Re: [GM-help] 16 bit grayscale PSD bug

[Alex T. <al...@ac...>]

On Sun, 15 Nov 2009 12:03:37 -0800, Alex Teslik wrote
> On Sat, 14 Nov 2009 16:58:48 -0600 (CST), Bob Friesenhahn wrote
> > On Sat, 14 Nov 2009, Alex Teslik wrote:
> > 
> > >    Just a quick bug report regarding the conversion of 16 bit 
> > > grayscale PSD files. It seems GM cannot understand them, or is 
> > > getting confused. Converting to JPG, the result looks like static.
> > 
> > Thanks for the report.  Current GraphicsMagick refuses to open the 
> > file rather than returning a junk image.
> > 
> > PSD is a particularly challenging and poorly-documented format that 
> > few applications (other than from Adobe) will open properly.
> >
> 
> Hi Bob,
> 
>    Much appreciated. The error code will at least help during automation.
> 
>    Not pushing, but just to provide info for the coder lucky enough to come along with the 
> time, knowledge, and itch to scratch...
> 
>    The PSD spec from Adobe is here:
> 
> http://libpsd.graphest.com/files/Photoshop%20File%20Formats.pdf
> 
> Page 47 describes the composite image that is saved in every PSD file.
> 
> Gimp implements the PSD format here (its reads my 16 bit file correctly):
> 
> http://git.gnome.org/cgit/gimp/tree/plug-ins/file-psd
> 
> There is also libpsd, but I don't know if that works since I can't find a program that 
> uses it:
> 
> http://libpsd.graphest.com
> 
>     If I knew C I could have been that lucky guy :(
> 
> Thanks,
> Alex

Hello,

    I found that ImageMagick 6.5.7-10 converts this 16bit PSD with no problem. Not sure if there is
usable code there that could be ported into GM. If I had any C skills I would make the patch myself.
:/ In the meantime I'll be able to use that.

Thanks,
Alex