1HEADmaster

1 files changed, 127 insertions, 0 deletions

diff --git a/materialsystem/stdshaders/decal.cpp b/materialsystem/stdshaders/decal.cpp
new file mode 100644
index 0000000..3f1f90e
--- /dev/null
+++ b/materialsystem/stdshaders/decal.cpp
@@ -0,0 +1,127 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "shaderlib/cshader.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+BEGIN_SHADER_FLAGS( Decal, "Help for Decal", SHADER_NOT_EDITABLE )
+			  
+	BEGIN_SHADER_PARAMS
+	END_SHADER_PARAMS
+	
+	SHADER_INIT_PARAMS()
+	{
+		SET_FLAGS( MATERIAL_VAR_NO_DEBUG_OVERRIDE );
+	}
+
+	SHADER_INIT
+	{
+		LoadTexture( BASETEXTURE );
+	}
+
+	SHADER_DRAW
+	{
+		// vertex alpha 0 = mod2x, vertex alpha 1 = src_alpha,1-src_alpha
+		// need to set constant color to grey
+		SHADOW_STATE
+		{
+			// common stuff
+			pShaderShadow->EnableDepthWrites( false );
+			pShaderShadow->EnablePolyOffset( SHADER_POLYOFFSET_DECAL );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+			pShaderShadow->EnableBlending( true );
+		}
+		// MOD2X pass		
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableCustomPixelPipe( true );
+			pShaderShadow->CustomTextureStages( 2 );
+
+			// color = texture
+			// alpha = vertexalpha			
+			pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+					SHADER_TEXCHANNEL_COLOR, SHADER_TEXOP_SELECTARG1, 
+					SHADER_TEXARG_TEXTURE, SHADER_TEXARG_NONE );
+			pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+					SHADER_TEXCHANNEL_ALPHA, SHADER_TEXOP_SELECTARG1, 
+					SHADER_TEXARG_SPECULARCOLOR, SHADER_TEXARG_NONE );
+
+			// color = texture
+			// alpha = blend
+			pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE1, 
+				SHADER_TEXCHANNEL_COLOR, SHADER_TEXOP_BLEND_PREVIOUSSTAGEALPHA, 
+				SHADER_TEXARG_CONSTANTCOLOR, SHADER_TEXARG_PREVIOUSSTAGE );
+
+			pShaderShadow->BlendFunc( SHADER_BLEND_DST_COLOR, SHADER_BLEND_SRC_COLOR );
+			FogToGrey();
+
+			pShaderShadow->DrawFlags( SHADER_DRAW_POSITION | SHADER_DRAW_TEXCOORD0 | SHADER_DRAW_SPECULAR
+				| SHADER_DRAW_LIGHTMAP_TEXCOORD1 );
+		}
+		DYNAMIC_STATE
+		{
+			pShaderAPI->Color3f( 0.5f, 0.5f, 0.5f );
+			BindTexture( SHADER_SAMPLER0, BASETEXTURE, FRAME );
+			pShaderAPI->BindStandardTexture( SHADER_SAMPLER1, TEXTURE_LIGHTMAP );
+		}
+		Draw();
+
+		// srcalpha,1-srcalpha pass		
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableCustomPixelPipe( true );
+			pShaderShadow->CustomTextureStages( 2 );
+
+			// color = texture
+			// alpha = texture
+			if (IS_FLAG_SET( MATERIAL_VAR_VERTEXCOLOR ))
+			{
+				pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+						SHADER_TEXCHANNEL_COLOR, SHADER_TEXOP_MODULATE, 
+						SHADER_TEXARG_TEXTURE, SHADER_TEXARG_VERTEXCOLOR );
+			}
+			else
+			{
+				pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+						SHADER_TEXCHANNEL_COLOR, SHADER_TEXOP_SELECTARG1, 
+						SHADER_TEXARG_TEXTURE, SHADER_TEXARG_NONE );
+			}
+
+			if( IS_FLAG_SET( MATERIAL_VAR_VERTEXALPHA ) )
+			{
+				pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+						SHADER_TEXCHANNEL_ALPHA, SHADER_TEXOP_MODULATE, 
+						SHADER_TEXARG_TEXTURE, SHADER_TEXARG_VERTEXCOLOR );
+			}
+			else
+			{
+				pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE0, 
+						SHADER_TEXCHANNEL_ALPHA, SHADER_TEXOP_SELECTARG1, 
+						SHADER_TEXARG_TEXTURE, SHADER_TEXARG_NONE );
+			}
+
+			// color = texture [* vertex color] * lightmap color
+			// alpha = texture alpha [* vertex alpha] * specular alpha
+			pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE1, 
+					SHADER_TEXCHANNEL_COLOR, SHADER_TEXOP_MODULATE2X, 
+					SHADER_TEXARG_PREVIOUSSTAGE, SHADER_TEXARG_TEXTURE );
+			pShaderShadow->CustomTextureOperation( SHADER_TEXTURE_STAGE1, 
+				SHADER_TEXCHANNEL_ALPHA, SHADER_TEXOP_MODULATE, 
+				SHADER_TEXARG_PREVIOUSSTAGE, SHADER_TEXARG_SPECULARCOLOR );
+
+			pShaderShadow->BlendFunc( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE_MINUS_SRC_ALPHA );
+			FogToFogColor();
+		}
+		DYNAMIC_STATE
+		{
+			SetColorState( COLOR );
+		}
+		Draw();
+	}
+END_SHADER