From 390f3f13ba39d4b1208bd64ed6fba57bf64e5691 Mon Sep 17 00:00:00 2001
From: Jules Blok <jules.blok@gmail.com>
Date: Mon, 21 Aug 2017 16:08:32 +0200
Subject: [PATCH] RenderState: Fix incorrect blending factors when removing the
 color usage.

---
 Source/Core/VideoCommon/RenderState.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Source/Core/VideoCommon/RenderState.cpp b/Source/Core/VideoCommon/RenderState.cpp
index 696574f109..7e6d845ccb 100644
--- a/Source/Core/VideoCommon/RenderState.cpp
+++ b/Source/Core/VideoCommon/RenderState.cpp
@@ -94,9 +94,10 @@ void BlendingState::Generate(const BPMemory& bp)
       srcfactor = RemoveDstAlphaUsage(srcfactor);
       dstfactor = RemoveDstAlphaUsage(dstfactor);
     }
-    // replaces SRCCLR with SRCALPHA
-    srcfactoralpha = RemoveSrcColorUsage(srcfactor);
-    dstfactoralpha = RemoveDstColorUsage(dstfactor);
+    // replaces SRCCLR with SRCALPHA and DSTCLR with DSTALPHA, it is important to
+    // use the dst function for the src factor and vice versa
+    srcfactoralpha = RemoveDstColorUsage(srcfactor);
+    dstfactoralpha = RemoveSrcColorUsage(dstfactor);
 
     if (dstalpha)
     {