graphics/g2 0.50nb43 NetBSD

g2 is a simple to use graphics library for 2D graphical applications written in Ansi-C.

This library provides a comprehensive set of functions for simultaneous generation of graphical output on different types of devices. Presently, following devices are currently supported by g2: X11, GIF, PostScript (xfig and Win32 are in development).

One major feature of the g2_library is the concept of virtual devices. An arbitrary number of physical devices (such as GIF, or X11) can be grouped to create a so-called virtual device. Commands sent to such a virtual devices will automatically issued to all attached physical devices. This allows for example simultaneous output to a GIF file and a Postscript file. A virtual device in turn can be attached to another virtual device, allowing to construct trees of devices. Virtual devices can also be useful when using different user-coordinate systems. E.g. one X11 window showing an overview of a graphical output, and a second window showing a zoom of a more detailed area of the graphic. Drawing in both windows is performed by one single command to the virtual device.