From c75b20e37d38e5ed1a185a2a85844348bf3e32ce Mon Sep 17 00:00:00 2001
From: lightningterror <18107717+lightningterror@users.noreply.github.com>
Date: Tue, 23 Nov 2021 18:39:16 +0100
Subject: [PATCH] GS-hw: Also disable Blending when AA1 and ABE or PABE are
 both set on lines.

There's no need to blend them since there is no implementation.
---
 pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp  | 6 +++++-
 pcsx2/GS/Renderers/OpenGL/GSRendererOGL.cpp | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp b/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
index 768a4aea75..8b26b0333e 100644
--- a/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
+++ b/pcsx2/GS/Renderers/DX11/GSRendererDX11.cpp
@@ -442,8 +442,12 @@ void GSRendererDX11::EmulateBlending()
 {
 	// Partial port of OGL SW blending. Currently only works for accumulation and non recursive blend.
 
+	// AA1: Don't enable blending on AA1, not yet implemented on hardware mode,
+	// it requires coverage sample so it's safer to turn it off instead.
+	const bool aa1 = PRIM->AA1 && (m_vt.m_primclass == GS_LINE_CLASS);
+
 	// No blending so early exit
-	if (!(PRIM->ABE || m_env.PABE.PABE))
+	if (aa1 || !(PRIM->ABE || m_env.PABE.PABE))
 		return;
 
 	m_om_bsel.abe = 1;
diff --git a/pcsx2/GS/Renderers/OpenGL/GSRendererOGL.cpp b/pcsx2/GS/Renderers/OpenGL/GSRendererOGL.cpp
index 0ca565100c..94bed7d901 100644
--- a/pcsx2/GS/Renderers/OpenGL/GSRendererOGL.cpp
+++ b/pcsx2/GS/Renderers/OpenGL/GSRendererOGL.cpp
@@ -464,8 +464,12 @@ void GSRendererOGL::EmulateBlending(bool& DATE_GL42, bool& DATE_GL45)
 {
 	GSDeviceOGL* dev = (GSDeviceOGL*)m_dev;
 
+	// AA1: Don't enable blending on AA1, not yet implemented on hardware mode,
+	// it requires coverage sample so it's safer to turn it off instead.
+	const bool aa1 = PRIM->AA1 && (m_vt.m_primclass == GS_LINE_CLASS);
+
 	// No blending so early exit
-	if (!(PRIM->ABE || m_env.PABE.PABE))
+	if (aa1 || !(PRIM->ABE || m_env.PABE.PABE))
 	{
 		dev->OMSetBlendState();
 		return;