update cache

Assets/UIWidgets/painting/decoration_image.cs

     public static class DecorationImageUtil
     {
         public static void paintImage(Canvas canvas, Rect rect, ui.Image image, BoxFit fit, Rect centerSlice, Alignment alignment = null,
-            ImageRepeat repeat = ImageRepeat.noRepeat, bool flipHorizontally = false) // todo more parameters
+            ImageRepeat repeat = ImageRepeat.noRepeat, bool flipHorizontally = false) 
         {
             if (rect.isEmpty)
                 return;
             double dy = halfHeightDelta + alignment.y * halfHeightDelta;
             Offset destinationPosition = rect.topLeft.translate(dx, dy);
             Rect destinationRect = destinationPosition & destinationSize;
-            // todo repeat and flip
-//            bool needSave = repeat != ImageRepeat.noRepeat || flipHorizontally;
-//            if (needSave)
-//                canvas.save();
-//            if (repeat != ImageRepeat.noRepeat)
-//                canvas.clipRect(rect);
+            bool needSave = repeat != ImageRepeat.noRepeat || flipHorizontally;
+            if (needSave)
+                canvas.save();
+            if (repeat != ImageRepeat.noRepeat)
+                canvas.clipRect(rect);
+            // todo flip
 //            if (flipHorizontally) {
 //                dx = -(rect.left + rect.width / 2.0);
 //                canvas.translate(-dx, 0.0);
                     fittedSizes.source, Offset.zero & inputSize
                 );
                 foreach (Rect tileRect in _generateImageTileRects(rect, destinationRect, repeat)) {
-//                    canvas.drawImageRect(sourceRect, tileRect, paint, image);
+                    canvas.drawImageRect(sourceRect, tileRect, paint, image);
                 }
             } else {
                 // todo
                 }
             }
-//            if (needSave)
-//                canvas.restore();
+            if (needSave)
+                canvas.restore();
         }
 
         public static List<Rect> _generateImageTileRects(Rect outputRect, Rect fundamentalRect,
             {
                 for (int j = startY; j <= stopY; ++j)
                     tileRects.Add(fundamentalRect.shift(new Offset(i * strideX, j * strideY)));
-//                        yield return fundamentalRect.shift(new Offset(i * strideX, j * strideY));
             }
 
             return tileRects;

Assets/UIWidgets/painting/image_cache.cs

 using System.Collections.Generic;
-using System.Runtime.CompilerServices;
-using UnityEngine;
 using Object = System.Object;
 
 namespace UIWidgets.painting
 
         public delegate ImageStreamCompleter Loader();
 
-        [MethodImpl(MethodImplOptions.Synchronized)]
         public ImageStreamCompleter putIfAbsent(Object key, Loader loader)
         {
             ImageStreamCompleter result;

Assets/UIWidgets/painting/image_provider.cs

 {
     public abstract class ImageProvider<T>
     {
-//        ImageStream resolve(ImageConfiguration configuration) {
         public ImageStream resolve(ImageConfiguration configuration)
         {
             ImageStream stream = new ImageStream();
         public override string ToString()
         {
             return "NetworkImage with Url: " + this.url;
+        }
+        
+        public bool Equals(NetworkImage other) {
+            return this.url.Equals(other.url) && this.scale.Equals(other.scale);
+        }
+
+        public override bool Equals(object obj) {
+            if (object.ReferenceEquals(null, obj)) return false;
+            if (object.ReferenceEquals(this, obj)) return true;
+            return obj is NetworkImage && this.Equals((NetworkImage) obj);
+        }
+        
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.url.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.scale.GetHashCode();
+                return hashCode;
+            }
         }
     }