Account for negative strides on DMA copy (#2623)

* Account for negative strides on DMA copy

* Should account for non-zero Y

1 files changed, 4 insertions, 3 deletions

diff --git a/Ryujinx.Graphics.Texture/OffsetCalculator.cs b/Ryujinx.Graphics.Texture/OffsetCalculator.cs
index dd4b6e7f..d7472e2f 100644
--- a/Ryujinx.Graphics.Texture/OffsetCalculator.cs
+++ b/Ryujinx.Graphics.Texture/OffsetCalculator.cs
@@ -1,4 +1,5 @@
 using Ryujinx.Common;
+using System;
 using System.Runtime.CompilerServices;
 using static Ryujinx.Graphics.Texture.BlockLinearConstants;
 
@@ -111,9 +112,9 @@ namespace Ryujinx.Graphics.Texture
         {
             if (_isLinear)
             {
-                int start = y * _stride + x * _bytesPerPixel;
-                int end = (y + height - 1) * _stride + (x + width) * _bytesPerPixel;
-                return (start, end - start);
+                int start = y * Math.Abs(_stride) + x * _bytesPerPixel;
+                int end = (y + height - 1) * Math.Abs(_stride) + (x + width) * _bytesPerPixel;
+                return (y * _stride + x * _bytesPerPixel, end - start);
             }
             else
             {