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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
/**
* Fractional scaling factor
*/
public class TJScalingFactor {
public TJScalingFactor(int num, int denom) throws Exception {
if(num < 1 || denom < 1)
throw new Exception("Numerator and denominator must be >= 1");
this.num = num;
this.denom = denom;
}
/**
* Returns numerator
* @return numerator
*/
public int getNum() {
return num;
}
/**
* Returns denominator
* @return denominator
*/
public int getDenom() {
return denom;
}
/**
* Returns the scaled value of <code>dimension</code>. This function
* performs the integer equivalent of
* <code>ceil(dimension * scalingFactor)</code>.
* @return the scaled value of <code>dimension</code>
*/
public int getScaled(int dimension) {
return (dimension * num + denom - 1) / denom;
}
/**
* Returns true or false, depending on whether this instance and
* <code>other</code> have the same numerator and denominator.
* @return true or false, depending on whether this instance and
* <code>other</code> have the same numerator and denominator
*/
public boolean equals(TJScalingFactor other) {
return (this.num == other.num && this.denom == other.denom);
}
/**
* Returns true or false, depending on whether this instance is equal to
* 1/1.
* @return true or false, depending on whether this instance is equal to
* 1/1
*/
public boolean isOne() {
return (num == 1 && denom == 1);
}
/**
* Numerator
*/
private int num = 1;
/**
* Denominator
*/
private int denom = 1;
};
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