/*
* Read a tile of data and decompress the specified
* amount into the user-supplied buffer.
*/
tsize_t
TIFFReadEncodedTile(TIFF* tif, ttile_t tile, tdata_t buf, tsize_t size)
{
TIFFDirectory *td = &tif->tif_dir;
tsize_t tilesize = tif->tif_tilesize;
if (!TIFFCheckRead(tif, 1))
return (-1);
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"%ld: Tile out of range, max %ld",
(long) tile, (unsigned long) td->td_nstrips);
return (-1);
}
if (size == (tsize_t) -1)
size = tilesize;
else if (size > tilesize)
size = tilesize;
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
(tidata_t) buf, size, (tsample_t)(tile/td->td_stripsperimage))) {
(*tif->tif_postdecode)(tif, (tidata_t) buf, size);
return (size);
} else
return (-1);
}
/*
* Read a tile of data and decompress the specified
* amount into the user-supplied buffer.
*/
tmsize_t
TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadEncodedTile";
TIFFDirectory *td = &tif->tif_dir;
tmsize_t tilesize = tif->tif_tilesize;
if (!TIFFCheckRead(tif, 1))
return ((tmsize_t)(-1));
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Tile out of range, max %lu",
(unsigned long) tile, (unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
if (size == (tmsize_t)(-1))
size = tilesize;
else if (size > tilesize)
size = tilesize;
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
(uint8*) buf, size, (uint16)(tile/td->td_stripsperimage))) {
(*tif->tif_postdecode)(tif, (uint8*) buf, size);
return (size);
} else
return ((tmsize_t)(-1));
}
/* Variant of TIFFReadEncodedTile() that does
* * if *buf == NULL, *buf = _TIFFmalloc(bufsizetoalloc) only after TIFFFillTile() has
* succeeded. This avoid excessive memory allocation in case of truncated
* file.
* * calls regular TIFFReadEncodedTile() if *buf != NULL
*/
tmsize_t
_TIFFReadEncodedTileAndAllocBuffer(TIFF* tif, uint32 tile,
void **buf, tmsize_t bufsizetoalloc,
tmsize_t size_to_read)
{
static const char module[] = "_TIFFReadEncodedTileAndAllocBuffer";
TIFFDirectory *td = &tif->tif_dir;
tmsize_t tilesize = tif->tif_tilesize;
if( *buf != NULL )
{
return TIFFReadEncodedTile(tif, tile, *buf, size_to_read);
}
if (!TIFFCheckRead(tif, 1))
return ((tmsize_t)(-1));
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Tile out of range, max %lu",
(unsigned long) tile, (unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
if (!TIFFFillTile(tif,tile))
return((tmsize_t)(-1));
*buf = _TIFFmalloc(bufsizetoalloc);
if (*buf == NULL) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif),
"No space for tile buffer");
return((tmsize_t)(-1));
}
_TIFFmemset(*buf, 0, bufsizetoalloc);
if (size_to_read == (tmsize_t)(-1))
size_to_read = tilesize;
else if (size_to_read > tilesize)
size_to_read = tilesize;
if( (*tif->tif_decodetile)(tif,
(uint8*) *buf, size_to_read, (uint16)(tile/td->td_stripsperimage))) {
(*tif->tif_postdecode)(tif, (uint8*) *buf, size_to_read);
return (size_to_read);
} else
return ((tmsize_t)(-1));
}
/*
* Read a tile of data and decompress the specified
* amount into the user-supplied buffer.
*/
tmsize_t
TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadEncodedTile";
TIFFDirectory *td = &tif->tif_dir;
tmsize_t tilesize = tif->tif_tilesize;
if (!TIFFCheckRead(tif, 1))
return ((tmsize_t)(-1));
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Tile out of range, max %lu",
(unsigned long) tile, (unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
/* shortcut to avoid an extra memcpy() */
if( td->td_compression == COMPRESSION_NONE &&
size!=(tmsize_t)(-1) && size >= tilesize &&
!isMapped(tif) &&
((tif->tif_flags&TIFF_NOREADRAW)==0) )
{
if (TIFFReadRawTile1(tif, tile, buf, tilesize, module) != tilesize)
return ((tmsize_t)(-1));
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(buf,tilesize);
(*tif->tif_postdecode)(tif,buf,tilesize);
return (tilesize);
}
if (size == (tmsize_t)(-1))
size = tilesize;
else if (size > tilesize)
size = tilesize;
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
(uint8*) buf, size, (uint16)(tile/td->td_stripsperimage))) {
(*tif->tif_postdecode)(tif, (uint8*) buf, size);
return (size);
} else
return ((tmsize_t)(-1));
}