MeVis/Foundation/Sources/MLOpenGL/mlGLContext.h

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// **InsertLicense** code
//----------------------------------------------------------------------------------

//----------------------------------------------------------------------------------

#ifndef __mlGLContext_H
#define __mlGLContext_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