.\" $Id: TIFFtile.3tiff,v 1.3 2016-09-25 20:05:51 bfriesen Exp $
.\"
.\" Copyright (c) 1988-1997 Sam Leffler
.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
.\"
.\" Permission to use, copy, modify, distribute, and sell this software and 
.\" its documentation for any purpose is hereby granted without fee, provided
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.\"
.if n .po 0
.TH TIFFTILE 3TIFF "February 14, 1992" "libtiff"
.SH NAME
TIFFTileSize, TIFFTileRowSize, TIFFVTileSize, TIFFDefaultTileSize,
TIFFComputeTile, TIFFCheckTile, TIFFNumberOfTiles \- tile-related utility
routines
.SH SYNOPSIS
.B "#include <tiffio.h>"
.sp
.BI "void TIFFDefaultTileSize(TIFF *" tif ", uint32 *" tw ", uint32 *" th ")"
.br
.BI "tsize_t TIFFTileSize(TIFF *" tif ")"
.br
.BI "tsize_t TIFFTileRowSize(TIFF *" tif ")"
.br
.BI "tsize_t TIFFVTileSize(TIFF *" tif ", uint32 " nrows ")"
.br
.BI "ttile_t TIFFComputeTile(TIFF *" tif ", uint32 " x ", uint32 " y ", uint32 " z ", tsample_t " sample ")"
.br
.BI "int TIFFCheckTile(TIFF *" tif ", uint32 " x ", uint32 " y ", uint32 " z ", tsample_t " sample ")"
.br
.BI "ttile_t TIFFNumberOfTiles(TIFF *" tif ")"
.br
.SH DESCRIPTION
.I TIFFDefaultTileSize
returns the pixel width and height of a reasonable-sized tile; suitable for
setting up the
.I TileWidth
and
.I TileLength
tags.
If the
.I tw
and
.I 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 
.SM TIFF
specification.
.PP
.I TIFFTileSize
returns the equivalent size for a tile of data as it would be returned in a
call to
.I TIFFReadTile
or as it would be expected in a call to
.IR TIFFWriteTile .
.PP
.I TIFFVTileSize
returns the number of bytes in a row-aligned tile with
.I nrows
of data.
.PP
.I TIFFTileRowSize
returns the number of bytes of a row of data in a tile.
.PP
.IR 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
.I x
and
.I y
parameters are always used in calculating a tile. The
.I z
parameter is used if the image is deeper than 1 slice (\c
.IR ImageDepth >1).
The
.I sample
parameter is used only if data are organized in separate planes (\c
.IR PlanarConfiguration =2).
.PP
.IR TIFFCheckTile
returns a non-zero value if the supplied coordinates are within the bounds of
the image and zero otherwise. The
.I x
parameter is checked against the value of the
.I ImageWidth
tag. The
.I y
parameter is checked against the value of the
.I ImageLength
tag. The
.I z
parameter is checked against the value of the
.I ImageDepth
tag (if defined). The
.I sample
parameter is checked against the value of the
.I SamplesPerPixel
parameter if the data are organized in separate planes.
.PP
.IR TIFFNumberOfTiles
returns the number of tiles in the image.
.SH DIAGNOSTICS
None.
.SH "SEE ALSO"
.BR TIFFReadEncodedTile (3TIFF),
.BR TIFFReadRawTile (3TIFF),
.BR TIFFReadTile (3TIFF),
.BR TIFFWriteEncodedTile (3TIFF),
.BR TIFFWriteRawTile (3TIFF),
.BR TIFFWriteTile (3TIFF),
.BR libtiff (3TIFF)
.PP
Libtiff library home page:
.BR http://www.simplesystems.org/libtiff/