#!/bin/bash

function umtopix()
{ 
  echo $(( $1 * 10 / 254 ))
}

function scalenum()
{ echo $(( $1 * $W / `umtopix 25800` ))
}

#diameter in micrometers
W=`umtopix 20000`
W=`umtopix 20000`
H=$W

#output file name
COINNAME=coin-fukitol

# set to 0 to disable the circle mark
#CIRCLE=1

#font size
TXTSZ=`scalenum 150`

#width of text bar, characterizes spacing from the coin edge
TXTBAR=`scalenum 300`

#text content
TXT="FUKITOL\n500 mg"

IMAGE=bigbrother-silhouette.png

IMAGESIZEX=`scalenum 720`
IMAGEPOSX=0
IMAGEPOSY=60

IMAGESIZE=${IMAGESIZEX}x${IMAGESIZEX}
IMAGEPOS=+`scalenum $IMAGEPOSX`+`scalenum IMAGEPOSY`


# 300 -> 0.77
# 250 -> 0.80
# 200 -> 0.84

FONT="Helvetica-Bold"
KERN=6

TMPF=tmp.png

CIRCLECOL=yellow

convert -size ${W}x${H} xc:$BACKGROUND \
  -colorspace Gray \
  -gravity center \
  -fill black \
  -strokewidth 10 \
  -gravity center \
  -font "$FONT" -pointsize $TXTSZ -kerning $KERN -strokewidth 4 -fill black -stroke none -interline-spacing 50 \
  -annotate +0+0 "$TXT" \
  -gravity center \
  -draw "fill none stroke $CIRCLECOL circle $(( $W / 2 )),$(( $H / 2 )),0,$(( $H / 2 )) " \
  -density 1000 -units PixelsPerInch \
  $COINNAME.png
convert $COINNAME.png -dither none -colors 2 -monochrome $COINNAME.bmp