working on new Gif viewer

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimationProvider.cs

@@ -0,0 +1,37 @@
+// Copyright © 2017 Paddy Xu
+// 
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Media.Imaging;
+
+namespace QuickLook.Plugin.ImageViewer.AnimatedImage
+{
+    internal abstract class AnimationProvider
+    {
+        public AnimationProvider(string path)
+        {
+            Path = path;
+        }
+
+        public string Path { get; }
+
+        public Int32Animation Animator { get; protected set; }
+
+        public abstract DrawingImage GetRenderedFrame(int index);
+    }
+}