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