#!/bin/sh
#
# "$Id$"
#
#   Button generation script for the Common UNIX Printing System (CUPS).
#
#   Originally created and donated by Philippe Combes (see STR #2231).
#
#   Copyright 2007 by Easy Software Products, all rights reserved.
#
#   These coded instructions, statements, and computer programs are the
#   property of Easy Software Products and are protected by Federal
#   copyright law.  Distribution and use rights are outlined in the file
#   "LICENSE.txt" which should have been included with this file.  If this
#   file is missing or damaged please contact Easy Software Products
#   at:
#
#       Attn: CUPS Licensing Information
#       Easy Software Products
#       44141 Airport View Drive, Suite 204
#       Hollywood, Maryland 20636-3142 USA
#
#       Voice: (301) 373-9600
#       EMail: cups-info@cups.org
#         WWW: http://www.cups.org
#

#
# This little script uses convert from ImageMagick to generate CUPS buttons.
# It requires ImageMagick version 6.2.4 or higher.
#
# It can generate 20-pixel high one-line buttons and 40-pixel high two-line
# buttons.
#
# Usage:
#
#     tools/makebuttons locale buttons.txt
#
# "Locale" is the locale name, either "ll" or "ll_CC" where "ll" is the
# 2-letter language abbreviation and "CC" is the 2-letter ISO country
# code.  The new "ll-region" syntax is *not* supported at this time
# and should not be used!
#
# "Buttons.txt" is a file containing the buttons to be created and must
# be formatted as follows:
#
#     filename.gif color text for button
# 
# "filename.gif" is the name of the image file to create.
#
# "color" is the color of the button, one of "std" (the normal olive
# background), "black", "green", or "red".
#
# The remainder of the line following the color is used as the text
# for the button.  Use "@UP" and "@DOWN" to include up and down arrows,
# and "\\n" to break the text into 2 lines (not generally recommended).
#
# Lines starting with '#' are treated as comments.  See the file
# "tools/buttons.txt" for inspiration...
#

if test $# -lt 2; then
	echo Usage: tools/makebuttons locale buttons.txt
	exit 1
elif test ! -d tools; then
	echo ERROR: You MUST run the makebuttons script from the main CUPS source directory!
	exit 1
elif test "x`convert --help | grep extent`" = x; then
	echo ERROR: This script requires ImageMagick 6.2.4 or higher.
	exit 1
else
	locale=$1
	list=$2
fi

if test ! -f $list; then
	echo "ERROR: $list: file not found."
	exit 1
elif test ! -r $list; then
	echo "ERROR: $list: cannot read file."
	exit 1
fi


# Bitstream Vera font...
font="fonts/Vera.ttf"

# Base image
base="tools/buttons.gif"

# Colors
background="#d4d4a4"
black="#000000"
green="#009900"
red="#cc0000"
standard="#666633"


# 'generate_button()' - Create a button image.
#
# Arg 1: button filename (WITH .gif extension!)
# Arg 2: button color: black, green, red or std (only the initial letter matters)
# Arg 3+: the text !

function generate_button()
{
	# Collect arguments...
	filename=$1
	shift

	color=$1
	shift

	txt="$*"

	# Show progress...
	echo Creating $filename...

	# Figure out the foreground and background colors...
	bgclr=$background

	case x$color in
		xb*)
        		fgclr=$black
        		fuzz="10%"
        		;;

		xg*)
        		fgclr=$green
        		fuzz="10%"
        		;;

		xr*)
        		fgclr=$red
        		fuzz="1%"
        		;;

		xs*)
        		fgclr=$standard
        		fuzz="10%"
        		;;

		*)
        		echo "ERROR: Unknown color $color for $filename!"
        		exit 1
        		;;
	esac

	# See if we need to add the up or down arrows...
	add_arrows=0 # 1: up arrows, 2: down arrows

	if echo $txt | grep '@UP' > /dev/null 2>&1; then
		add_arrows=1
		txt="`echo $txt | sed 's|@UP||g'`"
	elif echo $txt | grep '@DOWN' > /dev/null 2>&1; then
		add_arrows=2
		txt="`echo $txt | sed 's|@DOWN||g'`"
	fi

	tmp_btn=/tmp/cups-btn-$$.bmp

	# First step: generate an image trimmed to the text.
	#  -> annotate a 40x400 rectangle with the provided text
	#  -> trim to the text
	convert $base -extent 400x40 -fill "$fgclr" \
		-draw "rectangle 0,0 399,39" \
        	-fill "#ffffff" -encoding Unicode -pointsize 13 -font "$font" \
        	-gravity Center -annotate 0x0+0+0 "$txt" -trim $tmp_btn

	# From the 1st step, we get text width and height
	txt_h=`identify -format "%h" $tmp_btn`
	txt_w=`identify -format "%w" $tmp_btn`

	if test $txt_h -gt 32; then
		echo "ERROR: 2 lines maximum for the button text"
		exit 1
	fi

	# With the default font, one line is less than 16 pixels high, and a
	# two lines of text is at least 20 pixels high.  So, from the text
	# height we guess if we need a one- or two-line button.
	if test $txt_h -ge 18; then
		btn_h=40
	else
		btn_h=20
	fi

	if test $add_arrows -gt 0; then
		if test $btn_h -eq 20; then
			txt_w=`expr $txt_w + 36`
		elif test $btn_h -eq 40; then
			txt_w=`expr $txt_w + 58`
		fi
	fi

	# Second step: generate the button.
	#
	# Procedure:
	#
	#     - Draw a rectangle with the background color (for correct
	#       button borders)
	#     - Draw a roundRectangle (args are coordinates, not lengths!)
	#     - Make the background transparent (with correct fuzz feature)
	#     - Annotate centered text (in height, it is necessary to have
	#       -1 in y parameter so that the text is not too low)
	rad=`expr $btn_h / 2`
	btn_w=`expr $txt_w + $rad + $rad`
	btn_top=`expr $btn_h - 1`

	convert $base \
        	-extent $btn_w'x'$btn_h -fill "$bgclr" \
        	-draw "rectangle 0,0 $btn_w,$btn_h" -fill "$fgclr" \
        	-draw "roundRectangle 0,0 `expr $btn_w - 1`,$btn_top `expr $rad - 1`,$rad" \
        	-fuzz $fuzz -transparent "$bgclr" -write $filename \
        	-fill "#ffffff" -encoding Unicode -pointsize 13 \
        	-font "$font" -gravity Center -annotate 0x0+0-1 "$txt" \
        	$filename

	if test $add_arrows -gt 0; then
		if test $add_arrows -eq 1; then
			# UP arrows
        		if test $btn_h -eq 20; then
				# 1-line buttons
        			pts1="9,15 21,15 15,4"
        			pts2="`expr $btn_w - 10`,15 `expr $btn_w - 22`,15 `expr $btn_w - 16`,4"
        		else
				# 2-line buttons
        			pts1="16,30 34,30 25,10"
        			pts2="`expr $btn_w - 17`,30 `expr $btn_w - 35`,30 `expr $btn_w - 26`,10"
        		fi
		else
			# DOWN arrows
        		if [ $btn_h -eq 20 ]; then
				# 1-line buttons
        			pts1="9,4 21,4 15,15"
        			pts2="`expr $btn_w - 10`,4 `expr $btn_w - 22`,4 `expr $btn_w - 16`,15"
        		else
				# 2-line buttons
        			pts1="16,10 34,10 25,30"
        			pts2="`expr $btn_w - 17`,10 `expr $btn_w - 35`,10 `expr $btn_w - 26`,30"
        		fi
		fi

		convert $filename -fill "#ffffff" -draw "polygon $pts1" \
        		-draw "polygon $pts2" $filename
	fi

	rm -f $tmp_btn
}

# Make sure the locale-specific destination directory exists...
if test ! -d doc/$locale/images; then
	echo Creating doc/$locale/images...
	mkdir -p doc/$locale/images
fi

# Process each line in the file...
cat $list | while read line; do
	if test "x`echo $line | cut -c1`" = "x#"; then
		continue
	fi

	generate_button doc/$locale/images/$line
done

#
# End of "$Id$".
#