X-Git-Url: http://source.jalview.org/gitweb/?p=jalview.git;a=blobdiff_plain;f=src%2Fjalview%2Futil%2FColorUtils.java;h=a2d8d3efb13488796b17fa5eafe61276f9a2c81b;hp=3eb080b0e126c8cdcfa486f4078ff802203da659;hb=0a94254977a8824ad154325a8ccb6d6d1d4e4dec;hpb=5014beeca83ef54a5740388c443d85f532a34db6

diff --git a/src/jalview/util/ColorUtils.java b/src/jalview/util/ColorUtils.java
index 3eb080b..a2d8d3e 100644
--- a/src/jalview/util/ColorUtils.java
+++ b/src/jalview/util/ColorUtils.java
@@ -199,6 +199,42 @@ public class ColorUtils
     }
   }
 
+  public static int bleachColourInt(int colour, float bleachFactor)
+  {
+    if (bleachFactor >= 1f)
+    {
+      return -1;// Color.WHITE;
+    }
+    if (bleachFactor <= -1f)
+    {
+      return 0xFF000000;// Color.BLACK;
+    }
+    if (bleachFactor == 0f)
+    {
+      return colour;
+    }
+
+    int red = (colour >> 16) & 0xFF;// getRed();
+    int green = (colour >> 8) & 0xFF;// colour.getGreen();
+    int blue = colour & 0xFF;// .getBlue();
+
+    if (bleachFactor > 0)
+    {
+      red += (255 - red) * bleachFactor;
+      green += (255 - green) * bleachFactor;
+      blue += (255 - blue) * bleachFactor;
+    }
+    else
+    {
+      float factor = 1 + bleachFactor;
+      red *= factor;
+      green *= factor;
+      blue *= factor;
+    }
+    return 0xFF000000 | (red << 16) | (green << 8) | blue;// new Color(red,
+                                                          // green, blue);
+  }
+
   /**
    * Parses a string into a Color, where the accepted formats are
    * <ul>