org.jpedal.parser.image.downsample.DownSampler Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* DownSampler.java
* ---------------
*/
package org.jpedal.parser.image.downsample;
import org.jpedal.color.GenericColorSpace;
import org.jpedal.parser.image.data.ImageData;
/**
* @author markee
*/
public class DownSampler {
public static GenericColorSpace downSampleImage(GenericColorSpace decodeColorData,
final ImageData imageData, final byte[] maskCol, final int sampling) {
if (sampling > 1) { //safety check
imageData.setIsDownsampled(true);
switch (imageData.getDepth()) {
case 1:
decodeColorData = OneBitDownSampler.downSample(decodeColorData, maskCol, sampling, imageData);
break;
case 8:
decodeColorData = EightBitDownSampler.downSample(imageData, decodeColorData, sampling);
break;
}
}
return decodeColorData;
}
}