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106 lines
4.0 KiB
106 lines
4.0 KiB
5 years ago
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#ifndef ISHADER_H
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#define ISHADER_H
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#ifdef _WIN32
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#pragma once
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#endif
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//==================================================================================================
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// **this goes into both platforms which run the translator, either the real Mac client or
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// the Windows client running with r_emulategl mode **
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//
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// size of the VS register bank in ARB / GLSL we expose
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// it's not 256, because you can't use all 256 slots in 10.5.x.
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// use this constant everywhere you might normally use "256" in reference to a parameter array size.
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// The highest shader constant is c218, plus we allocate c219 and c220 for two clip planes
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#define DXABSTRACT_VS_PARAM_SLOTS 228
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#define DXABSTRACT_VS_FIRST_BONE_SLOT VERTEX_SHADER_MODEL
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#define DXABSTRACT_VS_LAST_BONE_SLOT (VERTEX_SHADER_SHADER_SPECIFIC_CONST_13-1)
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// user clip plane 0 goes in DXABSTRACT_VS_CLIP_PLANE_BASE... plane 1 goes in the slot after that
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// dxabstract uses these constants to check plane index limit and to deliver planes to shader for DP4 -> oCLP[n]
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#define DXABSTRACT_VS_CLIP_PLANE_BASE (DXABSTRACT_VS_PARAM_SLOTS-2)
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//==================================================================================================
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#include "materialsystem/imaterialsystem.h"
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#include "materialsystem/ishaderapi.h"
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#include "materialsystem/ishadersystem_declarations.h"
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//-----------------------------------------------------------------------------
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// forward declarations
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//-----------------------------------------------------------------------------
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class IMaterialVar;
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class IShaderShadow;
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class IShaderDynamicAPI;
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class IShaderInit;
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class CBasePerMaterialContextData;
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//-----------------------------------------------------------------------------
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// Information about each shader parameter
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//-----------------------------------------------------------------------------
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struct ShaderParamInfo_t
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{
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const char *m_pName;
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const char *m_pHelp;
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ShaderParamType_t m_Type;
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const char *m_pDefaultValue;
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int m_nFlags;
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};
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#define VERTEX_SHADER_BONE_TRANSFORM( k ) ( VERTEX_SHADER_MODEL + 3 * (k) )
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// The public methods exposed by each shader
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//-----------------------------------------------------------------------------
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abstract_class IShader
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{
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public:
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// Returns the shader name
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virtual char const* GetName( ) const = 0;
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// returns the shader fallbacks
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virtual char const* GetFallbackShader( IMaterialVar** params ) const = 0;
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// Shader parameters
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virtual int GetNumParams( ) const = 0;
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// These functions must be implemented by the shader
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virtual void InitShaderParams( IMaterialVar** ppParams, const char *pMaterialName ) = 0;
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virtual void InitShaderInstance( IMaterialVar** ppParams, IShaderInit *pShaderInit, const char *pMaterialName, const char *pTextureGroupName ) = 0;
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virtual void DrawElements( IMaterialVar **params, int nModulationFlags,
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IShaderShadow* pShaderShadow, IShaderDynamicAPI* pShaderAPI, VertexCompressionType_t vertexCompression, CBasePerMaterialContextData **pContextDataPtr ) = 0;
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virtual char const* GetParamName( int paramIndex ) const = 0;
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virtual char const* GetParamHelp( int paramIndex ) const = 0;
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virtual ShaderParamType_t GetParamType( int paramIndex ) const = 0;
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virtual char const* GetParamDefault( int paramIndex ) const = 0;
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// FIXME: Figure out a better way to do this?
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virtual int ComputeModulationFlags( IMaterialVar** params, IShaderDynamicAPI* pShaderAPI ) = 0;
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virtual bool NeedsPowerOfTwoFrameBufferTexture( IMaterialVar **params, bool bCheckSpecificToThisFrame = true ) const = 0;
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virtual bool NeedsFullFrameBufferTexture( IMaterialVar **params, bool bCheckSpecificToThisFrame ) const = 0;
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virtual bool IsTranslucent( IMaterialVar **params ) const = 0;
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virtual int GetParamFlags( int paramIndex ) const = 0;
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virtual int GetFlags() const = 0;
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// FIXME: Remove GetParamName, etc. above
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// virtual const ShaderParamInfo_t& GetParamInfo( int paramIndex ) const = 0;
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};
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#endif // ISHADER_H
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