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Diffstat (limited to 'module/output/general.scm')
-rw-r--r-- | module/output/general.scm | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/module/output/general.scm b/module/output/general.scm deleted file mode 100644 index 2e0e77c6..00000000 --- a/module/output/general.scm +++ /dev/null @@ -1,22 +0,0 @@ -(define-module (output general) - ) - -;; Returns a color with good contrast to the given background color. -;; https://stackoverflow.com/questions/1855884/determine-font-color-based-on-background-color/1855903#1855903 -(define-public (calculate-fg-color c) - (catch #t - (lambda () - (define (str->num c n) (string->number (substring/shared c n (+ n 2)) 16)) - ;; (format (current-error-port) "COLOR = ~s~%" c) - (let ((r (str->num c 1)) - (g (str->num c 3)) - (b (str->num c 5))) - (if (< 1/2 (/ (+ (* 0.299 r) - (* 0.587 g) - (* 0.114 b)) - #xFF)) - "#000000" "#FFFFFF"))) - (lambda args - (format (current-error-port) "Error calculating foreground color?~%~s~%" args) - "#FF0000" - ))) |