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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
//! clanGL="System"
//! header=gl.h
#ifndef header_opengl_state
#define header_opengl_state
#ifdef CL_API_DLL
#ifdef CL_GL_EXPORT
#define CL_API_GL __declspec(dllexport)
#else
#define CL_API_GL __declspec(dllimport)
#endif
#else
#define CL_API_GL
#endif
#if _MSC_VER > 1000
#pragma once
#endif
#include "../Core/System/sharedptr.h"
class CL_GraphicContext;
class CL_GraphicContext_OpenGL;
class CL_OpenGLStateData;
class CL_OpenGLState_Generic;
class CL_GLStateChecker;
//: OpenGL state setup handler class.
//- !group=GL/System!
//- !header=gl.h!
class CL_API_GL CL_OpenGLState
{
//! Construction:
public:
//: Constructs an opengl state set.
CL_OpenGLState();
CL_OpenGLState(CL_GraphicContext *gc);
CL_OpenGLState(const CL_OpenGLState ©);
~CL_OpenGLState();
//! Attributes:
public:
//: Returns true if opengl state is currently active.
bool is_active() const;
//! Operations:
public:
//: Activates this OpenGL state set.
void set_active();
//: Attaches a new data object responsible for saving and restoring states.
void attach_data(CL_OpenGLStateData *data, bool delete_data = false);
//: Detaches a data object.
void detach_data(CL_OpenGLStateData *data);
//: Setup window 2D rendering mode.
//param upside_down: If set to true, (0,0) will be in the lower left corner.
//- <p> This effectively loads a Orto 2D projection matrix and makes sure
//- the device are using sane texture parameter values.</p>
void setup_2d(bool upside_down = false);
//! Implementation:
private:
CL_OpenGLState(CL_GraphicContext_OpenGL *gc_opengl);
CL_SharedPtr<CL_OpenGLState_Generic> impl;
friend class CL_GLStateChecker;
};
#endif
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