Message-ID: <19971025031927.22940.qmail@hotmail.com>
From: "John Patton" <gimli21 AT hotmail DOT com>
To: djgpp AT delorie DOT com
Subject: Re: Fade routine
Content-Type: text/plain
Date: Fri, 24 Oct 1997 20:19:27 PDT
Precedence: bulk

>Vic schrieb:
>> Michal Mertl wrote:
>> > On Wed, 15 Oct 1997, Simon Churchill wrote:
>> > > Andreas Bj=F6rk wrote:
>> > > Have You remembered that the palette is only 18bit colour not 
24bit
>> > >
>> > > ie rgb vals go from 0 - 0x63 and not 0 - 0xff  ???????
>> > >
>> > Not to be pedantic but it's 0 - 63 (0x3f)
>> Plus the palette is 8 bit. I never heard of 18 bit...
>
>Never heard? I assume you haven't tried graphics programming yet...
>Picture data is 8 bit per pixel because it's a reference to the 256 DAC 
p=
>alette
>registers which are 18 bit wide (6 bit for red/green/blue values, which 
l=
>eads to
>2^18 =3D 262144 different colors, but only 256 of them are displayable 
at=
> the same
>time) HiColor/TrueColor modes don't have a palette which makes fading a 
h=
>ard
>task (I've heard something about 'color ramp' but I don't know what 
this =
>really
>is...)=20

I agree.  I just received a short lecture on it from Shawn Hargreaves, 
and George just about stated verbatim what Shawn said.  I had a decent 
idea about it, and it was cleared up thanks to Shawn.  Can become 
confusing, though...

-Johnny P.

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