TIFFComputeTile

TIFFTILE(3T)							 TIFFTILE(3T)



NAME
       TIFFTileSize,   TIFFTileRowSize,	 TIFFVTileSize,	 TIFFDefaultTileSize,
       TIFFComputeTile, TIFFCheckTile, TIFFNumberOfTiles - tile-related util-
       ity 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 reason-
       able-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 pix-
       els 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  coordi-
       nates.	A valid tile is always returned; out-of-range coordinate val-
       ues 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 (PlanarConfigura-
       tion=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
       libtiff(3T), TIFFReadEncodedTile(3T),  TIFFReadRawTile(3T),  TIFFRead-
       Tile(3T),	TIFFWriteEncodedTile(3T),	TIFFWriteRawTile(3T),
       TIFFWriteTile(3T)



			      February 14, 1992			 TIFFTILE(3T)