blob: 6631a782fd3c2fbed0decdac640ee8e164b92b88 [file] [log] [blame]
/*
* 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, (tmsize_t)-1))
static int TIFFGrowStrips(TIFF *tif, uint32_t delta, const char *module);
static int TIFFAppendToStrip(TIFF *tif, uint32_t strip, uint8_t *data,
tmsize_t cc);
int TIFFWriteScanline(TIFF *tif, void *buf, uint32_t row, uint16_t sample)
{
static const char module[] = "TIFFWriteScanline";
register TIFFDirectory *td;
int status, imagegrew = 0;
uint32_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);
tif->tif_flags |= TIFF_BUF4WRITE; /* not strictly sure this is right*/
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)
{
TIFFErrorExtR(
tif, module,
"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)
{
TIFFErrorExtR(tif, module, "%lu: Sample out of range, max %lu",
(unsigned long)sample,
(unsigned long)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_32(td->td_imagelength, td->td_rowsperstrip);
if (td->td_stripsperimage == 0)
{
TIFFErrorExtR(tif, module, "Zero strips per image");
return (-1);
}
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;
/* this informs TIFFAppendToStrip() we have changed strip */
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, (uint8_t *)buf, tif->tif_scanlinesize);
status = (*tif->tif_encoderow)(tif, (uint8_t *)buf, tif->tif_scanlinesize,
sample);
/* we are now poised at the beginning of the next row */
tif->tif_row = row + 1;
return (status);
}
/* Make sure that at the first attempt of rewriting a tile/strip, we will have
*/
/* more bytes available in the output buffer than the previous byte count, */
/* so that TIFFAppendToStrip() will detect the overflow when it is called the
* first */
/* time if the new compressed tile is bigger than the older one. (GDAL #4771) */
static int _TIFFReserveLargeEnoughWriteBuffer(TIFF *tif, uint32_t strip_or_tile)
{
TIFFDirectory *td = &tif->tif_dir;
if (td->td_stripbytecount_p[strip_or_tile] > 0)
{
/* The +1 is to ensure at least one extra bytes */
/* The +4 is because the LZW encoder flushes 4 bytes before the limit */
uint64_t safe_buffer_size =
(uint64_t)(td->td_stripbytecount_p[strip_or_tile] + 1 + 4);
if (tif->tif_rawdatasize <= (tmsize_t)safe_buffer_size)
{
if (!(TIFFWriteBufferSetup(
tif, NULL,
(tmsize_t)TIFFroundup_64(safe_buffer_size, 1024))))
return 0;
}
}
return 1;
}
/*
* Encode the supplied data and write it to the
* specified strip.
*
* NB: Image length must be setup before writing.
*/
tmsize_t TIFFWriteEncodedStrip(TIFF *tif, uint32_t strip, void *data,
tmsize_t cc)
{
static const char module[] = "TIFFWriteEncodedStrip";
TIFFDirectory *td = &tif->tif_dir;
uint16_t sample;
if (!WRITECHECKSTRIPS(tif, module))
return ((tmsize_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)
{
TIFFErrorExtR(
tif, module,
"Can not grow image by strips when using separate planes");
return ((tmsize_t)-1);
}
if (!TIFFGrowStrips(tif, 1, module))
return ((tmsize_t)-1);
td->td_stripsperimage =
TIFFhowmany_32(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 ((tmsize_t)-1);
tif->tif_flags |= TIFF_BUF4WRITE;
tif->tif_curstrip = strip;
/* this informs TIFFAppendToStrip() we have changed or reset strip */
tif->tif_curoff = 0;
if (!_TIFFReserveLargeEnoughWriteBuffer(tif, strip))
{
return ((tmsize_t)(-1));
}
tif->tif_rawcc = 0;
tif->tif_rawcp = tif->tif_rawdata;
if (td->td_stripsperimage == 0)
{
TIFFErrorExtR(tif, module, "Zero strips per image");
return ((tmsize_t)-1);
}
tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
if ((tif->tif_flags & TIFF_CODERSETUP) == 0)
{
if (!(*tif->tif_setupencode)(tif))
return ((tmsize_t)-1);
tif->tif_flags |= TIFF_CODERSETUP;
}
tif->tif_flags &= ~TIFF_POSTENCODE;
/* shortcut to avoid an extra memcpy() */
if (td->td_compression == COMPRESSION_NONE)
{
/* swab if needed - note that source buffer will be altered */
tif->tif_postdecode(tif, (uint8_t *)data, cc);
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits((uint8_t *)data, cc);
if (cc > 0 && !TIFFAppendToStrip(tif, strip, (uint8_t *)data, cc))
return ((tmsize_t)-1);
return (cc);
}
sample = (uint16_t)(strip / td->td_stripsperimage);
if (!(*tif->tif_preencode)(tif, sample))
return ((tmsize_t)-1);
/* swab if needed - note that source buffer will be altered */
tif->tif_postdecode(tif, (uint8_t *)data, cc);
if (!(*tif->tif_encodestrip)(tif, (uint8_t *)data, cc, sample))
return ((tmsize_t)-1);
if (!(*tif->tif_postencode)(tif))
return ((tmsize_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 ((tmsize_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.
*/
tmsize_t TIFFWriteRawStrip(TIFF *tif, uint32_t strip, void *data, tmsize_t cc)
{
static const char module[] = "TIFFWriteRawStrip";
TIFFDirectory *td = &tif->tif_dir;
if (!WRITECHECKSTRIPS(tif, module))
return ((tmsize_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)
{
TIFFErrorExtR(
tif, module,
"Can not grow image by strips when using separate planes");
return ((tmsize_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_32(td->td_imagelength, td->td_rowsperstrip);
if (!TIFFGrowStrips(tif, 1, module))
return ((tmsize_t)-1);
}
if (tif->tif_curstrip != strip)
{
tif->tif_curstrip = strip;
/* this informs TIFFAppendToStrip() we have changed or reset strip */
tif->tif_curoff = 0;
}
if (td->td_stripsperimage == 0)
{
TIFFErrorExtR(tif, module, "Zero strips per image");
return ((tmsize_t)-1);
}
tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
return (TIFFAppendToStrip(tif, strip, (uint8_t *)data, cc) ? cc
: (tmsize_t)-1);
}
/*
* Write and compress a tile of data. The
* tile is selected by the (x,y,z,s) coordinates.
*/
tmsize_t TIFFWriteTile(TIFF *tif, void *buf, uint32_t x, uint32_t y, uint32_t z,
uint16_t s)
{
if (!TIFFCheckTile(tif, x, y, z, s))
return ((tmsize_t)(-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,
(tmsize_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).
*/
tmsize_t TIFFWriteEncodedTile(TIFF *tif, uint32_t tile, void *data, tmsize_t cc)
{
static const char module[] = "TIFFWriteEncodedTile";
TIFFDirectory *td;
uint16_t sample;
uint32_t howmany32;
if (!WRITECHECKTILES(tif, module))
return ((tmsize_t)(-1));
td = &tif->tif_dir;
if (tile >= td->td_nstrips)
{
TIFFErrorExtR(tif, module, "Tile %lu out of range, max %lu",
(unsigned long)tile, (unsigned long)td->td_nstrips);
return ((tmsize_t)(-1));
}
/*
* Handle delayed allocation of data buffer. This
* permits it to be sized more intelligently (using
* directory information).
*/
if (!BUFFERCHECK(tif))
return ((tmsize_t)(-1));
tif->tif_flags |= TIFF_BUF4WRITE;
tif->tif_curtile = tile;
/* this informs TIFFAppendToStrip() we have changed or reset tile */
tif->tif_curoff = 0;
if (!_TIFFReserveLargeEnoughWriteBuffer(tif, tile))
{
return ((tmsize_t)(-1));
}
tif->tif_rawcc = 0;
tif->tif_rawcp = tif->tif_rawdata;
/*
* Compute tiles per row & per column to compute
* current row and column
*/
howmany32 = TIFFhowmany_32(td->td_imagelength, td->td_tilelength);
if (howmany32 == 0)
{
TIFFErrorExtR(tif, module, "Zero tiles");
return ((tmsize_t)(-1));
}
tif->tif_row = (tile % howmany32) * td->td_tilelength;
howmany32 = TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth);
if (howmany32 == 0)
{
TIFFErrorExtR(tif, module, "Zero tiles");
return ((tmsize_t)(-1));
}
tif->tif_col = (tile % howmany32) * td->td_tilewidth;
if ((tif->tif_flags & TIFF_CODERSETUP) == 0)
{
if (!(*tif->tif_setupencode)(tif))
return ((tmsize_t)(-1));
tif->tif_flags |= TIFF_CODERSETUP;
}
tif->tif_flags &= ~TIFF_POSTENCODE;
/*
* 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;
/* shortcut to avoid an extra memcpy() */
if (td->td_compression == COMPRESSION_NONE)
{
/* swab if needed - note that source buffer will be altered */
tif->tif_postdecode(tif, (uint8_t *)data, cc);
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits((uint8_t *)data, cc);
if (cc > 0 && !TIFFAppendToStrip(tif, tile, (uint8_t *)data, cc))
return ((tmsize_t)-1);
return (cc);
}
sample = (uint16_t)(tile / td->td_stripsperimage);
if (!(*tif->tif_preencode)(tif, sample))
return ((tmsize_t)(-1));
/* swab if needed - note that source buffer will be altered */
tif->tif_postdecode(tif, (uint8_t *)data, cc);
if (!(*tif->tif_encodetile)(tif, (uint8_t *)data, cc, sample))
return ((tmsize_t)-1);
if (!(*tif->tif_postencode)(tif))
return ((tmsize_t)(-1));
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits((uint8_t *)tif->tif_rawdata, tif->tif_rawcc);
if (tif->tif_rawcc > 0 &&
!TIFFAppendToStrip(tif, tile, tif->tif_rawdata, tif->tif_rawcc))
return ((tmsize_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).
*/
tmsize_t TIFFWriteRawTile(TIFF *tif, uint32_t tile, void *data, tmsize_t cc)
{
static const char module[] = "TIFFWriteRawTile";
if (!WRITECHECKTILES(tif, module))
return ((tmsize_t)(-1));
if (tile >= tif->tif_dir.td_nstrips)
{
TIFFErrorExtR(tif, module, "Tile %lu out of range, max %lu",
(unsigned long)tile,
(unsigned long)tif->tif_dir.td_nstrips);
return ((tmsize_t)(-1));
}
return (TIFFAppendToStrip(tif, tile, (uint8_t *)data, cc) ? cc
: (tmsize_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;
/* TIFFWriteDirectoryTagData has a limitation to 0x80000000U bytes */
if (td->td_nstrips >=
0x80000000U / ((tif->tif_flags & TIFF_BIGTIFF) ? 0x8U : 0x4U))
{
TIFFErrorExtR(tif, "TIFFSetupStrips",
"Too large Strip/Tile Offsets/ByteCounts arrays");
return 0;
}
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
td->td_stripsperimage /= td->td_samplesperpixel;
td->td_stripoffset_p = (uint64_t *)_TIFFCheckMalloc(
tif, td->td_nstrips, sizeof(uint64_t), "for \"StripOffsets\" array");
td->td_stripbytecount_p = (uint64_t *)_TIFFCheckMalloc(
tif, td->td_nstrips, sizeof(uint64_t), "for \"StripByteCounts\" array");
if (td->td_stripoffset_p == NULL || td->td_stripbytecount_p == NULL)
return (0);
/*
* Place data at the end-of-file
* (by setting offsets to zero).
*/
_TIFFmemset(td->td_stripoffset_p, 0, td->td_nstrips * sizeof(uint64_t));
_TIFFmemset(td->td_stripbytecount_p, 0, td->td_nstrips * sizeof(uint64_t));
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)
{
TIFFErrorExtR(tif, module, "File not open for writing");
return (0);
}
if (tiles ^ isTiled(tif))
{
TIFFErrorExtR(tif, module,
tiles ? "Can not write tiles to a striped image"
: "Can not write scanlines to a tiled image");
return (0);
}
_TIFFFillStriles(tif);
/*
* 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))
{
TIFFErrorExtR(tif, module,
"Must set \"ImageWidth\" before writing data");
return (0);
}
if (tif->tif_dir.td_stripoffset_p == NULL && !TIFFSetupStrips(tif))
{
tif->tif_dir.td_nstrips = 0;
TIFFErrorExtR(tif, module, "No space for %s arrays",
isTiled(tif) ? "tile" : "strip");
return (0);
}
if (isTiled(tif))
{
tif->tif_tilesize = TIFFTileSize(tif);
if (tif->tif_tilesize == 0)
return (0);
}
else
tif->tif_tilesize = (tmsize_t)(-1);
tif->tif_scanlinesize = TIFFScanlineSize(tif);
if (tif->tif_scanlinesize == 0)
return (0);
tif->tif_flags |= TIFF_BEENWRITING;
if (tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 &&
!(tif->tif_flags & TIFF_DIRTYDIRECT))
{
TIFFForceStrileArrayWriting(tif);
}
return (1);
}
/*
* Setup the raw data buffer used for encoding.
*/
int TIFFWriteBufferSetup(TIFF *tif, void *bp, tmsize_t size)
{
static const char module[] = "TIFFWriteBufferSetup";
if (tif->tif_rawdata)
{
if (tif->tif_flags & TIFF_MYBUFFER)
{
_TIFFfreeExt(tif, tif->tif_rawdata);
tif->tif_flags &= ~TIFF_MYBUFFER;
}
tif->tif_rawdata = NULL;
}
if (size == (tmsize_t)(-1))
{
size = (isTiled(tif) ? tif->tif_tilesize : TIFFStripSize(tif));
/* Adds 10% margin for cases where compression would expand a bit */
if (size < TIFF_TMSIZE_T_MAX - size / 10)
size += size / 10;
/*
* Make raw data buffer at least 8K
*/
if (size < 8 * 1024)
size = 8 * 1024;
bp = NULL; /* NB: force malloc */
}
if (bp == NULL)
{
bp = _TIFFmallocExt(tif, size);
if (bp == NULL)
{
TIFFErrorExtR(tif, module, "No space for output buffer");
return (0);
}
tif->tif_flags |= TIFF_MYBUFFER;
}
else
tif->tif_flags &= ~TIFF_MYBUFFER;
tif->tif_rawdata = (uint8_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, uint32_t delta, const char *module)
{
TIFFDirectory *td = &tif->tif_dir;
uint64_t *new_stripoffset;
uint64_t *new_stripbytecount;
assert(td->td_planarconfig == PLANARCONFIG_CONTIG);
new_stripoffset = (uint64_t *)_TIFFreallocExt(
tif, td->td_stripoffset_p, (td->td_nstrips + delta) * sizeof(uint64_t));
new_stripbytecount = (uint64_t *)_TIFFreallocExt(
tif, td->td_stripbytecount_p,
(td->td_nstrips + delta) * sizeof(uint64_t));
if (new_stripoffset == NULL || new_stripbytecount == NULL)
{
if (new_stripoffset)
_TIFFfreeExt(tif, new_stripoffset);
if (new_stripbytecount)
_TIFFfreeExt(tif, new_stripbytecount);
td->td_nstrips = 0;
TIFFErrorExtR(tif, module, "No space to expand strip arrays");
return (0);
}
td->td_stripoffset_p = new_stripoffset;
td->td_stripbytecount_p = new_stripbytecount;
_TIFFmemset(td->td_stripoffset_p + td->td_nstrips, 0,
delta * sizeof(uint64_t));
_TIFFmemset(td->td_stripbytecount_p + td->td_nstrips, 0,
delta * sizeof(uint64_t));
td->td_nstrips += delta;
tif->tif_flags |= TIFF_DIRTYDIRECT;
return (1);
}
/*
* Append the data to the specified strip.
*/
static int TIFFAppendToStrip(TIFF *tif, uint32_t strip, uint8_t *data,
tmsize_t cc)
{
static const char module[] = "TIFFAppendToStrip";
TIFFDirectory *td = &tif->tif_dir;
uint64_t m;
int64_t old_byte_count = -1;
if (tif->tif_curoff == 0)
tif->tif_lastvalidoff = 0;
if (td->td_stripoffset_p[strip] == 0 || tif->tif_curoff == 0)
{
assert(td->td_nstrips > 0);
if (td->td_stripbytecount_p[strip] != 0 &&
td->td_stripoffset_p[strip] != 0 &&
td->td_stripbytecount_p[strip] >= (uint64_t)cc)
{
/*
* There is already tile data on disk, and the new tile
* data we have will fit in the same space. The only
* aspect of this that is risky is that there could be
* more data to append to this strip before we are done
* depending on how we are getting called.
*/
if (!SeekOK(tif, td->td_stripoffset_p[strip]))
{
TIFFErrorExtR(tif, module, "Seek error at scanline %lu",
(unsigned long)tif->tif_row);
return (0);
}
tif->tif_lastvalidoff =
td->td_stripoffset_p[strip] + td->td_stripbytecount_p[strip];
}
else
{
/*
* Seek to end of file, and set that as our location to
* write this strip.
*/
td->td_stripoffset_p[strip] = TIFFSeekFile(tif, 0, SEEK_END);
tif->tif_flags |= TIFF_DIRTYSTRIP;
}
tif->tif_curoff = td->td_stripoffset_p[strip];
/*
* We are starting a fresh strip/tile, so set the size to zero.
*/
old_byte_count = td->td_stripbytecount_p[strip];
td->td_stripbytecount_p[strip] = 0;
}
m = tif->tif_curoff + cc;
if (!(tif->tif_flags & TIFF_BIGTIFF))
m = (uint32_t)m;
if ((m < tif->tif_curoff) || (m < (uint64_t)cc))
{
TIFFErrorExtR(tif, module, "Maximum TIFF file size exceeded");
return (0);
}
if (tif->tif_lastvalidoff != 0 && m > tif->tif_lastvalidoff &&
td->td_stripbytecount_p[strip] > 0)
{
/* Ouch: we have detected that we are rewriting in place a strip/tile */
/* with several calls to TIFFAppendToStrip(). The first call was with */
/* a size smaller than the previous size of the strip/tile, so we */
/* opted to rewrite in place, but a following call causes us to go */
/* outsize of the strip/tile area, so we have to finally go for a */
/* append-at-end-of-file strategy, and start by moving what we already
*/
/* wrote. */
tmsize_t tempSize;
void *temp;
uint64_t offsetRead;
uint64_t offsetWrite;
uint64_t toCopy = td->td_stripbytecount_p[strip];
if (toCopy < 1024 * 1024)
tempSize = (tmsize_t)toCopy;
else
tempSize = 1024 * 1024;
offsetRead = td->td_stripoffset_p[strip];
offsetWrite = TIFFSeekFile(tif, 0, SEEK_END);
m = offsetWrite + toCopy + cc;
if (!(tif->tif_flags & TIFF_BIGTIFF) && m != (uint32_t)m)
{
TIFFErrorExtR(tif, module, "Maximum TIFF file size exceeded");
return (0);
}
temp = _TIFFmallocExt(tif, tempSize);
if (temp == NULL)
{
TIFFErrorExtR(tif, module, "No space for output buffer");
return (0);
}
tif->tif_flags |= TIFF_DIRTYSTRIP;
td->td_stripoffset_p[strip] = offsetWrite;
td->td_stripbytecount_p[strip] = 0;
/* Move data written by previous calls to us at end of file */
while (toCopy > 0)
{
if (!SeekOK(tif, offsetRead))
{
TIFFErrorExtR(tif, module, "Seek error");
_TIFFfreeExt(tif, temp);
return (0);
}
if (!ReadOK(tif, temp, tempSize))
{
TIFFErrorExtR(tif, module, "Cannot read");
_TIFFfreeExt(tif, temp);
return (0);
}
if (!SeekOK(tif, offsetWrite))
{
TIFFErrorExtR(tif, module, "Seek error");
_TIFFfreeExt(tif, temp);
return (0);
}
if (!WriteOK(tif, temp, tempSize))
{
TIFFErrorExtR(tif, module, "Cannot write");
_TIFFfreeExt(tif, temp);
return (0);
}
offsetRead += tempSize;
offsetWrite += tempSize;
td->td_stripbytecount_p[strip] += tempSize;
toCopy -= tempSize;
}
_TIFFfreeExt(tif, temp);
/* Append the data of this call */
offsetWrite += cc;
m = offsetWrite;
}
if (!WriteOK(tif, data, cc))
{
TIFFErrorExtR(tif, module, "Write error at scanline %lu",
(unsigned long)tif->tif_row);
return (0);
}
tif->tif_curoff = m;
td->td_stripbytecount_p[strip] += cc;
if ((int64_t)td->td_stripbytecount_p[strip] != old_byte_count)
tif->tif_flags |= TIFF_DIRTYSTRIP;
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 && tif->tif_flags & TIFF_BUF4WRITE)
{
if (!isFillOrder(tif, tif->tif_dir.td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits((uint8_t *)tif->tif_rawdata, tif->tif_rawcc);
if (!TIFFAppendToStrip(
tif, isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip,
tif->tif_rawdata, tif->tif_rawcc))
{
/* We update those variables even in case of error since there's */
/* code that doesn't really check the return code of this */
/* function */
tif->tif_rawcc = 0;
tif->tif_rawcp = tif->tif_rawdata;
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;
tif->tif_lastvalidoff = 0;
}