From 3b1dc7250ec55f7d17b7e2473391b7b57407517a Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 8 Nov 2016 17:36:56 +1100
Subject: [PATCH] Add comments

---
 src/ImageSharp/Formats/Png/PngDecoderCore.cs | 8 ++++----
 src/ImageSharp/Formats/Png/PngEncoderCore.cs | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/ImageSharp/Formats/Png/PngDecoderCore.cs b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
index deb4ace411..ad5c6a2dc2 100644
--- a/src/ImageSharp/Formats/Png/PngDecoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
@@ -266,9 +266,9 @@ namespace ImageSharp.Formats
         /// </summary>
         /// <typeparam name="TColor">The pixel format.</typeparam>
         /// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
-        /// <param name="pixelData">The pixel data.</param>
-        /// <param name="pixels">The image pixels.</param>
-        private void DecodePixelData<TColor, TPacked>(Stream pixelData, PixelAccessor<TColor, TPacked> pixels)
+        /// <param name="compressedStream">The compressed pixel data stream.</param>
+        /// <param name="pixels">The image pixel accessor.</param>
+        private void DecodePixelData<TColor, TPacked>(Stream compressedStream, PixelAccessor<TColor, TPacked> pixels)
             where TColor : struct, IPackedPixel<TPacked>
             where TPacked : struct
         {
@@ -277,7 +277,7 @@ namespace ImageSharp.Formats
             byte[] scanline = new byte[this.bytesPerScanline];
             for (int y = 0; y < this.header.Height; y++)
             {
-                pixelData.Read(scanline, 0, this.bytesPerScanline);
+                compressedStream.Read(scanline, 0, this.bytesPerScanline);
 
                 FilterType filterType = (FilterType)scanline[0];
                 byte[] defilteredScanline;
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index 9d68ba84a4..f7e79a52c5 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -590,6 +590,7 @@ namespace ImageSharp.Formats
 
         /// <summary>
         /// Writes the pixel information to the stream.
+        /// TODO: This is WHACK! We should be able to do this without creating yet another array. 
         /// </summary>
         /// <param name="stream">The stream.</param>
         private void WriteDataChunks(Stream stream)