86 lines
2.1 KiB
Java
86 lines
2.1 KiB
Java
//******************************************************************************
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//
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// File: PixelUnit.java
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// Package: edu.rit.image
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// Unit: Class edu.rit.image.PixelUnit
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//
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// This Java source file is copyright (C) 2013 by Alan Kaminsky. All rights
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// reserved. For further information, contact the author, Alan Kaminsky, at
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// ark@cs.rit.edu.
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//
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// This Java source file is part of the Parallel Java 2 Library ("PJ2"). PJ2 is
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// free software; you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation;
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// either version 3 of the License, or (at your option) any later version.
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//
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// PJ2 is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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//
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// A copy of the GNU General Public License is provided in the file gpl.txt. You
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// may also obtain a copy of the GNU General Public License on the World Wide
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// Web at http://www.gnu.org/licenses/gpl.html.
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//
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//******************************************************************************
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package edu.rit.image;
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/**
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* Enum PixelUnit enumerates the possible pixel dimension units in an image.
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*
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* @author Alan Kaminsky
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* @version 19-Jul-2013
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*/
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public enum PixelUnit
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{
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/**
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* Units of pixels per inch.
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*/
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PIXELS_PER_INCH (1.0/0.0254),
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/**
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* Units of pixels per centimeter.
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*/
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PIXELS_PER_CENTIMETER (100.0),
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/**
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* Units of pixels per meter.
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*/
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PIXELS_PER_METER (1.0),
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/**
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* No pixel dimension units.
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*/
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NONE (1.0);
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// Hidden data members.
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private double toPpmFactor;
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// Hidden constructors.
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private PixelUnit
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(double toPpmFactor)
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{
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this.toPpmFactor = toPpmFactor;
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}
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// Exported operations.
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/**
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* Convert the given pixel dimension from this pixel units to pixels per
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* meter.
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*
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* @param dim Pixel dimension in this pixel units.
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*
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* @return Pixel dimension in pixels per meter.
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*/
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public int toPpm
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(int dim)
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{
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return (int)(dim*toPpmFactor + 0.5);
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}
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}
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