Re: [PATCH] option to prevent EPS backend from creating .tex/.texi/.count files

[Alexander Kobel]

Werner LEMBERG wrote:
> Nice idea.  While you are at it, please investigate why there are
> still clipping problems during the EPS->PNG conversion. [...]
>
> As a possible solution, I can imagine that we add an intermediate step
> to convert the fonts in an EPS file into PS paths, for example, by
> using the `epswrite' device (as demonstrated in the `eps2eps' script
> which comes with ghostscript).  This should assure that the bboxes are
> exact.

Hi,

some time ago I tried to handle this problem with a little script. 
(Makefile attached.) However, I only dealt with PDF->PDF fixing.

In short: I couldn't quite manage to get good results with a 
GhostScript-only version, other than tweaking the BoundingBox entries in 
an intermediate EPS file for myself, using the GS -sDEVICE=bbox output.
Everything I tried with nothing but GS scripts either did not give the 
bboxes as exact as I wanted them, or actually rasterized the file.

Thus I decided to use pdftops from the libpoppler utilities. Which may 
be a problem for Windows, but perhaps it's not needed for EPS->x conversion.

Perhaps it will be useful as a template or give some ideas, but it 
certainly is not thoroughly tested. I have no idea what happens for 
multipage input files, by the way, but this problem won't come up for 
EPS->EPS conversion, I guess.


HTH,
Alexander

BASENAME=frieden
RESOLUTION=600
GS=gs -q -dNOPAUSE -dBATCH

.PHONY: all clean

all:    $(BASENAME).pdf \
        $(BASENAME)-trimmed.pdf \
        $(BASENAME)-trimmed.png \
        $(BASENAME)-trimmed-no-bg.png

%-trimmed.pdf:  %.pdf
#       $(GS) -sDEVICE=pswrite -sOutputFile=$*-fixed.ps $<;
#       $(GS) -sDEVICE=epswrite -sOutputFile=$*-fixed.eps $*-fixed.ps;
#       head -n 1 $*-fixed.eps > $*-trimmed.eps;
#       echo `$(GS) -sDEVICE=bbox $*-fixed.eps 2>&1` > $*.bbox;
#       sed -e 's/ %%HiResBoundingBox/\n%%HiResBoundingBox/' < $*.bbox >> 
$*-trimmed.eps;
#       tail -n +4 $*-fixed.eps >> $*-trimmed.eps;
#       epstopdf --hires $*-trimmed.eps;
#       rm $*-fixed.ps $*-fixed.eps $*.bbox;
        cp -f $< $@;
        pdftops $@;
        rm -f $*-trimmed.eps;
        ps2eps -l $*-trimmed.ps;
        epstopdf $*-trimmed.eps;
        rm -f $*-trimmed.ps;

%.pdf: %.ly
        lilypond $<;

#%-trimmed.png: %.png
#       convert -trim $< +repage $@;
%-trimmed.png:  %-trimmed.pdf
        convert -density $(RESOLUTION)x$(RESOLUTION) -units PixelsPerInch 
-colorspace Gray -depth 8 $< $@;

%-trimmed-no-bg.png:    %-trimmed.png
        convert -channel R $< -channel A -size 1x256 gradient:black-none -clut 
$@;

%.png:  %.ly
        lilypond -dresolution=$(RESOLUTION) --png $<;

clean: $(BASENAME).clean

%.clean:
        rm -f $*-fixed.ps $*-fixed.eps $*.bbox;
        rm -f $*.ps $*.pdf $*.png $*-trimmed.eps $*-trimmed.pdf $*-trimmed.png 
$*-trimmed-no-bg.png $*.midi;