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/********************************************************************************
* *
* G L C o n t e x t C l a s s *
* *
*********************************************************************************
* Copyright (C) 2000,2002 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *
*********************************************************************************
* $Id: FXGLContext.h,v 1.8 2002/01/18 22:42:53 jeroen Exp $ *
********************************************************************************/
#ifndef FXGLCONTEXT_H
#define FXGLCONTEXT_H
////////////////////////////// UNDER DEVELOPMENT //////////////////////////////
class FXApp;
class FXDrawable;
class FXGLVisual;
/**
* A GL context is an object representing the OpenGL state information.
* Multiple GL context may share display lists to conserve memory.
* When drawing multiple windows, it may be advantageous to share not only
* display lists, but also GL contexts. Since the GL context is created
* for a certain frame-buffer configuration, sharing of GL contexts is
* only possible if the windows sharing the GL context all have the same
* GL visual.
* However, display lists may be shared between different GL contexts.
*/
class FXAPI FXGLContext : public FXId {
FXDECLARE(FXGLContext)
private:
FXGLVisual *visual; // Visual for this context
FXDrawable *surface; // Drawable context is locked on
FXGLContext *sgnext; // Share group next in share list
FXGLContext *sgprev; // Share group previous in share list
protected:
void *ctx; // GL Context
protected:
FXGLContext():visual(NULL),surface(NULL),sgnext(NULL),sgprev(NULL),ctx(NULL){}
private:
FXGLContext(const FXGLContext&);
FXGLContext &operator=(const FXGLContext&);
public:
/**
* Construct an OpenGL context with its own private display list.
*/
FXGLContext(FXApp* a,FXGLVisual *vis);
/**
* Construct an OpenGL context sharing display lists with an existing GL context.
*/
FXGLContext(FXApp* a,FXGLVisual *vis,FXGLContext *shared);
/// Return TRUE if it is sharing display lists
FXbool isShared() const;
/// Get the visual
FXGLVisual* getVisual() const { return visual; }
/// Create context
virtual void create();
/// Detach the server-side resources for this window
virtual void detach();
/// Destroy the server-side resources for this window
virtual void destroy();
/// Make OpenGL context current prior to performing OpenGL commands
FXbool begin(FXDrawable *drawable);
/// Make OpenGL context non current
FXbool end();
/// Swap front and back buffer
void swapBuffers();
/// Copy part of backbuffer to front buffer [Mesa]
void swapSubBuffers(FXint x,FXint y,FXint w,FXint h);
/// Save object to stream
virtual void save(FXStream& store) const;
/// Load object from stream
virtual void load(FXStream& store);
/// Destructor
virtual ~FXGLContext();
};
#endif
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