添加项目文件。

WpfAnimatedGif/Decoding/GifImageData.cs

@@ -0,0 +1,27 @@
+using System.IO;
+
+namespace WpfAnimatedGif.Decoding
+{
+    internal class GifImageData
+    {
+        public byte LzwMinimumCodeSize { get; set; }
+        public byte[] CompressedData { get; set; }
+
+        private GifImageData()
+        {
+        }
+
+        internal static GifImageData ReadImageData(Stream stream, bool metadataOnly)
+        {
+            var imgData = new GifImageData();
+            imgData.Read(stream, metadataOnly);
+            return imgData;
+        }
+
+        private void Read(Stream stream, bool metadataOnly)
+        {
+            LzwMinimumCodeSize = (byte)stream.ReadByte();
+            CompressedData = GifHelpers.ReadDataBlocks(stream, metadataOnly);
+        }
+    }
+}