From e6b1e1948e38ffead23626463e8e9b0644ffba0e Mon Sep 17 00:00:00 2001
From: lightningterror <18107717+lightningterror@users.noreply.github.com>
Date: Tue, 7 Dec 2021 15:01:34 +0100
Subject: [PATCH] GS-d3d11: Add a condition to not enable blend_mix if sw
 blending is already enabled.

Not yet needed but will be useful for sw blending when prims don't overlap.
---
 pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp b/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
index 59fef1052c..68fb8d5ed8 100644
--- a/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
+++ b/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
@@ -467,7 +467,7 @@ void GSRendererDX11::EmulateBlending(u8& afix)
 	const bool blend_mix1 = !!(blend_flag & BLEND_MIX1);
 	const bool blend_mix2 = !!(blend_flag & BLEND_MIX2);
 	const bool blend_mix3 = !!(blend_flag & BLEND_MIX3);
-	const bool blend_mix  = (blend_mix1 || blend_mix2 || blend_mix3)
+	bool blend_mix = (blend_mix1 || blend_mix2 || blend_mix3)
 		// Do not enable if As > 128 or F > 128, hw blend clamps to 1
 		&& !((ALPHA.C == 0 && m_vt.m_alpha.max > 128) || (ALPHA.C == 2 && ALPHA.FIX > 128u));
 
@@ -477,12 +477,19 @@ void GSRendererDX11::EmulateBlending(u8& afix)
 		case ACC_BLEND_HIGH_D3D11:
 		case ACC_BLEND_MEDIUM_D3D11:
 		case ACC_BLEND_BASIC_D3D11:
-			sw_blending |= accumulation_blend || blend_non_recursive || blend_mix;
+			sw_blending |= accumulation_blend || blend_non_recursive;
 			[[fallthrough]];
 		default:
 			break;
 	}
 
+	// Do not run BLEND MIX if sw blending is already present, it's less accurate
+	if (m_sw_blending)
+	{
+		blend_mix &= !sw_blending;
+		sw_blending |= blend_mix;
+	}
+
 	// Color clip
 	if (m_env.COLCLAMP.CLAMP == 0)
 	{