draw();
+            // Finally we update the screen.
+            SDL_GL_SwapBuffers();
+        }
+    }
+}