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materialsystem/stdshaders/floattoscreen.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "BaseVSShader.h"
+
+#include "screenspaceeffect_vs20.inc"
+#include "floattoscreen_ps20.inc"
+#include "floattoscreen_ps20b.inc"
+#include "convar.h"
+
+BEGIN_VS_SHADER_FLAGS( floattoscreen, "Help for floattoscreen", SHADER_NOT_EDITABLE )
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( FBTEXTURE, SHADER_PARAM_TYPE_TEXTURE, "", "" )
+		SHADER_PARAM( PIXSHADER, SHADER_PARAM_TYPE_STRING, "floattoscreen_ps20", "Name of the pixel shader to use" )
+	END_SHADER_PARAMS
+
+	SHADER_INIT
+	{
+		if( params[FBTEXTURE]->IsDefined() )
+		{
+			LoadTexture( FBTEXTURE );
+		}
+	}
+	
+	SHADER_FALLBACK
+	{
+		// Requires DX9 + above
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 90 )
+			return "Wireframe";
+		return 0;
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableDepthWrites( false );
+
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			int fmt = VERTEX_POSITION;
+			pShaderShadow->VertexShaderVertexFormat( fmt, 1, 0, 0 );
+
+			// convert from linear to gamma on write.
+			pShaderShadow->EnableSRGBWrite( true );
+
+			// Pre-cache shaders
+			DECLARE_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			SET_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+
+//			DECLARE_STATIC_PIXEL_SHADER( floattoscreen_ps20 );
+//			SET_STATIC_PIXEL_SHADER( floattoscreen_ps20 );
+			if( g_pHardwareConfig->SupportsPixelShaders_2_b() )
+			{
+				const char *szPixelShader = params[PIXSHADER]->GetStringValue();
+				size_t iLength = Q_strlen( szPixelShader );
+
+				if( (iLength > 5) && (Q_stricmp( &szPixelShader[iLength - 5], "_ps20" ) == 0) ) //detect if it's trying to load a ps20 shader
+				{
+					//replace it with the ps20b shader
+					char *szNewName = (char *)stackalloc( sizeof( char ) * (iLength + 2) );
+					memcpy( szNewName, szPixelShader, sizeof( char ) * iLength );
+					szNewName[iLength] = 'b';
+					szNewName[iLength + 1] = '\0';
+					pShaderShadow->SetPixelShader( szNewName, 0 );
+				}
+				else
+				{
+					pShaderShadow->SetPixelShader( params[PIXSHADER]->GetStringValue(), 0 );
+				}
+			}
+			else
+			{
+				pShaderShadow->SetPixelShader( params[PIXSHADER]->GetStringValue(), 0 );
+			}
+		}
+
+		DYNAMIC_STATE
+		{
+			BindTexture( SHADER_SAMPLER0, FBTEXTURE, -1 );
+			DECLARE_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			SET_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+
+//			DECLARE_DYNAMIC_PIXEL_SHADER( floattoscreen_ps20 );
+//			SET_DYNAMIC_PIXEL_SHADER( floattoscreen_ps20 );
+			pShaderAPI->SetPixelShaderIndex( 0 );
+		}
+		Draw();
+	}
+END_SHADER