Table of Contents
TIFFReadTile - read and decode a tile of data
from an open TIFF
file
#include <tiffio.h>
tsize_t TIFFReadTile(TIFF* tif, tdata_t buf, uint32 x, uint32 y, uint32
z, tsample_t sample)
Return the data for the tile containing
the specified coordinates. The data placed in buf are returned decompressed
and, typically, in the native byte- and bit-ordering, but are otherwise packed
(see further below). The buffer must be large enough to hold an entire tile
of data. Applications should call the routine TIFFTileSize to find out the
size (in bytes) of a tile buffer. The x and y parameters are always used
by TIFFReadTile. The z parameter is used if the image is deeper than 1 slice
(ImageDepth>1). The sample parameter is used only if data are organized in
separate planes (PlanarConfiguration=2).
The library attempts to hide
bit- and byte-ordering differences between the image and the native machine
by converting data to the native machine order. Bit reversal is done if
the FillOrder tag is opposite to the native machine bit order. 16- and 32-bit
samples are automatically byte-swapped if the file was written with a byte
order opposite to the native machine byte order,
TIFFReadTile
returns -1 if it detects an error; otherwise the number of bytes in the
decoded tile is returned.
All error messages are directed to
the TIFFError(3)
routine.
libtiff(3)
, TIFFCheckTile(3)
, TIFFComputeTile(3)
,
TIFFOpen(3)
, TIFFReadEncodedTile(3)
, TIFFReadRawTile(3)
Table of Contents