[softwarelist] Re: Importing EPSs with TIFF preview (Ovation Pro for RISC OS)

> What I did was take your two EPS files and save from the TIFF
> start marker to the end.

Yes, I don't know why I didn't try that.

> The DOC7 version gave me a good TIFF, the DOC8 gave me a bad
> TIFF - even Adobe Photoshop Elements tells me it is a bad
> TIFF file.

Yes it does. And DPlngScan correctly reports that the verion
number (&002A) is wrong. Photodesk just hangs . . .

> I believe that OP will when loading an EPS file use the
> transloader system to handle the TIFF preview.

Maybe, although the !Help file in the OEPS applet suggests that
it calls ChangeFSI directly:

> > The preview is convereted to a sprite, using ChangeFSI. This
> > means only TIFF previews can be handled. The conversion is
> > done by calling a function in the file
> > !OEPS.Library.!EPSCode;

> > int eps_convert(string & from,int ftype,string & to);

> In other words quite a bit of technology is used on the TIFF,
> the filters for RISC OS and Windows use the same code as
> DPScan. It is not just a small TIFF loader that does not
> understand the MM and II headers.

No, I see that now. And anyway I've just tried a (different)
little-endian ("II") TIFF with DPlngScan and ChangeFSI, and it
loads fine into both of those as well as into Ovation Pro via the
transloader, so I was wrong about little-endian TIFFs 

> Have you managed to load either these TIFF files into any
> program?

No, not now that I have tried saving them separately.

> or get the preview from the EPS to display in any program?

I have nothing else which makes use of the EPS previews.
Programes like Quark XPress used to, but normal practice these
days, on OS X and probably Windows too, seems to be to convert
EPS to PDF (ignoring the preview) then display that using the
application's usual PDF renderer.

So there's not much more that can be done (apart from a second
bug report to Adobe, which I have sent). Of course if Ovation
Pro, on both RISC OS and Windows, used GhostScript to generate a
bitmap proxy instead of relying on a supplied TIFF preview, then
it could import PDF or EPS equally easily, and it would be
possible to choose the resolution and bit depth of the proxy
sprite just as for any other image. That would only leave the
problem of converting PDF to PostScript when printing, for which
GhostScript /isn't/ suitable -- but that's a matter for another
thread . . .

-- 
P. C. Newble
Fenwood, Church Street, Stoke by Nayland, Colchester CO6 4QP, UK
Tel. +44(0)1206 262946; Mob. +44(0)7944 816266; Fax +44(0)870 055 8343
http://www.newble.com/  ·  peter@xxxxxxxxxx

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