Using a \pagereference in a displayed formula slightly changes the
horizontal spacing. The shift is small, roughly the thickness of an
integral sign. I don't know whether that's considered a bug.
Here is the test file. The control test file is the same but without
the \pagereference line.
\starttext
\startformula
\pagereference[one]%
\int
\stopformula
\stoptext
I noticed the problem on my laptop (Debian, TeXLive 2007, ConTeXt
2008.10.31 13:58) and on the live ConTeXt just now. I found the
deviation using the pdf-compare.sh script included below. Run it as
follows:
pdf-compare.sh file1.pdf file2.pdf
It displays an image with light gray where the pages are pixel
identical, and red where they differ. (It requires the ImageMagick
tools and ghostscript.)
#! /bin/bash
# Usage: $0 file1.pdf file2.pdf
# compares file1.pdf and file2.pdf by converting each page to bitmaps using
# ghostscript and then using the 'compare' ImageMagick utility
#
# Copyright 2007 Sanjoy Mahajan. Licensed under the GNU GPL version 2
# or (at your option) any later version.
#
# HISTORY
# 2007-01-15: First version
#
# configure these settings to your taste
viewer=xloadimage
# viewer=
dpi=300
imgformat=png256
ext=png
# mae is 'mean absolute error'. rmse also seems to work
metric=mae
# If you have a custom paper size, define the papersize variable like
# papersize="-dDEVICEWIDTHPOINTS=595.276 -dDEVICEHEIGHTPOINTS=841.89"
# A smarter script would figure out the papersize from the bounding box
papersize="-sPAPERSIZE=a4"
# FIXEDMEDIA and papersize setting are needed because otherwise image
# sizes could differ by O(1) pixel.
gs="gs -dFIXEDMEDIA ${papersize} -sDEVICE=${imgformat} -dNOPAUSE -dBATCH
-dSAFER -q -r${dpi} -dTextAlphaBits=4"
# the rest of the script should be fine
if [ -z "$1" -o -z "$2" ]; then
echo "Usage: $0 file1.pdf file2.pdf"
exit 3
fi
# generate the many page images in a temporary directory
d=`mktemp -d`
if ! [ -d "$d" -a -w "$d" ] ; then
echo "$0: Cannot write in temporary directory $d. Exiting..."
exit 1
fi
echo "Temp dir: $d"
# regexp to match the NNNN from %04d in the gs output filenames
numre='[0-9][0-9][0-9][0-9]'
# generate two sets of images, one image per page
$gs -sOutputFile=$d/one-%04d.$ext $1
$gs -sOutputFile=$d/two-%04d.$ext $2
# find the union of the page numbers (in case one pdf has more pages)
pages=`ls $d/{one,two}-$numre.$ext | sed "s/.*-\($numre\).$ext/\1/" | sort -un`
diffpages=
# compare each page
for p in $pages ; do
if ! [ -e "$d/one-$p.$ext" ] ; then
echo "$p: missing from $1"
continue
fi
if ! [ -e "$d/two-$p.$ext" ] ; then
echo "$p: missing from $2"
continue
fi
db=`compare -metric ${metric} $d/{one,two}-$p.$ext $d/diff-$p.$ext | grep dB`
if [ "$db" == "0 dB" ]; then
rm -f $d/diff-$p.$ext
else
echo "$p: $db of differences"
diffpages="$diffpages $p"
fi
done
if [ -n "$diffpages" ]; then
# To get a list of the page images with differences, uncomment next line:
# ls $d/diff-$numre.$ext
if [ -n $viewer ]; then $viewer $d/diff-$numre.$ext >& /dev/null ; fi
fi
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