mirror of
https://github.com/DaedalusX64/daedalus.git
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159 lines
4.6 KiB
C++
159 lines
4.6 KiB
C++
/*
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Copyright (C) 2007 StrmnNrmn
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#pragma once
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#ifndef SYSPSP_HLEGRAPHICS_COMBINER_BLENDCONSTANT_H_
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#define SYSPSP_HLEGRAPHICS_COMBINER_BLENDCONSTANT_H_
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#include <string>
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#include "Graphics/ColourValue.h"
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struct SRenderState;
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enum EBlendConstant
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{
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BC_SHADE,
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BC_PRIMITIVE,
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BC_ENVIRONMENT,
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BC_PRIMITIVE_ALPHA,
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BC_ENVIRONMENT_ALPHA,
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BC_1,
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BC_0,
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};
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class CBlendConstantExpression
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{
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public:
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virtual ~CBlendConstantExpression();
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virtual c32 Evaluate( c32 shade, c32 primitive, c32 environment ) const = 0;
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virtual c32 EvaluateConstant( c32 primitive, c32 environment ) const = 0;
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virtual bool TryEvaluateConstant( const SRenderState & state, c32 * out ) const = 0;
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virtual bool IsShade() const { return false; }
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virtual void ApplyExpressionRGB( const SRenderState & state ) const = 0;
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virtual void ApplyExpressionAlpha( const SRenderState & state ) const = 0;
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virtual std::string ToString() const = 0;
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};
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class CBlendConstantExpressionValue : public CBlendConstantExpression
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{
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public:
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CBlendConstantExpressionValue( EBlendConstant constant )
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: mConstant( constant )
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{
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}
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virtual ~CBlendConstantExpressionValue();
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virtual c32 Evaluate( c32 shade, c32 primitive, c32 environment ) const;
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virtual c32 EvaluateConstant( c32 primitive, c32 environment ) const;
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virtual bool TryEvaluateConstant( const SRenderState & state, c32 * out ) const;
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virtual bool IsShade() const;
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virtual void ApplyExpressionRGB( const SRenderState & state ) const;
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virtual void ApplyExpressionAlpha( const SRenderState & state ) const;
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virtual std::string ToString() const;
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private:
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EBlendConstant mConstant;
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};
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template< typename ColOp >
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class CBlendConstantExpression2 : public CBlendConstantExpression
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{
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public:
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CBlendConstantExpression2( const CBlendConstantExpression * a, const CBlendConstantExpression * b )
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: mA( a )
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, mB( b )
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{
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}
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virtual ~CBlendConstantExpression2();
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virtual c32 Evaluate( c32 shade, c32 primitive, c32 environment ) const;
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virtual c32 EvaluateConstant( c32 primitive, c32 environment ) const;
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virtual bool TryEvaluateConstant( const SRenderState & state, c32 * out ) const;
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virtual void ApplyExpressionRGB( const SRenderState & state ) const;
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virtual void ApplyExpressionAlpha( const SRenderState & state ) const;
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virtual std::string ToString() const;
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private:
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const CBlendConstantExpression * mA;
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const CBlendConstantExpression * mB;
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};
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struct AddOp
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{
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static inline c32 Process( c32 a, c32 b ) { return a.Add( b ); }
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static inline const char * OpString() { return " + "; }
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};
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struct SubOp
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{
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static inline c32 Process( c32 a, c32 b ) { return a.Sub( b ); }
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static inline const char * OpString() { return " - "; }
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};
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struct MulOp
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{
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static inline c32 Process( c32 a, c32 b ) { return a.Modulate( b ); }
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static inline const char * OpString() { return " * "; }
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};
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typedef CBlendConstantExpression2< AddOp > CBlendConstantExpressionAdd;
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typedef CBlendConstantExpression2< SubOp > CBlendConstantExpressionSub;
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typedef CBlendConstantExpression2< MulOp > CBlendConstantExpressionMul;
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class CBlendConstantExpressionBlend : public CBlendConstantExpression
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{
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public:
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CBlendConstantExpressionBlend( const CBlendConstantExpression * a, const CBlendConstantExpression * b, const CBlendConstantExpression * f )
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: mA( a )
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, mB( b )
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, mF( f )
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{
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}
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virtual ~CBlendConstantExpressionBlend();
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virtual c32 Evaluate( c32 shade, c32 primitive, c32 environment ) const;
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virtual c32 EvaluateConstant( c32 primitive, c32 environment ) const;
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virtual bool TryEvaluateConstant( const SRenderState & state, c32 * out ) const;
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virtual void ApplyExpressionRGB( const SRenderState & state ) const;
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virtual void ApplyExpressionAlpha( const SRenderState & state ) const;
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virtual std::string ToString() const;
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private:
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const CBlendConstantExpression * mA;
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const CBlendConstantExpression * mB;
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const CBlendConstantExpression * mF;
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};
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#endif // SYSPSP_HLEGRAPHICS_COMBINER_BLENDCONSTANT_H_
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