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materialsystem/stdshaders/filmgrain_dx8_dx9.cpp

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+//========= Copyright <20> 1996-2002, Valve LLC, All rights reserved. ============
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================
+
+#include "basevsshader.h"
+
+#ifdef STDSHADER_DX9_DLL_EXPORT
+#include "screenspaceeffect_vs20.inc"
+#include "filmgrain_ps20.inc"
+#else
+#include "screenspaceeffect_vs11.inc"
+#include "filmgrain_ps11.inc"
+#endif
+
+#include "../materialsystem_global.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#ifdef STDSHADER_DX9_DLL_EXPORT
+DEFINE_FALLBACK_SHADER( FilmGrain, FilmGrain_dx9 )
+BEGIN_VS_SHADER_FLAGS( FilmGrain_dx9, "Help for FilmGrain", SHADER_NOT_EDITABLE )
+#else
+DEFINE_FALLBACK_SHADER( FilmGrain, FilmGrain_dx8 )
+BEGIN_VS_SHADER_FLAGS( FilmGrain_dx8, "Help for FilmGrain", SHADER_NOT_EDITABLE )
+#endif
+
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( GRAIN_TEXTURE,  SHADER_PARAM_TYPE_TEXTURE, "0", "Film grain texture" )
+		SHADER_PARAM( NOISESCALE,     SHADER_PARAM_TYPE_VEC4, "", "Strength of film grain" )
+	END_SHADER_PARAMS
+
+	SHADER_INIT_PARAMS()
+	{
+		SET_FLAGS2( MATERIAL_VAR2_NEEDS_FULL_FRAME_BUFFER_TEXTURE );
+	}
+
+	SHADER_FALLBACK
+	{
+#ifdef STDSHADER_DX9_DLL_EXPORT
+		// Requires DX9 + above
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 90)
+		{
+				return "FilmGrain_dx8";
+		}
+#else // We're DX8
+		// Requires DX8 + above
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 80)
+		{
+			return "FilmGrain_dx7";
+		}
+#endif
+
+		return 0;
+	}
+
+	SHADER_INIT
+	{
+		LoadTexture( GRAIN_TEXTURE );
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableBlending( true );
+			pShaderShadow->BlendFunc( SHADER_BLEND_ONE, SHADER_BLEND_SRC_ALPHA );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+
+			int fmt = VERTEX_POSITION;
+			pShaderShadow->VertexShaderVertexFormat( fmt, 1, 0, 0 );
+
+#ifdef STDSHADER_DX9_DLL_EXPORT
+			DECLARE_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			SET_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+
+			DECLARE_STATIC_PIXEL_SHADER( filmgrain_ps20 );
+			SET_STATIC_PIXEL_SHADER( filmgrain_ps20 );
+#else
+			DECLARE_STATIC_VERTEX_SHADER( screenspaceeffect_vs11 );
+			SET_STATIC_VERTEX_SHADER( screenspaceeffect_vs11 );
+
+			DECLARE_STATIC_PIXEL_SHADER( filmgrain_ps11 );
+			SET_STATIC_PIXEL_SHADER( filmgrain_ps11 );
+#endif
+
+		}
+		DYNAMIC_STATE
+		{
+			BindTexture( SHADER_SAMPLER0, false, GRAIN_TEXTURE, -1 );
+						
+			SetPixelShaderConstant( 0, NOISESCALE );
+
+#ifdef STDSHADER_DX9_DLL_EXPORT
+				DECLARE_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+				SET_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+
+				DECLARE_DYNAMIC_PIXEL_SHADER( filmgrain_ps20 );
+				SET_DYNAMIC_PIXEL_SHADER( filmgrain_ps20 );
+#else
+				DECLARE_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs11 );
+				SET_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs11 );
+
+				DECLARE_DYNAMIC_PIXEL_SHADER( filmgrain_ps11 );
+				SET_DYNAMIC_PIXEL_SHADER( filmgrain_ps11 );
+#endif
+		}
+		Draw();
+	}
+END_SHADER