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Re: [vox-tech] Success with fltk and SDL_image
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Re: [vox-tech] Success with fltk and SDL_image



On Tue, May 11, 2004 at 05:26:26PM -0700, Bill Kendrick wrote:
> On Tue, May 11, 2004 at 05:11:25PM -0700, Jan W wrote:
> > Hi all:
> > 
> > Just a question:
> > 
> > Has anyone used SDL_image to do scaling and rotation?  If so, is there anything
> > that I could use to do basic image manipulations?  I am looking for code
> > examples/basic theories so that I can start off down a (more or less)
> > reasonable path...
> 
> SDL_image itself doesn't do scaling and rotation.  Just loading. :^)
> 

<snip>

> 90-degree rotation is pretty trivial.  When you start doing zoom-in our -out,
> it gets trickier, but it really ends up being only as complicated as you make
> it (e.g., do you do interpolation, averaging, or just skip pixels?)

Other than 90-degree rotation just takes a little trig. But pixel loss
comes into play unless you're doing an antialiasing-type thing.

-- 
Micah J. Cowan
micah@cowan.name
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