[gs-devel] rotating pages

[Ken Sharp]

Hi Klaus,

At 20:04 17/02/2009 +0100, Klaus Darilion wrote:

>landscape format. The problem is, that fax only supports portrait 
>(landscape can be shrunk to avoid clipping).

[snip]


>So what we need would be an option for ghostscript to rotate all pages to 
>portrait - regardless of the original orientation of /Rotation values.
>
>Thus, is this possible? Is there such an option?

As such, no. However....

Ghostscript is a PostScript device, and PostScript is a programming 
language, you can alter the behaviour of the interpreter by writing 
PostScript programs. In particular you can redefine the behaviour of 
setpagedevice.

In one example you could store the requested page size whenever it changes, 
and write a custom /BeginPage procedure which would rotate the page if it 
is landscape (or simply always rotate the page if required, but this could 
have side effects, multiple definitions of the page size would result in 
multiple rotations...).


>Further, I found some examples using -dAutoRotate= but I could not a 
>manual which describes the meaning of these token and the possible values. 
>Where can I find it?

The auto rotate feature is described in the ps2pdf documentation 
(gs/doc/ps2pdf.htm) but this won't do what you require. A closer fit is 
described in ps2ps2.htm (gs/doc/ps2ps2.htm), Section 6 'Controlling the 
printer behavious', especially the FitPages switch.

To use either of these, however, would be a 2 pass process; first convert 
the PDF to either a new PDF or a PostScript file, then render the new file 
and send it to the fax device.



                 Ken