X-Git-Url: http://git.linex4red.de/pub/Android/ownCloud.git/blobdiff_plain/5f2820355d53973f8c577516533fca069464a58b..c20041d157baebede8e47a5f6837ba7dd51204f7:/src/com/owncloud/android/utils/BitmapUtils.java

diff --git a/src/com/owncloud/android/utils/BitmapUtils.java b/src/com/owncloud/android/utils/BitmapUtils.java
index 7b9382e6..7af6960f 100644
--- a/src/com/owncloud/android/utils/BitmapUtils.java
+++ b/src/com/owncloud/android/utils/BitmapUtils.java
@@ -178,6 +178,46 @@ public class BitmapUtils {
     }
 
     /**
+     * Converts an HSL color value to RGB. Conversion formula
+     * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
+     * Assumes h, s, and l are contained in the set [0, 1] and
+     * returns r, g, and b in the set [0, 255].
+     * from: http://axonflux.com/handy-rgb-to-hsl-and-rgb-to-hsv-color-model-c
+     *
+     * @param   integer  h       The hue
+     * @param   Integer  s       The saturation
+     * @param   Integer  l       The lightness
+     * @return  Array           The RGB representation
+     */
+    public static int[] hslToRgb(Double h, Double s, Double l){
+        Double r, g, b;
+
+        if(s == 0){
+            r = g = b = l; // achromatic
+        } else {
+            Double q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+            Double p = 2 * l - q;
+            r = hue2rgb(p, q, h + 1/3) * 255;
+            g = hue2rgb(p, q, h) * 255;
+            b = hue2rgb(p, q, h - 1/3) * 255;
+        }
+
+
+        int[] array = {r.intValue(), g.intValue(), b.intValue()};
+        return array;
+    }
+
+    private static Double hue2rgb(Double p, Double q, Double t){
+        if(t < 0) t += 1;
+        if(t > 1) t -= 1;
+        if(t < 1/6) return p + (q - p) * 6 * t;
+        if(t < 1/2) return q;
+        if(t < 2/3) return p + (q - p) * (2/3 - t) * 6;
+        return p;
+    }
+    
+
+    /**
      * Checks if file passed is an image
      * @param file
      * @return true/false