Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!dsacg1!dsacg2!nor1675
From: nor1675@dsacg2.UUCP (Michael Figg)
Newsgroups: comp.sys.amiga
Subject: Re: Novice Intuition Graphics Questions
Summary: GetRGB4,LoadRGB4
Keywords: Colormap, Fades
Message-ID: <217@dsacg2.UUCP>
Date: 5 Jul 88 11:32:51 GMT
References: <216@dsacg2.UUCP>
Organization: Defense Logistics Agency Systems Automation Center, Columbus, OH
Lines: 57

In article <216@dsacg2.UUCP>, nor1675@dsacg2.UUCP (Michael Figg) writes:
> What is the preffered way to save workbench/colortable settings before 
> changing them in a program. Is there an easy way to save 1 or 2 pen values
> (entries) and restore them before termination. It looks like GetRGB4 and
> SetRGB4 have conflicting formats. Does the whole colormap need to be saved
> and is always 64bytes? (It is 64 isn't it?)
> 

As Peter says, I probably shouldn't play around with the WB colors but I am
and for no reasonable purpose either. This is what I've tried.

USHORT  colorsave[4];
 
void main()
{
   .                                 /* Open Libraries and Window */
   .
   for( i=0; i<4; i++)
   {
     colorsave[i] = (USHORT)(*(vp->ColorMap->ColorTable[i]));
     printf("%d = %x\n",i,colorsave[i]);
   }

   (void)demo();                    /* play around with colors and other 
					      things*/
   Wait(1<<wnd->UserPort->mp_SigBit);

   LoadRGB4(vp,colorsave,4);

   (void)CloseWindow(wnd);
}

this gave me a black screen when I closed window and zero values in the 
colorsave table(which I assume gave me the black screen).

I also tried 

     colorsave[i] = GetRGB4(vp->ColorMap,i);

instead of

     colorsave[i] = (USHORT)(*(vp->ColorMap->ColorTable[i]));

This did give me some values in the printf for the first two entries but
zero for the second two. It also gave me a lime green background and gray-
blue text and borders where I had started with a slate gray background and
white letters and borders. To me it looks like both of these approaches 
should do the same thing but neither is doing it. As soon as I figure this
out then I will stop playing with the WB colors, I promise. :-)

					 Thanks,
					   
-- 
"Better graphics with crayons"                 Michael Figg
					       DLA Systems Automation Center
					       Columbus, Oh.
					       (614)-238-9036