tiffreadtile(3tiff) [suse man page]

TIFFReadTile(3TIFF)													       TIFFReadTile(3TIFF)

NAME

       TIFFReadTile - read and decode a tile of data from an open TIFF file

SYNOPSIS

       #include <tiffio.h>

       tsize_t TIFFReadTile(TIFF *tif, tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t sample)

DESCRIPTION

       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).

NOTES

       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 automati-
       cally byte-swapped if the file was written with a byte order opposite to the native machine byte order,

RETURN VALUES

       TIFFReadTile returns -1 if it detects an error; otherwise the number of bytes in the decoded tile is returned.

DIAGNOSTICS

       All error messages are directed to the TIFFError(3TIFF) routine.

SEE ALSO

       TIFFCheckTile(3TIFF), TIFFComputeTile(3TIFF), TIFFOpen(3TIFF), TIFFReadEncodedTile(3TIFF), TIFFReadRawTile(3TIFF), libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/

libtiff 							 December 16, 1991					       TIFFReadTile(3TIFF)

TIFFTILE(3TIFF) 														   TIFFTILE(3TIFF)

NAME

       TIFFTileSize, TIFFTileRowSize, TIFFVTileSize, TIFFDefaultTileSize, TIFFComputeTile, TIFFCheckTile, TIFFNumberOfTiles - tile-related utility
       routines

SYNOPSIS

       #include <tiffio.h>

       void TIFFDefaultTileSize(TIFF *tif, uint32 *tw, uint32 *th)
       tsize_t TIFFTileSize(TIFF *tif)
       tsize_t TIFFTileRowSize(TIFF *tif)
       tsize_t TIFFVTileSize(TIFF *tif, uint32 nrows)
       ttile_t TIFFComputeTile(TIFF *tif, uint32 x, uint32 y, uint32 z, tsample_t sample)
       int TIFFCheckTile(TIFF *tif, uint32 x, uint32 y, uint32 z, tsample_t sample)
       ttile_t TIFFNumberOfTiles(TIFF *tif)

DESCRIPTION

       TIFFDefaultTileSize returns the pixel width and height of a reasonable-sized tile; suitable for setting up  the	TileWidth  and	TileLength
       tags.   If  the	tw  and  th  values  passed  in are non-zero, then they are adjusted to reflect any compression-specific requirements. The
       returned width and height are constrained to be a multiple of 16 pixels to conform with the TIFF specification.

       TIFFTileSize returns the equivalent size for a tile of data as it would be returned in a call to TIFFReadTile or as it would be expected in
       a call to TIFFWriteTile.

       TIFFVTileSize returns the number of bytes in a row-aligned tile with nrows of data.

       TIFFTileRowSize returns the number of bytes of a row of data in a tile.

       TIFFComputeTile	returns  the tile that contains the specified coordinates. A valid tile is always returned; out-of-range coordinate values
       are clamped to the bounds of the image. The x and y parameters are always used in calculating a tile. 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).

       TIFFCheckTile  returns  a non-zero value if the supplied coordinates are within the bounds of the image and zero otherwise. The x parameter
       is checked against the value of the ImageWidth tag. The y parameter is checked against the value of the ImageLength tag. The z parameter is
       checked	against  the  value  of  the ImageDepth tag (if defined). The sample parameter is checked against the value of the SamplesPerPixel
       parameter if the data are organized in separate planes.

       TIFFNumberOfTiles returns the number of tiles in the image.

DIAGNOSTICS

       None.

SEE ALSO

       TIFFReadEncodedTile(3TIFF),    TIFFReadRawTile(3TIFF),	 TIFFReadTile(3TIFF),	 TIFFWriteEncodedTile(3TIFF),	  TIFFWriteRawTile(3TIFF),
       TIFFWriteTile(3TIFF), libtiff(3TIFF)

       Libtiff library home page: http://www.remotesensing.org/libtiff/

libtiff 							 February 14, 1992						   TIFFTILE(3TIFF)