1 files changed, 91 insertions, 0 deletions
diff --git a/materialsystem/stdshaders/occlusion_dx9.cpp b/materialsystem/stdshaders/occlusion_dx9.cpp
new file mode 100644
index 0000000..62e7e9d
--- /dev/null
+++ b/materialsystem/stdshaders/occlusion_dx9.cpp
@@ -0,0 +1,91 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "BaseVSShader.h"
+
+#include "writez_vs20.inc"
+#include "white_ps20.inc"
+#include "white_ps20b.inc"
+
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+ConVar gl_amd_occlusion_workaround( "gl_amd_occlusion_workaround", "1" );
+
+DEFINE_FALLBACK_SHADER( Occlusion, Occlusion_DX9 )
+
+BEGIN_VS_SHADER_FLAGS( Occlusion_DX9, "Help for Occlusion", SHADER_NOT_EDITABLE )
+
+	BEGIN_SHADER_PARAMS
+	END_SHADER_PARAMS
+
+	SHADER_INIT_PARAMS()
+	{
+	}
+
+	SHADER_FALLBACK
+	{
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 90 )
+		{
+			return "Occlusion_DX8";
+		}
+		return 0;
+	}
+
+	SHADER_INIT
+	{
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableColorWrites( false );
+			pShaderShadow->EnableAlphaWrites( false );
+			pShaderShadow->EnableDepthWrites( false );
+
+			DECLARE_STATIC_VERTEX_SHADER( writez_vs20 );
+			SET_STATIC_VERTEX_SHADER( writez_vs20 );
+
+			// No pixel shader on Direct3D, doubles fill rate
+			if ( g_pHardwareConfig->PlatformRequiresNonNullPixelShaders() )
+			{
+				DECLARE_STATIC_PIXEL_SHADER( white_ps20 );
+				SET_STATIC_PIXEL_SHADER( white_ps20 );
+
+				// Workaround for weird AMD bug - if sRGB write isn't enabled here then sRGB write enable in subsequent world rendering passes will randomly not take effect (even though we're enabling it) in the driver.
+				if ( ( IsLinux() || IsWindows() ) && gl_amd_occlusion_workaround.GetBool() )
+				{
+					pShaderShadow->EnableSRGBWrite( true );
+				}
+			}
+
+			// Set stream format (note that this shader supports compression)
+			unsigned int flags = VERTEX_POSITION | VERTEX_FORMAT_COMPRESSED;
+			int nTexCoordCount = 1;
+			int userDataSize = 0;
+			pShaderShadow->VertexShaderVertexFormat( flags, nTexCoordCount, NULL, userDataSize );
+		}
+		DYNAMIC_STATE
+		{
+			DECLARE_DYNAMIC_VERTEX_SHADER( writez_vs20 );
+			SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG, pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
+			SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
+			SET_DYNAMIC_VERTEX_SHADER( writez_vs20 );
+
+			// No pixel shader on Direct3D, doubles fill rate
+			if ( g_pHardwareConfig->PlatformRequiresNonNullPixelShaders() )
+			{
+				DECLARE_DYNAMIC_PIXEL_SHADER( white_ps20 );
+				SET_DYNAMIC_PIXEL_SHADER( white_ps20 );
+			}
+		}
+		Draw();
+	}
+END_SHADER
+