/* X11 symbol definitions */
+#define BLACK_PIXEL BlackPixel(display, screen)
+#define WHITE_PIXEL WhitePixel(display, screen)
+
#define EVENT_BUTTONPRESS ButtonPress
#define EVENT_BUTTONRELEASE ButtonRelease
#define EVENT_MOTIONNOTIFY MotionNotify
inline void X11FreeBitmapPointers(Bitmap *);
inline void X11CopyArea(Bitmap *, Bitmap *, int, int, int, int, int, int, int);
inline void X11FillRectangle(Bitmap *, int, int, int, int, Pixel);
+inline void X11DrawSimpleLine(Bitmap *, int, int, int, int, Pixel);
inline Pixel X11GetPixel(Bitmap *, int, int);
inline Pixel X11GetPixelFromRGB(unsigned int, unsigned int, unsigned int);