mlGLContext.h

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/*************************************************************************************
**
** Copyright 2007, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#ifndef ML_GLCONTEXT_H
#define ML_GLCONTEXT_H

 
#include "mlOpenGLSystem.h"
#include "mlOpenGL.h"
 
ML_OPENGL_START_NAMESPACE
 
class GLContextStackPrivate;

class MLOPENGL_EXPORT GLContextStack
{
  public:
    class TemporaryGLContextScope {
      public:
        TemporaryGLContextScope() {
          GLContextStack::createTemporaryContextAndActivate();
        }
        ~TemporaryGLContextScope() {
          GLContextStack::destroyTemporaryContextAndActivatePreviousContext();
        }
    };

    class StoreCurrentGLContextScope {
      public:
        StoreCurrentGLContextScope() {
          GLContextStack::pushCurrentContext();
        }
        ~StoreCurrentGLContextScope() {
          GLContextStack::popCurrentContext();
        }
    };

    static void pushCurrentContext();

    static void popCurrentContext();

    static void createTemporaryContextAndActivate();

    static void destroyTemporaryContextAndActivatePreviousContext();
 
  private:
    static void init();
 
    static GLContextStackPrivate* _private;
};
 
ML_OPENGL_END_NAMESPACE

#define CREATE_AND_ACTIVATE_GLCONTEXT \
  ML_OPENGL_NAMESPACE::GLContextStack::createTemporaryContextAndActivate();

#define DESTROY_GLCONTEXT_AND_ACTIVATE_PREVIOUS \
  ML_OPENGL_NAMESPACE::GLContextStack::destroyTemporaryContextAndActivatePreviousContext();
 
#endif  // __mlGLContext_H