From 240ddbda57d480176f71f0c6d76c5200930a60f1 Mon Sep 17 00:00:00 2001
From: narzoul <narzoul@users.noreply.github.com>
Date: Tue, 12 Jan 2021 21:06:32 +0100
Subject: [PATCH] Discard invalid bits from D3DDDIRS_WRAP render state values

Fixes rendering issues in Thief 2 on Intel GMA 3600 (issue #81).
---
 DDrawCompat/D3dDdi/DeviceState.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/DDrawCompat/D3dDdi/DeviceState.cpp b/DDrawCompat/D3dDdi/DeviceState.cpp
index 54f4777..5789793 100644
--- a/DDrawCompat/D3dDdi/DeviceState.cpp
+++ b/DDrawCompat/D3dDdi/DeviceState.cpp
@@ -98,6 +98,12 @@ namespace D3dDdi
 
 	HRESULT DeviceState::pfnSetRenderState(const D3DDDIARG_RENDERSTATE* data)
 	{
+		if (data->State >= D3DDDIRS_WRAP0 && data->State <= D3DDDIRS_WRAP7)
+		{
+			auto d = *data;
+			d.Value &= D3DWRAPCOORD_0 | D3DWRAPCOORD_1 | D3DWRAPCOORD_2 | D3DWRAPCOORD_3;
+			return setStateArray(&d, m_renderState, m_device.getOrigVtable().pfnSetRenderState);
+		}
 		return setStateArray(data, m_renderState, m_device.getOrigVtable().pfnSetRenderState);
 	}