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// $Id: G4OpenGLBitMapStore.hh,v 1.2 2007/11/15 10:14:23 allison Exp $
// GEANT4 tag $Name:  $
//
// 
// John Allison  6th January 2007
//
// Class description
//
// Keeps bit maps on byte boundaries suitable for drawing.  For
// example, in OpenGL:
//
//   const char* circle = G4OpenGLBitMapStore::GetCircle(size, true);
//   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
//   glBitmap(size, size, size/2., size/2., 0., 0., circle);

#ifdef G4VIS_BUILD_OPENGL_DRIVER

#ifndef G4OPENGLBITMAPSTORE_HH
#define G4OPENGLBITMAPSTORE_HH

#include "globals.hh"
#include "G4OpenGL.hh"
#include <map>

namespace G4OpenGLBitMapStore {

  enum Shape {circle, square};

  const GLubyte* GetBitMap(Shape, G4double& size, G4bool filled);
  // Size in pixels (gets changed to a rationalised value).

  struct Key{
    Key(Shape shape, G4int size, G4bool filled):
      fShape(shape), fSize(size), fFilled(filled) {}
    bool operator<(const Key& rhs) const {
      if (fShape < rhs.fShape) return true;
      else if (fSize < rhs.fSize) return true;
      else if (fFilled != rhs.fFilled) return true;
      else return false;
    }
    Shape fShape;
    G4int fSize;
    G4bool fFilled;
  };

  extern std::map<Key, GLubyte*> fStore;

}

#endif

#endif
