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Date Posted: 07:35:18 09/13/04 Mon
Author: Michel
Subject: Re: Tiff with Palette Problem
In reply to: Mitch 's message, "Re: Tiff with Palette Problem" on 12:41:57 09/07/04 Tue

Hi Mitch,

Please email me the file. I'll have a look at the routine.

Best regards,


>>Tracing through the LoadFromFile code I found that the
>>CheckColorMap routine used in GetTifPalette was
>>mistakenly returning a 16 bit space. When I forced it
>>to return 8 the Tif loaded and drew correctly.
>>I'll look into it a bit further when I have the time.
>This is the function where the problem is. It seems to
>me that if the Red/Green/Blue Colormaps are accessed
>as WORD's there's a high probability that the values
>will exceed 256 and be regsitered as 16 bit entries.
>Is there a better way to do this?
>function CheckColorMap( const Count : Integer;
> var RedColorMap :
> var GreenColorMap :
> var BlueColorMap :
>TWordArray ) : LongInt;
> Index : Integer;
> for Index := 0 to (Count-1) do
> begin
> if (RedColorMap[Index] >= 256) or
> (GreenColorMap[Index] >= 256) or
> (BlueColorMap[Index] >= 256) then
> begin
> Result := 16;
> Exit;
> end;
> end;
> Result := 8; { assume 8 bit color map }

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