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- .\"
- .\" Copyright (c) 1995 Sam Leffler
- .\" Copyright (c) 1995 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
- .\" that (i) the above copyright notices and this permission notice appear in
- .\" all copies of the software and related documentation, and (ii) the names of
- .\" Sam Leffler and Silicon Graphics may not be used in any advertising or
- .\" publicity relating to the software without the specific, prior written
- .\" permission of Sam Leffler and Silicon Graphics.
- .\"
- .\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- .\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- .\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- .\"
- .\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- .\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- .\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- .\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- .\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- .\" OF THIS SOFTWARE.
- .\"
- .if n .po 0
- .TH CODEC 3TIFF "October 29, 2004" "libtiff"
- .SH NAME
- TIFFFindCODEC, TIFFRegisterCODEC, TIFFUnRegisterCODEC, TIFFIsCODECConfigured
- \- codec-related utility routines
- .SH SYNOPSIS
- .B "#include <tiffio.h>"
- .sp
- .BI "const TIFFCodec* TIFFFindCODEC(uint16_t " scheme ");"
- .br
- .BI "TIFFCodec* TIFFRegisterCODEC(uint16_t " scheme ", const char *" method ", TIFFInitMethod " init ");"
- .br
- .BI "void TIFFUnRegisterCODEC(TIFFCodec *" codec ");"
- .br
- .BI "int TIFFIsCODECConfigured(uint16_t " scheme ");"
- .SH DESCRIPTION
- .I libtiff
- supports a variety of compression schemes implemented by software
- .IR codecs .
- Each codec adheres to a modular interface that provides for
- the decoding and encoding of image data; as well as some other
- methods for initialization, setup, cleanup, and the control
- of default strip and tile sizes.
- Codecs are identified by the associated value of the
- .SM TIFF
- .I Compression
- tag; e.g. 5 for
- .SM LZW
- compression.
- .PP
- The
- .I TIFFRegisterCODEC
- routine can be used to
- augment or override the set of codecs available to an application.
- If the specified
- .I scheme
- already has a registered codec then it is
- .I overridden
- and any images with data encoded with this
- compression scheme will be decoded using the supplied codec.
- .PP
- .I TIFFIsCODECConfigured
- returns 1 if the codec is configured and working. Otherwise 0 will be returned.
- .SH DIAGNOSTICS
- .BR "No space to register compression scheme %s" .
- .I TIFFRegisterCODEC
- was unable to allocate memory for the data structures needed
- to register a codec.
- .PP
- .BR "Cannot remove compression scheme %s; not registered" .
- .I TIFFUnRegisterCODEC
- did not locate the specified codec in the table of registered
- compression schemes.
- .SH "SEE ALSO"
- .BR libtiff (3TIFF)
- .PP
- Libtiff library home page:
- .BR http://www.simplesystems.org/libtiff/
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