Allow control on the threshold for using 'distant-foreground'

* src/xfaces.c (NEAR_SAME_COLOR_THRESHOLD): Macro deleted.
(load_face_colors): Compare against
face_near_same_color_threshold instead of
NEAR_SAME_COLOR_THRESHOLD.
(syms_of_xfaces) <face-near-same-color-threshold>: New
variable.  (Bug#34001)

* etc/NEWS: Announce the change.

1 files changed, 7 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 683a4279a35..29ed7ab4819 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -145,6 +145,13 @@ EMACS_SOCKET_NAME environment variable to an appropriate value.
 *** When run by root, emacsclient no longer connects to non-root sockets.
 (Instead you can use Tramp methods to run root commands in a non-root Emacs.)
 
+---
+** Control of the threshold for using the 'distant-foreground' color.
+The threshold for color distance below which the 'distant-foreground'
+color of the face will be used instead of the foreground color can now
+be controlled via the new variable 'face-near-same-color-threshold'.
+The default value is 30000, as the previously hard-coded threshold.
+
 +++
 ** The function 'read-passwd' uses '*' as default character to hide passwords.