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materialsystem/stdshaders/downsample_nohdr_dx80.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "BaseVSShader.h"
+#include "common_hlsl_cpp_consts.h"
+#include "convar.h"
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+DEFINE_FALLBACK_SHADER( Downsample_nohdr, Downsample_nohdr_DX80 )
+
+BEGIN_VS_SHADER_FLAGS( Downsample_nohdr_DX80, "Help for Downsample_nohdr_DX80", SHADER_NOT_EDITABLE )
+
+	BEGIN_SHADER_PARAMS
+	END_SHADER_PARAMS
+
+	SHADER_INIT
+	{
+		LoadTexture( BASETEXTURE );
+	}
+
+	SHADER_FALLBACK
+	{
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 80 )
+		{
+			return "Wireframe";
+		}
+		return 0;
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableDepthWrites( false );
+			pShaderShadow->EnableAlphaWrites( true );
+
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER3, true );
+
+			pShaderShadow->VertexShaderVertexFormat( VERTEX_POSITION, 1, 0, 0 );
+
+			pShaderShadow->SetVertexShader( "Downsample_vs11", 0 );
+			pShaderShadow->SetPixelShader( "Downsample_nohdr_ps11" );
+		}
+
+		DYNAMIC_STATE
+		{
+			BindTexture( SHADER_SAMPLER0, BASETEXTURE, -1 );
+			BindTexture( SHADER_SAMPLER1, BASETEXTURE, -1 );
+			BindTexture( SHADER_SAMPLER2, BASETEXTURE, -1 );
+			BindTexture( SHADER_SAMPLER3, BASETEXTURE, -1 );
+
+			int width, height;
+			pShaderAPI->GetBackBufferDimensions( width, height );
+
+			float v[4][4];
+			float dX = 1.0f/width;
+			float dY = 1.0f/height;
+
+			v[0][0] = .5*dX;
+			v[0][1] = .5*dY;
+			v[1][0] = 2.5*dX;
+			v[1][1] = .5*dY;
+			v[2][0] = .5*dX;
+			v[2][1] = 2.5*dY;
+			v[3][0] = 2.5*dX;
+			v[3][1] = 2.5*dY;
+			pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_0, &v[0][0], 4 );
+
+			pShaderAPI->SetVertexShaderIndex( 0 );
+			pShaderAPI->SetPixelShaderIndex( 0 );
+		}
+		Draw();
+	}
+END_SHADER