Re: [cc65] TGI palettes (was: TGI colors revisited)

From: Greg King <>
Date: 2011-05-24 13:00:34
From: "Oliver Schmidt"; on Sun., May 22, 2011; at 05:36 PM -0400
> >> Hm, do we really want to go into color approximation? What is the
> >> metric for similarity? I'd rather go for a simple "Either I have
> >> what you ask for, or I don't". The additional function allocating
> >> colors from RGB values maybe could allow for approximation.
> > OK, how about "In case the given color is unavailable, the driver
> > MAY allocate a similar color, and return its index." That leaves it
> > open to the driver, and will help in cases where approximation is
> > easy -- for example, a monochrome driver that may return black for
> > TGI_COLOR_BLACK and white for all others.
> With "MAY", it makes sense to me too.

But, a program still needs to know _when_ it happens!  Perhaps, an error
code could be set when tgi_alloccolor() approximates (the message might
be "approximate color", "color is approximate", or "color was

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Received on Tue May 24 15:48:31 2011

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