From freedesktop-create Wed Oct 13 16:13:25 2010 From: Cyrille Berger Skott Date: Wed, 13 Oct 2010 16:13:25 +0000 To: freedesktop-create Subject: Re: [CREATE] How open/free do you consider PSD file format? Message-Id: <201010131813.26164.cberger () cberger ! net> X-MARC-Message: https://marc.info/?l=freedesktop-create&m=128698699427775 MIME-Version: 1 Content-Type: multipart/mixed; boundary="--===============0553820858==" --===============0553820858== Content-Type: multipart/alternative; boundary="Boundary-01=_mqdtMOeOl5ZzllB" Content-Transfer-Encoding: 7bit --Boundary-01=_mqdtMOeOl5ZzllB Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit On Wednesday 13 October 2010, Olivier BERTEN wrote: > I'm trying to write a Photoshop PAT codec for SwatchBooker but I'm > stuck between my will to preserve as much information as possible, and > the lack (or my lack of knowledge) of open file formats that could > preserve all characteristics of these patterns... Some features like > "multichannel" (multi-ink) or CMYK+alpha aren't available in any other > format I know... Patterns like these are rather unusual, to say the > less... but I'd like to support that format as completely as possible... What about making/extending an open format ? You might be able to use .exr for that purpose (while not really open, the spec is at least freely available with a reference implementation). > So the best solution, in term of content preservation, would be to save > these patterns as PSD but I'm not really comfortable with including that > possibility in my format. In the other hand, pretty much all free > graphic applications are able to deal with that format... PSD is everything but open/free. It is even so close that you have to sign a NDA to get access to the spec. Unless you stick to the outdated PS6. -- Cyrille Berger Skott --Boundary-01=_mqdtMOeOl5ZzllB Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: 7bit

On Wednesday 13 October 2010, Olivier BERTEN wrote:

> I'm trying to write a Photoshop PAT codec for SwatchBooker but I'm

> stuck between my will to preserve as much information as possible, and

> the lack (or my lack of knowledge) of open file formats that could

> preserve all characteristics of these patterns... Some features like

> "multichannel" (multi-ink) or CMYK+alpha aren't available in any other

> format I know... Patterns like these are rather unusual, to say the

> less... but I'd like to support that format as completely as possible...

What about making/extending an open format ? You might be able to use .exr for that purpose (while not really open, the spec is at least freely available with a reference implementation).

> So the best solution, in term of content preservation, would be to save

> these patterns as PSD but I'm not really comfortable with including that

> possibility in my format. In the other hand, pretty much all free

> graphic applications are able to deal with that format...

PSD is everything but open/free. It is even so close that you have to sign a NDA to get access to the spec. Unless you stick to the outdated PS6.

--

Cyrille Berger Skott

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