Sanitise CropLayer to allow for whole numbers

Former-commit-id: db2e0a2cf401d3ceba936e78438104c2127c4470
Former-commit-id: 15181f0140204d1d17c0df3ccf7fdc6a1a23bab8

src/ImageProcessor.Playground/Program.cs

@@ -81,6 +81,7 @@ namespace ImageProcessor.PlayGround
                     using (ImageFactory imageFactory = new ImageFactory(true))
                     {
                         Size size = new Size(1024, 0);
+                        CropLayer cropLayer = new CropLayer(20, 20, 20, 20, ImageProcessor.Imaging.CropMode.Percentage);
                         //ResizeLayer layer = new ResizeLayer(size, ResizeMode.Max, AnchorPosition.Center, false);
 
                         //ContentAwareResizeLayer layer = new ContentAwareResizeLayer(size)
@@ -110,7 +111,8 @@ namespace ImageProcessor.PlayGround
                             //.DetectEdges(new LaplacianOfGaussianEdgeFilter())
                             //.EntropyCrop()
                             //.Halftone(true)
-                            .RotateBounded(150, false)
+                            //.RotateBounded(150, false)
+                            .Crop(cropLayer)
                             //.Rotate(140)
                             //.Filter(MatrixFilters.Invert)
                             //.Contrast(50)

src/ImageProcessor/Imaging/CropLayer.cs

@@ -21,16 +21,16 @@ namespace ImageProcessor.Imaging
         /// Initializes a new instance of the <see cref="CropLayer"/> class.
         /// </summary>
         /// <param name="left">
-        /// The left coordinate of the crop layer.
+        /// The left coordinate of the crop layer. 
         /// </param>
         /// <param name="top">
-        /// The top coordinate of the crop layer.
+        /// The top coordinate of the crop layer. 
         /// </param>
         /// <param name="right">
-        /// The right coordinate of the crop layer.
+        /// The right coordinate of the crop layer. 
         /// </param>
         /// <param name="bottom">
-        /// The bottom coordinate of the crop layer.
+        /// The bottom coordinate of the crop layer. 
         /// </param>
         /// <param name="cropMode">
         /// The <see cref="CropMode"/>.

src/ImageProcessor/Processors/Crop.cs

@@ -73,6 +73,12 @@ namespace ImageProcessor.Processors
 
                 if (cropLayer.CropMode == CropMode.Percentage)
                 {
+                    // Fix for whole numbers. 
+                    cropLayer.Left = cropLayer.Left > 1 ? cropLayer.Left / 100 : cropLayer.Left;
+                    cropLayer.Right = cropLayer.Right > 1 ? cropLayer.Right / 100 : cropLayer.Right;
+                    cropLayer.Top = cropLayer.Top > 1 ? cropLayer.Top / 100 : cropLayer.Top;
+                    cropLayer.Bottom = cropLayer.Bottom > 1 ? cropLayer.Bottom / 100 : cropLayer.Bottom;
+
                     // Work out the percentages.
                     float left = cropLayer.Left * sourceWidth;
                     float top = cropLayer.Top * sourceHeight;