From d479dd1aab1c1cb907932c6595b0ef33523fc797 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Fri, 6 Nov 2015 07:14:47 +0100 Subject: Imported Upstream version 1.8.3 --- tiff/libtiff/tif_fax3.c | 1595 ----------------------------------------------- 1 file changed, 1595 deletions(-) delete mode 100755 tiff/libtiff/tif_fax3.c (limited to 'tiff/libtiff/tif_fax3.c') diff --git a/tiff/libtiff/tif_fax3.c b/tiff/libtiff/tif_fax3.c deleted file mode 100755 index 2b2dccd..0000000 --- a/tiff/libtiff/tif_fax3.c +++ /dev/null @@ -1,1595 +0,0 @@ -/* $Id: tif_fax3.c,v 1.74 2012-06-21 02:01:31 fwarmerdam Exp $ */ - -/* - * Copyright (c) 1990-1997 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. - */ - -#include "tiffiop.h" -#ifdef CCITT_SUPPORT -/* - * TIFF Library. - * - * CCITT Group 3 (T.4) and Group 4 (T.6) Compression Support. - * - * This file contains support for decoding and encoding TIFF - * compression algorithms 2, 3, 4, and 32771. - * - * Decoder support is derived, with permission, from the code - * in Frank Cringle's viewfax program; - * Copyright (C) 1990, 1995 Frank D. Cringle. - */ -#include "tif_fax3.h" -#define G3CODES -#include "t4.h" -#include - -/* - * Compression+decompression state blocks are - * derived from this ``base state'' block. - */ -typedef struct { - int rw_mode; /* O_RDONLY for decode, else encode */ - int mode; /* operating mode */ - tmsize_t rowbytes; /* bytes in a decoded scanline */ - uint32 rowpixels; /* pixels in a scanline */ - - uint16 cleanfaxdata; /* CleanFaxData tag */ - uint32 badfaxrun; /* BadFaxRun tag */ - uint32 badfaxlines; /* BadFaxLines tag */ - uint32 groupoptions; /* Group 3/4 options tag */ - - TIFFVGetMethod vgetparent; /* super-class method */ - TIFFVSetMethod vsetparent; /* super-class method */ - TIFFPrintMethod printdir; /* super-class method */ -} Fax3BaseState; -#define Fax3State(tif) ((Fax3BaseState*) (tif)->tif_data) - -typedef enum { G3_1D, G3_2D } Ttag; -typedef struct { - Fax3BaseState b; - - /* Decoder state info */ - const unsigned char* bitmap; /* bit reversal table */ - uint32 data; /* current i/o byte/word */ - int bit; /* current i/o bit in byte */ - int EOLcnt; /* count of EOL codes recognized */ - TIFFFaxFillFunc fill; /* fill routine */ - uint32* runs; /* b&w runs for current/previous row */ - uint32* refruns; /* runs for reference line */ - uint32* curruns; /* runs for current line */ - - /* Encoder state info */ - Ttag tag; /* encoding state */ - unsigned char* refline; /* reference line for 2d decoding */ - int k; /* #rows left that can be 2d encoded */ - int maxk; /* max #rows that can be 2d encoded */ - - int line; -} Fax3CodecState; -#define DecoderState(tif) ((Fax3CodecState*) Fax3State(tif)) -#define EncoderState(tif) ((Fax3CodecState*) Fax3State(tif)) - -#define is2DEncoding(sp) (sp->b.groupoptions & GROUP3OPT_2DENCODING) -#define isAligned(p,t) ((((size_t)(p)) & (sizeof (t)-1)) == 0) - -/* - * Group 3 and Group 4 Decoding. - */ - -/* - * These macros glue the TIFF library state to - * the state expected by Frank's decoder. - */ -#define DECLARE_STATE(tif, sp, mod) \ - static const char module[] = mod; \ - Fax3CodecState* sp = DecoderState(tif); \ - int a0; /* reference element */ \ - int lastx = sp->b.rowpixels; /* last element in row */ \ - uint32 BitAcc; /* bit accumulator */ \ - int BitsAvail; /* # valid bits in BitAcc */ \ - int RunLength; /* length of current run */ \ - unsigned char* cp; /* next byte of input data */ \ - unsigned char* ep; /* end of input data */ \ - uint32* pa; /* place to stuff next run */ \ - uint32* thisrun; /* current row's run array */ \ - int EOLcnt; /* # EOL codes recognized */ \ - const unsigned char* bitmap = sp->bitmap; /* input data bit reverser */ \ - const TIFFFaxTabEnt* TabEnt -#define DECLARE_STATE_2D(tif, sp, mod) \ - DECLARE_STATE(tif, sp, mod); \ - int b1; /* next change on prev line */ \ - uint32* pb /* next run in reference line */\ -/* - * Load any state that may be changed during decoding. - */ -#define CACHE_STATE(tif, sp) do { \ - BitAcc = sp->data; \ - BitsAvail = sp->bit; \ - EOLcnt = sp->EOLcnt; \ - cp = (unsigned char*) tif->tif_rawcp; \ - ep = cp + tif->tif_rawcc; \ -} while (0) -/* - * Save state possibly changed during decoding. - */ -#define UNCACHE_STATE(tif, sp) do { \ - sp->bit = BitsAvail; \ - sp->data = BitAcc; \ - sp->EOLcnt = EOLcnt; \ - tif->tif_rawcc -= (tmsize_t)((uint8*) cp - tif->tif_rawcp); \ - tif->tif_rawcp = (uint8*) cp; \ -} while (0) - -/* - * Setup state for decoding a strip. - */ -static int -Fax3PreDecode(TIFF* tif, uint16 s) -{ - Fax3CodecState* sp = DecoderState(tif); - - (void) s; - assert(sp != NULL); - sp->bit = 0; /* force initial read */ - sp->data = 0; - sp->EOLcnt = 0; /* force initial scan for EOL */ - /* - * Decoder assumes lsb-to-msb bit order. Note that we select - * this here rather than in Fax3SetupState so that viewers can - * hold the image open, fiddle with the FillOrder tag value, - * and then re-decode the image. Otherwise they'd need to close - * and open the image to get the state reset. - */ - sp->bitmap = - TIFFGetBitRevTable(tif->tif_dir.td_fillorder != FILLORDER_LSB2MSB); - if (sp->refruns) { /* init reference line to white */ - sp->refruns[0] = (uint32) sp->b.rowpixels; - sp->refruns[1] = 0; - } - sp->line = 0; - return (1); -} - -/* - * Routine for handling various errors/conditions. - * Note how they are "glued into the decoder" by - * overriding the definitions used by the decoder. - */ - -static void -Fax3Unexpected(const char* module, TIFF* tif, uint32 line, uint32 a0) -{ - TIFFErrorExt(tif->tif_clientdata, module, "Bad code word at line %u of %s %u (x %u)", - line, isTiled(tif) ? "tile" : "strip", - (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), - a0); -} -#define unexpected(table, a0) Fax3Unexpected(module, tif, sp->line, a0) - -static void -Fax3Extension(const char* module, TIFF* tif, uint32 line, uint32 a0) -{ - TIFFErrorExt(tif->tif_clientdata, module, - "Uncompressed data (not supported) at line %u of %s %u (x %u)", - line, isTiled(tif) ? "tile" : "strip", - (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), - a0); -} -#define extension(a0) Fax3Extension(module, tif, sp->line, a0) - -static void -Fax3BadLength(const char* module, TIFF* tif, uint32 line, uint32 a0, uint32 lastx) -{ - TIFFWarningExt(tif->tif_clientdata, module, "%s at line %u of %s %u (got %u, expected %u)", - a0 < lastx ? "Premature EOL" : "Line length mismatch", - line, isTiled(tif) ? "tile" : "strip", - (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), - a0, lastx); -} -#define badlength(a0,lastx) Fax3BadLength(module, tif, sp->line, a0, lastx) - -static void -Fax3PrematureEOF(const char* module, TIFF* tif, uint32 line, uint32 a0) -{ - TIFFWarningExt(tif->tif_clientdata, module, "Premature EOF at line %u of %s %u (x %u)", - line, isTiled(tif) ? "tile" : "strip", - (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), - a0); -} -#define prematureEOF(a0) Fax3PrematureEOF(module, tif, sp->line, a0) - -#define Nop - -/* - * Decode the requested amount of G3 1D-encoded data. - */ -static int -Fax3Decode1D(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) -{ - DECLARE_STATE(tif, sp, "Fax3Decode1D"); - (void) s; - if (occ % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); - return (-1); - } - CACHE_STATE(tif, sp); - thisrun = sp->curruns; - while (occ > 0) { - a0 = 0; - RunLength = 0; - pa = thisrun; -#ifdef FAX3_DEBUG - printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail); - printf("-------------------- %d\n", tif->tif_row); - fflush(stdout); -#endif - SYNC_EOL(EOF1D); - EXPAND1D(EOF1Da); - (*sp->fill)(buf, thisrun, pa, lastx); - buf += sp->b.rowbytes; - occ -= sp->b.rowbytes; - sp->line++; - continue; - EOF1D: /* premature EOF */ - CLEANUP_RUNS(); - EOF1Da: /* premature EOF */ - (*sp->fill)(buf, thisrun, pa, lastx); - UNCACHE_STATE(tif, sp); - return (-1); - } - UNCACHE_STATE(tif, sp); - return (1); -} - -#define SWAP(t,a,b) { t x; x = (a); (a) = (b); (b) = x; } -/* - * Decode the requested amount of G3 2D-encoded data. - */ -static int -Fax3Decode2D(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) -{ - DECLARE_STATE_2D(tif, sp, "Fax3Decode2D"); - int is1D; /* current line is 1d/2d-encoded */ - (void) s; - if (occ % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); - return (-1); - } - CACHE_STATE(tif, sp); - while (occ > 0) { - a0 = 0; - RunLength = 0; - pa = thisrun = sp->curruns; -#ifdef FAX3_DEBUG - printf("\nBitAcc=%08X, BitsAvail = %d EOLcnt = %d", - BitAcc, BitsAvail, EOLcnt); -#endif - SYNC_EOL(EOF2D); - NeedBits8(1, EOF2D); - is1D = GetBits(1); /* 1D/2D-encoding tag bit */ - ClrBits(1); -#ifdef FAX3_DEBUG - printf(" %s\n-------------------- %d\n", - is1D ? "1D" : "2D", tif->tif_row); - fflush(stdout); -#endif - pb = sp->refruns; - b1 = *pb++; - if (is1D) - EXPAND1D(EOF2Da); - else - EXPAND2D(EOF2Da); - (*sp->fill)(buf, thisrun, pa, lastx); - SETVALUE(0); /* imaginary change for reference */ - SWAP(uint32*, sp->curruns, sp->refruns); - buf += sp->b.rowbytes; - occ -= sp->b.rowbytes; - sp->line++; - continue; - EOF2D: /* premature EOF */ - CLEANUP_RUNS(); - EOF2Da: /* premature EOF */ - (*sp->fill)(buf, thisrun, pa, lastx); - UNCACHE_STATE(tif, sp); - return (-1); - } - UNCACHE_STATE(tif, sp); - return (1); -} -#undef SWAP - -/* - * The ZERO & FILL macros must handle spans < 2*sizeof(long) bytes. - * For machines with 64-bit longs this is <16 bytes; otherwise - * this is <8 bytes. We optimize the code here to reflect the - * machine characteristics. - */ -#if SIZEOF_UNSIGNED_LONG == 8 -# define FILL(n, cp) \ - switch (n) { \ - case 15:(cp)[14] = 0xff; case 14:(cp)[13] = 0xff; case 13: (cp)[12] = 0xff;\ - case 12:(cp)[11] = 0xff; case 11:(cp)[10] = 0xff; case 10: (cp)[9] = 0xff;\ - case 9: (cp)[8] = 0xff; case 8: (cp)[7] = 0xff; case 7: (cp)[6] = 0xff;\ - case 6: (cp)[5] = 0xff; case 5: (cp)[4] = 0xff; case 4: (cp)[3] = 0xff;\ - case 3: (cp)[2] = 0xff; case 2: (cp)[1] = 0xff; \ - case 1: (cp)[0] = 0xff; (cp) += (n); case 0: ; \ - } -# define ZERO(n, cp) \ - switch (n) { \ - case 15:(cp)[14] = 0; case 14:(cp)[13] = 0; case 13: (cp)[12] = 0; \ - case 12:(cp)[11] = 0; case 11:(cp)[10] = 0; case 10: (cp)[9] = 0; \ - case 9: (cp)[8] = 0; case 8: (cp)[7] = 0; case 7: (cp)[6] = 0; \ - case 6: (cp)[5] = 0; case 5: (cp)[4] = 0; case 4: (cp)[3] = 0; \ - case 3: (cp)[2] = 0; case 2: (cp)[1] = 0; \ - case 1: (cp)[0] = 0; (cp) += (n); case 0: ; \ - } -#else -# define FILL(n, cp) \ - switch (n) { \ - case 7: (cp)[6] = 0xff; case 6: (cp)[5] = 0xff; case 5: (cp)[4] = 0xff; \ - case 4: (cp)[3] = 0xff; case 3: (cp)[2] = 0xff; case 2: (cp)[1] = 0xff; \ - case 1: (cp)[0] = 0xff; (cp) += (n); case 0: ; \ - } -# define ZERO(n, cp) \ - switch (n) { \ - case 7: (cp)[6] = 0; case 6: (cp)[5] = 0; case 5: (cp)[4] = 0; \ - case 4: (cp)[3] = 0; case 3: (cp)[2] = 0; case 2: (cp)[1] = 0; \ - case 1: (cp)[0] = 0; (cp) += (n); case 0: ; \ - } -#endif - -/* - * Bit-fill a row according to the white/black - * runs generated during G3/G4 decoding. - */ -void -_TIFFFax3fillruns(unsigned char* buf, uint32* runs, uint32* erun, uint32 lastx) -{ - static const unsigned char _fillmasks[] = - { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; - unsigned char* cp; - uint32 x, bx, run; - int32 n, nw; - long* lp; - - if ((erun-runs)&1) - *erun++ = 0; - x = 0; - for (; runs < erun; runs += 2) { - run = runs[0]; - if (x+run > lastx || run > lastx ) - run = runs[0] = (uint32) (lastx - x); - if (run) { - cp = buf + (x>>3); - bx = x&7; - if (run > 8-bx) { - if (bx) { /* align to byte boundary */ - *cp++ &= 0xff << (8-bx); - run -= 8-bx; - } - if( (n = run >> 3) != 0 ) { /* multiple bytes to fill */ - if ((n/sizeof (long)) > 1) { - /* - * Align to longword boundary and fill. - */ - for (; n && !isAligned(cp, long); n--) - *cp++ = 0x00; - lp = (long*) cp; - nw = (int32)(n / sizeof (long)); - n -= nw * sizeof (long); - do { - *lp++ = 0L; - } while (--nw); - cp = (unsigned char*) lp; - } - ZERO(n, cp); - run &= 7; - } - if (run) - cp[0] &= 0xff >> run; - } else - cp[0] &= ~(_fillmasks[run]>>bx); - x += runs[0]; - } - run = runs[1]; - if (x+run > lastx || run > lastx ) - run = runs[1] = lastx - x; - if (run) { - cp = buf + (x>>3); - bx = x&7; - if (run > 8-bx) { - if (bx) { /* align to byte boundary */ - *cp++ |= 0xff >> bx; - run -= 8-bx; - } - if( (n = run>>3) != 0 ) { /* multiple bytes to fill */ - if ((n/sizeof (long)) > 1) { - /* - * Align to longword boundary and fill. - */ - for (; n && !isAligned(cp, long); n--) - *cp++ = 0xff; - lp = (long*) cp; - nw = (int32)(n / sizeof (long)); - n -= nw * sizeof (long); - do { - *lp++ = -1L; - } while (--nw); - cp = (unsigned char*) lp; - } - FILL(n, cp); - run &= 7; - } - if (run) - cp[0] |= 0xff00 >> run; - } else - cp[0] |= _fillmasks[run]>>bx; - x += runs[1]; - } - } - assert(x == lastx); -} -#undef ZERO -#undef FILL - -static int -Fax3FixupTags(TIFF* tif) -{ - (void) tif; - return (1); -} - -/* - * Setup G3/G4-related compression/decompression state - * before data is processed. This routine is called once - * per image -- it sets up different state based on whether - * or not decoding or encoding is being done and whether - * 1D- or 2D-encoded data is involved. - */ -static int -Fax3SetupState(TIFF* tif) -{ - static const char module[] = "Fax3SetupState"; - TIFFDirectory* td = &tif->tif_dir; - Fax3BaseState* sp = Fax3State(tif); - int needsRefLine; - Fax3CodecState* dsp = (Fax3CodecState*) Fax3State(tif); - tmsize_t rowbytes; - uint32 rowpixels, nruns; - - if (td->td_bitspersample != 1) { - TIFFErrorExt(tif->tif_clientdata, module, - "Bits/sample must be 1 for Group 3/4 encoding/decoding"); - return (0); - } - /* - * Calculate the scanline/tile widths. - */ - if (isTiled(tif)) { - rowbytes = TIFFTileRowSize(tif); - rowpixels = td->td_tilewidth; - } else { - rowbytes = TIFFScanlineSize(tif); - rowpixels = td->td_imagewidth; - } - sp->rowbytes = rowbytes; - sp->rowpixels = rowpixels; - /* - * Allocate any additional space required for decoding/encoding. - */ - needsRefLine = ( - (sp->groupoptions & GROUP3OPT_2DENCODING) || - td->td_compression == COMPRESSION_CCITTFAX4 - ); - - /* - Assure that allocation computations do not overflow. - - TIFFroundup and TIFFSafeMultiply return zero on integer overflow - */ - dsp->runs=(uint32*) NULL; - nruns = TIFFroundup_32(rowpixels,32); - if (needsRefLine) { - nruns = TIFFSafeMultiply(uint32,nruns,2); - } - if ((nruns == 0) || (TIFFSafeMultiply(uint32,nruns,2) == 0)) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "Row pixels integer overflow (rowpixels %u)", - rowpixels); - return (0); - } - dsp->runs = (uint32*) _TIFFCheckMalloc(tif, - TIFFSafeMultiply(uint32,nruns,2), - sizeof (uint32), - "for Group 3/4 run arrays"); - if (dsp->runs == NULL) - return (0); - memset( dsp->runs, 0, TIFFSafeMultiply(uint32,nruns,2)*sizeof(uint32)); - dsp->curruns = dsp->runs; - if (needsRefLine) - dsp->refruns = dsp->runs + nruns; - else - dsp->refruns = NULL; - if (td->td_compression == COMPRESSION_CCITTFAX3 - && is2DEncoding(dsp)) { /* NB: default is 1D routine */ - tif->tif_decoderow = Fax3Decode2D; - tif->tif_decodestrip = Fax3Decode2D; - tif->tif_decodetile = Fax3Decode2D; - } - - if (needsRefLine) { /* 2d encoding */ - Fax3CodecState* esp = EncoderState(tif); - /* - * 2d encoding requires a scanline - * buffer for the ``reference line''; the - * scanline against which delta encoding - * is referenced. The reference line must - * be initialized to be ``white'' (done elsewhere). - */ - esp->refline = (unsigned char*) _TIFFmalloc(rowbytes); - if (esp->refline == NULL) { - TIFFErrorExt(tif->tif_clientdata, module, - "No space for Group 3/4 reference line"); - return (0); - } - } else /* 1d encoding */ - EncoderState(tif)->refline = NULL; - - return (1); -} - -/* - * CCITT Group 3 FAX Encoding. - */ - -#define Fax3FlushBits(tif, sp) { \ - if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \ - (void) TIFFFlushData1(tif); \ - *(tif)->tif_rawcp++ = (uint8) (sp)->data; \ - (tif)->tif_rawcc++; \ - (sp)->data = 0, (sp)->bit = 8; \ -} -#define _FlushBits(tif) { \ - if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \ - (void) TIFFFlushData1(tif); \ - *(tif)->tif_rawcp++ = (uint8) data; \ - (tif)->tif_rawcc++; \ - data = 0, bit = 8; \ -} -static const int _msbmask[9] = - { 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff }; -#define _PutBits(tif, bits, length) { \ - while (length > bit) { \ - data |= bits >> (length - bit); \ - length -= bit; \ - _FlushBits(tif); \ - } \ - assert( length < 9 ); \ - data |= (bits & _msbmask[length]) << (bit - length); \ - bit -= length; \ - if (bit == 0) \ - _FlushBits(tif); \ -} - -/* - * Write a variable-length bit-value to - * the output stream. Values are - * assumed to be at most 16 bits. - */ -static void -Fax3PutBits(TIFF* tif, unsigned int bits, unsigned int length) -{ - Fax3CodecState* sp = EncoderState(tif); - unsigned int bit = sp->bit; - int data = sp->data; - - _PutBits(tif, bits, length); - - sp->data = data; - sp->bit = bit; -} - -/* - * Write a code to the output stream. - */ -#define putcode(tif, te) Fax3PutBits(tif, (te)->code, (te)->length) - -#ifdef FAX3_DEBUG -#define DEBUG_COLOR(w) (tab == TIFFFaxWhiteCodes ? w "W" : w "B") -#define DEBUG_PRINT(what,len) { \ - int t; \ - printf("%08X/%-2d: %s%5d\t", data, bit, DEBUG_COLOR(what), len); \ - for (t = length-1; t >= 0; t--) \ - putchar(code & (1<bit; - int data = sp->data; - unsigned int code, length; - - while (span >= 2624) { - const tableentry* te = &tab[63 + (2560>>6)]; - code = te->code, length = te->length; -#ifdef FAX3_DEBUG - DEBUG_PRINT("MakeUp", te->runlen); -#endif - _PutBits(tif, code, length); - span -= te->runlen; - } - if (span >= 64) { - const tableentry* te = &tab[63 + (span>>6)]; - assert(te->runlen == 64*(span>>6)); - code = te->code, length = te->length; -#ifdef FAX3_DEBUG - DEBUG_PRINT("MakeUp", te->runlen); -#endif - _PutBits(tif, code, length); - span -= te->runlen; - } - code = tab[span].code, length = tab[span].length; -#ifdef FAX3_DEBUG - DEBUG_PRINT(" Term", tab[span].runlen); -#endif - _PutBits(tif, code, length); - - sp->data = data; - sp->bit = bit; -} - -/* - * Write an EOL code to the output stream. The zero-fill - * logic for byte-aligning encoded scanlines is handled - * here. We also handle writing the tag bit for the next - * scanline when doing 2d encoding. - */ -static void -Fax3PutEOL(TIFF* tif) -{ - Fax3CodecState* sp = EncoderState(tif); - unsigned int bit = sp->bit; - int data = sp->data; - unsigned int code, length, tparm; - - if (sp->b.groupoptions & GROUP3OPT_FILLBITS) { - /* - * Force bit alignment so EOL will terminate on - * a byte boundary. That is, force the bit alignment - * to 16-12 = 4 before putting out the EOL code. - */ - int align = 8 - 4; - if (align != sp->bit) { - if (align > sp->bit) - align = sp->bit + (8 - align); - else - align = sp->bit - align; - code = 0; - tparm=align; - _PutBits(tif, 0, tparm); - } - } - code = EOL, length = 12; - if (is2DEncoding(sp)) - code = (code<<1) | (sp->tag == G3_1D), length++; - _PutBits(tif, code, length); - - sp->data = data; - sp->bit = bit; -} - -/* - * Reset encoding state at the start of a strip. - */ -static int -Fax3PreEncode(TIFF* tif, uint16 s) -{ - Fax3CodecState* sp = EncoderState(tif); - - (void) s; - assert(sp != NULL); - sp->bit = 8; - sp->data = 0; - sp->tag = G3_1D; - /* - * This is necessary for Group 4; otherwise it isn't - * needed because the first scanline of each strip ends - * up being copied into the refline. - */ - if (sp->refline) - _TIFFmemset(sp->refline, 0x00, sp->b.rowbytes); - if (is2DEncoding(sp)) { - float res = tif->tif_dir.td_yresolution; - /* - * The CCITT spec says that when doing 2d encoding, you - * should only do it on K consecutive scanlines, where K - * depends on the resolution of the image being encoded - * (2 for <= 200 lpi, 4 for > 200 lpi). Since the directory - * code initializes td_yresolution to 0, this code will - * select a K of 2 unless the YResolution tag is set - * appropriately. (Note also that we fudge a little here - * and use 150 lpi to avoid problems with units conversion.) - */ - if (tif->tif_dir.td_resolutionunit == RESUNIT_CENTIMETER) - res *= 2.54f; /* convert to inches */ - sp->maxk = (res > 150 ? 4 : 2); - sp->k = sp->maxk-1; - } else - sp->k = sp->maxk = 0; - sp->line = 0; - return (1); -} - -static const unsigned char zeroruns[256] = { - 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, /* 0x00 - 0x0f */ - 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x10 - 0x1f */ - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x20 - 0x2f */ - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x30 - 0x3f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40 - 0x4f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x50 - 0x5f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60 - 0x6f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x70 - 0x7f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 - 0x8f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 - 0x9f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 - 0xaf */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 - 0xbf */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 - 0xcf */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 - 0xdf */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 - 0xef */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xf0 - 0xff */ -}; -static const unsigned char oneruns[256] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 - 0x0f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 - 0x1f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 - 0x2f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 - 0x3f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 - 0x4f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 - 0x5f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 - 0x6f */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 - 0x7f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x80 - 0x8f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x90 - 0x9f */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xa0 - 0xaf */ - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xb0 - 0xbf */ - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xc0 - 0xcf */ - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xd0 - 0xdf */ - 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xe0 - 0xef */ - 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8, /* 0xf0 - 0xff */ -}; - -/* - * On certain systems it pays to inline - * the routines that find pixel spans. - */ -#ifdef VAXC -static int32 find0span(unsigned char*, int32, int32); -static int32 find1span(unsigned char*, int32, int32); -#pragma inline(find0span,find1span) -#endif - -/* - * Find a span of ones or zeros using the supplied - * table. The ``base'' of the bit string is supplied - * along with the start+end bit indices. - */ -inline static int32 -find0span(unsigned char* bp, int32 bs, int32 be) -{ - int32 bits = be - bs; - int32 n, span; - - bp += bs>>3; - /* - * Check partial byte on lhs. - */ - if (bits > 0 && (n = (bs & 7))) { - span = zeroruns[(*bp << n) & 0xff]; - if (span > 8-n) /* table value too generous */ - span = 8-n; - if (span > bits) /* constrain span to bit range */ - span = bits; - if (n+span < 8) /* doesn't extend to edge of byte */ - return (span); - bits -= span; - bp++; - } else - span = 0; - if (bits >= (int32)(2 * 8 * sizeof(long))) { - long* lp; - /* - * Align to longword boundary and check longwords. - */ - while (!isAligned(bp, long)) { - if (*bp != 0x00) - return (span + zeroruns[*bp]); - span += 8, bits -= 8; - bp++; - } - lp = (long*) bp; - while ((bits >= (int32)(8 * sizeof(long))) && (0 == *lp)) { - span += 8*sizeof (long), bits -= 8*sizeof (long); - lp++; - } - bp = (unsigned char*) lp; - } - /* - * Scan full bytes for all 0's. - */ - while (bits >= 8) { - if (*bp != 0x00) /* end of run */ - return (span + zeroruns[*bp]); - span += 8, bits -= 8; - bp++; - } - /* - * Check partial byte on rhs. - */ - if (bits > 0) { - n = zeroruns[*bp]; - span += (n > bits ? bits : n); - } - return (span); -} - -inline static int32 -find1span(unsigned char* bp, int32 bs, int32 be) -{ - int32 bits = be - bs; - int32 n, span; - - bp += bs>>3; - /* - * Check partial byte on lhs. - */ - if (bits > 0 && (n = (bs & 7))) { - span = oneruns[(*bp << n) & 0xff]; - if (span > 8-n) /* table value too generous */ - span = 8-n; - if (span > bits) /* constrain span to bit range */ - span = bits; - if (n+span < 8) /* doesn't extend to edge of byte */ - return (span); - bits -= span; - bp++; - } else - span = 0; - if (bits >= (int32)(2 * 8 * sizeof(long))) { - long* lp; - /* - * Align to longword boundary and check longwords. - */ - while (!isAligned(bp, long)) { - if (*bp != 0xff) - return (span + oneruns[*bp]); - span += 8, bits -= 8; - bp++; - } - lp = (long*) bp; - while ((bits >= (int32)(8 * sizeof(long))) && (~0 == *lp)) { - span += 8*sizeof (long), bits -= 8*sizeof (long); - lp++; - } - bp = (unsigned char*) lp; - } - /* - * Scan full bytes for all 1's. - */ - while (bits >= 8) { - if (*bp != 0xff) /* end of run */ - return (span + oneruns[*bp]); - span += 8, bits -= 8; - bp++; - } - /* - * Check partial byte on rhs. - */ - if (bits > 0) { - n = oneruns[*bp]; - span += (n > bits ? bits : n); - } - return (span); -} - -/* - * Return the offset of the next bit in the range - * [bs..be] that is different from the specified - * color. The end, be, is returned if no such bit - * exists. - */ -#define finddiff(_cp, _bs, _be, _color) \ - (_bs + (_color ? find1span(_cp,_bs,_be) : find0span(_cp,_bs,_be))) -/* - * Like finddiff, but also check the starting bit - * against the end in case start > end. - */ -#define finddiff2(_cp, _bs, _be, _color) \ - (_bs < _be ? finddiff(_cp,_bs,_be,_color) : _be) - -/* - * 1d-encode a row of pixels. The encoding is - * a sequence of all-white or all-black spans - * of pixels encoded with Huffman codes. - */ -static int -Fax3Encode1DRow(TIFF* tif, unsigned char* bp, uint32 bits) -{ - Fax3CodecState* sp = EncoderState(tif); - int32 span; - uint32 bs = 0; - - for (;;) { - span = find0span(bp, bs, bits); /* white span */ - putspan(tif, span, TIFFFaxWhiteCodes); - bs += span; - if (bs >= bits) - break; - span = find1span(bp, bs, bits); /* black span */ - putspan(tif, span, TIFFFaxBlackCodes); - bs += span; - if (bs >= bits) - break; - } - if (sp->b.mode & (FAXMODE_BYTEALIGN|FAXMODE_WORDALIGN)) { - if (sp->bit != 8) /* byte-align */ - Fax3FlushBits(tif, sp); - if ((sp->b.mode&FAXMODE_WORDALIGN) && - !isAligned(tif->tif_rawcp, uint16)) - Fax3FlushBits(tif, sp); - } - return (1); -} - -static const tableentry horizcode = - { 3, 0x1, 0 }; /* 001 */ -static const tableentry passcode = - { 4, 0x1, 0 }; /* 0001 */ -static const tableentry vcodes[7] = { - { 7, 0x03, 0 }, /* 0000 011 */ - { 6, 0x03, 0 }, /* 0000 11 */ - { 3, 0x03, 0 }, /* 011 */ - { 1, 0x1, 0 }, /* 1 */ - { 3, 0x2, 0 }, /* 010 */ - { 6, 0x02, 0 }, /* 0000 10 */ - { 7, 0x02, 0 } /* 0000 010 */ -}; - -/* - * 2d-encode a row of pixels. Consult the CCITT - * documentation for the algorithm. - */ -static int -Fax3Encode2DRow(TIFF* tif, unsigned char* bp, unsigned char* rp, uint32 bits) -{ -#define PIXEL(buf,ix) ((((buf)[(ix)>>3]) >> (7-((ix)&7))) & 1) - uint32 a0 = 0; - uint32 a1 = (PIXEL(bp, 0) != 0 ? 0 : finddiff(bp, 0, bits, 0)); - uint32 b1 = (PIXEL(rp, 0) != 0 ? 0 : finddiff(rp, 0, bits, 0)); - uint32 a2, b2; - - for (;;) { - b2 = finddiff2(rp, b1, bits, PIXEL(rp,b1)); - if (b2 >= a1) { - int32 d = b1 - a1; - if (!(-3 <= d && d <= 3)) { /* horizontal mode */ - a2 = finddiff2(bp, a1, bits, PIXEL(bp,a1)); - putcode(tif, &horizcode); - if (a0+a1 == 0 || PIXEL(bp, a0) == 0) { - putspan(tif, a1-a0, TIFFFaxWhiteCodes); - putspan(tif, a2-a1, TIFFFaxBlackCodes); - } else { - putspan(tif, a1-a0, TIFFFaxBlackCodes); - putspan(tif, a2-a1, TIFFFaxWhiteCodes); - } - a0 = a2; - } else { /* vertical mode */ - putcode(tif, &vcodes[d+3]); - a0 = a1; - } - } else { /* pass mode */ - putcode(tif, &passcode); - a0 = b2; - } - if (a0 >= bits) - break; - a1 = finddiff(bp, a0, bits, PIXEL(bp,a0)); - b1 = finddiff(rp, a0, bits, !PIXEL(bp,a0)); - b1 = finddiff(rp, b1, bits, PIXEL(bp,a0)); - } - return (1); -#undef PIXEL -} - -/* - * Encode a buffer of pixels. - */ -static int -Fax3Encode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) -{ - static const char module[] = "Fax3Encode"; - Fax3CodecState* sp = EncoderState(tif); - (void) s; - if (cc % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be written"); - return (0); - } - while (cc > 0) { - if ((sp->b.mode & FAXMODE_NOEOL) == 0) - Fax3PutEOL(tif); - if (is2DEncoding(sp)) { - if (sp->tag == G3_1D) { - if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels)) - return (0); - sp->tag = G3_2D; - } else { - if (!Fax3Encode2DRow(tif, bp, sp->refline, - sp->b.rowpixels)) - return (0); - sp->k--; - } - if (sp->k == 0) { - sp->tag = G3_1D; - sp->k = sp->maxk-1; - } else - _TIFFmemcpy(sp->refline, bp, sp->b.rowbytes); - } else { - if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels)) - return (0); - } - bp += sp->b.rowbytes; - cc -= sp->b.rowbytes; - } - return (1); -} - -static int -Fax3PostEncode(TIFF* tif) -{ - Fax3CodecState* sp = EncoderState(tif); - - if (sp->bit != 8) - Fax3FlushBits(tif, sp); - return (1); -} - -static void -Fax3Close(TIFF* tif) -{ - if ((Fax3State(tif)->mode & FAXMODE_NORTC) == 0) { - Fax3CodecState* sp = EncoderState(tif); - unsigned int code = EOL; - unsigned int length = 12; - int i; - - if (is2DEncoding(sp)) - code = (code<<1) | (sp->tag == G3_1D), length++; - for (i = 0; i < 6; i++) - Fax3PutBits(tif, code, length); - Fax3FlushBits(tif, sp); - } -} - -static void -Fax3Cleanup(TIFF* tif) -{ - Fax3CodecState* sp = DecoderState(tif); - - assert(sp != 0); - - tif->tif_tagmethods.vgetfield = sp->b.vgetparent; - tif->tif_tagmethods.vsetfield = sp->b.vsetparent; - tif->tif_tagmethods.printdir = sp->b.printdir; - - if (sp->runs) - _TIFFfree(sp->runs); - if (sp->refline) - _TIFFfree(sp->refline); - - _TIFFfree(tif->tif_data); - tif->tif_data = NULL; - - _TIFFSetDefaultCompressionState(tif); -} - -#define FIELD_BADFAXLINES (FIELD_CODEC+0) -#define FIELD_CLEANFAXDATA (FIELD_CODEC+1) -#define FIELD_BADFAXRUN (FIELD_CODEC+2) - -#define FIELD_OPTIONS (FIELD_CODEC+7) - -static const TIFFField faxFields[] = { - { TIFFTAG_FAXMODE, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "FaxMode", NULL }, - { TIFFTAG_FAXFILLFUNC, 0, 0, TIFF_ANY, 0, TIFF_SETGET_OTHER, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "FaxFillFunc", NULL }, - { TIFFTAG_BADFAXLINES, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_BADFAXLINES, TRUE, FALSE, "BadFaxLines", NULL }, - { TIFFTAG_CLEANFAXDATA, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UINT16, FIELD_CLEANFAXDATA, TRUE, FALSE, "CleanFaxData", NULL }, - { TIFFTAG_CONSECUTIVEBADFAXLINES, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_BADFAXRUN, TRUE, FALSE, "ConsecutiveBadFaxLines", NULL }}; -static const TIFFField fax3Fields[] = { - { TIFFTAG_GROUP3OPTIONS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_OPTIONS, FALSE, FALSE, "Group3Options", NULL }, -}; -static const TIFFField fax4Fields[] = { - { TIFFTAG_GROUP4OPTIONS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_OPTIONS, FALSE, FALSE, "Group4Options", NULL }, -}; - -static int -Fax3VSetField(TIFF* tif, uint32 tag, va_list ap) -{ - Fax3BaseState* sp = Fax3State(tif); - const TIFFField* fip; - - assert(sp != 0); - assert(sp->vsetparent != 0); - - switch (tag) { - case TIFFTAG_FAXMODE: - sp->mode = (int) va_arg(ap, int); - return 1; /* NB: pseudo tag */ - case TIFFTAG_FAXFILLFUNC: - DecoderState(tif)->fill = va_arg(ap, TIFFFaxFillFunc); - return 1; /* NB: pseudo tag */ - case TIFFTAG_GROUP3OPTIONS: - /* XXX: avoid reading options if compression mismatches. */ - if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX3) - sp->groupoptions = (uint32) va_arg(ap, uint32); - break; - case TIFFTAG_GROUP4OPTIONS: - /* XXX: avoid reading options if compression mismatches. */ - if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) - sp->groupoptions = (uint32) va_arg(ap, uint32); - break; - case TIFFTAG_BADFAXLINES: - sp->badfaxlines = (uint32) va_arg(ap, uint32); - break; - case TIFFTAG_CLEANFAXDATA: - sp->cleanfaxdata = (uint16) va_arg(ap, uint16_vap); - break; - case TIFFTAG_CONSECUTIVEBADFAXLINES: - sp->badfaxrun = (uint32) va_arg(ap, uint32); - break; - default: - return (*sp->vsetparent)(tif, tag, ap); - } - - if ((fip = TIFFFieldWithTag(tif, tag))) - TIFFSetFieldBit(tif, fip->field_bit); - else - return 0; - - tif->tif_flags |= TIFF_DIRTYDIRECT; - return 1; -} - -static int -Fax3VGetField(TIFF* tif, uint32 tag, va_list ap) -{ - Fax3BaseState* sp = Fax3State(tif); - - assert(sp != 0); - - switch (tag) { - case TIFFTAG_FAXMODE: - *va_arg(ap, int*) = sp->mode; - break; - case TIFFTAG_FAXFILLFUNC: - *va_arg(ap, TIFFFaxFillFunc*) = DecoderState(tif)->fill; - break; - case TIFFTAG_GROUP3OPTIONS: - case TIFFTAG_GROUP4OPTIONS: - *va_arg(ap, uint32*) = sp->groupoptions; - break; - case TIFFTAG_BADFAXLINES: - *va_arg(ap, uint32*) = sp->badfaxlines; - break; - case TIFFTAG_CLEANFAXDATA: - *va_arg(ap, uint16*) = sp->cleanfaxdata; - break; - case TIFFTAG_CONSECUTIVEBADFAXLINES: - *va_arg(ap, uint32*) = sp->badfaxrun; - break; - default: - return (*sp->vgetparent)(tif, tag, ap); - } - return (1); -} - -static void -Fax3PrintDir(TIFF* tif, FILE* fd, long flags) -{ - Fax3BaseState* sp = Fax3State(tif); - - assert(sp != 0); - - (void) flags; - if (TIFFFieldSet(tif,FIELD_OPTIONS)) { - const char* sep = " "; - if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) { - fprintf(fd, " Group 4 Options:"); - if (sp->groupoptions & GROUP4OPT_UNCOMPRESSED) - fprintf(fd, "%suncompressed data", sep); - } else { - - fprintf(fd, " Group 3 Options:"); - if (sp->groupoptions & GROUP3OPT_2DENCODING) - fprintf(fd, "%s2-d encoding", sep), sep = "+"; - if (sp->groupoptions & GROUP3OPT_FILLBITS) - fprintf(fd, "%sEOL padding", sep), sep = "+"; - if (sp->groupoptions & GROUP3OPT_UNCOMPRESSED) - fprintf(fd, "%suncompressed data", sep); - } - fprintf(fd, " (%lu = 0x%lx)\n", - (unsigned long) sp->groupoptions, - (unsigned long) sp->groupoptions); - } - if (TIFFFieldSet(tif,FIELD_CLEANFAXDATA)) { - fprintf(fd, " Fax Data:"); - switch (sp->cleanfaxdata) { - case CLEANFAXDATA_CLEAN: - fprintf(fd, " clean"); - break; - case CLEANFAXDATA_REGENERATED: - fprintf(fd, " receiver regenerated"); - break; - case CLEANFAXDATA_UNCLEAN: - fprintf(fd, " uncorrected errors"); - break; - } - fprintf(fd, " (%u = 0x%x)\n", - sp->cleanfaxdata, sp->cleanfaxdata); - } - if (TIFFFieldSet(tif,FIELD_BADFAXLINES)) - fprintf(fd, " Bad Fax Lines: %lu\n", - (unsigned long) sp->badfaxlines); - if (TIFFFieldSet(tif,FIELD_BADFAXRUN)) - fprintf(fd, " Consecutive Bad Fax Lines: %lu\n", - (unsigned long) sp->badfaxrun); - if (sp->printdir) - (*sp->printdir)(tif, fd, flags); -} - -static int -InitCCITTFax3(TIFF* tif) -{ - static const char module[] = "InitCCITTFax3"; - Fax3BaseState* sp; - - /* - * Merge codec-specific tag information. - */ - if (!_TIFFMergeFields(tif, faxFields, TIFFArrayCount(faxFields))) { - TIFFErrorExt(tif->tif_clientdata, "InitCCITTFax3", - "Merging common CCITT Fax codec-specific tags failed"); - return 0; - } - - /* - * Allocate state block so tag methods have storage to record values. - */ - tif->tif_data = (uint8*) - _TIFFmalloc(sizeof (Fax3CodecState)); - - if (tif->tif_data == NULL) { - TIFFErrorExt(tif->tif_clientdata, module, - "No space for state block"); - return (0); - } - - sp = Fax3State(tif); - sp->rw_mode = tif->tif_mode; - - /* - * Override parent get/set field methods. - */ - sp->vgetparent = tif->tif_tagmethods.vgetfield; - tif->tif_tagmethods.vgetfield = Fax3VGetField; /* hook for codec tags */ - sp->vsetparent = tif->tif_tagmethods.vsetfield; - tif->tif_tagmethods.vsetfield = Fax3VSetField; /* hook for codec tags */ - sp->printdir = tif->tif_tagmethods.printdir; - tif->tif_tagmethods.printdir = Fax3PrintDir; /* hook for codec tags */ - sp->groupoptions = 0; - - if (sp->rw_mode == O_RDONLY) /* FIXME: improve for in place update */ - tif->tif_flags |= TIFF_NOBITREV; /* decoder does bit reversal */ - DecoderState(tif)->runs = NULL; - TIFFSetField(tif, TIFFTAG_FAXFILLFUNC, _TIFFFax3fillruns); - EncoderState(tif)->refline = NULL; - - /* - * Install codec methods. - */ - tif->tif_fixuptags = Fax3FixupTags; - tif->tif_setupdecode = Fax3SetupState; - tif->tif_predecode = Fax3PreDecode; - tif->tif_decoderow = Fax3Decode1D; - tif->tif_decodestrip = Fax3Decode1D; - tif->tif_decodetile = Fax3Decode1D; - tif->tif_setupencode = Fax3SetupState; - tif->tif_preencode = Fax3PreEncode; - tif->tif_postencode = Fax3PostEncode; - tif->tif_encoderow = Fax3Encode; - tif->tif_encodestrip = Fax3Encode; - tif->tif_encodetile = Fax3Encode; - tif->tif_close = Fax3Close; - tif->tif_cleanup = Fax3Cleanup; - - return (1); -} - -int -TIFFInitCCITTFax3(TIFF* tif, int scheme) -{ - (void) scheme; - if (InitCCITTFax3(tif)) { - /* - * Merge codec-specific tag information. - */ - if (!_TIFFMergeFields(tif, fax3Fields, - TIFFArrayCount(fax3Fields))) { - TIFFErrorExt(tif->tif_clientdata, "TIFFInitCCITTFax3", - "Merging CCITT Fax 3 codec-specific tags failed"); - return 0; - } - - /* - * The default format is Class/F-style w/o RTC. - */ - return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_CLASSF); - } else - return 01; -} - -/* - * CCITT Group 4 (T.6) Facsimile-compatible - * Compression Scheme Support. - */ - -#define SWAP(t,a,b) { t x; x = (a); (a) = (b); (b) = x; } -/* - * Decode the requested amount of G4-encoded data. - */ -static int -Fax4Decode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) -{ - DECLARE_STATE_2D(tif, sp, "Fax4Decode"); - (void) s; - if (occ % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); - return (-1); - } - CACHE_STATE(tif, sp); - while (occ > 0) { - a0 = 0; - RunLength = 0; - pa = thisrun = sp->curruns; - pb = sp->refruns; - b1 = *pb++; -#ifdef FAX3_DEBUG - printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail); - printf("-------------------- %d\n", tif->tif_row); - fflush(stdout); -#endif - EXPAND2D(EOFG4); - if (EOLcnt) - goto EOFG4; - (*sp->fill)(buf, thisrun, pa, lastx); - SETVALUE(0); /* imaginary change for reference */ - SWAP(uint32*, sp->curruns, sp->refruns); - buf += sp->b.rowbytes; - occ -= sp->b.rowbytes; - sp->line++; - continue; - EOFG4: - NeedBits16( 13, BADG4 ); - BADG4: -#ifdef FAX3_DEBUG - if( GetBits(13) != 0x1001 ) - fputs( "Bad EOFB\n", stderr ); -#endif - ClrBits( 13 ); - (*sp->fill)(buf, thisrun, pa, lastx); - UNCACHE_STATE(tif, sp); - return ( sp->line ? 1 : -1); /* don't error on badly-terminated strips */ - } - UNCACHE_STATE(tif, sp); - return (1); -} -#undef SWAP - -/* - * Encode the requested amount of data. - */ -static int -Fax4Encode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) -{ - static const char module[] = "Fax4Encode"; - Fax3CodecState *sp = EncoderState(tif); - (void) s; - if (cc % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be written"); - return (0); - } - while (cc > 0) { - if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->b.rowpixels)) - return (0); - _TIFFmemcpy(sp->refline, bp, sp->b.rowbytes); - bp += sp->b.rowbytes; - cc -= sp->b.rowbytes; - } - return (1); -} - -static int -Fax4PostEncode(TIFF* tif) -{ - Fax3CodecState *sp = EncoderState(tif); - - /* terminate strip w/ EOFB */ - Fax3PutBits(tif, EOL, 12); - Fax3PutBits(tif, EOL, 12); - if (sp->bit != 8) - Fax3FlushBits(tif, sp); - return (1); -} - -int -TIFFInitCCITTFax4(TIFF* tif, int scheme) -{ - (void) scheme; - if (InitCCITTFax3(tif)) { /* reuse G3 support */ - /* - * Merge codec-specific tag information. - */ - if (!_TIFFMergeFields(tif, fax4Fields, - TIFFArrayCount(fax4Fields))) { - TIFFErrorExt(tif->tif_clientdata, "TIFFInitCCITTFax4", - "Merging CCITT Fax 4 codec-specific tags failed"); - return 0; - } - - tif->tif_decoderow = Fax4Decode; - tif->tif_decodestrip = Fax4Decode; - tif->tif_decodetile = Fax4Decode; - tif->tif_encoderow = Fax4Encode; - tif->tif_encodestrip = Fax4Encode; - tif->tif_encodetile = Fax4Encode; - tif->tif_postencode = Fax4PostEncode; - /* - * Suppress RTC at the end of each strip. - */ - return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_NORTC); - } else - return (0); -} - -/* - * CCITT Group 3 1-D Modified Huffman RLE Compression Support. - * (Compression algorithms 2 and 32771) - */ - -/* - * Decode the requested amount of RLE-encoded data. - */ -static int -Fax3DecodeRLE(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) -{ - DECLARE_STATE(tif, sp, "Fax3DecodeRLE"); - int mode = sp->b.mode; - (void) s; - if (occ % sp->b.rowbytes) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); - return (-1); - } - CACHE_STATE(tif, sp); - thisrun = sp->curruns; - while (occ > 0) { - a0 = 0; - RunLength = 0; - pa = thisrun; -#ifdef FAX3_DEBUG - printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail); - printf("-------------------- %d\n", tif->tif_row); - fflush(stdout); -#endif - EXPAND1D(EOFRLE); - (*sp->fill)(buf, thisrun, pa, lastx); - /* - * Cleanup at the end of the row. - */ - if (mode & FAXMODE_BYTEALIGN) { - int n = BitsAvail - (BitsAvail &~ 7); - ClrBits(n); - } else if (mode & FAXMODE_WORDALIGN) { - int n = BitsAvail - (BitsAvail &~ 15); - ClrBits(n); - if (BitsAvail == 0 && !isAligned(cp, uint16)) - cp++; - } - buf += sp->b.rowbytes; - occ -= sp->b.rowbytes; - sp->line++; - continue; - EOFRLE: /* premature EOF */ - (*sp->fill)(buf, thisrun, pa, lastx); - UNCACHE_STATE(tif, sp); - return (-1); - } - UNCACHE_STATE(tif, sp); - return (1); -} - -int -TIFFInitCCITTRLE(TIFF* tif, int scheme) -{ - (void) scheme; - if (InitCCITTFax3(tif)) { /* reuse G3 support */ - tif->tif_decoderow = Fax3DecodeRLE; - tif->tif_decodestrip = Fax3DecodeRLE; - tif->tif_decodetile = Fax3DecodeRLE; - /* - * Suppress RTC+EOLs when encoding and byte-align data. - */ - return TIFFSetField(tif, TIFFTAG_FAXMODE, - FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_BYTEALIGN); - } else - return (0); -} - -int -TIFFInitCCITTRLEW(TIFF* tif, int scheme) -{ - (void) scheme; - if (InitCCITTFax3(tif)) { /* reuse G3 support */ - tif->tif_decoderow = Fax3DecodeRLE; - tif->tif_decodestrip = Fax3DecodeRLE; - tif->tif_decodetile = Fax3DecodeRLE; - /* - * Suppress RTC+EOLs when encoding and word-align data. - */ - return TIFFSetField(tif, TIFFTAG_FAXMODE, - FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_WORDALIGN); - } else - return (0); -} -#endif /* CCITT_SUPPORT */ - -/* vim: set ts=8 sts=8 sw=8 noet: */ -/* - * Local Variables: - * mode: c - * c-basic-offset: 8 - * fill-column: 78 - * End: - */ -- cgit v1.2.3