HarfBuzz text shaping engine
http://harfbuzz.github.io/
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96 lines
2.4 KiB
96 lines
2.4 KiB
#!/bin/bash |
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dir=`mktemp --directory` |
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hb_shape=$1 |
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shift |
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fontfile=$1 |
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if test "x${fontfile:0:1}" == 'x-'; then |
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echo "Specify font file before other options." >&2 |
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exit 1 |
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fi |
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shift |
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if ! echo "$hb_shape" | grep -q 'hb-shape'; then |
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echo "Specify hb-shape (not hb-view, etc)." >&2 |
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exit 1 |
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fi |
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options= |
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have_text=false |
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for arg in "$@"; do |
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if test "x${arg:0:1}" == 'x-'; then |
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if echo "$arg" | grep -q ' '; then |
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echo "Space in argument is not supported: '$arg'." >&2 |
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exit 1 |
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fi |
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options="$options${options:+ }$arg" |
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continue |
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fi |
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if $have_text; then |
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echo "Too many arguments found... Use '=' notation for options: '$arg'" >&2 |
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exit 1; |
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fi |
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text="$arg" |
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have_text=true |
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done |
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if ! $have_text; then |
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text=`cat` |
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fi |
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unicodes=`echo "$text" | ./hb-unicode-decode` |
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glyphs=`echo "$text" | $hb_shape $options "$fontfile"` |
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if test $? != 0; then |
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echo "hb-shape failed." >&2 |
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exit 2 |
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fi |
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cp "$fontfile" "$dir/font.ttf" |
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fonttools subset \ |
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--glyph-names \ |
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--no-hinting \ |
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--layout-features='*' \ |
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"$dir/font.ttf" \ |
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--text="$text" |
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if ! test -s "$dir/font.subset.ttf"; then |
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echo "Subsetter didn't produce nonempty subset font in $dir/font.subset.ttf" >&2 |
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exit 2 |
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fi |
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# Verify that subset font produces same glyphs! |
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glyphs_subset=`echo "$text" | $hb_shape $options "$dir/font.subset.ttf"` |
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if ! test "x$glyphs" = "x$glyphs_subset"; then |
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echo "Subset font produced different glyphs!" >&2 |
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echo "Perhaps font doesn't have glyph names; checking visually..." >&2 |
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hb_view=${hb_shape/shape/view} |
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echo "$text" | $hb_view $options "$dir/font.ttf" --output-format=png --output-file="$dir/orig.png" |
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echo "$text" | $hb_view $options "$dir/font.subset.ttf" --output-format=png --output-file="$dir/subset.png" |
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if ! cmp "$dir/orig.png" "$dir/subset.png"; then |
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echo "Images differ. Please inspect $dir/*.png." >&2 |
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echo "$glyphs" |
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echo "$glyphs_subset" |
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exit 2 |
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fi |
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echo "Yep; all good." >&2 |
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rm -f "$dir/orig.png" |
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rm -f "$dir/subset.png" |
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glyphs=$glyphs_subset |
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fi |
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sha1sum=`sha1sum "$dir/font.subset.ttf" | cut -d' ' -f1` |
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subset="fonts/sha1sum/$sha1sum.ttf" |
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mv "$dir/font.subset.ttf" "$subset" |
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# There ought to be an easier way to do this, but it escapes me... |
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unicodes_file=`mktemp` |
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glyphs_file=`mktemp` |
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echo "$unicodes" > "$unicodes_file" |
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echo "$glyphs" > "$glyphs_file" |
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# Open the "file"s |
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exec 3<"$unicodes_file" |
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exec 4<"$glyphs_file" |
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while read uline <&3 && read gline <&4; do |
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echo "$subset:$options:$uline:$gline" |
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done |
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rm -f "$dir/font.ttf" |
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rmdir "$dir"
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