From 6dfb6a8023932e0c488b40c87e94b276e26e0b62 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Tue, 15 Nov 2016 16:47:03 +1100
Subject: [PATCH] Use optimized write CopyTo for png encoding

---
 src/ImageSharp/Formats/Png/PngEncoderCore.cs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
index bca1d0033f..ab6d09348c 100644
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -317,8 +317,7 @@ namespace ImageSharp.Formats
             where TPacked : struct
         {
             // We can use the optimized PixelAccessor here and copy the bytes in unmanaged memory.
-            int bpp = this.bytesPerPixel;
-            using (PixelRow<TColor, TPacked> pixelRow = new PixelRow<TColor, TPacked>(this.width, rawScanline, bpp == 4 ? ComponentOrder.XYZW : ComponentOrder.XYZ))
+            using (PixelRow<TColor, TPacked> pixelRow = new PixelRow<TColor, TPacked>(this.width, rawScanline, this.bytesPerPixel == 4 ? ComponentOrder.XYZW : ComponentOrder.XYZ))
             {
                 pixels.CopyTo(pixelRow, row);
             }