Ensure quality is carried across.

Former-commit-id: 6069f3358b046e27a7aa3e56ac8a11cb6684b7e7
Former-commit-id: 34bf7b98f19e05db77daa5b7fc57020c3e563b08
Former-commit-id: 0b28b45eaa0450d775062c0be210856c57d96e7f

src/ImageProcessorCore/Formats/Png/PngEncoderCore.cs

@@ -27,11 +27,6 @@ namespace ImageProcessorCore.Formats
         /// </summary>
         private byte bitDepth;
 
-        /// <summary>
-        /// The quantized image result.
-        /// </summary>
-        //private QuantizedImage<T,P> quantized;
-
         /// <summary>
         /// Gets or sets the quality of output for images.
         /// </summary>
@@ -237,7 +232,10 @@ namespace ImageProcessorCore.Formats
             int colorTableLength = (int)Math.Pow(2, header.BitDepth) * 3;
             byte[] colorTable = new byte[colorTableLength];
 
-            Parallel.For(0, pixelCount,
+            Parallel.For(
+                0, 
+                pixelCount,
+                Bootstrapper.Instance.ParallelOptions,
                 i =>
                 {
                     int offset = i * 3;
@@ -337,7 +335,7 @@ namespace ImageProcessorCore.Formats
                 Parallel.For(
                     0,
                     imageHeight,
-                    //Bootstrapper.Instance.ParallelOptions,
+                    Bootstrapper.Instance.ParallelOptions,
                     y =>
                 {
                     int dataOffset = (y * rowLength);

src/ImageProcessorCore/Image/Image.cs

@@ -85,6 +85,7 @@ namespace ImageProcessorCore
                 }
             }
 
+            this.Quality = other.Quality;
             this.RepeatCount = other.RepeatCount;
             this.HorizontalResolution = other.HorizontalResolution;
             this.VerticalResolution = other.VerticalResolution;

src/ImageProcessorCore/Image/ImageExtensions.cs

@@ -154,6 +154,7 @@ namespace ImageProcessorCore
                 {
                     // Several properties require copying
                     // TODO: Check why we need to set these?
+                    Quality = source.Quality,
                     HorizontalResolution = source.HorizontalResolution,
                     VerticalResolution = source.VerticalResolution,
                     CurrentImageFormat = source.CurrentImageFormat,