(xterm-rgb-convert-to-16bit): Simplify.

(xterm-register-default-colors): Update color values computation
to match xterm-200.

2 files changed, 12 insertions, 5 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d569e9a0163..5f6731885d9 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2005-04-09  Dan Nicolaescu  <dann@ics.uci.edu>
+
+        * term/xterm.el (xterm-rgb-convert-to-16bit): Simplify.
+        (xterm-register-default-colors): Update color values computation
+        to match xterm-200.
+
 2005-04-09  Kenichi Handa  <handa@m17n.org>
 
         * international/code-pages.el (iso-latin-7): Fix the map.
diff --git a/lisp/term/xterm.el b/lisp/term/xterm.el
index 44688e82b6d..b62f6efd478 100644
--- a/lisp/term/xterm.el
+++ b/lisp/term/xterm.el
@@ -123,7 +123,7 @@
 
 (defun xterm-rgb-convert-to-16bit (prim)
   "Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
-  (min 65535 (round (* (/ prim 255.0) 65535.0))))
+  (logior prim (lsh prim 8)))
 
 (defun xterm-register-default-colors ()
   "Register the default set of colors for xterm or compatible emulator.
@@ -160,9 +160,10 @@ versions of xterm."
             (tty-color-define (format "color-%d" (- 256 ncolors))
                               (- 256 ncolors)
                               (mapcar 'xterm-rgb-convert-to-16bit
-                                      (list (round (* r 42.5))
-                                            (round (* g 42.5))
-                                            (round (* b 42.5)))))
+                                      (list (if (zerop r) 0 (+ (* r 40) 55))
+                                            (if (zerop g) 0 (+ (* g 40) 55))
+                                            (if (zerop b) 0 (+ (* b 40) 55)))))
+
             (setq b (1+ b))
             (if (> b 5)
                 (setq g (1+ g)
@@ -200,7 +201,7 @@ versions of xterm."
         ;; Now the 8 gray colors
         (while (> ncolors 0)
           (setq color (xterm-rgb-convert-to-16bit
-                       (round
+                       (floor
                         (if (= ncolors 8)
                             46.36363636
                           (+ (* (- 8 ncolors) 23.18181818) 69.54545454)))))