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Using ImageMagick, based on rlogo_icon.h.
#!/bin/sh
echo 'unsigned long rlogo_icon[] = {'
identify -format '%w, %h,' $1
convert $1 -color-matrix '0 0 1 0, 0 1 0 0, 1 0 0 0, 0 0 0 1' RGBA:- | hexdump -v -e '1/4 "0x%08x,\n"'
echo '};'
Usage:
./script.sh rlogo_icon.png > rlogo_icon.h
I'm not sure this -color-matrix is always correct. I placed bytes in ...
2
extent must be used after background and gravity, e.g.:
gm convert -resize '1920x1080>' -background black -gravity SouthEast -extent 1920x1080 infile outfile
or
gm convert infile -resize '1920x1080>' -background black -gravity SouthEast -extent 1920x1080 outfile
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