Fast case PremultiplyAlpha for opaque colors.

2015-05-29 19:50:33 +01:00
parent 4c72b0066c
commit 1a89e91630
1 changed files with 2 additions and 0 deletions
--- a/OpenRA.Game/Graphics/Util.cs
+++ b/OpenRA.Game/Graphics/Util.cs
@@ -114,6 +114,8 @@ namespace OpenRA.Graphics

 		public static Color PremultiplyAlpha(Color c)
 		{
+			if (c.A == byte.MaxValue)
+				return c;
 			var a = c.A / 255f;
 			return Color.FromArgb(c.A, (byte)(c.R * a + 0.5f), (byte)(c.G * a + 0.5f), (byte)(c.B * a + 0.5f));
 		}