1TIFFReadTile(3TIFF) TIFFReadTile(3TIFF)
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6 TIFFReadTile - read and decode a tile of data from an open TIFF file
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9 #include <tiffio.h>
10 tsize_t TIFFReadTile(TIFF *tif, tdata_t buf, uint32 x, uint32 y, uint32
12 z, tsample_t sample)
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15 Return the data for the tile containing the specified coordinates. The
16 data placed in buf are returned decompressed and, typically, in the
17 native byte- and bit-ordering, but are otherwise packed (see further
18 below). The buffer must be large enough to hold an entire tile of data.
19 Applications should call the routine TIFFTileSize to find out the size
20 (in bytes) of a tile buffer. The x and y parameters are always used by
21 TIFFReadTile. The z parameter is used if the image is deeper than 1
22 slice (ImageDepth>1). The sample parameter is used only if data are
23 organized in separate planes (PlanarConfiguration=2).
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26 The library attempts to hide bit- and byte-ordering differences between
27 the image and the native machine by converting data to the native
28 machine order. Bit reversal is done if the FillOrder tag is opposite
29 to the native machine bit order. 16- and 32-bit samples are automati‐
30 cally byte-swapped if the file was written with a byte order opposite
31 to the native machine byte order,
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34 TIFFReadTile returns -1 if it detects an error; otherwise the number of
35 bytes in the decoded tile is returned.
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38 All error messages are directed to the TIFFError(3TIFF) routine.
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41 TIFFCheckTile(3TIFF), TIFFComputeTile(3TIFF), TIFFOpen(3TIFF), TIFF‐
42 ReadEncodedTile(3TIFF), TIFFReadRawTile(3TIFF), libtiff(3TIFF)
43 Libtiff library home page: http://www.simplesystems.org/libtiff/
45libtiff December 16, 1991 TIFFReadTile(3TIFF)