From a63ab2444733ffd039f4609982256142cf724600 Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Fri, 26 May 2017 04:00:15 +0200
Subject: fix crapoed shadows

---
 src/GPU3D_Soft.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/GPU3D_Soft.cpp')

diff --git a/src/GPU3D_Soft.cpp b/src/GPU3D_Soft.cpp
index d022e8a..fe97b5f 100644
--- a/src/GPU3D_Soft.cpp
+++ b/src/GPU3D_Soft.cpp
@@ -38,6 +38,7 @@ u32 AttrBuffer[256*192];
 // bit30: translucent flag
 
 u8 StencilBuffer[256*2];
+bool PrevIsShadowMask;
 
 // threading
 
@@ -84,6 +85,8 @@ void Reset()
     memset(DepthBuffer, 0, 256*192 * 4);
     memset(AttrBuffer, 0, 256*192 * 4);
 
+    PrevIsShadowMask = false;
+
     // TODO: make it configurable
     if (!RenderThreadRunning)
     {
@@ -803,9 +806,11 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
     else
         fnDepthTest = DepthTest<false>;
 
-    if (polygon->ClearStencil)
+    if (polygon->IsShadowMask && !PrevIsShadowMask)
         memset(&StencilBuffer[256 * (y&0x1)], 0, 256);
 
+    PrevIsShadowMask = polygon->IsShadowMask;
+
     if (polygon->YTop != polygon->YBottom)
     {
         if (y >= polygon->Vertices[rp->NextVL]->FinalPosition[1] && rp->CurVL != polygon->VBottom)
-- 
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