Advice needed XBM conversion

[pastukhov]

Can you say how to convert images to MONO?

[squix78]

Hi Artem

I described it here:
http://blog.squix.ch/2015/05/esp8266-nodemcu-how-to-create-xbm.html

Hope that helps
Daniel

2015-12-03 11:56 GMT+01:00 Artem Pastukhov [email protected]:

Can you say how to convert images to MONO?

—
Reply to this email directly or view it on GitHub
#5.

[pastukhov]

Hi!
I have made some black magic:

#!/bin/bash

for icon in *png; do
    convert $icon -depth 1 ./out/$(basename $icon .png)_1bpp.png
    convert ./out/$(basename $icon .png)_1bpp.png -background white -alpha Background ./out/$(basename $icon .png)_1bpp.xbm
    cat ./out/$(basename $icon .png)_1bpp.xbm | xxd -r -p |dd skip=6 bs=1  > ./out/$(basename $icon .png).xbm.mono
done

rm out/*png out/*xbm

[pastukhov]

Black magic v2.0

#!/bin/bash

for icon in *png; do
    convert $icon -depth 1 ./out/$(basename $icon .png)_1bpp.png
    convert ./out/$(basename $icon .png)_1bpp.png -background white -alpha Background ./out/$(basename $icon .png)_1bpp.xbm
    cat ./out/$(basename $icon .png)_1bpp.xbm | tr '\n' ' '  | tr -d " " |sed  -e s'#^.*{##g'  | sed s'#,}##' |sed s'/;//' | xxd -r -p > ./out/$(basename $icon .png).xbm.mono
done

rm out/*png out/*xbm

For all the png files in current folder it convert to 1 bit per pixel first, then set background to white and save to xbm. After filter out all except hex array, convert to binary and write to resulting mono image