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#!/bin/bash
# This program generates a bitmap font for font_api mod for Minetest game.
# (c) Andrzej Pieńkowski <pienkowski.andrzej@gmail.com>
# (c) Pierre-Yves Rollo <dev@pyrollo.com>
# License: GPL
usage() {
echo "Usage: $0 fontfile fontname fontsize"
echo "fontfile: A TTF font file to use to create textures."
echo "fontname: The font name to be used in font_api (should be simple, with no spaces)."
echo "fontsize: Font height to be rendered."
}
if [ $# -ne 3 ]
then
usage
exit 1
fi
fontfile=$1
fontname=$2
fontsize=$3
if [ ! -r "$fontfile" ]
then
echo "$fontfile not readable."
exit 1
fi
# check imagemagick
hash convert &>/dev/null
if [ $? -eq 1 ]; then
echo -e "Error: This program requires convert from ImageMagick! Please install it by typing 'sudo apt-get install imagemagick' in terminal."
abort=1
fi
# check ttx
hash ttx &>/dev/null
if [ $? -eq 1 ]; then
echo -e "Error: This program requires ttx from FontTools! Please install it by typing 'sudo apt-get install fonttools' in terminal."
abort=1
fi
if [ $abort ]
then
exit 1
fi
generate() {
for i in $(seq $((0x$1)) $((0x$2)))
do
if echo "$codepoints" | grep -qi $(printf "0x%x" $i)
then
hex=$(printf "%04x" $i)
echo -e "Generating textures/font_${fontname}_$hex.png file for \"\\U$hex\" char."
if [[ "$hex" == "005c" ]] # Backslash char
then
convert -background none -fill black -font "$fontfile" -pointsize $fontsize label:"\\\\" -colorspace gray -channel alpha -threshold 50% textures/font_${fontname}_$hex.png
else
convert -background none -fill black -font "$fontfile" -pointsize $fontsize label:"$(echo -en "\\U$hex")" -colorspace gray -channel alpha -threshold 50% textures/font_${fontname}_$hex.png
fi
fi
done
}
mkdir textures
# Reads all available code points in the font.
codepoints=$(ttx -o - "$fontfile" | grep "<map code=" | cut -d \" -f 2)
# Mandatory chars
generate 0020 007f
# generate space and null characters
if [ ! -f "textures/font_${fontname}_0030.png" ]; then
echo "Error: Something wrong happened! Font was not generated!"
exit 1
else
size=$(identify textures/font_${fontname}_0030.png | cut -d " " -f 3)
if ! [[ $fontHeight =~ $re ]] ; then
echo "Error: Something wrong happened! Generated files might be broken!"
exit 1
else
w=$(expr $(echo $size | cut -d x -f 1) - 1)
h=$(expr $(echo $size | cut -d x -f 2) - 1)
# Space char
convert -size $size xc:transparent -colorspace gray textures/font_${fontname}_0020.png
# Null char
convert -size $size xc:transparent -colorspace gray -stroke black -fill transparent -strokewidth 1 -draw "rectangle 0,0 $w,$h" textures/font_${fontname}_0000.png
fi
fi
# Optional Unicode pages (see https://en.wikipedia.org/wiki/Unicode) :
# 00a0-00ff Latin-1 Supplement (full)
generate 00a0 00ff
# 0100-017f Latin Extended-A (full)
generate 0100 017f
# 0370-03ff Greek (full)
generate 0370 03ff
# 0400-04ff Cyrilic (full)
generate 0400 04ff
# 2000-206f General Punctuation (Limited to Dashes)
generate 2010 2015
# 2000-206f General Punctuation (Limited to Quotes)
generate 2018 201F
# 20a0-20cf Currency Symbols (Limited to Euro symbol)
generate 20ac 20ac
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