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//========= 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
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