Adding preset resize restrictions

Fixes #31


Former-commit-id: 441439e6e59f04af142613c7661675830f41e613

src/ImageProcessor/Processors/Resize.cs

@@ -356,7 +356,7 @@ namespace ImageProcessor.Processors
                     bool reject = true;
                     foreach (Size restrictedSize in restrictedSizes)
                     {
-                        if (restrictedSize.Width == width || restrictedSize.Height == height)
+                        if (restrictedSize.Width == width && restrictedSize.Height == height)
                         {
                             reject = false;
                         }
@@ -593,8 +593,14 @@ namespace ImageProcessor.Processors
         /// </returns>
         private List<Size> ParseRestrictions(string input)
         {
-            string[] splitInput = input.Split(',');
-            return splitInput.Select(this.ParseSize).ToList();
+            List<Size> sizes = new List<Size>();
+
+            if (!string.IsNullOrWhiteSpace(input))
+            {
+                sizes.AddRange(input.Split(',').Select(this.ParseSize));
+            }
+
+            return sizes;
         }
     }
 }

src/TestWebsites/NET45/Test_Website_NET45/config/imageprocessor/processing.config

@@ -30,6 +30,7 @@
       <settings>
         <setting key="MaxWidth" value="3000"/>
         <setting key="MaxHeight" value="3000"/>
+        <!--<setting key="RestrictTo" value="width=300height=300,width=300height=300"/>-->
       </settings>
     </plugin>
     <plugin name="Rotate" type="ImageProcessor.Processors.Rotate, ImageProcessor"/>