Index: third_party/tiff_v403/tif_fax3.c |
diff --git a/third_party/tiff_v403/tif_fax3.c b/third_party/tiff_v403/tif_fax3.c |
deleted file mode 100644 |
index 7ec8faa8b088ed701d3bc3f6b5992ff1f63a391e..0000000000000000000000000000000000000000 |
--- a/third_party/tiff_v403/tif_fax3.c |
+++ /dev/null |
@@ -1,1623 +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 <stdio.h> |
- |
-/* |
- * 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,bx_;/* add bx_ = 8-bx for avoid ms evc compiler bug*/ |
- 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; |
-// } |
-//Modify by Sunliang.Liu 20090804 |
-//Detail: For avoid ms evc compiler bug in WCE ARMV4(I) Release |
- bx_ = 8-bx; |
- if (run > bx_) { |
- if (bx) { /* align to byte boundary */ |
- *cp++ &= 0xff << bx_; |
- run -= 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; |
- } |
-#ifdef FAX3_DEBUG |
- printf("_TIFFFax3fillruns ZERO: %d\n",n); |
-#endif |
- 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; |
- } |
-#ifdef FAX3_DEBUG |
- printf("_TIFFFax3fillruns FILL: %d\n",n); |
-#endif |
- 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<<t) ? '1' : '0'); \ |
- putchar('\n'); \ |
-} |
-#endif |
- |
-/* |
- * Write the sequence of codes that describes |
- * the specified span of zero's or one's. The |
- * appropriate table that holds the make-up and |
- * terminating codes is supplied. |
- */ |
-static void |
-putspan(TIFF* tif, int32 span, const tableentry* tab) |
-{ |
- Fax3CodecState* sp = EncoderState(tif); |
- unsigned int bit = sp->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) |
-{ |
-#ifdef FAX3_DEBUG |
- FILE* file; |
-#endif |
- 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); |
-#ifdef FAX3_DEBUG |
- file = fopen("fillbuf.txt", "a"); |
- fwrite(buf, sp->b.rowbytes, 1, file); |
- fclose(file); |
-#endif |
- 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); |
-#ifdef FAX3_DEBUG |
- file = fopen("fillbuf.txt", "a"); |
- fwrite(buf, sp->b.rowbytes, 1, file); |
- fclose(file); |
-#endif |
- 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: |
- */ |
- |