Console Graphics

The following routines let you display information on a console screen.

For "proper graphics" you need to use a GUI library such as xpGUI, which is included in the standard distribution.

None of these routines are supported by pwa/p2js, apart from a few that slipped through in a moment of weakness/madness (clear_screen, text_color, and bk_color). Legacy code which uses these routines tends to "busy loop" which is wholly inappropriate for a browser and must be event-driven instead - let me know if you find any such code that you need help converting to the latter.

allow_break	allow control-c/control-Break to terminate your program or not
check_break	check if user has pressed control-c or control-Break
clear_screen	clear the screen
position	set cursor line and column
get_position	return cursor line and column
video_config	return parameters of current mode
scroll	scroll text up or down
wrap	control line wrap at right edge of screen
text_color	set foreground text color
bk_color	set background color
read_bitmap	read a bitmap (.bmp) file and return a palette and a 2-d sequence of pixels
save_bitmap	create a bitmap (.bmp) file, given a palette and a 2-d sequence of pixels
cursor	select cursor shape
text_rows	set number of lines on text screen
get_screen_char	get one character from the screen
put_screen_char	put one or more characters on the screen
save_text_image	save a rectangular region from a text screen
display_text_image	display an image on the text screen
isatty	Check whether stdin/stdout/stderr have been redirected.
free_console	delete the console text window