From ba3e5d327b034d3e42f04ae77bf9eb571ba49962 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sat, 13 Jul 2019 14:20:22 -0400
Subject: scripts/gen-mplus-patch.sh: WIP

Incomplete and buggy.
---
diff --git a/scripts/gen-mplus-patch.sh b/scripts/gen-mplus-patch.sh
new file mode 100644
index 0000000..af7634f
--- /dev/null
+++ b/scripts/gen-mplus-patch.sh
@@ -0,0 +1,203 @@
+#!/bin/sh
+#
+# Generate a patch to add M+ fbcon fonts to Linux(-libre)
+#
+# Copyright (C) 2019  Patrick McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set -eu
+
+VARIANTS='
+	1m  regular 16 22
+	1m  bold    16 22
+	1mn regular 16 22
+	1mn bold    16 22
+	'
+LF='
+'
+
+backup_orig()
+{
+	local f=
+
+	for f in include/linux/font.h lib/fonts/Kconfig lib/fonts/Makefile \
+			lib/fonts/fonts.c; do
+		if ! [ -e "tmp/src/${f}.orig" ]; then
+			mv "tmp/src/${f}" "tmp/src/${f}.orig"
+		fi
+	done
+}
+
+edit_font_h()
+{
+	local state=
+	local i=
+	local line=
+	local ft=
+
+	exec 3>'tmp/src/include/linux/font.h'
+	state='want_defs'
+	i=0
+	while IFS='' read -r line; do
+		if [ x"${state}" = x'want_defs' ] || [ x"${state}" = x'defs' ]
+		then
+			case "${line}" in '#define '*'_IDX'*)
+				state='defs'
+				printf '%s\n' "${line}" 1>&3
+				: $((i += 1))
+				continue
+			esac
+		fi
+		if [ x"${state}" = x'defs' ]; then  # End of defines
+			while read fc wt wd ht; do
+				[ -z "${fc}" ] && continue
+				ft="MPLUS_$(printf '%s_%s' "${fc}" "${wt}" | \
+					tr '[a-z]' '[A-Z]')_${wd}x${ht}_IDX"
+				printf '#define %s\t%d\n' "${ft}" ${i} 1>&3
+				: $((i += 1))
+			done <<-EOF
+				${VARIANTS}
+				EOF
+			state='want_decls'
+		fi
+		if [ x"${state}" = x'want_decls' ]; then
+			case "${line}" in *'struct font_desc'*)
+				state='decls'
+			esac
+		fi
+		if [ x"${state}" = x'decls' ]; then
+			case "${line}" in *';')
+				printf '%s\n' "${line%;}" 1>&3
+				while read fc wt wd ht; do
+					[ -z "${fc}" ] && continue
+					printf ',\t\t\tfont_mplus_%s_%s'"$(: \
+						)"'_%dx%d' "${fc}" "${wt}" \
+						"${wd}" "${ht}" 1>&3
+				done <<-EOF
+					${VARIANTS}
+					EOF
+				printf ';\n' 1>&3
+				state='end'
+				continue
+			esac
+			printf '%s\n' "${line}" 1>&3
+		fi
+		printf '%s\n' "${line}" 1>&3
+	done 0<'tmp/src/include/linux/font.h.orig'
+
+	if ! [ x"${state}" = x'end' ]; then
+		printf 'Error editing include/linux/font.h\n' 1>&2
+		return 1
+	fi
+
+	return 0
+}
+
+edit_kconfig()
+{
+}
+
+edit_makefile()
+{
+}
+
+edit_fonts_c()
+{
+}
+
+
+gen_headers()
+{
+	local mplus_dir="${1}"
+	shift 1
+	local mplus_ver=
+
+	mplus_ver="$(tr '\0' '\n' <"${mplus_dir}/mplus-1m-regular.ttf" | \
+		sed -n 's/^Version 1.//p')"
+	cat <<-EOF
+	Author: Patrick McDermott <patrick.mcdermott@libiquity.com>
+	Subject: Add M+ fonts
+
+	Generated from M+ version ${mplus_ver} by ${0}
+	EOF
+	return 0
+}
+
+gen_diff()
+{
+	local headers="${1}"
+	shift 1
+	local files=
+	local fc=
+	local wt=
+	local wd=
+	local ht=
+	local f=
+	local diff=
+	local a=
+	local b=
+
+	files="include/linux/font.h${LF}lib/fonts/Kconfig${LF}"
+	files="${files}lib/fonts/Makefile${LF}"
+	while read fc wt wd ht; do
+		[ -z "${fc}" ] && continue
+		f="lib/fonts/font_mplus_${fc}_${wt}_${wd}x${ht}.c"
+		files="${files}${f}${LF}"
+	done <<-EOF
+		${VARIANTS}
+		EOF
+	files="${files}lib/fonts/fonts.c${LF}"
+
+	diff=''
+	for f in ${files}; do
+		a="tmp/src/${f}"
+		b="tmp/src/${f}.orig"
+		case "${f}" in lib/fonts/font_*.c) a='/dev/null';; esac
+		diff="${diff}diff -Naurp a/${f} b/${f}${LF}"
+		diff="${diff}--- a/${f}${LF}"
+		diff="${diff}+++ a/${f}${LF}"
+		diff="${diff}$(diff -up "${a}" "${b}" | tail -n +3)${LF}"
+	done
+	diff="${headers}${LF}---${LF}$(printf '%s' "${diff}" | \
+		diffstat)${LF}${diff}"
+
+	return 0
+}
+
+main()
+{
+	local mplus_dir=
+	local bdf2fbcon=
+
+	if [ ${#} -ne 2 ]; then
+		printf 'Usage: %s <mplus-dir> <bdf2fbcon>\n' "${0}" 1>&2
+		return 1
+	fi
+	mplus_dir="${1}"
+	bdf2fbcon="${2}"
+	shift 2
+
+	conv_fonts "${mplus_dir}" "${bdf2fbcon}"
+	backup_orig
+	edit_font_h
+	edit_kconfig
+	edit_makefile
+	edit_fonts_c
+	gen_diff "$(gen_headers "${mplus_dir}")"
+
+	return 0
+}
+
+main "${@}"
--
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