TIFFREADENCODEDTILE(3tiff) LibTIFF TIFFREADENCODEDTILE(3tiff)
NAME
TIFFReadEncodedTile - read and decode a tile of data from an open TIFF
file
SYNOPSIS
#include <tiffio.h>
TIFFReadEncodedTile(3) *tif, ttile_t tile, tdata_t buf, tsize_t
size)
DESCRIPTION
Read the specified tile of data and place up to size bytes of
decompressed information in the (user supplied) data buffer.
NOTES
The value of tile is a "raw tile number". That is, the caller must take
into account whether or not the data are organized in separate planes
(PlanarConfiguration = 2). TIFFComputeTile() automatically does this
when converting an (x,y,z,sample) coordinate quadruple to a tile
number. To read a full tile of data the data buffer should be at least
as large as the value returned by TIFFTileSize().
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.
RETURN VALUES
The actual number of bytes of data that were placed in buf is returned;
TIFFReadEncodedTile() returns -1 if an error was encountered.
DIAGNOSTICS
All error messages are directed to the TIFFErrorExtR() routine.
SEE ALSO
TIFFOpen (3tiff), TIFFReadRawTile (3tiff), TIFFReadTile (3tiff),
TIFFReadEncodedStrip (3tiff), libtiff (3tiff)
AUTHOR
LibTIFF contributors
COPYRIGHT
1988-2022, LibTIFF contributors
4.7 September 11, 2024 TIFFREADENCODEDTILE(3tiff)
tiff 4.7.0 - Generated Thu Oct 3 14:29:22 CDT 2024