1 /*
2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /*
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 (*env)->CallVoidMethod(env, theObject,
573 JPEGImageReader_warningWithMessageID,
574 string);
575 } else {
576 (*env)->CallVoidMethod(env, theObject,
577 JPEGImageWriter_warningWithMessageID,
578 string);
579 }
580 }
581
582 /* End of verbatim copy from jpegdecoder.c */
583
584 /*************** end of error handling *********************/
585
586 /*************** Shared utility code ***********************/
587
588 static void imageio_set_stream(JNIEnv *env,
589 j_common_ptr cinfo,
590 imageIODataPtr data,
591 jobject io){
592 streamBufferPtr sb;
593 sun_jpeg_error_ptr jerr;
594
595 sb = &data->streamBuf;
596
597 resetStreamBuffer(env, sb); // Removes any old stream
598
599 /* Now we need a new weak global reference for the I/O provider */
600 if (io != NULL) { // Fix for 4411955
601 sb->ioRef = (*env)->NewWeakGlobalRef(env, io);
602 CHECK_NULL(sb->ioRef);
603 }
604
605 /* And finally reset state */
606 data->abortFlag = JNI_FALSE;
607
608 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
609 jerr = (sun_jpeg_error_ptr) cinfo->err;
610
611 if (setjmp(jerr->setjmp_buffer)) {
612 /* If we get here, the JPEG code has signaled an error
613 while aborting. */
614 if (!(*env)->ExceptionOccurred(env)) {
615 char buffer[JMSG_LENGTH_MAX];
616 (*cinfo->err->format_message) (cinfo,
617 buffer);
618 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
619 }
620 return;
621 }
622
623 jpeg_abort(cinfo); // Frees any markers, but not tables
624
625 }
626
627 static void imageio_reset(JNIEnv *env,
628 j_common_ptr cinfo,
629 imageIODataPtr data) {
630 sun_jpeg_error_ptr jerr;
631
632 resetImageIOData(env, data); // Mapping to jpeg object is retained.
633
634 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
635 jerr = (sun_jpeg_error_ptr) cinfo->err;
636
637 if (setjmp(jerr->setjmp_buffer)) {
638 /* If we get here, the JPEG code has signaled an error
639 while aborting. */
640 if (!(*env)->ExceptionOccurred(env)) {
641 char buffer[JMSG_LENGTH_MAX];
642 (*cinfo->err->format_message) (cinfo, buffer);
643 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
644 }
645 return;
646 }
647
648 jpeg_abort(cinfo); // Does not reset tables
649
650 }
651
652 static void imageio_dispose(j_common_ptr info) {
653
654 if (info != NULL) {
655 free(info->err);
656 info->err = NULL;
657 if (info->is_decompressor) {
658 j_decompress_ptr dinfo = (j_decompress_ptr) info;
659 free(dinfo->src);
660 dinfo->src = NULL;
661 } else {
662 j_compress_ptr cinfo = (j_compress_ptr) info;
663 free(cinfo->dest);
664 cinfo->dest = NULL;
665 }
666 jpeg_destroy(info);
667 free(info);
668 }
669 }
670
671 static void imageio_abort(JNIEnv *env, jobject this,
672 imageIODataPtr data) {
673 data->abortFlag = JNI_TRUE;
674 }
675
676 static int setQTables(JNIEnv *env,
677 j_common_ptr cinfo,
678 jobjectArray qtables,
679 boolean write) {
680 jsize qlen;
681 jobject table;
682 jintArray qdata;
683 jint *qdataBody;
684 JQUANT_TBL *quant_ptr;
685 int i, j;
686 j_compress_ptr comp;
687 j_decompress_ptr decomp;
688
689 qlen = (*env)->GetArrayLength(env, qtables);
690 #ifdef DEBUG_IIO_JPEG
691 printf("in setQTables, qlen = %d, write is %d\n", qlen, write);
692 #endif
693 if (qlen > NUM_QUANT_TBLS) {
694 /* Ignore extra qunterization tables. */
695 qlen = NUM_QUANT_TBLS;
696 }
697 for (i = 0; i < qlen; i++) {
698 table = (*env)->GetObjectArrayElement(env, qtables, i);
699 CHECK_NULL_RETURN(table, 0);
700 qdata = (*env)->GetObjectField(env, table, JPEGQTable_tableID);
701 qdataBody = (*env)->GetPrimitiveArrayCritical(env, qdata, NULL);
702
703 if (cinfo->is_decompressor) {
704 decomp = (j_decompress_ptr) cinfo;
705 if (decomp->quant_tbl_ptrs[i] == NULL) {
706 decomp->quant_tbl_ptrs[i] =
707 jpeg_alloc_quant_table(cinfo);
708 }
709 quant_ptr = decomp->quant_tbl_ptrs[i];
710 } else {
711 comp = (j_compress_ptr) cinfo;
712 if (comp->quant_tbl_ptrs[i] == NULL) {
713 comp->quant_tbl_ptrs[i] =
714 jpeg_alloc_quant_table(cinfo);
715 }
716 quant_ptr = comp->quant_tbl_ptrs[i];
717 }
718
719 for (j = 0; j < 64; j++) {
720 quant_ptr->quantval[j] = (UINT16)qdataBody[j];
721 }
722 quant_ptr->sent_table = !write;
723 (*env)->ReleasePrimitiveArrayCritical(env,
724 qdata,
725 qdataBody,
726 0);
727 }
728 return qlen;
729 }
730
731 static boolean setHuffTable(JNIEnv *env,
732 JHUFF_TBL *huff_ptr,
733 jobject table) {
734
735 jshortArray huffLens;
736 jshortArray huffValues;
737 jshort *hlensBody, *hvalsBody;
738 jsize hlensLen, hvalsLen;
739 int i;
740
741 // lengths
742 huffLens = (*env)->GetObjectField(env,
743 table,
744 JPEGHuffmanTable_lengthsID);
745 hlensLen = (*env)->GetArrayLength(env, huffLens);
746 hlensBody = (*env)->GetShortArrayElements(env,
747 huffLens,
748 NULL);
749 CHECK_NULL_RETURN(hlensBody, FALSE);
750
751 if (hlensLen > 16) {
752 /* Ignore extra elements of bits array. Only 16 elements can be
753 stored. 0-th element is not used. (see jpeglib.h, line 107) */
754 hlensLen = 16;
755 }
756 for (i = 1; i <= hlensLen; i++) {
757 huff_ptr->bits[i] = (UINT8)hlensBody[i-1];
758 }
759 (*env)->ReleaseShortArrayElements(env,
760 huffLens,
761 hlensBody,
762 JNI_ABORT);
763 // values
764 huffValues = (*env)->GetObjectField(env,
765 table,
766 JPEGHuffmanTable_valuesID);
767 hvalsLen = (*env)->GetArrayLength(env, huffValues);
768 hvalsBody = (*env)->GetShortArrayElements(env,
769 huffValues,
770 NULL);
771 CHECK_NULL_RETURN(hvalsBody, FALSE);
772
773 if (hvalsLen > 256) {
774 /* Ignore extra elements of hufval array. Only 256 elements
775 can be stored. (see jpeglib.h, line 109) */
776 hlensLen = 256;
777 }
778 for (i = 0; i < hvalsLen; i++) {
779 huff_ptr->huffval[i] = (UINT8)hvalsBody[i];
780 }
781 (*env)->ReleaseShortArrayElements(env,
782 huffValues,
783 hvalsBody,
784 JNI_ABORT);
785 return TRUE;
786 }
787
788 static int setHTables(JNIEnv *env,
789 j_common_ptr cinfo,
790 jobjectArray DCHuffmanTables,
791 jobjectArray ACHuffmanTables,
792 boolean write) {
793 int i;
794 jobject table;
795 JHUFF_TBL *huff_ptr;
796 j_compress_ptr comp;
797 j_decompress_ptr decomp;
798 jsize hlen = (*env)->GetArrayLength(env, DCHuffmanTables);
799
800 if (hlen > NUM_HUFF_TBLS) {
801 /* Ignore extra DC huffman tables. */
802 hlen = NUM_HUFF_TBLS;
803 }
804 for (i = 0; i < hlen; i++) {
805 if (cinfo->is_decompressor) {
806 decomp = (j_decompress_ptr) cinfo;
807 if (decomp->dc_huff_tbl_ptrs[i] == NULL) {
808 decomp->dc_huff_tbl_ptrs[i] =
809 jpeg_alloc_huff_table(cinfo);
810 }
811 huff_ptr = decomp->dc_huff_tbl_ptrs[i];
812 } else {
813 comp = (j_compress_ptr) cinfo;
814 if (comp->dc_huff_tbl_ptrs[i] == NULL) {
815 comp->dc_huff_tbl_ptrs[i] =
816 jpeg_alloc_huff_table(cinfo);
817 }
818 huff_ptr = comp->dc_huff_tbl_ptrs[i];
819 }
820 table = (*env)->GetObjectArrayElement(env, DCHuffmanTables, i);
821 if (table == NULL || !setHuffTable(env, huff_ptr, table)) {
822 return 0;
823 }
824 huff_ptr->sent_table = !write;
825 }
826 hlen = (*env)->GetArrayLength(env, ACHuffmanTables);
827 if (hlen > NUM_HUFF_TBLS) {
828 /* Ignore extra AC huffman tables. */
829 hlen = NUM_HUFF_TBLS;
830 }
831 for (i = 0; i < hlen; i++) {
832 if (cinfo->is_decompressor) {
833 decomp = (j_decompress_ptr) cinfo;
834 if (decomp->ac_huff_tbl_ptrs[i] == NULL) {
835 decomp->ac_huff_tbl_ptrs[i] =
836 jpeg_alloc_huff_table(cinfo);
837 }
838 huff_ptr = decomp->ac_huff_tbl_ptrs[i];
839 } else {
840 comp = (j_compress_ptr) cinfo;
841 if (comp->ac_huff_tbl_ptrs[i] == NULL) {
842 comp->ac_huff_tbl_ptrs[i] =
843 jpeg_alloc_huff_table(cinfo);
844 }
845 huff_ptr = comp->ac_huff_tbl_ptrs[i];
846 }
847 table = (*env)->GetObjectArrayElement(env, ACHuffmanTables, i);
848 if(table == NULL || !setHuffTable(env, huff_ptr, table)) {
849 return 0;
850 }
851 huff_ptr->sent_table = !write;
852 }
853 return hlen;
854 }
855
856
857 /*************** end of shared utility code ****************/
858
859 /********************** Reader Support **************************/
860
861 /********************** Source Management ***********************/
862
863 /*
864 * INPUT HANDLING:
865 *
866 * The JPEG library's input management is defined by the jpeg_source_mgr
867 * structure which contains two fields to convey the information in the
868 * buffer and 5 methods which perform all buffer management. The library
869 * defines a standard input manager that uses stdio for obtaining compressed
870 * jpeg data, but here we need to use Java to get our data.
871 *
872 * We use the library jpeg_source_mgr but our own routines that access
873 * imageio-specific information in the imageIOData structure.
874 */
875
876 /*
877 * Initialize source. This is called by jpeg_read_header() before any
878 * data is actually read. Unlike init_destination(), it may leave
879 * bytes_in_buffer set to 0 (in which case a fill_input_buffer() call
880 * will occur immediately).
881 */
882
883 GLOBAL(void)
884 imageio_init_source(j_decompress_ptr cinfo)
885 {
886 struct jpeg_source_mgr *src = cinfo->src;
887 src->next_input_byte = NULL;
888 src->bytes_in_buffer = 0;
889 }
890
891 /*
892 * This is called whenever bytes_in_buffer has reached zero and more
893 * data is wanted. In typical applications, it should read fresh data
894 * into the buffer (ignoring the current state of next_input_byte and
895 * bytes_in_buffer), reset the pointer & count to the start of the
896 * buffer, and return TRUE indicating that the buffer has been reloaded.
897 * It is not necessary to fill the buffer entirely, only to obtain at
898 * least one more byte. bytes_in_buffer MUST be set to a positive value
899 * if TRUE is returned. A FALSE return should only be used when I/O
900 * suspension is desired (this mode is discussed in the next section).
901 */
902 /*
903 * Note that with I/O suspension turned on, this procedure should not
904 * do any work since the JPEG library has a very simple backtracking
905 * mechanism which relies on the fact that the buffer will be filled
906 * only when it has backed out to the top application level. When
907 * suspendable is turned on, imageio_fill_suspended_buffer will
908 * do the actual work of filling the buffer.
909 */
910
911 GLOBAL(boolean)
912 imageio_fill_input_buffer(j_decompress_ptr cinfo)
913 {
914 struct jpeg_source_mgr *src = cinfo->src;
915 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
916 streamBufferPtr sb = &data->streamBuf;
917 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
918 int ret;
919 jobject input = NULL;
920
921 /* This is where input suspends */
922 if (sb->suspendable) {
923 return FALSE;
924 }
925
926 #ifdef DEBUG_IIO_JPEG
927 printf("Filling input buffer, remaining skip is %ld, ",
928 sb->remaining_skip);
929 printf("Buffer length is %d\n", sb->bufferLength);
930 #endif
931
932 /*
933 * Definitively skips. Could be left over if we tried to skip
934 * more than a buffer's worth but suspended when getting the next
935 * buffer. Now we aren't suspended, so we can catch up.
936 */
937 if (sb->remaining_skip) {
938 src->skip_input_data(cinfo, 0);
939 }
940
941 /*
942 * Now fill a complete buffer, or as much of one as the stream
943 * will give us if we are near the end.
944 */
945 RELEASE_ARRAYS(env, data, src->next_input_byte);
946
947 GET_IO_REF(input);
948
949 ret = (*env)->CallIntMethod(env,
950 input,
951 JPEGImageReader_readInputDataID,
952 sb->hstreamBuffer, 0,
953 sb->bufferLength);
954 if ((ret > 0) && ((unsigned int)ret > sb->bufferLength)) {
955 ret = sb->bufferLength;
956 }
957 if ((*env)->ExceptionOccurred(env)
958 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
959 cinfo->err->error_exit((j_common_ptr) cinfo);
960 }
961
962 #ifdef DEBUG_IIO_JPEG
963 printf("Buffer filled. ret = %d\n", ret);
964 #endif
965 /*
966 * If we have reached the end of the stream, then the EOI marker
967 * is missing. We accept such streams but generate a warning.
968 * The image is likely to be corrupted, though everything through
969 * the end of the last complete MCU should be usable.
970 */
971 if (ret <= 0) {
972 jobject reader = data->imageIOobj;
973 #ifdef DEBUG_IIO_JPEG
974 printf("YO! Early EOI! ret = %d\n", ret);
975 #endif
976 RELEASE_ARRAYS(env, data, src->next_input_byte);
977 (*env)->CallVoidMethod(env, reader,
978 JPEGImageReader_warningOccurredID,
979 READ_NO_EOI);
980 if ((*env)->ExceptionOccurred(env)
981 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
982 cinfo->err->error_exit((j_common_ptr) cinfo);
983 }
984
985 sb->buf[0] = (JOCTET) 0xFF;
986 sb->buf[1] = (JOCTET) JPEG_EOI;
987 ret = 2;
988 }
989
990 src->next_input_byte = sb->buf;
991 src->bytes_in_buffer = ret;
992
993 return TRUE;
994 }
995
996 /*
997 * With I/O suspension turned on, the JPEG library requires that all
998 * buffer filling be done at the top application level, using this
999 * function. Due to the way that backtracking works, this procedure
1000 * saves all of the data that was left in the buffer when suspension
1001 * occurred and read new data only at the end.
1002 */
1003
1004 GLOBAL(void)
1005 imageio_fill_suspended_buffer(j_decompress_ptr cinfo)
1006 {
1007 struct jpeg_source_mgr *src = cinfo->src;
1008 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1009 streamBufferPtr sb = &data->streamBuf;
1010 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1011 jint ret;
1012 size_t offset, buflen;
1013 jobject input = NULL;
1014
1015 /*
1016 * The original (jpegdecoder.c) had code here that called
1017 * InputStream.available and just returned if the number of bytes
1018 * available was less than any remaining skip. Presumably this was
1019 * to avoid blocking, although the benefit was unclear, as no more
1020 * decompression can take place until more data is available, so
1021 * the code would block on input a little further along anyway.
1022 * ImageInputStreams don't have an available method, so we'll just
1023 * block in the skip if we have to.
1024 */
1025
1026 if (sb->remaining_skip) {
1027 src->skip_input_data(cinfo, 0);
1028 }
1029
1030 /* Save the data currently in the buffer */
1031 offset = src->bytes_in_buffer;
1032 if (src->next_input_byte > sb->buf) {
1033 memcpy(sb->buf, src->next_input_byte, offset);
1034 }
1035
1036
1037 RELEASE_ARRAYS(env, data, src->next_input_byte);
1038
1039 GET_IO_REF(input);
1040
1041 buflen = sb->bufferLength - offset;
1042 if (buflen <= 0) {
1043 if (!GET_ARRAYS(env, data, &(src->next_input_byte))) {
1044 cinfo->err->error_exit((j_common_ptr) cinfo);
1045 }
1046 return;
1047 }
1048
1049 ret = (*env)->CallIntMethod(env, input,
1050 JPEGImageReader_readInputDataID,
1051 sb->hstreamBuffer,
1052 offset, buflen);
1053 if ((ret > 0) && ((unsigned int)ret > buflen)) ret = buflen;
1054 if ((*env)->ExceptionOccurred(env)
1055 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1056 cinfo->err->error_exit((j_common_ptr) cinfo);
1057 }
1058 /*
1059 * If we have reached the end of the stream, then the EOI marker
1060 * is missing. We accept such streams but generate a warning.
1061 * The image is likely to be corrupted, though everything through
1062 * the end of the last complete MCU should be usable.
1063 */
1064 if (ret <= 0) {
1065 jobject reader = data->imageIOobj;
1066 RELEASE_ARRAYS(env, data, src->next_input_byte);
1067 (*env)->CallVoidMethod(env, reader,
1068 JPEGImageReader_warningOccurredID,
1069 READ_NO_EOI);
1070 if ((*env)->ExceptionOccurred(env)
1071 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1072 cinfo->err->error_exit((j_common_ptr) cinfo);
1073 }
1074
1075 sb->buf[offset] = (JOCTET) 0xFF;
1076 sb->buf[offset + 1] = (JOCTET) JPEG_EOI;
1077 ret = 2;
1078 }
1079
1080 src->next_input_byte = sb->buf;
1081 src->bytes_in_buffer = ret + offset;
1082
1083 return;
1084 }
1085
1086 /*
1087 * Skip num_bytes worth of data. The buffer pointer and count are
1088 * advanced over num_bytes input bytes, using the input stream
1089 * skipBytes method if the skip is greater than the number of bytes
1090 * in the buffer. This is used to skip over a potentially large amount of
1091 * uninteresting data (such as an APPn marker). bytes_in_buffer will be
1092 * zero on return if the skip is larger than the current contents of the
1093 * buffer.
1094 *
1095 * A negative skip count is treated as a no-op. A zero skip count
1096 * skips any remaining skip from a previous skip while suspended.
1097 *
1098 * Note that with I/O suspension turned on, this procedure does not
1099 * call skipBytes since the JPEG library has a very simple backtracking
1100 * mechanism which relies on the fact that the application level has
1101 * exclusive control over actual I/O.
1102 */
1103
1104 GLOBAL(void)
1105 imageio_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
1106 {
1107 struct jpeg_source_mgr *src = cinfo->src;
1108 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1109 streamBufferPtr sb = &data->streamBuf;
1110 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1111 jlong ret;
1112 jobject reader;
1113 jobject input = NULL;
1114
1115 if (num_bytes < 0) {
1116 return;
1117 }
1118 num_bytes += sb->remaining_skip;
1119 sb->remaining_skip = 0;
1120
1121 /* First the easy case where we are skipping <= the current contents. */
1122 ret = src->bytes_in_buffer;
1123 if (ret >= num_bytes) {
1124 src->next_input_byte += num_bytes;
1125 src->bytes_in_buffer -= num_bytes;
1126 return;
1127 }
1128
1129 /*
1130 * We are skipping more than is in the buffer. We empty the buffer and,
1131 * if we aren't suspended, call the Java skipBytes method. We always
1132 * leave the buffer empty, to be filled by either fill method above.
1133 */
1134 src->bytes_in_buffer = 0;
1135 src->next_input_byte = sb->buf;
1136
1137 num_bytes -= (long)ret;
1138 if (sb->suspendable) {
1139 sb->remaining_skip = num_bytes;
1140 return;
1141 }
1142
1143 RELEASE_ARRAYS(env, data, src->next_input_byte);
1144
1145 GET_IO_REF(input);
1146
1147 ret = (*env)->CallLongMethod(env,
1148 input,
1149 JPEGImageReader_skipInputBytesID,
1150 (jlong) num_bytes);
1151 if ((*env)->ExceptionOccurred(env)
1152 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1153 cinfo->err->error_exit((j_common_ptr) cinfo);
1154 }
1155
1156 /*
1157 * If we have reached the end of the stream, then the EOI marker
1158 * is missing. We accept such streams but generate a warning.
1159 * The image is likely to be corrupted, though everything through
1160 * the end of the last complete MCU should be usable.
1161 */
1162 if (ret <= 0) {
1163 reader = data->imageIOobj;
1164 RELEASE_ARRAYS(env, data, src->next_input_byte);
1165 (*env)->CallVoidMethod(env,
1166 reader,
1167 JPEGImageReader_warningOccurredID,
1168 READ_NO_EOI);
1169
1170 if ((*env)->ExceptionOccurred(env)
1171 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1172 cinfo->err->error_exit((j_common_ptr) cinfo);
1173 }
1174 sb->buf[0] = (JOCTET) 0xFF;
1175 sb->buf[1] = (JOCTET) JPEG_EOI;
1176 src->bytes_in_buffer = 2;
1177 src->next_input_byte = sb->buf;
1178 }
1179 }
1180
1181 /*
1182 * Terminate source --- called by jpeg_finish_decompress() after all
1183 * data for an image has been read. In our case pushes back any
1184 * remaining data, as it will be for another image and must be available
1185 * for java to find out that there is another image. Also called if
1186 * reseting state after reading a tables-only image.
1187 */
1188
1189 GLOBAL(void)
1190 imageio_term_source(j_decompress_ptr cinfo)
1191 {
1192 // To pushback, just seek back by src->bytes_in_buffer
1193 struct jpeg_source_mgr *src = cinfo->src;
1194 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
1195 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
1196 jobject reader = data->imageIOobj;
1197 if (src->bytes_in_buffer > 0) {
1198 RELEASE_ARRAYS(env, data, src->next_input_byte);
1199 (*env)->CallVoidMethod(env,
1200 reader,
1201 JPEGImageReader_pushBackID,
1202 src->bytes_in_buffer);
1203
1204 if ((*env)->ExceptionOccurred(env)
1205 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
1206 cinfo->err->error_exit((j_common_ptr) cinfo);
1207 }
1208 src->bytes_in_buffer = 0;
1209 //src->next_input_byte = sb->buf;
1210 }
1211 }
1212
1213 /********************* end of source manager ******************/
1214
1215 /********************* ICC profile support ********************/
1216 /*
1217 * The following routines are modified versions of the ICC
1218 * profile support routines available from the IJG website.
1219 * The originals were written by Todd Newman
1220 * <tdn@eccentric.esd.sgi.com> and modified by Tom Lane for
1221 * the IJG. They are further modified to fit in the context
1222 * of the imageio JPEG plug-in.
1223 */
1224
1225 /*
1226 * Since an ICC profile can be larger than the maximum size of a JPEG marker
1227 * (64K), we need provisions to split it into multiple markers. The format
1228 * defined by the ICC specifies one or more APP2 markers containing the
1229 * following data:
1230 * Identifying string ASCII "ICC_PROFILE\0" (12 bytes)
1231 * Marker sequence number 1 for first APP2, 2 for next, etc (1 byte)
1232 * Number of markers Total number of APP2's used (1 byte)
1233 * Profile data (remainder of APP2 data)
1234 * Decoders should use the marker sequence numbers to reassemble the profile,
1235 * rather than assuming that the APP2 markers appear in the correct sequence.
1236 */
1237
1238 #define ICC_MARKER (JPEG_APP0 + 2) /* JPEG marker code for ICC */
1239 #define ICC_OVERHEAD_LEN 14 /* size of non-profile data in APP2 */
1240 #define MAX_BYTES_IN_MARKER 65533 /* maximum data len of a JPEG marker */
1241 #define MAX_DATA_BYTES_IN_ICC_MARKER (MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN)
1242
1243
1244 /*
1245 * Handy subroutine to test whether a saved marker is an ICC profile marker.
1246 */
1247
1248 static boolean
1249 marker_is_icc (jpeg_saved_marker_ptr marker)
1250 {
1251 return
1252 marker->marker == ICC_MARKER &&
1253 marker->data_length >= ICC_OVERHEAD_LEN &&
1254 /* verify the identifying string */
1255 GETJOCTET(marker->data[0]) == 0x49 &&
1256 GETJOCTET(marker->data[1]) == 0x43 &&
1257 GETJOCTET(marker->data[2]) == 0x43 &&
1258 GETJOCTET(marker->data[3]) == 0x5F &&
1259 GETJOCTET(marker->data[4]) == 0x50 &&
1260 GETJOCTET(marker->data[5]) == 0x52 &&
1261 GETJOCTET(marker->data[6]) == 0x4F &&
1262 GETJOCTET(marker->data[7]) == 0x46 &&
1263 GETJOCTET(marker->data[8]) == 0x49 &&
1264 GETJOCTET(marker->data[9]) == 0x4C &&
1265 GETJOCTET(marker->data[10]) == 0x45 &&
1266 GETJOCTET(marker->data[11]) == 0x0;
1267 }
1268
1269 /*
1270 * See if there was an ICC profile in the JPEG file being read;
1271 * if so, reassemble and return the profile data as a new Java byte array.
1272 * If there was no ICC profile, return NULL.
1273 *
1274 * If the file contains invalid ICC APP2 markers, we throw an IIOException
1275 * with an appropriate message.
1276 */
1277
1278 jbyteArray
1279 read_icc_profile (JNIEnv *env, j_decompress_ptr cinfo)
1280 {
1281 jpeg_saved_marker_ptr marker;
1282 int num_markers = 0;
1283 int num_found_markers = 0;
1284 int seq_no;
1285 JOCTET *icc_data;
1286 JOCTET *dst_ptr;
1287 unsigned int total_length;
1288 #define MAX_SEQ_NO 255 // sufficient since marker numbers are bytes
1289 jpeg_saved_marker_ptr icc_markers[MAX_SEQ_NO + 1];
1290 int first; // index of the first marker in the icc_markers array
1291 int last; // index of the last marker in the icc_markers array
1292 jbyteArray data = NULL;
1293
1294 /* This first pass over the saved markers discovers whether there are
1295 * any ICC markers and verifies the consistency of the marker numbering.
1296 */
1297
1298 for (seq_no = 0; seq_no <= MAX_SEQ_NO; seq_no++)
1299 icc_markers[seq_no] = NULL;
1300
1301
1302 for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) {
1303 if (marker_is_icc(marker)) {
1304 if (num_markers == 0)
1305 num_markers = GETJOCTET(marker->data[13]);
1306 else if (num_markers != GETJOCTET(marker->data[13])) {
1307 JNU_ThrowByName(env, "javax/imageio/IIOException",
1308 "Invalid icc profile: inconsistent num_markers fields");
1309 return NULL;
1310 }
1311 seq_no = GETJOCTET(marker->data[12]);
1312
1313 /* Some third-party tools produce images with profile chunk
1314 * numeration started from zero. It is inconsistent with ICC
1315 * spec, but seems to be recognized by majority of image
1316 * processing tools, so we should be more tolerant to this
1317 * departure from the spec.
1318 */
1319 if (seq_no < 0 || seq_no > num_markers) {
1320 JNU_ThrowByName(env, "javax/imageio/IIOException",
1321 "Invalid icc profile: bad sequence number");
1322 return NULL;
1323 }
1324 if (icc_markers[seq_no] != NULL) {
1325 JNU_ThrowByName(env, "javax/imageio/IIOException",
1326 "Invalid icc profile: duplicate sequence numbers");
1327 return NULL;
1328 }
1329 icc_markers[seq_no] = marker;
1330 num_found_markers ++;
1331 }
1332 }
1333
1334 if (num_markers == 0)
1335 return NULL; // There is no profile
1336
1337 if (num_markers != num_found_markers) {
1338 JNU_ThrowByName(env, "javax/imageio/IIOException",
1339 "Invalid icc profile: invalid number of icc markers");
1340 return NULL;
1341 }
1342
1343 first = icc_markers[0] ? 0 : 1;
1344 last = num_found_markers + first;
1345
1346 /* Check for missing markers, count total space needed.
1347 */
1348 total_length = 0;
1349 for (seq_no = first; seq_no < last; seq_no++) {
1350 unsigned int length;
1351 if (icc_markers[seq_no] == NULL) {
1352 JNU_ThrowByName(env, "javax/imageio/IIOException",
1353 "Invalid icc profile: missing sequence number");
1354 return NULL;
1355 }
1356 /* check the data length correctness */
1357 length = icc_markers[seq_no]->data_length;
1358 if (ICC_OVERHEAD_LEN > length || length > MAX_BYTES_IN_MARKER) {
1359 JNU_ThrowByName(env, "javax/imageio/IIOException",
1360 "Invalid icc profile: invalid data length");
1361 return NULL;
1362 }
1363 total_length += (length - ICC_OVERHEAD_LEN);
1364 }
1365
1366 if (total_length <= 0) {
1367 JNU_ThrowByName(env, "javax/imageio/IIOException",
1368 "Invalid icc profile: found only empty markers");
1369 return NULL;
1370 }
1371
1372 /* Allocate a Java byte array for assembled data */
1373
1374 data = (*env)->NewByteArray(env, total_length);
1375 if (data == NULL) {
1376 JNU_ThrowByName(env,
1377 "java/lang/OutOfMemoryError",
1378 "Reading ICC profile");
1379 return NULL;
1380 }
1381
1382 icc_data = (JOCTET *)(*env)->GetPrimitiveArrayCritical(env,
1383 data,
1384 NULL);
1385 if (icc_data == NULL) {
1386 JNU_ThrowByName(env, "javax/imageio/IIOException",
1387 "Unable to pin icc profile data array");
1388 return NULL;
1389 }
1390
1391 /* and fill it in */
1392 dst_ptr = icc_data;
1393 for (seq_no = first; seq_no < last; seq_no++) {
1394 JOCTET FAR *src_ptr = icc_markers[seq_no]->data + ICC_OVERHEAD_LEN;
1395 unsigned int length =
1396 icc_markers[seq_no]->data_length - ICC_OVERHEAD_LEN;
1397
1398 memcpy(dst_ptr, src_ptr, length);
1399 dst_ptr += length;
1400 }
1401
1402 /* finally, unpin the array */
1403 (*env)->ReleasePrimitiveArrayCritical(env,
1404 data,
1405 icc_data,
1406 0);
1407
1408
1409 return data;
1410 }
1411
1412 /********************* end of ICC profile support *************/
1413
1414 /********************* Reader JNI calls ***********************/
1415
1416 JNIEXPORT void JNICALL
1417 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initReaderIDs
1418 (JNIEnv *env,
1419 jclass cls,
1420 jclass ImageInputStreamClass,
1421 jclass qTableClass,
1422 jclass huffClass) {
1423
1424 CHECK_NULL(JPEGImageReader_readInputDataID = (*env)->GetMethodID(env,
1425 cls,
1426 "readInputData",
1427 "([BII)I"));
1428 CHECK_NULL(JPEGImageReader_skipInputBytesID = (*env)->GetMethodID(env,
1429 cls,
1430 "skipInputBytes",
1431 "(J)J"));
1432 CHECK_NULL(JPEGImageReader_warningOccurredID = (*env)->GetMethodID(env,
1433 cls,
1434 "warningOccurred",
1435 "(I)V"));
1436 CHECK_NULL(JPEGImageReader_warningWithMessageID =
1437 (*env)->GetMethodID(env,
1438 cls,
1439 "warningWithMessage",
1440 "(Ljava/lang/String;)V"));
1441 CHECK_NULL(JPEGImageReader_setImageDataID = (*env)->GetMethodID(env,
1442 cls,
1443 "setImageData",
1444 "(IIIII[B)V"));
1445 CHECK_NULL(JPEGImageReader_acceptPixelsID = (*env)->GetMethodID(env,
1446 cls,
1447 "acceptPixels",
1448 "(IZ)V"));
1449 CHECK_NULL(JPEGImageReader_passStartedID = (*env)->GetMethodID(env,
1450 cls,
1451 "passStarted",
1452 "(I)V"));
1453 CHECK_NULL(JPEGImageReader_passCompleteID = (*env)->GetMethodID(env,
1454 cls,
1455 "passComplete",
1456 "()V"));
1457 CHECK_NULL(JPEGImageReader_pushBackID = (*env)->GetMethodID(env,
1458 cls,
1459 "pushBack",
1460 "(I)V"));
1461 CHECK_NULL(JPEGQTable_tableID = (*env)->GetFieldID(env,
1462 qTableClass,
1463 "qTable",
1464 "[I"));
1465
1466 CHECK_NULL(JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env,
1467 huffClass,
1468 "lengths",
1469 "[S"));
1470
1471 CHECK_NULL(JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env,
1472 huffClass,
1473 "values",
1474 "[S"));
1475 }
1476
1477 JNIEXPORT jlong JNICALL
1478 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader
1479 (JNIEnv *env,
1480 jobject this) {
1481
1482 imageIODataPtr ret;
1483 struct sun_jpeg_error_mgr *jerr;
1484
1485 /* This struct contains the JPEG decompression parameters and pointers to
1486 * working space (which is allocated as needed by the JPEG library).
1487 */
1488 struct jpeg_decompress_struct *cinfo =
1489 malloc(sizeof(struct jpeg_decompress_struct));
1490 if (cinfo == NULL) {
1491 JNU_ThrowByName( env,
1492 "java/lang/OutOfMemoryError",
1493 "Initializing Reader");
1494 return 0;
1495 }
1496
1497 /* We use our private extension JPEG error handler.
1498 */
1499 jerr = malloc (sizeof(struct sun_jpeg_error_mgr));
1500 if (jerr == NULL) {
1501 JNU_ThrowByName( env,
1502 "java/lang/OutOfMemoryError",
1503 "Initializing Reader");
1504 free(cinfo);
1505 return 0;
1506 }
1507
1508 /* We set up the normal JPEG error routines, then override error_exit. */
1509 cinfo->err = jpeg_std_error(&(jerr->pub));
1510 jerr->pub.error_exit = sun_jpeg_error_exit;
1511 /* We need to setup our own print routines */
1512 jerr->pub.output_message = sun_jpeg_output_message;
1513 /* Now we can setjmp before every call to the library */
1514
1515 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1516 if (setjmp(jerr->setjmp_buffer)) {
1517 /* If we get here, the JPEG code has signaled an error. */
1518 char buffer[JMSG_LENGTH_MAX];
1519 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1520 buffer);
1521 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1522 return 0;
1523 }
1524
1525 /* Perform library initialization */
1526 jpeg_create_decompress(cinfo);
1527
1528 // Set up to keep any APP2 markers, as these might contain ICC profile
1529 // data
1530 jpeg_save_markers(cinfo, ICC_MARKER, 0xFFFF);
1531
1532 /*
1533 * Now set up our source.
1534 */
1535 cinfo->src =
1536 (struct jpeg_source_mgr *) malloc (sizeof(struct jpeg_source_mgr));
1537 if (cinfo->src == NULL) {
1538 JNU_ThrowByName(env,
1539 "java/lang/OutOfMemoryError",
1540 "Initializing Reader");
1541 imageio_dispose((j_common_ptr)cinfo);
1542 return 0;
1543 }
1544 cinfo->src->bytes_in_buffer = 0;
1545 cinfo->src->next_input_byte = NULL;
1546 cinfo->src->init_source = imageio_init_source;
1547 cinfo->src->fill_input_buffer = imageio_fill_input_buffer;
1548 cinfo->src->skip_input_data = imageio_skip_input_data;
1549 cinfo->src->resync_to_restart = jpeg_resync_to_restart; // use default
1550 cinfo->src->term_source = imageio_term_source;
1551
1552 /* set up the association to persist for future calls */
1553 ret = initImageioData(env, (j_common_ptr) cinfo, this);
1554 if (ret == NULL) {
1555 (*env)->ExceptionClear(env);
1556 JNU_ThrowByName(env, "java/lang/OutOfMemoryError",
1557 "Initializing Reader");
1558 imageio_dispose((j_common_ptr)cinfo);
1559 return 0;
1560 }
1561 return ptr_to_jlong(ret);
1562 }
1563
1564 /*
1565 * When we set a source from Java, we set up the stream in the streamBuf
1566 * object. If there was an old one, it is released first.
1567 */
1568
1569 JNIEXPORT void JNICALL
1570 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setSource
1571 (JNIEnv *env,
1572 jobject this,
1573 jlong ptr) {
1574
1575 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1576 j_common_ptr cinfo;
1577
1578 if (data == NULL) {
1579 JNU_ThrowByName(env,
1580 "java/lang/IllegalStateException",
1581 "Attempting to use reader after dispose()");
1582 return;
1583 }
1584
1585 cinfo = data->jpegObj;
1586
1587 imageio_set_stream(env, cinfo, data, this);
1588
1589 imageio_init_source((j_decompress_ptr) cinfo);
1590 }
1591
1592 #define JPEG_APP1 (JPEG_APP0 + 1) /* EXIF APP1 marker code */
1593
1594 /*
1595 * For EXIF images, the APP1 will appear immediately after the SOI,
1596 * so it's safe to only look at the first marker in the list.
1597 * (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 58)
1598 */
1599 #define IS_EXIF(c) \
1600 (((c)->marker_list != NULL) && ((c)->marker_list->marker == JPEG_APP1))
1601
1602 JNIEXPORT jboolean JNICALL
1603 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImageHeader
1604 (JNIEnv *env,
1605 jobject this,
1606 jlong ptr,
1607 jboolean clearFirst,
1608 jboolean reset) {
1609
1610 int ret;
1611 int h_samp0, h_samp1, h_samp2;
1612 int v_samp0, v_samp1, v_samp2;
1613 jboolean retval = JNI_FALSE;
1614 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1615 j_decompress_ptr cinfo;
1616 struct jpeg_source_mgr *src;
1617 sun_jpeg_error_ptr jerr;
1618 jbyteArray profileData = NULL;
1619
1620 if (data == NULL) {
1621 JNU_ThrowByName(env,
1622 "java/lang/IllegalStateException",
1623 "Attempting to use reader after dispose()");
1624 return JNI_FALSE;
1625 }
1626
1627 cinfo = (j_decompress_ptr) data->jpegObj;
1628 src = cinfo->src;
1629
1630 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1631 jerr = (sun_jpeg_error_ptr) cinfo->err;
1632
1633 if (setjmp(jerr->setjmp_buffer)) {
1634 /* If we get here, the JPEG code has signaled an error
1635 while reading the header. */
1636 RELEASE_ARRAYS(env, data, src->next_input_byte);
1637 if (!(*env)->ExceptionOccurred(env)) {
1638 char buffer[JMSG_LENGTH_MAX];
1639 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1640 buffer);
1641 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1642 }
1643 return retval;
1644 }
1645
1646 #ifdef DEBUG_IIO_JPEG
1647 printf("In readImageHeader, data is %p cinfo is %p\n", data, cinfo);
1648 printf("clearFirst is %d\n", clearFirst);
1649 #endif
1650
1651 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) {
1652 (*env)->ExceptionClear(env);
1653 JNU_ThrowByName(env,
1654 "javax/imageio/IIOException",
1655 "Array pin failed");
1656 return retval;
1657 }
1658
1659 /*
1660 * Now clear the input buffer if the Java code has done a seek
1661 * on the stream since the last call, invalidating any buffer contents.
1662 */
1663 if (clearFirst) {
1664 clearStreamBuffer(&data->streamBuf);
1665 src->next_input_byte = NULL;
1666 src->bytes_in_buffer = 0;
1667 }
1668
1669 ret = jpeg_read_header(cinfo, FALSE);
1670
1671 if (ret == JPEG_HEADER_TABLES_ONLY) {
1672 retval = JNI_TRUE;
1673 imageio_term_source(cinfo); // Pushback remaining buffer contents
1674 #ifdef DEBUG_IIO_JPEG
1675 printf("just read tables-only image; q table 0 at %p\n",
1676 cinfo->quant_tbl_ptrs[0]);
1677 #endif
1678 RELEASE_ARRAYS(env, data, src->next_input_byte);
1679 } else {
1680 /*
1681 * Now adjust the jpeg_color_space variable, which was set in
1682 * default_decompress_parms, to reflect our differences from IJG
1683 */
1684
1685 switch (cinfo->jpeg_color_space) {
1686 default :
1687 break;
1688 case JCS_YCbCr:
1689
1690 /*
1691 * There are several possibilities:
1692 * - we got image with embeded colorspace
1693 * Use it. User knows what he is doing.
1694 * - we got JFIF image
1695 * Must be YCbCr (see http://www.w3.org/Graphics/JPEG/jfif3.pdf, page 2)
1696 * - we got EXIF image
1697 * Must be YCbCr (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 63)
1698 * - something else
1699 * Apply heuristical rules to identify actual colorspace.
1700 */
1701
1702 if (cinfo->saw_Adobe_marker) {
1703 if (cinfo->Adobe_transform != 1) {
1704 /*
1705 * IJG guesses this is YCbCr and emits a warning
1706 * We would rather not guess. Then the user knows
1707 * To read this as a Raster if at all
1708 */
1709 cinfo->jpeg_color_space = JCS_UNKNOWN;
1710 cinfo->out_color_space = JCS_UNKNOWN;
1711 }
1712 } else if (!cinfo->saw_JFIF_marker && !IS_EXIF(cinfo)) {
1713 /*
1714 * IJG assumes all unidentified 3-channels are YCbCr.
1715 * We assume that only if the second two channels are
1716 * subsampled (either horizontally or vertically). If not,
1717 * we assume RGB.
1718 *
1719 * 4776576: Some digital cameras output YCbCr JPEG images
1720 * that do not contain a JFIF APP0 marker but are only
1721 * vertically subsampled (no horizontal subsampling).
1722 * We should only assume this is RGB data if the subsampling
1723 * factors for the second two channels are the same as the
1724 * first (check both horizontal and vertical factors).
1725 */
1726 h_samp0 = cinfo->comp_info[0].h_samp_factor;
1727 h_samp1 = cinfo->comp_info[1].h_samp_factor;
1728 h_samp2 = cinfo->comp_info[2].h_samp_factor;
1729
1730 v_samp0 = cinfo->comp_info[0].v_samp_factor;
1731 v_samp1 = cinfo->comp_info[1].v_samp_factor;
1732 v_samp2 = cinfo->comp_info[2].v_samp_factor;
1733
1734 if ((h_samp1 == h_samp0) && (h_samp2 == h_samp0) &&
1735 (v_samp1 == v_samp0) && (v_samp2 == v_samp0))
1736 {
1737 cinfo->jpeg_color_space = JCS_RGB;
1738 /* output is already RGB, so it stays the same */
1739 }
1740 }
1741 break;
1742 #ifdef YCCALPHA
1743 case JCS_YCC:
1744 cinfo->out_color_space = JCS_YCC;
1745 break;
1746 #endif
1747 case JCS_YCCK:
1748 if ((cinfo->saw_Adobe_marker) && (cinfo->Adobe_transform != 2)) {
1749 /*
1750 * IJG guesses this is YCCK and emits a warning
1751 * We would rather not guess. Then the user knows
1752 * To read this as a Raster if at all
1753 */
1754 cinfo->jpeg_color_space = JCS_UNKNOWN;
1755 cinfo->out_color_space = JCS_UNKNOWN;
1756 }
1757 break;
1758 case JCS_CMYK:
1759 /*
1760 * IJG assumes all unidentified 4-channels are CMYK.
1761 * We assume that only if the second two channels are
1762 * not subsampled (either horizontally or vertically).
1763 * If they are, we assume YCCK.
1764 */
1765 h_samp0 = cinfo->comp_info[0].h_samp_factor;
1766 h_samp1 = cinfo->comp_info[1].h_samp_factor;
1767 h_samp2 = cinfo->comp_info[2].h_samp_factor;
1768
1769 v_samp0 = cinfo->comp_info[0].v_samp_factor;
1770 v_samp1 = cinfo->comp_info[1].v_samp_factor;
1771 v_samp2 = cinfo->comp_info[2].v_samp_factor;
1772
1773 if ((h_samp1 > h_samp0) && (h_samp2 > h_samp0) ||
1774 (v_samp1 > v_samp0) && (v_samp2 > v_samp0))
1775 {
1776 cinfo->jpeg_color_space = JCS_YCCK;
1777 /* Leave the output space as CMYK */
1778 }
1779 }
1780 RELEASE_ARRAYS(env, data, src->next_input_byte);
1781
1782 /* read icc profile data */
1783 profileData = read_icc_profile(env, cinfo);
1784
1785 if ((*env)->ExceptionCheck(env)) {
1786 return retval;
1787 }
1788
1789 (*env)->CallVoidMethod(env, this,
1790 JPEGImageReader_setImageDataID,
1791 cinfo->image_width,
1792 cinfo->image_height,
1793 cinfo->jpeg_color_space,
1794 cinfo->out_color_space,
1795 cinfo->num_components,
1796 profileData);
1797 if (reset) {
1798 jpeg_abort_decompress(cinfo);
1799 }
1800 }
1801
1802 return retval;
1803 }
1804
1805
1806 JNIEXPORT void JNICALL
1807 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setOutColorSpace
1808 (JNIEnv *env,
1809 jobject this,
1810 jlong ptr,
1811 jint code) {
1812
1813 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1814 j_decompress_ptr cinfo;
1815
1816 if (data == NULL) {
1817 JNU_ThrowByName(env,
1818 "java/lang/IllegalStateException",
1819 "Attempting to use reader after dispose()");
1820 return;
1821 }
1822
1823 cinfo = (j_decompress_ptr) data->jpegObj;
1824
1825 cinfo->out_color_space = code;
1826
1827 }
1828
1829 JNIEXPORT jboolean JNICALL
1830 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImage
1831 (JNIEnv *env,
1832 jobject this,
1833 jlong ptr,
1834 jbyteArray buffer,
1835 jint numBands,
1836 jintArray srcBands,
1837 jintArray bandSizes,
1838 jint sourceXStart,
1839 jint sourceYStart,
1840 jint sourceWidth,
1841 jint sourceHeight,
1842 jint stepX,
1843 jint stepY,
1844 jobjectArray qtables,
1845 jobjectArray DCHuffmanTables,
1846 jobjectArray ACHuffmanTables,
1847 jint minProgressivePass, // Counts from 0
1848 jint maxProgressivePass,
1849 jboolean wantUpdates) {
1850
1851
1852 struct jpeg_source_mgr *src;
1853 JSAMPROW scanLinePtr = NULL;
1854 jint bands[MAX_BANDS];
1855 int i;
1856 jint *body;
1857 int scanlineLimit;
1858 int pixelStride;
1859 unsigned char *in, *out, *pixelLimit;
1860 int targetLine;
1861 int skipLines, linesLeft;
1862 pixelBufferPtr pb;
1863 sun_jpeg_error_ptr jerr;
1864 boolean done;
1865 boolean mustScale = FALSE;
1866 boolean progressive = FALSE;
1867 boolean orderedBands = TRUE;
1868 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
1869 j_decompress_ptr cinfo;
1870 size_t numBytes;
1871
1872 /* verify the inputs */
1873
1874 if (data == NULL) {
1875 JNU_ThrowByName(env,
1876 "java/lang/IllegalStateException",
1877 "Attempting to use reader after dispose()");
1878 return JNI_FALSE;
1879 }
1880
1881 if ((buffer == NULL) || (srcBands == NULL)) {
1882 JNU_ThrowNullPointerException(env, 0);
1883 return JNI_FALSE;
1884 }
1885
1886 cinfo = (j_decompress_ptr) data->jpegObj;
1887
1888 if ((numBands < 1) || (numBands > MAX_BANDS) ||
1889 (sourceXStart < 0) || (sourceXStart >= (jint)cinfo->image_width) ||
1890 (sourceYStart < 0) || (sourceYStart >= (jint)cinfo->image_height) ||
1891 (sourceWidth < 1) || (sourceWidth > (jint)cinfo->image_width) ||
1892 (sourceHeight < 1) || (sourceHeight > (jint)cinfo->image_height) ||
1893 (stepX < 1) || (stepY < 1) ||
1894 (minProgressivePass < 0) ||
1895 (maxProgressivePass < minProgressivePass))
1896 {
1897 JNU_ThrowByName(env, "javax/imageio/IIOException",
1898 "Invalid argument to native readImage");
1899 return JNI_FALSE;
1900 }
1901
1902 if (stepX > (jint)cinfo->image_width) {
1903 stepX = cinfo->image_width;
1904 }
1905 if (stepY > (jint)cinfo->image_height) {
1906 stepY = cinfo->image_height;
1907 }
1908
1909 /*
1910 * First get the source bands array and copy it to our local array
1911 * so we don't have to worry about pinning and unpinning it again.
1912 */
1913
1914 body = (*env)->GetIntArrayElements(env, srcBands, NULL);
1915 if (body == NULL) {
1916 (*env)->ExceptionClear(env);
1917 JNU_ThrowByName( env,
1918 "java/lang/OutOfMemoryError",
1919 "Initializing Read");
1920 return JNI_FALSE;
1921 }
1922
1923 for (i = 0; i < numBands; i++) {
1924 bands[i] = body[i];
1925 if (orderedBands && (bands[i] != i)) {
1926 orderedBands = FALSE;
1927 }
1928 }
1929
1930 (*env)->ReleaseIntArrayElements(env, srcBands, body, JNI_ABORT);
1931
1932 #ifdef DEBUG_IIO_JPEG
1933 printf("---- in reader.read ----\n");
1934 printf("numBands is %d\n", numBands);
1935 printf("bands array: ");
1936 for (i = 0; i < numBands; i++) {
1937 printf("%d ", bands[i]);
1938 }
1939 printf("\n");
1940 printf("jq table 0 at %p\n",
1941 cinfo->quant_tbl_ptrs[0]);
1942 #endif
1943
1944 data = (imageIODataPtr) cinfo->client_data;
1945 src = cinfo->src;
1946
1947 /* Set the buffer as our PixelBuffer */
1948 pb = &data->pixelBuf;
1949
1950 if (setPixelBuffer(env, pb, buffer) == NOT_OK) {
1951 return data->abortFlag; // We already threw an out of memory exception
1952 }
1953
1954 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
1955 jerr = (sun_jpeg_error_ptr) cinfo->err;
1956
1957 if (setjmp(jerr->setjmp_buffer)) {
1958 /* If we get here, the JPEG code has signaled an error
1959 while reading. */
1960 RELEASE_ARRAYS(env, data, src->next_input_byte);
1961 if (!(*env)->ExceptionOccurred(env)) {
1962 char buffer[JMSG_LENGTH_MAX];
1963 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
1964 buffer);
1965 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
1966 }
1967 if (scanLinePtr != NULL) {
1968 free(scanLinePtr);
1969 scanLinePtr = NULL;
1970 }
1971 return data->abortFlag;
1972 }
1973
1974 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) {
1975 (*env)->ExceptionClear(env);
1976 JNU_ThrowByName(env,
1977 "javax/imageio/IIOException",
1978 "Array pin failed");
1979 return data->abortFlag;
1980 }
1981
1982 // If there are no tables in our structure and table arguments aren't
1983 // NULL, use the table arguments.
1984 if ((qtables != NULL) && (cinfo->quant_tbl_ptrs[0] == NULL)) {
1985 (void) setQTables(env, (j_common_ptr) cinfo, qtables, TRUE);
1986 }
1987
1988 if ((DCHuffmanTables != NULL) && (cinfo->dc_huff_tbl_ptrs[0] == NULL)) {
1989 setHTables(env, (j_common_ptr) cinfo,
1990 DCHuffmanTables,
1991 ACHuffmanTables,
1992 TRUE);
1993 }
1994
1995 progressive = jpeg_has_multiple_scans(cinfo);
1996 if (progressive) {
1997 cinfo->buffered_image = TRUE;
1998 cinfo->input_scan_number = minProgressivePass+1; // Java count from 0
1999 #define MAX_JAVA_INT 2147483647 // XXX Is this defined in JNI somewhere?
2000 if (maxProgressivePass < MAX_JAVA_INT) {
2001 maxProgressivePass++; // For testing
2002 }
2003 }
2004
2005 data->streamBuf.suspendable = FALSE;
2006
2007 jpeg_start_decompress(cinfo);
2008
2009 if (numBands != cinfo->output_components) {
2010 JNU_ThrowByName(env, "javax/imageio/IIOException",
2011 "Invalid argument to native readImage");
2012 return data->abortFlag;
2013 }
2014
2015 if (cinfo->output_components <= 0 ||
2016 cinfo->image_width > (0xffffffffu / (unsigned int)cinfo->output_components))
2017 {
2018 JNU_ThrowByName(env, "javax/imageio/IIOException",
2019 "Invalid number of output components");
2020 return data->abortFlag;
2021 }
2022
2023 // Allocate a 1-scanline buffer
2024 scanLinePtr = (JSAMPROW)malloc(cinfo->image_width*cinfo->output_components);
2025 if (scanLinePtr == NULL) {
2026 RELEASE_ARRAYS(env, data, src->next_input_byte);
2027 JNU_ThrowByName( env,
2028 "java/lang/OutOfMemoryError",
2029 "Reading JPEG Stream");
2030 return data->abortFlag;
2031 }
2032
2033 // loop over progressive passes
2034 done = FALSE;
2035 while (!done) {
2036 if (progressive) {
2037 // initialize the next pass. Note that this skips up to
2038 // the first interesting pass.
2039 jpeg_start_output(cinfo, cinfo->input_scan_number);
2040 if (wantUpdates) {
2041 (*env)->CallVoidMethod(env, this,
2042 JPEGImageReader_passStartedID,
2043 cinfo->input_scan_number-1);
2044 }
2045 } else if (wantUpdates) {
2046 (*env)->CallVoidMethod(env, this,
2047 JPEGImageReader_passStartedID,
2048 0);
2049
2050 }
2051
2052 // Skip until the first interesting line
2053 while ((data->abortFlag == JNI_FALSE)
2054 && ((jint)cinfo->output_scanline < sourceYStart)) {
2055 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2056 }
2057
2058 scanlineLimit = sourceYStart+sourceHeight;
2059 pixelLimit = scanLinePtr
2060 +(sourceXStart+sourceWidth)*cinfo->output_components;
2061
2062 pixelStride = stepX*cinfo->output_components;
2063 targetLine = 0;
2064
2065 while ((data->abortFlag == JNI_FALSE)
2066 && ((jint)cinfo->output_scanline < scanlineLimit)) {
2067
2068 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2069
2070 // Now mangle it into our buffer
2071 out = data->pixelBuf.buf.bp;
2072
2073 if (orderedBands && (pixelStride == numBands)) {
2074 // Optimization: The component bands are ordered sequentially,
2075 // so we can simply use memcpy() to copy the intermediate
2076 // scanline buffer into the raster.
2077 in = scanLinePtr + (sourceXStart * cinfo->output_components);
2078 if (pixelLimit > in) {
2079 numBytes = pixelLimit - in;
2080 if (numBytes > data->pixelBuf.byteBufferLength) {
2081 numBytes = data->pixelBuf.byteBufferLength;
2082 }
2083 memcpy(out, in, numBytes);
2084 }
2085 } else {
2086 numBytes = numBands;
2087 for (in = scanLinePtr+sourceXStart*cinfo->output_components;
2088 in < pixelLimit &&
2089 numBytes <= data->pixelBuf.byteBufferLength;
2090 in += pixelStride) {
2091 for (i = 0; i < numBands; i++) {
2092 *out++ = *(in+bands[i]);
2093 }
2094 numBytes += numBands;
2095 }
2096 }
2097
2098 // And call it back to Java
2099 RELEASE_ARRAYS(env, data, src->next_input_byte);
2100 (*env)->CallVoidMethod(env,
2101 this,
2102 JPEGImageReader_acceptPixelsID,
2103 targetLine++,
2104 progressive);
2105
2106 if ((*env)->ExceptionOccurred(env)
2107 || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
2108 cinfo->err->error_exit((j_common_ptr) cinfo);
2109 }
2110
2111 // And skip over uninteresting lines to the next subsampled line
2112 // Ensure we don't go past the end of the image
2113
2114 // Lines to skip based on subsampling
2115 skipLines = stepY - 1;
2116 // Lines left in the image
2117 linesLeft = scanlineLimit - cinfo->output_scanline;
2118 // Take the minimum
2119 if (skipLines > linesLeft) {
2120 skipLines = linesLeft;
2121 }
2122 for(i = 0; i < skipLines; i++) {
2123 jpeg_read_scanlines(cinfo, &scanLinePtr, 1);
2124 }
2125 }
2126 if (progressive) {
2127 jpeg_finish_output(cinfo); // Increments pass counter
2128 // Call Java to notify pass complete
2129 if (jpeg_input_complete(cinfo)
2130 || (cinfo->input_scan_number > maxProgressivePass)) {
2131 done = TRUE;
2132 }
2133 } else {
2134 done = TRUE;
2135 }
2136 if (wantUpdates) {
2137 (*env)->CallVoidMethod(env, this,
2138 JPEGImageReader_passCompleteID);
2139 }
2140
2141 }
2142 /*
2143 * We are done, but we might not have read all the lines, or all
2144 * the passes, so use jpeg_abort instead of jpeg_finish_decompress.
2145 */
2146 if (cinfo->output_scanline == cinfo->output_height) {
2147 // if ((cinfo->output_scanline == cinfo->output_height) &&
2148 //(jpeg_input_complete(cinfo))) { // We read the whole file
2149 jpeg_finish_decompress(cinfo);
2150 } else {
2151 jpeg_abort_decompress(cinfo);
2152 }
2153
2154 free(scanLinePtr);
2155
2156 RELEASE_ARRAYS(env, data, src->next_input_byte);
2157
2158 return data->abortFlag;
2159 }
2160
2161 JNIEXPORT void JNICALL
2162 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_abortRead
2163 (JNIEnv *env,
2164 jobject this,
2165 jlong ptr) {
2166
2167 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2168
2169 if (data == NULL) {
2170 JNU_ThrowByName(env,
2171 "java/lang/IllegalStateException",
2172 "Attempting to use reader after dispose()");
2173 return;
2174 }
2175
2176 imageio_abort(env, this, data);
2177
2178 }
2179
2180 JNIEXPORT void JNICALL
2181 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetLibraryState
2182 (JNIEnv *env,
2183 jobject this,
2184 jlong ptr) {
2185 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2186 j_decompress_ptr cinfo;
2187
2188 if (data == NULL) {
2189 JNU_ThrowByName(env,
2190 "java/lang/IllegalStateException",
2191 "Attempting to use reader after dispose()");
2192 return;
2193 }
2194
2195 cinfo = (j_decompress_ptr) data->jpegObj;
2196
2197 jpeg_abort_decompress(cinfo);
2198 }
2199
2200
2201 JNIEXPORT void JNICALL
2202 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetReader
2203 (JNIEnv *env,
2204 jobject this,
2205 jlong ptr) {
2206
2207 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2208 j_decompress_ptr cinfo;
2209 sun_jpeg_error_ptr jerr;
2210
2211 if (data == NULL) {
2212 JNU_ThrowByName(env,
2213 "java/lang/IllegalStateException",
2214 "Attempting to use reader after dispose()");
2215 return;
2216 }
2217
2218 cinfo = (j_decompress_ptr) data->jpegObj;
2219
2220 jerr = (sun_jpeg_error_ptr) cinfo->err;
2221
2222 imageio_reset(env, (j_common_ptr) cinfo, data);
2223
2224 /*
2225 * The tables have not been reset, and there is no way to do so
2226 * in IJG without leaking memory. The only situation in which
2227 * this will cause a problem is if an image-only stream is read
2228 * with this object without initializing the correct tables first.
2229 * This situation, which should cause an error, might work but
2230 * produce garbage instead. If the huffman tables are wrong,
2231 * it will fail during the decode. If the q tables are wrong, it
2232 * will look strange. This is very unlikely, so don't worry about
2233 * it. To be really robust, we would keep a flag for table state
2234 * and consult it to catch exceptional situations.
2235 */
2236
2237 /* above does not clean up the source, so we have to */
2238
2239 /*
2240 We need to explicitly initialize exception handler or we may
2241 longjump to random address from the term_source()
2242 */
2243
2244 if (setjmp(jerr->setjmp_buffer)) {
2245
2246 /*
2247 We may get IOException from pushBack() here.
2248
2249 However it could be legal if original input stream was closed
2250 earlier (for example because network connection was closed).
2251 Unfortunately, image inputstream API has no way to check whether
2252 stream is already closed or IOException was thrown because of some
2253 other IO problem,
2254 And we can not avoid call to pushBack() on closed stream for the
2255 same reason.
2256
2257 So, for now we will silently eat this exception.
2258
2259 NB: this may be changed in future when ImageInputStream API will
2260 become more flexible.
2261 */
2262
2263 if ((*env)->ExceptionOccurred(env)) {
2264 (*env)->ExceptionClear(env);
2265 }
2266 } else {
2267 cinfo->src->term_source(cinfo);
2268 }
2269
2270 cinfo->src->bytes_in_buffer = 0;
2271 cinfo->src->next_input_byte = NULL;
2272 }
2273
2274 JNIEXPORT void JNICALL
2275 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_disposeReader
2276 (JNIEnv *env,
2277 jclass reader,
2278 jlong ptr) {
2279
2280 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2281 j_common_ptr info = destroyImageioData(env, data);
2282
2283 imageio_dispose(info);
2284 }
2285
2286 /********************** end of Reader *************************/
2287
2288 /********************** Writer Support ************************/
2289
2290 /********************** Destination Manager *******************/
2291
2292 METHODDEF(void)
2293 /*
2294 * Initialize destination --- called by jpeg_start_compress
2295 * before any data is actually written. The data arrays
2296 * must be pinned before this is called.
2297 */
2298 imageio_init_destination (j_compress_ptr cinfo)
2299 {
2300 struct jpeg_destination_mgr *dest = cinfo->dest;
2301 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2302 streamBufferPtr sb = &data->streamBuf;
2303 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2304
2305 if (sb->buf == NULL) {
2306 // We forgot to pin the array
2307 (*env)->FatalError(env, "Output buffer not pinned!");
2308 }
2309
2310 dest->next_output_byte = sb->buf;
2311 dest->free_in_buffer = sb->bufferLength;
2312 }
2313
2314 /*
2315 * Empty the output buffer --- called whenever buffer fills up.
2316 *
2317 * This routine writes the entire output buffer
2318 * (ignoring the current state of next_output_byte & free_in_buffer),
2319 * resets the pointer & count to the start of the buffer, and returns TRUE
2320 * indicating that the buffer has been dumped.
2321 */
2322
2323 METHODDEF(boolean)
2324 imageio_empty_output_buffer (j_compress_ptr cinfo)
2325 {
2326 struct jpeg_destination_mgr *dest = cinfo->dest;
2327 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2328 streamBufferPtr sb = &data->streamBuf;
2329 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2330 jobject output = NULL;
2331
2332 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2333
2334 GET_IO_REF(output);
2335
2336 (*env)->CallVoidMethod(env,
2337 output,
2338 JPEGImageWriter_writeOutputDataID,
2339 sb->hstreamBuffer,
2340 0,
2341 sb->bufferLength);
2342 if ((*env)->ExceptionOccurred(env)
2343 || !GET_ARRAYS(env, data,
2344 (const JOCTET **)(&dest->next_output_byte))) {
2345 cinfo->err->error_exit((j_common_ptr) cinfo);
2346 }
2347
2348 dest->next_output_byte = sb->buf;
2349 dest->free_in_buffer = sb->bufferLength;
2350
2351 return TRUE;
2352 }
2353
2354 /*
2355 * After all of the data has been encoded there may still be some
2356 * more left over in some of the working buffers. Now is the
2357 * time to clear them out.
2358 */
2359 METHODDEF(void)
2360 imageio_term_destination (j_compress_ptr cinfo)
2361 {
2362 struct jpeg_destination_mgr *dest = cinfo->dest;
2363 imageIODataPtr data = (imageIODataPtr) cinfo->client_data;
2364 streamBufferPtr sb = &data->streamBuf;
2365 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
2366
2367 /* find out how much needs to be written */
2368 /* this conversion from size_t to jint is safe, because the lenght of the buffer is limited by jint */
2369 jint datacount = (jint)(sb->bufferLength - dest->free_in_buffer);
2370
2371 if (datacount != 0) {
2372 jobject output = NULL;
2373
2374 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2375
2376 GET_IO_REF(output);
2377
2378 (*env)->CallVoidMethod(env,
2379 output,
2380 JPEGImageWriter_writeOutputDataID,
2381 sb->hstreamBuffer,
2382 0,
2383 datacount);
2384
2385 if ((*env)->ExceptionOccurred(env)
2386 || !GET_ARRAYS(env, data,
2387 (const JOCTET **)(&dest->next_output_byte))) {
2388 cinfo->err->error_exit((j_common_ptr) cinfo);
2389 }
2390 }
2391
2392 dest->next_output_byte = NULL;
2393 dest->free_in_buffer = 0;
2394
2395 }
2396
2397 /*
2398 * Flush the destination buffer. This is not called by the library,
2399 * but by our code below. This is the simplest implementation, though
2400 * certainly not the most efficient.
2401 */
2402 METHODDEF(void)
2403 imageio_flush_destination(j_compress_ptr cinfo)
2404 {
2405 imageio_term_destination(cinfo);
2406 imageio_init_destination(cinfo);
2407 }
2408
2409 /********************** end of destination manager ************/
2410
2411 /********************** Writer JNI calls **********************/
2412
2413
2414 JNIEXPORT void JNICALL
2415 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initWriterIDs
2416 (JNIEnv *env,
2417 jclass cls,
2418 jclass qTableClass,
2419 jclass huffClass) {
2420
2421 CHECK_NULL(JPEGImageWriter_writeOutputDataID = (*env)->GetMethodID(env,
2422 cls,
2423 "writeOutputData",
2424 "([BII)V"));
2425 CHECK_NULL(JPEGImageWriter_warningOccurredID = (*env)->GetMethodID(env,
2426 cls,
2427 "warningOccurred",
2428 "(I)V"));
2429 CHECK_NULL(JPEGImageWriter_warningWithMessageID =
2430 (*env)->GetMethodID(env,
2431 cls,
2432 "warningWithMessage",
2433 "(Ljava/lang/String;)V"));
2434 CHECK_NULL(JPEGImageWriter_writeMetadataID = (*env)->GetMethodID(env,
2435 cls,
2436 "writeMetadata",
2437 "()V"));
2438 CHECK_NULL(JPEGImageWriter_grabPixelsID = (*env)->GetMethodID(env,
2439 cls,
2440 "grabPixels",
2441 "(I)V"));
2442 CHECK_NULL(JPEGQTable_tableID = (*env)->GetFieldID(env,
2443 qTableClass,
2444 "qTable",
2445 "[I"));
2446 CHECK_NULL(JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env,
2447 huffClass,
2448 "lengths",
2449 "[S"));
2450 CHECK_NULL(JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env,
2451 huffClass,
2452 "values",
2453 "[S"));
2454 }
2455
2456 JNIEXPORT jlong JNICALL
2457 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter
2458 (JNIEnv *env,
2459 jobject this) {
2460
2461 imageIODataPtr ret;
2462 struct sun_jpeg_error_mgr *jerr;
2463 struct jpeg_destination_mgr *dest;
2464
2465 /* This struct contains the JPEG compression parameters and pointers to
2466 * working space (which is allocated as needed by the JPEG library).
2467 */
2468 struct jpeg_compress_struct *cinfo =
2469 malloc(sizeof(struct jpeg_compress_struct));
2470 if (cinfo == NULL) {
2471 JNU_ThrowByName( env,
2472 "java/lang/OutOfMemoryError",
2473 "Initializing Writer");
2474 return 0;
2475 }
2476
2477 /* We use our private extension JPEG error handler.
2478 */
2479 jerr = malloc (sizeof(struct sun_jpeg_error_mgr));
2480 if (jerr == NULL) {
2481 JNU_ThrowByName( env,
2482 "java/lang/OutOfMemoryError",
2483 "Initializing Writer");
2484 free(cinfo);
2485 return 0;
2486 }
2487
2488 /* We set up the normal JPEG error routines, then override error_exit. */
2489 cinfo->err = jpeg_std_error(&(jerr->pub));
2490 jerr->pub.error_exit = sun_jpeg_error_exit;
2491 /* We need to setup our own print routines */
2492 jerr->pub.output_message = sun_jpeg_output_message;
2493 /* Now we can setjmp before every call to the library */
2494
2495 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2496 if (setjmp(jerr->setjmp_buffer)) {
2497 /* If we get here, the JPEG code has signaled an error. */
2498 char buffer[JMSG_LENGTH_MAX];
2499 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo,
2500 buffer);
2501 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2502 return 0;
2503 }
2504
2505 /* Perform library initialization */
2506 jpeg_create_compress(cinfo);
2507
2508 /* Now set up the destination */
2509 dest = malloc(sizeof(struct jpeg_destination_mgr));
2510 if (dest == NULL) {
2511 JNU_ThrowByName( env,
2512 "java/lang/OutOfMemoryError",
2513 "Initializing Writer");
2514 imageio_dispose((j_common_ptr)cinfo);
2515 return 0;
2516 }
2517
2518 dest->init_destination = imageio_init_destination;
2519 dest->empty_output_buffer = imageio_empty_output_buffer;
2520 dest->term_destination = imageio_term_destination;
2521 dest->next_output_byte = NULL;
2522 dest->free_in_buffer = 0;
2523
2524 cinfo->dest = dest;
2525
2526 /* set up the association to persist for future calls */
2527 ret = initImageioData(env, (j_common_ptr) cinfo, this);
2528 if (ret == NULL) {
2529 (*env)->ExceptionClear(env);
2530 JNU_ThrowByName( env,
2531 "java/lang/OutOfMemoryError",
2532 "Initializing Writer");
2533 imageio_dispose((j_common_ptr)cinfo);
2534 return 0;
2535 }
2536 return ptr_to_jlong(ret);
2537 }
2538
2539 JNIEXPORT void JNICALL
2540 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_setDest
2541 (JNIEnv *env,
2542 jobject this,
2543 jlong ptr) {
2544
2545 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2546 j_compress_ptr cinfo;
2547
2548 if (data == NULL) {
2549 JNU_ThrowByName(env,
2550 "java/lang/IllegalStateException",
2551 "Attempting to use writer after dispose()");
2552 return;
2553 }
2554
2555 cinfo = (j_compress_ptr) data->jpegObj;
2556
2557 imageio_set_stream(env, data->jpegObj, data, this);
2558
2559
2560 // Don't call the init method, as that depends on pinned arrays
2561 cinfo->dest->next_output_byte = NULL;
2562 cinfo->dest->free_in_buffer = 0;
2563 }
2564
2565 JNIEXPORT void JNICALL
2566 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeTables
2567 (JNIEnv *env,
2568 jobject this,
2569 jlong ptr,
2570 jobjectArray qtables,
2571 jobjectArray DCHuffmanTables,
2572 jobjectArray ACHuffmanTables) {
2573
2574 struct jpeg_destination_mgr *dest;
2575 sun_jpeg_error_ptr jerr;
2576 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2577 j_compress_ptr cinfo;
2578
2579 if (data == NULL) {
2580 JNU_ThrowByName(env,
2581 "java/lang/IllegalStateException",
2582 "Attempting to use writer after dispose()");
2583 return;
2584 }
2585
2586 cinfo = (j_compress_ptr) data->jpegObj;
2587 dest = cinfo->dest;
2588
2589 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2590 jerr = (sun_jpeg_error_ptr) cinfo->err;
2591
2592 if (setjmp(jerr->setjmp_buffer)) {
2593 /* If we get here, the JPEG code has signaled an error
2594 while writing. */
2595 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2596 if (!(*env)->ExceptionOccurred(env)) {
2597 char buffer[JMSG_LENGTH_MAX];
2598 (*cinfo->err->format_message) ((j_common_ptr) cinfo,
2599 buffer);
2600 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2601 }
2602 return;
2603 }
2604
2605 if (GET_ARRAYS(env, data,
2606 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) {
2607 (*env)->ExceptionClear(env);
2608 JNU_ThrowByName(env,
2609 "javax/imageio/IIOException",
2610 "Array pin failed");
2611 return;
2612 }
2613
2614 jpeg_suppress_tables(cinfo, TRUE); // Suppress writing of any current
2615
2616 data->streamBuf.suspendable = FALSE;
2617 if (qtables != NULL) {
2618 #ifdef DEBUG_IIO_JPEG
2619 printf("in writeTables: qtables not NULL\n");
2620 #endif
2621 setQTables(env, (j_common_ptr) cinfo, qtables, TRUE);
2622 }
2623
2624 if (DCHuffmanTables != NULL) {
2625 setHTables(env, (j_common_ptr) cinfo,
2626 DCHuffmanTables, ACHuffmanTables, TRUE);
2627 }
2628
2629 jpeg_write_tables(cinfo); // Flushes the buffer for you
2630 RELEASE_ARRAYS(env, data, NULL);
2631 }
2632
2633 JNIEXPORT jboolean JNICALL
2634 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeImage
2635 (JNIEnv *env,
2636 jobject this,
2637 jlong ptr,
2638 jbyteArray buffer,
2639 jint inCs, jint outCs,
2640 jint numBands,
2641 jintArray bandSizes,
2642 jint srcWidth,
2643 jint destWidth, jint destHeight,
2644 jint stepX, jint stepY,
2645 jobjectArray qtables,
2646 jboolean writeDQT,
2647 jobjectArray DCHuffmanTables,
2648 jobjectArray ACHuffmanTables,
2649 jboolean writeDHT,
2650 jboolean optimize,
2651 jboolean progressive,
2652 jint numScans,
2653 jintArray scanInfo,
2654 jintArray componentIds,
2655 jintArray HsamplingFactors,
2656 jintArray VsamplingFactors,
2657 jintArray QtableSelectors,
2658 jboolean haveMetadata,
2659 jint restartInterval) {
2660
2661 struct jpeg_destination_mgr *dest;
2662 JSAMPROW scanLinePtr;
2663 int i, j;
2664 int pixelStride;
2665 unsigned char *in, *out, *pixelLimit, *scanLineLimit;
2666 unsigned int scanLineSize, pixelBufferSize;
2667 int targetLine;
2668 pixelBufferPtr pb;
2669 sun_jpeg_error_ptr jerr;
2670 jint *ids, *hfactors, *vfactors, *qsels;
2671 jsize qlen, hlen;
2672 int *scanptr;
2673 jint *scanData;
2674 jint *bandSize;
2675 int maxBandValue, halfMaxBandValue;
2676 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
2677 j_compress_ptr cinfo;
2678 UINT8** scale = NULL;
2679 boolean success = TRUE;
2680
2681
2682 /* verify the inputs */
2683
2684 if (data == NULL) {
2685 JNU_ThrowByName(env,
2686 "java/lang/IllegalStateException",
2687 "Attempting to use writer after dispose()");
2688 return JNI_FALSE;
2689 }
2690
2691 if ((buffer == NULL) ||
2692 (qtables == NULL) ||
2693 // H tables can be null if optimizing
2694 (componentIds == NULL) ||
2695 (HsamplingFactors == NULL) || (VsamplingFactors == NULL) ||
2696 (QtableSelectors == NULL) ||
2697 ((numScans != 0) && (scanInfo != NULL))) {
2698
2699 JNU_ThrowNullPointerException(env, 0);
2700 return JNI_FALSE;
2701
2702 }
2703
2704 scanLineSize = destWidth * numBands;
2705 if ((inCs < 0) || (inCs > JCS_YCCK) ||
2706 (outCs < 0) || (outCs > JCS_YCCK) ||
2707 (numBands < 1) || (numBands > MAX_BANDS) ||
2708 (srcWidth < 0) ||
2709 (destWidth < 0) || (destWidth > srcWidth) ||
2710 (destHeight < 0) ||
2711 (stepX < 0) || (stepY < 0) ||
2712 ((INT_MAX / numBands) < destWidth)) /* destWidth causes an integer overflow */
2713 {
2714 JNU_ThrowByName(env, "javax/imageio/IIOException",
2715 "Invalid argument to native writeImage");
2716 return JNI_FALSE;
2717 }
2718
2719 if (stepX > srcWidth) {
2720 stepX = srcWidth;
2721 }
2722
2723 bandSize = (*env)->GetIntArrayElements(env, bandSizes, NULL);
2724 CHECK_NULL_RETURN(bandSize, JNI_FALSE);
2725
2726 for (i = 0; i < numBands; i++) {
2727 if (bandSize[i] <= 0 || bandSize[i] > JPEG_BAND_SIZE) {
2728 (*env)->ReleaseIntArrayElements(env, bandSizes,
2729 bandSize, JNI_ABORT);
2730 JNU_ThrowByName(env, "javax/imageio/IIOException", "Invalid Image");
2731 return JNI_FALSE;
2732 }
2733 }
2734
2735 for (i = 0; i < numBands; i++) {
2736 if (bandSize[i] != JPEG_BAND_SIZE) {
2737 if (scale == NULL) {
2738 scale = (UINT8**) calloc(numBands, sizeof(UINT8*));
2739
2740 if (scale == NULL) {
2741 JNU_ThrowByName( env, "java/lang/OutOfMemoryError",
2742 "Writing JPEG Stream");
2743 return JNI_FALSE;
2744 }
2745 }
2746
2747 maxBandValue = (1 << bandSize[i]) - 1;
2748
2749 scale[i] = (UINT8*) malloc((maxBandValue + 1) * sizeof(UINT8));
2750
2751 if (scale[i] == NULL) {
2752 // Cleanup before throwing an out of memory exception
2753 for (j = 0; j < i; j++) {
2754 free(scale[j]);
2755 }
2756 free(scale);
2757 JNU_ThrowByName( env, "java/lang/OutOfMemoryError",
2758 "Writing JPEG Stream");
2759 return JNI_FALSE;
2760 }
2761
2762 halfMaxBandValue = maxBandValue >> 1;
2763
2764 for (j = 0; j <= maxBandValue; j++) {
2765 scale[i][j] = (UINT8)
2766 ((j*MAX_JPEG_BAND_VALUE + halfMaxBandValue)/maxBandValue);
2767 }
2768 }
2769 }
2770
2771 (*env)->ReleaseIntArrayElements(env, bandSizes,
2772 bandSize, JNI_ABORT);
2773
2774 cinfo = (j_compress_ptr) data->jpegObj;
2775 dest = cinfo->dest;
2776
2777 /* Set the buffer as our PixelBuffer */
2778 pb = &data->pixelBuf;
2779
2780 if (setPixelBuffer(env, pb, buffer) == NOT_OK) {
2781 if (scale != NULL) {
2782 for (i = 0; i < numBands; i++) {
2783 if (scale[i] != NULL) {
2784 free(scale[i]);
2785 }
2786 }
2787 free(scale);
2788 }
2789 return data->abortFlag; // We already threw an out of memory exception
2790 }
2791
2792 // Allocate a 1-scanline buffer
2793 scanLinePtr = (JSAMPROW)malloc(scanLineSize);
2794 if (scanLinePtr == NULL) {
2795 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2796 JNU_ThrowByName( env,
2797 "java/lang/OutOfMemoryError",
2798 "Writing JPEG Stream");
2799 return data->abortFlag;
2800 }
2801 scanLineLimit = scanLinePtr + scanLineSize;
2802
2803 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */
2804 jerr = (sun_jpeg_error_ptr) cinfo->err;
2805
2806 if (setjmp(jerr->setjmp_buffer)) {
2807 /* If we get here, the JPEG code has signaled an error
2808 while writing. */
2809 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2810 if (!(*env)->ExceptionOccurred(env)) {
2811 char buffer[JMSG_LENGTH_MAX];
2812 (*cinfo->err->format_message) ((j_common_ptr) cinfo,
2813 buffer);
2814 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer);
2815 }
2816
2817 if (scale != NULL) {
2818 for (i = 0; i < numBands; i++) {
2819 if (scale[i] != NULL) {
2820 free(scale[i]);
2821 }
2822 }
2823 free(scale);
2824 }
2825
2826 free(scanLinePtr);
2827 return data->abortFlag;
2828 }
2829
2830 // set up parameters
2831 cinfo->image_width = destWidth;
2832 cinfo->image_height = destHeight;
2833 cinfo->input_components = numBands;
2834 cinfo->in_color_space = inCs;
2835
2836 jpeg_set_defaults(cinfo);
2837
2838 jpeg_set_colorspace(cinfo, outCs);
2839
2840 cinfo->optimize_coding = optimize;
2841
2842 cinfo->write_JFIF_header = FALSE;
2843 cinfo->write_Adobe_marker = FALSE;
2844 // copy componentIds
2845 ids = (*env)->GetIntArrayElements(env, componentIds, NULL);
2846 hfactors = (*env)->GetIntArrayElements(env, HsamplingFactors, NULL);
2847 vfactors = (*env)->GetIntArrayElements(env, VsamplingFactors, NULL);
2848 qsels = (*env)->GetIntArrayElements(env, QtableSelectors, NULL);
2849
2850 if (ids && hfactors && vfactors && qsels) {
2851 for (i = 0; i < numBands; i++) {
2852 cinfo->comp_info[i].component_id = ids[i];
2853 cinfo->comp_info[i].h_samp_factor = hfactors[i];
2854 cinfo->comp_info[i].v_samp_factor = vfactors[i];
2855 cinfo->comp_info[i].quant_tbl_no = qsels[i];
2856 }
2857 } else {
2858 success = FALSE;
2859 }
2860
2861 if (ids) {
2862 (*env)->ReleaseIntArrayElements(env, componentIds, ids, JNI_ABORT);
2863 }
2864 if (hfactors) {
2865 (*env)->ReleaseIntArrayElements(env, HsamplingFactors, hfactors, JNI_ABORT);
2866 }
2867 if (vfactors) {
2868 (*env)->ReleaseIntArrayElements(env, VsamplingFactors, vfactors, JNI_ABORT);
2869 }
2870 if (qsels) {
2871 (*env)->ReleaseIntArrayElements(env, QtableSelectors, qsels, JNI_ABORT);
2872 }
2873 if (!success) return data->abortFlag;
2874
2875 jpeg_suppress_tables(cinfo, TRUE); // Disable writing any current
2876
2877 qlen = setQTables(env, (j_common_ptr) cinfo, qtables, writeDQT);
2878
2879 if (!optimize) {
2880 // Set the h tables
2881 hlen = setHTables(env,
2882 (j_common_ptr) cinfo,
2883 DCHuffmanTables,
2884 ACHuffmanTables,
2885 writeDHT);
2886 }
2887
2888 if (GET_ARRAYS(env, data,
2889 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) {
2890 (*env)->ExceptionClear(env);
2891 JNU_ThrowByName(env,
2892 "javax/imageio/IIOException",
2893 "Array pin failed");
2894 return data->abortFlag;
2895 }
2896
2897 data->streamBuf.suspendable = FALSE;
2898
2899 if (progressive) {
2900 if (numScans == 0) { // then use default scans
2901 jpeg_simple_progression(cinfo);
2902 } else {
2903 cinfo->num_scans = numScans;
2904 // Copy the scanInfo to a local array
2905 // The following is copied from jpeg_simple_progression:
2906 /* Allocate space for script.
2907 * We need to put it in the permanent pool in case the application performs
2908 * multiple compressions without changing the settings. To avoid a memory
2909 * leak if jpeg_simple_progression is called repeatedly for the same JPEG
2910 * object, we try to re-use previously allocated space, and we allocate
2911 * enough space to handle YCbCr even if initially asked for grayscale.
2912 */
2913 if (cinfo->script_space == NULL
2914 || cinfo->script_space_size < numScans) {
2915 cinfo->script_space_size = MAX(numScans, 10);
2916 cinfo->script_space = (jpeg_scan_info *)
2917 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo,
2918 JPOOL_PERMANENT,
2919 cinfo->script_space_size
2920 * sizeof(jpeg_scan_info));
2921 }
2922 cinfo->scan_info = cinfo->script_space;
2923 scanptr = (int *) cinfo->script_space;
2924 scanData = (*env)->GetIntArrayElements(env, scanInfo, NULL);
2925 CHECK_NULL_RETURN(scanData, data->abortFlag);
2926 // number of jints per scan is 9
2927 // We avoid a memcpy to handle different size ints
2928 for (i = 0; i < numScans*9; i++) {
2929 scanptr[i] = scanData[i];
2930 }
2931 (*env)->ReleaseIntArrayElements(env, scanInfo,
2932 scanData, JNI_ABORT);
2933
2934 }
2935 }
2936
2937 cinfo->restart_interval = restartInterval;
2938
2939 #ifdef DEBUG_IIO_JPEG
2940 printf("writer setup complete, starting compressor\n");
2941 #endif
2942
2943 // start the compressor; tables must already be set
2944 jpeg_start_compress(cinfo, FALSE); // Leaves sent_table alone
2945
2946 if (haveMetadata) {
2947 // Flush the buffer
2948 imageio_flush_destination(cinfo);
2949 // Call Java to write the metadata
2950 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2951 (*env)->CallVoidMethod(env,
2952 this,
2953 JPEGImageWriter_writeMetadataID);
2954 if ((*env)->ExceptionOccurred(env)
2955 || !GET_ARRAYS(env, data,
2956 (const JOCTET **)(&dest->next_output_byte))) {
2957 cinfo->err->error_exit((j_common_ptr) cinfo);
2958 }
2959 }
2960
2961 targetLine = 0;
2962 pixelBufferSize = srcWidth * numBands;
2963 pixelStride = numBands * stepX;
2964
2965 // for each line in destHeight
2966 while ((data->abortFlag == JNI_FALSE)
2967 && (cinfo->next_scanline < cinfo->image_height)) {
2968 // get the line from Java
2969 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte));
2970 (*env)->CallVoidMethod(env,
2971 this,
2972 JPEGImageWriter_grabPixelsID,
2973 targetLine);
2974 if ((*env)->ExceptionOccurred(env)
2975 || !GET_ARRAYS(env, data,
2976 (const JOCTET **)(&dest->next_output_byte))) {
2977 cinfo->err->error_exit((j_common_ptr) cinfo);
2978 }
2979
2980 // subsample it into our buffer
2981
2982 in = data->pixelBuf.buf.bp;
2983 out = scanLinePtr;
2984 pixelLimit = in + ((pixelBufferSize > data->pixelBuf.byteBufferLength) ?
2985 data->pixelBuf.byteBufferLength : pixelBufferSize);
2986 for (; (in < pixelLimit) && (out < scanLineLimit); in += pixelStride) {
2987 for (i = 0; i < numBands; i++) {
2988 if (scale !=NULL && scale[i] != NULL) {
2989 *out++ = scale[i][*(in+i)];
2990 #ifdef DEBUG_IIO_JPEG
2991 if (in == data->pixelBuf.buf.bp){ // Just the first pixel
2992 printf("in %d -> out %d, ", *(in+i), *(out-i-1));
2993 }
2994 #endif
2995
2996 #ifdef DEBUG_IIO_JPEG
2997 if (in == data->pixelBuf.buf.bp){ // Just the first pixel
2998 printf("\n");
2999 }
3000 #endif
3001 } else {
3002 *out++ = *(in+i);
3003 }
3004 }
3005 }
3006 // write it out
3007 jpeg_write_scanlines(cinfo, (JSAMPARRAY)&scanLinePtr, 1);
3008 targetLine += stepY;
3009 }
3010
3011 /*
3012 * We are done, but we might not have done all the lines,
3013 * so use jpeg_abort instead of jpeg_finish_compress.
3014 */
3015 if (cinfo->next_scanline == cinfo->image_height) {
3016 jpeg_finish_compress(cinfo); // Flushes buffer with term_dest
3017 } else {
3018 jpeg_abort((j_common_ptr)cinfo);
3019 }
3020
3021 if (scale != NULL) {
3022 for (i = 0; i < numBands; i++) {
3023 if (scale[i] != NULL) {
3024 free(scale[i]);
3025 }
3026 }
3027 free(scale);
3028 }
3029
3030 free(scanLinePtr);
3031 RELEASE_ARRAYS(env, data, NULL);
3032 return data->abortFlag;
3033 }
3034
3035 JNIEXPORT void JNICALL
3036 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_abortWrite
3037 (JNIEnv *env,
3038 jobject this,
3039 jlong ptr) {
3040
3041 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3042
3043 if (data == NULL) {
3044 JNU_ThrowByName(env,
3045 "java/lang/IllegalStateException",
3046 "Attempting to use writer after dispose()");
3047 return;
3048 }
3049
3050 imageio_abort(env, this, data);
3051 }
3052
3053 JNIEXPORT void JNICALL
3054 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_resetWriter
3055 (JNIEnv *env,
3056 jobject this,
3057 jlong ptr) {
3058 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3059 j_compress_ptr cinfo;
3060
3061 if (data == NULL) {
3062 JNU_ThrowByName(env,
3063 "java/lang/IllegalStateException",
3064 "Attempting to use writer after dispose()");
3065 return;
3066 }
3067
3068 cinfo = (j_compress_ptr) data->jpegObj;
3069
3070 imageio_reset(env, (j_common_ptr) cinfo, data);
3071
3072 /*
3073 * The tables have not been reset, and there is no way to do so
3074 * in IJG without leaking memory. The only situation in which
3075 * this will cause a problem is if an image-only stream is written
3076 * with this object without initializing the correct tables first,
3077 * which should not be possible.
3078 */
3079
3080 cinfo->dest->next_output_byte = NULL;
3081 cinfo->dest->free_in_buffer = 0;
3082 }
3083
3084 JNIEXPORT void JNICALL
3085 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_disposeWriter
3086 (JNIEnv *env,
3087 jclass writer,
3088 jlong ptr) {
3089
3090 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr);
3091 j_common_ptr info = destroyImageioData(env, data);
3092
3093 imageio_dispose(info);
3094 }