From 24c42ae2d90bcd0a77fac18098ceadbc2ce808a3 Mon Sep 17 00:00:00 2001
From: lightningterror <18107717+lightningterror@users.noreply.github.com>
Date: Sun, 26 Feb 2023 22:01:03 +0100
Subject: [PATCH] GS-hw: Replace alpha factor/alpha source1 with source 1
 color.

Output 1 will be used since we want to modify each color channel based on overflow value.
---
 pcsx2/GS/Renderers/HW/GSRendererHW.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pcsx2/GS/Renderers/HW/GSRendererHW.cpp b/pcsx2/GS/Renderers/HW/GSRendererHW.cpp
index 7d26a2f117..2b01cfb752 100644
--- a/pcsx2/GS/Renderers/HW/GSRendererHW.cpp
+++ b/pcsx2/GS/Renderers/HW/GSRendererHW.cpp
@@ -3154,6 +3154,12 @@ void GSRendererHW::EmulateBlending(bool& DATE_PRIMID, bool& DATE_BARRIER, bool&
 			}
 			else if (blend_mix2)
 			{
+				// Allow to compensate when Cs*(Alpha + 1) overflows, to compensate we change
+				// the alpha output value for Cd*Alpha.
+				m_conf.blend = {true, GSDevice::CONST_ONE, GSDevice::SRC1_COLOR, blend.op, false, 0};
+				m_conf.ps.clr_hw = 3;
+				m_conf.ps.no_color1 = false;
+
 				m_conf.ps.blend_a = 0;
 				m_conf.ps.blend_b = 2;
 				m_conf.ps.blend_d = 0;