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