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Date Posted: 08:42:33 11/13/00 Mon
Author: Michel
Subject: Re: Gray Scale buggy
In reply to: Paul Mead 's message, "Re: Gray Scale buggy" on 16:21:08 11/10/00 Fri



Hi Paul,

I'm not sure about this. We will need to isolate what is the difference between your program and the demo program. Are you performing a transformation before saving?

JPEG does not support 256 color images, but does support gray scale images. If you have a 256 color image and would like to save it as JPEG, you first need to convert to ifTrueColor.

Best regards,

Michel


> Hi Michel
>
> The problem I am having with pink Tiffs happens every
> time
> I repeat the save procedure in my software. The exact
> amount of pink may vary. This does not appear?? to
> happen
> with your Example Program.
>
> File EnTifGr.pas
>
> Line 1009
> Palette.palNumEntries := GetPaletteEntries(
> Dib.PaletteHandle,
> 0,
> 256,
> Palette.palPalEntry
> );
>
> On entry Palette is full of junk data
> Dib Palette shows valid Gray Scale Data
>
> On exit Palette contains a copy of the Dib Palette
> except some not all peGreen values are zero, other
> values appear okay.
>
> Since GetPaletteEntries is a Windows Function it
> should be bug free.
> I assume some memory is not locked or initialized.
>
> The reason I can't save with JPEG compression is
> because it is ifColor256, we have the full working
> version.
>
> Paul

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