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Re: PICT preview in EPS file?

On Wednesday, July 16, 2003, at 10:36 AM, john mead wrote:
I'm attempting to write an EPS file to be used in DPT
applications such as QuarkXpress. It seems most DTP
applications use a low resolution bitmap image as a
proxy for on-screen display. This low res bitmap is
(or was?) stored in the resource fork of the EPS file
as a PICT bitmap.

I can produce an eps file with something like this:
data = [self dataWithEPSInsideRect: myRectangle];
[data writeToFile:myFile atomically:YES];

...however the resulting EPS does not contain a
preview, so QuarkXpress just displays a grey rectangle
instead of the image resulting in cranky designers.

Can anyone help me figure out how to get a preview
into an EPS file?

Hi John,

First, you'll want to refer to the EPS spec from Adobe:
http://partners.adobe.com/asn/developer/pdfs/tn/5002.EPSF_Spec.pdf

It is much easier to build a TIFF in Cocoa than to build a PICT, so a good way to approach this is to make a TIFF preview, then prepend Adobe's DOS EPS Binary File Header to the EPS data and write that. I haven't specifically tried this with Quark, but I'd expect that if it accepts a Mac-style EPS (with PICT preview) it can also handle a DOS-style EPS (with TIFF or Metafile preview).

Hope this helps,
- Greg
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 >PICT preview in EPS file? (From: john mead <email@hidden>)



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