Editing New Cross-Platform 2D Framebuffer

==Cross Platform Framebuffer==

BRL-CAD displays its raytracing output as it is generated by using a framebuffer. Currently BRL-CAD has specific framebuffers for X11 Opengl (ogl), Windows OpenGL (wgl), and raw X11 (X), in addition to a  variety of more special purpose and experimental framebuffers.  A single, high performance, cross platform framebuffer is of interest to BRL-CAD. 

This task, could utilize a cross-platform application framework such as Qt or OGRE or it could utilize some other approach.  In addition to Qt or OGRE, another candidate could be the pxCore library ( http://code.google.com/p/pxcore/ ) or GLUT.

Whatever the solution, it would ideally be implemented in such a way that it can be embedded into a Tk window and be a "drop in replacement" for existing stand-alone and embedded graphical framebuffers on multiple platforms.  Hardware acceleration should not be required, but leveraging it automatically when it's available would be great.

# Review current framebuffer code and related code (in particular, isst) to identify features needed for a framebuffer
# Identify approach (Qt, OGRE, pxCore, custom code, etc)
# Implement working code, including:
#*per-scan-line drawing - display update should not have to wait for a completed raytrace
#*good drawing performance - a fast raytrace should display quickly, not have to wait for framebuffer drawing to catch up
#*keyboard and mouse input (there is some)
# Can start development with reading in lines from a pix file instead of hooking in the raytracer in order to optimize display performance, but should progress to using the raytracer.
# Testing (ideally cross platform) - load a .g model, raytrace it and display the results.  Ideally integrated into MGED.

A good proposal for this task will need to spell out a fair number of specifics and should do some homework - "research and implement framebuffer code" would be a weak submission.  The X11 framebuffer (if_X24.c) would be good code to review when developing a proposal for this task.

Requirements:
*Familiarity with C and C++ 
*(optional) Familiarity with cross platform graphical drawing APIs and issues

References:
* src/libfb
* include/fb.h
* include/fbio.h
* include/fbserv_obj.h

Difficulty: low