/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_IGLRENDER_H )
#define INCLUDED_IGLRENDER_H

#include "igl.h"
#include "generic/vector.h"
class AABB;
class Matrix4;


class GLProgram
{
public:
virtual void enable() = 0;
virtual void disable() = 0;
virtual void setParameters( const Vector3& viewer, const Matrix4& localToWorld, const Vector3& origin, const Vector3& colour, const Matrix4& world2light ) = 0;
};

class OpenGLFogState
{
public:
OpenGLFogState() : mode( GL_EXP ), density( 0 ), start( 0 ), end( 0 ), index( 0 ), colour( 1, 1, 1, 1 ){
}
GLenum mode;
GLfloat density;
GLfloat start;
GLfloat end;
GLint index;
Vector4 colour;
};

//! A collection of opengl state information.
class OpenGLState
{
public:
enum ESort
{
	eSortFirst = 0,
	eSortOpaque = 1,
	eSortMultiFirst = 2,
	eSortMultiLast = 1023,
	eSortOverbrighten = 1024,
	eSortFullbright = 1025,
	eSortHighlight = 1026,
	eSortTranslucent = 1027,
	eSortOverlayFirst = 1028,
	eSortOverlayLast = 2047,
	eSortControlFirst = 2048,
	eSortControlLast = 3071,
	eSortGUI0 = 3072,
	eSortGUI1 = 3073,
	eSortLast = 4096,
};

unsigned int m_state;
std::size_t m_sort;
GLint m_texture;
GLint m_texture1;
GLint m_texture2;
GLint m_texture3;
GLint m_texture4;
GLint m_texture5;
GLint m_texture6;
GLint m_texture7;
Vector4 m_colour;
GLenum m_blend_src, m_blend_dst;
GLenum m_depthfunc;
GLenum m_alphafunc;
GLfloat m_alpharef;
GLfloat m_linewidth;
GLfloat m_pointsize;
GLint m_linestipple_factor;
GLushort m_linestipple_pattern;
OpenGLFogState m_fog;
GLProgram* m_program;

OpenGLState() : m_program( 0 ){
}
};

class OpenGLStateLibrary
{
public:
INTEGER_CONSTANT( Version, 1 );
STRING_CONSTANT( Name, "openglshaderlibrary" );

virtual void getDefaultState( OpenGLState& state ) const = 0;

virtual void insert( const char* name, const OpenGLState& state ) = 0;
virtual void erase( const char* name ) = 0;
};

#include "modulesystem.h"

template<typename Type>
class GlobalModule;
typedef GlobalModule<OpenGLStateLibrary> GlobalOpenGLStateLibraryModule;

template<typename Type>
class GlobalModuleRef;
typedef GlobalModuleRef<OpenGLStateLibrary> GlobalOpenGLStateLibraryModuleRef;

inline OpenGLStateLibrary& GlobalOpenGLStateLibrary(){
	return GlobalOpenGLStateLibraryModule::getTable();
}

#endif