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