From fef1462371b51fb5540817b76d30630868b2a961 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Fri, 21 Aug 2015 10:35:25 -0500
Subject: [PATCH] SWRasterizer: Implemented stencil action 1 (GL_ZERO).

Verified with hwtests.
---
 src/video_core/pica.h         | 2 +-
 src/video_core/rasterizer.cpp | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 6383e5d56..a47dddd75 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -442,7 +442,7 @@ struct Regs {
 
     enum class StencilAction : u32 {
         Keep      = 0,
-
+        Zero      = 1,
         Replace   = 2,
         Increment = 3,
         Decrement = 4,
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index c6557bf1a..25911e0a2 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -220,6 +220,9 @@ static u8 PerformStencilAction(Regs::StencilAction action, u8 old_stencil, u8 re
     case Regs::StencilAction::Keep:
         return old_stencil;
 
+    case Regs::StencilAction::Zero:
+        return 0;
+
     case Regs::StencilAction::Replace:
         return ref;