QuartzUtils.mm

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// @(#)root/graf2d:$Id$
// Author: Timur Pocheptsov, 11/06/2012
 
/*************************************************************************
 * Copyright (C) 1995-2011, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include <cassert>
 
#include "QuartzUtils.h"
 
namespace ROOT {
namespace Quartz {
 
//______________________________________________________________________________
CGStateGuard::CGStateGuard(MacOSX::Util::CFScopeGuard<CGContextRef> &ctx)
               : fCtx(ctx.Get())
{
   assert(fCtx != 0 && "CGStateGuard, ctx parameter is null");
   CGContextSaveGState(fCtx);
}
 
//______________________________________________________________________________
CGStateGuard::CGStateGuard(CGContextRef ctx)
               : fCtx(ctx)
{
   assert(ctx != 0 && "CGStateGuard, ctx parameter is null");
   CGContextSaveGState(ctx);
}
 
//______________________________________________________________________________
CGStateGuard::~CGStateGuard()
{
   CGContextRestoreGState(fCtx);
}
 
//Actually, this class does any work only if you disable anti-aliasing, by default I have it on
//and there is nothing to do for a guard if you want it on.
 
//______________________________________________________________________________
CGAAStateGuard::CGAAStateGuard(CGContextRef ctx, bool enable)
               : fCtx(ctx),
                 fEnable(enable)
{
   assert(ctx != 0 && "CGAAStateGuard, ctx parameter is null");
 
   if (!enable)
      CGContextSetAllowsAntialiasing(ctx, false);
}
 
//______________________________________________________________________________
CGAAStateGuard::~CGAAStateGuard()
{
   //Enable it back:
   if (!fEnable)
      CGContextSetAllowsAntialiasing(fCtx, true);
}
 
}//Quartz
}//ROOT