1 /*
2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.imageio.plugins.jpeg;
27
28 import javax.imageio.IIOException;
29 import javax.imageio.ImageWriter;
30 import javax.imageio.ImageWriteParam;
31 import javax.imageio.IIOImage;
32 import javax.imageio.ImageTypeSpecifier;
33 import javax.imageio.metadata.IIOMetadata;
34 import javax.imageio.metadata.IIOMetadataFormatImpl;
35 import javax.imageio.metadata.IIOInvalidTreeException;
36 import javax.imageio.spi.ImageWriterSpi;
37 import javax.imageio.stream.ImageOutputStream;
38 import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
39 import javax.imageio.plugins.jpeg.JPEGQTable;
40 import javax.imageio.plugins.jpeg.JPEGHuffmanTable;
41
42 import org.w3c.dom.Node;
43
44 import java.awt.image.Raster;
45 import java.awt.image.WritableRaster;
46 import java.awt.image.SampleModel;
47 import java.awt.image.DataBuffer;
48 import java.awt.image.DataBufferByte;
49 import java.awt.image.ColorModel;
50 import java.awt.image.IndexColorModel;
51 import java.awt.image.ColorConvertOp;
52 import java.awt.image.RenderedImage;
53 import java.awt.image.BufferedImage;
54 import java.awt.color.ColorSpace;
55 import java.awt.color.ICC_ColorSpace;
56 import java.awt.color.ICC_Profile;
57 import java.awt.Dimension;
58 import java.awt.Rectangle;
59 import java.awt.Transparency;
60
61 import java.io.IOException;
62
63 import java.util.List;
64 import java.util.ArrayList;
65 import java.util.Iterator;
66
67 import sun.java2d.Disposer;
68 import sun.java2d.DisposerRecord;
69
70 public class JPEGImageWriter extends ImageWriter {
71
72 ///////// Private variables
73
74 private boolean debug = false;
75
76 /**
77 * The following variable contains a pointer to the IJG library
78 * structure for this reader. It is assigned in the constructor
79 * and then is passed in to every native call. It is set to 0
80 * by dispose to avoid disposing twice.
81 */
82 private long structPointer = 0;
83
84
85 /** The output stream we write to */
86 private ImageOutputStream ios = null;
87
88 /** The Raster we will write from */
89 private Raster srcRas = null;
90
91 /** An intermediate Raster holding compressor-friendly data */
92 private WritableRaster raster = null;
93
94 /**
95 * Set to true if we are writing an image with an
96 * indexed ColorModel
97 */
98 private boolean indexed = false;
99 private IndexColorModel indexCM = null;
100
101 private boolean convertTosRGB = false; // Used by PhotoYCC only
102 private WritableRaster converted = null;
103
104 private boolean isAlphaPremultiplied = false;
105 private ColorModel srcCM = null;
106
107 /**
108 * If there are thumbnails to be written, this is the list.
109 */
110 private List<? extends BufferedImage> thumbnails = null;
111
112 /**
113 * If metadata should include an icc profile, store it here.
114 */
115 private ICC_Profile iccProfile = null;
116
117 private int sourceXOffset = 0;
118 private int sourceYOffset = 0;
119 private int sourceWidth = 0;
120 private int [] srcBands = null;
121 private int sourceHeight = 0;
122
123 /** Used when calling listeners */
124 private int currentImage = 0;
125
126 private ColorConvertOp convertOp = null;
127
128 private JPEGQTable [] streamQTables = null;
129 private JPEGHuffmanTable[] streamDCHuffmanTables = null;
130 private JPEGHuffmanTable[] streamACHuffmanTables = null;
131
132 // Parameters for writing metadata
133 private boolean ignoreJFIF = false; // If it's there, use it
134 private boolean forceJFIF = false; // Add one for the thumbnails
135 private boolean ignoreAdobe = false; // If it's there, use it
136 private int newAdobeTransform = JPEG.ADOBE_IMPOSSIBLE; // Change if needed
137 private boolean writeDefaultJFIF = false;
138 private boolean writeAdobe = false;
139 private JPEGMetadata metadata = null;
140
141 private boolean sequencePrepared = false;
142
143 private int numScans = 0;
144
145 /** The referent to be registered with the Disposer. */
146 private Object disposerReferent = new Object();
147
148 /** The DisposerRecord that handles the actual disposal of this writer. */
149 private DisposerRecord disposerRecord;
150
151 ///////// End of Private variables
152
153 ///////// Protected variables
154
155 protected static final int WARNING_DEST_IGNORED = 0;
156 protected static final int WARNING_STREAM_METADATA_IGNORED = 1;
157 protected static final int WARNING_DEST_METADATA_COMP_MISMATCH = 2;
158 protected static final int WARNING_DEST_METADATA_JFIF_MISMATCH = 3;
159 protected static final int WARNING_DEST_METADATA_ADOBE_MISMATCH = 4;
160 protected static final int WARNING_IMAGE_METADATA_JFIF_MISMATCH = 5;
161 protected static final int WARNING_IMAGE_METADATA_ADOBE_MISMATCH = 6;
162 protected static final int WARNING_METADATA_NOT_JPEG_FOR_RASTER = 7;
163 protected static final int WARNING_NO_BANDS_ON_INDEXED = 8;
164 protected static final int WARNING_ILLEGAL_THUMBNAIL = 9;
165 protected static final int WARNING_IGNORING_THUMBS = 10;
166 protected static final int WARNING_FORCING_JFIF = 11;
167 protected static final int WARNING_THUMB_CLIPPED = 12;
168 protected static final int WARNING_METADATA_ADJUSTED_FOR_THUMB = 13;
169 protected static final int WARNING_NO_RGB_THUMB_AS_INDEXED = 14;
170 protected static final int WARNING_NO_GRAY_THUMB_AS_INDEXED = 15;
171
172 private static final int MAX_WARNING = WARNING_NO_GRAY_THUMB_AS_INDEXED;
173
174 ///////// End of Protected variables
175
176 ///////// static initializer
177
178 static {
179 java.security.AccessController.doPrivileged(
180 new java.security.PrivilegedAction<Void>() {
181 public Void run() {
182 System.loadLibrary("javajpeg");
183 return null;
184 }
185 });
186 initWriterIDs(JPEGQTable.class,
187 JPEGHuffmanTable.class);
188 }
189
190 //////// Public API
191
192 public JPEGImageWriter(ImageWriterSpi originator) {
193 super(originator);
194 structPointer = initJPEGImageWriter();
195 disposerRecord = new JPEGWriterDisposerRecord(structPointer);
196 Disposer.addRecord(disposerReferent, disposerRecord);
197 }
198
199 public void setOutput(Object output) {
200 setThreadLock();
201 try {
202 cbLock.check();
203
204 super.setOutput(output); // validates output
205 resetInternalState();
206 ios = (ImageOutputStream) output; // so this will always work
207 // Set the native destination
208 setDest(structPointer);
209 } finally {
210 clearThreadLock();
211 }
212 }
213
214 public ImageWriteParam getDefaultWriteParam() {
215 return new JPEGImageWriteParam(null);
216 }
217
218 public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) {
219 setThreadLock();
220 try {
221 return new JPEGMetadata(param, this);
222 } finally {
223 clearThreadLock();
224 }
225 }
226
227 public IIOMetadata
228 getDefaultImageMetadata(ImageTypeSpecifier imageType,
229 ImageWriteParam param) {
230 setThreadLock();
231 try {
232 return new JPEGMetadata(imageType, param, this);
233 } finally {
234 clearThreadLock();
235 }
236 }
237
238 public IIOMetadata convertStreamMetadata(IIOMetadata inData,
239 ImageWriteParam param) {
240 // There isn't much we can do. If it's one of ours, then
241 // return it. Otherwise just return null. We use it only
242 // for tables, so we can't get a default and modify it,
243 // as this will usually not be what is intended.
244 if (inData instanceof JPEGMetadata) {
245 JPEGMetadata jpegData = (JPEGMetadata) inData;
246 if (jpegData.isStream) {
247 return inData;
248 }
249 }
250 return null;
251 }
252
253 public IIOMetadata
254 convertImageMetadata(IIOMetadata inData,
255 ImageTypeSpecifier imageType,
256 ImageWriteParam param) {
257 setThreadLock();
258 try {
259 return convertImageMetadataOnThread(inData, imageType, param);
260 } finally {
261 clearThreadLock();
262 }
263 }
264
265 private IIOMetadata
266 convertImageMetadataOnThread(IIOMetadata inData,
267 ImageTypeSpecifier imageType,
268 ImageWriteParam param) {
269 // If it's one of ours, just return it
270 if (inData instanceof JPEGMetadata) {
271 JPEGMetadata jpegData = (JPEGMetadata) inData;
272 if (!jpegData.isStream) {
273 return inData;
274 } else {
275 // Can't convert stream metadata to image metadata
276 // XXX Maybe this should put out a warning?
277 return null;
278 }
279 }
280 // If it's not one of ours, create a default and set it from
281 // the standard tree from the input, if it exists.
282 if (inData.isStandardMetadataFormatSupported()) {
283 String formatName =
284 IIOMetadataFormatImpl.standardMetadataFormatName;
285 Node tree = inData.getAsTree(formatName);
286 if (tree != null) {
287 JPEGMetadata jpegData = new JPEGMetadata(imageType,
288 param,
289 this);
290 try {
291 jpegData.setFromTree(formatName, tree);
292 } catch (IIOInvalidTreeException e) {
293 // Other plug-in generates bogus standard tree
294 // XXX Maybe this should put out a warning?
295 return null;
296 }
297
298 return jpegData;
299 }
300 }
301 return null;
302 }
303
304 public int getNumThumbnailsSupported(ImageTypeSpecifier imageType,
305 ImageWriteParam param,
306 IIOMetadata streamMetadata,
307 IIOMetadata imageMetadata) {
308 if (jfifOK(imageType, param, streamMetadata, imageMetadata)) {
309 return Integer.MAX_VALUE;
310 }
311 return 0;
312 }
313
314 static final Dimension [] preferredThumbSizes = {new Dimension(1, 1),
315 new Dimension(255, 255)};
316
317 public Dimension[] getPreferredThumbnailSizes(ImageTypeSpecifier imageType,
318 ImageWriteParam param,
319 IIOMetadata streamMetadata,
320 IIOMetadata imageMetadata) {
321 if (jfifOK(imageType, param, streamMetadata, imageMetadata)) {
322 return preferredThumbSizes.clone();
323 }
324 return null;
325 }
326
327 private boolean jfifOK(ImageTypeSpecifier imageType,
328 ImageWriteParam param,
329 IIOMetadata streamMetadata,
330 IIOMetadata imageMetadata) {
331 // If the image type and metadata are JFIF compatible, return true
332 if ((imageType != null) &&
333 (!JPEG.isJFIFcompliant(imageType, true))) {
334 return false;
335 }
336 if (imageMetadata != null) {
337 JPEGMetadata metadata = null;
338 if (imageMetadata instanceof JPEGMetadata) {
339 metadata = (JPEGMetadata) imageMetadata;
340 } else {
341 metadata = (JPEGMetadata)convertImageMetadata(imageMetadata,
342 imageType,
343 param);
344 }
345 // metadata must have a jfif node
346 if (metadata.findMarkerSegment
347 (JFIFMarkerSegment.class, true) == null){
348 return false;
349 }
350 }
351 return true;
352 }
353
354 public boolean canWriteRasters() {
355 return true;
356 }
357
358 public void write(IIOMetadata streamMetadata,
359 IIOImage image,
360 ImageWriteParam param) throws IOException {
361 setThreadLock();
362 try {
363 cbLock.check();
364
365 writeOnThread(streamMetadata, image, param);
366 } finally {
367 clearThreadLock();
368 }
369 }
370
371 private void writeOnThread(IIOMetadata streamMetadata,
372 IIOImage image,
373 ImageWriteParam param) throws IOException {
374
375 if (ios == null) {
376 throw new IllegalStateException("Output has not been set!");
377 }
378
379 if (image == null) {
380 throw new IllegalArgumentException("image is null!");
381 }
382
383 // if streamMetadata is not null, issue a warning
384 if (streamMetadata != null) {
385 warningOccurred(WARNING_STREAM_METADATA_IGNORED);
386 }
387
388 // Obtain the raster and image, if there is one
389 boolean rasterOnly = image.hasRaster();
390
391 RenderedImage rimage = null;
392 if (rasterOnly) {
393 srcRas = image.getRaster();
394 } else {
395 rimage = image.getRenderedImage();
396 if (rimage instanceof BufferedImage) {
397 // Use the Raster directly.
398 srcRas = ((BufferedImage)rimage).getRaster();
399 } else if (rimage.getNumXTiles() == 1 &&
400 rimage.getNumYTiles() == 1)
401 {
402 // Get the unique tile.
403 srcRas = rimage.getTile(rimage.getMinTileX(),
404 rimage.getMinTileY());
405
406 // Ensure the Raster has dimensions of the image,
407 // as the tile dimensions might differ.
408 if (srcRas.getWidth() != rimage.getWidth() ||
409 srcRas.getHeight() != rimage.getHeight())
410 {
411 srcRas = srcRas.createChild(srcRas.getMinX(),
412 srcRas.getMinY(),
413 rimage.getWidth(),
414 rimage.getHeight(),
415 srcRas.getMinX(),
416 srcRas.getMinY(),
417 null);
418 }
419 } else {
420 // Image is tiled so get a contiguous raster by copying.
421 srcRas = rimage.getData();
422 }
423 }
424
425 // Now determine if we are using a band subset
426
427 // By default, we are using all source bands
428 int numSrcBands = srcRas.getNumBands();
429 indexed = false;
430 indexCM = null;
431 ColorModel cm = null;
432 ColorSpace cs = null;
433 isAlphaPremultiplied = false;
434 srcCM = null;
435 if (!rasterOnly) {
436 cm = rimage.getColorModel();
437 if (cm != null) {
438 cs = cm.getColorSpace();
439 if (cm instanceof IndexColorModel) {
440 indexed = true;
441 indexCM = (IndexColorModel) cm;
442 numSrcBands = cm.getNumComponents();
443 }
444 if (cm.isAlphaPremultiplied()) {
445 isAlphaPremultiplied = true;
446 srcCM = cm;
447 }
448 }
449 }
450
451 srcBands = JPEG.bandOffsets[numSrcBands-1];
452 int numBandsUsed = numSrcBands;
453 // Consult the param to determine if we're writing a subset
454
455 if (param != null) {
456 int[] sBands = param.getSourceBands();
457 if (sBands != null) {
458 if (indexed) {
459 warningOccurred(WARNING_NO_BANDS_ON_INDEXED);
460 } else {
461 srcBands = sBands;
462 numBandsUsed = srcBands.length;
463 if (numBandsUsed > numSrcBands) {
464 throw new IIOException
465 ("ImageWriteParam specifies too many source bands");
466 }
467 }
468 }
469 }
470
471 boolean usingBandSubset = (numBandsUsed != numSrcBands);
472 boolean fullImage = ((!rasterOnly) && (!usingBandSubset));
473
474 int [] bandSizes = null;
475 if (!indexed) {
476 bandSizes = srcRas.getSampleModel().getSampleSize();
477 // If this is a subset, we must adjust bandSizes
478 if (usingBandSubset) {
479 int [] temp = new int [numBandsUsed];
480 for (int i = 0; i < numBandsUsed; i++) {
481 temp[i] = bandSizes[srcBands[i]];
482 }
483 bandSizes = temp;
484 }
485 } else {
486 int [] tempSize = srcRas.getSampleModel().getSampleSize();
487 bandSizes = new int [numSrcBands];
488 for (int i = 0; i < numSrcBands; i++) {
489 bandSizes[i] = tempSize[0]; // All the same
490 }
491 }
492
493 for (int i = 0; i < bandSizes.length; i++) {
494 // 4450894 part 1: The IJG libraries are compiled so they only
495 // handle <= 8-bit samples. We now check the band sizes and throw
496 // an exception for images, such as USHORT_GRAY, with > 8 bits
497 // per sample.
498 if (bandSizes[i] <= 0 || bandSizes[i] > 8) {
499 throw new IIOException("Illegal band size: should be 0 < size <= 8");
500 }
501 // 4450894 part 2: We expand IndexColorModel images to full 24-
502 // or 32-bit in grabPixels() for each scanline. For indexed
503 // images such as BYTE_BINARY, we need to ensure that we update
504 // bandSizes to account for the scaling from 1-bit band sizes
505 // to 8-bit.
506 if (indexed) {
507 bandSizes[i] = 8;
508 }
509 }
510
511 if (debug) {
512 System.out.println("numSrcBands is " + numSrcBands);
513 System.out.println("numBandsUsed is " + numBandsUsed);
514 System.out.println("usingBandSubset is " + usingBandSubset);
515 System.out.println("fullImage is " + fullImage);
516 System.out.print("Band sizes:");
517 for (int i = 0; i< bandSizes.length; i++) {
518 System.out.print(" " + bandSizes[i]);
519 }
520 System.out.println();
521 }
522
523 // Destination type, if there is one
524 ImageTypeSpecifier destType = null;
525 if (param != null) {
526 destType = param.getDestinationType();
527 // Ignore dest type if we are writing a complete image
528 if ((fullImage) && (destType != null)) {
529 warningOccurred(WARNING_DEST_IGNORED);
530 destType = null;
531 }
532 }
533
534 // Examine the param
535
536 sourceXOffset = srcRas.getMinX();
537 sourceYOffset = srcRas.getMinY();
538 int imageWidth = srcRas.getWidth();
539 int imageHeight = srcRas.getHeight();
540 sourceWidth = imageWidth;
541 sourceHeight = imageHeight;
542 int periodX = 1;
543 int periodY = 1;
544 int gridX = 0;
545 int gridY = 0;
546 JPEGQTable [] qTables = null;
547 JPEGHuffmanTable[] DCHuffmanTables = null;
548 JPEGHuffmanTable[] ACHuffmanTables = null;
549 boolean optimizeHuffman = false;
550 JPEGImageWriteParam jparam = null;
551 int progressiveMode = ImageWriteParam.MODE_DISABLED;
552
553 if (param != null) {
554
555 Rectangle sourceRegion = param.getSourceRegion();
556 if (sourceRegion != null) {
557 Rectangle imageBounds = new Rectangle(sourceXOffset,
558 sourceYOffset,
559 sourceWidth,
560 sourceHeight);
561 sourceRegion = sourceRegion.intersection(imageBounds);
562 sourceXOffset = sourceRegion.x;
563 sourceYOffset = sourceRegion.y;
564 sourceWidth = sourceRegion.width;
565 sourceHeight = sourceRegion.height;
566 }
567
568 if (sourceWidth + sourceXOffset > imageWidth) {
569 sourceWidth = imageWidth - sourceXOffset;
570 }
571 if (sourceHeight + sourceYOffset > imageHeight) {
572 sourceHeight = imageHeight - sourceYOffset;
573 }
574
575 periodX = param.getSourceXSubsampling();
576 periodY = param.getSourceYSubsampling();
577 gridX = param.getSubsamplingXOffset();
578 gridY = param.getSubsamplingYOffset();
579
580 switch(param.getCompressionMode()) {
581 case ImageWriteParam.MODE_DISABLED:
582 throw new IIOException("JPEG compression cannot be disabled");
583 case ImageWriteParam.MODE_EXPLICIT:
584 float quality = param.getCompressionQuality();
585 quality = JPEG.convertToLinearQuality(quality);
586 qTables = new JPEGQTable[2];
587 qTables[0] = JPEGQTable.K1Luminance.getScaledInstance
588 (quality, true);
589 qTables[1] = JPEGQTable.K2Chrominance.getScaledInstance
590 (quality, true);
591 break;
592 case ImageWriteParam.MODE_DEFAULT:
593 qTables = new JPEGQTable[2];
594 qTables[0] = JPEGQTable.K1Div2Luminance;
595 qTables[1] = JPEGQTable.K2Div2Chrominance;
596 break;
597 // We'll handle the metadata case later
598 }
599
600 progressiveMode = param.getProgressiveMode();
601
602 if (param instanceof JPEGImageWriteParam) {
603 jparam = (JPEGImageWriteParam)param;
604 optimizeHuffman = jparam.getOptimizeHuffmanTables();
605 }
606 }
607
608 // Now examine the metadata
609 IIOMetadata mdata = image.getMetadata();
610 if (mdata != null) {
611 if (mdata instanceof JPEGMetadata) {
612 metadata = (JPEGMetadata) mdata;
613 if (debug) {
614 System.out.println
615 ("We have metadata, and it's JPEG metadata");
616 }
617 } else {
618 if (!rasterOnly) {
619 ImageTypeSpecifier type = destType;
620 if (type == null) {
621 type = new ImageTypeSpecifier(rimage);
622 }
623 metadata = (JPEGMetadata) convertImageMetadata(mdata,
624 type,
625 param);
626 } else {
627 warningOccurred(WARNING_METADATA_NOT_JPEG_FOR_RASTER);
628 }
629 }
630 }
631
632 // First set a default state
633
634 ignoreJFIF = false; // If it's there, use it
635 ignoreAdobe = false; // If it's there, use it
636 newAdobeTransform = JPEG.ADOBE_IMPOSSIBLE; // Change if needed
637 writeDefaultJFIF = false;
638 writeAdobe = false;
639
640 // By default we'll do no conversion:
641 int inCsType = JPEG.JCS_UNKNOWN;
642 int outCsType = JPEG.JCS_UNKNOWN;
643
644 JFIFMarkerSegment jfif = null;
645 AdobeMarkerSegment adobe = null;
646 SOFMarkerSegment sof = null;
647
648 if (metadata != null) {
649 jfif = (JFIFMarkerSegment) metadata.findMarkerSegment
650 (JFIFMarkerSegment.class, true);
651 adobe = (AdobeMarkerSegment) metadata.findMarkerSegment
652 (AdobeMarkerSegment.class, true);
653 sof = (SOFMarkerSegment) metadata.findMarkerSegment
654 (SOFMarkerSegment.class, true);
655 }
656
657 iccProfile = null; // By default don't write one
658 convertTosRGB = false; // PhotoYCC does this
659 converted = null;
660
661 if (destType != null) {
662 if (numBandsUsed != destType.getNumBands()) {
663 throw new IIOException
664 ("Number of source bands != number of destination bands");
665 }
666 cs = destType.getColorModel().getColorSpace();
667 // Check the metadata against the destination type
668 if (metadata != null) {
669 checkSOFBands(sof, numBandsUsed);
670
671 checkJFIF(jfif, destType, false);
672 // Do we want to write an ICC profile?
673 if ((jfif != null) && (ignoreJFIF == false)) {
674 if (JPEG.isNonStandardICC(cs)) {
675 iccProfile = ((ICC_ColorSpace) cs).getProfile();
676 }
677 }
678 checkAdobe(adobe, destType, false);
679
680 } else { // no metadata, but there is a dest type
681 // If we can add a JFIF or an Adobe marker segment, do so
682 if (JPEG.isJFIFcompliant(destType, false)) {
683 writeDefaultJFIF = true;
684 // Do we want to write an ICC profile?
685 if (JPEG.isNonStandardICC(cs)) {
686 iccProfile = ((ICC_ColorSpace) cs).getProfile();
687 }
688 } else {
689 int transform = JPEG.transformForType(destType, false);
690 if (transform != JPEG.ADOBE_IMPOSSIBLE) {
691 writeAdobe = true;
692 newAdobeTransform = transform;
693 }
694 }
695 // re-create the metadata
696 metadata = new JPEGMetadata(destType, null, this);
697 }
698 inCsType = getSrcCSType(destType);
699 outCsType = getDefaultDestCSType(destType);
700 } else { // no destination type
701 if (metadata == null) {
702 if (fullImage) { // no dest, no metadata, full image
703 // Use default metadata matching the image and param
704 metadata = new JPEGMetadata(new ImageTypeSpecifier(rimage),
705 param, this);
706 if (metadata.findMarkerSegment
707 (JFIFMarkerSegment.class, true) != null) {
708 cs = rimage.getColorModel().getColorSpace();
709 if (JPEG.isNonStandardICC(cs)) {
710 iccProfile = ((ICC_ColorSpace) cs).getProfile();
711 }
712 }
713
714 inCsType = getSrcCSType(rimage);
715 outCsType = getDefaultDestCSType(rimage);
716 }
717 // else no dest, no metadata, not an image,
718 // so no special headers, no color conversion
719 } else { // no dest type, but there is metadata
720 checkSOFBands(sof, numBandsUsed);
721 if (fullImage) { // no dest, metadata, image
722 // Check that the metadata and the image match
723
724 ImageTypeSpecifier inputType =
725 new ImageTypeSpecifier(rimage);
726
727 inCsType = getSrcCSType(rimage);
728
729 if (cm != null) {
730 boolean alpha = cm.hasAlpha();
731 switch (cs.getType()) {
732 case ColorSpace.TYPE_GRAY:
733 if (!alpha) {
734 outCsType = JPEG.JCS_GRAYSCALE;
735 } else {
736 if (jfif != null) {
737 ignoreJFIF = true;
738 warningOccurred
739 (WARNING_IMAGE_METADATA_JFIF_MISMATCH);
740 }
741 // out colorspace remains unknown
742 }
743 if ((adobe != null)
744 && (adobe.transform != JPEG.ADOBE_UNKNOWN)) {
745 newAdobeTransform = JPEG.ADOBE_UNKNOWN;
746 warningOccurred
747 (WARNING_IMAGE_METADATA_ADOBE_MISMATCH);
748 }
749 break;
750 case ColorSpace.TYPE_RGB:
751 if (!alpha) {
752 if (jfif != null) {
753 outCsType = JPEG.JCS_YCbCr;
754 if (JPEG.isNonStandardICC(cs)
755 || ((cs instanceof ICC_ColorSpace)
756 && (jfif.iccSegment != null))) {
757 iccProfile =
758 ((ICC_ColorSpace) cs).getProfile();
759 }
760 } else if (adobe != null) {
761 switch (adobe.transform) {
762 case JPEG.ADOBE_UNKNOWN:
763 outCsType = JPEG.JCS_RGB;
764 break;
765 case JPEG.ADOBE_YCC:
766 outCsType = JPEG.JCS_YCbCr;
767 break;
768 default:
769 warningOccurred
770 (WARNING_IMAGE_METADATA_ADOBE_MISMATCH);
771 newAdobeTransform = JPEG.ADOBE_UNKNOWN;
772 outCsType = JPEG.JCS_RGB;
773 break;
774 }
775 } else {
776 // consult the ids
777 int outCS = sof.getIDencodedCSType();
778 // if they don't resolve it,
779 // consult the sampling factors
780 if (outCS != JPEG.JCS_UNKNOWN) {
781 outCsType = outCS;
782 } else {
783 boolean subsampled =
784 isSubsampled(sof.componentSpecs);
785 if (subsampled) {
786 outCsType = JPEG.JCS_YCbCr;
787 } else {
788 outCsType = JPEG.JCS_RGB;
789 }
790 }
791 }
792 } else { // RGBA
793 if (jfif != null) {
794 ignoreJFIF = true;
795 warningOccurred
796 (WARNING_IMAGE_METADATA_JFIF_MISMATCH);
797 }
798 if (adobe != null) {
799 if (adobe.transform
800 != JPEG.ADOBE_UNKNOWN) {
801 newAdobeTransform = JPEG.ADOBE_UNKNOWN;
802 warningOccurred
803 (WARNING_IMAGE_METADATA_ADOBE_MISMATCH);
804 }
805 outCsType = JPEG.JCS_RGBA;
806 } else {
807 // consult the ids
808 int outCS = sof.getIDencodedCSType();
809 // if they don't resolve it,
810 // consult the sampling factors
811 if (outCS != JPEG.JCS_UNKNOWN) {
812 outCsType = outCS;
813 } else {
814 boolean subsampled =
815 isSubsampled(sof.componentSpecs);
816 outCsType = subsampled ?
817 JPEG.JCS_YCbCrA : JPEG.JCS_RGBA;
818 }
819 }
820 }
821 break;
822 case ColorSpace.TYPE_3CLR:
823 if (cs == JPEG.JCS.getYCC()) {
824 if (!alpha) {
825 if (jfif != null) {
826 convertTosRGB = true;
827 convertOp =
828 new ColorConvertOp(cs,
829 JPEG.JCS.sRGB,
830 null);
831 outCsType = JPEG.JCS_YCbCr;
832 } else if (adobe != null) {
833 if (adobe.transform
834 != JPEG.ADOBE_YCC) {
835 newAdobeTransform = JPEG.ADOBE_YCC;
836 warningOccurred
837 (WARNING_IMAGE_METADATA_ADOBE_MISMATCH);
838 }
839 outCsType = JPEG.JCS_YCC;
840 } else {
841 outCsType = JPEG.JCS_YCC;
842 }
843 } else { // PhotoYCCA
844 if (jfif != null) {
845 ignoreJFIF = true;
846 warningOccurred
847 (WARNING_IMAGE_METADATA_JFIF_MISMATCH);
848 } else if (adobe != null) {
849 if (adobe.transform
850 != JPEG.ADOBE_UNKNOWN) {
851 newAdobeTransform
852 = JPEG.ADOBE_UNKNOWN;
853 warningOccurred
854 (WARNING_IMAGE_METADATA_ADOBE_MISMATCH);
855 }
856 }
857 outCsType = JPEG.JCS_YCCA;
858 }
859 }
860 }
861 }
862 } // else no dest, metadata, not an image. Defaults ok
863 }
864 }
865
866 boolean metadataProgressive = false;
867 int [] scans = null;
868
869 if (metadata != null) {
870 if (sof == null) {
871 sof = (SOFMarkerSegment) metadata.findMarkerSegment
872 (SOFMarkerSegment.class, true);
873 }
874 if ((sof != null) && (sof.tag == JPEG.SOF2)) {
875 metadataProgressive = true;
876 if (progressiveMode == ImageWriteParam.MODE_COPY_FROM_METADATA) {
877 scans = collectScans(metadata, sof); // Might still be null
878 } else {
879 numScans = 0;
880 }
881 }
882 if (jfif == null) {
883 jfif = (JFIFMarkerSegment) metadata.findMarkerSegment
884 (JFIFMarkerSegment.class, true);
885 }
886 }
887
888 thumbnails = image.getThumbnails();
889 int numThumbs = image.getNumThumbnails();
890 forceJFIF = false;
891 // determine if thumbnails can be written
892 // If we are going to add a default JFIF marker segment,
893 // then thumbnails can be written
894 if (!writeDefaultJFIF) {
895 // If there is no metadata, then we can't write thumbnails
896 if (metadata == null) {
897 thumbnails = null;
898 if (numThumbs != 0) {
899 warningOccurred(WARNING_IGNORING_THUMBS);
900 }
901 } else {
902 // There is metadata
903 // If we are writing a raster or subbands,
904 // then the user must specify JFIF on the metadata
905 if (fullImage == false) {
906 if (jfif == null) {
907 thumbnails = null; // Or we can't include thumbnails
908 if (numThumbs != 0) {
909 warningOccurred(WARNING_IGNORING_THUMBS);
910 }
911 }
912 } else { // It is a full image, and there is metadata
913 if (jfif == null) { // Not JFIF
914 // Can it have JFIF?
915 if ((outCsType == JPEG.JCS_GRAYSCALE)
916 || (outCsType == JPEG.JCS_YCbCr)) {
917 if (numThumbs != 0) {
918 forceJFIF = true;
919 warningOccurred(WARNING_FORCING_JFIF);
920 }
921 } else { // Nope, not JFIF-compatible
922 thumbnails = null;
923 if (numThumbs != 0) {
924 warningOccurred(WARNING_IGNORING_THUMBS);
925 }
926 }
927 }
928 }
929 }
930 }
931
932 // Set up a boolean to indicate whether we need to call back to
933 // write metadata
934 boolean haveMetadata =
935 ((metadata != null) || writeDefaultJFIF || writeAdobe);
936
937 // Now that we have dealt with metadata, finalize our tables set up
938
939 // Are we going to write tables? By default, yes.
940 boolean writeDQT = true;
941 boolean writeDHT = true;
942
943 // But if the metadata has no tables, no.
944 DQTMarkerSegment dqt = null;
945 DHTMarkerSegment dht = null;
946
947 int restartInterval = 0;
948
949 if (metadata != null) {
950 dqt = (DQTMarkerSegment) metadata.findMarkerSegment
951 (DQTMarkerSegment.class, true);
952 dht = (DHTMarkerSegment) metadata.findMarkerSegment
953 (DHTMarkerSegment.class, true);
954 DRIMarkerSegment dri =
955 (DRIMarkerSegment) metadata.findMarkerSegment
956 (DRIMarkerSegment.class, true);
957 if (dri != null) {
958 restartInterval = dri.restartInterval;
959 }
960
961 if (dqt == null) {
962 writeDQT = false;
963 }
964 if (dht == null) {
965 writeDHT = false; // Ignored if optimizeHuffman is true
966 }
967 }
968
969 // Whether we write tables or not, we need to figure out which ones
970 // to use
971 if (qTables == null) { // Get them from metadata, or use defaults
972 if (dqt != null) {
973 qTables = collectQTablesFromMetadata(metadata);
974 } else if (streamQTables != null) {
975 qTables = streamQTables;
976 } else if ((jparam != null) && (jparam.areTablesSet())) {
977 qTables = jparam.getQTables();
978 } else {
979 qTables = JPEG.getDefaultQTables();
980 }
981
982 }
983
984 // If we are optimizing, we don't want any tables.
985 if (optimizeHuffman == false) {
986 // If they were for progressive scans, we can't use them.
987 if ((dht != null) && (metadataProgressive == false)) {
988 DCHuffmanTables = collectHTablesFromMetadata(metadata, true);
989 ACHuffmanTables = collectHTablesFromMetadata(metadata, false);
990 } else if (streamDCHuffmanTables != null) {
991 DCHuffmanTables = streamDCHuffmanTables;
992 ACHuffmanTables = streamACHuffmanTables;
993 } else if ((jparam != null) && (jparam.areTablesSet())) {
994 DCHuffmanTables = jparam.getDCHuffmanTables();
995 ACHuffmanTables = jparam.getACHuffmanTables();
996 } else {
997 DCHuffmanTables = JPEG.getDefaultHuffmanTables(true);
998 ACHuffmanTables = JPEG.getDefaultHuffmanTables(false);
999 }
1000 }
1001
1002 // By default, ids are 1 - N, no subsampling
1003 int [] componentIds = new int[numBandsUsed];
1004 int [] HsamplingFactors = new int[numBandsUsed];
1005 int [] VsamplingFactors = new int[numBandsUsed];
1006 int [] QtableSelectors = new int[numBandsUsed];
1007 for (int i = 0; i < numBandsUsed; i++) {
1008 componentIds[i] = i+1; // JFIF compatible
1009 HsamplingFactors[i] = 1;
1010 VsamplingFactors[i] = 1;
1011 QtableSelectors[i] = 0;
1012 }
1013
1014 // Now override them with the contents of sof, if there is one,
1015 if (sof != null) {
1016 for (int i = 0; i < numBandsUsed; i++) {
1017 if (forceJFIF == false) { // else use JFIF-compatible default
1018 componentIds[i] = sof.componentSpecs[i].componentId;
1019 }
1020 HsamplingFactors[i] = sof.componentSpecs[i].HsamplingFactor;
1021 VsamplingFactors[i] = sof.componentSpecs[i].VsamplingFactor;
1022 QtableSelectors[i] = sof.componentSpecs[i].QtableSelector;
1023 }
1024 }
1025
1026 sourceXOffset += gridX;
1027 sourceWidth -= gridX;
1028 sourceYOffset += gridY;
1029 sourceHeight -= gridY;
1030
1031 int destWidth = (sourceWidth + periodX - 1)/periodX;
1032 int destHeight = (sourceHeight + periodY - 1)/periodY;
1033
1034 // Create an appropriate 1-line databuffer for writing
1035 int lineSize = sourceWidth*numBandsUsed;
1036
1037 DataBufferByte buffer = new DataBufferByte(lineSize);
1038
1039 // Create a raster from that
1040 int [] bandOffs = JPEG.bandOffsets[numBandsUsed-1];
1041
1042 raster = Raster.createInterleavedRaster(buffer,
1043 sourceWidth, 1,
1044 lineSize,
1045 numBandsUsed,
1046 bandOffs,
1047 null);
1048
1049 // Call the writer, who will call back for every scanline
1050
1051 processImageStarted(currentImage);
1052
1053 boolean aborted = false;
1054
1055 if (debug) {
1056 System.out.println("inCsType: " + inCsType);
1057 System.out.println("outCsType: " + outCsType);
1058 }
1059
1060 // Note that getData disables acceleration on buffer, but it is
1061 // just a 1-line intermediate data transfer buffer that does not
1062 // affect the acceleration of the source image.
1063 aborted = writeImage(structPointer,
1064 buffer.getData(),
1065 inCsType, outCsType,
1066 numBandsUsed,
1067 bandSizes,
1068 sourceWidth,
1069 destWidth, destHeight,
1070 periodX, periodY,
1071 qTables,
1072 writeDQT,
1073 DCHuffmanTables,
1074 ACHuffmanTables,
1075 writeDHT,
1076 optimizeHuffman,
1077 (progressiveMode
1078 != ImageWriteParam.MODE_DISABLED),
1079 numScans,
1080 scans,
1081 componentIds,
1082 HsamplingFactors,
1083 VsamplingFactors,
1084 QtableSelectors,
1085 haveMetadata,
1086 restartInterval);
1087
1088 cbLock.lock();
1089 try {
1090 if (aborted) {
1091 processWriteAborted();
1092 } else {
1093 processImageComplete();
1094 }
1095
1096 ios.flush();
1097 } finally {
1098 cbLock.unlock();
1099 }
1100 currentImage++; // After a successful write
1101 }
1102
1103 public void prepareWriteSequence(IIOMetadata streamMetadata)
1104 throws IOException {
1105 setThreadLock();
1106 try {
1107 cbLock.check();
1108
1109 prepareWriteSequenceOnThread(streamMetadata);
1110 } finally {
1111 clearThreadLock();
1112 }
1113 }
1114
1115 private void prepareWriteSequenceOnThread(IIOMetadata streamMetadata)
1116 throws IOException {
1117 if (ios == null) {
1118 throw new IllegalStateException("Output has not been set!");
1119 }
1120
1121 /*
1122 * from jpeg_metadata.html:
1123 * If no stream metadata is supplied to
1124 * <code>ImageWriter.prepareWriteSequence</code>, then no
1125 * tables-only image is written. If stream metadata containing
1126 * no tables is supplied to
1127 * <code>ImageWriter.prepareWriteSequence</code>, then a tables-only
1128 * image containing default visually lossless tables is written.
1129 */
1130 if (streamMetadata != null) {
1131 if (streamMetadata instanceof JPEGMetadata) {
1132 // write a complete tables-only image at the beginning of
1133 // the stream.
1134 JPEGMetadata jmeta = (JPEGMetadata) streamMetadata;
1135 if (jmeta.isStream == false) {
1136 throw new IllegalArgumentException
1137 ("Invalid stream metadata object.");
1138 }
1139 // Check that we are
1140 // at the beginning of the stream, or can go there, and haven't
1141 // written out the metadata already.
1142 if (currentImage != 0) {
1143 throw new IIOException
1144 ("JPEG Stream metadata must precede all images");
1145 }
1146 if (sequencePrepared == true) {
1147 throw new IIOException("Stream metadata already written!");
1148 }
1149
1150 // Set the tables
1151 // If the metadata has no tables, use default tables.
1152 streamQTables = collectQTablesFromMetadata(jmeta);
1153 if (debug) {
1154 System.out.println("after collecting from stream metadata, "
1155 + "streamQTables.length is "
1156 + streamQTables.length);
1157 }
1158 if (streamQTables == null) {
1159 streamQTables = JPEG.getDefaultQTables();
1160 }
1161 streamDCHuffmanTables =
1162 collectHTablesFromMetadata(jmeta, true);
1163 if (streamDCHuffmanTables == null) {
1164 streamDCHuffmanTables = JPEG.getDefaultHuffmanTables(true);
1165 }
1166 streamACHuffmanTables =
1167 collectHTablesFromMetadata(jmeta, false);
1168 if (streamACHuffmanTables == null) {
1169 streamACHuffmanTables = JPEG.getDefaultHuffmanTables(false);
1170 }
1171
1172 // Now write them out
1173 writeTables(structPointer,
1174 streamQTables,
1175 streamDCHuffmanTables,
1176 streamACHuffmanTables);
1177 } else {
1178 throw new IIOException("Stream metadata must be JPEG metadata");
1179 }
1180 }
1181 sequencePrepared = true;
1182 }
1183
1184 public void writeToSequence(IIOImage image, ImageWriteParam param)
1185 throws IOException {
1186 setThreadLock();
1187 try {
1188 cbLock.check();
1189
1190 if (sequencePrepared == false) {
1191 throw new IllegalStateException("sequencePrepared not called!");
1192 }
1193 // In the case of JPEG this does nothing different from write
1194 write(null, image, param);
1195 } finally {
1196 clearThreadLock();
1197 }
1198 }
1199
1200 public void endWriteSequence() throws IOException {
1201 setThreadLock();
1202 try {
1203 cbLock.check();
1204
1205 if (sequencePrepared == false) {
1206 throw new IllegalStateException("sequencePrepared not called!");
1207 }
1208 sequencePrepared = false;
1209 } finally {
1210 clearThreadLock();
1211 }
1212 }
1213
1214 public synchronized void abort() {
1215 setThreadLock();
1216 try {
1217 /**
1218 * NB: we do not check the call back lock here, we allow to abort
1219 * the reader any time.
1220 */
1221 super.abort();
1222 abortWrite(structPointer);
1223 } finally {
1224 clearThreadLock();
1225 }
1226 }
1227
1228 private void resetInternalState() {
1229 // reset C structures
1230 resetWriter(structPointer);
1231
1232 // reset local Java structures
1233 srcRas = null;
1234 raster = null;
1235 convertTosRGB = false;
1236 currentImage = 0;
1237 numScans = 0;
1238 metadata = null;
1239 }
1240
1241 public void reset() {
1242 setThreadLock();
1243 try {
1244 cbLock.check();
1245
1246 super.reset();
1247 } finally {
1248 clearThreadLock();
1249 }
1250 }
1251
1252 public void dispose() {
1253 setThreadLock();
1254 try {
1255 cbLock.check();
1256
1257 if (structPointer != 0) {
1258 disposerRecord.dispose();
1259 structPointer = 0;
1260 }
1261 } finally {
1262 clearThreadLock();
1263 }
1264 }
1265
1266 ////////// End of public API
1267
1268 ///////// Package-access API
1269
1270 /**
1271 * Called by the native code or other classes to signal a warning.
1272 * The code is used to lookup a localized message to be used when
1273 * sending warnings to listeners.
1274 */
1275 void warningOccurred(int code) {
1276 cbLock.lock();
1277 try {
1278 if ((code < 0) || (code > MAX_WARNING)){
1279 throw new InternalError("Invalid warning index");
1280 }
1281 processWarningOccurred
1282 (currentImage,
1283 "com.sun.imageio.plugins.jpeg.JPEGImageWriterResources",
1284 Integer.toString(code));
1285 } finally {
1286 cbLock.unlock();
1287 }
1288 }
1289
1290 /**
1291 * The library has it's own error facility that emits warning messages.
1292 * This routine is called by the native code when it has already
1293 * formatted a string for output.
1294 * XXX For truly complete localization of all warning messages,
1295 * the sun_jpeg_output_message routine in the native code should
1296 * send only the codes and parameters to a method here in Java,
1297 * which will then format and send the warnings, using localized
1298 * strings. This method will have to deal with all the parameters
1299 * and formats (%u with possibly large numbers, %02d, %02x, etc.)
1300 * that actually occur in the JPEG library. For now, this prevents
1301 * library warnings from being printed to stderr.
1302 */
1303 void warningWithMessage(String msg) {
1304 cbLock.lock();
1305 try {
1306 processWarningOccurred(currentImage, msg);
1307 } finally {
1308 cbLock.unlock();
1309 }
1310 }
1311
1312 void thumbnailStarted(int thumbnailIndex) {
1313 cbLock.lock();
1314 try {
1315 processThumbnailStarted(currentImage, thumbnailIndex);
1316 } finally {
1317 cbLock.unlock();
1318 }
1319 }
1320
1321 // Provide access to protected superclass method
1322 void thumbnailProgress(float percentageDone) {
1323 cbLock.lock();
1324 try {
1325 processThumbnailProgress(percentageDone);
1326 } finally {
1327 cbLock.unlock();
1328 }
1329 }
1330
1331 // Provide access to protected superclass method
1332 void thumbnailComplete() {
1333 cbLock.lock();
1334 try {
1335 processThumbnailComplete();
1336 } finally {
1337 cbLock.unlock();
1338 }
1339 }
1340
1341 ///////// End of Package-access API
1342
1343 ///////// Private methods
1344
1345 ///////// Metadata handling
1346
1347 private void checkSOFBands(SOFMarkerSegment sof, int numBandsUsed)
1348 throws IIOException {
1349 // Does the metadata frame header, if any, match numBandsUsed?
1350 if (sof != null) {
1351 if (sof.componentSpecs.length != numBandsUsed) {
1352 throw new IIOException
1353 ("Metadata components != number of destination bands");
1354 }
1355 }
1356 }
1357
1358 private void checkJFIF(JFIFMarkerSegment jfif,
1359 ImageTypeSpecifier type,
1360 boolean input) {
1361 if (jfif != null) {
1362 if (!JPEG.isJFIFcompliant(type, input)) {
1363 ignoreJFIF = true; // type overrides metadata
1364 warningOccurred(input
1365 ? WARNING_IMAGE_METADATA_JFIF_MISMATCH
1366 : WARNING_DEST_METADATA_JFIF_MISMATCH);
1367 }
1368 }
1369 }
1370
1371 private void checkAdobe(AdobeMarkerSegment adobe,
1372 ImageTypeSpecifier type,
1373 boolean input) {
1374 if (adobe != null) {
1375 int rightTransform = JPEG.transformForType(type, input);
1376 if (adobe.transform != rightTransform) {
1377 warningOccurred(input
1378 ? WARNING_IMAGE_METADATA_ADOBE_MISMATCH
1379 : WARNING_DEST_METADATA_ADOBE_MISMATCH);
1380 if (rightTransform == JPEG.ADOBE_IMPOSSIBLE) {
1381 ignoreAdobe = true;
1382 } else {
1383 newAdobeTransform = rightTransform;
1384 }
1385 }
1386 }
1387 }
1388
1389 /**
1390 * Collect all the scan info from the given metadata, and
1391 * organize it into the scan info array required by the
1392 * IJG libray. It is much simpler to parse out this
1393 * data in Java and then just copy the data in C.
1394 */
1395 private int [] collectScans(JPEGMetadata metadata,
1396 SOFMarkerSegment sof) {
1397 List<SOSMarkerSegment> segments = new ArrayList<>();
1398 int SCAN_SIZE = 9;
1399 int MAX_COMPS_PER_SCAN = 4;
1400 for (Iterator<MarkerSegment> iter = metadata.markerSequence.iterator();
1401 iter.hasNext();) {
1402 MarkerSegment seg = iter.next();
1403 if (seg instanceof SOSMarkerSegment) {
1404 segments.add((SOSMarkerSegment) seg);
1405 }
1406 }
1407 int [] retval = null;
1408 numScans = 0;
1409 if (!segments.isEmpty()) {
1410 numScans = segments.size();
1411 retval = new int [numScans*SCAN_SIZE];
1412 int index = 0;
1413 for (int i = 0; i < numScans; i++) {
1414 SOSMarkerSegment sos = segments.get(i);
1415 retval[index++] = sos.componentSpecs.length; // num comps
1416 for (int j = 0; j < MAX_COMPS_PER_SCAN; j++) {
1417 if (j < sos.componentSpecs.length) {
1418 int compSel = sos.componentSpecs[j].componentSelector;
1419 for (int k = 0; k < sof.componentSpecs.length; k++) {
1420 if (compSel == sof.componentSpecs[k].componentId) {
1421 retval[index++] = k;
1422 break; // out of for over sof comps
1423 }
1424 }
1425 } else {
1426 retval[index++] = 0;
1427 }
1428 }
1429 retval[index++] = sos.startSpectralSelection;
1430 retval[index++] = sos.endSpectralSelection;
1431 retval[index++] = sos.approxHigh;
1432 retval[index++] = sos.approxLow;
1433 }
1434 }
1435 return retval;
1436 }
1437
1438 /**
1439 * Finds all DQT marker segments and returns all the q
1440 * tables as a single array of JPEGQTables.
1441 */
1442 private JPEGQTable [] collectQTablesFromMetadata
1443 (JPEGMetadata metadata) {
1444 ArrayList<DQTMarkerSegment.Qtable> tables = new ArrayList<>();
1445 Iterator<MarkerSegment> iter = metadata.markerSequence.iterator();
1446 while (iter.hasNext()) {
1447 MarkerSegment seg = iter.next();
1448 if (seg instanceof DQTMarkerSegment) {
1449 DQTMarkerSegment dqt =
1450 (DQTMarkerSegment) seg;
1451 tables.addAll(dqt.tables);
1452 }
1453 }
1454 JPEGQTable [] retval = null;
1455 if (tables.size() != 0) {
1456 retval = new JPEGQTable[tables.size()];
1457 for (int i = 0; i < retval.length; i++) {
1458 retval[i] =
1459 new JPEGQTable(tables.get(i).data);
1460 }
1461 }
1462 return retval;
1463 }
1464
1465 /**
1466 * Finds all DHT marker segments and returns all the q
1467 * tables as a single array of JPEGQTables. The metadata
1468 * must not be for a progressive image, or an exception
1469 * will be thrown when two Huffman tables with the same
1470 * table id are encountered.
1471 */
1472 private JPEGHuffmanTable[] collectHTablesFromMetadata
1473 (JPEGMetadata metadata, boolean wantDC) throws IIOException {
1474 ArrayList<DHTMarkerSegment.Htable> tables = new ArrayList<>();
1475 Iterator<MarkerSegment> iter = metadata.markerSequence.iterator();
1476 while (iter.hasNext()) {
1477 MarkerSegment seg = iter.next();
1478 if (seg instanceof DHTMarkerSegment) {
1479 DHTMarkerSegment dht = (DHTMarkerSegment) seg;
1480 for (int i = 0; i < dht.tables.size(); i++) {
1481 DHTMarkerSegment.Htable htable = dht.tables.get(i);
1482 if (htable.tableClass == (wantDC ? 0 : 1)) {
1483 tables.add(htable);
1484 }
1485 }
1486 }
1487 }
1488 JPEGHuffmanTable [] retval = null;
1489 if (tables.size() != 0) {
1490 DHTMarkerSegment.Htable [] htables =
1491 new DHTMarkerSegment.Htable[tables.size()];
1492 tables.toArray(htables);
1493 retval = new JPEGHuffmanTable[tables.size()];
1494 for (int i = 0; i < retval.length; i++) {
1495 retval[i] = null;
1496 for (int j = 0; j < tables.size(); j++) {
1497 if (htables[j].tableID == i) {
1498 if (retval[i] != null) {
1499 throw new IIOException("Metadata has duplicate Htables!");
1500 }
1501 retval[i] = new JPEGHuffmanTable(htables[j].numCodes,
1502 htables[j].values);
1503 }
1504 }
1505 }
1506 }
1507
1508 return retval;
1509 }
1510
1511 /////////// End of metadata handling
1512
1513 ////////////// ColorSpace conversion
1514
1515 private int getSrcCSType(ImageTypeSpecifier type) {
1516 return getSrcCSType(type.getColorModel());
1517 }
1518
1519 private int getSrcCSType(RenderedImage rimage) {
1520 return getSrcCSType(rimage.getColorModel());
1521 }
1522
1523 private int getSrcCSType(ColorModel cm) {
1524 int retval = JPEG.JCS_UNKNOWN;
1525 if (cm != null) {
1526 boolean alpha = cm.hasAlpha();
1527 ColorSpace cs = cm.getColorSpace();
1528 switch (cs.getType()) {
1529 case ColorSpace.TYPE_GRAY:
1530 retval = JPEG.JCS_GRAYSCALE;
1531 break;
1532 case ColorSpace.TYPE_RGB:
1533 if (alpha) {
1534 retval = JPEG.JCS_RGBA;
1535 } else {
1536 retval = JPEG.JCS_RGB;
1537 }
1538 break;
1539 case ColorSpace.TYPE_YCbCr:
1540 if (alpha) {
1541 retval = JPEG.JCS_YCbCrA;
1542 } else {
1543 retval = JPEG.JCS_YCbCr;
1544 }
1545 break;
1546 case ColorSpace.TYPE_3CLR:
1547 if (cs == JPEG.JCS.getYCC()) {
1548 if (alpha) {
1549 retval = JPEG.JCS_YCCA;
1550 } else {
1551 retval = JPEG.JCS_YCC;
1552 }
1553 }
1554 break;
1555 case ColorSpace.TYPE_CMYK:
1556 retval = JPEG.JCS_CMYK;
1557 break;
1558 }
1559 }
1560 return retval;
1561 }
1562
1563 private int getDestCSType(ImageTypeSpecifier destType) {
1564 ColorModel cm = destType.getColorModel();
1565 boolean alpha = cm.hasAlpha();
1566 ColorSpace cs = cm.getColorSpace();
1567 int retval = JPEG.JCS_UNKNOWN;
1568 switch (cs.getType()) {
1569 case ColorSpace.TYPE_GRAY:
1570 retval = JPEG.JCS_GRAYSCALE;
1571 break;
1572 case ColorSpace.TYPE_RGB:
1573 if (alpha) {
1574 retval = JPEG.JCS_RGBA;
1575 } else {
1576 retval = JPEG.JCS_RGB;
1577 }
1578 break;
1579 case ColorSpace.TYPE_YCbCr:
1580 if (alpha) {
1581 retval = JPEG.JCS_YCbCrA;
1582 } else {
1583 retval = JPEG.JCS_YCbCr;
1584 }
1585 break;
1586 case ColorSpace.TYPE_3CLR:
1587 if (cs == JPEG.JCS.getYCC()) {
1588 if (alpha) {
1589 retval = JPEG.JCS_YCCA;
1590 } else {
1591 retval = JPEG.JCS_YCC;
1592 }
1593 }
1594 break;
1595 case ColorSpace.TYPE_CMYK:
1596 retval = JPEG.JCS_CMYK;
1597 break;
1598 }
1599 return retval;
1600 }
1601
1602 private int getDefaultDestCSType(ImageTypeSpecifier type) {
1603 return getDefaultDestCSType(type.getColorModel());
1604 }
1605
1606 private int getDefaultDestCSType(RenderedImage rimage) {
1607 return getDefaultDestCSType(rimage.getColorModel());
1608 }
1609
1610 private int getDefaultDestCSType(ColorModel cm) {
1611 int retval = JPEG.JCS_UNKNOWN;
1612 if (cm != null) {
1613 boolean alpha = cm.hasAlpha();
1614 ColorSpace cs = cm.getColorSpace();
1615 switch (cs.getType()) {
1616 case ColorSpace.TYPE_GRAY:
1617 retval = JPEG.JCS_GRAYSCALE;
1618 break;
1619 case ColorSpace.TYPE_RGB:
1620 if (alpha) {
1621 retval = JPEG.JCS_YCbCrA;
1622 } else {
1623 retval = JPEG.JCS_YCbCr;
1624 }
1625 break;
1626 case ColorSpace.TYPE_YCbCr:
1627 if (alpha) {
1628 retval = JPEG.JCS_YCbCrA;
1629 } else {
1630 retval = JPEG.JCS_YCbCr;
1631 }
1632 break;
1633 case ColorSpace.TYPE_3CLR:
1634 if (cs == JPEG.JCS.getYCC()) {
1635 if (alpha) {
1636 retval = JPEG.JCS_YCCA;
1637 } else {
1638 retval = JPEG.JCS_YCC;
1639 }
1640 }
1641 break;
1642 case ColorSpace.TYPE_CMYK:
1643 retval = JPEG.JCS_YCCK;
1644 break;
1645 }
1646 }
1647 return retval;
1648 }
1649
1650 private boolean isSubsampled(SOFMarkerSegment.ComponentSpec [] specs) {
1651 int hsamp0 = specs[0].HsamplingFactor;
1652 int vsamp0 = specs[0].VsamplingFactor;
1653 for (int i = 1; i < specs.length; i++) {
1654 if ((specs[i].HsamplingFactor != hsamp0) ||
1655 (specs[i].VsamplingFactor != vsamp0))
1656 return true;
1657 }
1658 return false;
1659 }
1660
1661 ////////////// End of ColorSpace conversion
1662
1663 ////////////// Native methods and callbacks
1664
1665 /** Sets up static native structures. */
1666 private static native void initWriterIDs(Class<?> qTableClass,
1667 Class<?> huffClass);
1668
1669 /** Sets up per-writer native structure and returns a pointer to it. */
1670 private native long initJPEGImageWriter();
1671
1672 /** Sets up native structures for output stream */
1673 private native void setDest(long structPointer);
1674
1675 /**
1676 * Returns <code>true</code> if the write was aborted.
1677 */
1678 private native boolean writeImage(long structPointer,
1679 byte [] data,
1680 int inCsType, int outCsType,
1681 int numBands,
1682 int [] bandSizes,
1683 int srcWidth,
1684 int destWidth, int destHeight,
1685 int stepX, int stepY,
1686 JPEGQTable [] qtables,
1687 boolean writeDQT,
1688 JPEGHuffmanTable[] DCHuffmanTables,
1689 JPEGHuffmanTable[] ACHuffmanTables,
1690 boolean writeDHT,
1691 boolean optimizeHuffman,
1692 boolean progressive,
1693 int numScans,
1694 int [] scans,
1695 int [] componentIds,
1696 int [] HsamplingFactors,
1697 int [] VsamplingFactors,
1698 int [] QtableSelectors,
1699 boolean haveMetadata,
1700 int restartInterval);
1701
1702
1703 /**
1704 * Writes the metadata out when called by the native code,
1705 * which will have already written the header to the stream
1706 * and established the library state. This is simpler than
1707 * breaking the write call in two.
1708 */
1709 private void writeMetadata() throws IOException {
1710 if (metadata == null) {
1711 if (writeDefaultJFIF) {
1712 JFIFMarkerSegment.writeDefaultJFIF(ios,
1713 thumbnails,
1714 iccProfile,
1715 this);
1716 }
1717 if (writeAdobe) {
1718 AdobeMarkerSegment.writeAdobeSegment(ios, newAdobeTransform);
1719 }
1720 } else {
1721 metadata.writeToStream(ios,
1722 ignoreJFIF,
1723 forceJFIF,
1724 thumbnails,
1725 iccProfile,
1726 ignoreAdobe,
1727 newAdobeTransform,
1728 this);
1729 }
1730 }
1731
1732 /**
1733 * Write out a tables-only image to the stream.
1734 */
1735 private native void writeTables(long structPointer,
1736 JPEGQTable [] qtables,
1737 JPEGHuffmanTable[] DCHuffmanTables,
1738 JPEGHuffmanTable[] ACHuffmanTables);
1739
1740 /**
1741 * Put the scanline y of the source ROI view Raster into the
1742 * 1-line Raster for writing. This handles ROI and band
1743 * rearrangements, and expands indexed images. Subsampling is
1744 * done in the native code.
1745 * This is called by the native code.
1746 */
1747 private void grabPixels(int y) {
1748
1749 Raster sourceLine = null;
1750 if (indexed) {
1751 sourceLine = srcRas.createChild(sourceXOffset,
1752 sourceYOffset+y,
1753 sourceWidth, 1,
1754 0, 0,
1755 new int [] {0});
1756 // If the image has BITMASK transparency, we need to make sure
1757 // it gets converted to 32-bit ARGB, because the JPEG encoder
1758 // relies upon the full 8-bit alpha channel.
1759 boolean forceARGB =
1760 (indexCM.getTransparency() != Transparency.OPAQUE);
1761 BufferedImage temp = indexCM.convertToIntDiscrete(sourceLine,
1762 forceARGB);
1763 sourceLine = temp.getRaster();
1764 } else {
1765 sourceLine = srcRas.createChild(sourceXOffset,
1766 sourceYOffset+y,
1767 sourceWidth, 1,
1768 0, 0,
1769 srcBands);
1770 }
1771 if (convertTosRGB) {
1772 if (debug) {
1773 System.out.println("Converting to sRGB");
1774 }
1775 // The first time through, converted is null, so
1776 // a new raster is allocated. It is then reused
1777 // on subsequent lines.
1778 converted = convertOp.filter(sourceLine, converted);
1779 sourceLine = converted;
1780 }
1781 if (isAlphaPremultiplied) {
1782 WritableRaster wr = sourceLine.createCompatibleWritableRaster();
1783 int[] data = null;
1784 data = sourceLine.getPixels(sourceLine.getMinX(), sourceLine.getMinY(),
1785 sourceLine.getWidth(), sourceLine.getHeight(),
1786 data);
1787 wr.setPixels(sourceLine.getMinX(), sourceLine.getMinY(),
1788 sourceLine.getWidth(), sourceLine.getHeight(),
1789 data);
1790 srcCM.coerceData(wr, false);
1791 sourceLine = wr.createChild(wr.getMinX(), wr.getMinY(),
1792 wr.getWidth(), wr.getHeight(),
1793 0, 0,
1794 srcBands);
1795 }
1796 raster.setRect(sourceLine);
1797 if ((y > 7) && (y%8 == 0)) { // Every 8 scanlines
1798 cbLock.lock();
1799 try {
1800 processImageProgress((float) y / (float) sourceHeight * 100.0F);
1801 } finally {
1802 cbLock.unlock();
1803 }
1804 }
1805 }
1806
1807 /** Aborts the current write in the native code */
1808 private native void abortWrite(long structPointer);
1809
1810 /** Resets native structures */
1811 private native void resetWriter(long structPointer);
1812
1813 /** Releases native structures */
1814 private static native void disposeWriter(long structPointer);
1815
1816 private static class JPEGWriterDisposerRecord implements DisposerRecord {
1817 private long pData;
1818
1819 public JPEGWriterDisposerRecord(long pData) {
1820 this.pData = pData;
1821 }
1822
1823 public synchronized void dispose() {
1824 if (pData != 0) {
1825 disposeWriter(pData);
1826 pData = 0;
1827 }
1828 }
1829 }
1830
1831 /**
1832 * This method is called from native code in order to write encoder
1833 * output to the destination.
1834 *
1835 * We block any attempt to change the writer state during this
1836 * method, in order to prevent a corruption of the native encoder
1837 * state.
1838 */
1839 private void writeOutputData(byte[] data, int offset, int len)
1840 throws IOException
1841 {
1842 cbLock.lock();
1843 try {
1844 ios.write(data, offset, len);
1845 } finally {
1846 cbLock.unlock();
1847 }
1848 }
1849
1850 private Thread theThread = null;
1851 private int theLockCount = 0;
1852
1853 private synchronized void setThreadLock() {
1854 Thread currThread = Thread.currentThread();
1855 if (theThread != null) {
1856 if (theThread != currThread) {
1857 // it looks like that this reader instance is used
1858 // by multiple threads.
1859 throw new IllegalStateException("Attempt to use instance of " +
1860 this + " locked on thread " +
1861 theThread + " from thread " +
1862 currThread);
1863 } else {
1864 theLockCount ++;
1865 }
1866 } else {
1867 theThread = currThread;
1868 theLockCount = 1;
1869 }
1870 }
1871
1872 private synchronized void clearThreadLock() {
1873 Thread currThread = Thread.currentThread();
1874 if (theThread == null || theThread != currThread) {
1875 throw new IllegalStateException("Attempt to clear thread lock form wrong thread. " +
1876 "Locked thread: " + theThread +
1877 "; current thread: " + currThread);
1878 }
1879 theLockCount --;
1880 if (theLockCount == 0) {
1881 theThread = null;
1882 }
1883 }
1884
1885 private CallBackLock cbLock = new CallBackLock();
1886
1887 private static class CallBackLock {
1888
1889 private State lockState;
1890
1891 CallBackLock() {
1892 lockState = State.Unlocked;
1893 }
1894
1895 void check() {
1896 if (lockState != State.Unlocked) {
1897 throw new IllegalStateException("Access to the writer is not allowed");
1898 }
1899 }
1900
1901 private void lock() {
1902 lockState = State.Locked;
1903 }
1904
1905 private void unlock() {
1906 lockState = State.Unlocked;
1907 }
1908
1909 private static enum State {
1910 Unlocked,
1911 Locked
1912 }
1913 }
1914 }