1 files changed, 43 insertions, 0 deletions
diff --git a/colors/demo.sh b/colors/demo.sh
new file mode 100755
index 0000000..19278eb
--- /dev/null
+++ b/colors/demo.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+# demo as in starlight.png
+# requires truecolor
+
+# for every color:
+# color, bright color | bold color, bright bold color
+
+# low level output coding
+pcol() { printf '%b[%d;2;%d;%d;%dm' '\033' "$1" "$2" "$3" "$4"; }
+pcolx() { pcol "$1" 0x"$2" 0x"$3" 0x"$4"; }
+fg()  { pcol  38 "$@"; }
+fgx() { pcolx 38 "$@"; }
+bg()  { pcol  48 "$@"; }
+bgx() { pcolx 48 "$@"; }
+bold()  { printf '%b[1m' '\033'; }
+reset() { printf '%b[0m' '\033'; }
+
+# logical input processing
+colsep() { echo $* | fold -w2; }
+fgc() { fgx $(colsep $1); }
+bgc() { bgx $(colsep $1); }
+
+# loop
+demopart() {
+	eval fgc '$'"$1"
+	if [ $# -gt 1 ]; then
+		bold
+		printf 'bold '
+	fi
+	# 9 is the length of brmagenta
+	printf '%-9s' "$1"
+	reset
+}
+
+demo() {
+	for col in black red green yellow blue magenta cyan white; do
+		printf '%b %b | %b %b\n' "$(demopart $col)" "$(demopart br$col)" \
+			"$(demopart $col bold)" "$(demopart br$col bold)"
+	done
+}
+
+. ./colors.sh
+demo