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materialsystem/stdshaders/portal_ps11.fxc

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+// STATIC: "MAXTEXTURESTAGES"	"0..2"
+// STATIC: "HASALPHAMASK"		"0..1"
+// STATIC: "HASSTATICTEXTURE"	"0..1"
+
+// DYNAMIC: "ADDSTATIC"			"0..1"
+// DYNAMIC: "PIXELFOGTYPE"		"0..1"
+
+// When max texture stages is less than 2, we go into multipass mode, but without a static texture, we consolidate back to a single pass by using gray as static
+// SKIP: ($MAXTEXTURESTAGES < 2) && ($HASSTATICTEXTURE == 0) && ($ADDSTATIC == 1)
+
+#define TEXTURESTAGES (MAXTEXTURESTAGES + 1)
+#define USESTATICTEXTURE (((ADDSTATIC == 1) && (HASSTATICTEXTURE == 1))?(1):(0))
+
+#include "common_ps_fxc.h"
+
+
+
+const HALF3 g_StaticAmount	: register( c0 ); //x is static, y is 1.0 - static
+
+sampler PrimarySampler		: register( s0 );
+#if( TEXTURESTAGES == 3 )
+#	if( (HASALPHAMASK == 1) || (USESTATICTEXTURE == 1) )
+		sampler SecondarySampler	: register( s1 );
+#		if( (HASALPHAMASK == 1) && (USESTATICTEXTURE == 1) )
+			sampler TertiarySampler		: register( s2 );
+#		endif
+#	endif
+#elif( (TEXTURESTAGES > 1) && (HASALPHAMASK == 1) )
+	sampler SecondarySampler	: register( s1 );
+#endif
+
+struct PS_INPUT
+{
+	float3 vPrimaryTexCoord			: TEXCOORD0;	
+
+#	if( TEXTURESTAGES == 3 )
+#		if( (HASALPHAMASK == 1) || (USESTATICTEXTURE == 1) )
+			float2 vSecondaryTexCoord		: TEXCOORD1;
+#			if( (HASALPHAMASK == 1) && (USESTATICTEXTURE == 1) )
+				float2 vTertiaryTexCoord		: TEXCOORD2;
+#			endif
+#		endif
+#	elif( TEXTURESTAGES > 1 && HASALPHAMASK == 1 )
+		float2 vSecondaryTexCoord		: TEXCOORD1;
+#	endif
+};
+
+
+
+
+HALF4 main( PS_INPUT i ) : COLOR
+{
+	HALF4 result;
+	
+#	if( TEXTURESTAGES == 3 ) //we can do everything in one pass
+	{
+		result.rgb = tex2D(PrimarySampler, i.vPrimaryTexCoord.xy ).rgb;
+		
+		//mix in static	
+#		if( ADDSTATIC == 1 )
+		{
+			result.rgb *= g_StaticAmount.y; //inverse static on original colors
+			
+#			if( HASSTATICTEXTURE == 1 )
+			{
+#				if( HASALPHAMASK == 1 )
+					result.rgb += tex2D(TertiarySampler, i.vTertiaryTexCoord ).rgb * g_StaticAmount.x; //static
+#				else
+					result.rgb += tex2D(SecondarySampler, i.vSecondaryTexCoord ).rgb * g_StaticAmount.x; //static	
+#				endif
+			}
+#			else
+			{
+				result.rgb += g_StaticAmount.x * 0.25; //mix in gray	
+			}
+#			endif
+		}	
+#		endif
+		
+#		if( HASALPHAMASK == 1 )
+		{
+			//alpha mask
+			result.a = tex2D(SecondarySampler, i.vSecondaryTexCoord ).a;
+		}
+#		else
+		{
+			result.a = 1;
+		}
+#		endif	
+	}
+#	else //multiple pass configuration
+	{
+#		if( ADDSTATIC == 1 ) //in multipass configuration and adding static
+		{
+#			if( HASSTATICTEXTURE == 1 )
+				result.rgb = tex2D(PrimarySampler, i.vPrimaryTexCoord.xy ).rgb;
+#			endif
+			result.a = g_StaticAmount.x; //in multipass, static is achieved by alpha blending the static onto an existing cutout pixel in the destination pixel
+		}
+#		else //in multipass config on the cutout pass
+		{
+			result.rgb = tex2D(PrimarySampler, i.vPrimaryTexCoord.xy ).rgb;
+			
+#			if( HASSTATICTEXTURE == 0 ) //there's no need to do another pass if there's no other texture to mix with, just mix in gray
+			{
+				result.rgb *= g_StaticAmount.y;
+				result.rgb += g_StaticAmount.x * 0.25; //mix in gray
+			}
+#			endif
+			
+			result.a = 1;
+		}
+#		endif
+		
+#		if( (TEXTURESTAGES > 1) && (HASALPHAMASK == 1) )
+			result.a *= tex2D(SecondarySampler, i.vSecondaryTexCoord ).a; //modulate in the alpha instead of setting it so we get blend as well as mask
+#		endif
+	}
+#	endif
+
+	return result;
+}