#! /bin/bash
# Last edited on 2008-02-04 20:31:56 by stolfi

usage="${0##*/} NAME NX NY"

# Reads
# 
#    "NAME-s.jpg" the small (1/4 size) version of an image, 
#    "NAME.grmap" the (H,V) <-> (X,Y) projective matrices,
#    "NAME.grpts" the reference points of the image,
# 
# Writes an image "NAME-g.jpg" showing the reference points and the
# grid (assumed to be NX by NY cm).  Computes the matrix "NAME.grmap"
# if it is missing.
#    

if [ $# -ne 3 ]; then echo "usage: ${usage}"; exit 1; fi
name="$1"; shift;
nx="$1"; shift;
ny="$1"; shift;

batroot="${STOLFIHOME}/projects/fragments/IAB-2002/raw-sorted"
tools="${STOLFIHOME}/projects/fragments/IAB-2002/tools"

( cd ${batroot}/. )

img="${batroot}/${name}-s.jpg"
if [ ! -r ${img} ]; then
  echo "no image ${img}"; exit 1
fi

grpts="${batroot}/${name}.grpts"
if [ ! -r ${grpts} ]; then
  echo "no gridpoints file ${grpts}"; exit 1
fi

map="${batroot}/${name}.grmap"
${tools}/compute-grid-map -f ${tools}/r3x3.gawk -v check=0 < ${grpts} > ${map}

out="${batroot}/${name}-g.jpg"
gcmds="${batroot}/${name}.gcmds"
pcmds="${batroot}/${name}.pcmds"

${tools}/draw-grid -f ${tools}/r3x3.gawk \
  -v scale=0.25 \
  -v nx=${nx} -v ny=${ny} < ${map} > ${gcmds}
if [ ! -e ${gcmds} ]; then echo "file ${gcmds} not created"; exit 1; fi;

${tools}/draw-gridpoints \
  -v scale=0.25 \
  < ${grpts} > ${pcmds}
if [ ! -e ${pcmds} ]; then echo "file ${pcmds} not created"; exit 1; fi;

convert \
  -font '-*-courier-medium-r-*-*-10-*-*-*-*-*-iso8859-*' \
  -fill yellow -draw "@${gcmds}" \
  -fill red -draw "@${pcmds}" \
    ${img} ${out}
if [ ! -e ${out} ]; then echo "image ${out} doesnt exist"; exit 1; fi;

# display ${out}
/bin/rm -f ${pcmds} ${gcmds}