| /* $Id: tif_jbig.c,v 1.15 2010-03-10 18:56:48 bfriesen Exp $ */ |
| |
| /* |
| * Copyright (c) 1988-1997 Sam Leffler |
| * Copyright (c) 1991-1997 Silicon Graphics, Inc. |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and |
| * its documentation for any purpose is hereby granted without fee, provided |
| * that (i) the above copyright notices and this permission notice appear in |
| * all copies of the software and related documentation, and (ii) the names of |
| * Sam Leffler and Silicon Graphics may not be used in any advertising or |
| * publicity relating to the software without the specific, prior written |
| * permission of Sam Leffler and Silicon Graphics. |
| * |
| * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
| * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
| * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
| * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
| * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| * OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * TIFF Library. |
| * |
| * JBIG Compression Algorithm Support. |
| * Contributed by Lee Howard <faxguy@deanox.com> |
| * |
| */ |
| |
| #include "tiffiop.h" |
| |
| #ifdef JBIG_SUPPORT |
| #include "jbig.h" |
| |
| static int JBIGSetupDecode(TIFF* tif) |
| { |
| if (TIFFNumberOfStrips(tif) != 1) |
| { |
| TIFFErrorExt(tif->tif_clientdata, "JBIG", "Multistrip images not supported in decoder"); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int JBIGDecode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s) |
| { |
| struct jbg_dec_state decoder; |
| int decodeStatus = 0; |
| unsigned char* pImage = NULL; |
| (void) size, (void) s; |
| |
| if (isFillOrder(tif, tif->tif_dir.td_fillorder)) |
| { |
| TIFFReverseBits(tif->tif_rawdata, tif->tif_rawdatasize); |
| } |
| |
| jbg_dec_init(&decoder); |
| |
| #if defined(HAVE_JBG_NEWLEN) |
| jbg_newlen(tif->tif_rawdata, (size_t)tif->tif_rawdatasize); |
| /* |
| * I do not check the return status of jbg_newlen because even if this |
| * function fails it does not necessarily mean that decoding the image |
| * will fail. It is generally only needed for received fax images |
| * that do not contain the actual length of the image in the BIE |
| * header. I do not log when an error occurs because that will cause |
| * problems when converting JBIG encoded TIFF's to |
| * PostScript. As long as the actual image length is contained in the |
| * BIE header jbg_dec_in should succeed. |
| */ |
| #endif /* HAVE_JBG_NEWLEN */ |
| |
| decodeStatus = jbg_dec_in(&decoder, (unsigned char*)tif->tif_rawdata, |
| (size_t)tif->tif_rawdatasize, NULL); |
| if (JBG_EOK != decodeStatus) |
| { |
| /* |
| * XXX: JBG_EN constant was defined in pre-2.0 releases of the |
| * JBIG-KIT. Since the 2.0 the error reporting functions were |
| * changed. We will handle both cases here. |
| */ |
| TIFFErrorExt(tif->tif_clientdata, |
| "JBIG", "Error (%d) decoding: %s", |
| decodeStatus, |
| #if defined(JBG_EN) |
| jbg_strerror(decodeStatus, JBG_EN) |
| #else |
| jbg_strerror(decodeStatus) |
| #endif |
| ); |
| return 0; |
| } |
| |
| pImage = jbg_dec_getimage(&decoder, 0); |
| _TIFFmemcpy(buffer, pImage, jbg_dec_getsize(&decoder)); |
| jbg_dec_free(&decoder); |
| return 1; |
| } |
| |
| static int JBIGSetupEncode(TIFF* tif) |
| { |
| if (TIFFNumberOfStrips(tif) != 1) |
| { |
| TIFFErrorExt(tif->tif_clientdata, "JBIG", "Multistrip images not supported in encoder"); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int JBIGCopyEncodedData(TIFF* tif, unsigned char* pp, size_t cc, uint16 s) |
| { |
| (void) s; |
| while (cc > 0) |
| { |
| tmsize_t n = (tmsize_t)cc; |
| |
| if (tif->tif_rawcc + n > tif->tif_rawdatasize) |
| { |
| n = tif->tif_rawdatasize - tif->tif_rawcc; |
| } |
| |
| assert(n > 0); |
| _TIFFmemcpy(tif->tif_rawcp, pp, n); |
| tif->tif_rawcp += n; |
| tif->tif_rawcc += n; |
| pp += n; |
| cc -= (size_t)n; |
| if (tif->tif_rawcc >= tif->tif_rawdatasize && |
| !TIFFFlushData1(tif)) |
| { |
| return (-1); |
| } |
| } |
| |
| return (1); |
| } |
| |
| static void JBIGOutputBie(unsigned char* buffer, size_t len, void* userData) |
| { |
| TIFF* tif = (TIFF*)userData; |
| |
| if (isFillOrder(tif, tif->tif_dir.td_fillorder)) |
| { |
| TIFFReverseBits(buffer, (tmsize_t)len); |
| } |
| |
| JBIGCopyEncodedData(tif, buffer, len, 0); |
| } |
| |
| static int JBIGEncode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s) |
| { |
| TIFFDirectory* dir = &tif->tif_dir; |
| struct jbg_enc_state encoder; |
| |
| (void) size, (void) s; |
| |
| jbg_enc_init(&encoder, |
| dir->td_imagewidth, |
| dir->td_imagelength, |
| 1, |
| &buffer, |
| JBIGOutputBie, |
| tif); |
| /* |
| * jbg_enc_out does the "real" encoding. As data is encoded, |
| * JBIGOutputBie is called, which writes the data to the directory. |
| */ |
| jbg_enc_out(&encoder); |
| jbg_enc_free(&encoder); |
| |
| return 1; |
| } |
| |
| int TIFFInitJBIG(TIFF* tif, int scheme) |
| { |
| assert(scheme == COMPRESSION_JBIG); |
| |
| /* |
| * These flags are set so the JBIG Codec can control when to reverse |
| * bits and when not to and to allow the jbig decoder and bit reverser |
| * to write to memory when necessary. |
| */ |
| tif->tif_flags |= TIFF_NOBITREV; |
| tif->tif_flags &= ~TIFF_MAPPED; |
| |
| /* Setup the function pointers for encode, decode, and cleanup. */ |
| tif->tif_setupdecode = JBIGSetupDecode; |
| tif->tif_decodestrip = JBIGDecode; |
| |
| tif->tif_setupencode = JBIGSetupEncode; |
| tif->tif_encodestrip = JBIGEncode; |
| |
| return 1; |
| } |
| |
| #endif /* JBIG_SUPPORT */ |
| |
| /* vim: set ts=8 sts=8 sw=8 noet: */ |
| |
| /* |
| * Local Variables: |
| * mode: c |
| * c-basic-offset: 8 |
| * fill-column: 78 |
| * End: |
| */ |