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Diffstat (limited to 'java/org/libjpegturbo/turbojpeg/TJScalingFactor.java')
-rw-r--r-- | java/org/libjpegturbo/turbojpeg/TJScalingFactor.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/java/org/libjpegturbo/turbojpeg/TJScalingFactor.java b/java/org/libjpegturbo/turbojpeg/TJScalingFactor.java new file mode 100644 index 0000000..4e7363f --- /dev/null +++ b/java/org/libjpegturbo/turbojpeg/TJScalingFactor.java @@ -0,0 +1,98 @@ +/* + * 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; +}; |