diff options
Diffstat (limited to 'src/libtiff/tif_write.c')
| -rw-r--r-- | src/libtiff/tif_write.c | 725 |
1 files changed, 725 insertions, 0 deletions
diff --git a/src/libtiff/tif_write.c b/src/libtiff/tif_write.c new file mode 100644 index 0000000..a07606f --- /dev/null +++ b/src/libtiff/tif_write.c @@ -0,0 +1,725 @@ +/* $Id: tif_write.c,v 1.1 2008/10/17 06:16:07 scuri Exp $ */ + +/* + * Copyright (c) 1988-1997 Sam Leffler + * Copyright (c) 1991-1997 Silicon Graphics, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that (i) the above copyright notices and this permission notice appear in + * all copies of the software and related documentation, and (ii) the names of + * Sam Leffler and Silicon Graphics may not be used in any advertising or + * publicity relating to the software without the specific, prior written + * permission of Sam Leffler and Silicon Graphics. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR + * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +/* + * TIFF Library. + * + * Scanline-oriented Write Support + */ +#include "tiffiop.h" +#include <stdio.h> + +#define STRIPINCR 20 /* expansion factor on strip array */ + +#define WRITECHECKSTRIPS(tif, module) \ + (((tif)->tif_flags&TIFF_BEENWRITING) || TIFFWriteCheck((tif),0,module)) +#define WRITECHECKTILES(tif, module) \ + (((tif)->tif_flags&TIFF_BEENWRITING) || TIFFWriteCheck((tif),1,module)) +#define BUFFERCHECK(tif) \ + ((((tif)->tif_flags & TIFF_BUFFERSETUP) && tif->tif_rawdata) || \ + TIFFWriteBufferSetup((tif), NULL, (tsize_t) -1)) + +static int TIFFGrowStrips(TIFF*, int, const char*); +static int TIFFAppendToStrip(TIFF*, tstrip_t, tidata_t, tsize_t); + +int +TIFFWriteScanline(TIFF* tif, tdata_t buf, uint32 row, tsample_t sample) +{ + static const char module[] = "TIFFWriteScanline"; + register TIFFDirectory *td; + int status, imagegrew = 0; + tstrip_t strip; + + if (!WRITECHECKSTRIPS(tif, module)) + return (-1); + /* + * Handle delayed allocation of data buffer. This + * permits it to be sized more intelligently (using + * directory information). + */ + if (!BUFFERCHECK(tif)) + return (-1); + td = &tif->tif_dir; + /* + * Extend image length if needed + * (but only for PlanarConfig=1). + */ + if (row >= td->td_imagelength) { /* extend image */ + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Can not change \"ImageLength\" when using separate planes"); + return (-1); + } + td->td_imagelength = row+1; + imagegrew = 1; + } + /* + * Calculate strip and check for crossings. + */ + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { + if (sample >= td->td_samplesperpixel) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%d: Sample out of range, max %d", + sample, td->td_samplesperpixel); + return (-1); + } + strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip; + } else + strip = row / td->td_rowsperstrip; + /* + * Check strip array to make sure there's space. We don't support + * dynamically growing files that have data organized in separate + * bitplanes because it's too painful. In that case we require that + * the imagelength be set properly before the first write (so that the + * strips array will be fully allocated above). + */ + if (strip >= td->td_nstrips && !TIFFGrowStrips(tif, 1, module)) + return (-1); + if (strip != tif->tif_curstrip) { + /* + * Changing strips -- flush any data present. + */ + if (!TIFFFlushData(tif)) + return (-1); + tif->tif_curstrip = strip; + /* + * Watch out for a growing image. The value of strips/image + * will initially be 1 (since it can't be deduced until the + * imagelength is known). + */ + if (strip >= td->td_stripsperimage && imagegrew) + td->td_stripsperimage = + TIFFhowmany(td->td_imagelength,td->td_rowsperstrip); + tif->tif_row = + (strip % td->td_stripsperimage) * td->td_rowsperstrip; + if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { + if (!(*tif->tif_setupencode)(tif)) + return (-1); + tif->tif_flags |= TIFF_CODERSETUP; + } + + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + + if( td->td_stripbytecount[strip] > 0 ) + { + /* if we are writing over existing tiles, zero length */ + td->td_stripbytecount[strip] = 0; + + /* this forces TIFFAppendToStrip() to do a seek */ + tif->tif_curoff = 0; + } + + if (!(*tif->tif_preencode)(tif, sample)) + return (-1); + tif->tif_flags |= TIFF_POSTENCODE; + } + /* + * Ensure the write is either sequential or at the + * beginning of a strip (or that we can randomly + * access the data -- i.e. no encoding). + */ + if (row != tif->tif_row) { + if (row < tif->tif_row) { + /* + * Moving backwards within the same strip: + * backup to the start and then decode + * forward (below). + */ + tif->tif_row = (strip % td->td_stripsperimage) * + td->td_rowsperstrip; + tif->tif_rawcp = tif->tif_rawdata; + } + /* + * Seek forward to the desired row. + */ + if (!(*tif->tif_seek)(tif, row - tif->tif_row)) + return (-1); + tif->tif_row = row; + } + + /* swab if needed - note that source buffer will be altered */ + tif->tif_postdecode( tif, (tidata_t) buf, tif->tif_scanlinesize ); + + status = (*tif->tif_encoderow)(tif, (tidata_t) buf, + tif->tif_scanlinesize, sample); + + /* we are now poised at the beginning of the next row */ + tif->tif_row = row + 1; + return (status); +} + +/* + * Encode the supplied data and write it to the + * specified strip. + * + * NB: Image length must be setup before writing. + */ +tsize_t +TIFFWriteEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t data, tsize_t cc) +{ + static const char module[] = "TIFFWriteEncodedStrip"; + TIFFDirectory *td = &tif->tif_dir; + tsample_t sample; + + if (!WRITECHECKSTRIPS(tif, module)) + return ((tsize_t) -1); + /* + * Check strip array to make sure there's space. + * We don't support dynamically growing files that + * have data organized in separate bitplanes because + * it's too painful. In that case we require that + * the imagelength be set properly before the first + * write (so that the strips array will be fully + * allocated above). + */ + if (strip >= td->td_nstrips) { + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Can not grow image by strips when using separate planes"); + return ((tsize_t) -1); + } + if (!TIFFGrowStrips(tif, 1, module)) + return ((tsize_t) -1); + td->td_stripsperimage = + TIFFhowmany(td->td_imagelength, td->td_rowsperstrip); + } + /* + * Handle delayed allocation of data buffer. This + * permits it to be sized according to the directory + * info. + */ + if (!BUFFERCHECK(tif)) + return ((tsize_t) -1); + tif->tif_curstrip = strip; + tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip; + if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { + if (!(*tif->tif_setupencode)(tif)) + return ((tsize_t) -1); + tif->tif_flags |= TIFF_CODERSETUP; + } + + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + + if( td->td_stripbytecount[strip] > 0 ) + { + /* if we are writing over existing tiles, zero length. */ + td->td_stripbytecount[strip] = 0; + + /* this forces TIFFAppendToStrip() to do a seek */ + tif->tif_curoff = 0; + } + + tif->tif_flags &= ~TIFF_POSTENCODE; + sample = (tsample_t)(strip / td->td_stripsperimage); + if (!(*tif->tif_preencode)(tif, sample)) + return ((tsize_t) -1); + + /* swab if needed - note that source buffer will be altered */ + tif->tif_postdecode( tif, (tidata_t) data, cc ); + + if (!(*tif->tif_encodestrip)(tif, (tidata_t) data, cc, sample)) + return ((tsize_t) 0); + if (!(*tif->tif_postencode)(tif)) + return ((tsize_t) -1); + if (!isFillOrder(tif, td->td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) + TIFFReverseBits(tif->tif_rawdata, tif->tif_rawcc); + if (tif->tif_rawcc > 0 && + !TIFFAppendToStrip(tif, strip, tif->tif_rawdata, tif->tif_rawcc)) + return ((tsize_t) -1); + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + return (cc); +} + +/* + * Write the supplied data to the specified strip. + * + * NB: Image length must be setup before writing. + */ +tsize_t +TIFFWriteRawStrip(TIFF* tif, tstrip_t strip, tdata_t data, tsize_t cc) +{ + static const char module[] = "TIFFWriteRawStrip"; + TIFFDirectory *td = &tif->tif_dir; + + if (!WRITECHECKSTRIPS(tif, module)) + return ((tsize_t) -1); + /* + * Check strip array to make sure there's space. + * We don't support dynamically growing files that + * have data organized in separate bitplanes because + * it's too painful. In that case we require that + * the imagelength be set properly before the first + * write (so that the strips array will be fully + * allocated above). + */ + if (strip >= td->td_nstrips) { + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Can not grow image by strips when using separate planes"); + return ((tsize_t) -1); + } + /* + * Watch out for a growing image. The value of + * strips/image will initially be 1 (since it + * can't be deduced until the imagelength is known). + */ + if (strip >= td->td_stripsperimage) + td->td_stripsperimage = + TIFFhowmany(td->td_imagelength,td->td_rowsperstrip); + if (!TIFFGrowStrips(tif, 1, module)) + return ((tsize_t) -1); + } + tif->tif_curstrip = strip; + tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip; + return (TIFFAppendToStrip(tif, strip, (tidata_t) data, cc) ? + cc : (tsize_t) -1); +} + +/* + * Write and compress a tile of data. The + * tile is selected by the (x,y,z,s) coordinates. + */ +tsize_t +TIFFWriteTile(TIFF* tif, + tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t s) +{ + if (!TIFFCheckTile(tif, x, y, z, s)) + return (-1); + /* + * NB: A tile size of -1 is used instead of tif_tilesize knowing + * that TIFFWriteEncodedTile will clamp this to the tile size. + * This is done because the tile size may not be defined until + * after the output buffer is setup in TIFFWriteBufferSetup. + */ + return (TIFFWriteEncodedTile(tif, + TIFFComputeTile(tif, x, y, z, s), buf, (tsize_t) -1)); +} + +/* + * Encode the supplied data and write it to the + * specified tile. There must be space for the + * data. The function clamps individual writes + * to a tile to the tile size, but does not (and + * can not) check that multiple writes to the same + * tile do not write more than tile size data. + * + * NB: Image length must be setup before writing; this + * interface does not support automatically growing + * the image on each write (as TIFFWriteScanline does). + */ +tsize_t +TIFFWriteEncodedTile(TIFF* tif, ttile_t tile, tdata_t data, tsize_t cc) +{ + static const char module[] = "TIFFWriteEncodedTile"; + TIFFDirectory *td; + tsample_t sample; + + if (!WRITECHECKTILES(tif, module)) + return ((tsize_t) -1); + td = &tif->tif_dir; + if (tile >= td->td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: Tile %lu out of range, max %lu", + tif->tif_name, (unsigned long) tile, (unsigned long) td->td_nstrips); + return ((tsize_t) -1); + } + /* + * Handle delayed allocation of data buffer. This + * permits it to be sized more intelligently (using + * directory information). + */ + if (!BUFFERCHECK(tif)) + return ((tsize_t) -1); + tif->tif_curtile = tile; + + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + + if( td->td_stripbytecount[tile] > 0 ) + { + /* if we are writing over existing tiles, zero length. */ + td->td_stripbytecount[tile] = 0; + + /* this forces TIFFAppendToStrip() to do a seek */ + tif->tif_curoff = 0; + } + + /* + * Compute tiles per row & per column to compute + * current row and column + */ + tif->tif_row = (tile % TIFFhowmany(td->td_imagelength, td->td_tilelength)) + * td->td_tilelength; + tif->tif_col = (tile % TIFFhowmany(td->td_imagewidth, td->td_tilewidth)) + * td->td_tilewidth; + + if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { + if (!(*tif->tif_setupencode)(tif)) + return ((tsize_t) -1); + tif->tif_flags |= TIFF_CODERSETUP; + } + tif->tif_flags &= ~TIFF_POSTENCODE; + sample = (tsample_t)(tile/td->td_stripsperimage); + if (!(*tif->tif_preencode)(tif, sample)) + return ((tsize_t) -1); + /* + * Clamp write amount to the tile size. This is mostly + * done so that callers can pass in some large number + * (e.g. -1) and have the tile size used instead. + */ + if ( cc < 1 || cc > tif->tif_tilesize) + cc = tif->tif_tilesize; + + /* swab if needed - note that source buffer will be altered */ + tif->tif_postdecode( tif, (tidata_t) data, cc ); + + if (!(*tif->tif_encodetile)(tif, (tidata_t) data, cc, sample)) + return ((tsize_t) 0); + if (!(*tif->tif_postencode)(tif)) + return ((tsize_t) -1); + if (!isFillOrder(tif, td->td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) + TIFFReverseBits((unsigned char *)tif->tif_rawdata, tif->tif_rawcc); + if (tif->tif_rawcc > 0 && !TIFFAppendToStrip(tif, tile, + tif->tif_rawdata, tif->tif_rawcc)) + return ((tsize_t) -1); + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + return (cc); +} + +/* + * Write the supplied data to the specified strip. + * There must be space for the data; we don't check + * if strips overlap! + * + * NB: Image length must be setup before writing; this + * interface does not support automatically growing + * the image on each write (as TIFFWriteScanline does). + */ +tsize_t +TIFFWriteRawTile(TIFF* tif, ttile_t tile, tdata_t data, tsize_t cc) +{ + static const char module[] = "TIFFWriteRawTile"; + + if (!WRITECHECKTILES(tif, module)) + return ((tsize_t) -1); + if (tile >= tif->tif_dir.td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: Tile %lu out of range, max %lu", + tif->tif_name, (unsigned long) tile, + (unsigned long) tif->tif_dir.td_nstrips); + return ((tsize_t) -1); + } + return (TIFFAppendToStrip(tif, tile, (tidata_t) data, cc) ? + cc : (tsize_t) -1); +} + +#define isUnspecified(tif, f) \ + (TIFFFieldSet(tif,f) && (tif)->tif_dir.td_imagelength == 0) + +int +TIFFSetupStrips(TIFF* tif) +{ + TIFFDirectory* td = &tif->tif_dir; + + if (isTiled(tif)) + td->td_stripsperimage = + isUnspecified(tif, FIELD_TILEDIMENSIONS) ? + td->td_samplesperpixel : TIFFNumberOfTiles(tif); + else + td->td_stripsperimage = + isUnspecified(tif, FIELD_ROWSPERSTRIP) ? + td->td_samplesperpixel : TIFFNumberOfStrips(tif); + td->td_nstrips = td->td_stripsperimage; + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) + td->td_stripsperimage /= td->td_samplesperpixel; + td->td_stripoffset = (uint32 *) + _TIFFmalloc(td->td_nstrips * sizeof (uint32)); + td->td_stripbytecount = (uint32 *) + _TIFFmalloc(td->td_nstrips * sizeof (uint32)); + if (td->td_stripoffset == NULL || td->td_stripbytecount == NULL) + return (0); + /* + * Place data at the end-of-file + * (by setting offsets to zero). + */ + _TIFFmemset(td->td_stripoffset, 0, td->td_nstrips*sizeof (uint32)); + _TIFFmemset(td->td_stripbytecount, 0, td->td_nstrips*sizeof (uint32)); + TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS); + TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); + return (1); +} +#undef isUnspecified + +/* + * Verify file is writable and that the directory + * information is setup properly. In doing the latter + * we also "freeze" the state of the directory so + * that important information is not changed. + */ +int +TIFFWriteCheck(TIFF* tif, int tiles, const char* module) +{ + if (tif->tif_mode == O_RDONLY) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: File not open for writing", + tif->tif_name); + return (0); + } + if (tiles ^ isTiled(tif)) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, tiles ? + "Can not write tiles to a stripped image" : + "Can not write scanlines to a tiled image"); + return (0); + } + + /* + * On the first write verify all the required information + * has been setup and initialize any data structures that + * had to wait until directory information was set. + * Note that a lot of our work is assumed to remain valid + * because we disallow any of the important parameters + * from changing after we start writing (i.e. once + * TIFF_BEENWRITING is set, TIFFSetField will only allow + * the image's length to be changed). + */ + if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Must set \"ImageWidth\" before writing data", + tif->tif_name); + return (0); + } + if (tif->tif_dir.td_samplesperpixel == 1) { + /* + * Planarconfiguration is irrelevant in case of single band + * images and need not be included. We will set it anyway, + * because this field is used in other parts of library even + * in the single band case. + */ + tif->tif_dir.td_planarconfig = PLANARCONFIG_CONTIG; + } else { + if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Must set \"PlanarConfiguration\" before writing data", + tif->tif_name); + return (0); + } + } + if (tif->tif_dir.td_stripoffset == NULL && !TIFFSetupStrips(tif)) { + tif->tif_dir.td_nstrips = 0; + TIFFErrorExt(tif->tif_clientdata, module, "%s: No space for %s arrays", + tif->tif_name, isTiled(tif) ? "tile" : "strip"); + return (0); + } + tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tsize_t) -1; + tif->tif_scanlinesize = TIFFScanlineSize(tif); + tif->tif_flags |= TIFF_BEENWRITING; + return (1); +} + +/* + * Setup the raw data buffer used for encoding. + */ +int +TIFFWriteBufferSetup(TIFF* tif, tdata_t bp, tsize_t size) +{ + static const char module[] = "TIFFWriteBufferSetup"; + + if (tif->tif_rawdata) { + if (tif->tif_flags & TIFF_MYBUFFER) { + _TIFFfree(tif->tif_rawdata); + tif->tif_flags &= ~TIFF_MYBUFFER; + } + tif->tif_rawdata = NULL; + } + if (size == (tsize_t) -1) { + size = (isTiled(tif) ? + tif->tif_tilesize : TIFFStripSize(tif)); + /* + * Make raw data buffer at least 8K + */ + if (size < 8*1024) + size = 8*1024; + bp = NULL; /* NB: force malloc */ + } + if (bp == NULL) { + bp = _TIFFmalloc(size); + if (bp == NULL) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: No space for output buffer", + tif->tif_name); + return (0); + } + tif->tif_flags |= TIFF_MYBUFFER; + } else + tif->tif_flags &= ~TIFF_MYBUFFER; + tif->tif_rawdata = (tidata_t) bp; + tif->tif_rawdatasize = size; + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + tif->tif_flags |= TIFF_BUFFERSETUP; + return (1); +} + +/* + * Grow the strip data structures by delta strips. + */ +static int +TIFFGrowStrips(TIFF* tif, int delta, const char* module) +{ + TIFFDirectory *td = &tif->tif_dir; + uint32 *new_stripoffset, *new_stripbytecount; + + assert(td->td_planarconfig == PLANARCONFIG_CONTIG); + new_stripoffset = (uint32*)_TIFFrealloc(td->td_stripoffset, + (td->td_nstrips + delta) * sizeof (uint32)); + new_stripbytecount = (uint32*)_TIFFrealloc(td->td_stripbytecount, + (td->td_nstrips + delta) * sizeof (uint32)); + if (new_stripoffset == NULL || new_stripbytecount == NULL) { + if (new_stripoffset) + _TIFFfree(new_stripoffset); + if (new_stripbytecount) + _TIFFfree(new_stripbytecount); + td->td_nstrips = 0; + TIFFErrorExt(tif->tif_clientdata, module, "%s: No space to expand strip arrays", + tif->tif_name); + return (0); + } + td->td_stripoffset = new_stripoffset; + td->td_stripbytecount = new_stripbytecount; + _TIFFmemset(td->td_stripoffset + td->td_nstrips, + 0, delta*sizeof (uint32)); + _TIFFmemset(td->td_stripbytecount + td->td_nstrips, + 0, delta*sizeof (uint32)); + td->td_nstrips += delta; + return (1); +} + +/* + * Append the data to the specified strip. + */ +static int +TIFFAppendToStrip(TIFF* tif, tstrip_t strip, tidata_t data, tsize_t cc) +{ + TIFFDirectory *td = &tif->tif_dir; + static const char module[] = "TIFFAppendToStrip"; + + if (td->td_stripoffset[strip] == 0 || tif->tif_curoff == 0) { + /* + * No current offset, set the current strip. + */ + assert(td->td_nstrips > 0); + if (td->td_stripoffset[strip] != 0) { + /* + * Prevent overlapping of the data chunks. We need + * this to enable in place updating of the compressed + * images. Larger blocks will be moved at the end of + * the file without any optimization of the spare + * space, so such scheme is not too much effective. + */ + if (td->td_stripbytecountsorted) { + if (strip == td->td_nstrips - 1 + || td->td_stripoffset[strip + 1] < + td->td_stripoffset[strip] + cc) { + td->td_stripoffset[strip] = + TIFFSeekFile(tif, (toff_t)0, + SEEK_END); + } + } else { + tstrip_t i; + for (i = 0; i < td->td_nstrips; i++) { + if (td->td_stripoffset[i] > + td->td_stripoffset[strip] + && td->td_stripoffset[i] < + td->td_stripoffset[strip] + cc) { + td->td_stripoffset[strip] = + TIFFSeekFile(tif, + (toff_t)0, + SEEK_END); + } + } + } + + if (!SeekOK(tif, td->td_stripoffset[strip])) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Seek error at scanline %lu", + tif->tif_name, + (unsigned long)tif->tif_row); + return (0); + } + } else + td->td_stripoffset[strip] = + TIFFSeekFile(tif, (toff_t) 0, SEEK_END); + tif->tif_curoff = td->td_stripoffset[strip]; + } + + if (!WriteOK(tif, data, cc)) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: Write error at scanline %lu", + tif->tif_name, (unsigned long) tif->tif_row); + return (0); + } + tif->tif_curoff += cc; + td->td_stripbytecount[strip] += cc; + return (1); +} + +/* + * Internal version of TIFFFlushData that can be + * called by ``encodestrip routines'' w/o concern + * for infinite recursion. + */ +int +TIFFFlushData1(TIFF* tif) +{ + if (tif->tif_rawcc > 0) { + if (!isFillOrder(tif, tif->tif_dir.td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) + TIFFReverseBits((unsigned char *)tif->tif_rawdata, + tif->tif_rawcc); + if (!TIFFAppendToStrip(tif, + isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip, + tif->tif_rawdata, tif->tif_rawcc)) + return (0); + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + } + return (1); +} + +/* + * Set the current write offset. This should only be + * used to set the offset to a known previous location + * (very carefully), or to 0 so that the next write gets + * appended to the end of the file. + */ +void +TIFFSetWriteOffset(TIFF* tif, toff_t off) +{ + tif->tif_curoff = off; +} + +/* vim: set ts=8 sts=8 sw=8 noet: */ |