Add full support for Gem color icons.

exeinfogui/GEM/GemColorIcon.cs

@@ -0,0 +1,19 @@
+using Eto.Drawing;
+
+namespace exeinfogui.GEM
+{
+    public static class GemColorIcon
+    {
+        public static Bitmap GemColorIconToEto(libexeinfo.GEM.ColorIconPlane icon, int width, int height, bool selected)
+        {
+            if(selected && icon.SelectedData == null) return null;
+
+            byte[] data = selected ? icon.SelectedData : icon.Data;
+            byte[] mask = selected ? icon.SelectedMask : icon.Mask;
+
+            int[] pixels = libexeinfo.GEM.PlaneToRaster(data, mask, width, height, icon.Planes);
+
+            return new Bitmap(width, height, PixelFormat.Format32bppRgba, pixels);
+        }
+    }
+}