update image

Assets/UIWidgets/painting/alignment.cs

         public static readonly Alignment bottomCenter = new Alignment(0.0, 1.0);
         public static readonly Alignment bottomRight = new Alignment(1.0, 1.0);
 
-        // todo more operators
-
         public Alignment resolve(TextDirection direction)
         {
             return this;
         public static bool operator !=(Alignment a, Alignment b)
         {
             return !(a == b);
-        }
-    }
-
-    public class _MixedAlignment : IEquatable<_MixedAlignment>
-    {
-        public _MixedAlignment(double x, double start, double y)
-        {
-            this.x = x;
-            this.start = start;
-            this.y = y;
-        }
-
-        private readonly double x;
-
-        private readonly double start;
-
-        private readonly double y;
-
-
-        public static _MixedAlignment operator -(_MixedAlignment a)
-        {
-            return new _MixedAlignment(
-                -a.x,
-                -a.start,
-                -a.y
-            );
-        }
-
-        public static _MixedAlignment operator *(_MixedAlignment a, double other)
-        {
-            return new _MixedAlignment(
-                a.x * other,
-                a.start * other,
-                a.y * other
-            );
-        }
-
-        public static _MixedAlignment operator /(_MixedAlignment a, double other)
-        {
-            return new _MixedAlignment(
-                a.x / other,
-                a.start / other,
-                a.y / other
-            );
-        }
-
-        public static _MixedAlignment operator %(_MixedAlignment a, double other)
-        {
-            return new _MixedAlignment(
-                a.x % other,
-                a.start % other,
-                a.y % other
-            );
-        }
-
-        public Alignment resolve(TextDirection direction)
-        {
-            switch (direction)
-            {
-                case TextDirection.rtl:
-                    return new Alignment(x - start, y);
-                case TextDirection.ltr:
-                    return new Alignment(x + start, y);
-            }
-
-            return null;
-        }
-
-        public bool Equals(_MixedAlignment other)
-        {
-            if (object.ReferenceEquals(null, other)) return false;
-            if (object.ReferenceEquals(this, other)) return true;
-            return this.x.Equals(other.x) && this.y.Equals(other.y) && this.start.Equals(other.start);
         }
     }
 }

Assets/UIWidgets/painting/box_fit.cs

 {
     public enum BoxFit
     {
-        /// Fill the target box by distorting the source's aspect ratio.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_fill.png)
-
-        /// As large as possible while still containing the source entirely within the
-        /// target box.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_contain.png)
-
-        /// As small as possible while still covering the entire target box.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_cover.png)
-
-        /// Make sure the full width of the source is shown, regardless of
-        /// whether this means the source overflows the target box vertically.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_fitWidth.png)
-
-        /// Make sure the full height of the source is shown, regardless of
-        /// whether this means the source overflows the target box horizontally.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_fitHeight.png)
-
-        /// Align the source within the target box (by default, centering) and discard
-        /// any portions of the source that lie outside the box.
-        ///
-        /// The source image is not resized.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_none.png)
-
-        /// Align the source within the target box (by default, centering) and, if
-        /// necessary, scale the source down to ensure that the source fits within the
-        /// box.
-        ///
-        /// This is the same as `contain` if that would shrink the image, otherwise it
-        /// is the same as `none`.
-        ///
-        /// ![](https://flutter.github.io/assets-for-api-docs/assets/painting/box_fit_scaleDown.png)
         scaleDown,
     }
 
         {
-            //todo wrong
             this.source = source;
             this.destination = destination;
         }

Assets/UIWidgets/painting/image_provider.cs

 
         public override NetworkImage obtainKey(ImageConfiguration configuration)
         {
-//        return new SynchronousFuture<NetworkImage> (this);
             return this;
         }
 

Assets/UIWidgets/ui/painting/image.cs

             this.width = width;
         }
 
-        public byte[] rawData; // todo temp hack
-        public int height; //有别的用吗
+        public byte[] rawData;
+        public int height;
         public int width;
     }
 }

Assets/UIWidgets/ui/painting/painting.cs

             };
         }
     }
-
-//    public class GUICanvas : Canvas {
-//        static GUICanvas() {
-//            GUICanvas.shadowMat = Resources.Load<Material>("UIWidgets_ShadowMat");
-//            if (GUICanvas.shadowMat == null) {
-//                throw new Exception("UIWidgets_ShadowShader not found");
-//            }
-//        }
-//
-//        public static readonly Material shadowMat;
-//
-//        public override void drawPloygon4(Paint paint, params Offset[] points) {
-//            Vector3[] vectors = new Vector3 [points.Length];
-//            for (int i = 0; i < points.Length; i++) {
-//                vectors[i] = points[i].toVector();
-//            }
-//
-//            Handles.DrawSolidRectangleWithOutline(vectors, paint.color.toColor(),
-//                new UnityEngine.Color(0f, 0f, 0f, 0f));
-//        }
-//
-//        public override void drawRect(Paint paint, Rect rect, BorderWidth borderWidth, BorderRadius borderRadius) {
-//            GUI.DrawTexture(rect.toRect(), EditorGUIUtility.whiteTexture, ScaleMode.StretchToFill, true, 0,
-//                paint.color.toColor(), borderWidth.toVector(), borderRadius.toVector());
-//        }
-//
-//        public override void drawRectShadow(Paint paint, Rect rect) {
-//            GUICanvas.shadowMat.SetFloatArray("_Rect", new float[] {
-//                (float) rect.left, (float) rect.top, (float) rect.width, (float) rect.height,
-//            });
-//            GUICanvas.shadowMat.SetFloat("_sigma", (float) paint.blurSigma);
-//
-//            Graphics.DrawTexture(rect.toRect(), EditorGUIUtility.whiteTexture,
-//                new UnityEngine.Rect(0.0f, 0.0f, 1f, 1f), 0, 0, 0, 0, paint.color.toColor(), GUICanvas.shadowMat);
-//        }
-//    }
     
     public class ColorFilter
     {
 
         Color _color;
         BlendMode _blendMode;
-
-//        public static bool operator ==(ColorFilter a, dynamic other) {
-//            if (other is! ColorFilter)
-//                return false;
-//            ColorFilter typedOther = other;
-//            return a._color == typedOther._color &&
-//                   a._blendMode == typedOther._blendMode;
-//        }
     }
     
     public enum BlendMode

Assets/UIWidgets/ui/painting/picture.cs

             } else if (drawCmd is DrawPicture) {
                 var drawPicture = (DrawPicture) drawCmd;
                 this.addPaintBounds(drawPicture.picture.paintBounds);
-            } else if (drawCmd is DrawImageRect)
-            {
-                var drawImageRect = (DrawImageRect) drawCmd;
-                // todo
             } else if (drawCmd is DrawConcat) {
                 this._transform = ((DrawConcat) drawCmd).transform * this._transform;
             } else if (drawCmd is DrawSave) {