From b0c6d73978e8f3f9a394d30764f481d8993b0b35 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Wed, 30 Jun 2021 20:09:53 +0200
Subject: [PATCH] Convert pixels to bgra with ToBgra32Bytes

---
 src/ImageSharp/Formats/WebP/Lossless/Vp8LEncoder.cs | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/src/ImageSharp/Formats/WebP/Lossless/Vp8LEncoder.cs b/src/ImageSharp/Formats/WebP/Lossless/Vp8LEncoder.cs
index 739529831c..dab1065247 100644
--- a/src/ImageSharp/Formats/WebP/Lossless/Vp8LEncoder.cs
+++ b/src/ImageSharp/Formats/WebP/Lossless/Vp8LEncoder.cs
@@ -7,7 +7,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
-
+using System.Runtime.InteropServices;
 using SixLabors.ImageSharp.Formats.Webp.BitWriter;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
@@ -341,17 +341,12 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossless
             where TPixel : unmanaged, IPixel<TPixel>
         {
             Span<uint> bgra = this.Bgra.GetSpan();
-            using IMemoryOwner<Bgra32> bgraRowBuffer = this.memoryAllocator.Allocate<Bgra32>(width);
-            Span<Bgra32> bgraRow = bgraRowBuffer.GetSpan();
-            int idx = 0;
+            Span<byte> bgraBytes = MemoryMarshal.Cast<uint, byte>(bgra);
+            int widthBytes = width * 4;
             for (int y = 0; y < height; y++)
             {
                 Span<TPixel> rowSpan = image.GetPixelRowSpan(y);
-                PixelOperations<TPixel>.Instance.ToBgra32(this.configuration, rowSpan, bgraRow);
-                for (int x = 0; x < width; x++)
-                {
-                    bgra[idx++] = bgraRow[x].PackedValue;
-                }
+                PixelOperations<TPixel>.Instance.ToBgra32Bytes(this.configuration, rowSpan, bgraBytes.Slice(y * widthBytes, widthBytes), width);
             }
         }