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#!/bin/bash
# convert -list font | grep Font
# convert -list font | grep "^ Font:" | grep Mono #
font="FreeMono-Regular" # PC16.CentOS7
font="Droid-Sans-Mono-Regular" # 12hpmini.deb-7.11
font="DejaVu-Sans-Mono-Book" # PC16.CentOS7
#
if [ -r rnd80.png.txt ];then true; else
dd if=/dev/urandom bs=285 count=1 status=noxfer 2>/dev/null\
| base64 > rnd80.png.txt
fi
convert -size 3800x600 xc:white -pointsize 80 -fill black\
-font "$font"\
-draw "text 2,80 \"$(head -1 <rnd80.png.txt)\""\
-draw "text 2,160 \"$(head -2 <rnd80.png.txt| tail -1)\""\
-draw "text 2,240 \"$(head -3 <rnd80.png.txt| tail -1)\""\
-draw "text 2,320 \"$(head -4 <rnd80.png.txt| tail -1)\""\
-draw "text 2,400 \"$(head -5 <rnd80.png.txt| tail -1)\""\
PNG8:rnd80-$font.png
cp rnd80.png.txt rnd80-$font.png.txt
identify rnd80-$font.png
# display -geometry 600x400 out30.png
# rnd80-Droid-Sans-Mono-Regular.png 236KB 4*16bit/pixel
# -> pngtopnm P5 65535=16bit gray 4.4MB (3800*600=2.280M * 16bit)
# xy=452,203 89 249 255 Endianess.NetPBM=MSB most sig. byte first
# rnd80-Droid-Sans-Mono-Regular_8bit.png 121KB 3*8bit/pixel
# -> pngtopnm P5 255=8bit gray 2.2MB (3800*600=2.280M * 8bit)
# xy=452,203 90 248 255
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