J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | |
| 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 | /* Cached Java method ids */ |
| 60 | static jmethodID ImageInputStream_readID; |
| 61 | static jmethodID ImageInputStream_skipBytesID; |
| 62 | static jmethodID JPEGImageReader_warningOccurredID; |
| 63 | static jmethodID JPEGImageReader_warningWithMessageID; |
| 64 | static jmethodID JPEGImageReader_setImageDataID; |
| 65 | static jmethodID JPEGImageReader_acceptPixelsID; |
| 66 | static jmethodID JPEGImageReader_pushBackID; |
| 67 | static jmethodID JPEGImageReader_passStartedID; |
| 68 | static jmethodID JPEGImageReader_passCompleteID; |
| 69 | static jmethodID ImageOutputStream_writeID; |
| 70 | static jmethodID JPEGImageWriter_warningOccurredID; |
| 71 | static jmethodID JPEGImageWriter_warningWithMessageID; |
| 72 | static jmethodID JPEGImageWriter_writeMetadataID; |
| 73 | static jmethodID JPEGImageWriter_grabPixelsID; |
| 74 | static jfieldID JPEGQTable_tableID; |
| 75 | static jfieldID JPEGHuffmanTable_lengthsID; |
| 76 | static jfieldID JPEGHuffmanTable_valuesID; |
| 77 | |
| 78 | /* |
| 79 | * Defined in jpegdecoder.c. Copy code from there if and |
| 80 | * when that disappears. */ |
| 81 | extern JavaVM *jvm; |
| 82 | |
| 83 | /* |
| 84 | * The following sets of defines must match the warning messages in the |
| 85 | * Java code. |
| 86 | */ |
| 87 | |
| 88 | /* Reader warnings */ |
| 89 | #define READ_NO_EOI 0 |
| 90 | |
| 91 | /* Writer warnings */ |
| 92 | |
| 93 | /* Return codes for various ops */ |
| 94 | #define OK 1 |
| 95 | #define NOT_OK 0 |
| 96 | |
| 97 | /* |
| 98 | * First we define two objects, one for the stream and buffer and one |
| 99 | * for pixels. Both contain references to Java objects and pointers to |
| 100 | * pinned arrays. These objects can be used for either input or |
| 101 | * output. Pixels can be accessed as either INT32s or bytes. |
| 102 | * Every I/O operation will have one of each these objects, one for |
| 103 | * the stream and the other to hold pixels, regardless of the I/O direction. |
| 104 | */ |
| 105 | |
| 106 | /******************** StreamBuffer definition ************************/ |
| 107 | |
| 108 | typedef struct streamBufferStruct { |
| 109 | jobject stream; // ImageInputStream or ImageOutputStream |
| 110 | jbyteArray hstreamBuffer; // Handle to a Java buffer for the stream |
| 111 | JOCTET *buf; // Pinned buffer pointer */ |
| 112 | int bufferOffset; // holds offset between unpin and the next pin |
| 113 | int bufferLength; // Allocated, nut just used |
| 114 | int suspendable; // Set to true to suspend input |
| 115 | long remaining_skip; // Used only on input |
| 116 | } streamBuffer, *streamBufferPtr; |
| 117 | |
| 118 | /* |
| 119 | * This buffer size was set to 64K in the old classes, 4K by default in the |
| 120 | * IJG library, with the comment "an efficiently freadable size", and 1K |
| 121 | * in AWT. |
| 122 | * Unlike in the other Java designs, these objects will persist, so 64K |
| 123 | * seems too big and 1K seems too small. If 4K was good enough for the |
| 124 | * IJG folks, it's good enough for me. |
| 125 | */ |
| 126 | #define STREAMBUF_SIZE 4096 |
| 127 | |
| 128 | /* |
| 129 | * Used to signal that no data need be restored from an unpin to a pin. |
| 130 | * I.e. the buffer is empty. |
| 131 | */ |
| 132 | #define NO_DATA -1 |
| 133 | |
| 134 | // Forward reference |
| 135 | static void resetStreamBuffer(JNIEnv *env, streamBufferPtr sb); |
| 136 | |
| 137 | /* |
| 138 | * Initialize a freshly allocated StreamBuffer object. The stream is left |
| 139 | * null, as it will be set from Java by setSource, but the buffer object |
| 140 | * is created and a global reference kept. Returns OK on success, NOT_OK |
| 141 | * if allocating the buffer or getting a global reference for it failed. |
| 142 | */ |
| 143 | static int initStreamBuffer(JNIEnv *env, streamBufferPtr sb) { |
| 144 | /* Initialize a new buffer */ |
| 145 | jbyteArray hInputBuffer = (*env)->NewByteArray(env, STREAMBUF_SIZE); |
| 146 | if (hInputBuffer == NULL) { |
| 147 | JNU_ThrowByName( env, |
| 148 | "java/lang/OutOfMemoryError", |
| 149 | "Initializing Reader"); |
| 150 | return NOT_OK; |
| 151 | } |
| 152 | sb->bufferLength = (*env)->GetArrayLength(env, hInputBuffer); |
| 153 | sb->hstreamBuffer = (*env)->NewGlobalRef(env, hInputBuffer); |
| 154 | if (sb->hstreamBuffer == NULL) { |
| 155 | JNU_ThrowByName( env, |
| 156 | "java/lang/OutOfMemoryError", |
| 157 | "Initializing Reader"); |
| 158 | return NOT_OK; |
| 159 | } |
| 160 | |
| 161 | |
| 162 | sb->stream = NULL; |
| 163 | |
| 164 | sb->buf = NULL; |
| 165 | |
| 166 | resetStreamBuffer(env, sb); |
| 167 | |
| 168 | return OK; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Free all resources associated with this streamBuffer. This must |
| 173 | * be called to dispose the object to avoid leaking global references, as |
| 174 | * resetStreamBuffer does not release the buffer reference. |
| 175 | */ |
| 176 | static void destroyStreamBuffer(JNIEnv *env, streamBufferPtr sb) { |
| 177 | resetStreamBuffer(env, sb); |
| 178 | if (sb->hstreamBuffer != NULL) { |
| 179 | (*env)->DeleteGlobalRef(env, sb->hstreamBuffer); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // Forward reference |
| 184 | static void unpinStreamBuffer(JNIEnv *env, |
| 185 | streamBufferPtr sb, |
| 186 | const JOCTET *next_byte); |
| 187 | /* |
| 188 | * Resets the state of a streamBuffer object that has been in use. |
| 189 | * The global reference to the stream is released, but the reference |
| 190 | * to the buffer is retained. The buffer is unpinned if it was pinned. |
| 191 | * All other state is reset. |
| 192 | */ |
| 193 | static void resetStreamBuffer(JNIEnv *env, streamBufferPtr sb) { |
| 194 | if (sb->stream != NULL) { |
| 195 | (*env)->DeleteGlobalRef(env, sb->stream); |
| 196 | sb->stream = NULL; |
| 197 | } |
| 198 | unpinStreamBuffer(env, sb, NULL); |
| 199 | sb->bufferOffset = NO_DATA; |
| 200 | sb->suspendable = FALSE; |
| 201 | sb->remaining_skip = 0; |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * Pins the data buffer associated with this stream. Returns OK on |
| 206 | * success, NOT_OK on failure, as GetPrimitiveArrayCritical may fail. |
| 207 | */ |
| 208 | static int pinStreamBuffer(JNIEnv *env, |
| 209 | streamBufferPtr sb, |
| 210 | const JOCTET **next_byte) { |
| 211 | if (sb->hstreamBuffer != NULL) { |
| 212 | assert(sb->buf == NULL); |
| 213 | sb->buf = |
| 214 | (JOCTET *)(*env)->GetPrimitiveArrayCritical(env, |
| 215 | sb->hstreamBuffer, |
| 216 | NULL); |
| 217 | if (sb->buf == NULL) { |
| 218 | return NOT_OK; |
| 219 | } |
| 220 | if (sb->bufferOffset != NO_DATA) { |
| 221 | *next_byte = sb->buf + sb->bufferOffset; |
| 222 | } |
| 223 | } |
| 224 | return OK; |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * Unpins the data buffer associated with this stream. |
| 229 | */ |
| 230 | static void unpinStreamBuffer(JNIEnv *env, |
| 231 | streamBufferPtr sb, |
| 232 | const JOCTET *next_byte) { |
| 233 | if (sb->buf != NULL) { |
| 234 | assert(sb->hstreamBuffer != NULL); |
| 235 | if (next_byte == NULL) { |
| 236 | sb->bufferOffset = NO_DATA; |
| 237 | } else { |
| 238 | sb->bufferOffset = next_byte - sb->buf; |
| 239 | } |
| 240 | (*env)->ReleasePrimitiveArrayCritical(env, |
| 241 | sb->hstreamBuffer, |
| 242 | sb->buf, |
| 243 | 0); |
| 244 | sb->buf = NULL; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * Clear out the streamBuffer. This just invalidates the data in the buffer. |
| 250 | */ |
| 251 | static void clearStreamBuffer(streamBufferPtr sb) { |
| 252 | sb->bufferOffset = NO_DATA; |
| 253 | } |
| 254 | |
| 255 | /*************************** end StreamBuffer definition *************/ |
| 256 | |
| 257 | /*************************** Pixel Buffer definition ******************/ |
| 258 | |
| 259 | typedef struct pixelBufferStruct { |
| 260 | jobject hpixelObject; // Usually a DataBuffer bank as a byte array |
| 261 | union pixptr { |
| 262 | INT32 *ip; // Pinned buffer pointer, as 32-bit ints |
| 263 | unsigned char *bp; // Pinned buffer pointer, as bytes |
| 264 | } buf; |
| 265 | } pixelBuffer, *pixelBufferPtr; |
| 266 | |
| 267 | /* |
| 268 | * Initialize a freshly allocated PixelBuffer. All fields are simply |
| 269 | * set to NULL, as we have no idea what size buffer we will need. |
| 270 | */ |
| 271 | static void initPixelBuffer(pixelBufferPtr pb) { |
| 272 | pb->hpixelObject = NULL; |
| 273 | pb->buf.ip = NULL; |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * Set the pixelBuffer to use the given buffer, acquiring a new global |
| 278 | * reference for it. Returns OK on success, NOT_OK on failure. |
| 279 | */ |
| 280 | static int setPixelBuffer(JNIEnv *env, pixelBufferPtr pb, jobject obj) { |
| 281 | pb->hpixelObject = (*env)->NewGlobalRef(env, obj); |
| 282 | |
| 283 | if (pb->hpixelObject == NULL) { |
| 284 | JNU_ThrowByName( env, |
| 285 | "java/lang/OutOfMemoryError", |
| 286 | "Setting Pixel Buffer"); |
| 287 | return NOT_OK; |
| 288 | } |
| 289 | return OK; |
| 290 | } |
| 291 | |
| 292 | // Forward reference |
| 293 | static void unpinPixelBuffer(JNIEnv *env, pixelBufferPtr pb); |
| 294 | |
| 295 | /* |
| 296 | * Resets a pixel buffer to its initial state. Unpins any pixel buffer, |
| 297 | * releases the global reference, and resets fields to NULL. Use this |
| 298 | * method to dispose the object as well (there is no destroyPixelBuffer). |
| 299 | */ |
| 300 | static void resetPixelBuffer(JNIEnv *env, pixelBufferPtr pb) { |
| 301 | if (pb->hpixelObject != NULL) { |
| 302 | unpinPixelBuffer(env, pb); |
| 303 | (*env)->DeleteGlobalRef(env, pb->hpixelObject); |
| 304 | pb->hpixelObject = NULL; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * Pins the data buffer. Returns OK on success, NOT_OK on failure. |
| 310 | */ |
| 311 | static int pinPixelBuffer(JNIEnv *env, pixelBufferPtr pb) { |
| 312 | if (pb->hpixelObject != NULL) { |
| 313 | assert(pb->buf.ip == NULL); |
| 314 | pb->buf.bp = (unsigned char *)(*env)->GetPrimitiveArrayCritical |
| 315 | (env, pb->hpixelObject, NULL); |
| 316 | if (pb->buf.bp == NULL) { |
| 317 | return NOT_OK; |
| 318 | } |
| 319 | } |
| 320 | return OK; |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * Unpins the data buffer. |
| 325 | */ |
| 326 | static void unpinPixelBuffer(JNIEnv *env, pixelBufferPtr pb) { |
| 327 | |
| 328 | if (pb->buf.ip != NULL) { |
| 329 | assert(pb->hpixelObject != NULL); |
| 330 | (*env)->ReleasePrimitiveArrayCritical(env, |
| 331 | pb->hpixelObject, |
| 332 | pb->buf.ip, |
| 333 | 0); |
| 334 | pb->buf.ip = NULL; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | /********************* end PixelBuffer definition *******************/ |
| 339 | |
| 340 | /********************* ImageIOData definition ***********************/ |
| 341 | |
| 342 | #define MAX_BANDS 4 |
| 343 | #define JPEG_BAND_SIZE 8 |
| 344 | #define NUM_BAND_VALUES (1<<JPEG_BAND_SIZE) |
| 345 | #define MAX_JPEG_BAND_VALUE (NUM_BAND_VALUES-1) |
| 346 | #define HALF_MAX_JPEG_BAND_VALUE (MAX_JPEG_BAND_VALUE>>1) |
| 347 | |
| 348 | /* The number of possible incoming values to be scaled. */ |
| 349 | #define NUM_INPUT_VALUES (1 << 16) |
| 350 | |
| 351 | /* |
| 352 | * The principal imageioData object, opaque to I/O direction. |
| 353 | * Each JPEGImageReader will have associated with it a |
| 354 | * jpeg_decompress_struct, and similarly each JPEGImageWriter will |
| 355 | * have associated with it a jpeg_compress_struct. In order to |
| 356 | * ensure that these associations persist from one native call to |
| 357 | * the next, and to provide a central locus of imageio-specific |
| 358 | * data, we define an imageioData struct containing references |
| 359 | * to the Java object and the IJG structs. The functions |
| 360 | * that manipulate these objects know whether input or output is being |
| 361 | * performed and therefore know how to manipulate the contents correctly. |
| 362 | * If for some reason they don't, the direction can be determined by |
| 363 | * checking the is_decompressor field of the jpegObj. |
| 364 | * In order for lower level code to determine a |
| 365 | * Java object given an IJG struct, such as for dispatching warnings, |
| 366 | * we use the client_data field of the jpeg object to store a pointer |
| 367 | * to the imageIOData object. Maintenance of this pointer is performed |
| 368 | * exclusively within the following access functions. If you |
| 369 | * change that, you run the risk of dangling pointers. |
| 370 | */ |
| 371 | typedef struct imageIODataStruct { |
| 372 | j_common_ptr jpegObj; // Either struct is fine |
| 373 | jobject imageIOobj; // A JPEGImageReader or a JPEGImageWriter |
| 374 | |
| 375 | streamBuffer streamBuf; // Buffer for the stream |
| 376 | pixelBuffer pixelBuf; // Buffer for pixels |
| 377 | |
| 378 | jboolean abortFlag; // Passed down from Java abort method |
| 379 | } imageIOData, *imageIODataPtr; |
| 380 | |
| 381 | /* |
| 382 | * Allocate and initialize a new imageIOData object to associate the |
| 383 | * jpeg object and the Java object. Returns a pointer to the new object |
| 384 | * on success, NULL on failure. |
| 385 | */ |
| 386 | static imageIODataPtr initImageioData (JNIEnv *env, |
| 387 | j_common_ptr cinfo, |
| 388 | jobject obj) { |
| 389 | int i, j; |
| 390 | |
| 391 | imageIODataPtr data = (imageIODataPtr) malloc (sizeof(imageIOData)); |
| 392 | if (data == NULL) { |
| 393 | return NULL; |
| 394 | } |
| 395 | |
| 396 | data->jpegObj = cinfo; |
| 397 | cinfo->client_data = data; |
| 398 | |
| 399 | #ifdef DEBUG |
| 400 | printf("new structures: data is %p, cinfo is %p\n", data, cinfo); |
| 401 | #endif |
| 402 | |
| 403 | data->imageIOobj = (*env)->NewWeakGlobalRef(env, obj); |
| 404 | if (data->imageIOobj == NULL) { |
| 405 | free (data); |
| 406 | return NULL; |
| 407 | } |
| 408 | if (initStreamBuffer(env, &data->streamBuf) == NOT_OK) { |
| 409 | (*env)->DeleteWeakGlobalRef(env, data->imageIOobj); |
| 410 | free (data); |
| 411 | return NULL; |
| 412 | } |
| 413 | initPixelBuffer(&data->pixelBuf); |
| 414 | |
| 415 | data->abortFlag = JNI_FALSE; |
| 416 | |
| 417 | return data; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Resets the imageIOData object to its initial state, as though |
| 422 | * it had just been allocated and initialized. |
| 423 | */ |
| 424 | static void resetImageIOData(JNIEnv *env, imageIODataPtr data) { |
| 425 | resetStreamBuffer(env, &data->streamBuf); |
| 426 | resetPixelBuffer(env, &data->pixelBuf); |
| 427 | data->abortFlag = JNI_FALSE; |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * Releases all resources held by this object and its subobjects, |
| 432 | * frees the object, and returns the jpeg object. This method must |
| 433 | * be called to avoid leaking global references. |
| 434 | * Note that the jpeg object is not freed or destroyed, as that is |
| 435 | * the client's responsibility, although the client_data field is |
| 436 | * cleared. |
| 437 | */ |
| 438 | static j_common_ptr destroyImageioData(JNIEnv *env, imageIODataPtr data) { |
| 439 | j_common_ptr ret = data->jpegObj; |
| 440 | (*env)->DeleteWeakGlobalRef(env, data->imageIOobj); |
| 441 | destroyStreamBuffer(env, &data->streamBuf); |
| 442 | resetPixelBuffer(env, &data->pixelBuf); |
| 443 | ret->client_data = NULL; |
| 444 | free(data); |
| 445 | return ret; |
| 446 | } |
| 447 | |
| 448 | /******************** end ImageIOData definition ***********************/ |
| 449 | |
| 450 | /******************** Java array pinning and unpinning *****************/ |
| 451 | |
| 452 | /* We use Get/ReleasePrimitiveArrayCritical functions to avoid |
| 453 | * the need to copy array elements for the above two objects. |
| 454 | * |
| 455 | * MAKE SURE TO: |
| 456 | * |
| 457 | * - carefully insert pairs of RELEASE_ARRAYS and GET_ARRAYS around |
| 458 | * callbacks to Java. |
| 459 | * - call RELEASE_ARRAYS before returning to Java. |
| 460 | * |
| 461 | * Otherwise things will go horribly wrong. There may be memory leaks, |
| 462 | * excessive pinning, or even VM crashes! |
| 463 | * |
| 464 | * Note that GetPrimitiveArrayCritical may fail! |
| 465 | */ |
| 466 | |
| 467 | /* |
| 468 | * Release (unpin) all the arrays in use during a read. |
| 469 | */ |
| 470 | static void RELEASE_ARRAYS(JNIEnv *env, imageIODataPtr data, const JOCTET *next_byte) |
| 471 | { |
| 472 | unpinStreamBuffer(env, &data->streamBuf, next_byte); |
| 473 | |
| 474 | unpinPixelBuffer(env, &data->pixelBuf); |
| 475 | |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * Get (pin) all the arrays in use during a read. |
| 480 | */ |
| 481 | static int GET_ARRAYS(JNIEnv *env, imageIODataPtr data, const JOCTET **next_byte) { |
| 482 | if (pinStreamBuffer(env, &data->streamBuf, next_byte) == NOT_OK) { |
| 483 | return NOT_OK; |
| 484 | } |
| 485 | |
| 486 | if (pinPixelBuffer(env, &data->pixelBuf) == NOT_OK) { |
| 487 | RELEASE_ARRAYS(env, data, *next_byte); |
| 488 | return NOT_OK; |
| 489 | } |
| 490 | return OK; |
| 491 | } |
| 492 | |
| 493 | /****** end of Java array pinning and unpinning ***********/ |
| 494 | |
| 495 | /****** Error Handling *******/ |
| 496 | |
| 497 | /* |
| 498 | * Set up error handling to use setjmp/longjmp. This is the third such |
| 499 | * setup, as both the AWT jpeg decoder and the com.sun... JPEG classes |
| 500 | * setup thier own. Ultimately these should be integrated, as they all |
| 501 | * do pretty much the same thing. |
| 502 | */ |
| 503 | |
| 504 | struct sun_jpeg_error_mgr { |
| 505 | struct jpeg_error_mgr pub; /* "public" fields */ |
| 506 | |
| 507 | jmp_buf setjmp_buffer; /* for return to caller */ |
| 508 | }; |
| 509 | |
| 510 | typedef struct sun_jpeg_error_mgr * sun_jpeg_error_ptr; |
| 511 | |
| 512 | /* |
| 513 | * Here's the routine that will replace the standard error_exit method: |
| 514 | */ |
| 515 | |
| 516 | METHODDEF(void) |
| 517 | sun_jpeg_error_exit (j_common_ptr cinfo) |
| 518 | { |
| 519 | /* cinfo->err really points to a sun_jpeg_error_mgr struct */ |
| 520 | sun_jpeg_error_ptr myerr = (sun_jpeg_error_ptr) cinfo->err; |
| 521 | |
| 522 | /* For Java, we will format the message and put it in the error we throw. */ |
| 523 | |
| 524 | /* Return control to the setjmp point */ |
| 525 | longjmp(myerr->setjmp_buffer, 1); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Error Message handling |
| 530 | * |
| 531 | * This overrides the output_message method to send JPEG messages |
| 532 | * |
| 533 | */ |
| 534 | |
| 535 | METHODDEF(void) |
| 536 | sun_jpeg_output_message (j_common_ptr cinfo) |
| 537 | { |
| 538 | char buffer[JMSG_LENGTH_MAX]; |
| 539 | jstring string; |
| 540 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 541 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 542 | jobject theObject; |
| 543 | |
| 544 | /* Create the message */ |
| 545 | (*cinfo->err->format_message) (cinfo, buffer); |
| 546 | |
| 547 | // Create a new java string from the message |
| 548 | string = (*env)->NewStringUTF(env, buffer); |
| 549 | |
| 550 | theObject = data->imageIOobj; |
| 551 | |
| 552 | if (cinfo->is_decompressor) { |
| 553 | (*env)->CallVoidMethod(env, theObject, |
| 554 | JPEGImageReader_warningWithMessageID, |
| 555 | string); |
| 556 | } else { |
| 557 | (*env)->CallVoidMethod(env, theObject, |
| 558 | JPEGImageWriter_warningWithMessageID, |
| 559 | string); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | /* End of verbatim copy from jpegdecoder.c */ |
| 564 | |
| 565 | /*************** end of error handling *********************/ |
| 566 | |
| 567 | /*************** Shared utility code ***********************/ |
| 568 | |
| 569 | static void imageio_set_stream(JNIEnv *env, |
| 570 | j_common_ptr cinfo, |
| 571 | imageIODataPtr data, |
| 572 | jobject stream){ |
| 573 | streamBufferPtr sb; |
| 574 | sun_jpeg_error_ptr jerr; |
| 575 | |
| 576 | sb = &data->streamBuf; |
| 577 | |
| 578 | resetStreamBuffer(env, sb); // Removes any old stream |
| 579 | |
| 580 | /* Now we need a new global reference for the stream */ |
| 581 | if (stream != NULL) { // Fix for 4411955 |
| 582 | sb->stream = (*env)->NewGlobalRef(env, stream); |
| 583 | if (sb->stream == NULL) { |
| 584 | JNU_ThrowByName(env, |
| 585 | "java/lang/OutOfMemoryError", |
| 586 | "Setting Stream"); |
| 587 | return; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /* And finally reset state */ |
| 592 | data->abortFlag = JNI_FALSE; |
| 593 | |
| 594 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 595 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 596 | |
| 597 | if (setjmp(jerr->setjmp_buffer)) { |
| 598 | /* If we get here, the JPEG code has signaled an error |
| 599 | while aborting. */ |
| 600 | if (!(*env)->ExceptionOccurred(env)) { |
| 601 | char buffer[JMSG_LENGTH_MAX]; |
| 602 | (*cinfo->err->format_message) (cinfo, |
| 603 | buffer); |
| 604 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 605 | } |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | jpeg_abort(cinfo); // Frees any markers, but not tables |
| 610 | |
| 611 | } |
| 612 | |
| 613 | static void imageio_reset(JNIEnv *env, |
| 614 | j_common_ptr cinfo, |
| 615 | imageIODataPtr data) { |
| 616 | sun_jpeg_error_ptr jerr; |
| 617 | |
| 618 | resetImageIOData(env, data); // Mapping to jpeg object is retained. |
| 619 | |
| 620 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 621 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 622 | |
| 623 | if (setjmp(jerr->setjmp_buffer)) { |
| 624 | /* If we get here, the JPEG code has signaled an error |
| 625 | while aborting. */ |
| 626 | if (!(*env)->ExceptionOccurred(env)) { |
| 627 | char buffer[JMSG_LENGTH_MAX]; |
| 628 | (*cinfo->err->format_message) (cinfo, buffer); |
| 629 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 630 | } |
| 631 | return; |
| 632 | } |
| 633 | |
| 634 | jpeg_abort(cinfo); // Does not reset tables |
| 635 | |
| 636 | } |
| 637 | |
| 638 | static void imageio_dispose(j_common_ptr info) { |
| 639 | |
| 640 | if (info != NULL) { |
| 641 | free(info->err); |
| 642 | info->err = NULL; |
| 643 | if (info->is_decompressor) { |
| 644 | j_decompress_ptr dinfo = (j_decompress_ptr) info; |
| 645 | free(dinfo->src); |
| 646 | dinfo->src = NULL; |
| 647 | } else { |
| 648 | j_compress_ptr cinfo = (j_compress_ptr) info; |
| 649 | free(cinfo->dest); |
| 650 | cinfo->dest = NULL; |
| 651 | } |
| 652 | jpeg_destroy(info); |
| 653 | free(info); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | static void imageio_abort(JNIEnv *env, jobject this, |
| 658 | imageIODataPtr data) { |
| 659 | data->abortFlag = JNI_TRUE; |
| 660 | } |
| 661 | |
| 662 | static int setQTables(JNIEnv *env, |
| 663 | j_common_ptr cinfo, |
| 664 | jobjectArray qtables, |
| 665 | boolean write) { |
| 666 | jsize qlen; |
| 667 | jobject table; |
| 668 | jintArray qdata; |
| 669 | jint *qdataBody; |
| 670 | JQUANT_TBL *quant_ptr; |
| 671 | int i, j; |
| 672 | j_compress_ptr comp; |
| 673 | j_decompress_ptr decomp; |
| 674 | |
| 675 | qlen = (*env)->GetArrayLength(env, qtables); |
| 676 | #ifdef DEBUG |
| 677 | printf("in setQTables, qlen = %d, write is %d\n", qlen, write); |
| 678 | #endif |
| 679 | for (i = 0; i < qlen; i++) { |
| 680 | table = (*env)->GetObjectArrayElement(env, qtables, i); |
| 681 | qdata = (*env)->GetObjectField(env, table, JPEGQTable_tableID); |
| 682 | qdataBody = (*env)->GetPrimitiveArrayCritical(env, qdata, NULL); |
| 683 | |
| 684 | if (cinfo->is_decompressor) { |
| 685 | decomp = (j_decompress_ptr) cinfo; |
| 686 | if (decomp->quant_tbl_ptrs[i] == NULL) { |
| 687 | decomp->quant_tbl_ptrs[i] = |
| 688 | jpeg_alloc_quant_table(cinfo); |
| 689 | } |
| 690 | quant_ptr = decomp->quant_tbl_ptrs[i]; |
| 691 | } else { |
| 692 | comp = (j_compress_ptr) cinfo; |
| 693 | if (comp->quant_tbl_ptrs[i] == NULL) { |
| 694 | comp->quant_tbl_ptrs[i] = |
| 695 | jpeg_alloc_quant_table(cinfo); |
| 696 | } |
| 697 | quant_ptr = comp->quant_tbl_ptrs[i]; |
| 698 | } |
| 699 | |
| 700 | for (j = 0; j < 64; j++) { |
| 701 | quant_ptr->quantval[j] = (UINT16)qdataBody[j]; |
| 702 | } |
| 703 | quant_ptr->sent_table = !write; |
| 704 | (*env)->ReleasePrimitiveArrayCritical(env, |
| 705 | qdata, |
| 706 | qdataBody, |
| 707 | 0); |
| 708 | } |
| 709 | return qlen; |
| 710 | } |
| 711 | |
| 712 | static void setHuffTable(JNIEnv *env, |
| 713 | JHUFF_TBL *huff_ptr, |
| 714 | jobject table) { |
| 715 | |
| 716 | jshortArray huffLens; |
| 717 | jshortArray huffValues; |
| 718 | jshort *hlensBody, *hvalsBody; |
| 719 | jsize hlensLen, hvalsLen; |
| 720 | int i; |
| 721 | |
| 722 | // lengths |
| 723 | huffLens = (*env)->GetObjectField(env, |
| 724 | table, |
| 725 | JPEGHuffmanTable_lengthsID); |
| 726 | hlensLen = (*env)->GetArrayLength(env, huffLens); |
| 727 | hlensBody = (*env)->GetShortArrayElements(env, |
| 728 | huffLens, |
| 729 | NULL); |
| 730 | for (i = 1; i <= hlensLen; i++) { |
| 731 | huff_ptr->bits[i] = (UINT8)hlensBody[i-1]; |
| 732 | } |
| 733 | (*env)->ReleaseShortArrayElements(env, |
| 734 | huffLens, |
| 735 | hlensBody, |
| 736 | JNI_ABORT); |
| 737 | // values |
| 738 | huffValues = (*env)->GetObjectField(env, |
| 739 | table, |
| 740 | JPEGHuffmanTable_valuesID); |
| 741 | hvalsLen = (*env)->GetArrayLength(env, huffValues); |
| 742 | hvalsBody = (*env)->GetShortArrayElements(env, |
| 743 | huffValues, |
| 744 | NULL); |
| 745 | |
| 746 | for (i = 0; i < hvalsLen; i++) { |
| 747 | huff_ptr->huffval[i] = (UINT8)hvalsBody[i]; |
| 748 | } |
| 749 | (*env)->ReleaseShortArrayElements(env, |
| 750 | huffValues, |
| 751 | hvalsBody, |
| 752 | JNI_ABORT); |
| 753 | } |
| 754 | |
| 755 | static int setHTables(JNIEnv *env, |
| 756 | j_common_ptr cinfo, |
| 757 | jobjectArray DCHuffmanTables, |
| 758 | jobjectArray ACHuffmanTables, |
| 759 | boolean write) { |
| 760 | int i; |
| 761 | jobject table; |
| 762 | JHUFF_TBL *huff_ptr; |
| 763 | j_compress_ptr comp; |
| 764 | j_decompress_ptr decomp; |
| 765 | jsize hlen = (*env)->GetArrayLength(env, DCHuffmanTables); |
| 766 | for (i = 0; i < hlen; i++) { |
| 767 | if (cinfo->is_decompressor) { |
| 768 | decomp = (j_decompress_ptr) cinfo; |
| 769 | if (decomp->dc_huff_tbl_ptrs[i] == NULL) { |
| 770 | decomp->dc_huff_tbl_ptrs[i] = |
| 771 | jpeg_alloc_huff_table(cinfo); |
| 772 | } |
| 773 | huff_ptr = decomp->dc_huff_tbl_ptrs[i]; |
| 774 | } else { |
| 775 | comp = (j_compress_ptr) cinfo; |
| 776 | if (comp->dc_huff_tbl_ptrs[i] == NULL) { |
| 777 | comp->dc_huff_tbl_ptrs[i] = |
| 778 | jpeg_alloc_huff_table(cinfo); |
| 779 | } |
| 780 | huff_ptr = comp->dc_huff_tbl_ptrs[i]; |
| 781 | } |
| 782 | table = (*env)->GetObjectArrayElement(env, DCHuffmanTables, i); |
| 783 | setHuffTable(env, huff_ptr, table); |
| 784 | huff_ptr->sent_table = !write; |
| 785 | } |
| 786 | hlen = (*env)->GetArrayLength(env, ACHuffmanTables); |
| 787 | for (i = 0; i < hlen; i++) { |
| 788 | if (cinfo->is_decompressor) { |
| 789 | decomp = (j_decompress_ptr) cinfo; |
| 790 | if (decomp->ac_huff_tbl_ptrs[i] == NULL) { |
| 791 | decomp->ac_huff_tbl_ptrs[i] = |
| 792 | jpeg_alloc_huff_table(cinfo); |
| 793 | } |
| 794 | huff_ptr = decomp->ac_huff_tbl_ptrs[i]; |
| 795 | } else { |
| 796 | comp = (j_compress_ptr) cinfo; |
| 797 | if (comp->ac_huff_tbl_ptrs[i] == NULL) { |
| 798 | comp->ac_huff_tbl_ptrs[i] = |
| 799 | jpeg_alloc_huff_table(cinfo); |
| 800 | } |
| 801 | huff_ptr = comp->ac_huff_tbl_ptrs[i]; |
| 802 | } |
| 803 | table = (*env)->GetObjectArrayElement(env, ACHuffmanTables, i); |
| 804 | setHuffTable(env, huff_ptr, table); |
| 805 | huff_ptr->sent_table = !write; |
| 806 | } |
| 807 | return hlen; |
| 808 | } |
| 809 | |
| 810 | |
| 811 | /*************** end of shared utility code ****************/ |
| 812 | |
| 813 | /********************** Reader Support **************************/ |
| 814 | |
| 815 | /********************** Source Management ***********************/ |
| 816 | |
| 817 | /* |
| 818 | * INPUT HANDLING: |
| 819 | * |
| 820 | * The JPEG library's input management is defined by the jpeg_source_mgr |
| 821 | * structure which contains two fields to convey the information in the |
| 822 | * buffer and 5 methods which perform all buffer management. The library |
| 823 | * defines a standard input manager that uses stdio for obtaining compressed |
| 824 | * jpeg data, but here we need to use Java to get our data. |
| 825 | * |
| 826 | * We use the library jpeg_source_mgr but our own routines that access |
| 827 | * imageio-specific information in the imageIOData structure. |
| 828 | */ |
| 829 | |
| 830 | /* |
| 831 | * Initialize source. This is called by jpeg_read_header() before any |
| 832 | * data is actually read. Unlike init_destination(), it may leave |
| 833 | * bytes_in_buffer set to 0 (in which case a fill_input_buffer() call |
| 834 | * will occur immediately). |
| 835 | */ |
| 836 | |
| 837 | GLOBAL(void) |
| 838 | imageio_init_source(j_decompress_ptr cinfo) |
| 839 | { |
| 840 | struct jpeg_source_mgr *src = cinfo->src; |
| 841 | src->next_input_byte = NULL; |
| 842 | src->bytes_in_buffer = 0; |
| 843 | } |
| 844 | |
| 845 | /* |
| 846 | * This is called whenever bytes_in_buffer has reached zero and more |
| 847 | * data is wanted. In typical applications, it should read fresh data |
| 848 | * into the buffer (ignoring the current state of next_input_byte and |
| 849 | * bytes_in_buffer), reset the pointer & count to the start of the |
| 850 | * buffer, and return TRUE indicating that the buffer has been reloaded. |
| 851 | * It is not necessary to fill the buffer entirely, only to obtain at |
| 852 | * least one more byte. bytes_in_buffer MUST be set to a positive value |
| 853 | * if TRUE is returned. A FALSE return should only be used when I/O |
| 854 | * suspension is desired (this mode is discussed in the next section). |
| 855 | */ |
| 856 | /* |
| 857 | * Note that with I/O suspension turned on, this procedure should not |
| 858 | * do any work since the JPEG library has a very simple backtracking |
| 859 | * mechanism which relies on the fact that the buffer will be filled |
| 860 | * only when it has backed out to the top application level. When |
| 861 | * suspendable is turned on, imageio_fill_suspended_buffer will |
| 862 | * do the actual work of filling the buffer. |
| 863 | */ |
| 864 | |
| 865 | GLOBAL(boolean) |
| 866 | imageio_fill_input_buffer(j_decompress_ptr cinfo) |
| 867 | { |
| 868 | struct jpeg_source_mgr *src = cinfo->src; |
| 869 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 870 | streamBufferPtr sb = &data->streamBuf; |
| 871 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 872 | int ret; |
| 873 | |
| 874 | /* This is where input suspends */ |
| 875 | if (sb->suspendable) { |
| 876 | return FALSE; |
| 877 | } |
| 878 | |
| 879 | #ifdef DEBUG |
| 880 | printf("Filling input buffer, remaining skip is %ld, ", |
| 881 | sb->remaining_skip); |
| 882 | printf("Buffer length is %d\n", sb->bufferLength); |
| 883 | #endif |
| 884 | |
| 885 | /* |
| 886 | * Definitively skips. Could be left over if we tried to skip |
| 887 | * more than a buffer's worth but suspended when getting the next |
| 888 | * buffer. Now we aren't suspended, so we can catch up. |
| 889 | */ |
| 890 | if (sb->remaining_skip) { |
| 891 | src->skip_input_data(cinfo, 0); |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | * Now fill a complete buffer, or as much of one as the stream |
| 896 | * will give us if we are near the end. |
| 897 | */ |
| 898 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 899 | ret = (*env)->CallIntMethod(env, |
| 900 | sb->stream, |
| 901 | ImageInputStream_readID, |
| 902 | sb->hstreamBuffer, 0, |
| 903 | sb->bufferLength); |
| 904 | if ((*env)->ExceptionOccurred(env) |
| 905 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 906 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 907 | } |
| 908 | |
| 909 | #ifdef DEBUG |
| 910 | printf("Buffer filled. ret = %d\n", ret); |
| 911 | #endif |
| 912 | /* |
| 913 | * If we have reached the end of the stream, then the EOI marker |
| 914 | * is missing. We accept such streams but generate a warning. |
| 915 | * The image is likely to be corrupted, though everything through |
| 916 | * the end of the last complete MCU should be usable. |
| 917 | */ |
| 918 | if (ret <= 0) { |
| 919 | jobject reader = data->imageIOobj; |
| 920 | #ifdef DEBUG |
| 921 | printf("YO! Early EOI! ret = %d\n", ret); |
| 922 | #endif |
| 923 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 924 | (*env)->CallVoidMethod(env, reader, |
| 925 | JPEGImageReader_warningOccurredID, |
| 926 | READ_NO_EOI); |
| 927 | if ((*env)->ExceptionOccurred(env) |
| 928 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 929 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 930 | } |
| 931 | |
| 932 | sb->buf[0] = (JOCTET) 0xFF; |
| 933 | sb->buf[1] = (JOCTET) JPEG_EOI; |
| 934 | ret = 2; |
| 935 | } |
| 936 | |
| 937 | src->next_input_byte = sb->buf; |
| 938 | src->bytes_in_buffer = ret; |
| 939 | |
| 940 | return TRUE; |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * With I/O suspension turned on, the JPEG library requires that all |
| 945 | * buffer filling be done at the top application level, using this |
| 946 | * function. Due to the way that backtracking works, this procedure |
| 947 | * saves all of the data that was left in the buffer when suspension |
| 948 | * occured and read new data only at the end. |
| 949 | */ |
| 950 | |
| 951 | GLOBAL(void) |
| 952 | imageio_fill_suspended_buffer(j_decompress_ptr cinfo) |
| 953 | { |
| 954 | struct jpeg_source_mgr *src = cinfo->src; |
| 955 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 956 | streamBufferPtr sb = &data->streamBuf; |
| 957 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 958 | jint ret; |
| 959 | int offset, buflen; |
| 960 | |
| 961 | /* |
| 962 | * The original (jpegdecoder.c) had code here that called |
| 963 | * InputStream.available and just returned if the number of bytes |
| 964 | * available was less than any remaining skip. Presumably this was |
| 965 | * to avoid blocking, although the benefit was unclear, as no more |
| 966 | * decompression can take place until more data is available, so |
| 967 | * the code would block on input a little further along anyway. |
| 968 | * ImageInputStreams don't have an available method, so we'll just |
| 969 | * block in the skip if we have to. |
| 970 | */ |
| 971 | |
| 972 | if (sb->remaining_skip) { |
| 973 | src->skip_input_data(cinfo, 0); |
| 974 | } |
| 975 | |
| 976 | /* Save the data currently in the buffer */ |
| 977 | offset = src->bytes_in_buffer; |
| 978 | if (src->next_input_byte > sb->buf) { |
| 979 | memcpy(sb->buf, src->next_input_byte, offset); |
| 980 | } |
| 981 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 982 | buflen = sb->bufferLength - offset; |
| 983 | if (buflen <= 0) { |
| 984 | if (!GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 985 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 986 | } |
| 987 | return; |
| 988 | } |
| 989 | |
| 990 | ret = (*env)->CallIntMethod(env, sb->stream, |
| 991 | ImageInputStream_readID, |
| 992 | sb->hstreamBuffer, |
| 993 | offset, buflen); |
| 994 | if ((*env)->ExceptionOccurred(env) |
| 995 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 996 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 997 | } |
| 998 | /* |
| 999 | * If we have reached the end of the stream, then the EOI marker |
| 1000 | * is missing. We accept such streams but generate a warning. |
| 1001 | * The image is likely to be corrupted, though everything through |
| 1002 | * the end of the last complete MCU should be usable. |
| 1003 | */ |
| 1004 | if (ret <= 0) { |
| 1005 | jobject reader = data->imageIOobj; |
| 1006 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1007 | (*env)->CallVoidMethod(env, reader, |
| 1008 | JPEGImageReader_warningOccurredID, |
| 1009 | READ_NO_EOI); |
| 1010 | if ((*env)->ExceptionOccurred(env) |
| 1011 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 1012 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 1013 | } |
| 1014 | |
| 1015 | sb->buf[offset] = (JOCTET) 0xFF; |
| 1016 | sb->buf[offset + 1] = (JOCTET) JPEG_EOI; |
| 1017 | ret = 2; |
| 1018 | } |
| 1019 | |
| 1020 | src->next_input_byte = sb->buf; |
| 1021 | src->bytes_in_buffer = ret + offset; |
| 1022 | |
| 1023 | return; |
| 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * Skip num_bytes worth of data. The buffer pointer and count are |
| 1028 | * advanced over num_bytes input bytes, using the input stream |
| 1029 | * skipBytes method if the skip is greater than the number of bytes |
| 1030 | * in the buffer. This is used to skip over a potentially large amount of |
| 1031 | * uninteresting data (such as an APPn marker). bytes_in_buffer will be |
| 1032 | * zero on return if the skip is larger than the current contents of the |
| 1033 | * buffer. |
| 1034 | * |
| 1035 | * A negative skip count is treated as a no-op. A zero skip count |
| 1036 | * skips any remaining skip from a previous skip while suspended. |
| 1037 | * |
| 1038 | * Note that with I/O suspension turned on, this procedure does not |
| 1039 | * call skipBytes since the JPEG library has a very simple backtracking |
| 1040 | * mechanism which relies on the fact that the application level has |
| 1041 | * exclusive control over actual I/O. |
| 1042 | */ |
| 1043 | |
| 1044 | GLOBAL(void) |
| 1045 | imageio_skip_input_data(j_decompress_ptr cinfo, long num_bytes) |
| 1046 | { |
| 1047 | struct jpeg_source_mgr *src = cinfo->src; |
| 1048 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 1049 | streamBufferPtr sb = &data->streamBuf; |
| 1050 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 1051 | jlong ret; |
| 1052 | jobject reader; |
| 1053 | |
| 1054 | if (num_bytes < 0) { |
| 1055 | return; |
| 1056 | } |
| 1057 | num_bytes += sb->remaining_skip; |
| 1058 | sb->remaining_skip = 0; |
| 1059 | |
| 1060 | /* First the easy case where we are skipping <= the current contents. */ |
| 1061 | ret = src->bytes_in_buffer; |
| 1062 | if (ret >= num_bytes) { |
| 1063 | src->next_input_byte += num_bytes; |
| 1064 | src->bytes_in_buffer -= num_bytes; |
| 1065 | return; |
| 1066 | } |
| 1067 | |
| 1068 | /* |
| 1069 | * We are skipping more than is in the buffer. We empty the buffer and, |
| 1070 | * if we aren't suspended, call the Java skipBytes method. We always |
| 1071 | * leave the buffer empty, to be filled by either fill method above. |
| 1072 | */ |
| 1073 | src->bytes_in_buffer = 0; |
| 1074 | src->next_input_byte = sb->buf; |
| 1075 | |
| 1076 | num_bytes -= (long)ret; |
| 1077 | if (sb->suspendable) { |
| 1078 | sb->remaining_skip = num_bytes; |
| 1079 | return; |
| 1080 | } |
| 1081 | |
| 1082 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1083 | ret = (*env)->CallLongMethod(env, |
| 1084 | sb->stream, |
| 1085 | ImageInputStream_skipBytesID, |
| 1086 | (jlong) num_bytes); |
| 1087 | if ((*env)->ExceptionOccurred(env) |
| 1088 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 1089 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 1090 | } |
| 1091 | |
| 1092 | /* |
| 1093 | * If we have reached the end of the stream, then the EOI marker |
| 1094 | * is missing. We accept such streams but generate a warning. |
| 1095 | * The image is likely to be corrupted, though everything through |
| 1096 | * the end of the last complete MCU should be usable. |
| 1097 | */ |
| 1098 | if (ret <= 0) { |
| 1099 | reader = data->imageIOobj; |
| 1100 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1101 | (*env)->CallVoidMethod(env, |
| 1102 | reader, |
| 1103 | JPEGImageReader_warningOccurredID, |
| 1104 | READ_NO_EOI); |
| 1105 | |
| 1106 | if ((*env)->ExceptionOccurred(env) |
| 1107 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 1108 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 1109 | } |
| 1110 | sb->buf[0] = (JOCTET) 0xFF; |
| 1111 | sb->buf[1] = (JOCTET) JPEG_EOI; |
| 1112 | src->bytes_in_buffer = 2; |
| 1113 | src->next_input_byte = sb->buf; |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | /* |
| 1118 | * Terminate source --- called by jpeg_finish_decompress() after all |
| 1119 | * data for an image has been read. In our case pushes back any |
| 1120 | * remaining data, as it will be for another image and must be available |
| 1121 | * for java to find out that there is another image. Also called if |
| 1122 | * reseting state after reading a tables-only image. |
| 1123 | */ |
| 1124 | |
| 1125 | GLOBAL(void) |
| 1126 | imageio_term_source(j_decompress_ptr cinfo) |
| 1127 | { |
| 1128 | // To pushback, just seek back by src->bytes_in_buffer |
| 1129 | struct jpeg_source_mgr *src = cinfo->src; |
| 1130 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 1131 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 1132 | jobject reader = data->imageIOobj; |
| 1133 | if (src->bytes_in_buffer > 0) { |
| 1134 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1135 | (*env)->CallVoidMethod(env, |
| 1136 | reader, |
| 1137 | JPEGImageReader_pushBackID, |
| 1138 | src->bytes_in_buffer); |
| 1139 | |
| 1140 | if ((*env)->ExceptionOccurred(env) |
| 1141 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 1142 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 1143 | } |
| 1144 | src->bytes_in_buffer = 0; |
| 1145 | //src->next_input_byte = sb->buf; |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | /********************* end of source manager ******************/ |
| 1150 | |
| 1151 | /********************* ICC profile support ********************/ |
| 1152 | /* |
| 1153 | * The following routines are modified versions of the ICC |
| 1154 | * profile support routines available from the IJG website. |
| 1155 | * The originals were written by Todd Newman |
| 1156 | * <tdn@eccentric.esd.sgi.com> and modified by Tom Lane for |
| 1157 | * the IJG. They are further modified to fit in the context |
| 1158 | * of the imageio JPEG plug-in. |
| 1159 | */ |
| 1160 | |
| 1161 | /* |
| 1162 | * Since an ICC profile can be larger than the maximum size of a JPEG marker |
| 1163 | * (64K), we need provisions to split it into multiple markers. The format |
| 1164 | * defined by the ICC specifies one or more APP2 markers containing the |
| 1165 | * following data: |
| 1166 | * Identifying string ASCII "ICC_PROFILE\0" (12 bytes) |
| 1167 | * Marker sequence number 1 for first APP2, 2 for next, etc (1 byte) |
| 1168 | * Number of markers Total number of APP2's used (1 byte) |
| 1169 | * Profile data (remainder of APP2 data) |
| 1170 | * Decoders should use the marker sequence numbers to reassemble the profile, |
| 1171 | * rather than assuming that the APP2 markers appear in the correct sequence. |
| 1172 | */ |
| 1173 | |
| 1174 | #define ICC_MARKER (JPEG_APP0 + 2) /* JPEG marker code for ICC */ |
| 1175 | #define ICC_OVERHEAD_LEN 14 /* size of non-profile data in APP2 */ |
| 1176 | #define MAX_BYTES_IN_MARKER 65533 /* maximum data len of a JPEG marker */ |
| 1177 | #define MAX_DATA_BYTES_IN_ICC_MARKER (MAX_BYTES_IN_MARKER - ICC_OVERHEAD_LEN) |
| 1178 | |
| 1179 | |
| 1180 | /* |
| 1181 | * Handy subroutine to test whether a saved marker is an ICC profile marker. |
| 1182 | */ |
| 1183 | |
| 1184 | static boolean |
| 1185 | marker_is_icc (jpeg_saved_marker_ptr marker) |
| 1186 | { |
| 1187 | return |
| 1188 | marker->marker == ICC_MARKER && |
| 1189 | marker->data_length >= ICC_OVERHEAD_LEN && |
| 1190 | /* verify the identifying string */ |
| 1191 | GETJOCTET(marker->data[0]) == 0x49 && |
| 1192 | GETJOCTET(marker->data[1]) == 0x43 && |
| 1193 | GETJOCTET(marker->data[2]) == 0x43 && |
| 1194 | GETJOCTET(marker->data[3]) == 0x5F && |
| 1195 | GETJOCTET(marker->data[4]) == 0x50 && |
| 1196 | GETJOCTET(marker->data[5]) == 0x52 && |
| 1197 | GETJOCTET(marker->data[6]) == 0x4F && |
| 1198 | GETJOCTET(marker->data[7]) == 0x46 && |
| 1199 | GETJOCTET(marker->data[8]) == 0x49 && |
| 1200 | GETJOCTET(marker->data[9]) == 0x4C && |
| 1201 | GETJOCTET(marker->data[10]) == 0x45 && |
| 1202 | GETJOCTET(marker->data[11]) == 0x0; |
| 1203 | } |
| 1204 | |
| 1205 | /* |
| 1206 | * See if there was an ICC profile in the JPEG file being read; |
| 1207 | * if so, reassemble and return the profile data as a new Java byte array. |
| 1208 | * If there was no ICC profile, return NULL. |
| 1209 | * |
| 1210 | * If the file contains invalid ICC APP2 markers, we throw an IIOException |
| 1211 | * with an appropriate message. |
| 1212 | */ |
| 1213 | |
| 1214 | jbyteArray |
| 1215 | read_icc_profile (JNIEnv *env, j_decompress_ptr cinfo) |
| 1216 | { |
| 1217 | jpeg_saved_marker_ptr marker; |
| 1218 | int num_markers = 0; |
| 1219 | int seq_no; |
| 1220 | JOCTET *icc_data; |
| 1221 | unsigned int total_length; |
| 1222 | #define MAX_SEQ_NO 255 // sufficient since marker numbers are bytes |
| 1223 | char marker_present[MAX_SEQ_NO+1]; // 1 if marker found |
| 1224 | unsigned int data_length[MAX_SEQ_NO+1]; // size of profile data in marker |
| 1225 | unsigned int data_offset[MAX_SEQ_NO+1]; // offset for data in marker |
| 1226 | jbyteArray data = NULL; |
| 1227 | |
| 1228 | /* This first pass over the saved markers discovers whether there are |
| 1229 | * any ICC markers and verifies the consistency of the marker numbering. |
| 1230 | */ |
| 1231 | |
| 1232 | for (seq_no = 1; seq_no <= MAX_SEQ_NO; seq_no++) |
| 1233 | marker_present[seq_no] = 0; |
| 1234 | |
| 1235 | for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) { |
| 1236 | if (marker_is_icc(marker)) { |
| 1237 | if (num_markers == 0) |
| 1238 | num_markers = GETJOCTET(marker->data[13]); |
| 1239 | else if (num_markers != GETJOCTET(marker->data[13])) { |
| 1240 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1241 | "Invalid icc profile: inconsistent num_markers fields"); |
| 1242 | return NULL; |
| 1243 | } |
| 1244 | seq_no = GETJOCTET(marker->data[12]); |
| 1245 | if (seq_no <= 0 || seq_no > num_markers) { |
| 1246 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1247 | "Invalid icc profile: bad sequence number"); |
| 1248 | return NULL; |
| 1249 | } |
| 1250 | if (marker_present[seq_no]) { |
| 1251 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1252 | "Invalid icc profile: duplicate sequence numbers"); |
| 1253 | return NULL; |
| 1254 | } |
| 1255 | marker_present[seq_no] = 1; |
| 1256 | data_length[seq_no] = marker->data_length - ICC_OVERHEAD_LEN; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | if (num_markers == 0) |
| 1261 | return NULL; // There is no profile |
| 1262 | |
| 1263 | /* Check for missing markers, count total space needed, |
| 1264 | * compute offset of each marker's part of the data. |
| 1265 | */ |
| 1266 | |
| 1267 | total_length = 0; |
| 1268 | for (seq_no = 1; seq_no <= num_markers; seq_no++) { |
| 1269 | if (marker_present[seq_no] == 0) { |
| 1270 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1271 | "Invalid icc profile: missing sequence number"); |
| 1272 | return NULL; |
| 1273 | } |
| 1274 | data_offset[seq_no] = total_length; |
| 1275 | total_length += data_length[seq_no]; |
| 1276 | } |
| 1277 | |
| 1278 | if (total_length <= 0) { |
| 1279 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1280 | "Invalid icc profile: found only empty markers"); |
| 1281 | return NULL; |
| 1282 | } |
| 1283 | |
| 1284 | /* Allocate a Java byte array for assembled data */ |
| 1285 | |
| 1286 | data = (*env)->NewByteArray(env, total_length); |
| 1287 | if (data == NULL) { |
| 1288 | JNU_ThrowByName(env, |
| 1289 | "java/lang/OutOfMemoryError", |
| 1290 | "Reading ICC profile"); |
| 1291 | return NULL; |
| 1292 | } |
| 1293 | |
| 1294 | icc_data = (JOCTET *)(*env)->GetPrimitiveArrayCritical(env, |
| 1295 | data, |
| 1296 | NULL); |
| 1297 | if (icc_data == NULL) { |
| 1298 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1299 | "Unable to pin icc profile data array"); |
| 1300 | return NULL; |
| 1301 | } |
| 1302 | |
| 1303 | /* and fill it in */ |
| 1304 | for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) { |
| 1305 | if (marker_is_icc(marker)) { |
| 1306 | JOCTET FAR *src_ptr; |
| 1307 | JOCTET *dst_ptr; |
| 1308 | unsigned int length; |
| 1309 | seq_no = GETJOCTET(marker->data[12]); |
| 1310 | dst_ptr = icc_data + data_offset[seq_no]; |
| 1311 | src_ptr = marker->data + ICC_OVERHEAD_LEN; |
| 1312 | length = data_length[seq_no]; |
| 1313 | while (length--) { |
| 1314 | *dst_ptr++ = *src_ptr++; |
| 1315 | } |
| 1316 | } |
| 1317 | } |
| 1318 | |
| 1319 | /* finally, unpin the array */ |
| 1320 | (*env)->ReleasePrimitiveArrayCritical(env, |
| 1321 | data, |
| 1322 | icc_data, |
| 1323 | 0); |
| 1324 | |
| 1325 | |
| 1326 | return data; |
| 1327 | } |
| 1328 | |
| 1329 | /********************* end of ICC profile support *************/ |
| 1330 | |
| 1331 | /********************* Reader JNI calls ***********************/ |
| 1332 | |
| 1333 | JNIEXPORT void JNICALL |
| 1334 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initReaderIDs |
| 1335 | (JNIEnv *env, |
| 1336 | jclass cls, |
| 1337 | jclass ImageInputStreamClass, |
| 1338 | jclass qTableClass, |
| 1339 | jclass huffClass) { |
| 1340 | |
| 1341 | ImageInputStream_readID = (*env)->GetMethodID(env, |
| 1342 | ImageInputStreamClass, |
| 1343 | "read", |
| 1344 | "([BII)I"); |
| 1345 | ImageInputStream_skipBytesID = (*env)->GetMethodID(env, |
| 1346 | ImageInputStreamClass, |
| 1347 | "skipBytes", |
| 1348 | "(J)J"); |
| 1349 | JPEGImageReader_warningOccurredID = (*env)->GetMethodID(env, |
| 1350 | cls, |
| 1351 | "warningOccurred", |
| 1352 | "(I)V"); |
| 1353 | JPEGImageReader_warningWithMessageID = |
| 1354 | (*env)->GetMethodID(env, |
| 1355 | cls, |
| 1356 | "warningWithMessage", |
| 1357 | "(Ljava/lang/String;)V"); |
| 1358 | JPEGImageReader_setImageDataID = (*env)->GetMethodID(env, |
| 1359 | cls, |
| 1360 | "setImageData", |
| 1361 | "(IIIII[B)V"); |
| 1362 | JPEGImageReader_acceptPixelsID = (*env)->GetMethodID(env, |
| 1363 | cls, |
| 1364 | "acceptPixels", |
| 1365 | "(IZ)V"); |
| 1366 | JPEGImageReader_passStartedID = (*env)->GetMethodID(env, |
| 1367 | cls, |
| 1368 | "passStarted", |
| 1369 | "(I)V"); |
| 1370 | JPEGImageReader_passCompleteID = (*env)->GetMethodID(env, |
| 1371 | cls, |
| 1372 | "passComplete", |
| 1373 | "()V"); |
| 1374 | JPEGImageReader_pushBackID = (*env)->GetMethodID(env, |
| 1375 | cls, |
| 1376 | "pushBack", |
| 1377 | "(I)V"); |
| 1378 | JPEGQTable_tableID = (*env)->GetFieldID(env, |
| 1379 | qTableClass, |
| 1380 | "qTable", |
| 1381 | "[I"); |
| 1382 | |
| 1383 | JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env, |
| 1384 | huffClass, |
| 1385 | "lengths", |
| 1386 | "[S"); |
| 1387 | |
| 1388 | JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env, |
| 1389 | huffClass, |
| 1390 | "values", |
| 1391 | "[S"); |
| 1392 | } |
| 1393 | |
| 1394 | JNIEXPORT jlong JNICALL |
| 1395 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader |
| 1396 | (JNIEnv *env, |
| 1397 | jobject this) { |
| 1398 | |
| 1399 | imageIODataPtr ret; |
| 1400 | struct sun_jpeg_error_mgr *jerr; |
| 1401 | |
| 1402 | /* This struct contains the JPEG decompression parameters and pointers to |
| 1403 | * working space (which is allocated as needed by the JPEG library). |
| 1404 | */ |
| 1405 | struct jpeg_decompress_struct *cinfo = |
| 1406 | malloc(sizeof(struct jpeg_decompress_struct)); |
| 1407 | if (cinfo == NULL) { |
| 1408 | JNU_ThrowByName( env, |
| 1409 | "java/lang/OutOfMemoryError", |
| 1410 | "Initializing Reader"); |
| 1411 | return 0; |
| 1412 | } |
| 1413 | |
| 1414 | /* We use our private extension JPEG error handler. |
| 1415 | */ |
| 1416 | jerr = malloc (sizeof(struct sun_jpeg_error_mgr)); |
| 1417 | if (jerr == NULL) { |
| 1418 | JNU_ThrowByName( env, |
| 1419 | "java/lang/OutOfMemoryError", |
| 1420 | "Initializing Reader"); |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
| 1424 | /* We set up the normal JPEG error routines, then override error_exit. */ |
| 1425 | cinfo->err = jpeg_std_error(&(jerr->pub)); |
| 1426 | jerr->pub.error_exit = sun_jpeg_error_exit; |
| 1427 | /* We need to setup our own print routines */ |
| 1428 | jerr->pub.output_message = sun_jpeg_output_message; |
| 1429 | /* Now we can setjmp before every call to the library */ |
| 1430 | |
| 1431 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 1432 | if (setjmp(jerr->setjmp_buffer)) { |
| 1433 | /* If we get here, the JPEG code has signaled an error. */ |
| 1434 | char buffer[JMSG_LENGTH_MAX]; |
| 1435 | (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, |
| 1436 | buffer); |
| 1437 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 1438 | return 0; |
| 1439 | } |
| 1440 | |
| 1441 | /* Perform library initialization */ |
| 1442 | jpeg_create_decompress(cinfo); |
| 1443 | |
| 1444 | // Set up to keep any APP2 markers, as these might contain ICC profile |
| 1445 | // data |
| 1446 | jpeg_save_markers(cinfo, ICC_MARKER, 0xFFFF); |
| 1447 | |
| 1448 | /* |
| 1449 | * Now set up our source. |
| 1450 | */ |
| 1451 | cinfo->src = |
| 1452 | (struct jpeg_source_mgr *) malloc (sizeof(struct jpeg_source_mgr)); |
| 1453 | if (cinfo->src == NULL) { |
| 1454 | JNU_ThrowByName(env, |
| 1455 | "java/lang/OutOfMemoryError", |
| 1456 | "Initializing Reader"); |
| 1457 | return 0; |
| 1458 | } |
| 1459 | cinfo->src->bytes_in_buffer = 0; |
| 1460 | cinfo->src->next_input_byte = NULL; |
| 1461 | cinfo->src->init_source = imageio_init_source; |
| 1462 | cinfo->src->fill_input_buffer = imageio_fill_input_buffer; |
| 1463 | cinfo->src->skip_input_data = imageio_skip_input_data; |
| 1464 | cinfo->src->resync_to_restart = jpeg_resync_to_restart; // use default |
| 1465 | cinfo->src->term_source = imageio_term_source; |
| 1466 | |
| 1467 | /* set up the association to persist for future calls */ |
| 1468 | ret = initImageioData(env, (j_common_ptr) cinfo, this); |
| 1469 | if (ret == NULL) { |
| 1470 | JNU_ThrowByName( env, |
| 1471 | "java/lang/OutOfMemoryError", |
| 1472 | "Initializing Reader"); |
| 1473 | return 0; |
| 1474 | } |
| 1475 | return (jlong) ret; |
| 1476 | } |
| 1477 | |
| 1478 | /* |
| 1479 | * When we set a source from Java, we set up the stream in the streamBuf |
| 1480 | * object. If there was an old one, it is released first. |
| 1481 | */ |
| 1482 | |
| 1483 | JNIEXPORT void JNICALL |
| 1484 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setSource |
| 1485 | (JNIEnv *env, |
| 1486 | jobject this, |
| 1487 | jlong ptr, |
| 1488 | jobject source) { |
| 1489 | |
| 1490 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 1491 | j_common_ptr cinfo; |
| 1492 | |
| 1493 | if (data == NULL) { |
| 1494 | JNU_ThrowByName(env, |
| 1495 | "java/lang/IllegalStateException", |
| 1496 | "Attempting to use reader after dispose()"); |
| 1497 | return; |
| 1498 | } |
| 1499 | |
| 1500 | cinfo = data->jpegObj; |
| 1501 | |
| 1502 | imageio_set_stream(env, cinfo, data, source); |
| 1503 | |
| 1504 | imageio_init_source((j_decompress_ptr) cinfo); |
| 1505 | } |
| 1506 | |
| 1507 | #define JPEG_APP1 (JPEG_APP0 + 1) /* EXIF APP1 marker code */ |
| 1508 | |
| 1509 | /* |
| 1510 | * For EXIF images, the APP1 will appear immediately after the SOI, |
| 1511 | * so it's safe to only look at the first marker in the list. |
| 1512 | * (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 58) |
| 1513 | */ |
| 1514 | #define IS_EXIF(c) \ |
| 1515 | (((c)->marker_list != NULL) && ((c)->marker_list->marker == JPEG_APP1)) |
| 1516 | |
| 1517 | JNIEXPORT jboolean JNICALL |
| 1518 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImageHeader |
| 1519 | (JNIEnv *env, |
| 1520 | jobject this, |
| 1521 | jlong ptr, |
| 1522 | jboolean clearFirst, |
| 1523 | jboolean reset) { |
| 1524 | |
| 1525 | int ret; |
| 1526 | int h_samp0, h_samp1, h_samp2; |
| 1527 | int v_samp0, v_samp1, v_samp2; |
| 1528 | jboolean retval = JNI_FALSE; |
| 1529 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 1530 | j_decompress_ptr cinfo; |
| 1531 | struct jpeg_source_mgr *src; |
| 1532 | sun_jpeg_error_ptr jerr; |
| 1533 | |
| 1534 | if (data == NULL) { |
| 1535 | JNU_ThrowByName(env, |
| 1536 | "java/lang/IllegalStateException", |
| 1537 | "Attempting to use reader after dispose()"); |
| 1538 | return JNI_FALSE; |
| 1539 | } |
| 1540 | |
| 1541 | cinfo = (j_decompress_ptr) data->jpegObj; |
| 1542 | src = cinfo->src; |
| 1543 | |
| 1544 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 1545 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 1546 | |
| 1547 | if (setjmp(jerr->setjmp_buffer)) { |
| 1548 | /* If we get here, the JPEG code has signaled an error |
| 1549 | while reading the header. */ |
| 1550 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1551 | if (!(*env)->ExceptionOccurred(env)) { |
| 1552 | char buffer[JMSG_LENGTH_MAX]; |
| 1553 | (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, |
| 1554 | buffer); |
| 1555 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 1556 | } |
| 1557 | return retval; |
| 1558 | } |
| 1559 | |
| 1560 | #ifdef DEBUG |
| 1561 | printf("In readImageHeader, data is %p cinfo is %p\n", data, cinfo); |
| 1562 | printf("clearFirst is %d\n", clearFirst); |
| 1563 | #endif |
| 1564 | |
| 1565 | if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) { |
| 1566 | JNU_ThrowByName(env, |
| 1567 | "javax/imageio/IIOException", |
| 1568 | "Array pin failed"); |
| 1569 | return retval; |
| 1570 | } |
| 1571 | |
| 1572 | /* |
| 1573 | * Now clear the input buffer if the Java code has done a seek |
| 1574 | * on the stream since the last call, invalidating any buffer contents. |
| 1575 | */ |
| 1576 | if (clearFirst) { |
| 1577 | clearStreamBuffer(&data->streamBuf); |
| 1578 | src->next_input_byte = NULL; |
| 1579 | src->bytes_in_buffer = 0; |
| 1580 | } |
| 1581 | |
| 1582 | ret = jpeg_read_header(cinfo, FALSE); |
| 1583 | |
| 1584 | if (ret == JPEG_HEADER_TABLES_ONLY) { |
| 1585 | retval = JNI_TRUE; |
| 1586 | imageio_term_source(cinfo); // Pushback remaining buffer contents |
| 1587 | #ifdef DEBUG |
| 1588 | printf("just read tables-only image; q table 0 at %p\n", |
| 1589 | cinfo->quant_tbl_ptrs[0]); |
| 1590 | #endif |
| 1591 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1592 | } else { |
| 1593 | /* |
| 1594 | * Now adjust the jpeg_color_space variable, which was set in |
| 1595 | * default_decompress_parms, to reflect our differences from IJG |
| 1596 | */ |
| 1597 | |
| 1598 | switch (cinfo->jpeg_color_space) { |
| 1599 | default : |
| 1600 | break; |
| 1601 | case JCS_YCbCr: |
| 1602 | |
| 1603 | /* |
| 1604 | * There are several possibilities: |
| 1605 | * - we got image with embeded colorspace |
| 1606 | * Use it. User knows what he is doing. |
| 1607 | * - we got JFIF image |
| 1608 | * Must be YCbCr (see http://www.w3.org/Graphics/JPEG/jfif3.pdf, page 2) |
| 1609 | * - we got EXIF image |
| 1610 | * Must be YCbCr (see http://www.exif.org/Exif2-2.PDF, section 4.7, page 63) |
| 1611 | * - something else |
| 1612 | * Apply heuristical rules to identify actual colorspace. |
| 1613 | */ |
| 1614 | |
| 1615 | if (cinfo->saw_Adobe_marker) { |
| 1616 | if (cinfo->Adobe_transform != 1) { |
| 1617 | /* |
| 1618 | * IJG guesses this is YCbCr and emits a warning |
| 1619 | * We would rather not guess. Then the user knows |
| 1620 | * To read this as a Raster if at all |
| 1621 | */ |
| 1622 | cinfo->jpeg_color_space = JCS_UNKNOWN; |
| 1623 | cinfo->out_color_space = JCS_UNKNOWN; |
| 1624 | } |
| 1625 | } else if (!cinfo->saw_JFIF_marker && !IS_EXIF(cinfo)) { |
| 1626 | /* |
| 1627 | * IJG assumes all unidentified 3-channels are YCbCr. |
| 1628 | * We assume that only if the second two channels are |
| 1629 | * subsampled (either horizontally or vertically). If not, |
| 1630 | * we assume RGB. |
| 1631 | * |
| 1632 | * 4776576: Some digital cameras output YCbCr JPEG images |
| 1633 | * that do not contain a JFIF APP0 marker but are only |
| 1634 | * vertically subsampled (no horizontal subsampling). |
| 1635 | * We should only assume this is RGB data if the subsampling |
| 1636 | * factors for the second two channels are the same as the |
| 1637 | * first (check both horizontal and vertical factors). |
| 1638 | */ |
| 1639 | h_samp0 = cinfo->comp_info[0].h_samp_factor; |
| 1640 | h_samp1 = cinfo->comp_info[1].h_samp_factor; |
| 1641 | h_samp2 = cinfo->comp_info[2].h_samp_factor; |
| 1642 | |
| 1643 | v_samp0 = cinfo->comp_info[0].v_samp_factor; |
| 1644 | v_samp1 = cinfo->comp_info[1].v_samp_factor; |
| 1645 | v_samp2 = cinfo->comp_info[2].v_samp_factor; |
| 1646 | |
| 1647 | if ((h_samp1 == h_samp0) && (h_samp2 == h_samp0) && |
| 1648 | (v_samp1 == v_samp0) && (v_samp2 == v_samp0)) |
| 1649 | { |
| 1650 | cinfo->jpeg_color_space = JCS_RGB; |
| 1651 | /* output is already RGB, so it stays the same */ |
| 1652 | } |
| 1653 | } |
| 1654 | break; |
| 1655 | #ifdef YCCALPHA |
| 1656 | case JCS_YCC: |
| 1657 | cinfo->out_color_space = JCS_YCC; |
| 1658 | break; |
| 1659 | #endif |
| 1660 | case JCS_YCCK: |
| 1661 | if ((cinfo->saw_Adobe_marker) && (cinfo->Adobe_transform != 2)) { |
| 1662 | /* |
| 1663 | * IJG guesses this is YCCK and emits a warning |
| 1664 | * We would rather not guess. Then the user knows |
| 1665 | * To read this as a Raster if at all |
| 1666 | */ |
| 1667 | cinfo->jpeg_color_space = JCS_UNKNOWN; |
| 1668 | cinfo->out_color_space = JCS_UNKNOWN; |
| 1669 | } |
| 1670 | break; |
| 1671 | case JCS_CMYK: |
| 1672 | /* |
| 1673 | * IJG assumes all unidentified 4-channels are CMYK. |
| 1674 | * We assume that only if the second two channels are |
| 1675 | * not subsampled (either horizontally or vertically). |
| 1676 | * If they are, we assume YCCK. |
| 1677 | */ |
| 1678 | h_samp0 = cinfo->comp_info[0].h_samp_factor; |
| 1679 | h_samp1 = cinfo->comp_info[1].h_samp_factor; |
| 1680 | h_samp2 = cinfo->comp_info[2].h_samp_factor; |
| 1681 | |
| 1682 | v_samp0 = cinfo->comp_info[0].v_samp_factor; |
| 1683 | v_samp1 = cinfo->comp_info[1].v_samp_factor; |
| 1684 | v_samp2 = cinfo->comp_info[2].v_samp_factor; |
| 1685 | |
| 1686 | if ((h_samp1 > h_samp0) && (h_samp2 > h_samp0) || |
| 1687 | (v_samp1 > v_samp0) && (v_samp2 > v_samp0)) |
| 1688 | { |
| 1689 | cinfo->jpeg_color_space = JCS_YCCK; |
| 1690 | /* Leave the output space as CMYK */ |
| 1691 | } |
| 1692 | } |
| 1693 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1694 | (*env)->CallVoidMethod(env, this, |
| 1695 | JPEGImageReader_setImageDataID, |
| 1696 | cinfo->image_width, |
| 1697 | cinfo->image_height, |
| 1698 | cinfo->jpeg_color_space, |
| 1699 | cinfo->out_color_space, |
| 1700 | cinfo->num_components, |
| 1701 | read_icc_profile(env, cinfo)); |
| 1702 | if (reset) { |
| 1703 | jpeg_abort_decompress(cinfo); |
| 1704 | } |
| 1705 | } |
| 1706 | |
| 1707 | return retval; |
| 1708 | } |
| 1709 | |
| 1710 | |
| 1711 | JNIEXPORT void JNICALL |
| 1712 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_setOutColorSpace |
| 1713 | (JNIEnv *env, |
| 1714 | jobject this, |
| 1715 | jlong ptr, |
| 1716 | jint code) { |
| 1717 | |
| 1718 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 1719 | j_decompress_ptr cinfo; |
| 1720 | |
| 1721 | if (data == NULL) { |
| 1722 | JNU_ThrowByName(env, |
| 1723 | "java/lang/IllegalStateException", |
| 1724 | "Attempting to use reader after dispose()"); |
| 1725 | return; |
| 1726 | } |
| 1727 | |
| 1728 | cinfo = (j_decompress_ptr) data->jpegObj; |
| 1729 | |
| 1730 | cinfo->out_color_space = code; |
| 1731 | |
| 1732 | } |
| 1733 | |
| 1734 | JNIEXPORT jboolean JNICALL |
| 1735 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_readImage |
| 1736 | (JNIEnv *env, |
| 1737 | jobject this, |
| 1738 | jlong ptr, |
| 1739 | jbyteArray buffer, |
| 1740 | jint numBands, |
| 1741 | jintArray srcBands, |
| 1742 | jintArray bandSizes, |
| 1743 | jint sourceXStart, |
| 1744 | jint sourceYStart, |
| 1745 | jint sourceWidth, |
| 1746 | jint sourceHeight, |
| 1747 | jint stepX, |
| 1748 | jint stepY, |
| 1749 | jobjectArray qtables, |
| 1750 | jobjectArray DCHuffmanTables, |
| 1751 | jobjectArray ACHuffmanTables, |
| 1752 | jint minProgressivePass, // Counts from 0 |
| 1753 | jint maxProgressivePass, |
| 1754 | jboolean wantUpdates) { |
| 1755 | |
| 1756 | |
| 1757 | struct jpeg_source_mgr *src; |
| 1758 | JSAMPROW scanLinePtr; |
| 1759 | jint bands[MAX_BANDS]; |
| 1760 | int i, j; |
| 1761 | jint *body; |
| 1762 | int scanlineLimit; |
| 1763 | int pixelStride; |
| 1764 | unsigned char *in, *out, *pixelLimit; |
| 1765 | int targetLine; |
| 1766 | int skipLines, linesLeft; |
| 1767 | pixelBufferPtr pb; |
| 1768 | sun_jpeg_error_ptr jerr; |
| 1769 | boolean done; |
| 1770 | jint *bandSize; |
| 1771 | int maxBandValue, halfMaxBandValue; |
| 1772 | boolean mustScale = FALSE; |
| 1773 | boolean progressive = FALSE; |
| 1774 | boolean orderedBands = TRUE; |
| 1775 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 1776 | j_decompress_ptr cinfo; |
| 1777 | |
| 1778 | /* verify the inputs */ |
| 1779 | |
| 1780 | if (data == NULL) { |
| 1781 | JNU_ThrowByName(env, |
| 1782 | "java/lang/IllegalStateException", |
| 1783 | "Attempting to use reader after dispose()"); |
| 1784 | return JNI_FALSE; |
| 1785 | } |
| 1786 | |
| 1787 | if ((buffer == NULL) || (srcBands == NULL)) { |
| 1788 | JNU_ThrowNullPointerException(env, 0); |
| 1789 | return JNI_FALSE; |
| 1790 | } |
| 1791 | |
| 1792 | cinfo = (j_decompress_ptr) data->jpegObj; |
| 1793 | |
| 1794 | if ((numBands < 1) || (numBands > cinfo->num_components) || |
| 1795 | (sourceXStart < 0) || (sourceXStart >= (jint)cinfo->image_width) || |
| 1796 | (sourceYStart < 0) || (sourceYStart >= (jint)cinfo->image_height) || |
| 1797 | (sourceWidth < 1) || (sourceWidth > (jint)cinfo->image_width) || |
| 1798 | (sourceHeight < 1) || (sourceHeight > (jint)cinfo->image_height) || |
| 1799 | (stepX < 1) || (stepY < 1) || |
| 1800 | (minProgressivePass < 0) || |
| 1801 | (maxProgressivePass < minProgressivePass)) |
| 1802 | { |
| 1803 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 1804 | "Invalid argument to native readImage"); |
| 1805 | return JNI_FALSE; |
| 1806 | } |
| 1807 | |
| 1808 | /* |
| 1809 | * First get the source bands array and copy it to our local array |
| 1810 | * so we don't have to worry about pinning and unpinning it again. |
| 1811 | */ |
| 1812 | |
| 1813 | body = (*env)->GetIntArrayElements(env, srcBands, NULL); |
| 1814 | if (body == NULL) { |
| 1815 | JNU_ThrowByName( env, |
| 1816 | "java/lang/OutOfMemoryError", |
| 1817 | "Initializing Read"); |
| 1818 | return JNI_FALSE; |
| 1819 | } |
| 1820 | |
| 1821 | for (i = 0; i < numBands; i++) { |
| 1822 | bands[i] = body[i]; |
| 1823 | if (orderedBands && (bands[i] != i)) { |
| 1824 | orderedBands = FALSE; |
| 1825 | } |
| 1826 | } |
| 1827 | |
| 1828 | (*env)->ReleaseIntArrayElements(env, srcBands, body, JNI_ABORT); |
| 1829 | |
| 1830 | #ifdef DEBUG |
| 1831 | printf("---- in reader.read ----\n"); |
| 1832 | printf("numBands is %d\n", numBands); |
| 1833 | printf("bands array: "); |
| 1834 | for (i = 0; i < numBands; i++) { |
| 1835 | printf("%d ", bands[i]); |
| 1836 | } |
| 1837 | printf("\n"); |
| 1838 | printf("jq table 0 at %p\n", |
| 1839 | cinfo->quant_tbl_ptrs[0]); |
| 1840 | #endif |
| 1841 | |
| 1842 | data = (imageIODataPtr) cinfo->client_data; |
| 1843 | src = cinfo->src; |
| 1844 | |
| 1845 | /* Set the buffer as our PixelBuffer */ |
| 1846 | pb = &data->pixelBuf; |
| 1847 | |
| 1848 | if (setPixelBuffer(env, pb, buffer) == NOT_OK) { |
| 1849 | return data->abortFlag; // We already threw an out of memory exception |
| 1850 | } |
| 1851 | |
| 1852 | // Allocate a 1-scanline buffer |
| 1853 | scanLinePtr = (JSAMPROW)malloc(cinfo->image_width*cinfo->num_components); |
| 1854 | if (scanLinePtr == NULL) { |
| 1855 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1856 | JNU_ThrowByName( env, |
| 1857 | "java/lang/OutOfMemoryError", |
| 1858 | "Reading JPEG Stream"); |
| 1859 | return data->abortFlag; |
| 1860 | } |
| 1861 | |
| 1862 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 1863 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 1864 | |
| 1865 | if (setjmp(jerr->setjmp_buffer)) { |
| 1866 | /* If we get here, the JPEG code has signaled an error |
| 1867 | while reading. */ |
| 1868 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1869 | if (!(*env)->ExceptionOccurred(env)) { |
| 1870 | char buffer[JMSG_LENGTH_MAX]; |
| 1871 | (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, |
| 1872 | buffer); |
| 1873 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 1874 | } |
| 1875 | free(scanLinePtr); |
| 1876 | return data->abortFlag; |
| 1877 | } |
| 1878 | |
| 1879 | if (GET_ARRAYS(env, data, &src->next_input_byte) == NOT_OK) { |
| 1880 | JNU_ThrowByName(env, |
| 1881 | "javax/imageio/IIOException", |
| 1882 | "Array pin failed"); |
| 1883 | return data->abortFlag; |
| 1884 | } |
| 1885 | |
| 1886 | // If there are no tables in our structure and table arguments aren't |
| 1887 | // NULL, use the table arguments. |
| 1888 | if ((qtables != NULL) && (cinfo->quant_tbl_ptrs[0] == NULL)) { |
| 1889 | (void) setQTables(env, (j_common_ptr) cinfo, qtables, TRUE); |
| 1890 | } |
| 1891 | |
| 1892 | if ((DCHuffmanTables != NULL) && (cinfo->dc_huff_tbl_ptrs[0] == NULL)) { |
| 1893 | setHTables(env, (j_common_ptr) cinfo, |
| 1894 | DCHuffmanTables, |
| 1895 | ACHuffmanTables, |
| 1896 | TRUE); |
| 1897 | } |
| 1898 | |
| 1899 | progressive = jpeg_has_multiple_scans(cinfo); |
| 1900 | if (progressive) { |
| 1901 | cinfo->buffered_image = TRUE; |
| 1902 | cinfo->input_scan_number = minProgressivePass+1; // Java count from 0 |
| 1903 | #define MAX_JAVA_INT 2147483647 // XXX Is this defined in JNI somewhere? |
| 1904 | if (maxProgressivePass < MAX_JAVA_INT) { |
| 1905 | maxProgressivePass++; // For testing |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | data->streamBuf.suspendable = FALSE; |
| 1910 | |
| 1911 | jpeg_start_decompress(cinfo); |
| 1912 | |
| 1913 | // loop over progressive passes |
| 1914 | done = FALSE; |
| 1915 | while (!done) { |
| 1916 | if (progressive) { |
| 1917 | // initialize the next pass. Note that this skips up to |
| 1918 | // the first interesting pass. |
| 1919 | jpeg_start_output(cinfo, cinfo->input_scan_number); |
| 1920 | if (wantUpdates) { |
| 1921 | (*env)->CallVoidMethod(env, this, |
| 1922 | JPEGImageReader_passStartedID, |
| 1923 | cinfo->input_scan_number-1); |
| 1924 | } |
| 1925 | } else if (wantUpdates) { |
| 1926 | (*env)->CallVoidMethod(env, this, |
| 1927 | JPEGImageReader_passStartedID, |
| 1928 | 0); |
| 1929 | |
| 1930 | } |
| 1931 | |
| 1932 | // Skip until the first interesting line |
| 1933 | while ((data->abortFlag == JNI_FALSE) |
| 1934 | && ((jint)cinfo->output_scanline < sourceYStart)) { |
| 1935 | jpeg_read_scanlines(cinfo, &scanLinePtr, 1); |
| 1936 | } |
| 1937 | |
| 1938 | scanlineLimit = sourceYStart+sourceHeight; |
| 1939 | pixelLimit = scanLinePtr |
| 1940 | +(sourceXStart+sourceWidth)*cinfo->num_components; |
| 1941 | |
| 1942 | pixelStride = stepX*cinfo->num_components; |
| 1943 | targetLine = 0; |
| 1944 | |
| 1945 | while ((data->abortFlag == JNI_FALSE) |
| 1946 | && ((jint)cinfo->output_scanline < scanlineLimit)) { |
| 1947 | |
| 1948 | jpeg_read_scanlines(cinfo, &scanLinePtr, 1); |
| 1949 | |
| 1950 | // Now mangle it into our buffer |
| 1951 | out = data->pixelBuf.buf.bp; |
| 1952 | |
| 1953 | if (orderedBands && (pixelStride == numBands)) { |
| 1954 | // Optimization: The component bands are ordered sequentially, |
| 1955 | // so we can simply use memcpy() to copy the intermediate |
| 1956 | // scanline buffer into the raster. |
| 1957 | in = scanLinePtr + (sourceXStart * cinfo->num_components); |
| 1958 | if (pixelLimit > in) { |
| 1959 | memcpy(out, in, pixelLimit - in); |
| 1960 | } |
| 1961 | } else { |
| 1962 | for (in = scanLinePtr+sourceXStart*cinfo->num_components; |
| 1963 | in < pixelLimit; |
| 1964 | in += pixelStride) { |
| 1965 | for (i = 0; i < numBands; i++) { |
| 1966 | *out++ = *(in+bands[i]); |
| 1967 | } |
| 1968 | } |
| 1969 | } |
| 1970 | |
| 1971 | // And call it back to Java |
| 1972 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 1973 | (*env)->CallVoidMethod(env, |
| 1974 | this, |
| 1975 | JPEGImageReader_acceptPixelsID, |
| 1976 | targetLine++, |
| 1977 | progressive); |
| 1978 | |
| 1979 | if ((*env)->ExceptionOccurred(env) |
| 1980 | || !GET_ARRAYS(env, data, &(src->next_input_byte))) { |
| 1981 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 1982 | } |
| 1983 | |
| 1984 | // And skip over uninteresting lines to the next subsampled line |
| 1985 | // Ensure we don't go past the end of the image |
| 1986 | |
| 1987 | // Lines to skip based on subsampling |
| 1988 | skipLines = stepY - 1; |
| 1989 | // Lines left in the image |
| 1990 | linesLeft = scanlineLimit - cinfo->output_scanline; |
| 1991 | // Take the minimum |
| 1992 | if (skipLines > linesLeft) { |
| 1993 | skipLines = linesLeft; |
| 1994 | } |
| 1995 | for(i = 0; i < skipLines; i++) { |
| 1996 | jpeg_read_scanlines(cinfo, &scanLinePtr, 1); |
| 1997 | } |
| 1998 | } |
| 1999 | if (progressive) { |
| 2000 | jpeg_finish_output(cinfo); // Increments pass counter |
| 2001 | // Call Java to notify pass complete |
| 2002 | if (jpeg_input_complete(cinfo) |
| 2003 | || (cinfo->input_scan_number > maxProgressivePass)) { |
| 2004 | done = TRUE; |
| 2005 | } |
| 2006 | } else { |
| 2007 | done = TRUE; |
| 2008 | } |
| 2009 | if (wantUpdates) { |
| 2010 | (*env)->CallVoidMethod(env, this, |
| 2011 | JPEGImageReader_passCompleteID); |
| 2012 | } |
| 2013 | |
| 2014 | } |
| 2015 | /* |
| 2016 | * We are done, but we might not have read all the lines, or all |
| 2017 | * the passes, so use jpeg_abort instead of jpeg_finish_decompress. |
| 2018 | */ |
| 2019 | if (cinfo->output_scanline == cinfo->output_height) { |
| 2020 | // if ((cinfo->output_scanline == cinfo->output_height) && |
| 2021 | //(jpeg_input_complete(cinfo))) { // We read the whole file |
| 2022 | jpeg_finish_decompress(cinfo); |
| 2023 | } else { |
| 2024 | jpeg_abort_decompress(cinfo); |
| 2025 | } |
| 2026 | |
| 2027 | free(scanLinePtr); |
| 2028 | |
| 2029 | RELEASE_ARRAYS(env, data, src->next_input_byte); |
| 2030 | |
| 2031 | return data->abortFlag; |
| 2032 | } |
| 2033 | |
| 2034 | JNIEXPORT void JNICALL |
| 2035 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_abortRead |
| 2036 | (JNIEnv *env, |
| 2037 | jobject this, |
| 2038 | jlong ptr) { |
| 2039 | |
| 2040 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2041 | |
| 2042 | if (data == NULL) { |
| 2043 | JNU_ThrowByName(env, |
| 2044 | "java/lang/IllegalStateException", |
| 2045 | "Attempting to use reader after dispose()"); |
| 2046 | return; |
| 2047 | } |
| 2048 | |
| 2049 | imageio_abort(env, this, data); |
| 2050 | |
| 2051 | } |
| 2052 | |
| 2053 | JNIEXPORT void JNICALL |
| 2054 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetLibraryState |
| 2055 | (JNIEnv *env, |
| 2056 | jobject this, |
| 2057 | jlong ptr) { |
| 2058 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2059 | j_decompress_ptr cinfo; |
| 2060 | |
| 2061 | if (data == NULL) { |
| 2062 | JNU_ThrowByName(env, |
| 2063 | "java/lang/IllegalStateException", |
| 2064 | "Attempting to use reader after dispose()"); |
| 2065 | return; |
| 2066 | } |
| 2067 | |
| 2068 | cinfo = (j_decompress_ptr) data->jpegObj; |
| 2069 | |
| 2070 | jpeg_abort_decompress(cinfo); |
| 2071 | } |
| 2072 | |
| 2073 | |
| 2074 | JNIEXPORT void JNICALL |
| 2075 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_resetReader |
| 2076 | (JNIEnv *env, |
| 2077 | jobject this, |
| 2078 | jlong ptr) { |
| 2079 | |
| 2080 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2081 | j_decompress_ptr cinfo; |
| 2082 | sun_jpeg_error_ptr jerr; |
| 2083 | |
| 2084 | if (data == NULL) { |
| 2085 | JNU_ThrowByName(env, |
| 2086 | "java/lang/IllegalStateException", |
| 2087 | "Attempting to use reader after dispose()"); |
| 2088 | return; |
| 2089 | } |
| 2090 | |
| 2091 | cinfo = (j_decompress_ptr) data->jpegObj; |
| 2092 | |
| 2093 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 2094 | |
| 2095 | imageio_reset(env, (j_common_ptr) cinfo, data); |
| 2096 | |
| 2097 | /* |
| 2098 | * The tables have not been reset, and there is no way to do so |
| 2099 | * in IJG without leaking memory. The only situation in which |
| 2100 | * this will cause a problem is if an image-only stream is read |
| 2101 | * with this object without initializing the correct tables first. |
| 2102 | * This situation, which should cause an error, might work but |
| 2103 | * produce garbage instead. If the huffman tables are wrong, |
| 2104 | * it will fail during the decode. If the q tables are wrong, it |
| 2105 | * will look strange. This is very unlikely, so don't worry about |
| 2106 | * it. To be really robust, we would keep a flag for table state |
| 2107 | * and consult it to catch exceptional situations. |
| 2108 | */ |
| 2109 | |
| 2110 | /* above does not clean up the source, so we have to */ |
| 2111 | |
| 2112 | /* |
| 2113 | We need to explicitly initialize exception handler or we may |
| 2114 | longjump to random address from the term_source() |
| 2115 | */ |
| 2116 | |
| 2117 | if (setjmp(jerr->setjmp_buffer)) { |
| 2118 | |
| 2119 | /* |
| 2120 | We may get IOException from pushBack() here. |
| 2121 | |
| 2122 | However it could be legal if original input stream was closed |
| 2123 | earlier (for example because network connection was closed). |
| 2124 | Unfortunately, image inputstream API has no way to check whether |
| 2125 | stream is already closed or IOException was thrown because of some |
| 2126 | other IO problem, |
| 2127 | And we can not avoid call to pushBack() on closed stream for the |
| 2128 | same reason. |
| 2129 | |
| 2130 | So, for now we will silently eat this exception. |
| 2131 | |
| 2132 | NB: this may be changed in future when ImageInputStream API will |
| 2133 | become more flexible. |
| 2134 | */ |
| 2135 | |
| 2136 | if ((*env)->ExceptionOccurred(env)) { |
| 2137 | (*env)->ExceptionClear(env); |
| 2138 | } |
| 2139 | } else { |
| 2140 | cinfo->src->term_source(cinfo); |
| 2141 | } |
| 2142 | |
| 2143 | cinfo->src->bytes_in_buffer = 0; |
| 2144 | cinfo->src->next_input_byte = NULL; |
| 2145 | } |
| 2146 | |
| 2147 | JNIEXPORT void JNICALL |
| 2148 | Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_disposeReader |
| 2149 | (JNIEnv *env, |
| 2150 | jclass reader, |
| 2151 | jlong ptr) { |
| 2152 | |
| 2153 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2154 | j_common_ptr info = destroyImageioData(env, data); |
| 2155 | |
| 2156 | imageio_dispose(info); |
| 2157 | } |
| 2158 | |
| 2159 | /********************** end of Reader *************************/ |
| 2160 | |
| 2161 | /********************** Writer Support ************************/ |
| 2162 | |
| 2163 | /********************** Destination Manager *******************/ |
| 2164 | |
| 2165 | METHODDEF(void) |
| 2166 | /* |
| 2167 | * Initialize destination --- called by jpeg_start_compress |
| 2168 | * before any data is actually written. The data arrays |
| 2169 | * must be pinned before this is called. |
| 2170 | */ |
| 2171 | imageio_init_destination (j_compress_ptr cinfo) |
| 2172 | { |
| 2173 | struct jpeg_destination_mgr *dest = cinfo->dest; |
| 2174 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 2175 | streamBufferPtr sb = &data->streamBuf; |
| 2176 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 2177 | |
| 2178 | if (sb->buf == NULL) { |
| 2179 | // We forgot to pin the array |
| 2180 | (*env)->FatalError(env, "Output buffer not pinned!"); |
| 2181 | } |
| 2182 | |
| 2183 | dest->next_output_byte = sb->buf; |
| 2184 | dest->free_in_buffer = sb->bufferLength; |
| 2185 | } |
| 2186 | |
| 2187 | /* |
| 2188 | * Empty the output buffer --- called whenever buffer fills up. |
| 2189 | * |
| 2190 | * This routine writes the entire output buffer |
| 2191 | * (ignoring the current state of next_output_byte & free_in_buffer), |
| 2192 | * resets the pointer & count to the start of the buffer, and returns TRUE |
| 2193 | * indicating that the buffer has been dumped. |
| 2194 | */ |
| 2195 | |
| 2196 | METHODDEF(boolean) |
| 2197 | imageio_empty_output_buffer (j_compress_ptr cinfo) |
| 2198 | { |
| 2199 | struct jpeg_destination_mgr *dest = cinfo->dest; |
| 2200 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 2201 | streamBufferPtr sb = &data->streamBuf; |
| 2202 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 2203 | |
| 2204 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2205 | |
| 2206 | (*env)->CallVoidMethod(env, |
| 2207 | sb->stream, |
| 2208 | ImageOutputStream_writeID, |
| 2209 | sb->hstreamBuffer, |
| 2210 | 0, |
| 2211 | sb->bufferLength); |
| 2212 | if ((*env)->ExceptionOccurred(env) |
| 2213 | || !GET_ARRAYS(env, data, |
| 2214 | (const JOCTET **)(&dest->next_output_byte))) { |
| 2215 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 2216 | } |
| 2217 | |
| 2218 | dest->next_output_byte = sb->buf; |
| 2219 | dest->free_in_buffer = sb->bufferLength; |
| 2220 | |
| 2221 | return TRUE; |
| 2222 | } |
| 2223 | |
| 2224 | /* |
| 2225 | * After all of the data has been encoded there may still be some |
| 2226 | * more left over in some of the working buffers. Now is the |
| 2227 | * time to clear them out. |
| 2228 | */ |
| 2229 | METHODDEF(void) |
| 2230 | imageio_term_destination (j_compress_ptr cinfo) |
| 2231 | { |
| 2232 | struct jpeg_destination_mgr *dest = cinfo->dest; |
| 2233 | imageIODataPtr data = (imageIODataPtr) cinfo->client_data; |
| 2234 | streamBufferPtr sb = &data->streamBuf; |
| 2235 | JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); |
| 2236 | |
| 2237 | /* find out how much needs to be written */ |
| 2238 | jint datacount = sb->bufferLength - dest->free_in_buffer; |
| 2239 | |
| 2240 | if (datacount != 0) { |
| 2241 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2242 | |
| 2243 | (*env)->CallVoidMethod(env, |
| 2244 | sb->stream, |
| 2245 | ImageOutputStream_writeID, |
| 2246 | sb->hstreamBuffer, |
| 2247 | 0, |
| 2248 | datacount); |
| 2249 | |
| 2250 | if ((*env)->ExceptionOccurred(env) |
| 2251 | || !GET_ARRAYS(env, data, |
| 2252 | (const JOCTET **)(&dest->next_output_byte))) { |
| 2253 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | dest->next_output_byte = NULL; |
| 2258 | dest->free_in_buffer = 0; |
| 2259 | |
| 2260 | } |
| 2261 | |
| 2262 | /* |
| 2263 | * Flush the destination buffer. This is not called by the library, |
| 2264 | * but by our code below. This is the simplest implementation, though |
| 2265 | * certainly not the most efficient. |
| 2266 | */ |
| 2267 | METHODDEF(void) |
| 2268 | imageio_flush_destination(j_compress_ptr cinfo) |
| 2269 | { |
| 2270 | imageio_term_destination(cinfo); |
| 2271 | imageio_init_destination(cinfo); |
| 2272 | } |
| 2273 | |
| 2274 | /********************** end of destination manager ************/ |
| 2275 | |
| 2276 | /********************** Writer JNI calls **********************/ |
| 2277 | |
| 2278 | |
| 2279 | JNIEXPORT void JNICALL |
| 2280 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initWriterIDs |
| 2281 | (JNIEnv *env, |
| 2282 | jclass cls, |
| 2283 | jclass IOSClass, |
| 2284 | jclass qTableClass, |
| 2285 | jclass huffClass) { |
| 2286 | |
| 2287 | ImageOutputStream_writeID = (*env)->GetMethodID(env, |
| 2288 | IOSClass, |
| 2289 | "write", |
| 2290 | "([BII)V"); |
| 2291 | |
| 2292 | JPEGImageWriter_warningOccurredID = (*env)->GetMethodID(env, |
| 2293 | cls, |
| 2294 | "warningOccurred", |
| 2295 | "(I)V"); |
| 2296 | JPEGImageWriter_warningWithMessageID = |
| 2297 | (*env)->GetMethodID(env, |
| 2298 | cls, |
| 2299 | "warningWithMessage", |
| 2300 | "(Ljava/lang/String;)V"); |
| 2301 | |
| 2302 | JPEGImageWriter_writeMetadataID = (*env)->GetMethodID(env, |
| 2303 | cls, |
| 2304 | "writeMetadata", |
| 2305 | "()V"); |
| 2306 | JPEGImageWriter_grabPixelsID = (*env)->GetMethodID(env, |
| 2307 | cls, |
| 2308 | "grabPixels", |
| 2309 | "(I)V"); |
| 2310 | |
| 2311 | JPEGQTable_tableID = (*env)->GetFieldID(env, |
| 2312 | qTableClass, |
| 2313 | "qTable", |
| 2314 | "[I"); |
| 2315 | |
| 2316 | JPEGHuffmanTable_lengthsID = (*env)->GetFieldID(env, |
| 2317 | huffClass, |
| 2318 | "lengths", |
| 2319 | "[S"); |
| 2320 | |
| 2321 | JPEGHuffmanTable_valuesID = (*env)->GetFieldID(env, |
| 2322 | huffClass, |
| 2323 | "values", |
| 2324 | "[S"); |
| 2325 | } |
| 2326 | |
| 2327 | JNIEXPORT jlong JNICALL |
| 2328 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter |
| 2329 | (JNIEnv *env, |
| 2330 | jobject this) { |
| 2331 | |
| 2332 | imageIODataPtr ret; |
| 2333 | struct sun_jpeg_error_mgr *jerr; |
| 2334 | struct jpeg_destination_mgr *dest; |
| 2335 | |
| 2336 | /* This struct contains the JPEG compression parameters and pointers to |
| 2337 | * working space (which is allocated as needed by the JPEG library). |
| 2338 | */ |
| 2339 | struct jpeg_compress_struct *cinfo = |
| 2340 | malloc(sizeof(struct jpeg_compress_struct)); |
| 2341 | if (cinfo == NULL) { |
| 2342 | JNU_ThrowByName( env, |
| 2343 | "java/lang/OutOfMemoryError", |
| 2344 | "Initializing Writer"); |
| 2345 | return 0; |
| 2346 | } |
| 2347 | |
| 2348 | /* We use our private extension JPEG error handler. |
| 2349 | */ |
| 2350 | jerr = malloc (sizeof(struct sun_jpeg_error_mgr)); |
| 2351 | if (jerr == NULL) { |
| 2352 | JNU_ThrowByName( env, |
| 2353 | "java/lang/OutOfMemoryError", |
| 2354 | "Initializing Writer"); |
| 2355 | free(cinfo); |
| 2356 | return 0; |
| 2357 | } |
| 2358 | |
| 2359 | /* We set up the normal JPEG error routines, then override error_exit. */ |
| 2360 | cinfo->err = jpeg_std_error(&(jerr->pub)); |
| 2361 | jerr->pub.error_exit = sun_jpeg_error_exit; |
| 2362 | /* We need to setup our own print routines */ |
| 2363 | jerr->pub.output_message = sun_jpeg_output_message; |
| 2364 | /* Now we can setjmp before every call to the library */ |
| 2365 | |
| 2366 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 2367 | if (setjmp(jerr->setjmp_buffer)) { |
| 2368 | /* If we get here, the JPEG code has signaled an error. */ |
| 2369 | char buffer[JMSG_LENGTH_MAX]; |
| 2370 | (*cinfo->err->format_message) ((struct jpeg_common_struct *) cinfo, |
| 2371 | buffer); |
| 2372 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 2373 | return 0; |
| 2374 | } |
| 2375 | |
| 2376 | /* Perform library initialization */ |
| 2377 | jpeg_create_compress(cinfo); |
| 2378 | |
| 2379 | /* Now set up the destination */ |
| 2380 | dest = malloc(sizeof(struct jpeg_destination_mgr)); |
| 2381 | if (dest == NULL) { |
| 2382 | JNU_ThrowByName( env, |
| 2383 | "java/lang/OutOfMemoryError", |
| 2384 | "Initializing Writer"); |
| 2385 | free(cinfo); |
| 2386 | free(jerr); |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | dest->init_destination = imageio_init_destination; |
| 2391 | dest->empty_output_buffer = imageio_empty_output_buffer; |
| 2392 | dest->term_destination = imageio_term_destination; |
| 2393 | dest->next_output_byte = NULL; |
| 2394 | dest->free_in_buffer = 0; |
| 2395 | |
| 2396 | cinfo->dest = dest; |
| 2397 | |
| 2398 | /* set up the association to persist for future calls */ |
| 2399 | ret = initImageioData(env, (j_common_ptr) cinfo, this); |
| 2400 | if (ret == NULL) { |
| 2401 | JNU_ThrowByName( env, |
| 2402 | "java/lang/OutOfMemoryError", |
| 2403 | "Initializing Writer"); |
| 2404 | free(cinfo); |
| 2405 | free(jerr); |
| 2406 | return 0; |
| 2407 | } |
| 2408 | return (jlong) ret; |
| 2409 | } |
| 2410 | |
| 2411 | JNIEXPORT void JNICALL |
| 2412 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_setDest |
| 2413 | (JNIEnv *env, |
| 2414 | jobject this, |
| 2415 | jlong ptr, |
| 2416 | jobject destination) { |
| 2417 | |
| 2418 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2419 | j_compress_ptr cinfo; |
| 2420 | |
| 2421 | if (data == NULL) { |
| 2422 | JNU_ThrowByName(env, |
| 2423 | "java/lang/IllegalStateException", |
| 2424 | "Attempting to use writer after dispose()"); |
| 2425 | return; |
| 2426 | } |
| 2427 | |
| 2428 | cinfo = (j_compress_ptr) data->jpegObj; |
| 2429 | |
| 2430 | imageio_set_stream(env, data->jpegObj, data, destination); |
| 2431 | |
| 2432 | |
| 2433 | // Don't call the init method, as that depends on pinned arrays |
| 2434 | cinfo->dest->next_output_byte = NULL; |
| 2435 | cinfo->dest->free_in_buffer = 0; |
| 2436 | } |
| 2437 | |
| 2438 | JNIEXPORT void JNICALL |
| 2439 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeTables |
| 2440 | (JNIEnv *env, |
| 2441 | jobject this, |
| 2442 | jlong ptr, |
| 2443 | jobjectArray qtables, |
| 2444 | jobjectArray DCHuffmanTables, |
| 2445 | jobjectArray ACHuffmanTables) { |
| 2446 | |
| 2447 | struct jpeg_destination_mgr *dest; |
| 2448 | sun_jpeg_error_ptr jerr; |
| 2449 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2450 | j_compress_ptr cinfo; |
| 2451 | |
| 2452 | if (data == NULL) { |
| 2453 | JNU_ThrowByName(env, |
| 2454 | "java/lang/IllegalStateException", |
| 2455 | "Attempting to use writer after dispose()"); |
| 2456 | return; |
| 2457 | } |
| 2458 | |
| 2459 | cinfo = (j_compress_ptr) data->jpegObj; |
| 2460 | dest = cinfo->dest; |
| 2461 | |
| 2462 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 2463 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 2464 | |
| 2465 | if (setjmp(jerr->setjmp_buffer)) { |
| 2466 | /* If we get here, the JPEG code has signaled an error |
| 2467 | while writing. */ |
| 2468 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2469 | if (!(*env)->ExceptionOccurred(env)) { |
| 2470 | char buffer[JMSG_LENGTH_MAX]; |
| 2471 | (*cinfo->err->format_message) ((j_common_ptr) cinfo, |
| 2472 | buffer); |
| 2473 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 2474 | } |
| 2475 | return; |
| 2476 | } |
| 2477 | |
| 2478 | if (GET_ARRAYS(env, data, |
| 2479 | (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) { |
| 2480 | JNU_ThrowByName(env, |
| 2481 | "javax/imageio/IIOException", |
| 2482 | "Array pin failed"); |
| 2483 | return; |
| 2484 | } |
| 2485 | |
| 2486 | jpeg_suppress_tables(cinfo, TRUE); // Suppress writing of any current |
| 2487 | |
| 2488 | data->streamBuf.suspendable = FALSE; |
| 2489 | if (qtables != NULL) { |
| 2490 | #ifdef DEBUG |
| 2491 | printf("in writeTables: qtables not NULL\n"); |
| 2492 | #endif |
| 2493 | setQTables(env, (j_common_ptr) cinfo, qtables, TRUE); |
| 2494 | } |
| 2495 | |
| 2496 | if (DCHuffmanTables != NULL) { |
| 2497 | setHTables(env, (j_common_ptr) cinfo, |
| 2498 | DCHuffmanTables, ACHuffmanTables, TRUE); |
| 2499 | } |
| 2500 | |
| 2501 | jpeg_write_tables(cinfo); // Flushes the buffer for you |
| 2502 | RELEASE_ARRAYS(env, data, NULL); |
| 2503 | } |
| 2504 | |
| 2505 | JNIEXPORT jboolean JNICALL |
| 2506 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_writeImage |
| 2507 | (JNIEnv *env, |
| 2508 | jobject this, |
| 2509 | jlong ptr, |
| 2510 | jbyteArray buffer, |
| 2511 | jint inCs, jint outCs, |
| 2512 | jint numBands, |
| 2513 | jintArray bandSizes, |
| 2514 | jint srcWidth, |
| 2515 | jint destWidth, jint destHeight, |
| 2516 | jint stepX, jint stepY, |
| 2517 | jobjectArray qtables, |
| 2518 | jboolean writeDQT, |
| 2519 | jobjectArray DCHuffmanTables, |
| 2520 | jobjectArray ACHuffmanTables, |
| 2521 | jboolean writeDHT, |
| 2522 | jboolean optimize, |
| 2523 | jboolean progressive, |
| 2524 | jint numScans, |
| 2525 | jintArray scanInfo, |
| 2526 | jintArray componentIds, |
| 2527 | jintArray HsamplingFactors, |
| 2528 | jintArray VsamplingFactors, |
| 2529 | jintArray QtableSelectors, |
| 2530 | jboolean haveMetadata, |
| 2531 | jint restartInterval) { |
| 2532 | |
| 2533 | struct jpeg_destination_mgr *dest; |
| 2534 | JSAMPROW scanLinePtr; |
| 2535 | int i, j; |
| 2536 | int pixelStride; |
| 2537 | unsigned char *in, *out, *pixelLimit; |
| 2538 | int targetLine; |
| 2539 | pixelBufferPtr pb; |
| 2540 | sun_jpeg_error_ptr jerr; |
| 2541 | jint *ids, *hfactors, *vfactors, *qsels; |
| 2542 | jsize qlen, hlen; |
| 2543 | int *scanptr; |
| 2544 | jint *scanData; |
| 2545 | jint *bandSize; |
| 2546 | int maxBandValue, halfMaxBandValue; |
| 2547 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2548 | j_compress_ptr cinfo; |
| 2549 | UINT8** scale = NULL; |
| 2550 | |
| 2551 | /* verify the inputs */ |
| 2552 | |
| 2553 | if (data == NULL) { |
| 2554 | JNU_ThrowByName(env, |
| 2555 | "java/lang/IllegalStateException", |
| 2556 | "Attempting to use writer after dispose()"); |
| 2557 | return JNI_FALSE; |
| 2558 | } |
| 2559 | |
| 2560 | if ((buffer == NULL) || |
| 2561 | (qtables == NULL) || |
| 2562 | // H tables can be null if optimizing |
| 2563 | (componentIds == NULL) || |
| 2564 | (HsamplingFactors == NULL) || (VsamplingFactors == NULL) || |
| 2565 | (QtableSelectors == NULL) || |
| 2566 | ((numScans != 0) && (scanInfo != NULL))) { |
| 2567 | |
| 2568 | JNU_ThrowNullPointerException(env, 0); |
| 2569 | return JNI_FALSE; |
| 2570 | |
| 2571 | } |
| 2572 | |
| 2573 | if ((inCs < 0) || (inCs > JCS_YCCK) || |
| 2574 | (outCs < 0) || (outCs > JCS_YCCK) || |
| 2575 | (numBands < 1) || (numBands > MAX_BANDS) || |
| 2576 | (srcWidth < 0) || |
| 2577 | (destWidth < 0) || (destWidth > srcWidth) || |
| 2578 | (destHeight < 0) || |
| 2579 | (stepX < 0) || (stepY < 0)) |
| 2580 | { |
| 2581 | JNU_ThrowByName(env, "javax/imageio/IIOException", |
| 2582 | "Invalid argument to native writeImage"); |
| 2583 | return JNI_FALSE; |
| 2584 | } |
| 2585 | |
| 2586 | bandSize = (*env)->GetIntArrayElements(env, bandSizes, NULL); |
| 2587 | |
| 2588 | for (i = 0; i < numBands; i++) { |
| 2589 | if (bandSize[i] != JPEG_BAND_SIZE) { |
| 2590 | if (scale == NULL) { |
| 2591 | scale = (UINT8**) calloc(numBands, sizeof(UINT8*)); |
| 2592 | |
| 2593 | if (scale == NULL) { |
| 2594 | JNU_ThrowByName( env, "java/lang/OutOfMemoryError", |
| 2595 | "Writing JPEG Stream"); |
| 2596 | return JNI_FALSE; |
| 2597 | } |
| 2598 | } |
| 2599 | |
| 2600 | maxBandValue = (1 << bandSize[i]) - 1; |
| 2601 | |
| 2602 | scale[i] = (UINT8*) malloc((maxBandValue + 1) * sizeof(UINT8)); |
| 2603 | |
| 2604 | if (scale[i] == NULL) { |
| 2605 | JNU_ThrowByName( env, "java/lang/OutOfMemoryError", |
| 2606 | "Writing JPEG Stream"); |
| 2607 | return JNI_FALSE; |
| 2608 | } |
| 2609 | |
| 2610 | halfMaxBandValue = maxBandValue >> 1; |
| 2611 | |
| 2612 | for (j = 0; j <= maxBandValue; j++) { |
| 2613 | scale[i][j] = (UINT8) |
| 2614 | ((j*MAX_JPEG_BAND_VALUE + halfMaxBandValue)/maxBandValue); |
| 2615 | } |
| 2616 | } |
| 2617 | } |
| 2618 | |
| 2619 | (*env)->ReleaseIntArrayElements(env, bandSizes, |
| 2620 | bandSize, JNI_ABORT); |
| 2621 | |
| 2622 | cinfo = (j_compress_ptr) data->jpegObj; |
| 2623 | dest = cinfo->dest; |
| 2624 | |
| 2625 | /* Set the buffer as our PixelBuffer */ |
| 2626 | pb = &data->pixelBuf; |
| 2627 | |
| 2628 | if (setPixelBuffer(env, pb, buffer) == NOT_OK) { |
| 2629 | return data->abortFlag; // We already threw an out of memory exception |
| 2630 | } |
| 2631 | |
| 2632 | // Allocate a 1-scanline buffer |
| 2633 | scanLinePtr = (JSAMPROW)malloc(destWidth*numBands); |
| 2634 | if (scanLinePtr == NULL) { |
| 2635 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2636 | JNU_ThrowByName( env, |
| 2637 | "java/lang/OutOfMemoryError", |
| 2638 | "Writing JPEG Stream"); |
| 2639 | return data->abortFlag; |
| 2640 | } |
| 2641 | |
| 2642 | /* Establish the setjmp return context for sun_jpeg_error_exit to use. */ |
| 2643 | jerr = (sun_jpeg_error_ptr) cinfo->err; |
| 2644 | |
| 2645 | if (setjmp(jerr->setjmp_buffer)) { |
| 2646 | /* If we get here, the JPEG code has signaled an error |
| 2647 | while writing. */ |
| 2648 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2649 | if (!(*env)->ExceptionOccurred(env)) { |
| 2650 | char buffer[JMSG_LENGTH_MAX]; |
| 2651 | (*cinfo->err->format_message) ((j_common_ptr) cinfo, |
| 2652 | buffer); |
| 2653 | JNU_ThrowByName(env, "javax/imageio/IIOException", buffer); |
| 2654 | } |
| 2655 | free(scanLinePtr); |
| 2656 | return data->abortFlag; |
| 2657 | } |
| 2658 | |
| 2659 | // set up parameters |
| 2660 | cinfo->image_width = destWidth; |
| 2661 | cinfo->image_height = destHeight; |
| 2662 | cinfo->input_components = numBands; |
| 2663 | cinfo->in_color_space = inCs; |
| 2664 | |
| 2665 | jpeg_set_defaults(cinfo); |
| 2666 | |
| 2667 | jpeg_set_colorspace(cinfo, outCs); |
| 2668 | |
| 2669 | cinfo->optimize_coding = optimize; |
| 2670 | |
| 2671 | cinfo->write_JFIF_header = FALSE; |
| 2672 | cinfo->write_Adobe_marker = FALSE; |
| 2673 | // copy componentIds |
| 2674 | ids = (*env)->GetIntArrayElements(env, componentIds, NULL); |
| 2675 | hfactors = (*env)->GetIntArrayElements(env, HsamplingFactors, NULL); |
| 2676 | vfactors = (*env)->GetIntArrayElements(env, VsamplingFactors, NULL); |
| 2677 | qsels = (*env)->GetIntArrayElements(env, QtableSelectors, NULL); |
| 2678 | |
| 2679 | if ((ids == NULL) || |
| 2680 | (hfactors == NULL) || (vfactors == NULL) || |
| 2681 | (qsels == NULL)) { |
| 2682 | JNU_ThrowByName( env, |
| 2683 | "java/lang/OutOfMemoryError", |
| 2684 | "Writing JPEG"); |
| 2685 | return JNI_FALSE; |
| 2686 | } |
| 2687 | |
| 2688 | for (i = 0; i < numBands; i++) { |
| 2689 | cinfo->comp_info[i].component_id = ids[i]; |
| 2690 | cinfo->comp_info[i].h_samp_factor = hfactors[i]; |
| 2691 | cinfo->comp_info[i].v_samp_factor = vfactors[i]; |
| 2692 | cinfo->comp_info[i].quant_tbl_no = qsels[i]; |
| 2693 | } |
| 2694 | |
| 2695 | (*env)->ReleaseIntArrayElements(env, componentIds, |
| 2696 | ids, JNI_ABORT); |
| 2697 | (*env)->ReleaseIntArrayElements(env, HsamplingFactors, |
| 2698 | hfactors, JNI_ABORT); |
| 2699 | (*env)->ReleaseIntArrayElements(env, VsamplingFactors, |
| 2700 | vfactors, JNI_ABORT); |
| 2701 | (*env)->ReleaseIntArrayElements(env, QtableSelectors, |
| 2702 | qsels, JNI_ABORT); |
| 2703 | |
| 2704 | jpeg_suppress_tables(cinfo, TRUE); // Disable writing any current |
| 2705 | |
| 2706 | qlen = setQTables(env, (j_common_ptr) cinfo, qtables, writeDQT); |
| 2707 | |
| 2708 | if (!optimize) { |
| 2709 | // Set the h tables |
| 2710 | hlen = setHTables(env, |
| 2711 | (j_common_ptr) cinfo, |
| 2712 | DCHuffmanTables, |
| 2713 | ACHuffmanTables, |
| 2714 | writeDHT); |
| 2715 | } |
| 2716 | |
| 2717 | if (GET_ARRAYS(env, data, |
| 2718 | (const JOCTET **)(&dest->next_output_byte)) == NOT_OK) { |
| 2719 | JNU_ThrowByName(env, |
| 2720 | "javax/imageio/IIOException", |
| 2721 | "Array pin failed"); |
| 2722 | return data->abortFlag; |
| 2723 | } |
| 2724 | |
| 2725 | data->streamBuf.suspendable = FALSE; |
| 2726 | |
| 2727 | if (progressive) { |
| 2728 | if (numScans == 0) { // then use default scans |
| 2729 | jpeg_simple_progression(cinfo); |
| 2730 | } else { |
| 2731 | cinfo->num_scans = numScans; |
| 2732 | // Copy the scanInfo to a local array |
| 2733 | // The following is copied from jpeg_simple_progression: |
| 2734 | /* Allocate space for script. |
| 2735 | * We need to put it in the permanent pool in case the application performs |
| 2736 | * multiple compressions without changing the settings. To avoid a memory |
| 2737 | * leak if jpeg_simple_progression is called repeatedly for the same JPEG |
| 2738 | * object, we try to re-use previously allocated space, and we allocate |
| 2739 | * enough space to handle YCbCr even if initially asked for grayscale. |
| 2740 | */ |
| 2741 | if (cinfo->script_space == NULL |
| 2742 | || cinfo->script_space_size < numScans) { |
| 2743 | cinfo->script_space_size = MAX(numScans, 10); |
| 2744 | cinfo->script_space = (jpeg_scan_info *) |
| 2745 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, |
| 2746 | JPOOL_PERMANENT, |
| 2747 | cinfo->script_space_size |
| 2748 | * sizeof(jpeg_scan_info)); |
| 2749 | } |
| 2750 | cinfo->scan_info = cinfo->script_space; |
| 2751 | scanptr = (int *) cinfo->script_space; |
| 2752 | scanData = (*env)->GetIntArrayElements(env, scanInfo, NULL); |
| 2753 | // number of jints per scan is 9 |
| 2754 | // We avoid a memcpy to handle different size ints |
| 2755 | for (i = 0; i < numScans*9; i++) { |
| 2756 | scanptr[i] = scanData[i]; |
| 2757 | } |
| 2758 | (*env)->ReleaseIntArrayElements(env, scanInfo, |
| 2759 | scanData, JNI_ABORT); |
| 2760 | |
| 2761 | } |
| 2762 | } |
| 2763 | |
| 2764 | cinfo->restart_interval = restartInterval; |
| 2765 | |
| 2766 | #ifdef DEBUG |
| 2767 | printf("writer setup complete, starting compressor\n"); |
| 2768 | #endif |
| 2769 | |
| 2770 | // start the compressor; tables must already be set |
| 2771 | jpeg_start_compress(cinfo, FALSE); // Leaves sent_table alone |
| 2772 | |
| 2773 | if (haveMetadata) { |
| 2774 | // Flush the buffer |
| 2775 | imageio_flush_destination(cinfo); |
| 2776 | // Call Java to write the metadata |
| 2777 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2778 | (*env)->CallVoidMethod(env, |
| 2779 | this, |
| 2780 | JPEGImageWriter_writeMetadataID); |
| 2781 | if ((*env)->ExceptionOccurred(env) |
| 2782 | || !GET_ARRAYS(env, data, |
| 2783 | (const JOCTET **)(&dest->next_output_byte))) { |
| 2784 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 2785 | } |
| 2786 | } |
| 2787 | |
| 2788 | targetLine = 0; |
| 2789 | |
| 2790 | // for each line in destHeight |
| 2791 | while ((data->abortFlag == JNI_FALSE) |
| 2792 | && (cinfo->next_scanline < cinfo->image_height)) { |
| 2793 | // get the line from Java |
| 2794 | RELEASE_ARRAYS(env, data, (const JOCTET *)(dest->next_output_byte)); |
| 2795 | (*env)->CallVoidMethod(env, |
| 2796 | this, |
| 2797 | JPEGImageWriter_grabPixelsID, |
| 2798 | targetLine); |
| 2799 | if ((*env)->ExceptionOccurred(env) |
| 2800 | || !GET_ARRAYS(env, data, |
| 2801 | (const JOCTET **)(&dest->next_output_byte))) { |
| 2802 | cinfo->err->error_exit((j_common_ptr) cinfo); |
| 2803 | } |
| 2804 | |
| 2805 | // subsample it into our buffer |
| 2806 | |
| 2807 | in = data->pixelBuf.buf.bp; |
| 2808 | out = scanLinePtr; |
| 2809 | pixelLimit = in + srcWidth*numBands; |
| 2810 | pixelStride = numBands*stepX; |
| 2811 | for (; in < pixelLimit; in += pixelStride) { |
| 2812 | for (i = 0; i < numBands; i++) { |
| 2813 | if (scale !=NULL && scale[i] != NULL) { |
| 2814 | *out++ = scale[i][*(in+i)]; |
| 2815 | #ifdef DEBUG |
| 2816 | if (in == data->pixelBuf.buf.bp){ // Just the first pixel |
| 2817 | printf("in %d -> out %d, ", *(in+i), *(out-i-1)); |
| 2818 | } |
| 2819 | #endif |
| 2820 | |
| 2821 | #ifdef DEBUG |
| 2822 | if (in == data->pixelBuf.buf.bp){ // Just the first pixel |
| 2823 | printf("\n"); |
| 2824 | } |
| 2825 | #endif |
| 2826 | } else { |
| 2827 | *out++ = *(in+i); |
| 2828 | } |
| 2829 | } |
| 2830 | } |
| 2831 | // write it out |
| 2832 | jpeg_write_scanlines(cinfo, (JSAMPARRAY)&scanLinePtr, 1); |
| 2833 | targetLine += stepY; |
| 2834 | } |
| 2835 | |
| 2836 | /* |
| 2837 | * We are done, but we might not have done all the lines, |
| 2838 | * so use jpeg_abort instead of jpeg_finish_compress. |
| 2839 | */ |
| 2840 | if (cinfo->next_scanline == cinfo->image_height) { |
| 2841 | jpeg_finish_compress(cinfo); // Flushes buffer with term_dest |
| 2842 | } else { |
| 2843 | jpeg_abort((j_common_ptr)cinfo); |
| 2844 | } |
| 2845 | |
| 2846 | if (scale != NULL) { |
| 2847 | for (i = 0; i < numBands; i++) { |
| 2848 | if (scale[i] != NULL) { |
| 2849 | free(scale[i]); |
| 2850 | } |
| 2851 | } |
| 2852 | free(scale); |
| 2853 | } |
| 2854 | |
| 2855 | free(scanLinePtr); |
| 2856 | RELEASE_ARRAYS(env, data, NULL); |
| 2857 | return data->abortFlag; |
| 2858 | } |
| 2859 | |
| 2860 | JNIEXPORT void JNICALL |
| 2861 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_abortWrite |
| 2862 | (JNIEnv *env, |
| 2863 | jobject this, |
| 2864 | jlong ptr) { |
| 2865 | |
| 2866 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2867 | |
| 2868 | if (data == NULL) { |
| 2869 | JNU_ThrowByName(env, |
| 2870 | "java/lang/IllegalStateException", |
| 2871 | "Attempting to use writer after dispose()"); |
| 2872 | return; |
| 2873 | } |
| 2874 | |
| 2875 | imageio_abort(env, this, data); |
| 2876 | } |
| 2877 | |
| 2878 | JNIEXPORT void JNICALL |
| 2879 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_resetWriter |
| 2880 | (JNIEnv *env, |
| 2881 | jobject this, |
| 2882 | jlong ptr) { |
| 2883 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2884 | j_compress_ptr cinfo; |
| 2885 | |
| 2886 | if (data == NULL) { |
| 2887 | JNU_ThrowByName(env, |
| 2888 | "java/lang/IllegalStateException", |
| 2889 | "Attempting to use writer after dispose()"); |
| 2890 | return; |
| 2891 | } |
| 2892 | |
| 2893 | cinfo = (j_compress_ptr) data->jpegObj; |
| 2894 | |
| 2895 | imageio_reset(env, (j_common_ptr) cinfo, data); |
| 2896 | |
| 2897 | /* |
| 2898 | * The tables have not been reset, and there is no way to do so |
| 2899 | * in IJG without leaking memory. The only situation in which |
| 2900 | * this will cause a problem is if an image-only stream is written |
| 2901 | * with this object without initializing the correct tables first, |
| 2902 | * which should not be possible. |
| 2903 | */ |
| 2904 | |
| 2905 | cinfo->dest->next_output_byte = NULL; |
| 2906 | cinfo->dest->free_in_buffer = 0; |
| 2907 | } |
| 2908 | |
| 2909 | JNIEXPORT void JNICALL |
| 2910 | Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_disposeWriter |
| 2911 | (JNIEnv *env, |
| 2912 | jclass writer, |
| 2913 | jlong ptr) { |
| 2914 | |
| 2915 | imageIODataPtr data = (imageIODataPtr) ptr; |
| 2916 | j_common_ptr info = destroyImageioData(env, data); |
| 2917 | |
| 2918 | imageio_dispose(info); |
| 2919 | } |