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diff --git a/Tests/TestApp/src/TestDepthStencilState.cpp b/Tests/TestApp/src/TestDepthStencilState.cpp
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+++ b/Tests/TestApp/src/TestDepthStencilState.cpp
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+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+// EngineSandbox.cpp : Defines the entry point for the application.
+//
+
+#include "pch.h"
+#include "TestDepthStencilState.h"
+#include "ConvenienceFunctions.h"
+
+using namespace Diligent;
+
+void TestDepthStencilState::CreateTestDSS( DepthStencilStateDesc &DSSDesc )
+{
+    RefCntAutoPtr<IPipelineState> pPSO;
+    m_pDevice->CreatePipelineState( m_PSODesc, &pPSO );
+    m_pDeviceContext->SetPipelineState( pPSO );
+#if 0
+    DSSDesc.Name = "TestDSS2";
+    m_pDevice->CreateDepthStencilState( DSSDesc, &pDSState2 );
+    assert( pDSState == pDSState2 );
+    m_pDeviceContext->SetDepthStencilState( pDSState );
+    m_pDeviceContext->SetDepthStencilState( pDSState2 );
+    m_pDeviceContext->SetDepthStencilState( pDSState2, 2 );
+#endif
+}
+
+TestDepthStencilState::TestDepthStencilState( IRenderDevice *pDevice, IDeviceContext *pContext ) :
+    TestPipelineStateBase(pDevice),
+    m_pDeviceContext(pContext)
+{
+    DepthStencilStateDesc &DSSDesc = m_PSODesc.GraphicsPipeline.DepthStencilDesc;
+
+    DSSDesc.DepthEnable = False;
+    DSSDesc.DepthWriteEnable = False;
+    CreateTestDSS( DSSDesc );
+
+    DSSDesc.DepthEnable = True;
+    CreateTestDSS( DSSDesc );
+
+    DSSDesc.DepthWriteEnable = True;
+    CreateTestDSS( DSSDesc );
+
+    for( auto CmpFunc = COMPARISON_FUNC_UNKNOWN + 1; CmpFunc < COMPARISON_FUNC_NUM_FUNCTIONS; ++CmpFunc )
+    {
+        DSSDesc.DepthFunc = static_cast<COMPARISON_FUNCTION>(CmpFunc);
+        CreateTestDSS( DSSDesc );
+    }
+
+    DSSDesc.StencilEnable = True;
+    CreateTestDSS( DSSDesc );
+
+    DSSDesc.StencilReadMask = 0xA9;
+    CreateTestDSS( DSSDesc );
+
+    DSSDesc.StencilWriteMask = 0xB8;
+    CreateTestDSS( DSSDesc );
+
+    for( int Face = 0; Face < 2; ++Face )
+    {
+        auto &FaceOp = Face == 0 ? DSSDesc.FrontFace : DSSDesc.BackFace;
+        for( auto StOp = STENCIL_OP_UNDEFINED + 1; StOp < STENCIL_OP_NUM_OPS; ++StOp )
+        {
+            FaceOp.StencilFailOp = static_cast<STENCIL_OP>(StOp);
+            CreateTestDSS( DSSDesc );
+        }
+
+        for( auto StOp = STENCIL_OP_UNDEFINED + 1; StOp < STENCIL_OP_NUM_OPS; ++StOp )
+        {
+            FaceOp.StencilDepthFailOp = static_cast<STENCIL_OP>(StOp);
+            CreateTestDSS( DSSDesc );
+        }
+
+        for( auto StOp = STENCIL_OP_UNDEFINED + 1; StOp < STENCIL_OP_NUM_OPS; ++StOp )
+        {
+            FaceOp.StencilPassOp = static_cast<STENCIL_OP>(StOp);
+            CreateTestDSS( DSSDesc );
+        }
+
+        for( auto CmpFunc = COMPARISON_FUNC_UNKNOWN + 1; CmpFunc < COMPARISON_FUNC_NUM_FUNCTIONS; ++CmpFunc )
+        {
+            FaceOp.StencilFunc = static_cast<COMPARISON_FUNCTION>(CmpFunc);
+            CreateTestDSS( DSSDesc );
+        }
+    }
+
+    auto pScript = CreateRenderScriptFromFile( "DepthStencilStateTest.lua", pDevice, pContext, [&]( Diligent::ScriptParser *pScriptParser )
+    {
+        DSSDesc = DepthStencilStateDesc();
+        DSSDesc.DepthEnable = True;
+        DSSDesc.DepthWriteEnable = True;
+        DSSDesc.DepthFunc = COMPARISON_FUNC_NEVER;
+        DSSDesc.StencilEnable = True;
+        DSSDesc.StencilReadMask = 0xFA;
+        DSSDesc.StencilWriteMask = 0xFF;
+
+        DSSDesc.FrontFace.StencilFailOp = STENCIL_OP_DECR_SAT;
+        DSSDesc.FrontFace.StencilDepthFailOp = STENCIL_OP_DECR_WRAP;
+        DSSDesc.FrontFace.StencilPassOp = STENCIL_OP_INCR_WRAP;
+        DSSDesc.FrontFace.StencilFunc = COMPARISON_FUNC_NOT_EQUAL;
+
+        DSSDesc.BackFace.StencilFailOp = STENCIL_OP_INVERT;
+        DSSDesc.BackFace.StencilDepthFailOp = STENCIL_OP_REPLACE;
+        DSSDesc.BackFace.StencilPassOp = STENCIL_OP_INCR_SAT;
+        DSSDesc.BackFace.StencilFunc = COMPARISON_FUNC_EQUAL;
+        RefCntAutoPtr<IPipelineState> pPSO;
+        pDevice->CreatePipelineState( m_PSODesc, &pPSO );
+        pScriptParser->SetGlobalVariable( "TestGlobalPSO", pPSO );
+    }
+    );
+
+    {
+        RefCntAutoPtr<IPipelineState> pPSOFromScript, pDSStateFromScript2;
+        pScript->GetPipelineStateByName( "TestPSO", &pPSOFromScript);
+        //pScript->GetDepthStencilStateByName( "TestDSS2", &pDSStateFromScript2 );
+        //assert( pDSStateFromScript == pDSStateFromScript2 );
+        const auto &DSSDesc = pPSOFromScript->GetDesc().GraphicsPipeline.DepthStencilDesc;
+
+        assert( DSSDesc.DepthEnable == True );
+        assert( DSSDesc.DepthWriteEnable == True );
+        assert( DSSDesc.DepthFunc == COMPARISON_FUNC_LESS );
+        assert( DSSDesc.StencilEnable == True );
+        assert( DSSDesc.StencilReadMask == 0xF8 );
+        assert( DSSDesc.StencilWriteMask == 0xF1 );
+        assert( DSSDesc.FrontFace.StencilFailOp == STENCIL_OP_KEEP );
+        assert( DSSDesc.FrontFace.StencilDepthFailOp == STENCIL_OP_ZERO );
+        assert( DSSDesc.FrontFace.StencilPassOp == STENCIL_OP_REPLACE );
+        assert( DSSDesc.FrontFace.StencilFunc == COMPARISON_FUNC_EQUAL );
+        assert( DSSDesc.BackFace.StencilFailOp == STENCIL_OP_INCR_SAT );
+        assert( DSSDesc.BackFace.StencilDepthFailOp == STENCIL_OP_DECR_SAT );
+        assert( DSSDesc.BackFace.StencilPassOp == STENCIL_OP_INVERT );
+        assert( DSSDesc.BackFace.StencilFunc == COMPARISON_FUNC_NOT_EQUAL );
+    }
+
+    {
+        m_PSODesc.GraphicsPipeline.DepthStencilDesc = DepthStencilStateDesc();
+        RefCntAutoPtr<IPipelineState> pPSO;
+        m_pDevice->CreatePipelineState( m_PSODesc, &pPSO );
+        pScript->Run( m_pDeviceContext, "TestDSSDesc", pPSO );
+    }
+}