On Fri, Jun 16, 2006 at 03:03:25PM +0100, Keith Marshall wrote:
> Thanks for suggesting this potential enhancement. I think, however, that
> I prefer `--emit-ps', or `--emit-postscript', (one or the other, but not
> both, otherwise abbreviation becomes unwieldy), to your choice of
> `--leave-postscript-output', for the name of the new option.
I agree.
> One problem I do see, with your patch, is that it always assumes that
> `--no-toc-relocation' is the desired behaviour; this may not always be
> the case. Better to define `PDFWRITE="$CAT"', rather than its normal
> `PDFWRITE="$GS ..." definition, if `--emit-ps' is specified, I think.
Well, the patch was for my personal use, and since gpresent generates
TOC for the slides I never really needed that feature.
However, I agree that in general case it should be considered.
The new patch and the patch to the man page are attached.
One issue I had is that your sed script erased completely valid EPS
files (created by ImageMagick convert program from JPG and PNG) embedded
in my presentations. Thus I decided to make it an empty script for
--emit-ps option. If you ever fix it, so that it doesn't remove images,
but rather blank pages only, it could be used without if-else-fi.
Till then, I think it is safer to assume that a user of --emit-ps wants
an unchanged PostScript output.
I'd fix that sed script myself if I had a faintest idea how to
reliably distinguish a valid embedded EPS from a blank page.
> I also note that you've added the `-dSAFER' option to the `gs' invocation.
> I'd prefer not to do that, as not all users may want it. Better to add a
> `--gs-options="option list"' option to pdfroff, so that users can make
> the choice, IMHO. (This is something which was discussed before, but I
> simply haven't found the time to implement it).
No need. I call it from Makefile as
env GS_OPTIONS="-dSAFER" pdfroff ...
Ghostscript respects GS_OPTIONS environment variable.
Best regards,
Zvezdan Petkovic
--- pdfroff.orig Sat May 27 21:52:40 2006
+++ pdfroff Fri Jun 16 21:38:24 2006
@@ -145,6 +145,7 @@
help reference-dictionary no-reference-dictionary
stylesheet pdf-output no-pdf-output
version report-progress no-toc-relocation
+ emit-ps
"
# Parse the command line, to identify 'pdfroff' specific options.
# Collect all other parameters into new argument and file lists,
@@ -230,6 +231,10 @@
normally required to position the table of contents at
the
start of a PDF document.
+ --emit-ps
+ Emit PostScript output instead of PDF.
+ Useful for postprocessors such as gpresent.
+
ETX
exit 0
;;
@@ -266,6 +271,10 @@
--no-toc-relocation)
TC_DATA="" TOC_FORMAT="" BODY_FORMAT=""
;;
+
+ --emit-ps)
+ EMIT_PS="YES"
+ ;;
#
# any other non-null match must have matched more than one defined
case,
# so report the ambiguity, and bail out.
@@ -549,22 +558,34 @@
# PostScript intermediate files into a single PDF output file.
#
$SAY >&2 $n "Writing PDF output ..$c"
- PDFWRITE="$GS -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite"
+ if test -n "$EMIT_PS"
+ then
+ if test -n "$PDF_OUTPUT"
+ then
+ $SAY >&2 $n ".\nWARNING: --pdf-output is ignored with --emit-ps ..$c"
+ fi
+ PDFWRITE="$CAT"
+ ERASE_BLANK_PAGES_SCRIPT=''
+ else
+ PDFWRITE="$GS -dQUIET -dBATCH -dNOPAUSE -sDEVICE=pdfwrite
-sOutputFile=${PDF_OUTPUT-'-'}"
#
# (This 'sed' script is a hack, to eliminate redundant blank pages).
#
- $SED '
- :again
- /%%EndPageSetup/b finish
- /%%Page:/{
- N
- b again
- }
- b
- :finish
- N
- /^%%Page:.*0 *Cg *EP/d
- ' $TC_DATA $BD_DATA | $PDFWRITE -sOutputFile=${PDF_OUTPUT-"-"} $CS_DATA -
+ ERASE_BLANK_PAGES_SCRIPT='
+ :again
+ /%%EndPageSetup/b finish
+ /%%Page:/{
+ N
+ b again
+ }
+ b
+ :finish
+ N
+ /^%%Page:.*0 *Cg *EP/d
+ '
+ fi
+
+ $SED "$ERASE_BLANK_PAGES_SCRIPT" $TC_DATA $BD_DATA | $PDFWRITE $CS_DATA -
$SAY >&2 ". done"
#
#
------------------------------------------------------------------------------
--- pdfroff.1.orig Sat May 27 21:52:40 2006
+++ pdfroff.1 Fri Jun 16 18:49:57 2006
@@ -96,6 +96,7 @@
.opta T dev
.opta w name
.opta W name
+.opt -emit-ps
.opt -no-toc-relocation
.opte -stylesheet name
.optx -pdf-output name
@@ -284,6 +285,15 @@
.B pdfroff
to display a summary of the its usage syntax, and supported options,
and then exit.
+.TP
+.B \-\-emit-ps
+Instructs
+.B pdfroff
+to emit PostScript output instead of PDF.
+This option is useful when pdfroff is used together with other groff
+postprocessors, such as
+.IR gpresent ,
+which expect a PostScript input.
.TP
.B \-\-no\-pdf\-output
May be used with the
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