1 files changed, 63 insertions, 0 deletions
diff --git a/materialsystem/stdshaders/decalmodulate.cpp b/materialsystem/stdshaders/decalmodulate.cpp
new file mode 100644
index 0000000..8484ccd
--- /dev/null
+++ b/materialsystem/stdshaders/decalmodulate.cpp
@@ -0,0 +1,63 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Header: $
+// $NoKeywords: $
+//=============================================================================//
+
+#include "shaderlib/cshader.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+DEFINE_FALLBACK_SHADER( DecalModulate, DecalModulate_DX6 )
+
+BEGIN_SHADER( DecalModulate_dx6, 
+			  "Help for DecalModulate_dx6" )
+			  
+	BEGIN_SHADER_PARAMS
+	END_SHADER_PARAMS
+	
+	SHADER_INIT_PARAMS()
+	{
+		SET_FLAGS( MATERIAL_VAR_NO_DEBUG_OVERRIDE );
+	}
+
+	SHADER_INIT
+	{
+		LoadTexture( BASETEXTURE );
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableAlphaTest( true );
+			pShaderShadow->AlphaFunc( SHADER_ALPHAFUNC_GREATER, 0.0f );
+			pShaderShadow->EnableDepthWrites( false );
+			pShaderShadow->EnablePolyOffset( SHADER_POLYOFFSET_DECAL );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableBlending( true );
+			pShaderShadow->BlendFunc( SHADER_BLEND_DST_COLOR, SHADER_BLEND_SRC_COLOR );
+			pShaderShadow->DrawFlags( SHADER_DRAW_POSITION | SHADER_DRAW_TEXCOORD0 );
+			FogToGrey();
+		}
+		DYNAMIC_STATE
+		{
+			// This is kinda gross.  We really don't want to render anything here for the flashlight
+			// pass since we are multiplying by what is already flashlight lit in the framebuffer.
+			// There is no easy way to draw nothing conditionally, so I'll bind grey and multiply
+			// which shouldn't change the contents of the framebuffer much.
+			if( pShaderAPI->InFlashlightMode() )
+			{
+				pShaderAPI->BindStandardTexture( SHADER_SAMPLER0, TEXTURE_GREY );
+			}
+			else
+			{
+				BindTexture( SHADER_SAMPLER0, BASETEXTURE, FRAME );
+			}
+		}
+		Draw( );
+	}
+END_SHADER