/*
* Copyright (c) 2012, Harald Kuhr
* 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 "TwelveMonkeys" 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 OWNER 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 com.alkacon.simapi.CmykJpegReader;
import javax.imageio.IIOException;
import javax.imageio.ImageReader;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageInputStream;
import java.awt.image.*;
import java.io.IOException;
import java.lang.ref.SoftReference;
/**
* JFXXThumbnailReader
*
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @author last modified by $Author: haraldk$
* @version $Id: JFXXThumbnailReader.java,v 1.0 18.04.12 12:19 haraldk Exp$
*/
final class JFXXThumbnailReader extends ThumbnailReader {
private final ImageReader reader;
private final JFXXSegment segment;
private transient SoftReference<BufferedImage> cachedThumbnail;
protected JFXXThumbnailReader(final ThumbnailReadProgressListener progressListener, ImageReader jpegReader, final int imageIndex, final int thumbnailIndex, final JFXXSegment segment) {
super(progressListener, imageIndex, thumbnailIndex);
this.reader = Validate.notNull(jpegReader);
this.segment = segment;
}
@Override
public BufferedImage read() throws IOException {
processThumbnailStarted();
BufferedImage thumbnail;
switch (segment.extensionCode) {
case JFXXSegment.JPEG:
thumbnail = readJPEGCached(true);
break;
case JFXXSegment.INDEXED:
thumbnail = readIndexed();
break;
case JFXXSegment.RGB:
thumbnail = readRGB();
break;
default:
throw new IIOException(String.format("Unsupported JFXX extension code: %d", segment.extensionCode));
}
processThumbnailProgress(100f);
processThumbnailComplete();
return thumbnail;
}
public IIOMetadata readMetadata() throws IOException {
ImageInputStream input = new ByteArrayImageInputStream(segment.thumbnail);
try {
reader.setInput(input);
return reader.getImageMetadata(0);
}
finally {
input.close();
}
}
private BufferedImage readJPEGCached(boolean pixelsExposed) throws IOException {
BufferedImage thumbnail = cachedThumbnail != null ? cachedThumbnail.get() : null;
if (thumbnail == null) {
ImageInputStream stream = new ByteArrayImageInputStream(segment.thumbnail);
try {
thumbnail = readJPEGThumbnail(reader, stream);
}
finally {
stream.close();
}
}
cachedThumbnail = pixelsExposed ? null : new SoftReference<BufferedImage>(thumbnail);
return thumbnail;
}
@Override
public int getWidth() throws IOException {
switch (segment.extensionCode) {
case JFXXSegment.RGB:
case JFXXSegment.INDEXED:
return segment.thumbnail[0] & 0xff;
case JFXXSegment.JPEG:
return readJPEGCached(false).getWidth();
default:
throw new IIOException(String.format("Unsupported JFXX extension code: %d", segment.extensionCode));
}
}
@Override
public int getHeight() throws IOException {
switch (segment.extensionCode) {
case JFXXSegment.RGB:
case JFXXSegment.INDEXED:
return segment.thumbnail[1] & 0xff;
case JFXXSegment.JPEG:
return readJPEGCached(false).getHeight();
default:
throw new IIOException(String.format("Unsupported JFXX extension code: %d", segment.extensionCode));
}
}
private BufferedImage readIndexed() {
// 1 byte: xThumb
// 1 byte: yThumb
// 768 bytes: palette
// x * y bytes: 8 bit indexed pixels
int w = segment.thumbnail[0] & 0xff;
int h = segment.thumbnail[1] & 0xff;
int[] rgbs = new int[256];
for (int i = 0; i < rgbs.length; i++) {
rgbs[i] = (segment.thumbnail[3 * i + 2] & 0xff) << 16
| (segment.thumbnail[3 * i + 3] & 0xff) << 8
| (segment.thumbnail[3 * i + 4] & 0xff);
}
IndexColorModel icm = new InverseColorMapIndexColorModel(8, rgbs.length, rgbs, 0, false, -1, DataBuffer.TYPE_BYTE);
DataBufferByte buffer = new DataBufferByte(segment.thumbnail, segment.thumbnail.length - 770, 770);
WritableRaster raster = Raster.createPackedRaster(buffer, w, h, 8, null);
return new BufferedImage(icm, raster, icm.isAlphaPremultiplied(), null);
}
private BufferedImage readRGB() {
// 1 byte: xThumb
// 1 byte: yThumb
// 3 * x * y bytes: 24 bit RGB pixels
int w = segment.thumbnail[0] & 0xff;
int h = segment.thumbnail[1] & 0xff;
return ThumbnailReader.readRawThumbnail(segment.thumbnail, segment.thumbnail.length - 2, 2, w, h);
}
}