ImageResolution.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.1.19
// ----------------------------------------------------------------------------
// pcl/ImageResolution.h - Released 2019-11-07T10:59:34Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
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// ----------------------------------------------------------------------------

#ifndef __PCL_ImageResolution_h
#define __PCL_ImageResolution_h


#include <pcl/Defs.h>
#include <pcl/Diagnostics.h>

namespace pcl
{

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

class PCL_CLASS ImageResolution
{
public:

   ImageResolution() : xResolution( 72 ), yResolution( 72 ), metric( false )
   {
   }

   ImageResolution( const ImageResolution& x )
   {
      (void)operator =( x );
   }

   ImageResolution& operator =( const ImageResolution& x )
   {
      xResolution = x.xResolution;
      yResolution = x.yResolution;
      metric      = x.metric;
      return *this;
   }

   void GetResolution( double& x, double& y )
   {
      x = xResolution; y = yResolution;
   }

   double HorizontalResolution() const
   {
      return xResolution;
   }

   double VerticalResolution() const
   {
      return yResolution;
   }

   void SetResolution( double x, double y )
   {
      PCL_PRECONDITION( x >= 0 )
      PCL_PRECONDITION( y >= 0 )
      xResolution = pcl::Max( 0.0, x ); yResolution = pcl::Max( 0.0, y );
   }

   double Resolution() const
   {
      return xResolution;
   }

   void SetResolution( double r )
   {
      PCL_PRECONDITION( r >= 0 )
      xResolution = yResolution = pcl::Max( 0.0, r );
   }

   bool IsMetricResolution() const
   {
      return metric;
   }

   void SetMetricResolution( bool m )
   {
      metric = m;
   }

protected:

   /*
    * Resolution in pixels per resolution unit (centimeters or inches).
    */
   double xResolution;
   double yResolution;

   /*
    * Flag true when resolution values are expressed in pixels per centimeter.
    * Pixels per inch otherwise.
    */
   bool   metric;
};

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

} // pcl

#endif   // __PCL_ImageResolution_h

// ----------------------------------------------------------------------------
// EOF pcl/ImageResolution.h - Released 2019-11-07T10:59:34Z