Chapter 25  The graphics library

This library is implemented under the X11 windows system. Programs that use the graphics library must be linked as follows:

        ocamlc other options graphics.cma other files

For interactive use of the graphics library, do:

        ocamlmktop -o mytop graphics.cma
        ./mytop

or (if dynamic linking of C libraries is supported on your platform), start ocaml and type #load "graphics.cma";;.

Here are the graphics mode specifications supported by open_graph on the X11 implementation of this library: the argument to open_graph has the format "display-name geometry", where display-name is the name of the X-windows display to connect to, and geometry is a standard X-windows geometry specification. The two components are separated by a space. Either can be omitted, or both. Examples:

open_graph "foo:0"

connects to the display foo:0 and creates a window with the default geometry

open_graph "foo:0 300x100+50-0"

connects to the display foo:0 and creates a window 300 pixels wide by 100 pixels tall, at location (50,0)

open_graph " 300x100+50-0"

connects to the default display and creates a window 300 pixels wide by 100 pixels tall, at location (50,0)

open_graph ""

connects to the default display and creates a window with the default geometry.

This library is available both for standalone compiled programs and under the toplevel application ocamlwin.exe. For the latter, this library must be loaded in-core by typing

        #load "graphics.cma";;