/*
* Read and decompress a tile of data. The
* tile is selected by the (x,y,z,s) coordinates.
*/
tmsize_t
TIFFReadTile(TIFF* tif, void* buf, uint32 x, uint32 y, uint32 z, uint16 s)
{
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
return ((tmsize_t)(-1));
return (TIFFReadEncodedTile(tif,
TIFFComputeTile(tif, x, y, z, s), buf, (tmsize_t)(-1)));
}
/*
* Read and decompress a tile of data. The
* tile is selected by the (x,y,z,s) coordinates.
*/
tsize_t
TIFFReadTile(TIFF* tif,
tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t s)
{
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
return (-1);
return (TIFFReadEncodedTile(tif,
TIFFComputeTile(tif, x, y, z, s), buf, (tsize_t) -1));
}
/* Variant of TIFFReadTile() 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
_TIFFReadTileAndAllocBuffer(TIFF* tif,
void **buf, tmsize_t bufsizetoalloc,
uint32 x, uint32 y, uint32 z, uint16 s)
{
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
return ((tmsize_t)(-1));
return (_TIFFReadEncodedTileAndAllocBuffer(tif,
TIFFComputeTile(tif, x, y, z, s),
buf, bufsizetoalloc,
(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 x, uint32 y, uint32 z, uint16 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)));
}
