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combine
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| #!/usr/bin/bash | |
| echo "processing $1 and $2" | |
| PNG0=$1 ## png0 <----- first image should be the BLACKEST | |
| PNG1=$2 ## png1 <----- second image should be the WHITEST | |
| #PNG2=$3 ## png2 <----- third - todo - this could be an opaque fg with tranparent bg | |
| bg_size=`identify -format '%wx%h' "$1"` | |
| #echo "bg is $bg_size" | |
| magick convert $PNG1 -resize $bg_size $PNG1 | |
| magick convert $PNG0 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG0 | |
| magick convert $PNG1 -channel RGBA -matte -colorspace gray -normalize -ordered-dither o8x8 gray_$PNG1 | |
| # set transparencies | |
| magick convert gray_$PNG0 -fuzz 20% -transparent white t_$PNG0 | |
| magick convert gray_$PNG1 -fuzz 20% -transparent black t_$PNG1 | |
| # set white to transparency | |
| magick composite -dissolve 30x30 -gravity South "t_$PNG1" "t_$PNG0" -alpha Set combined.png | |
| rm $PNG0 $PNG1 gray_$PNG0 gray_$PNG1 t_$PNG0 t_$PNG1 |
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magick - https://github.com/ImageMagick/ImageMagick