ru.sbtqa.monte.media.jpeg.CMYKJPEGImageReaderSpi Maven / Gradle / Ivy

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/* @(#)CMYKJPEGImageReaderSpi.java
 * Copyright © 2010-2011 Werner Randelshofer, Switzerland.
 * You may only use this software in accordance with the license terms.
 */
package ru.sbtqa.monte.media.jpeg;

import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import javax.imageio.ImageReader;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;

/**
 * A reader for JPEG images in the CMYK color space.
 *
 * @author Werner Randelshofer
 * @version 1.2 2011-02-17 Removes support for JMF.
 * 
1.0 2010-07-23 Created.
 */
public class CMYKJPEGImageReaderSpi extends ImageReaderSpi {

    public CMYKJPEGImageReaderSpi() {
        super("Werner Randelshofer",//vendor name
              "1.0",//version
              new String[]{"JPEG", "JPG"},//names
              new String[]{"jpg"},//suffixes,
              new String[]{"image/jpg"},// MIMETypes,
              "ru.sbtqa.monte.media.jpeg.CMYKJPEGImageReader",// readerClassName,
              new Class[]{ImageInputStream.class, InputStream.class, byte[].class},// inputTypes,
              null,// writerSpiNames,
              false,// supportsStandardStreamMetadataFormat,
              null,// nativeStreamMetadataFormatName,
              null,// nativeStreamMetadataFormatClassName,
              null,// extraStreamMetadataFormatNames,
              null,// extraStreamMetadataFormatClassNames,
              false,// supportsStandardImageMetadataFormat,
              null,// nativeImageMetadataFormatName,
              null,// nativeImageMetadataFormatClassName,
              null,// extraImageMetadataFormatNames,
              null// extraImageMetadataFormatClassNames
        );
    }

    @Override
    public boolean canDecodeInput(Object source) throws IOException {
        if (source instanceof ImageInputStream) {
            ImageInputStream in = (ImageInputStream) source;
            in.mark();
            // Check if file starts with a JFIF SOI magic (0xffd8=-40)
            if (in.readShort() != -40) {
                in.reset();
                return false;
            }
            in.reset();
            return true;
        }
        return false;
    }

    @Override
    public ImageReader createReaderInstance(Object extension) throws IOException {
        return new CMYKJPEGImageReader(this);
    }

    @Override
    public String getDescription(Locale locale) {
        return "CMYK JPEG Image Reader";
    }
}