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materialsystem/IShaderSystem.h

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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