Fix resizer

Former-commit-id: a30925b4f90f25bd8cbda4d71e43d45198a52d53
Former-commit-id: eb5b8f040d476372cfd3407a39fe9b6accfa659b
Former-commit-id: 83f1e75b1e63c585c83ea2ad836815c4cf0e5c10

src/ImageProcessor/Samplers/ImageSampleExtensions.cs

@@ -12,17 +12,17 @@ namespace ImageProcessor.Samplers
     {
         public static Image Resize(this Image source, int width, int height)
         {
-            return source.Process(width, height, default(Rectangle), default(Rectangle), new Resize(new BicubicResampler(), width, height));
+            return source.Process(width, height, default(Rectangle), default(Rectangle), new Resize(new BicubicResampler()));
         }
 
         public static Image Resize(this Image source, int width, int height, IResampler sampler)
         {
-            return source.Process(width, height, default(Rectangle), default(Rectangle), new Resize(sampler, width, height));
+            return source.Process(width, height, default(Rectangle), default(Rectangle), new Resize(sampler));
         }
 
         public static Image Resize(this Image source, int width, int height, IResampler sampler, Rectangle sourceRectangle, Rectangle targetRectangle)
         {
-            return source.Process(width, height, sourceRectangle, targetRectangle, new Resize(sampler, width, height));
+            return source.Process(width, height, sourceRectangle, targetRectangle, new Resize(sampler));
         }
     }
 }

src/ImageProcessor/Samplers/Resize.cs

@@ -10,15 +10,11 @@ namespace ImageProcessor.Samplers
         /// <param name="sampler">
         /// The sampler to perform the resize operation.
         /// </param>
-        public Resize(IResampler sampler, int width, int height)
+        public Resize(IResampler sampler)
         {
             Guard.NotNull(sampler, nameof(sampler));
-            Guard.MustBeGreaterThan(width, 0, nameof(width));
-            Guard.MustBeGreaterThan(height, 0, nameof(height));
 
             this.Sampler = sampler;
-            this.Width = width;
-            this.Height = height;
         }
 
         /// <summary>
@@ -26,16 +22,6 @@ namespace ImageProcessor.Samplers
         /// </summary>
         public IResampler Sampler { get; }
 
-        /// <summary>
-        /// Gets the width.
-        /// </summary>
-        public int Width { get; }
-
-        /// <summary>
-        /// Gets the height.
-        /// </summary>
-        public int Height { get; }
-
         /// <inheritdoc/>
         protected override void Apply(
             ImageBase target,
@@ -51,6 +37,7 @@ namespace ImageProcessor.Samplers
             int width = target.Width;
             int height = target.Height;
 
+            int targetY = targetRectangle.Y;
             int startX = targetRectangle.X;
             int endX = targetRectangle.Right;
             int right = (int)(this.Sampler.Radius + .5);
@@ -69,7 +56,7 @@ namespace ImageProcessor.Samplers
                 if (y >= 0 && y < height)
                 {
                     // Y coordinates of source points.
-                    double originY = ((startY - targetRectangle.Y) * heightFactor) - 0.5;
+                    double originY = ((y - targetY) * heightFactor) - 0.5;
                     int originY1 = (int)originY;
                     double dy = originY - originY1;
 

tests/ImageProcessor.Tests/Filters/FilterTests.cs

@@ -14,12 +14,12 @@ namespace ImageProcessor.Tests.Filters
     {
         public static readonly List<string> Files = new List<string>
         {
-            //{ "../../TestImages/Formats/Jpg/Backdrop.jpg"},
+            { "../../TestImages/Formats/Jpg/Backdrop.jpg"},
             //{ "../../TestImages/Formats/Bmp/Car.bmp" },
             //{ "../../TestImages/Formats/Png/cmyk.png" },
             //{ "../../TestImages/Formats/Gif/a.gif" },
             //{ "../../TestImages/Formats/Gif/leaf.gif" },
-            { "../../TestImages/Formats/Gif/ani.gif" },
+            //{ "../../TestImages/Formats/Gif/ani.gif" },
             //{ "../../TestImages/Formats/Gif/ani2.gif" },
             //{ "../../TestImages/Formats/Gif/giphy.gif" },
         };