1 /*
2 * Copyright (c) 2000, 2016, 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 /*
27 * This file contains the code to link the Java Image I/O JPEG plug-in
28 * to the IJG library used to read and write JPEG files. Much of it has
29 * been copied, updated, and annotated from the jpegdecoder.c AWT JPEG
30 * decoder. Where that code was unclear, the present author has either
31 * rewritten the relevant section or commented it for the sake of future
32 * maintainers.
33 *
34 * In particular, the way the AWT code handled progressive JPEGs seems
35 * to me to be only accidentally correct and somewhat inefficient. The
36 * scheme used here represents the way I think it should work. (REV 11/00)
37 */
38
39 #include <stdlib.h>
40 #include <setjmp.h>
41 #include <assert.h>
42 #include <string.h>
43 #include <limits.h>
44
45 /* java native interface headers */
46 #include "jni.h"
47 #include "jni_util.h"
48
49 #include "com_sun_imageio_plugins_jpeg_JPEGImageReader.h"
50 #include "com_sun_imageio_plugins_jpeg_JPEGImageWriter.h"
51
52 /* headers from the JPEG library */
53 #include <jpeglib.h>
54 #include <jerror.h>
55
56 #undef MAX
57 #define MAX(a,b) ((a) > (b) ? (a) : (b))
58
59 #ifdef __APPLE__
60 /* use setjmp/longjmp versions that do not save/restore the signal mask */
61 #define setjmp _setjmp
62 #define longjmp _longjmp
63 #endif
64
65 /* Cached Java method ids */
66 static jmethodID JPEGImageReader_readInputDataID;
67 static jmethodID JPEGImageReader_skipInputBytesID;
68 static jmethodID JPEGImageReader_warningOccurredID;
69 static jmethodID JPEGImageReader_warningWithMessageID;
70 static jmethodID JPEGImageReader_setImageDataID;
71 static jmethodID JPEGImageReader_acceptPixelsID;
72 static jmethodID JPEGImageReader_pushBackID;
73 static jmethodID JPEGImageReader_passStartedID;
74 static jmethodID JPEGImageReader_passCompleteID;
75 static jmethodID JPEGImageWriter_writeOutputDataID;
76 static jmethodID JPEGImageWriter_warningOccurredID;
77 static jmethodID JPEGImageWriter_warningWithMessageID;
78 static jmethodID JPEGImageWriter_writeMetadataID;
79 static jmethodID JPEGImageWriter_grabPixelsID;
80 static jfieldID JPEGQTable_tableID;
81 static jfieldID JPEGHuffmanTable_lengthsID;
82 static jfieldID JPEGHuffmanTable_valuesID;
83
84 /*
85 * Defined in jpegdecoder.c. Copy code from there if and
86 * when that disappears. */
87 extern JavaVM *jvm;
88
89 /*
90 * The following sets of defines must match the warning messages in the
91 * Java code.
92 */
93
94 /* Reader warnings */
95 #define READ_NO_EOI 0
96
97 /* Writer warnings */
98
99 /* Return codes for various ops */
100 #define OK 1
101 #define NOT_OK 0
102
103 /*
104 * First we define two objects, one for the stream and buffer and one
105 * for pixels. Both contain references to Java objects and pointers to
106 * pinned arrays. These objects can be used for either input or
107 * output. Pixels can be accessed as either INT32s or bytes.
108 * Every I/O operation will have one of each these objects, one for
109 * the stream and the other to hold pixels, regardless of the I/O direction.
110 */
111
112 /******************** StreamBuffer definition ************************/
113
114 typedef struct streamBufferStruct {
115 jweak ioRef; // weak reference to a provider of I/O routines
116 jbyteArray hstreamBuffer; // Handle to a Java buffer for the stream
117 JOCTET *buf; // Pinned buffer pointer */
118 size_t bufferOffset; // holds offset between unpin and the next pin
119 size_t bufferLength; // Allocated, nut just used
120 int suspendable; // Set to true to suspend input
121 long remaining_skip; // Used only on input
122 } streamBuffer, *streamBufferPtr;
123
124 /*
125 * This buffer size was set to 64K in the old classes, 4K by default in the
126 * IJG library, with the comment "an efficiently freadable size", and 1K
127 * in AWT.
128 * Unlike in the other Java designs, these objects will persist, so 64K
129 * seems too big and 1K seems too small. If 4K was good enough for the
130 * IJG folks, it's good enough for me.
131 */
132 #define STREAMBUF_SIZE 4096
133
134 #define GET_IO_REF(io_name) \
135 do { \
136 if ((*env)->IsSameObject(env, sb->ioRef, NULL) || \
137 ((io_name) = (*env)->NewLocalRef(env, sb->ioRef)) == NULL) \
138 { \
139 cinfo->err->error_exit((j_common_ptr) cinfo); \
140 } \
141 } while (0) \
142
143 /*
144 * Used to signal that no data need be restored from an unpin to a pin.
145 * I.e. the buffer is empty.
146 */
147 #define NO_DATA ((size_t)-1)
148
149 // Forward reference
150 static void resetStreamBuffer(JNIEnv *env, streamBufferPtr sb);
151
152 /*
153 * Initialize a freshly allocated StreamBuffer object. The stream is left
154 * null, as it will be set from Java by setSource, but the buffer object
155 * is created and a global reference kept. Returns OK on success, NOT_OK
156 * if allocating the buffer or getting a global reference for it failed.
157 */
158 static int initStreamBuffer(JNIEnv *env, streamBufferPtr sb) {
159 /* Initialize a new buffer */
160 jbyteArray hInputBuffer = (*env)->NewByteArray(env, STREAMBUF_SIZE);
161 if (hInputBuffer == NULL) {
162 (*env)->ExceptionClear(env);
163 JNU_ThrowByName( env,
164 "java/lang/OutOfMemoryError",
165 "Initializing Reader");
166 return NOT_OK;
167 }
168 sb->bufferLength = (*env)->GetArrayLength(env, hInputBuffer);
169 sb->hstreamBuffer = (*env)->NewGlobalRef(env, hInputBuffer);
170 if (sb->hstreamBuffer == NULL) {
171 JNU_ThrowByName( env,
172 "java/lang/OutOfMemoryError",
173 "Initializing Reader");
174 return NOT_OK;
175 }
176
177
178 sb->ioRef = NULL;
179
180 sb->buf = NULL;
181
182 resetStreamBuffer(env, sb);
183
184 return OK;
185 }
186
187 /*
188 * Free all resources associated with this streamBuffer. This must
189 * be called to dispose the object to avoid leaking global references, as
190 * resetStreamBuffer does not release the buffer reference.
191 */
192 static void destroyStreamBuffer(JNIEnv *env, streamBufferPtr sb) {
193 resetStreamBuffer(env, sb);
194 if (sb->hstreamBuffer != NULL) {
195 (*env)->DeleteGlobalRef(env, sb->hstreamBuffer);
196 }
197 }
198
199 // Forward reference
200 static void unpinStreamBuffer(JNIEnv *env,
201 streamBufferPtr sb,
202 const JOCTET *next_byte);
203 /*
204 * Resets the state of a streamBuffer object that has been in use.
205 * The global reference to the stream is released, but the reference
206 * to the buffer is retained. The buffer is unpinned if it was pinned.
207 * All other state is reset.
208 */
209 static void resetStreamBuffer(JNIEnv *env, streamBufferPtr sb) {
210 if (sb->ioRef != NULL) {
211 (*env)->DeleteWeakGlobalRef(env, sb->ioRef);
212 sb->ioRef = NULL;
213 }
214 unpinStreamBuffer(env, sb, NULL);
215 sb->bufferOffset = NO_DATA;
216 sb->suspendable = FALSE;
217 sb->remaining_skip = 0;
218 }
219
220 /*
221 * Pins the data buffer associated with this stream. Returns OK on
222 * success, NOT_OK on failure, as GetPrimitiveArrayCritical may fail.
223 */
224 static int pinStreamBuffer(JNIEnv *env,
225 streamBufferPtr sb,
226 const JOCTET **next_byte) {
227 if (sb->hstreamBuffer != NULL) {
228 assert(sb->buf == NULL);
229 sb->buf =
230 (JOCTET *)(*env)->GetPrimitiveArrayCritical(env,
231 sb->hstreamBuffer,
232 NULL);
233 if (sb->buf == NULL) {
234 return NOT_OK;
235 }
236 if (sb->bufferOffset != NO_DATA) {
237 *next_byte = sb->buf + sb->bufferOffset;
238 }
239 }
240 return OK;
241 }
242
243 /*
244 * Unpins the data buffer associated with this stream.
245 */
246 static void unpinStreamBuffer(JNIEnv *env,
247 streamBufferPtr sb,
248 const JOCTET *next_byte) {
249 if (sb->buf != NULL) {
250 assert(sb->hstreamBuffer != NULL);
251 if (next_byte == NULL) {
252 sb->bufferOffset = NO_DATA;
253 } else {
254 sb->bufferOffset = next_byte - sb->buf;
255 }
256 (*env)->ReleasePrimitiveArrayCritical(env,
257 sb->hstreamBuffer,
258 sb->buf,
259 0);
260 sb->buf = NULL;
261 }
262 }
263
264 /*
265 * Clear out the streamBuffer. This just invalidates the data in the buffer.
266 */
267 static void clearStreamBuffer(streamBufferPtr sb) {
268 sb->bufferOffset = NO_DATA;
269 }
270
271 /*************************** end StreamBuffer definition *************/
272
273 /*************************** Pixel Buffer definition ******************/
274
275 typedef struct pixelBufferStruct {
276 jobject hpixelObject; // Usually a DataBuffer bank as a byte array
277 unsigned int byteBufferLength;
278 union pixptr {
279 INT32 *ip; // Pinned buffer pointer, as 32-bit ints
280 unsigned char *bp; // Pinned buffer pointer, as bytes
281 } buf;
282 } pixelBuffer, *pixelBufferPtr;
283
284 /*
285 * Initialize a freshly allocated PixelBuffer. All fields are simply
286 * set to NULL, as we have no idea what size buffer we will need.
287 */
288 static void initPixelBuffer(pixelBufferPtr pb) {
289 pb->hpixelObject = NULL;
290 pb->byteBufferLength = 0;
291 pb->buf.ip = NULL;
292 }
293
294 /*
295 * Set the pixelBuffer to use the given buffer, acquiring a new global
296 * reference for it. Returns OK on success, NOT_OK on failure.
297 */
298 static int setPixelBuffer(JNIEnv *env, pixelBufferPtr pb, jobject obj) {
299 pb->hpixelObject = (*env)->NewGlobalRef(env, obj);
300 if (pb->hpixelObject == NULL) {
301 JNU_ThrowByName( env,
302 "java/lang/OutOfMemoryError",
303 "Setting Pixel Buffer");
304 return NOT_OK;
305 }
306 pb->byteBufferLength = (*env)->GetArrayLength(env, pb->hpixelObject);
307 return OK;
308 }
309
310 // Forward reference
311 static void unpinPixelBuffer(JNIEnv *env, pixelBufferPtr pb);
312
313 /*
314 * Resets a pixel buffer to its initial state. Unpins any pixel buffer,
315 * releases the global reference, and resets fields to NULL. Use this
316 * method to dispose the object as well (there is no destroyPixelBuffer).
317 */
318 static void resetPixelBuffer(JNIEnv *env, pixelBufferPtr pb) {
319 if (pb->hpixelObject != NULL) {
320 unpinPixelBuffer(env, pb);
321 (*env)->DeleteGlobalRef(env, pb->hpixelObject);
322 pb->hpixelObject = NULL;
323 pb->byteBufferLength = 0;
324 }
325 }
326
327 /*
328 * Pins the data buffer. Returns OK on success, NOT_OK on failure.
329 */
330 static int pinPixelBuffer(JNIEnv *env, pixelBufferPtr pb) {
331 if (pb->hpixelObject != NULL) {
332 assert(pb->buf.ip == NULL);
333 pb->buf.bp = (unsigned char *)(*env)->GetPrimitiveArrayCritical
334 (env, pb->hpixelObject, NULL);
335 if (pb->buf.bp == NULL) {
336 return NOT_OK;
337 }
338 }
339 return OK;
340 }
341
342 /*
343 * Unpins the data buffer.
344 */
345 static void unpinPixelBuffer(JNIEnv *env, pixelBufferPtr pb) {
346
347 if (pb->buf.ip != NULL) {
348 assert(pb->hpixelObject != NULL);
349 (*env)->ReleasePrimitiveArrayCritical(env,
350 pb->hpixelObject,
351 pb->buf.ip,
352 0);
353 pb->buf.ip = NULL;
354 }
355 }
356
357 /********************* end PixelBuffer definition *******************/
358
359 /********************* ImageIOData definition ***********************/
360
361 #define MAX_BANDS 4
362 #define JPEG_BAND_SIZE 8
363 #define NUM_BAND_VALUES (1<<JPEG_BAND_SIZE)
364 #define MAX_JPEG_BAND_VALUE (NUM_BAND_VALUES-1)
365 #define HALF_MAX_JPEG_BAND_VALUE (MAX_JPEG_BAND_VALUE>>1)
366
367 /* The number of possible incoming values to be scaled. */
368 #define NUM_INPUT_VALUES (1 << 16)
369
370 /*
371 * The principal imageioData object, opaque to I/O direction.
372 * Each JPEGImageReader will have associated with it a
373 * jpeg_decompress_struct, and similarly each JPEGImageWriter will
374 * have associated with it a jpeg_compress_struct. In order to
375 * ensure that these associations persist from one native call to
376 * the next, and to provide a central locus of imageio-specific
377 * data, we define an imageioData struct containing references
378 * to the Java object and the IJG structs. The functions
379 * that manipulate these objects know whether input or output is being
380 * performed and therefore know how to manipulate the contents correctly.
381 * If for some reason they don't, the direction can be determined by
382 * checking the is_decompressor field of the jpegObj.
383 * In order for lower level code to determine a
384 * Java object given an IJG struct, such as for dispatching warnings,
385 * we use the client_data field of the jpeg object to store a pointer
386 * to the imageIOData object. Maintenance of this pointer is performed
387 * exclusively within the following access functions. If you
388 * change that, you run the risk of dangling pointers.
389 */
390 typedef struct imageIODataStruct {
391 j_common_ptr jpegObj; // Either struct is fine
392 jobject imageIOobj; // A JPEGImageReader or a JPEGImageWriter
393
394 streamBuffer streamBuf; // Buffer for the stream
395 pixelBuffer pixelBuf; // Buffer for pixels
396
397 jboolean abortFlag; // Passed down from Java abort method
398 } imageIOData, *imageIODataPtr;
399
400 /*
401 * Allocate and initialize a new imageIOData object to associate the
402 * jpeg object and the Java object. Returns a pointer to the new object
403 * on success, NULL on failure.
404 */
405 static imageIODataPtr initImageioData (JNIEnv *env,
406 j_common_ptr cinfo,
407 jobject obj) {
408
409 imageIODataPtr data = (imageIODataPtr) malloc (sizeof(imageIOData));
410 if (data == NULL) {
411 return NULL;
412 }
413
414 data->jpegObj = cinfo;
415 cinfo->client_data = data;
416
417 #ifdef DEBUG_IIO_JPEG
418 printf("new structures: data is %p, cinfo is %p\n", data, cinfo);
419 #endif
420
421 data->imageIOobj = (*env)->NewWeakGlobalRef(env, obj);
422 if (data->imageIOobj == NULL) {
423 free (data);
424 return NULL;
425 }
426 if (initStreamBuffer(env, &data->streamBuf) == NOT_OK) {
427 (*env)->DeleteWeakGlobalRef(env, data->imageIOobj);
428 free (data);
429 return NULL;
430 }
431 initPixelBuffer(&data->pixelBuf);
432
433 data->abortFlag = JNI_FALSE;
434
435 return data;
436 }
437
438 /*
439 * Resets the imageIOData object to its initial state, as though
440 * it had just been allocated and initialized.
441 */
442 static void resetImageIOData(JNIEnv *env, imageIODataPtr data) {
443 resetStreamBuffer(env, &data->streamBuf);
444 resetPixelBuffer(env, &data->pixelBuf);
445 data->abortFlag = JNI_FALSE;
446 }
447
448 /*
449 * Releases all resources held by this object and its subobjects,
450 * frees the object, and returns the jpeg object. This method must
451 * be called to avoid leaking global references.
452 * Note that the jpeg object is not freed or destroyed, as that is
453 * the client's responsibility, although the client_data field is
454 * cleared.
455 */
456 static j_common_ptr destroyImageioData(JNIEnv *env, imageIODataPtr data) {
457 j_common_ptr ret = data->jpegObj;
458 (*env)->DeleteWeakGlobalRef(env, data->imageIOobj);
459 destroyStreamBuffer(env, &data->streamBuf);
460 resetPixelBuffer(env, &data->pixelBuf);
461 ret->client_data = NULL;
462 free(data);
463 return ret;
464 }
465
466 /******************** end ImageIOData definition ***********************/
467
468 /******************** Java array pinning and unpinning *****************/
469
470 /* We use Get/ReleasePrimitiveArrayCritical functions to avoid
471 * the need to copy array elements for the above two objects.
472 *
473 * MAKE SURE TO:
474 *
475 * - carefully insert pairs of RELEASE_ARRAYS and GET_ARRAYS around
476 * callbacks to Java.
477 * - call RELEASE_ARRAYS before returning to Java.
478 *
479 * Otherwise things will go horribly wrong. There may be memory leaks,
480 * excessive pinning, or even VM crashes!
481 *
482 * Note that GetPrimitiveArrayCritical may fail!
483 */
484
485 /*
486 * Release (unpin) all the arrays in use during a read.
487 */
488 static void RELEASE_ARRAYS(JNIEnv *env, imageIODataPtr data, const JOCTET *next_byte)
489 {
490 unpinStreamBuffer(env, &data->streamBuf, next_byte);
491
492 unpinPixelBuffer(env, &data->pixelBuf);
493
494 }
495
496 /*
497 * Get (pin) all the arrays in use during a read.
498 */
499 static int GET_ARRAYS(JNIEnv *env, imageIODataPtr data, const JOCTET **next_byte) {
500 if (pinStreamBuffer(env, &data->streamBuf, next_byte) == NOT_OK) {
501 return NOT_OK;
502 }
503
504 if (pinPixelBuffer(env, &data->pixelBuf) == NOT_OK) {
505 RELEASE_ARRAYS(env, data, *next_byte);
506 return NOT_OK;
507 }
508 return OK;
509 }
510
511 /****** end of Java array pinning and unpinning ***********/
512
513 /****** Error Handling *******/
514
515 /*
516 * Set up error handling to use setjmp/longjmp. This is the third such
517 * setup, as both the AWT jpeg decoder and the com.sun... JPEG classes
518 * setup thier own. Ultimately these should be integrated, as they all
519 * do pretty much the same thing.
520 */
521
522 struct sun_jpeg_error_mgr {
523 struct jpeg_error_mgr pub; /* "public" fields */
524
525 jmp_buf setjmp_buffer; /* for return to caller */
526 };
527
528 typedef struct sun_jpeg_error_mgr * sun_jpeg_error_ptr;
529
530 /*
531 * Here's the routine that will replace the standard error_exit method:
532 */
533
534 METHODDEF(void)
535 sun_jpeg_error_exit (j_common_ptr cinfo)
536 {
537 /* cinfo->err really points to a sun_jpeg_error_mgr struct */
538 sun_jpeg_error_ptr myerr = (sun_jpeg_error_ptr) cinfo->err;
539
540 /* For Java, we will format the message and put it in the error we throw. */
541
542 /* Return control to the setjmp point */
543 longjmp(myerr->setjmp_buffer, 1);
544 }
545
546 /*
547 * Error Message handling
548 *
549 * This overrides the output_message method to send JPEG messages
550 *
551 */
552
553 METHODDEF(void)
554 sun_jpeg_output_message (j_common_ptr cinfo)
555 {
556 char buffer[JMSG_LENGTH_MAX];
557 jstring string;
558 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
559 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
560 jobject theObject;
561
562 /* Create the message */
563 (*cinfo->err->format_message) (cinfo, buffer);
564
565 // Create a new java string from the message
566 string = (*env)->NewStringUTF(env, buffer);
567 CHECK_NULL(string);
568
569 theObject = data->imageIOobj;
570
571 if (cinfo->is_decompressor) {
572 struct jpeg_source_mgr *src = ((j_decompress_ptr)cinfo)->src;
573 RELEASE_ARRAYS(env, data, src->next_input_byte);
574 (*env)->CallVoidMethod(env, theObject,
575 JPEGImageReader_warningWithMessageID,
576 string);
577 if ((*env)->ExceptionOccurred(env)
578 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
579 cinfo->err->error_exit(cinfo);
580 }
581 } else {
582 struct jpeg_destination_mgr *dest = ((j_compress_ptr)cinfo)->dest;
583 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
584 (*env)->CallVoidMethod(env, theObject,
585 JPEGImageWriter_warningWithMessageID,
586 string);
587 if ((*env)->ExceptionOccurred(env)
588 || !GET_ARRAYS(env, data,
589 (const JOCTET **)(&dest->next_output_byte))) {
590 cinfo->err->error_exit(cinfo);
591 }
592 }
593 }
594
595 /* End of verbatim copy from jpegdecoder.c */
596
597 /*************** end of error handling *********************/
598
599 /*************** Shared utility code ***********************/
600
601 static void imageio_set_stream(JNIEnv *env,
602 j_common_ptr cinfo,
603 imageIODataPtr data,
604 jobject io){
605 streamBufferPtr sb;
606 sun_jpeg_error_ptr jerr;
607
608 sb = &data->streamBuf;
609
610 resetStreamBuffer(env, sb); // Removes any old stream
611
612 /* Now we need a new weak global reference for the I/O provider */
613 if (io != NULL) { // Fix for 4411955
614 sb->ioRef = (*env)->NewWeakGlobalRef(env, io);
615 CHECK_NULL(sb->ioRef);
616 }
617
618 /* And finally reset state */
619 data->abortFlag = JNI_FALSE;
620
621 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
622 jerr = (sun_jpeg_error_ptr) cinfo->err;
623
624 if (setjmp(jerr->setjmp_buffer)) {
625 /* If we get here, the JPEG code has signaled an error
626 while aborting. */
627 if (!(*env)->ExceptionOccurred(env)) {
628 char buffer[JMSG_LENGTH_MAX];
629 (*cinfo->err->format_message) (cinfo,
630 buffer);
631 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
632 }
633 return;
634 }
635
636 jpeg_abort(cinfo); // Frees any markers, but not tables
637
638 }
639
640 static void imageio_reset(JNIEnv *env,
641 j_common_ptr cinfo,
642 imageIODataPtr data) {
643 sun_jpeg_error_ptr jerr;
644
645 resetImageIOData(env, data); // Mapping to jpeg object is retained.
646
647 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
648 jerr = (sun_jpeg_error_ptr) cinfo->err;
649
650 if (setjmp(jerr->setjmp_buffer)) {
651 /* If we get here, the JPEG code has signaled an error
652 while aborting. */
653 if (!(*env)->ExceptionOccurred(env)) {
654 char buffer[JMSG_LENGTH_MAX];
655 (*cinfo->err->format_message) (cinfo, buffer);
656 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
657 }
658 return;
659 }
660
661 jpeg_abort(cinfo); // Does not reset tables
662
663 }
664
665 static void imageio_dispose(j_common_ptr info) {
666
667 if (info != NULL) {
668 free(info->err);
669 info->err = NULL;
670 if (info->is_decompressor) {
671 j_decompress_ptr dinfo = (j_decompress_ptr) info;
672 free(dinfo->src);
673 dinfo->src = NULL;
674 } else {
675 j_compress_ptr cinfo = (j_compress_ptr) info;
676 free(cinfo->dest);
677 cinfo->dest = NULL;
678 }
679 jpeg_destroy(info);
680 free(info);
681 }
682 }
683
684 static void imageio_abort(JNIEnv *env, jobject this,
685 imageIODataPtr data) {
686 data->abortFlag = JNI_TRUE;
687 }
688
689 static int setQTables(JNIEnv *env,
690 j_common_ptr cinfo,
691 jobjectArray qtables,
692 boolean write) {
693 jsize qlen;
694 jobject table;
695 jintArray qdata;
696 jint *qdataBody;
697 JQUANT_TBL *quant_ptr;
698 int i, j;
699 j_compress_ptr comp;
700 j_decompress_ptr decomp;
701
702 qlen = (*env)->GetArrayLength(env, qtables);
703 #ifdef DEBUG_IIO_JPEG
704 printf("in setQTables, qlen = %d, write is %d\n", qlen, write);
705 #endif
706 if (qlen > NUM_QUANT_TBLS) {
707 /* Ignore extra qunterization tables. */
708 qlen = NUM_QUANT_TBLS;
709 }
710 for (i = 0; i < qlen; i++) {
711 table = (*env)->GetObjectArrayElement(env, qtables, i);
712 CHECK_NULL_RETURN(table, 0);
713 qdata = (*env)->GetObjectField(env, table, JPEGQTable_tableID);
714 qdataBody = (*env)->GetPrimitiveArrayCritical(env, qdata, NULL);
715
716 if (cinfo->is_decompressor) {
717 decomp = (j_decompress_ptr) cinfo;
718 if (decomp->quant_tbl_ptrs[i] == NULL) {
719 decomp->quant_tbl_ptrs[i] =
720 jpeg_alloc_quant_table(cinfo);
721 }
722 quant_ptr = decomp->quant_tbl_ptrs[i];
723 } else {
724 comp = (j_compress_ptr) cinfo;
725 if (comp->quant_tbl_ptrs[i] == NULL) {
726 comp->quant_tbl_ptrs[i] =
727 jpeg_alloc_quant_table(cinfo);
728 }
729 quant_ptr = comp->quant_tbl_ptrs[i];
730 }
731
732 for (j = 0; j < 64; j++) {
733 quant_ptr->quantval[j] = (UINT16)qdataBody[j];
734 }
735 quant_ptr->sent_table = !write;
736 (*env)->ReleasePrimitiveArrayCritical(env,
737 qdata,
738 qdataBody,
739 0);
740 }
741 return qlen;
742 }
743
744 static boolean setHuffTable(JNIEnv *env,
745 JHUFF_TBL *huff_ptr,
746 jobject table) {
747
748 jshortArray huffLens;
749 jshortArray huffValues;
750 jshort *hlensBody, *hvalsBody;
751 jsize hlensLen, hvalsLen;
752 int i;
753
754 // lengths
755 huffLens = (*env)->GetObjectField(env,
756 table,
757 JPEGHuffmanTable_lengthsID);
758 hlensLen = (*env)->GetArrayLength(env, huffLens);
759 hlensBody = (*env)->GetShortArrayElements(env,
760 huffLens,
761 NULL);
762 CHECK_NULL_RETURN(hlensBody, FALSE);
763
764 if (hlensLen > 16) {
765 /* Ignore extra elements of bits array. Only 16 elements can be
766 stored. 0-th element is not used. (see jpeglib.h, line 107) */
767 hlensLen = 16;
768 }
769 for (i = 1; i <= hlensLen; i++) {
770 huff_ptr->bits[i] = (UINT8)hlensBody[i-1];
771 }
772 (*env)->ReleaseShortArrayElements(env,
773 huffLens,
774 hlensBody,
775 JNI_ABORT);
776 // values
777 huffValues = (*env)->GetObjectField(env,
778 table,
779 JPEGHuffmanTable_valuesID);
780 hvalsLen = (*env)->GetArrayLength(env, huffValues);
781 hvalsBody = (*env)->GetShortArrayElements(env,
782 huffValues,
783 NULL);
784 CHECK_NULL_RETURN(hvalsBody, FALSE);
785
786 if (hvalsLen > 256) {
787 /* Ignore extra elements of hufval array. Only 256 elements
788 can be stored. (see jpeglib.h, line 109) */
789 hlensLen = 256;
790 }
791 for (i = 0; i < hvalsLen; i++) {
792 huff_ptr->huffval[i] = (UINT8)hvalsBody[i];
793 }
794 (*env)->ReleaseShortArrayElements(env,
795 huffValues,
796 hvalsBody,
797 JNI_ABORT);
798 return TRUE;
799 }
800
801 static int setHTables(JNIEnv *env,
802 j_common_ptr cinfo,
803 jobjectArray DCHuffmanTables,
804 jobjectArray ACHuffmanTables,
805 boolean write) {
806 int i;
807 jobject table;
808 JHUFF_TBL *huff_ptr;
809 j_compress_ptr comp;
810 j_decompress_ptr decomp;
811 jsize hlen = (*env)->GetArrayLength(env, DCHuffmanTables);
812
813 if (hlen > NUM_HUFF_TBLS) {
814 /* Ignore extra DC huffman tables. */
815 hlen = NUM_HUFF_TBLS;
816 }
817 for (i = 0; i < hlen; i++) {
818 if (cinfo->is_decompressor) {
819 decomp = (j_decompress_ptr) cinfo;
820 if (decomp->dc_huff_tbl_ptrs[i] == NULL) {
821 decomp->dc_huff_tbl_ptrs[i] =
822 jpeg_alloc_huff_table(cinfo);
823 }
824 huff_ptr = decomp->dc_huff_tbl_ptrs[i];
825 } else {
826 comp = (j_compress_ptr) cinfo;
827 if (comp->dc_huff_tbl_ptrs[i] == NULL) {
828 comp->dc_huff_tbl_ptrs[i] =
829 jpeg_alloc_huff_table(cinfo);
830 }
831 huff_ptr = comp->dc_huff_tbl_ptrs[i];
832 }
833 table = (*env)->GetObjectArrayElement(env, DCHuffmanTables, i);
834 if (table == NULL || !setHuffTable(env, huff_ptr, table)) {
835 return 0;
836 }
837 huff_ptr->sent_table = !write;
838 }
839 hlen = (*env)->GetArrayLength(env, ACHuffmanTables);
840 if (hlen > NUM_HUFF_TBLS) {
841 /* Ignore extra AC huffman tables. */
842 hlen = NUM_HUFF_TBLS;
843 }
844 for (i = 0; i < hlen; i++) {
845 if (cinfo->is_decompressor) {
846 decomp = (j_decompress_ptr) cinfo;
847 if (decomp->ac_huff_tbl_ptrs[i] == NULL) {
848 decomp->ac_huff_tbl_ptrs[i] =
849 jpeg_alloc_huff_table(cinfo);
850 }
851 huff_ptr = decomp->ac_huff_tbl_ptrs[i];
852 } else {
853 comp = (j_compress_ptr) cinfo;
854 if (comp->ac_huff_tbl_ptrs[i] == NULL) {
855 comp->ac_huff_tbl_ptrs[i] =
856 jpeg_alloc_huff_table(cinfo);
857 }
858 huff_ptr = comp->ac_huff_tbl_ptrs[i];
859 }
860 table = (*env)->GetObjectArrayElement(env, ACHuffmanTables, i);
861 if(table == NULL || !setHuffTable(env, huff_ptr, table)) {
862 return 0;
863 }
864 huff_ptr->sent_table = !write;
865 }
866 return hlen;
867 }
868
869
870 /*************** end of shared utility code ****************/
871
872 /********************** Reader Support **************************/
873
874 /********************** Source Management ***********************/
875
876 /*
877 * INPUT HANDLING:
878 *
879 * The JPEG library's input management is defined by the jpeg_source_mgr
880 * structure which contains two fields to convey the information in the
881 * buffer and 5 methods which perform all buffer management. The library
882 * defines a standard input manager that uses stdio for obtaining compressed
883 * jpeg data, but here we need to use Java to get our data.
884 *
885 * We use the library jpeg_source_mgr but our own routines that access
886 * imageio-specific information in the imageIOData structure.
887 */
888
889 /*
890 * Initialize source. This is called by jpeg_read_header() before any
891 * data is actually read. Unlike init_destination(), it may leave
892 * bytes_in_buffer set to 0 (in which case a fill_input_buffer() call
893 * will occur immediately).
894 */
895
896 GLOBAL(void)
897 imageio_init_source(j_decompress_ptr cinfo)
898 {
899 struct jpeg_source_mgr *src = cinfo->src;
900 src->next_input_byte = NULL;
901 src->bytes_in_buffer = 0;
902 }
903
904 /*
905 * This is called whenever bytes_in_buffer has reached zero and more
906 * data is wanted. In typical applications, it should read fresh data
907 * into the buffer (ignoring the current state of next_input_byte and
908 * bytes_in_buffer), reset the pointer & count to the start of the
909 * buffer, and return TRUE indicating that the buffer has been reloaded.
910 * It is not necessary to fill the buffer entirely, only to obtain at
911 * least one more byte. bytes_in_buffer MUST be set to a positive value
912 * if TRUE is returned. A FALSE return should only be used when I/O
913 * suspension is desired (this mode is discussed in the next section).
914 */
915 /*
916 * Note that with I/O suspension turned on, this procedure should not
917 * do any work since the JPEG library has a very simple backtracking
918 * mechanism which relies on the fact that the buffer will be filled
919 * only when it has backed out to the top application level. When
920 * suspendable is turned on, imageio_fill_suspended_buffer will
921 * do the actual work of filling the buffer.
922 */
923
924 GLOBAL(boolean)
925 imageio_fill_input_buffer(j_decompress_ptr cinfo)
926 {
927 struct jpeg_source_mgr *src = cinfo->src;
928 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
929 streamBufferPtr sb = &data->streamBuf;
930 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
931 int ret;
932 jobject input = NULL;
933
934 /* This is where input suspends */
935 if (sb->suspendable) {
936 return FALSE;
937 }
938
939 #ifdef DEBUG_IIO_JPEG
940 printf("Filling input buffer, remaining skip is %ld, ",
941 sb->remaining_skip);
942 printf("Buffer length is %d\n", sb->bufferLength);
943 #endif
944
945 /*
946 * Definitively skips. Could be left over if we tried to skip
947 * more than a buffer's worth but suspended when getting the next
948 * buffer. Now we aren't suspended, so we can catch up.
949 */
950 if (sb->remaining_skip) {
951 src->skip_input_data(cinfo, 0);
952 }
953
954 /*
955 * Now fill a complete buffer, or as much of one as the stream
956 * will give us if we are near the end.
957 */
958 RELEASE_ARRAYS(env, data, src->next_input_byte);
959
960 GET_IO_REF(input);
961
962 ret = (*env)->CallIntMethod(env,
963 input,
964 JPEGImageReader_readInputDataID,
965 sb->hstreamBuffer, 0,
966 sb->bufferLength);
967 if ((ret > 0) && ((unsigned int)ret > sb->bufferLength)) {
968 ret = (int)sb->bufferLength;
969 }
970 if ((*env)->ExceptionOccurred(env)
971 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
972 cinfo->err->error_exit((j_common_ptr) cinfo);
973 }
974
975 #ifdef DEBUG_IIO_JPEG
976 printf("Buffer filled. ret = %d\n", ret);
977 #endif
978 /*
979 * If we have reached the end of the stream, then the EOI marker
980 * is missing. We accept such streams but generate a warning.
981 * The image is likely to be corrupted, though everything through
982 * the end of the last complete MCU should be usable.
983 */
984 if (ret <= 0) {
985 jobject reader = data->imageIOobj;
986 #ifdef DEBUG_IIO_JPEG
987 printf("YO! Early EOI! ret = %d\n", ret);
988 #endif
989 RELEASE_ARRAYS(env, data, src->next_input_byte);
990 (*env)->CallVoidMethod(env, reader,
991 JPEGImageReader_warningOccurredID,
992 READ_NO_EOI);
993 if ((*env)->ExceptionOccurred(env)
994 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
995 cinfo->err->error_exit((j_common_ptr) cinfo);
996 }
997
998 sb->buf[0] = (JOCTET) 0xFF;
999 sb->buf[1] = (JOCTET) JPEG_EOI;
1000 ret = 2;
1001 }
1002
1003 src->next_input_byte = sb->buf;
1004 src->bytes_in_buffer = ret;
1005
1006 return TRUE;
1007 }
1008
1009 /*
1010 * With I/O suspension turned on, the JPEG library requires that all
1011 * buffer filling be done at the top application level, using this
1012 * function. Due to the way that backtracking works, this procedure
1013 * saves all of the data that was left in the buffer when suspension
1014 * occurred and read new data only at the end.
1015 */
1016
1017 GLOBAL(void)
1018 imageio_fill_suspended_buffer(j_decompress_ptr cinfo)
1019 {
1020 struct jpeg_source_mgr *src = cinfo->src;
1021 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1022 streamBufferPtr sb = &data->streamBuf;
1023 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1024 jint ret;
1025 size_t offset, buflen;
1026 jobject input = NULL;
1027
1028 /*
1029 * The original (jpegdecoder.c) had code here that called
1030 * InputStream.available and just returned if the number of bytes
1031 * available was less than any remaining skip. Presumably this was
1032 * to avoid blocking, although the benefit was unclear, as no more
1033 * decompression can take place until more data is available, so
1034 * the code would block on input a little further along anyway.
1035 * ImageInputStreams don't have an available method, so we'll just
1036 * block in the skip if we have to.
1037 */
1038
1039 if (sb->remaining_skip) {
1040 src->skip_input_data(cinfo, 0);
1041 }
1042
1043 /* Save the data currently in the buffer */
1044 offset = src->bytes_in_buffer;
1045 if (src->next_input_byte > sb->buf) {
1046 memcpy(sb->buf, src->next_input_byte, offset);
1047 }
1048
1049
1050 RELEASE_ARRAYS(env, data, src->next_input_byte);
1051
1052 GET_IO_REF(input);
1053
1054 buflen = sb->bufferLength - offset;
1055 if (buflen <= 0) {
1056 if (!GET_ARRAYS(env, data, &(src->next_input_byte))) {
1057 cinfo->err->error_exit((j_common_ptr) cinfo);
1058 }
1059 RELEASE_ARRAYS(env, data, src->next_input_byte);
1060 return;
1061 }
1062
1063 ret = (*env)->CallIntMethod(env, input,
1064 JPEGImageReader_readInputDataID,
1065 sb->hstreamBuffer,
1066 offset, buflen);
1067 if ((ret > 0) && ((unsigned int)ret > buflen)) ret = (int)buflen;
1068 if ((*env)->ExceptionOccurred(env)
1069 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1070 cinfo->err->error_exit((j_common_ptr) cinfo);
1071 }
1072 /*
1073 * If we have reached the end of the stream, then the EOI marker
1074 * is missing. We accept such streams but generate a warning.
1075 * The image is likely to be corrupted, though everything through
1076 * the end of the last complete MCU should be usable.
1077 */
1078 if (ret <= 0) {
1079 jobject reader = data->imageIOobj;
1080 RELEASE_ARRAYS(env, data, src->next_input_byte);
1081 (*env)->CallVoidMethod(env, reader,
1082 JPEGImageReader_warningOccurredID,
1083 READ_NO_EOI);
1084 if ((*env)->ExceptionOccurred(env)
1085 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1086 cinfo->err->error_exit((j_common_ptr) cinfo);
1087 }
1088
1089 sb->buf[offset] = (JOCTET) 0xFF;
1090 sb->buf[offset + 1] = (JOCTET) JPEG_EOI;
1091 ret = 2;
1092 }
1093
1094 src->next_input_byte = sb->buf;
1095 src->bytes_in_buffer = ret + offset;
1096
1097 return;
1098 }
1099
1100 /*
1101 * Skip num_bytes worth of data. The buffer pointer and count are
1102 * advanced over num_bytes input bytes, using the input stream
1103 * skipBytes method if the skip is greater than the number of bytes
1104 * in the buffer. This is used to skip over a potentially large amount of
1105 * uninteresting data (such as an APPn marker). bytes_in_buffer will be
1106 * zero on return if the skip is larger than the current contents of the
1107 * buffer.
1108 *
1109 * A negative skip count is treated as a no-op. A zero skip count
1110 * skips any remaining skip from a previous skip while suspended.
1111 *
1112 * Note that with I/O suspension turned on, this procedure does not
1113 * call skipBytes since the JPEG library has a very simple backtracking
1114 * mechanism which relies on the fact that the application level has
1115 * exclusive control over actual I/O.
1116 */
1117
1118 GLOBAL(void)
1119 imageio_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
1120 {
1121 struct jpeg_source_mgr *src = cinfo->src;
1122 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1123 streamBufferPtr sb = &data->streamBuf;
1124 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1125 jlong ret;
1126 jobject reader;
1127 jobject input = NULL;
1128
1129 if (num_bytes < 0) {
1130 return;
1131 }
1132 num_bytes += sb->remaining_skip;
1133 sb->remaining_skip = 0;
1134
1135 /* First the easy case where we are skipping <= the current contents. */
1136 ret = src->bytes_in_buffer;
1137 if (ret >= num_bytes) {
1138 src->next_input_byte += num_bytes;
1139 src->bytes_in_buffer -= num_bytes;
1140 return;
1141 }
1142
1143 /*
1144 * We are skipping more than is in the buffer. We empty the buffer and,
1145 * if we aren't suspended, call the Java skipBytes method. We always
1146 * leave the buffer empty, to be filled by either fill method above.
1147 */
1148 src->bytes_in_buffer = 0;
1149 src->next_input_byte = sb->buf;
1150
1151 num_bytes -= (long)ret;
1152 if (sb->suspendable) {
1153 sb->remaining_skip = num_bytes;
1154 return;
1155 }
1156
1157 RELEASE_ARRAYS(env, data, src->next_input_byte);
1158
1159 GET_IO_REF(input);
1160
1161 ret = (*env)->CallLongMethod(env,
1162 input,
1163 JPEGImageReader_skipInputBytesID,
1164 (jlong) num_bytes);
1165 if ((*env)->ExceptionOccurred(env)
1166 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1167 cinfo->err->error_exit((j_common_ptr) cinfo);
1168 }
1169
1170 /*
1171 * If we have reached the end of the stream, then the EOI marker
1172 * is missing. We accept such streams but generate a warning.
1173 * The image is likely to be corrupted, though everything through
1174 * the end of the last complete MCU should be usable.
1175 */
1176 if (ret <= 0) {
1177 reader = data->imageIOobj;
1178 RELEASE_ARRAYS(env, data, src->next_input_byte);
1179 (*env)->CallVoidMethod(env,
1180 reader,
1181 JPEGImageReader_warningOccurredID,
1182 READ_NO_EOI);
1183
1184 if ((*env)->ExceptionOccurred(env)
1185 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1186 cinfo->err->error_exit((j_common_ptr) cinfo);
1187 }
1188 sb->buf[0] = (JOCTET) 0xFF;
1189 sb->buf[1] = (JOCTET) JPEG_EOI;
1190 src->bytes_in_buffer = 2;
1191 src->next_input_byte = sb->buf;
1192 }
1193 }
1194
1195 /*
1196 * Terminate source --- called by jpeg_finish_decompress() after all
1197 * data for an image has been read. In our case pushes back any
1198 * remaining data, as it will be for another image and must be available
1199 * for java to find out that there is another image. Also called if
1200 * reseting state after reading a tables-only image.
1201 */
1202
1203 GLOBAL(void)
1204 imageio_term_source(j_decompress_ptr cinfo)
1205 {
1206 // To pushback, just seek back by src->bytes_in_buffer
1207 struct jpeg_source_mgr *src = cinfo->src;
1208 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1209 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1210 jobject reader = data->imageIOobj;
1211 if (src->bytes_in_buffer > 0) {
1212 RELEASE_ARRAYS(env, data, src->next_input_byte);
1213 (*env)->CallVoidMethod(env,
1214 reader,
1215 JPEGImageReader_pushBackID,
1216 src->bytes_in_buffer);
1217
1218 if ((*env)->ExceptionOccurred(env)
1219 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1220 cinfo->err->error_exit((j_common_ptr) cinfo);
1221 }
1222 src->bytes_in_buffer = 0;
1223 //src->next_input_byte = sb->buf;
1224 }
1225 }
1226
1227 /********************* end of source manager ******************/
1228
1229 /********************* ICC profile support ********************/
1230 /*
1231 * The following routines are modified versions of the ICC
1232 * profile support routines available from the IJG website.
1233 * The originals were written by Todd Newman
1234 * <tdn@eccentric.esd.sgi.com> and modified by Tom Lane for
1235 * the IJG. They are further modified to fit in the context
1236 * of the imageio JPEG plug-in.
1237 */
1238
1239 /*
1240 * Since an ICC profile can be larger than the maximum size of a JPEG marker
1241 * (64K), we need provisions to split it into multiple markers. The format
1242 * defined by the ICC specifies one or more APP2 markers containing the
1243 * following data:
1244 * Identifying string ASCII "ICC_PROFILE\0" (12 bytes)
1245 * Marker sequence number 1 for first APP2, 2 for next, etc (1 byte)
1246 * Number of markers Total number of APP2's used (1 byte)
1247 * Profile data (remainder of APP2 data)
1248 * Decoders should use the marker sequence numbers to reassemble the profile,
1249 * rather than assuming that the APP2 markers appear in the correct sequence.
1250 */
1251
1252 #define ICC_MARKER (JPEG_APP0 + 2) /* JPEG marker code for ICC */
1253 #define ICC_OVERHEAD_LEN 14 /* size of non-profile data in APP2 */
1254 #define MAX_BYTES_IN_MARKER 65533 /* maximum data len of a JPEG marker */
1255 #define MAX_DATA_BYTES_IN_ICC_MARKER (MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN)
1256
1257
1258 /*
1259 * Handy subroutine to test whether a saved marker is an ICC profile marker.
1260 */
1261
1262 static boolean
1263 marker_is_icc (jpeg_saved_marker_ptr marker)
1264 {
1265 return
1266 marker->marker == ICC_MARKER &&
1267 marker->data_length >= ICC_OVERHEAD_LEN &&
1268 /* verify the identifying string */
1269 GETJOCTET(marker->data[0]) == 0x49 &&
1270 GETJOCTET(marker->data[1]) == 0x43 &&
1271 GETJOCTET(marker->data[2]) == 0x43 &&
1272 GETJOCTET(marker->data[3]) == 0x5F &&
1273 GETJOCTET(marker->data[4]) == 0x50 &&
1274 GETJOCTET(marker->data[5]) == 0x52 &&
1275 GETJOCTET(marker->data[6]) == 0x4F &&
1276 GETJOCTET(marker->data[7]) == 0x46 &&
1277 GETJOCTET(marker->data[8]) == 0x49 &&
1278 GETJOCTET(marker->data[9]) == 0x4C &&
1279 GETJOCTET(marker->data[10]) == 0x45 &&
1280 GETJOCTET(marker->data[11]) == 0x0;
1281 }
1282
1283 /*
1284 * See if there was an ICC profile in the JPEG file being read;
1285 * if so, reassemble and return the profile data as a new Java byte array.
1286 * If there was no ICC profile, return NULL.
1287 *
1288 * If the file contains invalid ICC APP2 markers, we throw an IIOException
1289 * with an appropriate message.
1290 */
1291
1292 jbyteArray
1293 read_icc_profile (JNIEnv *env, j_decompress_ptr cinfo)
1294 {
1295 jpeg_saved_marker_ptr marker;
1296 int num_markers = 0;
1297 int num_found_markers = 0;
1298 int seq_no;
1299 JOCTET *icc_data;
1300 JOCTET *dst_ptr;
1301 unsigned int total_length;
1302 #define MAX_SEQ_NO 255 // sufficient since marker numbers are bytes
1303 jpeg_saved_marker_ptr icc_markers[MAX_SEQ_NO + 1];
1304 int first; // index of the first marker in the icc_markers array
1305 int last; // index of the last marker in the icc_markers array
1306 jbyteArray data = NULL;
1307
1308 /* This first pass over the saved markers discovers whether there are
1309 * any ICC markers and verifies the consistency of the marker numbering.
1310 */
1311
1312 for (seq_no = 0; seq_no <= MAX_SEQ_NO; seq_no++)
1313 icc_markers[seq_no] = NULL;
1314
1315
1316 for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) {
1317 if (marker_is_icc(marker)) {
1318 if (num_markers == 0)
1319 num_markers = GETJOCTET(marker->data[13]);
1320 else if (num_markers != GETJOCTET(marker->data[13])) {
1321 JNU_ThrowByName(env, "javax/imageio/IIOException",
1322 "Invalid icc profile: inconsistent num_markers fields");
1323 return NULL;
1324 }
1325 seq_no = GETJOCTET(marker->data[12]);
1326
1327 /* Some third-party tools produce images with profile chunk
1328 * numeration started from zero. It is inconsistent with ICC
1329 * spec, but seems to be recognized by majority of image
1330 * processing tools, so we should be more tolerant to this
1331 * departure from the spec.
1332 */
1333 if (seq_no < 0 || seq_no > num_markers) {
1334 JNU_ThrowByName(env, "javax/imageio/IIOException",
1335 "Invalid icc profile: bad sequence number");
1336 return NULL;
1337 }
1338 if (icc_markers[seq_no] != NULL) {
1339 JNU_ThrowByName(env, "javax/imageio/IIOException",
1340 "Invalid icc profile: duplicate sequence numbers");
1341 return NULL;
1342 }
1343 icc_markers[seq_no] = marker;
1344 num_found_markers ++;
1345 }
1346 }
1347
1348 if (num_markers == 0)
1349 return NULL; // There is no profile
1350
1351 if (num_markers != num_found_markers) {
1352 JNU_ThrowByName(env, "javax/imageio/IIOException",
1353 "Invalid icc profile: invalid number of icc markers");
1354 return NULL;
1355 }
1356
1357 first = icc_markers[0] ? 0 : 1;
1358 last = num_found_markers + first;
1359
1360 /* Check for missing markers, count total space needed.
1361 */
1362 total_length = 0;
1363 for (seq_no = first; seq_no < last; seq_no++) {
1364 unsigned int length;
1365 if (icc_markers[seq_no] == NULL) {
1366 JNU_ThrowByName(env, "javax/imageio/IIOException",
1367 "Invalid icc profile: missing sequence number");
1368 return NULL;
1369 }
1370 /* check the data length correctness */
1371 length = icc_markers[seq_no]->data_length;
1372 if (ICC_OVERHEAD_LEN > length || length > MAX_BYTES_IN_MARKER) {
1373 JNU_ThrowByName(env, "javax/imageio/IIOException",
1374 "Invalid icc profile: invalid data length");
1375 return NULL;
1376 }
1377 total_length += (length - ICC_OVERHEAD_LEN);
1378 }
1379
1380 if (total_length <= 0) {
1381 JNU_ThrowByName(env, "javax/imageio/IIOException",
1382 "Invalid icc profile: found only empty markers");
1383 return NULL;
1384 }
1385
1386 /* Allocate a Java byte array for assembled data */
1387
1388 data = (*env)->NewByteArray(env, total_length);
1389 if (data == NULL) {
1390 JNU_ThrowByName(env,
1391 "java/lang/OutOfMemoryError",
1392 "Reading ICC profile");
1393 return NULL;
1394 }
1395
1396 icc_data = (JOCTET *)(*env)->GetPrimitiveArrayCritical(env,
1397 data,
1398 NULL);
1399 if (icc_data == NULL) {
1400 JNU_ThrowByName(env, "javax/imageio/IIOException",
1401 "Unable to pin icc profile data array");
1402 return NULL;
1403 }
1404
1405 /* and fill it in */
1406 dst_ptr = icc_data;
1407 for (seq_no = first; seq_no < last; seq_no++) {
1408 JOCTET FAR *src_ptr = icc_markers[seq_no]->data + ICC_OVERHEAD_LEN;
1409 unsigned int length =
1410 icc_markers[seq_no]->data_length - ICC_OVERHEAD_LEN;
1411
1412 memcpy(dst_ptr, src_ptr, length);
1413 dst_ptr += length;
1414 }
1415
1416 /* finally, unpin the array */
1417 (*env)->ReleasePrimitiveArrayCritical(env,
1418 data,
1419 icc_data,
1420 0);
1421
1422
1423 return data;
1424 }
1425
1426 /********************* end of ICC profile support *************/
1427
1428 /********************* Reader JNI calls ***********************/
1429
1430 JNIEXPORT void JNICALL
1431 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initReaderIDs
1432 (JNIEnv *env,
1433 jclass cls,
1434 jclass ImageInputStreamClass,
1435 jclass qTableClass,
1436 jclass huffClass) {
1437
1438 CHECK_NULL(JPEGImageReader_readInputDataID = (*env)->GetMethodID(env,
1439 cls,
1440 "readInputData",
1441 "([BII)I"));
1442 CHECK_NULL(JPEGImageReader_skipInputBytesID = (*env)->GetMethodID(env,
1443 cls,
1444 "skipInputBytes",
1445 "(J)J"));
1446 CHECK_NULL(JPEGImageReader_warningOccurredID = (*env)->GetMethodID(env,
1447 cls,
1448 "warningOccurred",
1449 "(I)V"));
1450 CHECK_NULL(JPEGImageReader_warningWithMessageID =
1451 (*env)->GetMethodID(env,
1452 cls,
1453 "warningWithMessage",
1454 "(Ljava/lang/String;)V"));
1455 CHECK_NULL(JPEGImageReader_setImageDataID = (*env)->GetMethodID(env,
1456 cls,
1457 "setImageData",
1458 "(IIIII[B)V"));
1459 CHECK_NULL(JPEGImageReader_acceptPixelsID = (*env)->GetMethodID(env,
1460 cls,
1461 "acceptPixels",
1462 "(IZ)V"));
1463 CHECK_NULL(JPEGImageReader_passStartedID = (*env)->GetMethodID(env,
1464 cls,
1465 "passStarted",
1466 "(I)V"));
1467 CHECK_NULL(JPEGImageReader_passCompleteID = (*env)->GetMethodID(env,
1468 cls,
1469 "passComplete",
1470 "()V"));
1471 CHECK_NULL(JPEGImageReader_pushBackID = (*env)->GetMethodID(env,
1472 cls,
1473 "pushBack",
1474 "(I)V"));
1475 CHECK_NULL(JPEGQTable_tableID = (*env)->GetFieldID(env,
1476 qTableClass,
1477 "qTable",
1478 "[I"));
1479
1480 CHECK_NULL(JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env,
1481 huffClass,
1482 "lengths",
1483 "[S"));
1484
1485 CHECK_NULL(JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env,
1486 huffClass,
1487 "values",
1488 "[S"));
1489 }
1490
1491 JNIEXPORT jlong JNICALL
1492 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader
1493 (JNIEnv *env,
1494 jobject this) {
1495
1496 imageIODataPtr ret;
1497 struct sun_jpeg_error_mgr *jerr;
1498
1499 /* This struct contains the JPEG decompression parameters and pointers to
1500 * working space (which is allocated as needed by the JPEG library).
1501 */
1502 struct jpeg_decompress_struct *cinfo =
1503 malloc(sizeof(struct jpeg_decompress_struct));
1504 if (cinfo == NULL) {
1505 JNU_ThrowByName( env,
1506 "java/lang/OutOfMemoryError",
1507 "Initializing Reader");
1508 return 0;
1509 }
1510
1511 /* We use our private extension JPEG error handler.
1512 */
1513 jerr = malloc (sizeof(struct sun_jpeg_error_mgr));
1514 if (jerr == NULL) {
1515 JNU_ThrowByName( env,
1516 "java/lang/OutOfMemoryError",
1517 "Initializing Reader");
1518 free(cinfo);
1519 return 0;
1520 }
1521
1522 /* We set up the normal JPEG error routines, then override error_exit. */
1523 cinfo->err = jpeg_std_error(&(jerr->pub));
1524 jerr->pub.error_exit = sun_jpeg_error_exit;
1525 /* We need to setup our own print routines */
1526 jerr->pub.output_message = sun_jpeg_output_message;
1527 /* Now we can setjmp before every call to the library */
1528
1529 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1530 if (setjmp(jerr->setjmp_buffer)) {
1531 /* If we get here, the JPEG code has signaled an error. */
1532 char buffer[JMSG_LENGTH_MAX];
1533 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1534 buffer);
1535 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1536 return 0;
1537 }
1538
1539 /* Perform library initialization */
1540 jpeg_create_decompress(cinfo);
1541
1542 // Set up to keep any APP2 markers, as these might contain ICC profile
1543 // data
1544 jpeg_save_markers(cinfo, ICC_MARKER, 0xFFFF);
1545
1546 /*
1547 * Now set up our source.
1548 */
1549 cinfo->src =
1550 (struct jpeg_source_mgr *) malloc (sizeof(struct jpeg_source_mgr));
1551 if (cinfo->src == NULL) {
1552 JNU_ThrowByName(env,
1553 "java/lang/OutOfMemoryError",
1554 "Initializing Reader");
1555 imageio_dispose((j_common_ptr)cinfo);
1556 return 0;
1557 }
1558 cinfo->src->bytes_in_buffer = 0;
1559 cinfo->src->next_input_byte = NULL;
1560 cinfo->src->init_source = imageio_init_source;
1561 cinfo->src->fill_input_buffer = imageio_fill_input_buffer;
1562 cinfo->src->skip_input_data = imageio_skip_input_data;
1563 cinfo->src->resync_to_restart = jpeg_resync_to_restart; // use default
1564 cinfo->src->term_source = imageio_term_source;
1565
1566 /* set up the association to persist for future calls */
1567 ret = initImageioData(env, (j_common_ptr) cinfo, this);
1568 if (ret == NULL) {
1569 (*env)->ExceptionClear(env);
1570 JNU_ThrowByName(env, "java/lang/OutOfMemoryError",
1571 "Initializing Reader");
1572 imageio_dispose((j_common_ptr)cinfo);
1573 return 0;
1574 }
1575 return ptr_to_jlong(ret);
1576 }
1577
1578 /*
1579 * When we set a source from Java, we set up the stream in the streamBuf
1580 * object. If there was an old one, it is released first.
1581 */
1582
1583 JNIEXPORT void JNICALL
1584 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setSource
1585 (JNIEnv *env,
1586 jobject this,
1587 jlong ptr) {
1588
1589 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1590 j_common_ptr cinfo;
1591
1592 if (data == NULL) {
1593 JNU_ThrowByName(env,
1594 "java/lang/IllegalStateException",
1595 "Attempting to use reader after dispose()");
1596 return;
1597 }
1598
1599 cinfo = data->jpegObj;
1600
1601 imageio_set_stream(env, cinfo, data, this);
1602
1603 imageio_init_source((j_decompress_ptr) cinfo);
1604 }
1605
1606 #define JPEG_APP1 (JPEG_APP0 + 1) /* EXIF APP1 marker code */
1607
1608 /*
1609 * For EXIF images, the APP1 will appear immediately after the SOI,
1610 * so it's safe to only look at the first marker in the list.
1611 * (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 58)
1612 */
1613 #define IS_EXIF(c) \
1614 (((c)->marker_list != NULL) && ((c)->marker_list->marker == JPEG_APP1))
1615
1616 JNIEXPORT jboolean JNICALL
1617 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImageHeader
1618 (JNIEnv *env,
1619 jobject this,
1620 jlong ptr,
1621 jboolean clearFirst,
1622 jboolean reset) {
1623
1624 int ret;
1625 int h_samp0, h_samp1, h_samp2;
1626 int v_samp0, v_samp1, v_samp2;
1627 int cid0, cid1, cid2;
1628 jboolean retval = JNI_FALSE;
1629 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1630 j_decompress_ptr cinfo;
1631 struct jpeg_source_mgr *src;
1632 sun_jpeg_error_ptr jerr;
1633 jbyteArray profileData = NULL;
1634
1635 if (data == NULL) {
1636 JNU_ThrowByName(env,
1637 "java/lang/IllegalStateException",
1638 "Attempting to use reader after dispose()");
1639 return JNI_FALSE;
1640 }
1641
1642 cinfo = (j_decompress_ptr) data->jpegObj;
1643 src = cinfo->src;
1644
1645 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1646 jerr = (sun_jpeg_error_ptr) cinfo->err;
1647
1648 if (setjmp(jerr->setjmp_buffer)) {
1649 /* If we get here, the JPEG code has signaled an error
1650 while reading the header. */
1651 RELEASE_ARRAYS(env, data, src->next_input_byte);
1652 if (!(*env)->ExceptionOccurred(env)) {
1653 char buffer[JMSG_LENGTH_MAX];
1654 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1655 buffer);
1656 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1657 }
1658 return retval;
1659 }
1660
1661 #ifdef DEBUG_IIO_JPEG
1662 printf("In readImageHeader, data is %p cinfo is %p\n", data, cinfo);
1663 printf("clearFirst is %d\n", clearFirst);
1664 #endif
1665
1666 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) {
1667 (*env)->ExceptionClear(env);
1668 JNU_ThrowByName(env,
1669 "javax/imageio/IIOException",
1670 "Array pin failed");
1671 return retval;
1672 }
1673
1674 /*
1675 * Now clear the input buffer if the Java code has done a seek
1676 * on the stream since the last call, invalidating any buffer contents.
1677 */
1678 if (clearFirst) {
1679 clearStreamBuffer(&data->streamBuf);
1680 src->next_input_byte = NULL;
1681 src->bytes_in_buffer = 0;
1682 }
1683
1684 ret = jpeg_read_header(cinfo, FALSE);
1685
1686 if (ret == JPEG_HEADER_TABLES_ONLY) {
1687 retval = JNI_TRUE;
1688 imageio_term_source(cinfo); // Pushback remaining buffer contents
1689 #ifdef DEBUG_IIO_JPEG
1690 printf("just read tables-only image; q table 0 at %p\n",
1691 cinfo->quant_tbl_ptrs[0]);
1692 #endif
1693 RELEASE_ARRAYS(env, data, src->next_input_byte);
1694 } else {
1695 /*
1696 * Now adjust the jpeg_color_space variable, which was set in
1697 * default_decompress_parms, to reflect our differences from IJG
1698 */
1699
1700 switch (cinfo->jpeg_color_space) {
1701 default :
1702 break;
1703 case JCS_YCbCr:
1704
1705 /*
1706 * There are several possibilities:
1707 * - we got image with embeded colorspace
1708 * Use it. User knows what he is doing.
1709 * - we got JFIF image
1710 * Must be YCbCr (see http://www.w3.org/Graphics/JPEG/jfif3.pdf, page 2)
1711 * - we got EXIF image
1712 * Must be YCbCr (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 63)
1713 * - something else
1714 * Apply heuristical rules to identify actual colorspace.
1715 */
1716
1717 if (cinfo->saw_Adobe_marker) {
1718 if (cinfo->Adobe_transform != 1) {
1719 /*
1720 * IJG guesses this is YCbCr and emits a warning
1721 * We would rather not guess. Then the user knows
1722 * To read this as a Raster if at all
1723 */
1724 cinfo->jpeg_color_space = JCS_UNKNOWN;
1725 cinfo->out_color_space = JCS_UNKNOWN;
1726 }
1727 } else if (!cinfo->saw_JFIF_marker && !IS_EXIF(cinfo)) {
1728 /*
1729 * In the absence of certain markers, IJG has interpreted
1730 * component id's of [1,2,3] as meaning YCbCr.We follow that
1731 * interpretation, which is additionally described in the Image
1732 * I/O JPEG metadata spec.If that condition is not met here the
1733 * next step will be to examine the subsampling factors, if
1734 * there is any difference in subsampling factors we also assume
1735 * YCbCr, only if both horizontal and vertical subsampling
1736 * is same we assume JPEG color space as RGB.
1737 * This is also described in the Image I/O JPEG metadata spec.
1738 */
1739 h_samp0 = cinfo->comp_info[0].h_samp_factor;
1740 h_samp1 = cinfo->comp_info[1].h_samp_factor;
1741 h_samp2 = cinfo->comp_info[2].h_samp_factor;
1742
1743 v_samp0 = cinfo->comp_info[0].v_samp_factor;
1744 v_samp1 = cinfo->comp_info[1].v_samp_factor;
1745 v_samp2 = cinfo->comp_info[2].v_samp_factor;
1746
1747 cid0 = cinfo->comp_info[0].component_id;
1748 cid1 = cinfo->comp_info[1].component_id;
1749 cid2 = cinfo->comp_info[2].component_id;
1750
1751 if ((!(cid0 == 1 && cid1 == 2 && cid2 == 3)) &&
1752 ((h_samp1 == h_samp0) && (h_samp2 == h_samp0) &&
1753 (v_samp1 == v_samp0) && (v_samp2 == v_samp0)))
1754 {
1755 cinfo->jpeg_color_space = JCS_RGB;
1756 /* output is already RGB, so it stays the same */
1757 }
1758 }
1759 break;
1760 #ifdef YCCALPHA
1761 case JCS_YCC:
1762 cinfo->out_color_space = JCS_YCC;
1763 break;
1764 #endif
1765 case JCS_YCCK:
1766 if ((cinfo->saw_Adobe_marker) && (cinfo->Adobe_transform != 2)) {
1767 /*
1768 * IJG guesses this is YCCK and emits a warning
1769 * We would rather not guess. Then the user knows
1770 * To read this as a Raster if at all
1771 */
1772 cinfo->jpeg_color_space = JCS_UNKNOWN;
1773 cinfo->out_color_space = JCS_UNKNOWN;
1774 }
1775 break;
1776 case JCS_CMYK:
1777 /*
1778 * IJG assumes all unidentified 4-channels are CMYK.
1779 * We assume that only if the second two channels are
1780 * not subsampled (either horizontally or vertically).
1781 * If they are, we assume YCCK.
1782 */
1783 h_samp0 = cinfo->comp_info[0].h_samp_factor;
1784 h_samp1 = cinfo->comp_info[1].h_samp_factor;
1785 h_samp2 = cinfo->comp_info[2].h_samp_factor;
1786
1787 v_samp0 = cinfo->comp_info[0].v_samp_factor;
1788 v_samp1 = cinfo->comp_info[1].v_samp_factor;
1789 v_samp2 = cinfo->comp_info[2].v_samp_factor;
1790
1791 if (((h_samp1 > h_samp0) && (h_samp2 > h_samp0)) ||
1792 ((v_samp1 > v_samp0) && (v_samp2 > v_samp0)))
1793 {
1794 cinfo->jpeg_color_space = JCS_YCCK;
1795 /* Leave the output space as CMYK */
1796 }
1797 }
1798 RELEASE_ARRAYS(env, data, src->next_input_byte);
1799
1800 /* read icc profile data */
1801 profileData = read_icc_profile(env, cinfo);
1802
1803 if ((*env)->ExceptionCheck(env)) {
1804 return retval;
1805 }
1806
1807 (*env)->CallVoidMethod(env, this,
1808 JPEGImageReader_setImageDataID,
1809 cinfo->image_width,
1810 cinfo->image_height,
1811 cinfo->jpeg_color_space,
1812 cinfo->out_color_space,
1813 cinfo->num_components,
1814 profileData);
1815 if ((*env)->ExceptionOccurred(env)
1816 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1817 cinfo->err->error_exit((j_common_ptr) cinfo);
1818 }
1819 if (reset) {
1820 jpeg_abort_decompress(cinfo);
1821 }
1822 RELEASE_ARRAYS(env, data, src->next_input_byte);
1823 }
1824
1825 return retval;
1826 }
1827
1828
1829 JNIEXPORT void JNICALL
1830 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setOutColorSpace
1831 (JNIEnv *env,
1832 jobject this,
1833 jlong ptr,
1834 jint code) {
1835
1836 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1837 j_decompress_ptr cinfo;
1838
1839 if (data == NULL) {
1840 JNU_ThrowByName(env,
1841 "java/lang/IllegalStateException",
1842 "Attempting to use reader after dispose()");
1843 return;
1844 }
1845
1846 cinfo = (j_decompress_ptr) data->jpegObj;
1847
1848 cinfo->out_color_space = code;
1849
1850 }
1851
1852 JNIEXPORT jboolean JNICALL
1853 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImage
1854 (JNIEnv *env,
1855 jobject this,
1856 jlong ptr,
1857 jbyteArray buffer,
1858 jint numBands,
1859 jintArray srcBands,
1860 jintArray bandSizes,
1861 jint sourceXStart,
1862 jint sourceYStart,
1863 jint sourceWidth,
1864 jint sourceHeight,
1865 jint stepX,
1866 jint stepY,
1867 jobjectArray qtables,
1868 jobjectArray DCHuffmanTables,
1869 jobjectArray ACHuffmanTables,
1870 jint minProgressivePass, // Counts from 0
1871 jint maxProgressivePass,
1872 jboolean wantUpdates) {
1873
1874
1875 struct jpeg_source_mgr *src;
1876 JSAMPROW scanLinePtr = NULL;
1877 jint bands[MAX_BANDS];
1878 int i;
1879 jint *body;
1880 int scanlineLimit;
1881 int pixelStride;
1882 unsigned char *in, *out, *pixelLimit;
1883 int targetLine;
1884 int skipLines, linesLeft;
1885 pixelBufferPtr pb;
1886 sun_jpeg_error_ptr jerr;
1887 boolean done;
1888 boolean progressive = FALSE;
1889 boolean orderedBands = TRUE;
1890 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1891 j_decompress_ptr cinfo;
1892 size_t numBytes;
1893
1894 /* verify the inputs */
1895
1896 if (data == NULL) {
1897 JNU_ThrowByName(env,
1898 "java/lang/IllegalStateException",
1899 "Attempting to use reader after dispose()");
1900 return JNI_FALSE;
1901 }
1902
1903 if ((buffer == NULL) || (srcBands == NULL)) {
1904 JNU_ThrowNullPointerException(env, 0);
1905 return JNI_FALSE;
1906 }
1907
1908 cinfo = (j_decompress_ptr) data->jpegObj;
1909
1910 if ((numBands < 1) || (numBands > MAX_BANDS) ||
1911 (sourceXStart < 0) || (sourceXStart >= (jint)cinfo->image_width) ||
1912 (sourceYStart < 0) || (sourceYStart >= (jint)cinfo->image_height) ||
1913 (sourceWidth < 1) || (sourceWidth > (jint)cinfo->image_width) ||
1914 (sourceHeight < 1) || (sourceHeight > (jint)cinfo->image_height) ||
1915 (stepX < 1) || (stepY < 1) ||
1916 (minProgressivePass < 0) ||
1917 (maxProgressivePass < minProgressivePass))
1918 {
1919 JNU_ThrowByName(env, "javax/imageio/IIOException",
1920 "Invalid argument to native readImage");
1921 return JNI_FALSE;
1922 }
1923
1924 if (stepX > (jint)cinfo->image_width) {
1925 stepX = cinfo->image_width;
1926 }
1927 if (stepY > (jint)cinfo->image_height) {
1928 stepY = cinfo->image_height;
1929 }
1930
1931 /*
1932 * First get the source bands array and copy it to our local array
1933 * so we don't have to worry about pinning and unpinning it again.
1934 */
1935
1936 body = (*env)->GetIntArrayElements(env, srcBands, NULL);
1937 if (body == NULL) {
1938 (*env)->ExceptionClear(env);
1939 JNU_ThrowByName( env,
1940 "java/lang/OutOfMemoryError",
1941 "Initializing Read");
1942 return JNI_FALSE;
1943 }
1944
1945 for (i = 0; i < numBands; i++) {
1946 bands[i] = body[i];
1947 if (orderedBands && (bands[i] != i)) {
1948 orderedBands = FALSE;
1949 }
1950 }
1951
1952 (*env)->ReleaseIntArrayElements(env, srcBands, body, JNI_ABORT);
1953
1954 #ifdef DEBUG_IIO_JPEG
1955 printf("---- in reader.read ----\n");
1956 printf("numBands is %d\n", numBands);
1957 printf("bands array: ");
1958 for (i = 0; i < numBands; i++) {
1959 printf("%d ", bands[i]);
1960 }
1961 printf("\n");
1962 printf("jq table 0 at %p\n",
1963 cinfo->quant_tbl_ptrs[0]);
1964 #endif
1965
1966 data = (imageIODataPtr) cinfo->client_data;
1967 src = cinfo->src;
1968
1969 /* Set the buffer as our PixelBuffer */
1970 pb = &data->pixelBuf;
1971
1972 if (setPixelBuffer(env, pb, buffer) == NOT_OK) {
1973 return data->abortFlag; // We already threw an out of memory exception
1974 }
1975
1976 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1977 jerr = (sun_jpeg_error_ptr) cinfo->err;
1978
1979 if (setjmp(jerr->setjmp_buffer)) {
1980 /* If we get here, the JPEG code has signaled an error
1981 while reading. */
1982 RELEASE_ARRAYS(env, data, src->next_input_byte);
1983 if (!(*env)->ExceptionOccurred(env)) {
1984 char buffer[JMSG_LENGTH_MAX];
1985 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1986 buffer);
1987 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1988 }
1989 if (scanLinePtr != NULL) {
1990 free(scanLinePtr);
1991 scanLinePtr = NULL;
1992 }
1993 return data->abortFlag;
1994 }
1995
1996 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) {
1997 (*env)->ExceptionClear(env);
1998 JNU_ThrowByName(env,
1999 "javax/imageio/IIOException",
2000 "Array pin failed");
2001 return data->abortFlag;
2002 }
2003
2004 // If there are no tables in our structure and table arguments aren't
2005 // NULL, use the table arguments.
2006 if ((qtables != NULL) && (cinfo->quant_tbl_ptrs[0] == NULL)) {
2007 (void) setQTables(env, (j_common_ptr) cinfo, qtables, TRUE);
2008 }
2009
2010 if ((DCHuffmanTables != NULL) && (cinfo->dc_huff_tbl_ptrs[0] == NULL)) {
2011 setHTables(env, (j_common_ptr) cinfo,
2012 DCHuffmanTables,
2013 ACHuffmanTables,
2014 TRUE);
2015 }
2016
2017 progressive = jpeg_has_multiple_scans(cinfo);
2018 if (progressive) {
2019 cinfo->buffered_image = TRUE;
2020 cinfo->input_scan_number = minProgressivePass+1; // Java count from 0
2021 #define MAX_JAVA_INT 2147483647 // XXX Is this defined in JNI somewhere?
2022 if (maxProgressivePass < MAX_JAVA_INT) {
2023 maxProgressivePass++; // For testing
2024 }
2025 }
2026
2027 data->streamBuf.suspendable = FALSE;
2028
2029 jpeg_start_decompress(cinfo);
2030
2031 if (numBands != cinfo->output_components) {
2032 RELEASE_ARRAYS(env, data, src->next_input_byte);
2033 JNU_ThrowByName(env, "javax/imageio/IIOException",
2034 "Invalid argument to native readImage");
2035 return data->abortFlag;
2036 }
2037
2038 if (cinfo->output_components <= 0 ||
2039 cinfo->image_width > (0xffffffffu / (unsigned int)cinfo->output_components))
2040 {
2041 RELEASE_ARRAYS(env, data, src->next_input_byte);
2042 JNU_ThrowByName(env, "javax/imageio/IIOException",
2043 "Invalid number of output components");
2044 return data->abortFlag;
2045 }
2046
2047 // Allocate a 1-scanline buffer
2048 scanLinePtr = (JSAMPROW)malloc(cinfo->image_width*cinfo->output_components);
2049 if (scanLinePtr == NULL) {
2050 RELEASE_ARRAYS(env, data, src->next_input_byte);
2051 JNU_ThrowByName( env,
2052 "java/lang/OutOfMemoryError",
2053 "Reading JPEG Stream");
2054 return data->abortFlag;
2055 }
2056
2057 // loop over progressive passes
2058 done = FALSE;
2059 while (!done) {
2060 if (progressive) {
2061 // initialize the next pass. Note that this skips up to
2062 // the first interesting pass.
2063 jpeg_start_output(cinfo, cinfo->input_scan_number);
2064 if (wantUpdates) {
2065 RELEASE_ARRAYS(env, data, src->next_input_byte);
2066 (*env)->CallVoidMethod(env, this,
2067 JPEGImageReader_passStartedID,
2068 cinfo->input_scan_number-1);
2069 if ((*env)->ExceptionOccurred(env)
2070 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
2071 cinfo->err->error_exit((j_common_ptr) cinfo);
2072 }
2073 }
2074 } else if (wantUpdates) {
2075 RELEASE_ARRAYS(env, data, src->next_input_byte);
2076 (*env)->CallVoidMethod(env, this,
2077 JPEGImageReader_passStartedID,
2078 0);
2079 if ((*env)->ExceptionOccurred(env)
2080 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
2081 cinfo->err->error_exit((j_common_ptr) cinfo);
2082 }
2083 }
2084
2085 // Skip until the first interesting line
2086 while ((data->abortFlag == JNI_FALSE)
2087 && ((jint)cinfo->output_scanline < sourceYStart)) {
2088 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2089 }
2090
2091 scanlineLimit = sourceYStart+sourceHeight;
2092 pixelLimit = scanLinePtr
2093 +(sourceXStart+sourceWidth)*cinfo->output_components;
2094
2095 pixelStride = stepX*cinfo->output_components;
2096 targetLine = 0;
2097
2098 while ((data->abortFlag == JNI_FALSE)
2099 && ((jint)cinfo->output_scanline < scanlineLimit)) {
2100
2101 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2102
2103 // Now mangle it into our buffer
2104 out = data->pixelBuf.buf.bp;
2105
2106 if (orderedBands && (pixelStride == numBands)) {
2107 // Optimization: The component bands are ordered sequentially,
2108 // so we can simply use memcpy() to copy the intermediate
2109 // scanline buffer into the raster.
2110 in = scanLinePtr + (sourceXStart * cinfo->output_components);
2111 if (pixelLimit > in) {
2112 numBytes = pixelLimit - in;
2113 if (numBytes > data->pixelBuf.byteBufferLength) {
2114 numBytes = data->pixelBuf.byteBufferLength;
2115 }
2116 memcpy(out, in, numBytes);
2117 }
2118 } else {
2119 numBytes = numBands;
2120 for (in = scanLinePtr+sourceXStart*cinfo->output_components;
2121 in < pixelLimit &&
2122 numBytes <= data->pixelBuf.byteBufferLength;
2123 in += pixelStride) {
2124 for (i = 0; i < numBands; i++) {
2125 *out++ = *(in+bands[i]);
2126 }
2127 numBytes += numBands;
2128 }
2129 }
2130
2131 // And call it back to Java
2132 RELEASE_ARRAYS(env, data, src->next_input_byte);
2133 (*env)->CallVoidMethod(env,
2134 this,
2135 JPEGImageReader_acceptPixelsID,
2136 targetLine++,
2137 progressive);
2138
2139 if ((*env)->ExceptionOccurred(env)
2140 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
2141 cinfo->err->error_exit((j_common_ptr) cinfo);
2142 }
2143
2144 // And skip over uninteresting lines to the next subsampled line
2145 // Ensure we don't go past the end of the image
2146
2147 // Lines to skip based on subsampling
2148 skipLines = stepY - 1;
2149 // Lines left in the image
2150 linesLeft = scanlineLimit - cinfo->output_scanline;
2151 // Take the minimum
2152 if (skipLines > linesLeft) {
2153 skipLines = linesLeft;
2154 }
2155 for(i = 0; i < skipLines; i++) {
2156 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2157 }
2158 }
2159 if (progressive) {
2160 jpeg_finish_output(cinfo); // Increments pass counter
2161 // Call Java to notify pass complete
2162 if (jpeg_input_complete(cinfo)
2163 || (cinfo->input_scan_number > maxProgressivePass)) {
2164 done = TRUE;
2165 }
2166 } else {
2167 done = TRUE;
2168 }
2169 if (wantUpdates) {
2170 RELEASE_ARRAYS(env, data, src->next_input_byte);
2171 (*env)->CallVoidMethod(env, this,
2172 JPEGImageReader_passCompleteID);
2173 if ((*env)->ExceptionOccurred(env)
2174 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
2175 cinfo->err->error_exit((j_common_ptr) cinfo);
2176 }
2177 }
2178
2179 }
2180 /*
2181 * We are done, but we might not have read all the lines, or all
2182 * the passes, so use jpeg_abort instead of jpeg_finish_decompress.
2183 */
2184 if (cinfo->output_scanline == cinfo->output_height) {
2185 // if ((cinfo->output_scanline == cinfo->output_height) &&
2186 //(jpeg_input_complete(cinfo))) { // We read the whole file
2187 jpeg_finish_decompress(cinfo);
2188 } else {
2189 jpeg_abort_decompress(cinfo);
2190 }
2191
2192 free(scanLinePtr);
2193
2194 RELEASE_ARRAYS(env, data, src->next_input_byte);
2195
2196 return data->abortFlag;
2197 }
2198
2199 JNIEXPORT void JNICALL
2200 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_clearNativeReadAbortFlag
2201 (JNIEnv *env,
2202 jobject this,
2203 jlong ptr) {
2204
2205 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2206
2207 if (data == NULL) {
2208 JNU_ThrowByName(env,
2209 "java/lang/IllegalStateException",
2210 "Attempting to use reader after dispose()");
2211 return;
2212 }
2213
2214 data->abortFlag = JNI_FALSE;
2215
2216 }
2217
2218 JNIEXPORT void JNICALL
2219 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_abortRead
2220 (JNIEnv *env,
2221 jobject this,
2222 jlong ptr) {
2223
2224 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2225
2226 if (data == NULL) {
2227 JNU_ThrowByName(env,
2228 "java/lang/IllegalStateException",
2229 "Attempting to use reader after dispose()");
2230 return;
2231 }
2232
2233 imageio_abort(env, this, data);
2234
2235 }
2236
2237 JNIEXPORT void JNICALL
2238 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetLibraryState
2239 (JNIEnv *env,
2240 jobject this,
2241 jlong ptr) {
2242 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2243 j_decompress_ptr cinfo;
2244
2245 if (data == NULL) {
2246 JNU_ThrowByName(env,
2247 "java/lang/IllegalStateException",
2248 "Attempting to use reader after dispose()");
2249 return;
2250 }
2251
2252 cinfo = (j_decompress_ptr) data->jpegObj;
2253
2254 jpeg_abort_decompress(cinfo);
2255 }
2256
2257
2258 JNIEXPORT void JNICALL
2259 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetReader
2260 (JNIEnv *env,
2261 jobject this,
2262 jlong ptr) {
2263
2264 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2265 j_decompress_ptr cinfo;
2266 sun_jpeg_error_ptr jerr;
2267
2268 if (data == NULL) {
2269 JNU_ThrowByName(env,
2270 "java/lang/IllegalStateException",
2271 "Attempting to use reader after dispose()");
2272 return;
2273 }
2274
2275 cinfo = (j_decompress_ptr) data->jpegObj;
2276
2277 jerr = (sun_jpeg_error_ptr) cinfo->err;
2278
2279 imageio_reset(env, (j_common_ptr) cinfo, data);
2280
2281 /*
2282 * The tables have not been reset, and there is no way to do so
2283 * in IJG without leaking memory. The only situation in which
2284 * this will cause a problem is if an image-only stream is read
2285 * with this object without initializing the correct tables first.
2286 * This situation, which should cause an error, might work but
2287 * produce garbage instead. If the huffman tables are wrong,
2288 * it will fail during the decode. If the q tables are wrong, it
2289 * will look strange. This is very unlikely, so don't worry about
2290 * it. To be really robust, we would keep a flag for table state
2291 * and consult it to catch exceptional situations.
2292 */
2293
2294 /* above does not clean up the source, so we have to */
2295
2296 /*
2297 We need to explicitly initialize exception handler or we may
2298 longjump to random address from the term_source()
2299 */
2300
2301 if (setjmp(jerr->setjmp_buffer)) {
2302
2303 /*
2304 We may get IOException from pushBack() here.
2305
2306 However it could be legal if original input stream was closed
2307 earlier (for example because network connection was closed).
2308 Unfortunately, image inputstream API has no way to check whether
2309 stream is already closed or IOException was thrown because of some
2310 other IO problem,
2311 And we can not avoid call to pushBack() on closed stream for the
2312 same reason.
2313
2314 So, for now we will silently eat this exception.
2315
2316 NB: this may be changed in future when ImageInputStream API will
2317 become more flexible.
2318 */
2319
2320 if ((*env)->ExceptionOccurred(env)) {
2321 (*env)->ExceptionClear(env);
2322 }
2323 } else {
2324 cinfo->src->term_source(cinfo);
2325 }
2326
2327 cinfo->src->bytes_in_buffer = 0;
2328 cinfo->src->next_input_byte = NULL;
2329 }
2330
2331 JNIEXPORT void JNICALL
2332 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_disposeReader
2333 (JNIEnv *env,
2334 jclass reader,
2335 jlong ptr) {
2336
2337 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2338 j_common_ptr info = destroyImageioData(env, data);
2339
2340 imageio_dispose(info);
2341 }
2342
2343 /********************** end of Reader *************************/
2344
2345 /********************** Writer Support ************************/
2346
2347 /********************** Destination Manager *******************/
2348
2349 METHODDEF(void)
2350 /*
2351 * Initialize destination --- called by jpeg_start_compress
2352 * before any data is actually written. The data arrays
2353 * must be pinned before this is called.
2354 */
2355 imageio_init_destination (j_compress_ptr cinfo)
2356 {
2357 struct jpeg_destination_mgr *dest = cinfo->dest;
2358 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2359 streamBufferPtr sb = &data->streamBuf;
2360 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2361
2362 if (sb->buf == NULL) {
2363 // We forgot to pin the array
2364 (*env)->FatalError(env, "Output buffer not pinned!");
2365 }
2366
2367 dest->next_output_byte = sb->buf;
2368 dest->free_in_buffer = sb->bufferLength;
2369 }
2370
2371 /*
2372 * Empty the output buffer --- called whenever buffer fills up.
2373 *
2374 * This routine writes the entire output buffer
2375 * (ignoring the current state of next_output_byte & free_in_buffer),
2376 * resets the pointer & count to the start of the buffer, and returns TRUE
2377 * indicating that the buffer has been dumped.
2378 */
2379
2380 METHODDEF(boolean)
2381 imageio_empty_output_buffer (j_compress_ptr cinfo)
2382 {
2383 struct jpeg_destination_mgr *dest = cinfo->dest;
2384 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2385 streamBufferPtr sb = &data->streamBuf;
2386 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2387 jobject output = NULL;
2388
2389 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2390
2391 GET_IO_REF(output);
2392
2393 (*env)->CallVoidMethod(env,
2394 output,
2395 JPEGImageWriter_writeOutputDataID,
2396 sb->hstreamBuffer,
2397 0,
2398 sb->bufferLength);
2399 if ((*env)->ExceptionOccurred(env)
2400 || !GET_ARRAYS(env, data,
2401 (const JOCTET **)(&dest->next_output_byte))) {
2402 cinfo->err->error_exit((j_common_ptr) cinfo);
2403 }
2404
2405 dest->next_output_byte = sb->buf;
2406 dest->free_in_buffer = sb->bufferLength;
2407
2408 return TRUE;
2409 }
2410
2411 /*
2412 * After all of the data has been encoded there may still be some
2413 * more left over in some of the working buffers. Now is the
2414 * time to clear them out.
2415 */
2416 METHODDEF(void)
2417 imageio_term_destination (j_compress_ptr cinfo)
2418 {
2419 struct jpeg_destination_mgr *dest = cinfo->dest;
2420 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2421 streamBufferPtr sb = &data->streamBuf;
2422 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2423
2424 /* find out how much needs to be written */
2425 /* this conversion from size_t to jint is safe, because the lenght of the buffer is limited by jint */
2426 jint datacount = (jint)(sb->bufferLength - dest->free_in_buffer);
2427
2428 if (datacount != 0) {
2429 jobject output = NULL;
2430
2431 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2432
2433 GET_IO_REF(output);
2434
2435 (*env)->CallVoidMethod(env,
2436 output,
2437 JPEGImageWriter_writeOutputDataID,
2438 sb->hstreamBuffer,
2439 0,
2440 datacount);
2441
2442 if ((*env)->ExceptionOccurred(env)
2443 || !GET_ARRAYS(env, data,
2444 (const JOCTET **)(&dest->next_output_byte))) {
2445 cinfo->err->error_exit((j_common_ptr) cinfo);
2446 }
2447 }
2448
2449 dest->next_output_byte = NULL;
2450 dest->free_in_buffer = 0;
2451
2452 }
2453
2454 /*
2455 * Flush the destination buffer. This is not called by the library,
2456 * but by our code below. This is the simplest implementation, though
2457 * certainly not the most efficient.
2458 */
2459 METHODDEF(void)
2460 imageio_flush_destination(j_compress_ptr cinfo)
2461 {
2462 imageio_term_destination(cinfo);
2463 imageio_init_destination(cinfo);
2464 }
2465
2466 /********************** end of destination manager ************/
2467
2468 /********************** Writer JNI calls **********************/
2469
2470
2471 JNIEXPORT void JNICALL
2472 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initWriterIDs
2473 (JNIEnv *env,
2474 jclass cls,
2475 jclass qTableClass,
2476 jclass huffClass) {
2477
2478 CHECK_NULL(JPEGImageWriter_writeOutputDataID = (*env)->GetMethodID(env,
2479 cls,
2480 "writeOutputData",
2481 "([BII)V"));
2482 CHECK_NULL(JPEGImageWriter_warningOccurredID = (*env)->GetMethodID(env,
2483 cls,
2484 "warningOccurred",
2485 "(I)V"));
2486 CHECK_NULL(JPEGImageWriter_warningWithMessageID =
2487 (*env)->GetMethodID(env,
2488 cls,
2489 "warningWithMessage",
2490 "(Ljava/lang/String;)V"));
2491 CHECK_NULL(JPEGImageWriter_writeMetadataID = (*env)->GetMethodID(env,
2492 cls,
2493 "writeMetadata",
2494 "()V"));
2495 CHECK_NULL(JPEGImageWriter_grabPixelsID = (*env)->GetMethodID(env,
2496 cls,
2497 "grabPixels",
2498 "(I)V"));
2499 CHECK_NULL(JPEGQTable_tableID = (*env)->GetFieldID(env,
2500 qTableClass,
2501 "qTable",
2502 "[I"));
2503 CHECK_NULL(JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env,
2504 huffClass,
2505 "lengths",
2506 "[S"));
2507 CHECK_NULL(JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env,
2508 huffClass,
2509 "values",
2510 "[S"));
2511 }
2512
2513 JNIEXPORT jlong JNICALL
2514 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter
2515 (JNIEnv *env,
2516 jobject this) {
2517
2518 imageIODataPtr ret;
2519 struct sun_jpeg_error_mgr *jerr;
2520 struct jpeg_destination_mgr *dest;
2521
2522 /* This struct contains the JPEG compression parameters and pointers to
2523 * working space (which is allocated as needed by the JPEG library).
2524 */
2525 struct jpeg_compress_struct *cinfo =
2526 malloc(sizeof(struct jpeg_compress_struct));
2527 if (cinfo == NULL) {
2528 JNU_ThrowByName( env,
2529 "java/lang/OutOfMemoryError",
2530 "Initializing Writer");
2531 return 0;
2532 }
2533
2534 /* We use our private extension JPEG error handler.
2535 */
2536 jerr = malloc (sizeof(struct sun_jpeg_error_mgr));
2537 if (jerr == NULL) {
2538 JNU_ThrowByName( env,
2539 "java/lang/OutOfMemoryError",
2540 "Initializing Writer");
2541 free(cinfo);
2542 return 0;
2543 }
2544
2545 /* We set up the normal JPEG error routines, then override error_exit. */
2546 cinfo->err = jpeg_std_error(&(jerr->pub));
2547 jerr->pub.error_exit = sun_jpeg_error_exit;
2548 /* We need to setup our own print routines */
2549 jerr->pub.output_message = sun_jpeg_output_message;
2550 /* Now we can setjmp before every call to the library */
2551
2552 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2553 if (setjmp(jerr->setjmp_buffer)) {
2554 /* If we get here, the JPEG code has signaled an error. */
2555 char buffer[JMSG_LENGTH_MAX];
2556 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
2557 buffer);
2558 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2559 return 0;
2560 }
2561
2562 /* Perform library initialization */
2563 jpeg_create_compress(cinfo);
2564
2565 /* Now set up the destination */
2566 dest = malloc(sizeof(struct jpeg_destination_mgr));
2567 if (dest == NULL) {
2568 JNU_ThrowByName( env,
2569 "java/lang/OutOfMemoryError",
2570 "Initializing Writer");
2571 imageio_dispose((j_common_ptr)cinfo);
2572 return 0;
2573 }
2574
2575 dest->init_destination = imageio_init_destination;
2576 dest->empty_output_buffer = imageio_empty_output_buffer;
2577 dest->term_destination = imageio_term_destination;
2578 dest->next_output_byte = NULL;
2579 dest->free_in_buffer = 0;
2580
2581 cinfo->dest = dest;
2582
2583 /* set up the association to persist for future calls */
2584 ret = initImageioData(env, (j_common_ptr) cinfo, this);
2585 if (ret == NULL) {
2586 (*env)->ExceptionClear(env);
2587 JNU_ThrowByName( env,
2588 "java/lang/OutOfMemoryError",
2589 "Initializing Writer");
2590 imageio_dispose((j_common_ptr)cinfo);
2591 return 0;
2592 }
2593 return ptr_to_jlong(ret);
2594 }
2595
2596 JNIEXPORT void JNICALL
2597 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_setDest
2598 (JNIEnv *env,
2599 jobject this,
2600 jlong ptr) {
2601
2602 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2603 j_compress_ptr cinfo;
2604
2605 if (data == NULL) {
2606 JNU_ThrowByName(env,
2607 "java/lang/IllegalStateException",
2608 "Attempting to use writer after dispose()");
2609 return;
2610 }
2611
2612 cinfo = (j_compress_ptr) data->jpegObj;
2613
2614 imageio_set_stream(env, data->jpegObj, data, this);
2615
2616
2617 // Don't call the init method, as that depends on pinned arrays
2618 cinfo->dest->next_output_byte = NULL;
2619 cinfo->dest->free_in_buffer = 0;
2620 }
2621
2622 JNIEXPORT void JNICALL
2623 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeTables
2624 (JNIEnv *env,
2625 jobject this,
2626 jlong ptr,
2627 jobjectArray qtables,
2628 jobjectArray DCHuffmanTables,
2629 jobjectArray ACHuffmanTables) {
2630
2631 struct jpeg_destination_mgr *dest;
2632 sun_jpeg_error_ptr jerr;
2633 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2634 j_compress_ptr cinfo;
2635
2636 if (data == NULL) {
2637 JNU_ThrowByName(env,
2638 "java/lang/IllegalStateException",
2639 "Attempting to use writer after dispose()");
2640 return;
2641 }
2642
2643 cinfo = (j_compress_ptr) data->jpegObj;
2644 dest = cinfo->dest;
2645
2646 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2647 jerr = (sun_jpeg_error_ptr) cinfo->err;
2648
2649 if (setjmp(jerr->setjmp_buffer)) {
2650 /* If we get here, the JPEG code has signaled an error
2651 while writing. */
2652 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2653 if (!(*env)->ExceptionOccurred(env)) {
2654 char buffer[JMSG_LENGTH_MAX];
2655 (*cinfo->err->format_message) ((j_common_ptr) cinfo,
2656 buffer);
2657 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2658 }
2659 return;
2660 }
2661
2662 if (GET_ARRAYS(env, data,
2663 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) {
2664 (*env)->ExceptionClear(env);
2665 JNU_ThrowByName(env,
2666 "javax/imageio/IIOException",
2667 "Array pin failed");
2668 return;
2669 }
2670
2671 jpeg_suppress_tables(cinfo, TRUE); // Suppress writing of any current
2672
2673 data->streamBuf.suspendable = FALSE;
2674 if (qtables != NULL) {
2675 #ifdef DEBUG_IIO_JPEG
2676 printf("in writeTables: qtables not NULL\n");
2677 #endif
2678 setQTables(env, (j_common_ptr) cinfo, qtables, TRUE);
2679 }
2680
2681 if (DCHuffmanTables != NULL) {
2682 setHTables(env, (j_common_ptr) cinfo,
2683 DCHuffmanTables, ACHuffmanTables, TRUE);
2684 }
2685
2686 jpeg_write_tables(cinfo); // Flushes the buffer for you
2687 RELEASE_ARRAYS(env, data, NULL);
2688 }
2689
2690 static void freeArray(UINT8** arr, jint size) {
2691 int i;
2692 if (arr != NULL) {
2693 for (i = 0; i < size; i++) {
2694 if (arr[i] != NULL) {
2695 free(arr[i]);
2696 }
2697 }
2698 free(arr);
2699 }
2700 }
2701
2702 JNIEXPORT jboolean JNICALL
2703 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeImage
2704 (JNIEnv *env,
2705 jobject this,
2706 jlong ptr,
2707 jbyteArray buffer,
2708 jint inCs, jint outCs,
2709 jint numBands,
2710 jintArray bandSizes,
2711 jint srcWidth,
2712 jint destWidth, jint destHeight,
2713 jint stepX, jint stepY,
2714 jobjectArray qtables,
2715 jboolean writeDQT,
2716 jobjectArray DCHuffmanTables,
2717 jobjectArray ACHuffmanTables,
2718 jboolean writeDHT,
2719 jboolean optimize,
2720 jboolean progressive,
2721 jint numScans,
2722 jintArray scanInfo,
2723 jintArray componentIds,
2724 jintArray HsamplingFactors,
2725 jintArray VsamplingFactors,
2726 jintArray QtableSelectors,
2727 jboolean haveMetadata,
2728 jint restartInterval) {
2729
2730 struct jpeg_destination_mgr *dest;
2731 JSAMPROW scanLinePtr;
2732 int i, j;
2733 int pixelStride;
2734 unsigned char *in, *out, *pixelLimit, *scanLineLimit;
2735 unsigned int scanLineSize, pixelBufferSize;
2736 int targetLine;
2737 pixelBufferPtr pb;
2738 sun_jpeg_error_ptr jerr;
2739 jint *ids, *hfactors, *vfactors, *qsels;
2740 jsize qlen, hlen;
2741 int *scanptr;
2742 jint *scanData;
2743 jint *bandSize;
2744 int maxBandValue, halfMaxBandValue;
2745 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2746 j_compress_ptr cinfo;
2747 UINT8** scale = NULL;
2748 boolean success = TRUE;
2749
2750
2751 /* verify the inputs */
2752
2753 if (data == NULL) {
2754 JNU_ThrowByName(env,
2755 "java/lang/IllegalStateException",
2756 "Attempting to use writer after dispose()");
2757 return JNI_FALSE;
2758 }
2759
2760 if ((buffer == NULL) ||
2761 (qtables == NULL) ||
2762 // H tables can be null if optimizing
2763 (componentIds == NULL) ||
2764 (HsamplingFactors == NULL) || (VsamplingFactors == NULL) ||
2765 (QtableSelectors == NULL) ||
2766 ((numScans != 0) && (scanInfo != NULL))) {
2767
2768 JNU_ThrowNullPointerException(env, 0);
2769 return JNI_FALSE;
2770
2771 }
2772
2773 scanLineSize = destWidth * numBands;
2774 if ((inCs < 0) || (inCs > JCS_YCCK) ||
2775 (outCs < 0) || (outCs > JCS_YCCK) ||
2776 (numBands < 1) || (numBands > MAX_BANDS) ||
2777 (srcWidth < 0) ||
2778 (destWidth < 0) || (destWidth > srcWidth) ||
2779 (destHeight < 0) ||
2780 (stepX < 0) || (stepY < 0) ||
2781 ((INT_MAX / numBands) < destWidth)) /* destWidth causes an integer overflow */
2782 {
2783 JNU_ThrowByName(env, "javax/imageio/IIOException",
2784 "Invalid argument to native writeImage");
2785 return JNI_FALSE;
2786 }
2787
2788 if (stepX > srcWidth) {
2789 stepX = srcWidth;
2790 }
2791
2792 bandSize = (*env)->GetIntArrayElements(env, bandSizes, NULL);
2793 CHECK_NULL_RETURN(bandSize, JNI_FALSE);
2794
2795 for (i = 0; i < numBands; i++) {
2796 if (bandSize[i] <= 0 || bandSize[i] > JPEG_BAND_SIZE) {
2797 (*env)->ReleaseIntArrayElements(env, bandSizes,
2798 bandSize, JNI_ABORT);
2799 JNU_ThrowByName(env, "javax/imageio/IIOException", "Invalid Image");
2800 return JNI_FALSE;
2801 }
2802 }
2803
2804 for (i = 0; i < numBands; i++) {
2805 if (bandSize[i] != JPEG_BAND_SIZE) {
2806 if (scale == NULL) {
2807 scale = (UINT8**) calloc(numBands, sizeof(UINT8*));
2808
2809 if (scale == NULL) {
2810 (*env)->ReleaseIntArrayElements(env, bandSizes,
2811 bandSize, JNI_ABORT);
2812 JNU_ThrowByName( env, "java/lang/OutOfMemoryError",
2813 "Writing JPEG Stream");
2814 return JNI_FALSE;
2815 }
2816 }
2817
2818 maxBandValue = (1 << bandSize[i]) - 1;
2819
2820 scale[i] = (UINT8*) malloc((maxBandValue + 1) * sizeof(UINT8));
2821
2822 if (scale[i] == NULL) {
2823 // Cleanup before throwing an out of memory exception
2824 for (j = 0; j < i; j++) {
2825 free(scale[j]);
2826 }
2827 free(scale);
2828 (*env)->ReleaseIntArrayElements(env, bandSizes,
2829 bandSize, JNI_ABORT);
2830 JNU_ThrowByName( env, "java/lang/OutOfMemoryError",
2831 "Writing JPEG Stream");
2832 return JNI_FALSE;
2833 }
2834
2835 halfMaxBandValue = maxBandValue >> 1;
2836
2837 for (j = 0; j <= maxBandValue; j++) {
2838 scale[i][j] = (UINT8)
2839 ((j*MAX_JPEG_BAND_VALUE + halfMaxBandValue)/maxBandValue);
2840 }
2841 }
2842 }
2843
2844 (*env)->ReleaseIntArrayElements(env, bandSizes,
2845 bandSize, JNI_ABORT);
2846
2847 cinfo = (j_compress_ptr) data->jpegObj;
2848 dest = cinfo->dest;
2849
2850 /* Set the buffer as our PixelBuffer */
2851 pb = &data->pixelBuf;
2852
2853 if (setPixelBuffer(env, pb, buffer) == NOT_OK) {
2854 freeArray(scale, numBands);
2855 return data->abortFlag; // We already threw an out of memory exception
2856 }
2857
2858 // Allocate a 1-scanline buffer
2859 scanLinePtr = (JSAMPROW)malloc(scanLineSize);
2860 if (scanLinePtr == NULL) {
2861 freeArray(scale, numBands);
2862 JNU_ThrowByName( env,
2863 "java/lang/OutOfMemoryError",
2864 "Writing JPEG Stream");
2865 return data->abortFlag;
2866 }
2867 scanLineLimit = scanLinePtr + scanLineSize;
2868
2869 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2870 jerr = (sun_jpeg_error_ptr) cinfo->err;
2871
2872 if (setjmp(jerr->setjmp_buffer)) {
2873 /* If we get here, the JPEG code has signaled an error
2874 while writing. */
2875 if (!(*env)->ExceptionOccurred(env)) {
2876 char buffer[JMSG_LENGTH_MAX];
2877 (*cinfo->err->format_message) ((j_common_ptr) cinfo,
2878 buffer);
2879 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2880 }
2881
2882 freeArray(scale, numBands);
2883 free(scanLinePtr);
2884 return data->abortFlag;
2885 }
2886
2887 // set up parameters
2888 cinfo->image_width = destWidth;
2889 cinfo->image_height = destHeight;
2890 cinfo->input_components = numBands;
2891 cinfo->in_color_space = inCs;
2892
2893 jpeg_set_defaults(cinfo);
2894
2895 jpeg_set_colorspace(cinfo, outCs);
2896
2897 cinfo->optimize_coding = optimize;
2898
2899 cinfo->write_JFIF_header = FALSE;
2900 cinfo->write_Adobe_marker = FALSE;
2901 // copy componentIds
2902 ids = (*env)->GetIntArrayElements(env, componentIds, NULL);
2903 hfactors = (*env)->GetIntArrayElements(env, HsamplingFactors, NULL);
2904 vfactors = (*env)->GetIntArrayElements(env, VsamplingFactors, NULL);
2905 qsels = (*env)->GetIntArrayElements(env, QtableSelectors, NULL);
2906
2907 if (ids && hfactors && vfactors && qsels) {
2908 for (i = 0; i < numBands; i++) {
2909 cinfo->comp_info[i].component_id = ids[i];
2910 cinfo->comp_info[i].h_samp_factor = hfactors[i];
2911 cinfo->comp_info[i].v_samp_factor = vfactors[i];
2912 cinfo->comp_info[i].quant_tbl_no = qsels[i];
2913 }
2914 } else {
2915 success = FALSE;
2916 }
2917
2918 if (ids) {
2919 (*env)->ReleaseIntArrayElements(env, componentIds, ids, JNI_ABORT);
2920 }
2921 if (hfactors) {
2922 (*env)->ReleaseIntArrayElements(env, HsamplingFactors, hfactors, JNI_ABORT);
2923 }
2924 if (vfactors) {
2925 (*env)->ReleaseIntArrayElements(env, VsamplingFactors, vfactors, JNI_ABORT);
2926 }
2927 if (qsels) {
2928 (*env)->ReleaseIntArrayElements(env, QtableSelectors, qsels, JNI_ABORT);
2929 }
2930 if (!success) {
2931 freeArray(scale, numBands);
2932 free(scanLinePtr);
2933 return data->abortFlag;
2934 }
2935
2936 jpeg_suppress_tables(cinfo, TRUE); // Disable writing any current
2937
2938 qlen = setQTables(env, (j_common_ptr) cinfo, qtables, writeDQT);
2939
2940 if (!optimize) {
2941 // Set the h tables
2942 hlen = setHTables(env,
2943 (j_common_ptr) cinfo,
2944 DCHuffmanTables,
2945 ACHuffmanTables,
2946 writeDHT);
2947 }
2948
2949 if (GET_ARRAYS(env, data,
2950 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) {
2951 (*env)->ExceptionClear(env);
2952 freeArray(scale, numBands);
2953 free(scanLinePtr);
2954 JNU_ThrowByName(env,
2955 "javax/imageio/IIOException",
2956 "Array pin failed");
2957 return data->abortFlag;
2958 }
2959
2960 data->streamBuf.suspendable = FALSE;
2961
2962 if (progressive) {
2963 if (numScans == 0) { // then use default scans
2964 jpeg_simple_progression(cinfo);
2965 } else {
2966 cinfo->num_scans = numScans;
2967 // Copy the scanInfo to a local array
2968 // The following is copied from jpeg_simple_progression:
2969 /* Allocate space for script.
2970 * We need to put it in the permanent pool in case the application performs
2971 * multiple compressions without changing the settings. To avoid a memory
2972 * leak if jpeg_simple_progression is called repeatedly for the same JPEG
2973 * object, we try to re-use previously allocated space, and we allocate
2974 * enough space to handle YCbCr even if initially asked for grayscale.
2975 */
2976 if (cinfo->script_space == NULL
2977 || cinfo->script_space_size < numScans) {
2978 cinfo->script_space_size = MAX(numScans, 10);
2979 cinfo->script_space = (jpeg_scan_info *)
2980 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo,
2981 JPOOL_PERMANENT,
2982 cinfo->script_space_size
2983 * sizeof(jpeg_scan_info));
2984 }
2985 cinfo->scan_info = cinfo->script_space;
2986 scanptr = (int *) cinfo->script_space;
2987 scanData = (*env)->GetIntArrayElements(env, scanInfo, NULL);
2988 if (scanData == NULL) {
2989 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2990 freeArray(scale, numBands);
2991 free(scanLinePtr);
2992 return data->abortFlag;
2993 }
2994 // number of jints per scan is 9
2995 // We avoid a memcpy to handle different size ints
2996 for (i = 0; i < numScans*9; i++) {
2997 scanptr[i] = scanData[i];
2998 }
2999 (*env)->ReleaseIntArrayElements(env, scanInfo,
3000 scanData, JNI_ABORT);
3001
3002 }
3003 }
3004
3005 cinfo->restart_interval = restartInterval;
3006
3007 #ifdef DEBUG_IIO_JPEG
3008 printf("writer setup complete, starting compressor\n");
3009 #endif
3010
3011 // start the compressor; tables must already be set
3012 jpeg_start_compress(cinfo, FALSE); // Leaves sent_table alone
3013
3014 if (haveMetadata) {
3015 // Flush the buffer
3016 imageio_flush_destination(cinfo);
3017 // Call Java to write the metadata
3018 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
3019 (*env)->CallVoidMethod(env,
3020 this,
3021 JPEGImageWriter_writeMetadataID);
3022 if ((*env)->ExceptionOccurred(env)
3023 || !GET_ARRAYS(env, data,
3024 (const JOCTET **)(&dest->next_output_byte))) {
3025 cinfo->err->error_exit((j_common_ptr) cinfo);
3026 }
3027 }
3028
3029 targetLine = 0;
3030 pixelBufferSize = srcWidth * numBands;
3031 pixelStride = numBands * stepX;
3032
3033 // for each line in destHeight
3034 while ((data->abortFlag == JNI_FALSE)
3035 && (cinfo->next_scanline < cinfo->image_height)) {
3036 // get the line from Java
3037 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
3038 (*env)->CallVoidMethod(env,
3039 this,
3040 JPEGImageWriter_grabPixelsID,
3041 targetLine);
3042 if ((*env)->ExceptionOccurred(env)
3043 || !GET_ARRAYS(env, data,
3044 (const JOCTET **)(&dest->next_output_byte))) {
3045 cinfo->err->error_exit((j_common_ptr) cinfo);
3046 }
3047
3048 // subsample it into our buffer
3049
3050 in = data->pixelBuf.buf.bp;
3051 out = scanLinePtr;
3052 pixelLimit = in + ((pixelBufferSize > data->pixelBuf.byteBufferLength) ?
3053 data->pixelBuf.byteBufferLength : pixelBufferSize);
3054 for (; (in < pixelLimit) && (out < scanLineLimit); in += pixelStride) {
3055 for (i = 0; i < numBands; i++) {
3056 if (scale !=NULL && scale[i] != NULL) {
3057 *out++ = scale[i][*(in+i)];
3058 #ifdef DEBUG_IIO_JPEG
3059 if (in == data->pixelBuf.buf.bp){ // Just the first pixel
3060 printf("in %d -> out %d, ", *(in+i), *(out-i-1));
3061 }
3062 #endif
3063
3064 #ifdef DEBUG_IIO_JPEG
3065 if (in == data->pixelBuf.buf.bp){ // Just the first pixel
3066 printf("\n");
3067 }
3068 #endif
3069 } else {
3070 *out++ = *(in+i);
3071 }
3072 }
3073 }
3074 // write it out
3075 jpeg_write_scanlines(cinfo, (JSAMPARRAY)&scanLinePtr, 1);
3076 targetLine += stepY;
3077 }
3078
3079 /*
3080 * We are done, but we might not have done all the lines,
3081 * so use jpeg_abort instead of jpeg_finish_compress.
3082 */
3083 if (cinfo->next_scanline == cinfo->image_height) {
3084 jpeg_finish_compress(cinfo); // Flushes buffer with term_dest
3085 } else {
3086 jpeg_abort((j_common_ptr)cinfo);
3087 }
3088
3089 freeArray(scale, numBands);
3090 free(scanLinePtr);
3091 RELEASE_ARRAYS(env, data, NULL);
3092 return data->abortFlag;
3093 }
3094
3095 JNIEXPORT void JNICALL
3096 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_abortWrite
3097 (JNIEnv *env,
3098 jobject this,
3099 jlong ptr) {
3100
3101 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3102
3103 if (data == NULL) {
3104 JNU_ThrowByName(env,
3105 "java/lang/IllegalStateException",
3106 "Attempting to use writer after dispose()");
3107 return;
3108 }
3109
3110 imageio_abort(env, this, data);
3111 }
3112
3113 JNIEXPORT void JNICALL
3114 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_resetWriter
3115 (JNIEnv *env,
3116 jobject this,
3117 jlong ptr) {
3118 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3119 j_compress_ptr cinfo;
3120
3121 if (data == NULL) {
3122 JNU_ThrowByName(env,
3123 "java/lang/IllegalStateException",
3124 "Attempting to use writer after dispose()");
3125 return;
3126 }
3127
3128 cinfo = (j_compress_ptr) data->jpegObj;
3129
3130 imageio_reset(env, (j_common_ptr) cinfo, data);
3131
3132 /*
3133 * The tables have not been reset, and there is no way to do so
3134 * in IJG without leaking memory. The only situation in which
3135 * this will cause a problem is if an image-only stream is written
3136 * with this object without initializing the correct tables first,
3137 * which should not be possible.
3138 */
3139
3140 cinfo->dest->next_output_byte = NULL;
3141 cinfo->dest->free_in_buffer = 0;
3142 }
3143
3144 JNIEXPORT void JNICALL
3145 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_disposeWriter
3146 (JNIEnv *env,
3147 jclass writer,
3148 jlong ptr) {
3149
3150 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3151 j_common_ptr info = destroyImageioData(env, data);
3152
3153 imageio_dispose(info);
3154 }