# \converter lyxpreview ${FORMAT} "lyxpreview2bitmap.sh" ""
# where ${FORMAT} is either ppm or png.
-# These programs are used by the script.
+# These four programs are used by the script.
# Adjust their names to suit your setup.
test -n "$LATEX" || LATEX=latex
-DVIPNG=/home/angus/preview-latex/devel/dvipng/dvipng
DVIPS=dvips
GS=gs
PNMCROP=pnmcrop
readonly LATEX DVIPS GS PNMCROP
-# Some helper functions.
+# Three helper functions.
FIND_IT ()
{
test $# -eq 1 || exit 1
grep 'Package: preview' $1
}
-CHECK_FOR_PROGRAMS () {
- test $# -eq 1 || exit 1
- if [ $1 = "ppm" ]; then
- # We use latex, dvips and gs, so check that they're all there.
- FIND_IT ${LATEX}
- FIND_IT ${DVIPS}
- FIND_IT ${GS}
- elif [ "$3" = "png" ]; then
- # We use latex and dvipng
- FIND_IT ${LATEX}
- FIND_IT ${DVIPNG}
- fi
-}
-
-GENERATE_PPM_FILES () {
- test $# -eq 2 || exit 1
-
- BASE=$1
- RESOLUTION=$2
-
- # DVI -> PostScript
- PSFILE=${1}.ps
-
- ${DVIPS} -o ${PSFILE} ${DVIFILE} || {
- BAIL_OUT "Failed: ${DVIPS} -o ${PSFILE} ${DVIFILE}"
- }
-
- # PostScript -> Bitmap files
- # Older versions of gs have problems with a large degree of
- # anti-aliasing at high resolutions
-
- # test expects integer arguments.
- # ${RESOLUTION} may be a float. Truncate it.
- INT_RESOLUTION=`echo "${RESOLUTION} / 1" | bc`
-
- ALPHA=4
- if [ ${INT_RESOLUTION} -gt 150 ]; then
- ALPHA=2
- fi
-
- GSDEVICE=pnmraw
- GSSUFFIX=ppm
-
- ${GS} -q -dNOPAUSE -dBATCH -dSAFER \
- -sDEVICE=${GSDEVICE} -sOutputFile=${BASE}%d.${GSSUFFIX} \
- -dGraphicsAlphaBit=${ALPHA} -dTextAlphaBits=${ALPHA} \
- -r${RESOLUTION} ${PSFILE} ||
- {
- BAIL_OUT "Failed: ${GS} ${PSFILE}"
- }
-
- # All has been successful, so remove everything except the bitmap files
- # and the metrics file.
- FILES=`ls ${BASE}* | sed -e "/${BASE}.metrics/d" \
- -e "/${BASE}\([0-9]*\).${GSSUFFIX}/d"`
-# rm -f ${FILES} texput.log
-
- # The bitmap files can have large amounts of whitespace to the left and
- # right. This can be cropped if so desired.
- CROP=1
- type ${PNMCROP} > /dev/null || CROP=0
-
- if [ ${CROP} -eq 1 ]; then
- for FILE in ${BASE}*.${GSSUFFIX}
- do
- if ${PNMCROP} -left ${FILE} 2> /dev/null |\
- ${PNMCROP} -right 2> /dev/null > ${BASE}.tmp; then
- mv ${BASE}.tmp ${FILE}
- else
- rm -f ${BASE}.tmp
- fi
- done
- rm -f ${BASE}.tmp
- fi
-}
-
-GENERATE_PNG_FILES () {
- test $# -eq 2 || exit 1
-
- BASE=$1
- RESOLUTION=$2
-
- ${DVIPNG} -D${RESOLUTION} -o${BASE}%d.png ${DVIFILE}
-}
-
-echo $*
-
# Preliminary check.
if [ $# -ne 3 ]; then
exit 1
fi
+# We use latex, dvips and gs, so check that they're all there.
+FIND_IT ${LATEX}
+FIND_IT ${DVIPS}
+FIND_IT ${GS}
+
# Extract the params from the argument list.
DIR=`dirname $1`
BASE=`basename $1 .tex`
SCALEFACTOR=$2
-OUTPUTFORMAT=$3
-if [ "${OUTPUTFORMAT}" != "ppm" -a "${OUTPUTFORMAT}" != "png" ]; then
+if [ "$3" = "ppm" ]; then
+ GSDEVICE=pnmraw
+ GSSUFFIX=ppm
+elif [ "$3" = "png" ]; then
+ GSDEVICE=png16m
+ GSSUFFIX=png
+else
BAIL_OUT "Unrecognised output format ${OUTPUTFORMAT}. \
Expected either \"ppm\" or \"png\"."
fi
-CHECK_FOR_PROGRAMS ${OUTPUTFORMAT}
-
# Initialise some variables.
TEXFILE=${BASE}.tex
LOGFILE=${BASE}.log
DVIFILE=${BASE}.dvi
+PSFILE=${BASE}.ps
METRICSFILE=${BASE}.metrics
-readonly TEXFILE LOGFILE DVIFILE METRICSFILE
+readonly TEXFILE LOGFILE DVIFILE PSFILE METRICSFILE
# LaTeX -> DVI.
cd ${DIR}
${SCALEFACTOR} * (10/${LATEXFONT}) * (1000/${MAGNIFICATION})" \
| bc`
-# 4. Generate the bitmap files and clean-up.
-if [ "${OUTPUTFORMAT}" = "ppm" ]; then
- GENERATE_PPM_FILES ${BASE} ${RESOLUTION}
-else
- GENERATE_PNG_FILES ${BASE} ${RESOLUTION}
+# DVI -> PostScript
+${DVIPS} -o ${PSFILE} ${DVIFILE} ||
+{
+ BAIL_OUT "Failed: ${DVIPS} -o ${PSFILE} ${DVIFILE}"
+}
+
+# PostScript -> Bitmap files
+# Older versions of gs have problems with a large degree of
+# anti-aliasing at high resolutions
+
+# test expects integer arguments.
+# ${RESOLUTION} may be a float. Truncate it.
+INT_RESOLUTION=`echo "${RESOLUTION} / 1" | bc`
+
+ALPHA=4
+if [ ${INT_RESOLUTION} -gt 150 ]; then
+ ALPHA=2
+fi
+
+${GS} -q -dNOPAUSE -dBATCH -dSAFER \
+ -sDEVICE=${GSDEVICE} -sOutputFile=${BASE}%d.${GSSUFFIX} \
+ -dGraphicsAlphaBit=${ALPHA} -dTextAlphaBits=${ALPHA} \
+ -r${RESOLUTION} ${PSFILE} ||
+{
+ BAIL_OUT "Failed: ${GS} ${PSFILE}"
+}
+
+# All has been successful, so remove everything except the bitmap files
+# and the metrics file.
+FILES=`ls ${BASE}* | sed -e "/${BASE}.metrics/d" \
+ -e "/${BASE}\([0-9]*\).${GSSUFFIX}/d"`
+rm -f ${FILES} texput.log
+
+# The bitmap files can have large amounts of whitespace to the left and
+# right. This can be cropped if so desired.
+CROP=1
+type ${PNMCROP} > /dev/null || CROP=0
+
+# There's no point cropping the image if using PNG images. If you want to
+# crop, use PPM.
+# Apparently dvipng will support cropping at some stage in the future...
+if [ ${CROP} -eq 1 -a "${GSDEVICE}" = "pnmraw" ]; then
+ for FILE in ${BASE}*.${GSSUFFIX}
+ do
+ if ${PNMCROP} -left ${FILE} 2> /dev/null |\
+ ${PNMCROP} -right 2> /dev/null > ${BASE}.tmp; then
+ mv ${BASE}.tmp ${FILE}
+ else
+ rm -f ${BASE}.tmp
+ fi
+ done
+ rm -f ${BASE}.tmp
fi
echo "Previews generated!"
projects / lyx.git / blobdiff