1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "../../../include/fxcodec/fx_codec.h" 8 #include "../../../include/fxge/fx_dib.h" 9 #include "codec_int.h" 10 extern "C" { 11 static void _JpegScanSOI(const FX_BYTE*& src_buf, FX_DWORD& src_size) 12 { 13 if (src_size == 0) { 14 return; 15 } 16 FX_DWORD offset = 0; 17 while (offset < src_size - 1) { 18 if (src_buf[offset] == 0xff && src_buf[offset + 1] == 0xd8) { 19 src_buf += offset; 20 src_size -= offset; 21 return; 22 } 23 offset ++; 24 } 25 } 26 }; 27 extern "C" { 28 #undef FAR 29 #include "../../fx_jpeglib.h" 30 } 31 extern "C" { 32 static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {} 33 }; 34 extern "C" { 35 static void _error_fatal(j_common_ptr cinfo) 36 { 37 longjmp(*(jmp_buf*)cinfo->client_data, -1); 38 } 39 }; 40 extern "C" { 41 static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num) 42 { 43 if (num > (long)cinfo->src->bytes_in_buffer) { 44 _error_fatal((j_common_ptr)cinfo); 45 } 46 cinfo->src->next_input_byte += num; 47 cinfo->src->bytes_in_buffer -= num; 48 } 49 }; 50 extern "C" { 51 static boolean _src_fill_buffer(j_decompress_ptr cinfo) 52 { 53 return 0; 54 } 55 }; 56 extern "C" { 57 static boolean _src_resync(j_decompress_ptr cinfo, int desired) 58 { 59 return 0; 60 } 61 }; 62 extern "C" { 63 static void _error_do_nothing(j_common_ptr cinfo) {} 64 }; 65 extern "C" { 66 static void _error_do_nothing1(j_common_ptr cinfo, int) {} 67 }; 68 extern "C" { 69 static void _error_do_nothing2(j_common_ptr cinfo, char*) {} 70 }; 71 #define JPEG_MARKER_EXIF (JPEG_APP0 + 1) 72 #define JPEG_MARKER_ICC (JPEG_APP0 + 2) 73 #define JPEG_MARKER_AUTHORTIME (JPEG_APP0 + 3) 74 #define JPEG_MARKER_MAXSIZE 0xFFFF 75 #define JPEG_OVERHEAD_LEN 14 76 static FX_BOOL _JpegIsIccMarker(jpeg_saved_marker_ptr marker) 77 { 78 if (marker->marker == JPEG_MARKER_ICC && 79 marker->data_length >= JPEG_OVERHEAD_LEN && 80 (FXSYS_memcmp32(marker->data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00", 12) == 0)) { 81 return TRUE; 82 } 83 return FALSE; 84 } 85 static FX_BOOL _JpegLoadIccProfile(j_decompress_ptr cinfo, FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) 86 { 87 if(icc_buf_ptr == NULL || icc_length == NULL) { 88 return FALSE; 89 } 90 *icc_buf_ptr = NULL; 91 *icc_length = 0; 92 FX_LPBYTE icc_data_ptr = NULL; 93 FX_DWORD icc_data_len = 0; 94 FX_BYTE count_icc_marker = 0; 95 FX_BYTE num_icc_marker = 0; 96 jpeg_saved_marker_ptr marker_list[256] = {NULL}; 97 for (jpeg_saved_marker_ptr cur_marker = cinfo->marker_list; 98 cur_marker != NULL; 99 cur_marker = cur_marker->next) { 100 if(_JpegIsIccMarker(cur_marker)) { 101 if(count_icc_marker == 0) { 102 num_icc_marker = cur_marker->data[13]; 103 } else if(num_icc_marker != cur_marker->data[13]) { 104 return FALSE; 105 } 106 int sn = cur_marker->data[12] - 1; 107 if(sn < 0 || sn >= num_icc_marker) { 108 return FALSE; 109 } 110 if(marker_list[sn] == NULL) { 111 marker_list[sn] = cur_marker; 112 } else { 113 return FALSE; 114 } 115 count_icc_marker ++; 116 icc_data_len += (cur_marker->data_length - JPEG_OVERHEAD_LEN); 117 } 118 } 119 if(count_icc_marker != num_icc_marker) { 120 return FALSE; 121 } 122 if(num_icc_marker == 0) { 123 return TRUE; 124 } 125 icc_data_ptr = FX_Alloc(FX_BYTE, icc_data_len); 126 if(icc_buf_ptr == NULL) { 127 return FALSE; 128 } 129 *icc_buf_ptr = icc_data_ptr; 130 *icc_length = icc_data_len; 131 for (int idx = 0; idx < num_icc_marker; idx++) { 132 icc_data_len = marker_list[idx]->data_length - JPEG_OVERHEAD_LEN; 133 FXSYS_memcpy32(icc_data_ptr, marker_list[idx]->data + JPEG_OVERHEAD_LEN, icc_data_len); 134 icc_data_ptr += icc_data_len; 135 } 136 return TRUE; 137 } 138 static FX_BOOL _JpegEmbedIccProfile(j_compress_ptr cinfo, FX_LPCBYTE icc_buf_ptr, FX_DWORD icc_length) 139 { 140 if(icc_buf_ptr == NULL || icc_length == 0) { 141 return FALSE; 142 } 143 FX_DWORD icc_segment_size = (JPEG_MARKER_MAXSIZE - 2 - JPEG_OVERHEAD_LEN); 144 FX_DWORD icc_segment_num = (icc_length / icc_segment_size) + 1; 145 if (icc_segment_num > 255) { 146 return FALSE; 147 } 148 FX_DWORD icc_data_length = JPEG_OVERHEAD_LEN + (icc_segment_num > 1 ? icc_segment_size : icc_length); 149 FX_LPBYTE icc_data = FX_Alloc(FX_BYTE, icc_data_length); 150 if (icc_data == NULL) { 151 return FALSE; 152 } 153 FXSYS_memcpy32(icc_data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00", 12); 154 icc_data[13] = (FX_BYTE)icc_segment_num; 155 for (FX_BYTE i = 0; i < (icc_segment_num - 1); i++) { 156 icc_data[12] = i + 1; 157 FXSYS_memcpy32(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + i * icc_segment_size, icc_segment_size); 158 jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, icc_data_length); 159 } 160 icc_data[12] = (FX_BYTE)icc_segment_num; 161 FX_DWORD icc_size = (icc_segment_num - 1) * icc_segment_size; 162 FXSYS_memcpy32(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + icc_size, icc_length - icc_size); 163 jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, JPEG_OVERHEAD_LEN + icc_length - icc_size); 164 FX_Free(icc_data); 165 return TRUE; 166 } 167 extern "C" { 168 static void _dest_do_nothing(j_compress_ptr cinfo) {} 169 }; 170 extern "C" { 171 static boolean _dest_empty(j_compress_ptr cinfo) 172 { 173 return FALSE; 174 } 175 }; 176 #define JPEG_BLOCK_SIZE 1048576 177 static void _JpegEncode(const CFX_DIBSource* pSource, FX_LPBYTE& dest_buf, FX_STRSIZE& dest_size, int quality, FX_LPCBYTE icc_buf, FX_DWORD icc_length) 178 { 179 struct jpeg_compress_struct cinfo; 180 struct jpeg_error_mgr jerr; 181 jerr.error_exit = _error_do_nothing; 182 jerr.emit_message = _error_do_nothing1; 183 jerr.output_message = _error_do_nothing; 184 jerr.format_message = _error_do_nothing2; 185 jerr.reset_error_mgr = _error_do_nothing; 186 cinfo.err = &jerr; 187 jpeg_create_compress(&cinfo); 188 int Bpp = pSource->GetBPP() / 8; 189 int nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1; 190 int pitch = pSource->GetPitch(); 191 int width = pSource->GetWidth(); 192 int height = pSource->GetHeight(); 193 FX_DWORD dest_buf_length = width * height * nComponents + 1024 + (icc_length ? (icc_length + 255 * 18) : 0); 194 dest_buf = FX_Alloc(FX_BYTE, dest_buf_length); 195 while (dest_buf == NULL) { 196 dest_buf_length >>= 1; 197 dest_buf = FX_Alloc(FX_BYTE, dest_buf_length); 198 } 199 FXSYS_memset32(dest_buf, 0, dest_buf_length); 200 struct jpeg_destination_mgr dest; 201 dest.init_destination = _dest_do_nothing; 202 dest.term_destination = _dest_do_nothing; 203 dest.empty_output_buffer = _dest_empty; 204 dest.next_output_byte = dest_buf; 205 dest.free_in_buffer = dest_buf_length; 206 cinfo.dest = &dest; 207 cinfo.image_width = width; 208 cinfo.image_height = height; 209 cinfo.input_components = nComponents; 210 if (nComponents == 1) { 211 cinfo.in_color_space = JCS_GRAYSCALE; 212 } else if (nComponents == 3) { 213 cinfo.in_color_space = JCS_RGB; 214 } else { 215 cinfo.in_color_space = JCS_CMYK; 216 } 217 FX_LPBYTE line_buf = NULL; 218 if (nComponents > 1) { 219 line_buf = FX_Alloc(FX_BYTE, width * nComponents); 220 if (line_buf == NULL) { 221 return; 222 } 223 } 224 jpeg_set_defaults(&cinfo); 225 if(quality != 75) { 226 jpeg_set_quality(&cinfo, quality, TRUE); 227 } 228 jpeg_start_compress(&cinfo, TRUE); 229 _JpegEmbedIccProfile(&cinfo, icc_buf, icc_length); 230 JSAMPROW row_pointer[1]; 231 JDIMENSION row; 232 while (cinfo.next_scanline < cinfo.image_height) { 233 FX_LPCBYTE src_scan = pSource->GetScanline(cinfo.next_scanline); 234 if (nComponents > 1) { 235 FX_LPBYTE dest_scan = line_buf; 236 if (nComponents == 3) { 237 for (int i = 0; i < width; i ++) { 238 dest_scan[0] = src_scan[2]; 239 dest_scan[1] = src_scan[1]; 240 dest_scan[2] = src_scan[0]; 241 dest_scan += 3; 242 src_scan += Bpp; 243 } 244 } else { 245 for (int i = 0; i < pitch; i ++) { 246 *dest_scan++ = ~*src_scan++; 247 } 248 } 249 row_pointer[0] = line_buf; 250 } else { 251 row_pointer[0] = (FX_LPBYTE)src_scan; 252 } 253 row = cinfo.next_scanline; 254 jpeg_write_scanlines(&cinfo, row_pointer, 1); 255 if (cinfo.next_scanline == row) { 256 dest_buf = FX_Realloc(FX_BYTE, dest_buf, dest_buf_length + JPEG_BLOCK_SIZE); 257 if (dest_buf == NULL) { 258 FX_Free(line_buf); 259 return; 260 } 261 dest.next_output_byte = dest_buf + dest_buf_length - dest.free_in_buffer; 262 dest_buf_length += JPEG_BLOCK_SIZE; 263 dest.free_in_buffer += JPEG_BLOCK_SIZE; 264 } 265 } 266 jpeg_finish_compress(&cinfo); 267 jpeg_destroy_compress(&cinfo); 268 if (line_buf) { 269 FX_Free(line_buf); 270 } 271 dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer; 272 } 273 static FX_BOOL _JpegLoadInfo(FX_LPCBYTE src_buf, FX_DWORD src_size, int& width, int& height, 274 int& num_components, int& bits_per_components, FX_BOOL& color_transform, 275 FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) 276 { 277 _JpegScanSOI(src_buf, src_size); 278 struct jpeg_decompress_struct cinfo; 279 struct jpeg_error_mgr jerr; 280 jerr.error_exit = _error_fatal; 281 jerr.emit_message = _error_do_nothing1; 282 jerr.output_message = _error_do_nothing; 283 jerr.format_message = _error_do_nothing2; 284 jerr.reset_error_mgr = _error_do_nothing; 285 cinfo.err = &jerr; 286 jmp_buf mark; 287 cinfo.client_data = &mark; 288 if (setjmp(mark) == -1) { 289 return FALSE; 290 } 291 jpeg_create_decompress(&cinfo); 292 struct jpeg_source_mgr src; 293 src.init_source = _src_do_nothing; 294 src.term_source = _src_do_nothing; 295 src.skip_input_data = _src_skip_data; 296 src.fill_input_buffer = _src_fill_buffer; 297 src.resync_to_restart = _src_resync; 298 src.bytes_in_buffer = src_size; 299 src.next_input_byte = src_buf; 300 cinfo.src = &src; 301 if (setjmp(mark) == -1) { 302 jpeg_destroy_decompress(&cinfo); 303 return FALSE; 304 } 305 if(icc_buf_ptr && icc_length) { 306 jpeg_save_markers(&cinfo, JPEG_MARKER_ICC, JPEG_MARKER_MAXSIZE); 307 } 308 int ret = jpeg_read_header(&cinfo, TRUE); 309 if (ret != JPEG_HEADER_OK) { 310 jpeg_destroy_decompress(&cinfo); 311 return FALSE; 312 } 313 width = cinfo.image_width; 314 height = cinfo.image_height; 315 num_components = cinfo.num_components; 316 color_transform = cinfo.jpeg_color_space == JCS_YCbCr || cinfo.jpeg_color_space == JCS_YCCK; 317 bits_per_components = cinfo.data_precision; 318 if(icc_buf_ptr != NULL) { 319 *icc_buf_ptr = NULL; 320 } 321 if(icc_length != NULL) { 322 *icc_length = 0; 323 } 324 jpeg_destroy_decompress(&cinfo); 325 return TRUE; 326 } 327 class CCodec_JpegDecoder : public CCodec_ScanlineDecoder 328 { 329 public: 330 CCodec_JpegDecoder(); 331 ~CCodec_JpegDecoder(); 332 FX_BOOL Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, int nComps, 333 FX_BOOL ColorTransform, IFX_JpegProvider* pJP); 334 virtual void Destroy() 335 { 336 delete this; 337 } 338 virtual void v_DownScale(int dest_width, int dest_height); 339 virtual FX_BOOL v_Rewind(); 340 virtual FX_LPBYTE v_GetNextLine(); 341 virtual FX_DWORD GetSrcOffset(); 342 jmp_buf m_JmpBuf; 343 struct jpeg_decompress_struct cinfo; 344 struct jpeg_error_mgr jerr; 345 struct jpeg_source_mgr src; 346 FX_LPCBYTE m_SrcBuf; 347 FX_DWORD m_SrcSize; 348 FX_LPBYTE m_pScanlineBuf; 349 FX_BOOL InitDecode(); 350 FX_BOOL m_bInited, m_bStarted, m_bJpegTransform; 351 protected: 352 IFX_JpegProvider* m_pExtProvider; 353 void* m_pExtContext; 354 FX_DWORD m_nDefaultScaleDenom; 355 }; 356 CCodec_JpegDecoder::CCodec_JpegDecoder() 357 { 358 m_pScanlineBuf = NULL; 359 m_DownScale = 1; 360 m_bStarted = FALSE; 361 m_bInited = FALSE; 362 m_pExtProvider = NULL; 363 m_pExtContext = NULL; 364 FXSYS_memset32(&cinfo, 0, sizeof(cinfo)); 365 FXSYS_memset32(&jerr, 0, sizeof(jerr)); 366 FXSYS_memset32(&src, 0, sizeof(src)); 367 m_nDefaultScaleDenom = 1; 368 } 369 CCodec_JpegDecoder::~CCodec_JpegDecoder() 370 { 371 if (m_pExtProvider) { 372 m_pExtProvider->DestroyDecoder(m_pExtContext); 373 return; 374 } 375 if (m_pScanlineBuf) { 376 FX_Free(m_pScanlineBuf); 377 } 378 if (m_bInited) { 379 jpeg_destroy_decompress(&cinfo); 380 } 381 } 382 FX_BOOL CCodec_JpegDecoder::InitDecode() 383 { 384 cinfo.err = &jerr; 385 cinfo.client_data = &m_JmpBuf; 386 if (setjmp(m_JmpBuf) == -1) { 387 return FALSE; 388 } 389 jpeg_create_decompress(&cinfo); 390 m_bInited = TRUE; 391 cinfo.src = &src; 392 src.bytes_in_buffer = m_SrcSize; 393 src.next_input_byte = m_SrcBuf; 394 if (setjmp(m_JmpBuf) == -1) { 395 jpeg_destroy_decompress(&cinfo); 396 m_bInited = FALSE; 397 return FALSE; 398 } 399 cinfo.image_width = m_OrigWidth; 400 cinfo.image_height = m_OrigHeight; 401 int ret = jpeg_read_header(&cinfo, TRUE); 402 if (ret != JPEG_HEADER_OK) { 403 return FALSE; 404 } 405 if (cinfo.saw_Adobe_marker) { 406 m_bJpegTransform = TRUE; 407 } 408 if (cinfo.num_components == 3 && !m_bJpegTransform) { 409 cinfo.out_color_space = cinfo.jpeg_color_space; 410 } 411 m_OrigWidth = cinfo.image_width; 412 m_OrigHeight = cinfo.image_height; 413 m_OutputWidth = m_OrigWidth; 414 m_OutputHeight = m_OutputHeight; 415 m_nDefaultScaleDenom = cinfo.scale_denom; 416 return TRUE; 417 } 418 FX_BOOL CCodec_JpegDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, 419 int nComps, FX_BOOL ColorTransform, IFX_JpegProvider* pJP) 420 { 421 if (pJP) { 422 m_pExtProvider = pJP; 423 m_pExtContext = m_pExtProvider->CreateDecoder(src_buf, src_size, width, height, nComps, ColorTransform); 424 return m_pExtContext != NULL; 425 } 426 _JpegScanSOI(src_buf, src_size); 427 m_SrcBuf = src_buf; 428 m_SrcSize = src_size; 429 jerr.error_exit = _error_fatal; 430 jerr.emit_message = _error_do_nothing1; 431 jerr.output_message = _error_do_nothing; 432 jerr.format_message = _error_do_nothing2; 433 jerr.reset_error_mgr = _error_do_nothing; 434 src.init_source = _src_do_nothing; 435 src.term_source = _src_do_nothing; 436 src.skip_input_data = _src_skip_data; 437 src.fill_input_buffer = _src_fill_buffer; 438 src.resync_to_restart = _src_resync; 439 m_bJpegTransform = ColorTransform; 440 if(src_size > 1 && FXSYS_memcmp32(src_buf + src_size - 2, "\xFF\xD9", 2) != 0) { 441 ((FX_LPBYTE)src_buf)[src_size - 2] = 0xFF; 442 ((FX_LPBYTE)src_buf)[src_size - 1] = 0xD9; 443 } 444 m_OutputWidth = m_OrigWidth = width; 445 m_OutputHeight = m_OrigHeight = height; 446 if (!InitDecode()) { 447 return FALSE; 448 } 449 if (cinfo.num_components < nComps) { 450 return FALSE; 451 } 452 if ((int)cinfo.image_width < width) { 453 return FALSE; 454 } 455 m_Pitch = (cinfo.image_width * cinfo.num_components + 3) / 4 * 4; 456 m_pScanlineBuf = FX_Alloc(FX_BYTE, m_Pitch); 457 if (m_pScanlineBuf == NULL) { 458 return FALSE; 459 } 460 m_nComps = cinfo.num_components; 461 m_bpc = 8; 462 m_bColorTransformed = FALSE; 463 m_bStarted = FALSE; 464 return TRUE; 465 } 466 extern "C" { 467 FX_INT32 FX_GetDownsampleRatio(FX_INT32 originWidth, FX_INT32 originHeight, FX_INT32 downsampleWidth, FX_INT32 downsampleHeight) 468 { 469 int iratio_w = originWidth / downsampleWidth; 470 int iratio_h = originHeight / downsampleHeight; 471 int ratio = (iratio_w > iratio_h) ? iratio_h : iratio_w; 472 if (ratio >= 8) { 473 return 8; 474 } else if (ratio >= 4) { 475 return 4; 476 } else if (ratio >= 2) { 477 return 2; 478 } 479 return 1; 480 } 481 } 482 void CCodec_JpegDecoder::v_DownScale(int dest_width, int dest_height) 483 { 484 if (m_pExtProvider) { 485 m_pExtProvider->DownScale(m_pExtContext, dest_width, dest_height); 486 return; 487 } 488 int old_scale = m_DownScale; 489 m_DownScale = FX_GetDownsampleRatio(m_OrigWidth, m_OrigHeight, dest_width, dest_height); 490 m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale; 491 m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale; 492 m_Pitch = (m_OutputWidth * m_nComps + 3) / 4 * 4; 493 if (old_scale != m_DownScale) { 494 m_NextLine = -1; 495 } 496 } 497 FX_BOOL CCodec_JpegDecoder::v_Rewind() 498 { 499 if (m_pExtProvider) { 500 return m_pExtProvider->Rewind(m_pExtContext); 501 } 502 if (m_bStarted) { 503 jpeg_destroy_decompress(&cinfo); 504 if (!InitDecode()) { 505 return FALSE; 506 } 507 } 508 if (setjmp(m_JmpBuf) == -1) { 509 return FALSE; 510 } 511 cinfo.scale_denom = m_nDefaultScaleDenom * m_DownScale; 512 m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale; 513 m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale; 514 if (!jpeg_start_decompress(&cinfo)) { 515 jpeg_destroy_decompress(&cinfo); 516 return FALSE; 517 } 518 if ((int)cinfo.output_width > m_OrigWidth) { 519 FXSYS_assert(FALSE); 520 return FALSE; 521 } 522 m_bStarted = TRUE; 523 return TRUE; 524 } 525 FX_LPBYTE CCodec_JpegDecoder::v_GetNextLine() 526 { 527 if (m_pExtProvider) { 528 return m_pExtProvider->GetNextLine(m_pExtContext); 529 } 530 int nlines = jpeg_read_scanlines(&cinfo, &m_pScanlineBuf, 1); 531 if (nlines < 1) { 532 return NULL; 533 } 534 return m_pScanlineBuf; 535 } 536 FX_DWORD CCodec_JpegDecoder::GetSrcOffset() 537 { 538 if (m_pExtProvider) { 539 return m_pExtProvider->GetSrcOffset(m_pExtContext); 540 } 541 return (FX_DWORD)(m_SrcSize - src.bytes_in_buffer); 542 } 543 ICodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, 544 int width, int height, int nComps, FX_BOOL ColorTransform) 545 { 546 if (src_buf == NULL || src_size == 0) { 547 return NULL; 548 } 549 CCodec_JpegDecoder* pDecoder = FX_NEW CCodec_JpegDecoder; 550 if (pDecoder == NULL) { 551 return NULL; 552 } 553 if (!pDecoder->Create(src_buf, src_size, width, height, nComps, ColorTransform, m_pExtProvider)) { 554 delete pDecoder; 555 return NULL; 556 } 557 return pDecoder; 558 } 559 FX_BOOL CCodec_JpegModule::LoadInfo(FX_LPCBYTE src_buf, FX_DWORD src_size, int& width, int& height, 560 int& num_components, int& bits_per_components, FX_BOOL& color_transform, 561 FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) 562 { 563 if (m_pExtProvider) { 564 return m_pExtProvider->LoadInfo(src_buf, src_size, width, height, 565 num_components, bits_per_components, color_transform, 566 icc_buf_ptr, icc_length); 567 } 568 return _JpegLoadInfo(src_buf, src_size, width, height, num_components, bits_per_components, color_transform, icc_buf_ptr, icc_length); 569 } 570 FX_BOOL CCodec_JpegModule::Encode(const CFX_DIBSource* pSource, FX_LPBYTE& dest_buf, FX_STRSIZE& dest_size, int quality, FX_LPCBYTE icc_buf, FX_DWORD icc_length) 571 { 572 if (m_pExtProvider) { 573 return m_pExtProvider->Encode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length); 574 } 575 if(pSource->GetBPP() < 8 || pSource->GetPalette() != NULL) { 576 ASSERT(pSource->GetBPP() >= 8 && pSource->GetPalette() == NULL); 577 return FALSE; 578 } 579 _JpegEncode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length); 580 return TRUE; 581 } 582 struct FXJPEG_Context { 583 jmp_buf m_JumpMark; 584 jpeg_decompress_struct m_Info; 585 jpeg_error_mgr m_ErrMgr; 586 jpeg_source_mgr m_SrcMgr; 587 unsigned int m_SkipSize; 588 void* (*m_AllocFunc)(unsigned int); 589 void (*m_FreeFunc)(void*); 590 }; 591 extern "C" { 592 static void _error_fatal1(j_common_ptr cinfo) 593 { 594 longjmp(((FXJPEG_Context*)cinfo->client_data)->m_JumpMark, -1); 595 } 596 }; 597 extern "C" { 598 static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num) 599 { 600 if (cinfo->src->bytes_in_buffer < (size_t)num) { 601 ((FXJPEG_Context*)cinfo->client_data)->m_SkipSize = (unsigned int)(num - cinfo->src->bytes_in_buffer); 602 cinfo->src->bytes_in_buffer = 0; 603 } else { 604 cinfo->src->next_input_byte += num; 605 cinfo->src->bytes_in_buffer -= num; 606 } 607 } 608 }; 609 static void* jpeg_alloc_func(unsigned int size) 610 { 611 return FX_Alloc(char, size); 612 } 613 static void jpeg_free_func(void* p) 614 { 615 FX_Free(p); 616 } 617 void* CCodec_JpegModule::Start() 618 { 619 if (m_pExtProvider) { 620 return m_pExtProvider->Start(); 621 } 622 FXJPEG_Context* p = (FXJPEG_Context*)FX_Alloc(FX_BYTE, sizeof(FXJPEG_Context)); 623 if (p == NULL) { 624 return NULL; 625 } 626 p->m_AllocFunc = jpeg_alloc_func; 627 p->m_FreeFunc = jpeg_free_func; 628 p->m_ErrMgr.error_exit = _error_fatal1; 629 p->m_ErrMgr.emit_message = _error_do_nothing1; 630 p->m_ErrMgr.output_message = _error_do_nothing; 631 p->m_ErrMgr.format_message = _error_do_nothing2; 632 p->m_ErrMgr.reset_error_mgr = _error_do_nothing; 633 p->m_SrcMgr.init_source = _src_do_nothing; 634 p->m_SrcMgr.term_source = _src_do_nothing; 635 p->m_SrcMgr.skip_input_data = _src_skip_data1; 636 p->m_SrcMgr.fill_input_buffer = _src_fill_buffer; 637 p->m_SrcMgr.resync_to_restart = _src_resync; 638 p->m_Info.client_data = p; 639 p->m_Info.err = &p->m_ErrMgr; 640 if (setjmp(p->m_JumpMark) == -1) { 641 return 0; 642 } 643 jpeg_create_decompress(&p->m_Info); 644 p->m_Info.src = &p->m_SrcMgr; 645 p->m_SkipSize = 0; 646 return p; 647 } 648 void CCodec_JpegModule::Finish(void* pContext) 649 { 650 if (m_pExtProvider) { 651 m_pExtProvider->Finish(pContext); 652 return; 653 } 654 FXJPEG_Context* p = (FXJPEG_Context*)pContext; 655 jpeg_destroy_decompress(&p->m_Info); 656 p->m_FreeFunc(p); 657 } 658 void CCodec_JpegModule::Input(void* pContext, const unsigned char* src_buf, FX_DWORD src_size) 659 { 660 if (m_pExtProvider) { 661 m_pExtProvider->Input(pContext, src_buf, src_size); 662 return; 663 } 664 FXJPEG_Context* p = (FXJPEG_Context*)pContext; 665 if (p->m_SkipSize) { 666 if (p->m_SkipSize > src_size) { 667 p->m_SrcMgr.bytes_in_buffer = 0; 668 p->m_SkipSize -= src_size; 669 return; 670 } 671 src_size -= p->m_SkipSize; 672 src_buf += p->m_SkipSize; 673 p->m_SkipSize = 0; 674 } 675 p->m_SrcMgr.next_input_byte = src_buf; 676 p->m_SrcMgr.bytes_in_buffer = src_size; 677 } 678 int CCodec_JpegModule::ReadHeader(void* pContext, int* width, int* height, int* nComps) 679 { 680 if (m_pExtProvider) { 681 return m_pExtProvider->ReadHeader(pContext, width, height, nComps); 682 } 683 FXJPEG_Context* p = (FXJPEG_Context*)pContext; 684 if (setjmp(p->m_JumpMark) == -1) { 685 return 1; 686 } 687 int ret = jpeg_read_header(&p->m_Info, true); 688 if (ret == JPEG_SUSPENDED) { 689 return 2; 690 } 691 if (ret != JPEG_HEADER_OK) { 692 return 1; 693 } 694 *width = p->m_Info.image_width; 695 *height = p->m_Info.image_height; 696 *nComps = p->m_Info.num_components; 697 return 0; 698 } 699 FX_BOOL CCodec_JpegModule::StartScanline(void* pContext, int down_scale) 700 { 701 if (m_pExtProvider) { 702 return m_pExtProvider->StartScanline(pContext, down_scale); 703 } 704 FXJPEG_Context* p = (FXJPEG_Context*)pContext; 705 if (setjmp(p->m_JumpMark) == -1) { 706 return FALSE; 707 } 708 p->m_Info.scale_denom = down_scale; 709 return jpeg_start_decompress(&p->m_Info); 710 } 711 FX_BOOL CCodec_JpegModule::ReadScanline(void* pContext, unsigned char* dest_buf) 712 { 713 if (m_pExtProvider) { 714 return m_pExtProvider->ReadScanline(pContext, dest_buf); 715 } 716 FXJPEG_Context* p = (FXJPEG_Context*)pContext; 717 if (setjmp(p->m_JumpMark) == -1) { 718 return FALSE; 719 } 720 int nlines = jpeg_read_scanlines(&p->m_Info, &dest_buf, 1); 721 return nlines == 1; 722 } 723 FX_DWORD CCodec_JpegModule::GetAvailInput(void* pContext, FX_LPBYTE* avail_buf_ptr) 724 { 725 if (m_pExtProvider) { 726 return m_pExtProvider->GetAvailInput(pContext, avail_buf_ptr); 727 } 728 if(avail_buf_ptr != NULL) { 729 *avail_buf_ptr = NULL; 730 if(((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) { 731 *avail_buf_ptr = (FX_LPBYTE)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte; 732 } 733 } 734 return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer; 735 } 736
