Added Crop effect

ImageEffectsLib/ImageEffectsForm.cs

@@ -65,6 +65,7 @@ namespace ImageEffectsLib
                 typeof(Background),
                 typeof(BackgroundGradient),
                 typeof(Border),
+                typeof(Crop),
                 typeof(Canvas),
                 typeof(Flip),
                 typeof(Resize),

ImageEffectsLib/ImageEffectsLib.csproj

@@ -93,6 +93,7 @@
     <Compile Include="Adjustments\Hue.cs" />
     <Compile Include="Adjustments\Inverse.cs" />
     <Compile Include="Adjustments\Saturation.cs" />
+    <Compile Include="Manipulations\Crop.cs" />
     <Compile Include="Manipulations\Skew.cs" />
     <Compile Include="Filters\Blur.cs" />
     <Compile Include="Filters\Shadow.cs" />

ImageEffectsLib/Manipulations/Canvas.cs

@@ -24,6 +24,7 @@
 #endregion License Information (GPL v3)
 
 using HelpersLib;
+using System;
 using System.ComponentModel;
 using System.Drawing;
 
@@ -31,10 +32,10 @@ namespace ImageEffectsLib
 {
     internal class Canvas : ImageEffect
     {
-        [DefaultValue(5), Description("If (width = 0) then width = height")]
+        [DefaultValue(5)]
         public int Width { get; set; }
 
-        [DefaultValue(0), Description("If (height = 0) then height = width")]
+        [DefaultValue(5)]
         public int Height { get; set; }
 
         public Canvas()
@@ -46,8 +47,8 @@ namespace ImageEffectsLib
         {
             if (Width <= 0 && Height <= 0) return img;
 
-            int width = Width <= 0 ? Height : Width;
-            int height = Height <= 0 ? Width : Height;
+            int width = Math.Max(Width, 0);
+            int height = Math.Max(Height, 0);
 
             return ImageHelpers.AddCanvas(img, width, height);
         }

ImageEffectsLib/Manipulations/Crop.cs

@@ -0,0 +1,56 @@
+#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (C) 2008-2013 ShareX Developers
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
+*/
+
+#endregion License Information (GPL v3)
+
+using HelpersLib;
+using System;
+using System.ComponentModel;
+using System.Drawing;
+
+namespace ImageEffectsLib
+{
+    internal class Crop : ImageEffect
+    {
+        [DefaultValue(5)]
+        public int Width { get; set; }
+
+        [DefaultValue(5)]
+        public int Height { get; set; }
+
+        public Crop()
+        {
+            this.ApplyDefaultPropertyValues();
+        }
+
+        public override Image Apply(Image img)
+        {
+            if (Width <= 0 && Height <= 0) return img;
+
+            int width = Math.Max(Width, 0);
+            int height = Math.Max(Height, 0);
+
+            return ImageHelpers.CropImage(img, new Rectangle(width, height, img.Width - width * 2, img.Height - height * 2));
+        }
+    }
+}