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 int cid0, cid1, cid2; 1614 jboolean retval = JNI_FALSE; 1615 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 1616 j_decompress_ptr cinfo; 1617 struct jpeg_source_mgr *src; 1618 sun_jpeg_error_ptr jerr; 1619 jbyteArray profileData = NULL; 1620 1621 if (data == NULL) { 1622 JNU_ThrowByName(env, 1623 "java/lang/IllegalStateException", 1624 "Attempting to use reader after dispose()"); 1625 return JNI_FALSE; 1626 } 1627 1628 cinfo = (j_decompress_ptr) data->jpegObj; 1629 src = cinfo->src; 1630 1631 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ 1632 jerr = (sun_jpeg_error_ptr) cinfo->err; 1633 1634 if (setjmp(jerr->setjmp_buffer)) { 1635 /* If we get here, the JPEG code has signaled an error 1636 while reading the header. */ 1637 RELEASE_ARRAYS(env, data, src->next_input_byte); 1638 if (!(*env)->ExceptionOccurred(env)) { 1639 char buffer[JMSG_LENGTH_MAX]; 1640 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, 1641 buffer); 1642 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); 1643 } 1644 return retval; 1645 } 1646 1647 #ifdef DEBUG_IIO_JPEG 1648 printf("In readImageHeader, data is %p cinfo is %p\n", data, cinfo); 1649 printf("clearFirst is %d\n", clearFirst); 1650 #endif 1651 1652 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) { 1653 (*env)->ExceptionClear(env); 1654 JNU_ThrowByName(env, 1655 "javax/imageio/IIOException", 1656 "Array pin failed"); 1657 return retval; 1658 } 1659 1660 /* 1661 * Now clear the input buffer if the Java code has done a seek 1662 * on the stream since the last call, invalidating any buffer contents. 1663 */ 1664 if (clearFirst) { 1665 clearStreamBuffer(&data->streamBuf); 1666 src->next_input_byte = NULL; 1667 src->bytes_in_buffer = 0; 1668 } 1669 1670 ret = jpeg_read_header(cinfo, FALSE); 1671 1672 if (ret == JPEG_HEADER_TABLES_ONLY) { 1673 retval = JNI_TRUE; 1674 imageio_term_source(cinfo); // Pushback remaining buffer contents 1675 #ifdef DEBUG_IIO_JPEG 1676 printf("just read tables-only image; q table 0 at %p\n", 1677 cinfo->quant_tbl_ptrs[0]); 1678 #endif 1679 RELEASE_ARRAYS(env, data, src->next_input_byte); 1680 } else { 1681 /* 1682 * Now adjust the jpeg_color_space variable, which was set in 1683 * default_decompress_parms, to reflect our differences from IJG 1684 */ 1685 1686 switch (cinfo->jpeg_color_space) { 1687 default : 1688 break; 1689 case JCS_YCbCr: 1690 1691 /* 1692 * There are several possibilities: 1693 * - we got image with embeded colorspace 1694 * Use it. User knows what he is doing. 1695 * - we got JFIF image 1696 * Must be YCbCr (see http://www.w3.org/Graphics/JPEG/jfif3.pdf, page 2) 1697 * - we got EXIF image 1698 * Must be YCbCr (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 63) 1699 * - something else 1700 * Apply heuristical rules to identify actual colorspace. 1701 */ 1702 1703 if (cinfo->saw_Adobe_marker) { 1704 if (cinfo->Adobe_transform != 1) { 1705 /* 1706 * IJG guesses this is YCbCr and emits a warning 1707 * We would rather not guess. Then the user knows 1708 * To read this as a Raster if at all 1709 */ 1710 cinfo->jpeg_color_space = JCS_UNKNOWN; 1711 cinfo->out_color_space = JCS_UNKNOWN; 1712 } 1713 } else if (!cinfo->saw_JFIF_marker && !IS_EXIF(cinfo)) { 1714 /* 1715 * In the absence of certain markers, IJG has interpreted 1716 * component id's of [1,2,3] as meaning YCbCr.We follow that 1717 * interpretation, which is additionally described in the Image 1718 * I/O JPEG metadata spec.If that condition is not met here the 1719 * next step will be to examine the subsampling factors, if 1720 * there is any difference in subsampling factors we also assume 1721 * YCbCr, only if both horizontal and vertical subsampling 1722 * is same we assume JPEG color space as RGB. 1723 * This is also described in the Image I/O JPEG metadata spec. 1724 */ 1725 h_samp0 = cinfo->comp_info[0].h_samp_factor; 1726 h_samp1 = cinfo->comp_info[1].h_samp_factor; 1727 h_samp2 = cinfo->comp_info[2].h_samp_factor; 1728 1729 v_samp0 = cinfo->comp_info[0].v_samp_factor; 1730 v_samp1 = cinfo->comp_info[1].v_samp_factor; 1731 v_samp2 = cinfo->comp_info[2].v_samp_factor; 1732 1733 cid0 = cinfo->comp_info[0].component_id; 1734 cid1 = cinfo->comp_info[1].component_id; 1735 cid2 = cinfo->comp_info[2].component_id; 1736 1737 if ((!(cid0 == 1 && cid1 == 2 && cid2 == 3)) && 1738 ((h_samp1 == h_samp0) && (h_samp2 == h_samp0) && 1739 (v_samp1 == v_samp0) && (v_samp2 == v_samp0))) 1740 { 1741 cinfo->jpeg_color_space = JCS_RGB; 1742 /* output is already RGB, so it stays the same */ 1743 } 1744 } 1745 break; 1746 #ifdef YCCALPHA 1747 case JCS_YCC: 1748 cinfo->out_color_space = JCS_YCC; 1749 break; 1750 #endif 1751 case JCS_YCCK: 1752 if ((cinfo->saw_Adobe_marker) && (cinfo->Adobe_transform != 2)) { 1753 /* 1754 * IJG guesses this is YCCK and emits a warning 1755 * We would rather not guess. Then the user knows 1756 * To read this as a Raster if at all 1757 */ 1758 cinfo->jpeg_color_space = JCS_UNKNOWN; 1759 cinfo->out_color_space = JCS_UNKNOWN; 1760 } 1761 break; 1762 case JCS_CMYK: 1763 /* 1764 * IJG assumes all unidentified 4-channels are CMYK. 1765 * We assume that only if the second two channels are 1766 * not subsampled (either horizontally or vertically). 1767 * If they are, we assume YCCK. 1768 */ 1769 h_samp0 = cinfo->comp_info[0].h_samp_factor; 1770 h_samp1 = cinfo->comp_info[1].h_samp_factor; 1771 h_samp2 = cinfo->comp_info[2].h_samp_factor; 1772 1773 v_samp0 = cinfo->comp_info[0].v_samp_factor; 1774 v_samp1 = cinfo->comp_info[1].v_samp_factor; 1775 v_samp2 = cinfo->comp_info[2].v_samp_factor; 1776 1777 if ((h_samp1 > h_samp0) && (h_samp2 > h_samp0) || 1778 (v_samp1 > v_samp0) && (v_samp2 > v_samp0)) 1779 { 1780 cinfo->jpeg_color_space = JCS_YCCK; 1781 /* Leave the output space as CMYK */ 1782 } 1783 } 1784 RELEASE_ARRAYS(env, data, src->next_input_byte); 1785 1786 /* read icc profile data */ 1787 profileData = read_icc_profile(env, cinfo); 1788 1789 if ((*env)->ExceptionCheck(env)) { 1790 return retval; 1791 } 1792 1793 (*env)->CallVoidMethod(env, this, 1794 JPEGImageReader_setImageDataID, 1795 cinfo->image_width, 1796 cinfo->image_height, 1797 cinfo->jpeg_color_space, 1798 cinfo->out_color_space, 1799 cinfo->num_components, 1800 profileData); 1801 if (reset) { 1802 jpeg_abort_decompress(cinfo); 1803 } 1804 } 1805 1806 return retval; 1807 } 1808 1809 1810 JNIEXPORT void JNICALL 1811 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setOutColorSpace 1812 (JNIEnv *env, 1813 jobject this, 1814 jlong ptr, 1815 jint code) { 1816 1817 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 1818 j_decompress_ptr cinfo; 1819 1820 if (data == NULL) { 1821 JNU_ThrowByName(env, 1822 "java/lang/IllegalStateException", 1823 "Attempting to use reader after dispose()"); 1824 return; 1825 } 1826 1827 cinfo = (j_decompress_ptr) data->jpegObj; 1828 1829 cinfo->out_color_space = code; 1830 1831 } 1832 1833 JNIEXPORT jboolean JNICALL 1834 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImage 1835 (JNIEnv *env, 1836 jobject this, 1837 jlong ptr, 1838 jbyteArray buffer, 1839 jint numBands, 1840 jintArray srcBands, 1841 jintArray bandSizes, 1842 jint sourceXStart, 1843 jint sourceYStart, 1844 jint sourceWidth, 1845 jint sourceHeight, 1846 jint stepX, 1847 jint stepY, 1848 jobjectArray qtables, 1849 jobjectArray DCHuffmanTables, 1850 jobjectArray ACHuffmanTables, 1851 jint minProgressivePass, // Counts from 0 1852 jint maxProgressivePass, 1853 jboolean wantUpdates) { 1854 1855 1856 struct jpeg_source_mgr *src; 1857 JSAMPROW scanLinePtr = NULL; 1858 jint bands[MAX_BANDS]; 1859 int i; 1860 jint *body; 1861 int scanlineLimit; 1862 int pixelStride; 1863 unsigned char *in, *out, *pixelLimit; 1864 int targetLine; 1865 int skipLines, linesLeft; 1866 pixelBufferPtr pb; 1867 sun_jpeg_error_ptr jerr; 1868 boolean done; 1869 boolean mustScale = FALSE; 1870 boolean progressive = FALSE; 1871 boolean orderedBands = TRUE; 1872 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 1873 j_decompress_ptr cinfo; 1874 size_t numBytes; 1875 1876 /* verify the inputs */ 1877 1878 if (data == NULL) { 1879 JNU_ThrowByName(env, 1880 "java/lang/IllegalStateException", 1881 "Attempting to use reader after dispose()"); 1882 return JNI_FALSE; 1883 } 1884 1885 if ((buffer == NULL) || (srcBands == NULL)) { 1886 JNU_ThrowNullPointerException(env, 0); 1887 return JNI_FALSE; 1888 } 1889 1890 cinfo = (j_decompress_ptr) data->jpegObj; 1891 1892 if ((numBands < 1) || (numBands > MAX_BANDS) || 1893 (sourceXStart < 0) || (sourceXStart >= (jint)cinfo->image_width) || 1894 (sourceYStart < 0) || (sourceYStart >= (jint)cinfo->image_height) || 1895 (sourceWidth < 1) || (sourceWidth > (jint)cinfo->image_width) || 1896 (sourceHeight < 1) || (sourceHeight > (jint)cinfo->image_height) || 1897 (stepX < 1) || (stepY < 1) || 1898 (minProgressivePass < 0) || 1899 (maxProgressivePass < minProgressivePass)) 1900 { 1901 JNU_ThrowByName(env, "javax/imageio/IIOException", 1902 "Invalid argument to native readImage"); 1903 return JNI_FALSE; 1904 } 1905 1906 if (stepX > (jint)cinfo->image_width) { 1907 stepX = cinfo->image_width; 1908 } 1909 if (stepY > (jint)cinfo->image_height) { 1910 stepY = cinfo->image_height; 1911 } 1912 1913 /* 1914 * First get the source bands array and copy it to our local array 1915 * so we don't have to worry about pinning and unpinning it again. 1916 */ 1917 1918 body = (*env)->GetIntArrayElements(env, srcBands, NULL); 1919 if (body == NULL) { 1920 (*env)->ExceptionClear(env); 1921 JNU_ThrowByName( env, 1922 "java/lang/OutOfMemoryError", 1923 "Initializing Read"); 1924 return JNI_FALSE; 1925 } 1926 1927 for (i = 0; i < numBands; i++) { 1928 bands[i] = body[i]; 1929 if (orderedBands && (bands[i] != i)) { 1930 orderedBands = FALSE; 1931 } 1932 } 1933 1934 (*env)->ReleaseIntArrayElements(env, srcBands, body, JNI_ABORT); 1935 1936 #ifdef DEBUG_IIO_JPEG 1937 printf("---- in reader.read ----\n"); 1938 printf("numBands is %d\n", numBands); 1939 printf("bands array: "); 1940 for (i = 0; i < numBands; i++) { 1941 printf("%d ", bands[i]); 1942 } 1943 printf("\n"); 1944 printf("jq table 0 at %p\n", 1945 cinfo->quant_tbl_ptrs[0]); 1946 #endif 1947 1948 data = (imageIODataPtr) cinfo->client_data; 1949 src = cinfo->src; 1950 1951 /* Set the buffer as our PixelBuffer */ 1952 pb = &data->pixelBuf; 1953 1954 if (setPixelBuffer(env, pb, buffer) == NOT_OK) { 1955 return data->abortFlag; // We already threw an out of memory exception 1956 } 1957 1958 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ 1959 jerr = (sun_jpeg_error_ptr) cinfo->err; 1960 1961 if (setjmp(jerr->setjmp_buffer)) { 1962 /* If we get here, the JPEG code has signaled an error 1963 while reading. */ 1964 RELEASE_ARRAYS(env, data, src->next_input_byte); 1965 if (!(*env)->ExceptionOccurred(env)) { 1966 char buffer[JMSG_LENGTH_MAX]; 1967 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, 1968 buffer); 1969 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); 1970 } 1971 if (scanLinePtr != NULL) { 1972 free(scanLinePtr); 1973 scanLinePtr = NULL; 1974 } 1975 return data->abortFlag; 1976 } 1977 1978 if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) { 1979 (*env)->ExceptionClear(env); 1980 JNU_ThrowByName(env, 1981 "javax/imageio/IIOException", 1982 "Array pin failed"); 1983 return data->abortFlag; 1984 } 1985 1986 // If there are no tables in our structure and table arguments aren't 1987 // NULL, use the table arguments. 1988 if ((qtables != NULL) && (cinfo->quant_tbl_ptrs[0] == NULL)) { 1989 (void) setQTables(env, (j_common_ptr) cinfo, qtables, TRUE); 1990 } 1991 1992 if ((DCHuffmanTables != NULL) && (cinfo->dc_huff_tbl_ptrs[0] == NULL)) { 1993 setHTables(env, (j_common_ptr) cinfo, 1994 DCHuffmanTables, 1995 ACHuffmanTables, 1996 TRUE); 1997 } 1998 1999 progressive = jpeg_has_multiple_scans(cinfo); 2000 if (progressive) { 2001 cinfo->buffered_image = TRUE; 2002 cinfo->input_scan_number = minProgressivePass+1; // Java count from 0 2003 #define MAX_JAVA_INT 2147483647 // XXX Is this defined in JNI somewhere? 2004 if (maxProgressivePass < MAX_JAVA_INT) { 2005 maxProgressivePass++; // For testing 2006 } 2007 } 2008 2009 data->streamBuf.suspendable = FALSE; 2010 2011 jpeg_start_decompress(cinfo); 2012 2013 if (numBands != cinfo->output_components) { 2014 JNU_ThrowByName(env, "javax/imageio/IIOException", 2015 "Invalid argument to native readImage"); 2016 return data->abortFlag; 2017 } 2018 2019 if (cinfo->output_components <= 0 || 2020 cinfo->image_width > (0xffffffffu / (unsigned int)cinfo->output_components)) 2021 { 2022 JNU_ThrowByName(env, "javax/imageio/IIOException", 2023 "Invalid number of output components"); 2024 return data->abortFlag; 2025 } 2026 2027 // Allocate a 1-scanline buffer 2028 scanLinePtr = (JSAMPROW)malloc(cinfo->image_width*cinfo->output_components); 2029 if (scanLinePtr == NULL) { 2030 RELEASE_ARRAYS(env, data, src->next_input_byte); 2031 JNU_ThrowByName( env, 2032 "java/lang/OutOfMemoryError", 2033 "Reading JPEG Stream"); 2034 return data->abortFlag; 2035 } 2036 2037 // loop over progressive passes 2038 done = FALSE; 2039 while (!done) { 2040 if (progressive) { 2041 // initialize the next pass. Note that this skips up to 2042 // the first interesting pass. 2043 jpeg_start_output(cinfo, cinfo->input_scan_number); 2044 if (wantUpdates) { 2045 (*env)->CallVoidMethod(env, this, 2046 JPEGImageReader_passStartedID, 2047 cinfo->input_scan_number-1); 2048 } 2049 } else if (wantUpdates) { 2050 (*env)->CallVoidMethod(env, this, 2051 JPEGImageReader_passStartedID, 2052 0); 2053 2054 } 2055 2056 // Skip until the first interesting line 2057 while ((data->abortFlag == JNI_FALSE) 2058 && ((jint)cinfo->output_scanline < sourceYStart)) { 2059 jpeg_read_scanlines(cinfo, &scanLinePtr, 1); 2060 } 2061 2062 scanlineLimit = sourceYStart+sourceHeight; 2063 pixelLimit = scanLinePtr 2064 +(sourceXStart+sourceWidth)*cinfo->output_components; 2065 2066 pixelStride = stepX*cinfo->output_components; 2067 targetLine = 0; 2068 2069 while ((data->abortFlag == JNI_FALSE) 2070 && ((jint)cinfo->output_scanline < scanlineLimit)) { 2071 2072 jpeg_read_scanlines(cinfo, &scanLinePtr, 1); 2073 2074 // Now mangle it into our buffer 2075 out = data->pixelBuf.buf.bp; 2076 2077 if (orderedBands && (pixelStride == numBands)) { 2078 // Optimization: The component bands are ordered sequentially, 2079 // so we can simply use memcpy() to copy the intermediate 2080 // scanline buffer into the raster. 2081 in = scanLinePtr + (sourceXStart * cinfo->output_components); 2082 if (pixelLimit > in) { 2083 numBytes = pixelLimit - in; 2084 if (numBytes > data->pixelBuf.byteBufferLength) { 2085 numBytes = data->pixelBuf.byteBufferLength; 2086 } 2087 memcpy(out, in, numBytes); 2088 } 2089 } else { 2090 numBytes = numBands; 2091 for (in = scanLinePtr+sourceXStart*cinfo->output_components; 2092 in < pixelLimit && 2093 numBytes <= data->pixelBuf.byteBufferLength; 2094 in += pixelStride) { 2095 for (i = 0; i < numBands; i++) { 2096 *out++ = *(in+bands[i]); 2097 } 2098 numBytes += numBands; 2099 } 2100 } 2101 2102 // And call it back to Java 2103 RELEASE_ARRAYS(env, data, src->next_input_byte); 2104 (*env)->CallVoidMethod(env, 2105 this, 2106 JPEGImageReader_acceptPixelsID, 2107 targetLine++, 2108 progressive); 2109 2110 if ((*env)->ExceptionOccurred(env) 2111 || !GET_ARRAYS(env, data, &(src->next_input_byte))) { 2112 cinfo->err->error_exit((j_common_ptr) cinfo); 2113 } 2114 2115 // And skip over uninteresting lines to the next subsampled line 2116 // Ensure we don't go past the end of the image 2117 2118 // Lines to skip based on subsampling 2119 skipLines = stepY - 1; 2120 // Lines left in the image 2121 linesLeft = scanlineLimit - cinfo->output_scanline; 2122 // Take the minimum 2123 if (skipLines > linesLeft) { 2124 skipLines = linesLeft; 2125 } 2126 for(i = 0; i < skipLines; i++) { 2127 jpeg_read_scanlines(cinfo, &scanLinePtr, 1); 2128 } 2129 } 2130 if (progressive) { 2131 jpeg_finish_output(cinfo); // Increments pass counter 2132 // Call Java to notify pass complete 2133 if (jpeg_input_complete(cinfo) 2134 || (cinfo->input_scan_number > maxProgressivePass)) { 2135 done = TRUE; 2136 } 2137 } else { 2138 done = TRUE; 2139 } 2140 if (wantUpdates) { 2141 (*env)->CallVoidMethod(env, this, 2142 JPEGImageReader_passCompleteID); 2143 } 2144 2145 } 2146 /* 2147 * We are done, but we might not have read all the lines, or all 2148 * the passes, so use jpeg_abort instead of jpeg_finish_decompress. 2149 */ 2150 if (cinfo->output_scanline == cinfo->output_height) { 2151 // if ((cinfo->output_scanline == cinfo->output_height) && 2152 //(jpeg_input_complete(cinfo))) { // We read the whole file 2153 jpeg_finish_decompress(cinfo); 2154 } else { 2155 jpeg_abort_decompress(cinfo); 2156 } 2157 2158 free(scanLinePtr); 2159 2160 RELEASE_ARRAYS(env, data, src->next_input_byte); 2161 2162 return data->abortFlag; 2163 } 2164 2165 JNIEXPORT void JNICALL 2166 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_abortRead 2167 (JNIEnv *env, 2168 jobject this, 2169 jlong ptr) { 2170 2171 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2172 2173 if (data == NULL) { 2174 JNU_ThrowByName(env, 2175 "java/lang/IllegalStateException", 2176 "Attempting to use reader after dispose()"); 2177 return; 2178 } 2179 2180 imageio_abort(env, this, data); 2181 2182 } 2183 2184 JNIEXPORT void JNICALL 2185 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetLibraryState 2186 (JNIEnv *env, 2187 jobject this, 2188 jlong ptr) { 2189 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2190 j_decompress_ptr cinfo; 2191 2192 if (data == NULL) { 2193 JNU_ThrowByName(env, 2194 "java/lang/IllegalStateException", 2195 "Attempting to use reader after dispose()"); 2196 return; 2197 } 2198 2199 cinfo = (j_decompress_ptr) data->jpegObj; 2200 2201 jpeg_abort_decompress(cinfo); 2202 } 2203 2204 2205 JNIEXPORT void JNICALL 2206 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetReader 2207 (JNIEnv *env, 2208 jobject this, 2209 jlong ptr) { 2210 2211 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2212 j_decompress_ptr cinfo; 2213 sun_jpeg_error_ptr jerr; 2214 2215 if (data == NULL) { 2216 JNU_ThrowByName(env, 2217 "java/lang/IllegalStateException", 2218 "Attempting to use reader after dispose()"); 2219 return; 2220 } 2221 2222 cinfo = (j_decompress_ptr) data->jpegObj; 2223 2224 jerr = (sun_jpeg_error_ptr) cinfo->err; 2225 2226 imageio_reset(env, (j_common_ptr) cinfo, data); 2227 2228 /* 2229 * The tables have not been reset, and there is no way to do so 2230 * in IJG without leaking memory. The only situation in which 2231 * this will cause a problem is if an image-only stream is read 2232 * with this object without initializing the correct tables first. 2233 * This situation, which should cause an error, might work but 2234 * produce garbage instead. If the huffman tables are wrong, 2235 * it will fail during the decode. If the q tables are wrong, it 2236 * will look strange. This is very unlikely, so don't worry about 2237 * it. To be really robust, we would keep a flag for table state 2238 * and consult it to catch exceptional situations. 2239 */ 2240 2241 /* above does not clean up the source, so we have to */ 2242 2243 /* 2244 We need to explicitly initialize exception handler or we may 2245 longjump to random address from the term_source() 2246 */ 2247 2248 if (setjmp(jerr->setjmp_buffer)) { 2249 2250 /* 2251 We may get IOException from pushBack() here. 2252 2253 However it could be legal if original input stream was closed 2254 earlier (for example because network connection was closed). 2255 Unfortunately, image inputstream API has no way to check whether 2256 stream is already closed or IOException was thrown because of some 2257 other IO problem, 2258 And we can not avoid call to pushBack() on closed stream for the 2259 same reason. 2260 2261 So, for now we will silently eat this exception. 2262 2263 NB: this may be changed in future when ImageInputStream API will 2264 become more flexible. 2265 */ 2266 2267 if ((*env)->ExceptionOccurred(env)) { 2268 (*env)->ExceptionClear(env); 2269 } 2270 } else { 2271 cinfo->src->term_source(cinfo); 2272 } 2273 2274 cinfo->src->bytes_in_buffer = 0; 2275 cinfo->src->next_input_byte = NULL; 2276 } 2277 2278 JNIEXPORT void JNICALL 2279 Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_disposeReader 2280 (JNIEnv *env, 2281 jclass reader, 2282 jlong ptr) { 2283 2284 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2285 j_common_ptr info = destroyImageioData(env, data); 2286 2287 imageio_dispose(info); 2288 } 2289 2290 /********************** end of Reader *************************/ 2291 2292 /********************** Writer Support ************************/ 2293 2294 /********************** Destination Manager *******************/ 2295 2296 METHODDEF(void) 2297 /* 2298 * Initialize destination --- called by jpeg_start_compress 2299 * before any data is actually written. The data arrays 2300 * must be pinned before this is called. 2301 */ 2302 imageio_init_destination (j_compress_ptr cinfo) 2303 { 2304 struct jpeg_destination_mgr *dest = cinfo->dest; 2305 imageIODataPtr data = (imageIODataPtr) cinfo->client_data; 2306 streamBufferPtr sb = &data->streamBuf; 2307 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); 2308 2309 if (sb->buf == NULL) { 2310 // We forgot to pin the array 2311 (*env)->FatalError(env, "Output buffer not pinned!"); 2312 } 2313 2314 dest->next_output_byte = sb->buf; 2315 dest->free_in_buffer = sb->bufferLength; 2316 } 2317 2318 /* 2319 * Empty the output buffer --- called whenever buffer fills up. 2320 * 2321 * This routine writes the entire output buffer 2322 * (ignoring the current state of next_output_byte & free_in_buffer), 2323 * resets the pointer & count to the start of the buffer, and returns TRUE 2324 * indicating that the buffer has been dumped. 2325 */ 2326 2327 METHODDEF(boolean) 2328 imageio_empty_output_buffer (j_compress_ptr cinfo) 2329 { 2330 struct jpeg_destination_mgr *dest = cinfo->dest; 2331 imageIODataPtr data = (imageIODataPtr) cinfo->client_data; 2332 streamBufferPtr sb = &data->streamBuf; 2333 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); 2334 jobject output = NULL; 2335 2336 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2337 2338 GET_IO_REF(output); 2339 2340 (*env)->CallVoidMethod(env, 2341 output, 2342 JPEGImageWriter_writeOutputDataID, 2343 sb->hstreamBuffer, 2344 0, 2345 sb->bufferLength); 2346 if ((*env)->ExceptionOccurred(env) 2347 || !GET_ARRAYS(env, data, 2348 (const JOCTET **)(&dest->next_output_byte))) { 2349 cinfo->err->error_exit((j_common_ptr) cinfo); 2350 } 2351 2352 dest->next_output_byte = sb->buf; 2353 dest->free_in_buffer = sb->bufferLength; 2354 2355 return TRUE; 2356 } 2357 2358 /* 2359 * After all of the data has been encoded there may still be some 2360 * more left over in some of the working buffers. Now is the 2361 * time to clear them out. 2362 */ 2363 METHODDEF(void) 2364 imageio_term_destination (j_compress_ptr cinfo) 2365 { 2366 struct jpeg_destination_mgr *dest = cinfo->dest; 2367 imageIODataPtr data = (imageIODataPtr) cinfo->client_data; 2368 streamBufferPtr sb = &data->streamBuf; 2369 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); 2370 2371 /* find out how much needs to be written */ 2372 /* this conversion from size_t to jint is safe, because the lenght of the buffer is limited by jint */ 2373 jint datacount = (jint)(sb->bufferLength - dest->free_in_buffer); 2374 2375 if (datacount != 0) { 2376 jobject output = NULL; 2377 2378 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2379 2380 GET_IO_REF(output); 2381 2382 (*env)->CallVoidMethod(env, 2383 output, 2384 JPEGImageWriter_writeOutputDataID, 2385 sb->hstreamBuffer, 2386 0, 2387 datacount); 2388 2389 if ((*env)->ExceptionOccurred(env) 2390 || !GET_ARRAYS(env, data, 2391 (const JOCTET **)(&dest->next_output_byte))) { 2392 cinfo->err->error_exit((j_common_ptr) cinfo); 2393 } 2394 } 2395 2396 dest->next_output_byte = NULL; 2397 dest->free_in_buffer = 0; 2398 2399 } 2400 2401 /* 2402 * Flush the destination buffer. This is not called by the library, 2403 * but by our code below. This is the simplest implementation, though 2404 * certainly not the most efficient. 2405 */ 2406 METHODDEF(void) 2407 imageio_flush_destination(j_compress_ptr cinfo) 2408 { 2409 imageio_term_destination(cinfo); 2410 imageio_init_destination(cinfo); 2411 } 2412 2413 /********************** end of destination manager ************/ 2414 2415 /********************** Writer JNI calls **********************/ 2416 2417 2418 JNIEXPORT void JNICALL 2419 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initWriterIDs 2420 (JNIEnv *env, 2421 jclass cls, 2422 jclass qTableClass, 2423 jclass huffClass) { 2424 2425 CHECK_NULL(JPEGImageWriter_writeOutputDataID = (*env)->GetMethodID(env, 2426 cls, 2427 "writeOutputData", 2428 "([BII)V")); 2429 CHECK_NULL(JPEGImageWriter_warningOccurredID = (*env)->GetMethodID(env, 2430 cls, 2431 "warningOccurred", 2432 "(I)V")); 2433 CHECK_NULL(JPEGImageWriter_warningWithMessageID = 2434 (*env)->GetMethodID(env, 2435 cls, 2436 "warningWithMessage", 2437 "(Ljava/lang/String;)V")); 2438 CHECK_NULL(JPEGImageWriter_writeMetadataID = (*env)->GetMethodID(env, 2439 cls, 2440 "writeMetadata", 2441 "()V")); 2442 CHECK_NULL(JPEGImageWriter_grabPixelsID = (*env)->GetMethodID(env, 2443 cls, 2444 "grabPixels", 2445 "(I)V")); 2446 CHECK_NULL(JPEGQTable_tableID = (*env)->GetFieldID(env, 2447 qTableClass, 2448 "qTable", 2449 "[I")); 2450 CHECK_NULL(JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env, 2451 huffClass, 2452 "lengths", 2453 "[S")); 2454 CHECK_NULL(JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env, 2455 huffClass, 2456 "values", 2457 "[S")); 2458 } 2459 2460 JNIEXPORT jlong JNICALL 2461 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter 2462 (JNIEnv *env, 2463 jobject this) { 2464 2465 imageIODataPtr ret; 2466 struct sun_jpeg_error_mgr *jerr; 2467 struct jpeg_destination_mgr *dest; 2468 2469 /* This struct contains the JPEG compression parameters and pointers to 2470 * working space (which is allocated as needed by the JPEG library). 2471 */ 2472 struct jpeg_compress_struct *cinfo = 2473 malloc(sizeof(struct jpeg_compress_struct)); 2474 if (cinfo == NULL) { 2475 JNU_ThrowByName( env, 2476 "java/lang/OutOfMemoryError", 2477 "Initializing Writer"); 2478 return 0; 2479 } 2480 2481 /* We use our private extension JPEG error handler. 2482 */ 2483 jerr = malloc (sizeof(struct sun_jpeg_error_mgr)); 2484 if (jerr == NULL) { 2485 JNU_ThrowByName( env, 2486 "java/lang/OutOfMemoryError", 2487 "Initializing Writer"); 2488 free(cinfo); 2489 return 0; 2490 } 2491 2492 /* We set up the normal JPEG error routines, then override error_exit. */ 2493 cinfo->err = jpeg_std_error(&(jerr->pub)); 2494 jerr->pub.error_exit = sun_jpeg_error_exit; 2495 /* We need to setup our own print routines */ 2496 jerr->pub.output_message = sun_jpeg_output_message; 2497 /* Now we can setjmp before every call to the library */ 2498 2499 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ 2500 if (setjmp(jerr->setjmp_buffer)) { 2501 /* If we get here, the JPEG code has signaled an error. */ 2502 char buffer[JMSG_LENGTH_MAX]; 2503 (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, 2504 buffer); 2505 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); 2506 return 0; 2507 } 2508 2509 /* Perform library initialization */ 2510 jpeg_create_compress(cinfo); 2511 2512 /* Now set up the destination */ 2513 dest = malloc(sizeof(struct jpeg_destination_mgr)); 2514 if (dest == NULL) { 2515 JNU_ThrowByName( env, 2516 "java/lang/OutOfMemoryError", 2517 "Initializing Writer"); 2518 imageio_dispose((j_common_ptr)cinfo); 2519 return 0; 2520 } 2521 2522 dest->init_destination = imageio_init_destination; 2523 dest->empty_output_buffer = imageio_empty_output_buffer; 2524 dest->term_destination = imageio_term_destination; 2525 dest->next_output_byte = NULL; 2526 dest->free_in_buffer = 0; 2527 2528 cinfo->dest = dest; 2529 2530 /* set up the association to persist for future calls */ 2531 ret = initImageioData(env, (j_common_ptr) cinfo, this); 2532 if (ret == NULL) { 2533 (*env)->ExceptionClear(env); 2534 JNU_ThrowByName( env, 2535 "java/lang/OutOfMemoryError", 2536 "Initializing Writer"); 2537 imageio_dispose((j_common_ptr)cinfo); 2538 return 0; 2539 } 2540 return ptr_to_jlong(ret); 2541 } 2542 2543 JNIEXPORT void JNICALL 2544 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_setDest 2545 (JNIEnv *env, 2546 jobject this, 2547 jlong ptr) { 2548 2549 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2550 j_compress_ptr cinfo; 2551 2552 if (data == NULL) { 2553 JNU_ThrowByName(env, 2554 "java/lang/IllegalStateException", 2555 "Attempting to use writer after dispose()"); 2556 return; 2557 } 2558 2559 cinfo = (j_compress_ptr) data->jpegObj; 2560 2561 imageio_set_stream(env, data->jpegObj, data, this); 2562 2563 2564 // Don't call the init method, as that depends on pinned arrays 2565 cinfo->dest->next_output_byte = NULL; 2566 cinfo->dest->free_in_buffer = 0; 2567 } 2568 2569 JNIEXPORT void JNICALL 2570 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeTables 2571 (JNIEnv *env, 2572 jobject this, 2573 jlong ptr, 2574 jobjectArray qtables, 2575 jobjectArray DCHuffmanTables, 2576 jobjectArray ACHuffmanTables) { 2577 2578 struct jpeg_destination_mgr *dest; 2579 sun_jpeg_error_ptr jerr; 2580 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2581 j_compress_ptr cinfo; 2582 2583 if (data == NULL) { 2584 JNU_ThrowByName(env, 2585 "java/lang/IllegalStateException", 2586 "Attempting to use writer after dispose()"); 2587 return; 2588 } 2589 2590 cinfo = (j_compress_ptr) data->jpegObj; 2591 dest = cinfo->dest; 2592 2593 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ 2594 jerr = (sun_jpeg_error_ptr) cinfo->err; 2595 2596 if (setjmp(jerr->setjmp_buffer)) { 2597 /* If we get here, the JPEG code has signaled an error 2598 while writing. */ 2599 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2600 if (!(*env)->ExceptionOccurred(env)) { 2601 char buffer[JMSG_LENGTH_MAX]; 2602 (*cinfo->err->format_message) ((j_common_ptr) cinfo, 2603 buffer); 2604 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); 2605 } 2606 return; 2607 } 2608 2609 if (GET_ARRAYS(env, data, 2610 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) { 2611 (*env)->ExceptionClear(env); 2612 JNU_ThrowByName(env, 2613 "javax/imageio/IIOException", 2614 "Array pin failed"); 2615 return; 2616 } 2617 2618 jpeg_suppress_tables(cinfo, TRUE); // Suppress writing of any current 2619 2620 data->streamBuf.suspendable = FALSE; 2621 if (qtables != NULL) { 2622 #ifdef DEBUG_IIO_JPEG 2623 printf("in writeTables: qtables not NULL\n"); 2624 #endif 2625 setQTables(env, (j_common_ptr) cinfo, qtables, TRUE); 2626 } 2627 2628 if (DCHuffmanTables != NULL) { 2629 setHTables(env, (j_common_ptr) cinfo, 2630 DCHuffmanTables, ACHuffmanTables, TRUE); 2631 } 2632 2633 jpeg_write_tables(cinfo); // Flushes the buffer for you 2634 RELEASE_ARRAYS(env, data, NULL); 2635 } 2636 2637 static void freeArray(void** arr, jint size) { 2638 int i; 2639 if (arr != NULL) { 2640 for (i = 0; i < size; i++) { 2641 if (arr[i] != NULL) { 2642 free(arr[i]); 2643 } 2644 } 2645 free(arr); 2646 } 2647 } 2648 2649 JNIEXPORT jboolean JNICALL 2650 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeImage 2651 (JNIEnv *env, 2652 jobject this, 2653 jlong ptr, 2654 jbyteArray buffer, 2655 jint inCs, jint outCs, 2656 jint numBands, 2657 jintArray bandSizes, 2658 jint srcWidth, 2659 jint destWidth, jint destHeight, 2660 jint stepX, jint stepY, 2661 jobjectArray qtables, 2662 jboolean writeDQT, 2663 jobjectArray DCHuffmanTables, 2664 jobjectArray ACHuffmanTables, 2665 jboolean writeDHT, 2666 jboolean optimize, 2667 jboolean progressive, 2668 jint numScans, 2669 jintArray scanInfo, 2670 jintArray componentIds, 2671 jintArray HsamplingFactors, 2672 jintArray VsamplingFactors, 2673 jintArray QtableSelectors, 2674 jboolean haveMetadata, 2675 jint restartInterval) { 2676 2677 struct jpeg_destination_mgr *dest; 2678 JSAMPROW scanLinePtr; 2679 int i, j; 2680 int pixelStride; 2681 unsigned char *in, *out, *pixelLimit, *scanLineLimit; 2682 unsigned int scanLineSize, pixelBufferSize; 2683 int targetLine; 2684 pixelBufferPtr pb; 2685 sun_jpeg_error_ptr jerr; 2686 jint *ids, *hfactors, *vfactors, *qsels; 2687 jsize qlen, hlen; 2688 int *scanptr; 2689 jint *scanData; 2690 jint *bandSize; 2691 int maxBandValue, halfMaxBandValue; 2692 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 2693 j_compress_ptr cinfo; 2694 UINT8** scale = NULL; 2695 boolean success = TRUE; 2696 2697 2698 /* verify the inputs */ 2699 2700 if (data == NULL) { 2701 JNU_ThrowByName(env, 2702 "java/lang/IllegalStateException", 2703 "Attempting to use writer after dispose()"); 2704 return JNI_FALSE; 2705 } 2706 2707 if ((buffer == NULL) || 2708 (qtables == NULL) || 2709 // H tables can be null if optimizing 2710 (componentIds == NULL) || 2711 (HsamplingFactors == NULL) || (VsamplingFactors == NULL) || 2712 (QtableSelectors == NULL) || 2713 ((numScans != 0) && (scanInfo != NULL))) { 2714 2715 JNU_ThrowNullPointerException(env, 0); 2716 return JNI_FALSE; 2717 2718 } 2719 2720 scanLineSize = destWidth * numBands; 2721 if ((inCs < 0) || (inCs > JCS_YCCK) || 2722 (outCs < 0) || (outCs > JCS_YCCK) || 2723 (numBands < 1) || (numBands > MAX_BANDS) || 2724 (srcWidth < 0) || 2725 (destWidth < 0) || (destWidth > srcWidth) || 2726 (destHeight < 0) || 2727 (stepX < 0) || (stepY < 0) || 2728 ((INT_MAX / numBands) < destWidth)) /* destWidth causes an integer overflow */ 2729 { 2730 JNU_ThrowByName(env, "javax/imageio/IIOException", 2731 "Invalid argument to native writeImage"); 2732 return JNI_FALSE; 2733 } 2734 2735 if (stepX > srcWidth) { 2736 stepX = srcWidth; 2737 } 2738 2739 bandSize = (*env)->GetIntArrayElements(env, bandSizes, NULL); 2740 CHECK_NULL_RETURN(bandSize, JNI_FALSE); 2741 2742 for (i = 0; i < numBands; i++) { 2743 if (bandSize[i] <= 0 || bandSize[i] > JPEG_BAND_SIZE) { 2744 (*env)->ReleaseIntArrayElements(env, bandSizes, 2745 bandSize, JNI_ABORT); 2746 JNU_ThrowByName(env, "javax/imageio/IIOException", "Invalid Image"); 2747 return JNI_FALSE; 2748 } 2749 } 2750 2751 for (i = 0; i < numBands; i++) { 2752 if (bandSize[i] != JPEG_BAND_SIZE) { 2753 if (scale == NULL) { 2754 scale = (UINT8**) calloc(numBands, sizeof(UINT8*)); 2755 2756 if (scale == NULL) { 2757 (*env)->ReleaseIntArrayElements(env, bandSizes, 2758 bandSize, JNI_ABORT); 2759 JNU_ThrowByName( env, "java/lang/OutOfMemoryError", 2760 "Writing JPEG Stream"); 2761 return JNI_FALSE; 2762 } 2763 } 2764 2765 maxBandValue = (1 << bandSize[i]) - 1; 2766 2767 scale[i] = (UINT8*) malloc((maxBandValue + 1) * sizeof(UINT8)); 2768 2769 if (scale[i] == NULL) { 2770 // Cleanup before throwing an out of memory exception 2771 for (j = 0; j < i; j++) { 2772 free(scale[j]); 2773 } 2774 free(scale); 2775 (*env)->ReleaseIntArrayElements(env, bandSizes, 2776 bandSize, JNI_ABORT); 2777 JNU_ThrowByName( env, "java/lang/OutOfMemoryError", 2778 "Writing JPEG Stream"); 2779 return JNI_FALSE; 2780 } 2781 2782 halfMaxBandValue = maxBandValue >> 1; 2783 2784 for (j = 0; j <= maxBandValue; j++) { 2785 scale[i][j] = (UINT8) 2786 ((j*MAX_JPEG_BAND_VALUE + halfMaxBandValue)/maxBandValue); 2787 } 2788 } 2789 } 2790 2791 (*env)->ReleaseIntArrayElements(env, bandSizes, 2792 bandSize, JNI_ABORT); 2793 2794 cinfo = (j_compress_ptr) data->jpegObj; 2795 dest = cinfo->dest; 2796 2797 /* Set the buffer as our PixelBuffer */ 2798 pb = &data->pixelBuf; 2799 2800 if (setPixelBuffer(env, pb, buffer) == NOT_OK) { 2801 freeArray(scale, numBands); 2802 return data->abortFlag; // We already threw an out of memory exception 2803 } 2804 2805 // Allocate a 1-scanline buffer 2806 scanLinePtr = (JSAMPROW)malloc(scanLineSize); 2807 if (scanLinePtr == NULL) { 2808 freeArray(scale, numBands); 2809 JNU_ThrowByName( env, 2810 "java/lang/OutOfMemoryError", 2811 "Writing JPEG Stream"); 2812 return data->abortFlag; 2813 } 2814 scanLineLimit = scanLinePtr + scanLineSize; 2815 2816 /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ 2817 jerr = (sun_jpeg_error_ptr) cinfo->err; 2818 2819 if (setjmp(jerr->setjmp_buffer)) { 2820 /* If we get here, the JPEG code has signaled an error 2821 while writing. */ 2822 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2823 if (!(*env)->ExceptionOccurred(env)) { 2824 char buffer[JMSG_LENGTH_MAX]; 2825 (*cinfo->err->format_message) ((j_common_ptr) cinfo, 2826 buffer); 2827 JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); 2828 } 2829 2830 freeArray(scale, numBands); 2831 free(scanLinePtr); 2832 return data->abortFlag; 2833 } 2834 2835 // set up parameters 2836 cinfo->image_width = destWidth; 2837 cinfo->image_height = destHeight; 2838 cinfo->input_components = numBands; 2839 cinfo->in_color_space = inCs; 2840 2841 jpeg_set_defaults(cinfo); 2842 2843 jpeg_set_colorspace(cinfo, outCs); 2844 2845 cinfo->optimize_coding = optimize; 2846 2847 cinfo->write_JFIF_header = FALSE; 2848 cinfo->write_Adobe_marker = FALSE; 2849 // copy componentIds 2850 ids = (*env)->GetIntArrayElements(env, componentIds, NULL); 2851 hfactors = (*env)->GetIntArrayElements(env, HsamplingFactors, NULL); 2852 vfactors = (*env)->GetIntArrayElements(env, VsamplingFactors, NULL); 2853 qsels = (*env)->GetIntArrayElements(env, QtableSelectors, NULL); 2854 2855 if (ids && hfactors && vfactors && qsels) { 2856 for (i = 0; i < numBands; i++) { 2857 cinfo->comp_info[i].component_id = ids[i]; 2858 cinfo->comp_info[i].h_samp_factor = hfactors[i]; 2859 cinfo->comp_info[i].v_samp_factor = vfactors[i]; 2860 cinfo->comp_info[i].quant_tbl_no = qsels[i]; 2861 } 2862 } else { 2863 success = FALSE; 2864 } 2865 2866 if (ids) { 2867 (*env)->ReleaseIntArrayElements(env, componentIds, ids, JNI_ABORT); 2868 } 2869 if (hfactors) { 2870 (*env)->ReleaseIntArrayElements(env, HsamplingFactors, hfactors, JNI_ABORT); 2871 } 2872 if (vfactors) { 2873 (*env)->ReleaseIntArrayElements(env, VsamplingFactors, vfactors, JNI_ABORT); 2874 } 2875 if (qsels) { 2876 (*env)->ReleaseIntArrayElements(env, QtableSelectors, qsels, JNI_ABORT); 2877 } 2878 if (!success) { 2879 freeArray(scale, numBands); 2880 free(scanLinePtr); 2881 return data->abortFlag; 2882 } 2883 2884 jpeg_suppress_tables(cinfo, TRUE); // Disable writing any current 2885 2886 qlen = setQTables(env, (j_common_ptr) cinfo, qtables, writeDQT); 2887 2888 if (!optimize) { 2889 // Set the h tables 2890 hlen = setHTables(env, 2891 (j_common_ptr) cinfo, 2892 DCHuffmanTables, 2893 ACHuffmanTables, 2894 writeDHT); 2895 } 2896 2897 if (GET_ARRAYS(env, data, 2898 (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) { 2899 (*env)->ExceptionClear(env); 2900 freeArray(scale, numBands); 2901 free(scanLinePtr); 2902 JNU_ThrowByName(env, 2903 "javax/imageio/IIOException", 2904 "Array pin failed"); 2905 return data->abortFlag; 2906 } 2907 2908 data->streamBuf.suspendable = FALSE; 2909 2910 if (progressive) { 2911 if (numScans == 0) { // then use default scans 2912 jpeg_simple_progression(cinfo); 2913 } else { 2914 cinfo->num_scans = numScans; 2915 // Copy the scanInfo to a local array 2916 // The following is copied from jpeg_simple_progression: 2917 /* Allocate space for script. 2918 * We need to put it in the permanent pool in case the application performs 2919 * multiple compressions without changing the settings. To avoid a memory 2920 * leak if jpeg_simple_progression is called repeatedly for the same JPEG 2921 * object, we try to re-use previously allocated space, and we allocate 2922 * enough space to handle YCbCr even if initially asked for grayscale. 2923 */ 2924 if (cinfo->script_space == NULL 2925 || cinfo->script_space_size < numScans) { 2926 cinfo->script_space_size = MAX(numScans, 10); 2927 cinfo->script_space = (jpeg_scan_info *) 2928 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, 2929 JPOOL_PERMANENT, 2930 cinfo->script_space_size 2931 * sizeof(jpeg_scan_info)); 2932 } 2933 cinfo->scan_info = cinfo->script_space; 2934 scanptr = (int *) cinfo->script_space; 2935 scanData = (*env)->GetIntArrayElements(env, scanInfo, NULL); 2936 if (scanData == NULL) { 2937 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2938 freeArray(scale, numBands); 2939 free(scanLinePtr); 2940 return data->abortFlag; 2941 } 2942 // number of jints per scan is 9 2943 // We avoid a memcpy to handle different size ints 2944 for (i = 0; i < numScans*9; i++) { 2945 scanptr[i] = scanData[i]; 2946 } 2947 (*env)->ReleaseIntArrayElements(env, scanInfo, 2948 scanData, JNI_ABORT); 2949 2950 } 2951 } 2952 2953 cinfo->restart_interval = restartInterval; 2954 2955 #ifdef DEBUG_IIO_JPEG 2956 printf("writer setup complete, starting compressor\n"); 2957 #endif 2958 2959 // start the compressor; tables must already be set 2960 jpeg_start_compress(cinfo, FALSE); // Leaves sent_table alone 2961 2962 if (haveMetadata) { 2963 // Flush the buffer 2964 imageio_flush_destination(cinfo); 2965 // Call Java to write the metadata 2966 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2967 (*env)->CallVoidMethod(env, 2968 this, 2969 JPEGImageWriter_writeMetadataID); 2970 if ((*env)->ExceptionOccurred(env) 2971 || !GET_ARRAYS(env, data, 2972 (const JOCTET **)(&dest->next_output_byte))) { 2973 cinfo->err->error_exit((j_common_ptr) cinfo); 2974 } 2975 } 2976 2977 targetLine = 0; 2978 pixelBufferSize = srcWidth * numBands; 2979 pixelStride = numBands * stepX; 2980 2981 // for each line in destHeight 2982 while ((data->abortFlag == JNI_FALSE) 2983 && (cinfo->next_scanline < cinfo->image_height)) { 2984 // get the line from Java 2985 RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); 2986 (*env)->CallVoidMethod(env, 2987 this, 2988 JPEGImageWriter_grabPixelsID, 2989 targetLine); 2990 if ((*env)->ExceptionOccurred(env) 2991 || !GET_ARRAYS(env, data, 2992 (const JOCTET **)(&dest->next_output_byte))) { 2993 cinfo->err->error_exit((j_common_ptr) cinfo); 2994 } 2995 2996 // subsample it into our buffer 2997 2998 in = data->pixelBuf.buf.bp; 2999 out = scanLinePtr; 3000 pixelLimit = in + ((pixelBufferSize > data->pixelBuf.byteBufferLength) ? 3001 data->pixelBuf.byteBufferLength : pixelBufferSize); 3002 for (; (in < pixelLimit) && (out < scanLineLimit); in += pixelStride) { 3003 for (i = 0; i < numBands; i++) { 3004 if (scale !=NULL && scale[i] != NULL) { 3005 *out++ = scale[i][*(in+i)]; 3006 #ifdef DEBUG_IIO_JPEG 3007 if (in == data->pixelBuf.buf.bp){ // Just the first pixel 3008 printf("in %d -> out %d, ", *(in+i), *(out-i-1)); 3009 } 3010 #endif 3011 3012 #ifdef DEBUG_IIO_JPEG 3013 if (in == data->pixelBuf.buf.bp){ // Just the first pixel 3014 printf("\n"); 3015 } 3016 #endif 3017 } else { 3018 *out++ = *(in+i); 3019 } 3020 } 3021 } 3022 // write it out 3023 jpeg_write_scanlines(cinfo, (JSAMPARRAY)&scanLinePtr, 1); 3024 targetLine += stepY; 3025 } 3026 3027 /* 3028 * We are done, but we might not have done all the lines, 3029 * so use jpeg_abort instead of jpeg_finish_compress. 3030 */ 3031 if (cinfo->next_scanline == cinfo->image_height) { 3032 jpeg_finish_compress(cinfo); // Flushes buffer with term_dest 3033 } else { 3034 jpeg_abort((j_common_ptr)cinfo); 3035 } 3036 3037 freeArray(scale, numBands); 3038 free(scanLinePtr); 3039 RELEASE_ARRAYS(env, data, NULL); 3040 return data->abortFlag; 3041 } 3042 3043 JNIEXPORT void JNICALL 3044 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_abortWrite 3045 (JNIEnv *env, 3046 jobject this, 3047 jlong ptr) { 3048 3049 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 3050 3051 if (data == NULL) { 3052 JNU_ThrowByName(env, 3053 "java/lang/IllegalStateException", 3054 "Attempting to use writer after dispose()"); 3055 return; 3056 } 3057 3058 imageio_abort(env, this, data); 3059 } 3060 3061 JNIEXPORT void JNICALL 3062 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_resetWriter 3063 (JNIEnv *env, 3064 jobject this, 3065 jlong ptr) { 3066 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 3067 j_compress_ptr cinfo; 3068 3069 if (data == NULL) { 3070 JNU_ThrowByName(env, 3071 "java/lang/IllegalStateException", 3072 "Attempting to use writer after dispose()"); 3073 return; 3074 } 3075 3076 cinfo = (j_compress_ptr) data->jpegObj; 3077 3078 imageio_reset(env, (j_common_ptr) cinfo, data); 3079 3080 /* 3081 * The tables have not been reset, and there is no way to do so 3082 * in IJG without leaking memory. The only situation in which 3083 * this will cause a problem is if an image-only stream is written 3084 * with this object without initializing the correct tables first, 3085 * which should not be possible. 3086 */ 3087 3088 cinfo->dest->next_output_byte = NULL; 3089 cinfo->dest->free_in_buffer = 0; 3090 } 3091 3092 JNIEXPORT void JNICALL 3093 Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_disposeWriter 3094 (JNIEnv *env, 3095 jclass writer, 3096 jlong ptr) { 3097 3098 imageIODataPtr data = (imageIODataPtr)jlong_to_ptr(ptr); 3099 j_common_ptr info = destroyImageioData(env, data); 3100 3101 imageio_dispose(info); 3102 }