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materialsystem/stdshaders/introscreenspaceeffect.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "BaseVSShader.h"
+
+#include "screenspaceeffect_vs20.inc"
+#include "IntroScreenSpaceEffect_ps20.inc"
+#include "IntroScreenSpaceEffect_ps20b.inc"
+
+BEGIN_VS_SHADER_FLAGS( IntroScreenSpaceEffect, "Help for IntroScreenSpaceEffect", SHADER_NOT_EDITABLE )
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( MODE, SHADER_PARAM_TYPE_INTEGER, "0", "" )
+		SHADER_PARAM( ENABLESRGB, SHADER_PARAM_TYPE_BOOL, "0", "" )
+	END_SHADER_PARAMS
+
+	SHADER_INIT_PARAMS()
+	{
+		SET_FLAGS2( MATERIAL_VAR2_NEEDS_FULL_FRAME_BUFFER_TEXTURE );
+
+		if ( !params[ENABLESRGB]->IsDefined() )
+		{
+			params[ENABLESRGB]->SetIntValue( 0 );
+		}
+	}
+
+	SHADER_INIT
+	{
+	}
+	
+	SHADER_FALLBACK
+	{
+		// Requires DX9 + above
+		if ( IsWindows() && ( g_pHardwareConfig->GetDXSupportLevel() < 90 || g_pHardwareConfig->PreferReducedFillrate() ) )
+			return "IntroScreenSpaceEffect_dx80";
+		return 0;
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+
+			// On OpenGL OSX, we MUST do sRGB reads from the bloom and full framebuffer textures AND sRGB writes on the way out to the framebuffer.
+			if ( params[ENABLESRGB]->GetIntValue() || IsOSX() )
+			{
+				pShaderShadow->EnableSRGBRead( SHADER_SAMPLER0, true );
+				pShaderShadow->EnableSRGBRead( SHADER_SAMPLER1, true );
+				pShaderShadow->EnableSRGBWrite( true );
+			}
+
+			// Only need the adapter if the shader expects sRGB values and we're forced to do an sRGB read by the API/Hardware
+			bool bNeedsSRGBAdapter = ( params[ENABLESRGB]->GetIntValue() == 0 ) && IsOSX() && !g_pHardwareConfig->FakeSRGBWrite() && g_pHardwareConfig->CanDoSRGBReadFromRTs();
+
+			pShaderShadow->VertexShaderVertexFormat( VERTEX_POSITION, 1, 0, 0 );
+
+			DECLARE_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			SET_STATIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			
+			if ( g_pHardwareConfig->SupportsPixelShaders_2_b() || g_pHardwareConfig->ShouldAlwaysUseShaderModel2bShaders() ) // GL always goes the ps2b way for this shader, even on "ps20" parts
+			{
+				DECLARE_STATIC_PIXEL_SHADER( introscreenspaceeffect_ps20b );
+				SET_STATIC_PIXEL_SHADER_COMBO( LINEAR_TO_SRGB, bNeedsSRGBAdapter );
+				SET_STATIC_PIXEL_SHADER( introscreenspaceeffect_ps20b );
+			}
+			else
+			{
+				DECLARE_STATIC_PIXEL_SHADER( introscreenspaceeffect_ps20 );
+				SET_STATIC_PIXEL_SHADER( introscreenspaceeffect_ps20 );
+			}
+
+			pShaderShadow->EnableBlending( true );
+			pShaderShadow->BlendFunc( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE );
+		}
+		DYNAMIC_STATE
+		{
+			pShaderAPI->BindStandardTexture( SHADER_SAMPLER0, TEXTURE_FRAME_BUFFER_FULL_TEXTURE_0 );
+			pShaderAPI->BindStandardTexture( SHADER_SAMPLER1, TEXTURE_FRAME_BUFFER_FULL_TEXTURE_1 );
+			DECLARE_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+			SET_DYNAMIC_VERTEX_SHADER( screenspaceeffect_vs20 );
+
+			if ( g_pHardwareConfig->SupportsPixelShaders_2_b() || g_pHardwareConfig->ShouldAlwaysUseShaderModel2bShaders() ) // Posix always goes the ps2b way for this shader, even on "ps20" parts
+			{
+				DECLARE_DYNAMIC_PIXEL_SHADER( introscreenspaceeffect_ps20b );
+				SET_DYNAMIC_PIXEL_SHADER_COMBO( MODE, params[MODE]->GetIntValue() );
+				SET_DYNAMIC_PIXEL_SHADER( introscreenspaceeffect_ps20b );
+			}
+			else
+			{
+				DECLARE_DYNAMIC_PIXEL_SHADER( introscreenspaceeffect_ps20 );
+				SET_DYNAMIC_PIXEL_SHADER_COMBO( MODE, params[MODE]->GetIntValue() );
+				SET_DYNAMIC_PIXEL_SHADER( introscreenspaceeffect_ps20 );
+			}
+
+			SetPixelShaderConstant( 0, ALPHA );
+		}
+		Draw();
+	}
+END_SHADER