Add unix/term-truecolor.sh to test true color support

1 files changed, 19 insertions, 0 deletions

diff --git a/unix/term-truecolor.sh b/unix/term-truecolor.sh
new file mode 100755
index 0000000..953e6f1
--- /dev/null
+++ b/unix/term-truecolor.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# Check true color support in terminal.
+# Credit: https://gist.github.com/XVilka/8346728
+#
+
+awk 'BEGIN{
+    s="/\\/\\/\\/\\/\\"; s=s s s s s s s s;
+    for (colnum = 0; colnum<77; colnum++) {
+        r = 255-(colnum*255/76);
+        g = (colnum*510/76);
+        b = (colnum*255/76);
+        if (g>255) g = 510-g;
+        printf "\033[48;2;%d;%d;%dm", r,g,b;
+        printf "\033[38;2;%d;%d;%dm", 255-r,255-g,255-b;
+        printf "%s\033[0m", substr(s,colnum+1,1);
+    }
+    printf "\n";
+}'