/* This is the official place to get screen height
   and width from
*/
extern unsigned long g_width, g_height;

/* Initialise Graphics library
   - offscreen points to width * height * 4 bytes of
     offscreen memory
   - width, height give the dimensions of offscreen
*/
void Gfx_init( void* offscreen, int width, int height );

/* Deinitialise Graphics library
*/
void Gfx_destroy( void );

/* Clear offscreen bitmap
*/
void Gfx_clear( void );

/* Draw one ball to offscreen
   - x,y position of ball
   - radius size of ball
   - r,g,b color of ball [0..255]
*/
void Gfx_kuller( int x, int y, int radius, unsigned long r, unsigned long g, unsigned long b );