1#!/bin/bash 2 3dir=`mktemp -d` 4 5hb_shape=$1 6shift 7fontfile=$1 8if test "x${fontfile:0:1}" == 'x-'; then 9 echo "Specify font file before other options." >&2 10 exit 1 11fi 12shift 13if ! echo "$hb_shape" | grep -q 'hb-shape'; then 14 echo "Specify hb-shape (not hb-view, etc)." >&2 15 exit 1 16fi 17options= 18have_text=false 19for arg in "$@"; do 20 if test "x${arg:0:1}" == 'x-'; then 21 if echo "$arg" | grep -q ' '; then 22 echo "Space in argument is not supported: '$arg'." >&2 23 exit 1 24 fi 25 options="$options${options:+ }$arg" 26 continue 27 fi 28 if $have_text; then 29 echo "Too many arguments found... Use '=' notation for options: '$arg'" >&2 30 exit 1; 31 fi 32 text="$arg" 33 have_text=true 34done 35if ! $have_text; then 36 text=`cat` 37fi 38unicodes=`echo "$text" | ./hb-unicode-decode` 39glyphs=`echo "$text" | $hb_shape $options "$fontfile"` 40if test $? != 0; then 41 echo "hb-shape failed." >&2 42 exit 2 43fi 44glyph_names=`echo "$text" | $hb_shape $options --no-clusters --no-positions "$fontfile" | sed 's/[][]//g; s/|/,/g'` 45 46cp "$fontfile" "$dir/font.ttf" 47fonttools subset \ 48 --glyph-names \ 49 --no-hinting \ 50 --layout-features='*' \ 51 "$dir/font.ttf" \ 52 --glyphs="$glyph_names" \ 53 --text="$text" 54if ! test -s "$dir/font.subset.ttf"; then 55 echo "Subsetter didn't produce nonempty subset font in $dir/font.subset.ttf" >&2 56 exit 2 57fi 58 59# Verify that subset font produces same glyphs! 60glyphs_subset=`echo "$text" | $hb_shape $options "$dir/font.subset.ttf"` 61 62if ! test "x$glyphs" = "x$glyphs_subset"; then 63 echo "Subset font produced different glyphs!" >&2 64 echo "Perhaps font doesn't have glyph names; checking visually..." >&2 65 hb_view=${hb_shape/shape/view} 66 echo "$text" | $hb_view $options "$dir/font.ttf" --output-format=png --output-file="$dir/orig.png" 67 echo "$text" | $hb_view $options "$dir/font.subset.ttf" --output-format=png --output-file="$dir/subset.png" 68 if ! cmp "$dir/orig.png" "$dir/subset.png"; then 69 echo "Images differ. Please inspect $dir/*.png." >&2 70 echo "$glyphs" 71 echo "$glyphs_subset" 72 exit 2 73 fi 74 echo "Yep; all good." >&2 75 rm -f "$dir/orig.png" 76 rm -f "$dir/subset.png" 77 glyphs=$glyphs_subset 78fi 79 80sha1sum=`sha1sum "$dir/font.subset.ttf" | cut -d' ' -f1` 81subset="fonts/sha1sum/$sha1sum.ttf" 82mv "$dir/font.subset.ttf" "$subset" 83 84# There ought to be an easier way to do this, but it escapes me... 85unicodes_file=`mktemp` 86glyphs_file=`mktemp` 87echo "$unicodes" > "$unicodes_file" 88echo "$glyphs" > "$glyphs_file" 89# Open the "file"s 90exec 3<"$unicodes_file" 91exec 4<"$glyphs_file" 92while read uline <&3 && read gline <&4; do 93 echo "$subset:$options:$uline:$gline" 94done 95 96 97rm -f "$dir/font.ttf" 98rmdir "$dir" 99
