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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $Header: $
// $NoKeywords: $
// An interface that should not ever be accessed directly from shaders
// but instead is visible only to shaderlib.
//===========================================================================//
#ifndef ISHADERSYSTEM_H
#define ISHADERSYSTEM_H
#ifdef _WIN32
#pragma once
#endif
#include "interface.h"
#include <materialsystem/IShader.h>
//-----------------------------------------------------------------------------
// Forward declarations
//-----------------------------------------------------------------------------
enum Sampler_t;
class ITexture;
class IShader;
//-----------------------------------------------------------------------------
// The Shader system interface version
//-----------------------------------------------------------------------------
#define SHADERSYSTEM_INTERFACE_VERSION "ShaderSystem002"
//-----------------------------------------------------------------------------
// Modulation flags
//-----------------------------------------------------------------------------
enum
{
SHADER_USING_COLOR_MODULATION = 0x1,
SHADER_USING_ALPHA_MODULATION = 0x2,
SHADER_USING_FLASHLIGHT = 0x4,
SHADER_USING_FIXED_FUNCTION_BAKED_LIGHTING = 0x8,
SHADER_USING_EDITOR = 0x10,
};
//-----------------------------------------------------------------------------
// The shader system (a singleton)
//-----------------------------------------------------------------------------
abstract_class IShaderSystem
{
public:
virtual ShaderAPITextureHandle_t GetShaderAPITextureBindHandle( ITexture *pTexture, int nFrameVar, int nTextureChannel = 0 ) =0;
// Binds a texture
virtual void BindTexture( Sampler_t sampler1, ITexture *pTexture, int nFrameVar = 0 ) = 0;
virtual void BindTexture( Sampler_t sampler1, Sampler_t sampler2, ITexture *pTexture, int nFrameVar = 0 ) = 0;
// Takes a snapshot
virtual void TakeSnapshot( ) = 0;
// Draws a snapshot
virtual void DrawSnapshot( bool bMakeActualDrawCall = true ) = 0;
// Are we using graphics?
virtual bool IsUsingGraphics() const = 0;
// Are we using graphics?
virtual bool CanUseEditorMaterials() const = 0;
};
//-----------------------------------------------------------------------------
// The Shader plug-in DLL interface version
//-----------------------------------------------------------------------------
#define SHADER_DLL_INTERFACE_VERSION "ShaderDLL004"
//-----------------------------------------------------------------------------
// The Shader interface versions
//-----------------------------------------------------------------------------
abstract_class IShaderDLLInternal
{
public:
// Here's where the app systems get to learn about each other
virtual bool Connect( CreateInterfaceFn factory, bool bIsMaterialSystem ) = 0;
virtual void Disconnect( bool bIsMaterialSystem ) = 0;
// Returns the number of shaders defined in this DLL
virtual int ShaderCount() const = 0;
// Returns information about each shader defined in this DLL
virtual IShader *GetShader( int nShader ) = 0;
};
//-----------------------------------------------------------------------------
// Singleton interface
//-----------------------------------------------------------------------------
IShaderDLLInternal *GetShaderDLLInternal();
#endif // ISHADERSYSTEM_H
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