LinuxBBQ

Code: Select all

#!/bin/bash
# takes an image and creates a color palette from it
# which gets echoed to the console.
#
# made by rhowaldt (fuck you)
#
# depends: imagemagick

# Squashed Bugs

#   Bug #1:
#     when the script is launched without arguments, it hangs in convert
#     because convert is then expecting its input from stdin.
#     This is not bad in itself, but it can be confusing because the user
#     is not aware of it.
#   Solution for Bug #1:
#     Test for $1 not equal to the empty string to read from an image file.
#     If there is no argument to the program, warn the user about the program
#     reading its input from stdin.

#   Bug #2:
#     The convert command produces an empty line as the last line in its output.
#     There is no need to transform that empty line to an escape sequence,
#     though there don't seem to be any averse effects.
#   Solution for Bug #2:
#     Test for for an empty line within the read command and break when you encounter it.

[[ "$1" ]] || {
    printf '%s\n' "You have not supplied the path to an image to be sampled.
${0} will read the image from stdin.

If that is what you intended, you can ignore this message.

If that is _NOT_ what you intended, press Ctrl-D on an empty line to stop reading stdin.
There will be an  error message from the 'convert' utility that you can ignore.

Restart the program with the path to the image as argument."
} >&2

COL=("0" "8" "1" "9" "2" "A" "3" "B" "4" "C" "5" "D" "6" "E" "7" "F");
x=0

while read -r line; do
    [[ "$line" ]] || continue
    echo -en "\e]P${COL[$x]}$line";
    x=$((x+1))
done < <(convert "$1" -colors 16 -format "%c" histogram:info: | sed 's/^.*\#\(.*\) srgb.*/\1/g')

Code: Select all

live@wheezy:~$ ./palleter1.sh /home/live/images/lightrails.png
]P0080604]P8241F20]P1261A12]P92D231C]P2352B25]PA48392E]P3532510]PB5C4738]P46E5849]PC90705A]P59B532A]PDAC8C72]P6CEB197]PED39E6F]P7D9BFA7]PFF9F2E9live@wheezy:~$ 

Code: Select all

#!/bin/bash
# takes an image and creates a color palette from it
# depends: imagemagick

PALETTE=$(convert "$1" -colors 16 -format "%c" histogram:info:)
HEXLIST=$(echo "$PALETTE" | sed 's/^.*\#\(.*\) srgb.*/\1/g')
COL=("0" "8" "1" "9" "2" "A" "3" "B" "4" "C" "5" "D" "6" "E" "7" "F");
CLEAN=$(echo $COL | sed 's/^0*//')

x=0

## Get the ouput of the color palette
while read -r line; do
    [[ "$line" ]] || continue
    echo -en *color$x: '#'"${CLEAN}$line\n";
    x=$((x+1))
done < <(convert "$1" -colors 16 -format "%c" histogram:info: | sed 's/^.*\#\(.*\) srgb.*/\1/g')

Code: Select all

./paletterX ~/path/to/wall.jpg > temp && [editor] temp &

Code: Select all

./palleterX /path/to/image