Draws a pixmap into viewport with its upper left corner at position posn. type is a symbol, one of 'gif, 'xbm, 'xpm, 'bmp, 'pict or 'unknown, and defaults to 'unknown. If type is 'unknown then the content of the file is examined to determine the type. All formats are supported on all platforms except 'pict which is only supported under MacOS.
The argument color is only used when the pixmap is black and white. In that case, the color is used instead of black in the drawn image.