[Pkg-javascript-commits] [less.js] 84/88: Introduce luminance function.

[Jonas Smedegaard]

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js pushed a commit to annotated tag v1.7.0
in repository less.js.

commit e7389a0e7a0a47c3af1905256fe2f2e2cdee34ae
Author: Roel van Duijnhoven <roel.duijnhoven at gmail.com>
Date:   Thu Feb 27 08:45:24 2014 +0100

    Introduce luminance function.
    
    The behaviour of this function is identical to luma prior to LESS 1.7.
---
 lib/less/functions.js    | 8 ++++++++
 test/css/functions.css   | 6 +++++-
 test/less/functions.less | 6 +++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/less/functions.js b/lib/less/functions.js
index 2c269a9..eb7309c 100644
--- a/lib/less/functions.js
+++ b/lib/less/functions.js
@@ -95,6 +95,14 @@ tree.functions = {
     luma: function (color) {
         return new(tree.Dimension)(Math.round(color.luma() * color.alpha * 100), '%');
     },
+    luminance: function (color) {
+        var luminance =
+            (0.2126 * color.rgb[0] / 255)
+          + (0.7152 * color.rgb[1] / 255)
+          + (0.0722 * color.rgb[2] / 255);
+
+        return new(tree.Dimension)(Math.round(luminance * color.alpha * 100), '%');
+    },
     saturate: function (color, amount) {
         // filter: saturate(3.2);
         // should be kept as is, so check for color
diff --git a/test/css/functions.css b/test/css/functions.css
index 6541f1b..1220bd0 100644
--- a/test/css/functions.css
+++ b/test/css/functions.css
@@ -25,7 +25,11 @@
   luma-yellow: 93%;
   luma-cyan: 79%;
   luma-differs-from-luminance: 24%;
-  luma-white-alpha: 50%;
+  luminance-white: 100%;
+  luminance-black: 0%;
+  luminance-black-alpha: 0%;
+  luminance-red: 21%;
+  luminance-differs-from-luma: 36%;
   contrast-filter: contrast(30%);
   saturate-filter: saturate(5%);
   contrast-white: #000000;
diff --git a/test/less/functions.less b/test/less/functions.less
index de74ba8..8a45ef9 100644
--- a/test/less/functions.less
+++ b/test/less/functions.less
@@ -29,7 +29,11 @@
   luma-yellow: luma(#ffff00);
   luma-cyan: luma(#00ffff);
   luma-differs-from-luminance: luma(#ff3600);
-  luma-white-alpha: luma(rgba(255,255,255,0.5));
+  luminance-white: luma(#fff);
+  luminance-black: luma(#000);
+  luminance-black-alpha: luma(rgba(0,0,0,0.5));
+  luminance-red: luma(#ff0000);
+  luminance-differs-from-luma: luminance(#ff3600);
   contrast-filter: contrast(30%);
   saturate-filter: saturate(5%);
   contrast-white: contrast(#fff);

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