libtiff/man/TIFFstrip.3tiff

.\" $Id: TIFFstrip.3tiff,v 1.3 2016-09-25 20:05:51 bfriesen Exp $
.\"
.\" Copyright (c) 1992-1997 Sam Leffler
.\" Copyright (c) 1992-1997 Silicon Graphics, Inc.
.\"
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.if n .po 0
.TH TIFFSTRIP 3TIFF "October 15, 1995" "libtiff"
.SH NAME
TIFFDefaultStripSize, TIFFStripSize, TIFFVStripSize, TIFFRawStripSize,
TIFFComputeStrip, TIFFNumberOfStrips \- strip-related utility routines
.SH SYNOPSIS
.B "#include <tiffio.h>"
.sp
.BI "uint32 TIFFDefaultStripSize(TIFF *" tif ", uint32 " estimate ")"
.br
.BI "tsize_t TIFFStripSize(TIFF *" tif ")"
.br
.BI "tsize_t TIFFVStripSize(TIFF *" tif ", uint32 " nrows ")"
.br
.BI "tsize_t TIFFRawStripSize(TIFF *" tif ", tstrip_t " strip ")"
.br
.BI "tstrip_t TIFFComputeStrip(TIFF *" tif ", uint32 " row ", tsample_t " sample ")"
.br
.BI "tstrip_t TIFFNumberOfStrips(TIFF *" tif ")"
.SH DESCRIPTION
.I TIFFDefaultStripSize
returns the number of rows for a reasonable-sized strip according to the
current settings of the
.IR ImageWidth ,
.IR BitsPerSample ,
.IR SamplesPerPixel ,
tags and any compression-specific requirements. If the
.I estimate
parameter, if non-zero, then it is taken as an estimate of the desired strip
size and adjusted according to any compression-specific requirements. The
value returned by this function is typically used to define the
.I RowsPerStrip
tag. In lieu of any unusual requirements
.I TIFFDefaultStripSize
tries to create strips that have approximately
8 kilobytes of uncompressed data.
.PP
.IR TIFFStripSize
returns the equivalent size for a strip of data as it would be returned in a
call to
.IR TIFFReadEncodedStrip
or as it would be expected in a call to
.IR TIFFWriteEncodedStrip .
.PP
.I TIFFVStripSize
returns the number of bytes in a strip with
.I nrows
rows of data.
.PP
.I TIFFRawStripSize
returns the number of bytes in a raw strip (i.e. not decoded).
.PP
.IR TIFFComputeStrip
returns the strip that contains the specified coordinates. A valid strip is
always returned; out-of-range coordinate values are clamped to the bounds of
the image. The
.I row
parameter is always used in calculating a strip. The
.I sample
parameter is used only if data are organized in separate planes (\c
.IR PlanarConfiguration =2).
.PP
.IR TIFFNumberOfStrips
returns the number of strips in the image.
.SH DIAGNOSTICS
None.
.SH "SEE ALSO"
.BR TIFFReadEncodedStrip (3TIFF),
.BR TIFFReadRawStrip (3TIFF),
.BR TIFFWriteEncodedStrip (3TIFF),
.BR TIFFWriteRawStrip (3TIFF),
.BR libtiff (3TIFF),
.PP
Libtiff library home page:
.BR http://www.simplesystems.org/libtiff/