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TIFFReadEncodedStrip - read and decode a strip
of data from an open TIFF
file
#include <tiffio.h>
tsize_t TIFFReadEncodedStrip(TIFF
*tif, tstrip_t strip, tdata_t buf, tsize_t size)
Read the specified
strip of data and place up to size bytes of decompressed information in
the (user supplied) data buffer.
The value of strip is a ‘‘raw strip
number.’’ That is, the caller must take into account whether or not the data
are organized in separate planes (PlanarConfiguration=2). To read a full
strip of data the data buffer should typically be at least as large as
the number returned by TIFFStripSize(3TIFF)
. If the -1 passed in size parameter,
the whole strip will be read. You should be sure you have enough space allocated
for the buffer.
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,
The actual number of bytes of data that were placed
in buf is returned; TIFFReadEncodedStrip returns -1 if an error was encountered.
All error messages are directed to the TIFFError(3TIFF)
routine.
TIFFOpen(3TIFF)
, TIFFReadRawStrip(3TIFF)
, TIFFReadScanline(3TIFF)
,
libtiff(3TIFF)
Libtiff library home page: http://www.remotesensing.org/libtiff/
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