[ quesa-Bugs-902922 ] Add draw-context independent drawing API

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Bugs item #902922, was opened at 2004-02-23 19:39
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Dair Grant (grantd)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add draw-context independent drawing API

Initial Comment:
It would be useful to have a draw-context independent API for 
drawing, to act as a portable way to get/set pixels that would work 
with any kind of draw context object.

Draw contexts could implement required get/set pixel methods, 
and optionally get/set scanline or drawrect methods (the root draw 
context object would provide default implementations of these 
methods, which would just work by calling the single-pixel method 
repeatedly).

This would let applications draw directly to draw contexts, and 
would make it possible to write plug-in renderers (e.g., a 
RayTracer) without requiring that they hard-code support for each 
available draw context type in them (at present, every renderer 
must know how to draw to every type of draw context).

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