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/**
 * This function is platform independant.
 * The main method of the specific platform calls this function
 * on startup and passes the command line arguments. If there are no
 * command line arguments, you can pass 0 for argc und NULL for argv.
 * Then the script "script.lua" is loaded, otherwise the script from
 * the file in argv[1] (argv[0] is the program name itself, for debug output).
 * This function returns on script exit.
 */
extern int luaplayerMain(int argc, char *argv[]);

/**
 * Is implemented for specific platforms.
 * Initializes the GUI, e.g. creates a window or switches to graphics
 * mode. And initializes the OpenGL subsystem. Subsequent OpenGL calls
 * will be made after this function was called, from the same thread.
 * The OpenGL system must be initialized in a way that provides 2
 * buffers: One back buffer and one front buffer. The front buffer
 * is visible to the screen and the back buffer is the one on which
 * OpenGL functions are drawing. With flipFrame the front buffer
 * and back buffer are switched.
 */
extern void initGui();

/**
 * Is implemented for specific platforms.
 * Returns the width in pixel of the drawable area for the OpenGL functions.
 */
extern int getFrameWidth();

/**
 * Is implemented for specific platforms.
 * Returns the width in pixel of the drawable area for the OpenGL functions.
 */
extern int getFrameHeight();

/**
 * Is implemented for specific platforms.
 * Waits for VSync and flips the front and back buffer with VSync.
 */
extern void flipFrame();

/**
 * Is implemented for specific platforms.
 * Restores the graphics mode before calling initGui, e.g. deleting
 * a window or restoring the old text or graphics mode. This function
 * is called before luaplayerMain exits.
 */
extern void releaseGui();