Re: XProc-based rasterizer

Norm, this will be impressive! Looking forward to it.

The only thing I might add (having been looking) is that FOP also has, or
used to have, an -at output that would present an Area Tree. This comes in
XML, I assume (although I have not used this powerful feature).

Regards, Wendell


On Sat, Mar 8, 2025 at 4:41 AM Norm Tovey-Walsh <ndw@nwalsh.com> wrote:

> Wendell Piez <wapiez@wendellpiez.com> writes:
> > According to
> https://spec.xproc.org/master/head/paged-media/diff.html#c.xsl-formatter
> it appears my processor would have to support an "image/png" content type
> on the p:xsl-formatter step.
>
> I hadn’t worked out what media types FOP supports correctly. The next
> release of XML Calabash will add support for
>
>   image/png
>   image/tiff
>   application/X-fop-areatrea
>   application/vnd.hp-PCL
>
> in addition to the currently supported content types:
>
>   application/pdf
>   application/postscript
>   application/x-afp
>   application/rtf
>   text/plain
>
> Conspicuous by its absence is image/svg+xml. Unfortunately, that’s
> currently in the FOP “sandbox”, not in the general release.
>
> I’ll add it to the list of media types that the step supports, so if you
> want to build your own version of FOP, enable the sandbox formats, and try
> it out, you can.
>
> > The 'parameters' option also offers nothing, or nothing obvious. While
> FOP provides runtime switches, in other words, it is not altogether clear
> how (in this case) it would or should be configured to do its thing.
>
> The XML Calabash configuration parameters for FOP are documented here:
>
>
> https://docs.xmlcalabash.com/reference/current/p-xsl-formatter.html#xsl-apachefop
>
> So, for example, this:
>
>   <p:xsl-formatter content-type="image/png"
>                    parameters="map {'TargetResolution': 300 }">
>     …
>   </p:xsl-formatter>
>
> will produce a 300dpi image/png rendering.
>
>                                         Be seeing you,
>                                           norm
>
> --
> Norm Tovey-Walsh <ndw@nwalsh.com>
> https://norm.tovey-walsh.com/
>
> > From a programmer's point of view, the user is a peripheral that types
> > when you issue a read request.--P. Williams
>


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