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https://github.com/ivuorinen/dotfiles.git
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Ismo Vuorinen
961efec364
* feat: switch to biome, apply formatting, shellcheck * chore: apply cr comments * chore: few config tweaks, shellcheck hook now py-based * chore: lint fixes and pr comments * chore(lint): megalinter, and other fixes Signed-off-by: Ismo Vuorinen <ismo@ivuorinen.net>
95 lines
2.0 KiB
Bash
Executable File
95 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# This file echoes a bunch of 24-bit color codes
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# to the terminal to demonstrate its functionality.
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# The foreground escape sequence is ^[38;2;<r>;<g>;<b>m
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# The background escape sequence is ^[48;2;<r>;<g>;<b>m
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# <r> <g> <b> range from 0 to 255 inclusive.
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# The escape sequence ^[0m returns output to default
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setBackgroundColor()
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{
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echo -en "\x1b[48;2;$1;$2;$3""m"
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}
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resetOutput()
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{
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echo -en "\x1b[0m\n"
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}
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# Gives a color $1/255 % along HSV
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# Who knows what happens when $1 is outside 0-255
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# Echoes "$red $green $blue" where
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# $red $green and $blue are integers
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# ranging between 0 and 255 inclusive
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rainbowColor()
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{
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((h = $1 / 43))
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((f = $1 - 43 * h))
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((t = f * 255 / 43))
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((q = 255 - t))
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if [ $h -eq 0 ]; then
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echo "255 $t 0"
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elif [ $h -eq 1 ]; then
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echo "$q 255 0"
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elif [ $h -eq 2 ]; then
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echo "0 255 $t"
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elif [ $h -eq 3 ]; then
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echo "0 $q 255"
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elif [ $h -eq 4 ]; then
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echo "$t 0 255"
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elif [ $h -eq 5 ]; then
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echo "255 0 $q"
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else
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# execution should never reach here
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echo "0 0 0"
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fi
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}
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for i in $(seq 0 127); do
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setBackgroundColor "$i" 0 0
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echo -en " "
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done
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resetOutput
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for i in $(seq 255 128); do
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setBackgroundColor "$i" 0 0
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echo -en " "
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done
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resetOutput
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for i in $(seq 0 127); do
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setBackgroundColor 0 "$i" 0
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echo -n " "
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done
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resetOutput
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for i in $(seq 255 128); do
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setBackgroundColor 0 "$i" 0
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echo -n " "
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done
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resetOutput
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for i in $(seq 0 127); do
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setBackgroundColor 0 0 "$i"
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echo -n " "
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done
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resetOutput
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for i in $(seq 255 128); do
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setBackgroundColor 0 0 "$i"
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echo -n " "
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done
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resetOutput
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for i in $(seq 0 127); do
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# shellcheck disable=SC2046 # Intentional word splitting to pass 3 RGB values as separate args
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setBackgroundColor $(rainbowColor "$i")
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echo -n " "
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done
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resetOutput
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for i in $(seq 255 128); do
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# shellcheck disable=SC2046 # Intentional word splitting to pass 3 RGB values as separate args
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setBackgroundColor $(rainbowColor "$i")
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echo -n " "
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done
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resetOutput
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