Dealing with two different loaders for simulation and reconstruction if necessary...

[u/mrichter/AliRoot.git] / EVE / Reve / GLUtilNS.h

#ifndef Reve_GLUtilNS_H
#define Reve_GLUtilNS_H
#ifndef __CINT__

#include <TGLIncludes.h>

namespace GLUtilNS
{

class GL_Capability_Switch {
  GLenum    fWhat;
  GLboolean fState;
  bool      fFlip;

  void set_state(GLboolean s)
  { if(s) glEnable(fWhat); else glDisable(fWhat); }

public:
  GL_Capability_Switch(GLenum what, GLboolean state) : fWhat(what)
  {
    fState = glIsEnabled(fWhat);
    fFlip  = (fState != state);
    if(fFlip)	set_state(state);
  }
  ~GL_Capability_Switch()
  { if(fFlip) set_state(fState); }
};

class GL_Float_Holder
{
  GLenum    fWhat;
  GLfloat   fState;
  bool      fFlip;
  void    (*fFoo)(GLfloat);

public:
  GL_Float_Holder(GLenum what, GLfloat state, void (*foo)(GLfloat)) :
    fWhat(what), fFoo(foo)
  {
    glGetFloatv(fWhat, &fState);
    fFlip = (fState != state);
    if(fFlip) fFoo(state);
  }
  ~GL_Float_Holder()
  { if(fFlip) fFoo(fState); }
};

}

#endif
#endif