#!/bin/bash -e
# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Render a text file into a bitmap. Files named '*.txt' are small font, those
# named '*.TXT' are large font.
#
# Options:
#
#    --rtl              Render right-to-left languages
#    --font=FONTNAME    Use specified font (instead of Helvetica)
#
font="Droid Sans"
rtl=""
point=22

while true ; do
  case "$1" in
    --rtl)
      rtl="--rtl"
      shift
      ;;
    --font=*)
      font="${1##*=}"
      shift
      ;;
    --point=*)
      point="${1##*=}"
      shift
      ;;
    *)
      break
      ;;
  esac
done


# Image parameters
# - New pango-view has --pixel to assign font size in pixel, but that is not
#   supported by old (ex, 1.24.5 in chroot) so we must assign --dpi 72 for
#   pointsize.
bg='#607c91'
small_color='#9ccaec'
small_font="$font"
small_pointsize="$point"
large_color="white"
large_font="$font"
large_pointsize=40

for txtfile in $*; do
  # pango-view does not support assigning output format options for bitmap, so
  # we first create the images in PNG format and then convert into BMP by
  # ImageMagick.
  pngfile="${txtfile%.*}".png
  bmpfile="${txtfile%.*}".bmp
  case "$txtfile" in
    *.txt)
      pango-view -q $rtl --no-auto-dir \
        --background "$bg" --foreground "$small_color" \
        --font "$small_font $small_pointsize" --dpi 72 \
        --margin=3 --align=center \
        --output "$pngfile" \
        "$txtfile"
      convert -colors 256 -compress none -alpha off "$pngfile" BMP3:"$bmpfile"
      rm -f "$pngfile"
      echo "wrote $bmpfile"
      ;;
    *.TXT)
      pango-view -q $rtl --no-auto-dir \
        --background "$bg" --foreground "$large_color" \
        --font "$large_font $large_pointsize" --dpi 72 \
        --margin=10 --align=center \
        --output "$pngfile" \
        "$txtfile"
      convert -colors 256 -compress none -alpha off "$pngfile" BMP3:"$bmpfile"
      rm -f "$pngfile"
      echo "wrote $bmpfile"
      ;;
    *)
      echo "Ignoring $txtfile. Filename should end with .txt or .TXT"
      ;;
  esac
done