'\" te
.TH libtiff 3 "06 Apr 2004" "SunOS 5.11" "C Library Functions"
.SH "NAME"
libtiff \- introduction
to \fBlibtiff\fR, a library for reading and writing TIFF files
.SH "SYNOPSIS"
.sp
.nf
\f(CW#include <tiffio\&.h>

cc [ \fIflag\fR \&.\&.\&.]  -I/usr/sfw/include	 \fIfile\fR  [  \fIlibrary\fR  \&.\&.\&.	]
	-L/usr/sfw/lib -R/usr/sfw/lib -ltiff\fR
.fi
.sp
.SH "DESCRIPTION"
.PP
\fBlibtiff\fR is a library for reading and writing data
files encoded with the Tag Image File format, Revision 4\&.0 or later\&. The TIFF
file format is suitable for archiving multicolor and monochromatic image data\&.
.SH "EXTENDED DESCRIPTION"
.PP
The \fBlibtiff\fR library supports several compression
algorithms, as indicated by the Compression field, including:
.sp
.in +2
\(bu
.mk
.in +3
.rt
No compression (1)
.sp
.in -3
\(bu
.mk
.in +3
.rt
CCITT 1D Huffman compression (2)
.sp
.in -3
\(bu
.mk
.in +3
.rt
CCITT Group 3 Facsimile compression (3)
.sp
.in -3
\(bu
.mk
.in +3
.rt
CCITT Group 4 Facsimile compression (4)
.sp
.in -3
\(bu
.mk
.in +3
.rt
Lempel-Ziv & Welch compression (5)
.sp
.in -3
\(bu
.mk
.in +3
.rt
Baseline JPEG compression (7)
.sp
.in -3
\(bu
.mk
.in +3
.rt
Word-aligned 1D Huffman compression (32771)
.sp
.in -3
\(bu
.mk
.in +3
.rt
PackBits compression (32773)
.sp
.in -3
.in -2
.PP
In addition, several nonstandard compression algorithms are supported:
.sp
.in +2
\(bu
.mk
.in +3
.rt
4-bit compression algorithm used by the ThunderScan program
(32809) (decompression only)
.sp
.in -3
\(bu
.mk
.in +3
.rt
NeXT\&'s 2-bit compression algorithm (32766) (decompression
only)
.sp
.in -3
\(bu
.mk
.in +3
.rt
Experimental LZ-style algorithm known as Deflate (32946)
.sp
.in -3
\(bu
.mk
.in +3
.rt
Experimental CIE LogLuv compression scheme designed for images
with high dynamic range (32845 for LogL and 32845 for LogLuv)
.sp
.in -3
.in -2
.PP
Directory information may be in either little- or big-endian byte order\&.
Byte swapping is automatically done by the library\&.
.PP
Data bit ordering may be either Most Significant Bit (MSB) to Least
Significant Bit (LSB), or LSB to MSB\&.
.PP
The library does not support files in which the BitsPerSample, Compression,
MinSampleValue, or MaxSampleValue fields are defined differently on a per-sample
basis\&. In Revision 6\&.0, the Compression tag is not defined on a per-sample
basis, so this is immaterial\&.
.SS "Data Types"
.PP
The \fBlibtiff\fR library makes extensive use of C typedefs
to promote portability\&. Two sets of typedefs are used, one for communication
with clients of the library and one for internal data structures and parsing
of the TIFF format\&. The following typedefs are exposed to users either through
function definitions or through parameters passed through the \fBvarargs\fR interfaces\&.
.sp
.in +2
\(bu
.mk
.in +3
.rt
\fBtypedef unsigned short uint16;\fR \(em
16-bit unsigned integer
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef unsigned <thing> uint32;\fR \(em
32-bit unsigned integer
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef unsigned int ttag_t;\fR \(em directory
tag
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef uint16 tdir_t;\fR \(em directory
index
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef uint16 tsample_t;\fR \(em sample
number
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef uint32 tstrip_t;\fR \(em strip
number
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef uint32 ttile_t;\fR \(em tile number
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef int32 tsize_t;\fR \(em i/o size
in bytes
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef void* tdata_t;\fR \(em image data
ref
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef void* thandle_t;\fR \(em client
data handle
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBtypedef int32 toff_t;\fR \(em file offset
.sp
.in -3
.in -2
.PP
\fBtstrip_t\fR, \fBttile_t\fR, and \fBtsize_t\fR are limited to 32-bit quantities because they are stored
in 32-bit fields in the TIFF image\&. Similarly, \fBtsample_t\fR
is limited by the 16-bit field used to store the \fBSamplesPerPixel\fR tag\&. \fBtdir_t\fR constrains the maximum number of
IFDs that may appear in an image and may be an arbitrary size without penalty\&.
.PP
\fBttag_t\fR must be \fBint\fR, \fBunsigned int\fR, \fBpointer\fR, or \fBdouble\fR
because the library uses a \fBvarargs\fR interface and ANSI C
restricts the type of the parameter before an ellipsis to be a promoted type\&.
.PP
\fBtoff_t\fR is defined as \fBint32\fR because
TIFF file offsets are unsigned 32-bit quantities\&. A signed value is used because
some interfaces return -1 on error\&.
.PP
User-specified data references are passed as opaque handles and only
cast at the lowest layers where their type is presumed\&.
.SS "Library Routines"
.PP
The following routines are part of the \fBlibtiff\fR library\&.
Consult specific reference pages for details on their operation\&. The reference
page names listed below are for systems where the full function names cannot
be encoded in the file system\&. On most systems, the command \fBman \fIfunction-name\fR\fR will work\&.
.sp
.ne 2
.mk
\fB\fB_TIFFfree\fR\fR
.in +40n
.rt
Release
allocated memory\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fB_TIFFmalloc\fR\fR
.in +40n
.rt
Dynamically allocate memory\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fB_TIFFmemcmp\fR\fR
.in +40n
.rt
Compare allocated memory\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fB_TIFFmemcpy\fR\fR
.in +40n
.rt
Copy allocated memory to another memory location\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fB_TIFFmemset\fR\fR
.in +40n
.rt
Set allocated memory to known value\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fB_TIFFrealloc\fR\fR
.in +40n
.rt
Dynamically reallocate memory\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFbuffer\fR\fR
.in +40n
.rt
Specify
i/o buffer for reading or writing\&. See \fBTIFFbuffer\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFCheckTile\fR\fR
.in +40n
.rt
Every \fIx,y,z,sample\fR is within image\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFClientOpen\fR\fR
.in +40n
.rt
Open a file for reading or writing\&. See \fBTIFFOpen\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFClose\fR\fR
.in +40n
.rt
Close
an open file\&. See \fBTIFFClose\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFcodec\fR\fR
.in +40n
.rt
Work
with codecs\&. See \fBTIFFcodec\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFComputeStrip\fR\fR
.in +40n
.rt
Return strip containing \fIx,y,z,sample\fR\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFComputeTile\fR\fR
.in +40n
.rt
Return tile containing \fIy,sample\fR\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFCurrentDirectory\fR\fR
.in +40n
.rt
Return index of current directory\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFCurrentRow\fR\fR
.in +40n
.rt
Return index of current scanline\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFCurrentStrip\fR\fR
.in +40n
.rt
Return index of current strip\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFCurrentTile\fR\fR
.in +40n
.rt
Return index of current tile\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFDefaultStripSize\fR\fR
.in +40n
.rt
Return size of a strip\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFDefaultTileSize\fR\fR
.in +40n
.rt
Return size of a tile\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFError\fR\fR
.in +40n
.rt
Library
error handler\&. See \fBTIFFError\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFdOpen\fR\fR
.in +40n
.rt
Open
a file for reading or writing\&. See \fBTIFFOpen\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFileName\fR\fR
.in +40n
.rt
Return name of open file\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFileno\fR\fR
.in +40n
.rt
Return
open file descriptor\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFindCODEC\fR\fR
.in +40n
.rt
Find a codec\&. See \fBTIFFcodec\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFlush\fR\fR
.in +40n
.rt
Flush
all pending writes\&. See \fBTIFFFlush\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFFlushData\fR\fR
.in +40n
.rt
Flush pending data writes\&. See \fBTIFFFlush\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFGetBitRevTable\fR\fR
.in +40n
.rt
Return bit reversal table\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFGetField\fR\fR
.in +40n
.rt
Return tag value in current directory\&. See \fBTIFFGetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFGetFieldDefaulted\fR\fR
.in +40n
.rt
Return tag value in current directory\&. See \fBTIFFGetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFGetMode\fR\fR
.in +40n
.rt
Return open file mode\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFGetVersion\fR\fR
.in +40n
.rt
Return library version string\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFIsByteSwapped\fR\fR
.in +40n
.rt
Return true if image data is byte-swapped\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFIsMSB2LSB\fR\fR
.in +40n
.rt
Return true if image data is returned with bit 0 as the most significant bit\&.
See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFIsTiled\fR\fR
.in +40n
.rt
Return true if image data is tiled\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFIsUpSampled\fR\fR
.in +40n
.rt
Return true if image data is up-sampled\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFLastDirectory\fR\fR
.in +40n
.rt
Return a non-zero value if the current directory is the last directory
in the file\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFmemory\fR\fR
.in +40n
.rt
Manage
memory\&. See \fBTIFFmemory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFNumberOfStrips\fR\fR
.in +40n
.rt
Return number of strips in an image\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFNumberOfTiles\fR\fR
.in +40n
.rt
Return number of tiles in an image\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFOpen\fR\fR
.in +40n
.rt
Open
a file for reading or writing\&. See \fBTIFFOpen\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFPrintDirectory\fR\fR
.in +40n
.rt
Print description of the current directory\&. See \fBTIFFPrintDirectory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFquery\fR\fR
.in +40n
.rt
Return
information about image\&. See \fBTIFFquery\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRasterScanlineSize\fR\fR
.in +40n
.rt
Return size of a raster scanline\&. See \fBTIFFsize\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadBufferSetup\fR\fR
.in +40n
.rt
Specify i/o buffer for reading\&. See \fBTIFFbuffer\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadDirectory\fR\fR
.in +40n
.rt
Read the next directory\&. See \fBTIFFReadDirectory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadEncodedStrip\fR\fR
.in +40n
.rt
Read and decode a strip of data\&. See \fBTIFFReadEncodedStrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadEncodedTile\fR\fR
.in +40n
.rt
Read and decode a tile of data\&. See \fBTIFFReadEncodedTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadRawStrip\fR\fR
.in +40n
.rt
Read a raw strip of data\&. See \fBTIFFReadRawStrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadRawTile\fR\fR
.in +40n
.rt
Read a raw tile of data\&. See \fBTIFFReadRawTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadRGBAImage\fR\fR
.in +40n
.rt
Read an image into a fixed format raster\&. See \fBTIFFReadRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadRGBAStrip\fR\fR
.in +40n
.rt
Read an image strip into a fixed format raster\&. See \fBTIFFReadRGBAStrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadRGBATile\fR\fR
.in +40n
.rt
Read an image tile into a fixed format raster\&. See \fBTIFFReadRGBATile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadScanline\fR\fR
.in +40n
.rt
Read and decode a row of data\&. See \fBTIFFReadScanline\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReadTile\fR\fR
.in +40n
.rt
Read and decode a tile of data\&. See \fBTIFFReadTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRegisterCODEC\fR\fR
.in +40n
.rt
Register a codec\&. See \fBTIFFcodec\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFReverseBits\fR\fR
.in +40n
.rt
Reverse bits in an array of bytes\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRGBAImage\fR\fR
.in +40n
.rt
Read and decode an image into a raster\&. See \fBTIFFRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRGBAImageBegin\fR\fR
.in +40n
.rt
Set up decoder state for \fBTIFFRGBAImageGet\fR\&. See \fBTIFFRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRGBAImageEnd\fR\fR
.in +40n
.rt
Release \fBTIFFRGBAImage\fR decoder state\&. See \fBTIFFRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRGBAImageGet\fR\fR
.in +40n
.rt
Read and decode an image\&. See \fBTIFFRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFRGBAImageOK\fR\fR
.in +40n
.rt
Determine whether image is readable by \fBTIFFRGBAImageGet\fR\&.
See \fBTIFFRGBAImage\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFScanlineSize\fR\fR
.in +40n
.rt
Return size of a scanline\&. See \fBTIFFsize\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSetDirectory\fR\fR
.in +40n
.rt
Set the current directory\&. See \fBTIFFSetDirectory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSetSubDirectory\fR\fR
.in +40n
.rt
Set the current directory\&. See \fBTIFFSetDirectory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSetErrorHandler\fR\fR
.in +40n
.rt
Set error handler function\&. See \fBTIFFError\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSetField\fR\fR
.in +40n
.rt
Set tag value in the current directory\&. See \fBTIFFSetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSetWarningHandler\fR\fR
.in +40n
.rt
Set warning handler function\&. See \fBTIFFWarning\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFsize\fR\fR
.in +40n
.rt
Return
the size\&. See \fBTIFFsize\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFstrip\fR\fR
.in +40n
.rt
Work
with strips\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFStripSize\fR\fR
.in +40n
.rt
Return size of a strip\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFswab\fR\fR
.in +40n
.rt
Swap
bytes\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSwabShort\fR\fR
.in +40n
.rt
Swap bytes of short\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSwabLong\fR\fR
.in +40n
.rt
Swap bytes of long\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSwabArrayOfShort\fR\fR
.in +40n
.rt
Swap bytes of an array of shorts\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFSwabArrayOfLong\fR\fR
.in +40n
.rt
Swap bytes of an array of longs\&. See \fBTIFFswab\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFtile\fR\fR
.in +40n
.rt
Return
tile information\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFTileRowSize\fR\fR
.in +40n
.rt
Return size of a row in a tile\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFTileSize\fR\fR
.in +40n
.rt
Return size of a tile\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFUnregisterCODEC\fR\fR
.in +40n
.rt
Unregister a codec\&. See \fBTIFFcodec\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFVGetField\fR\fR
.in +40n
.rt
Return tag value in current directory\&. See \fBTIFFGetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFVGetFieldDefaulted\fR\fR
.in +40n
.rt
Return tag value in current directory\&. See \fBTIFFGetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFVSetField\fR\fR
.in +40n
.rt
Set tag value in current directory\&. See \fBTIFFSetField\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFVStripSize\fR\fR
.in +40n
.rt
Return size of a strip\&. See \fBTIFFstrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFVTileSize\fR\fR
.in +40n
.rt
Return size of a tile\&. See \fBTIFFtile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWarning\fR\fR
.in +40n
.rt
Library warning handler\&. See \fBTIFFWarning\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteBufferSetup\fR\fR
.in +40n
.rt
Specify i/o buffer for writing\&. See \fBTIFFbuffer\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteDirectory\fR\fR
.in +40n
.rt
Write the current directory\&. See \fBTIFFWriteDirectory\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteEncodedStrip\fR\fR
.in +40n
.rt
Compress and write a strip of data\&. See \fBTIFFWriteEncodedStrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteEncodedTile\fR\fR
.in +40n
.rt
Compress and write a tile of data\&. See \fBTIFFWriteEncodedTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteRawStrip\fR\fR
.in +40n
.rt
Write a raw strip of data\&. See \fBTIFFWriteRawStrip\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteRawTile\fR\fR
.in +40n
.rt
Write a raw tile of data\&. See \fBTIFFWriteRawTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteScanline\fR\fR
.in +40n
.rt
Write a scanline of data\&. See \fBTIFFWriteScanline\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.sp
.ne 2
.mk
\fB\fBTIFFWriteTile\fR\fR
.in +40n
.rt
Compress and write a tile of data\&. See \fBTIFFWriteTile\fR(3tiff)\&.
.sp
.sp 1
.in -40n
.SS "Tag Usage"
.PP
The table below lists the TIFF tags that are recognized and supported
by the \fBlibtiff\fR library\&. If no use is indicated in the table,
then the library reads and writes the tag, but does not use the tag internally\&.
Note that some tags are meaningful only when a particular compression scheme
is used\&. For example, \fBGroup3Options\fR is only useful if Compression
is set to \fBCCITT Group 3\fR encoding\&. Tags of this sort are
considered codec-specific tags and the library does not recognize them except
when the Compression tag has been previously set to the relevant compression
scheme\&.
.sp
.TS
tab() allbox;
lw(1.375000i)| lw(1.375000i)| lw(1.375000i)| lw(1.375000i).
TAG NAMEVALUER/WLIBRARY USE / NOTES
\fBArtist\fR315R/W
\fBBadFaxLines\fR326R/W
\fBBitsPerSample\fR258R/WLots\&.
\fBCellLength\fR265Parsed but ignored\&.
\fBCellWidth\fR264Parsed but ignored\&.
\fBCleanFaxData\fR327R/W
\fBColorMap\fR320R/W
\fBColorResponseUnit\fR300Parsed but ignored\&.
\fBCompression\fR259R/WChoosing codec\&.
\fBConsecutiveBadFaxLines\fR328R/W
\fBDataType\fR32996RObsoleted by \fBSampleFormat\fR tag\&.
\fBDateTime\fR306R/W
\fBDocumentName\fR269R/W
\fBDotRange\fR336R/W
\fBExtraSamples\fR338R/WLots\&.
\fBFaxRecvParams\fR34908R/W
\fBFaxSubAddress\fR34909R/W
\fBFaxRecvTime\fR34910R/W
\fBFillOrder\fR266R/WControl bit order\&.
\fBFreeByteCounts\fR289Parsed but ignored\&.
\fBFreeOffsets\fR288Parsed but ignored\&.
\fBGrayResponseCurve\fR291Parsed but ignored\&.
\fBGrayResponseUnit\fR290Parsed but ignored\&.
\fBGroup3Options\fR292R/WUsed
by Group 3 codec\&.
\fBGroup4Options\fR293R/W
\fBHostComputer\fR316R/W
\fBImageDepth\fR32997R/WTile/strip
calculations\&.
\fBImageDescription\fR270R/W
\fBImageLength\fR257R/WLots\&.
\fBImageWidth\fR256R/WLots\&.
\fBInkNames\fR333R/W
\fBInkSet\fR332R/W
\fBJPEGTables\fR347R/WUsed
by JPEG codec\&.
\fBMake\fR271R/W
\fBMatteing\fR32995RObsoleted
by \fBExtraSamples\fR tag\&.
\fBMaxSampleValue\fR281R/W
\fBMinSampleValue\fR280R/W
\fBModel\fR272R/W
\fBNewSubFileType\fR254R/WCalled \fBSubFileType\fR in spec\&.
\fBNumberOfInks\fR334R/W
\fBOrientation\fR274R/W
\fBPageName\fR285R/W
\fBPageNumber\fR297R/W
\fBPhotometricInterpretation\fR262R/WUsed
by Group 3 and JPEG codecs\&.
\fBPlanarConfiguration\fR284R/WData
i/o\&.
\fBPredictor\fR317R/WUsed
by LZW and Deflate codecs\&.
\fBPrimaryChromacities\fR319R/W
\fBReferenceBlackWhite\fR532R/W
\fBResolutionUnit\fR296R/WUsed
by Group 3 codec\&.
\fBRowsPerStrip\fR278R/WData
i/o\&.
\fBSampleFormat\fR339R/W
\fBSamplesPerPixel\fR277R/WLots\&.
\fBSMinSampleValue\fR340R/W
\fBSMaxSampleValue\fR341R/W
\fBSoftware\fR305R/W
\fBStoNits\fR37439R/W
\fBStripByteCounts\fR279R/WData
i/o\&.
\fBStripOffsets\fR273R/WData
i/o\&.
\fBSubFileType\fR255R/WCalled \fBOSubFileType\fR in spec\&.
\fBTargetPrinter\fR337R/W
\fBThresholding\fR263R/W
\fBTileByteCounts\fR324R/WData
i/o\&.
\fBTileDepth\fR32998R/WTile/strip
calculations\&.
\fBTileLength\fR323R/WData
i/o\&.
\fBTileOffsets\fR324R/WData
i/o\&.
\fBTileWidth\fR322R/WData
i/o\&.
\fBTransferFunction\fR301R/W
\fBWhitePoint\fR318R/W
\fBXPosition\fR286R/W
\fBXResolution\fR282R/W
\fBYCbCrCoefficients\fR529R/WUsed
by TIFFRGBAImage support\&.
\fBYCbCrPositioning\fR531R/WTile/strip
size calulcations\&.
\fBYCbCrSubsampling\fR530R/W
\fBYPosition\fR286R/W
\fBYResolution\fR283R/WUsed
by Group 3 codec\&.
.TE
.sp
.SS "Pseudo Tags"
.PP
In addition to the normal TIFF tags, the \fBlibtiff\fR
library supports a collection of tags whose values lie in a range outside
the valid range of TIFF tags\&. These tags are termed pseudo-tags and are used
to control various codec-specific functions within the library\&. The table
below summarizes the defined pseudo-tags\&.
.sp
.TS
tab() allbox;
lw(1.375000i)| lw(1.375000i)| lw(1.375000i)| lw(1.375000i).
TAG NAMECODECR/WLIBRARY USE / NOTES
\fBTIFFTAG_FAXMODE\fRG3R/WGeneral codec operation\&.
\fBTIFFTAG_FAXFILLFUNC\fRG3/G4R/WBitmap fill function\&.
\fBTIFFTAG_JPEGQUALITY\fRJPEGR/WCompression quality control\&.
\fBTIFFTAG_JPEGCOLORMODE\fRJPEGR/WControl colorspace conversions\&.
\fBTIFFTAG_JPEGTABLESMODE\fRJPEGR/WControl contents of \fBJPEGTables\fR tag\&.
\fBTIFFTAG_ZIPQUALITY\fRDeflateR/WCompression quality level\&.
\fBTIFFTAG_PIXARLOGDATAFMT\fRPixarLogR/WUser data format\&.
\fBTIFFTAG_PIXARLOGQUALITY\fRPixarLogR/WCompression quality level\&.
\fBTIFFTAG_SGILOGDATAFMT\fRSGILogR/WUser data format\&.
.TE
.sp
.SS "TIFFTAG_FAXMODE"
.PP
Controls the operation of the Group 3 codec\&. Possible values (independent
bits that can be combined by or\&'ing them together) are: 
.sp
.ne 2
.mk
\fB\fBFAXMODE_BYTEALIGN\fR\fR
.in +24n
.rt
Align each encoded row to an 8-bit boundary\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB\fBFAXMODE_CLASSIC\fR\fR
.in +24n
.rt
Enable old-style format in which the RTC is written at the end of the last
strip\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB\fBFAXMODE_NOEOL\fR\fR
.in +24n
.rt
Do not write EOL codes at the start of each row of data\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB\fBFAXMODE_NORTC\fR, also called \fBFAXMODE_CLASSF\fR\fR
.in +24n
.rt
Opposite of \fBFAXMODE_CLASSIC\fR\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB\fBFAXMODE_WORDALIGN\fR\fR
.in +24n
.rt
Align each encoded row to a 16-bit boundary\&.
.sp
.sp 1
.in -24n
.PP
The default value depends on the compression scheme\&.
This pseudo-tag is used by the various G3 and G4 codecs to share code\&.
.SS "TIFFTAG_FAXFILLFUNC"
.PP
Controls the function used to convert arrays of black and white runs
to packed bit arrays\&. This hook can be used to image decoded scanlines in
multi-bit depth rasters (for example, for display in colormap mode) or for
other purposes\&. The default value is a pointer to a builtin function that
images packed bilevel data\&.
.SS "TIFFTAG_IPTCNEWSPHOTO"
.PP
Contains image metadata per the IPTC newsphoto specification: Headline,
captioning, credit, and so on\&. Used by most wire services\&.
.SS "TIFFTAG_PHOTOSHOP"
.PP
Contains Photoshop captioning information and metadata\&. Photoshop uses
in parallel and redundantly alongside \fBIPTCNEWSPHOTO\fR information\&.
.SS "TIFFTAG_JPEGQUALITY"
.PP
Controls the compression quality level used in the baseline algorithm\&.
Note that quality levels are in the range 0-100 with a default value of 75\&.
.SS "TIFFTAG_JPEGCOLORMODE"
.PP
Controls whether or not conversion is done between RGB and YCbCr colorspaces\&.
Possible values are: \fBJPEGCOLORMODE_RAW\fR (do not convert),
and \fBJPEGCOLORMODE_RGB\fR (convert to/from RGB)\&. The default
value is \fBJPEGCOLORMODE_RAW\fR\&.
.SS "TIFFTAG_JPEGTABLESMODE"
.PP
Controls the information written in the \fBJPEGTables\fR
tag\&. Possible values (independent bits that can be combined by or\&'ing them
together) are: \fBJPEGTABLESMODE_QUANT\fR (include quantization
tables), and \fBJPEGTABLESMODE_HUFF\fR (include Huffman encoding
tables)\&.
.SS "TIFFTAG_ZIPQUALITY"
.PP
Controls the compression technique used by the Deflate codec\&. Quality
levels are in the range 1-9 with larger numbers yielding better compression
at the cost of more computation\&. The default quality level is 6 which yields
a good time-space tradeoff\&.
.SS "TIFFTAG_PIXARLOGDATAFMT"
.PP
Controls the format of user data passed to the PixarLog codec when encoding
and passed from the PixarLog codec when decoding\&. Possible values are:
.sp
.in +2
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_8BIT\fR for 8-bit unsigned
pixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_8BITABGR\fR for 8-bit unsigned
ABGR-orderedpixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_11BITLOG\fR for 11-bit log-encoded
raw data
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_12BITPICIO\fR for 12-bit PICIO-compatible
data
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_16BIT\fR for 16-bit signed
samples
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBPIXARLOGDATAFMT_FLOAT\fR for 32-bit IEEE floating
point samples
.sp
.in -3
.in -2
.SS "TIFFTAG_PIXARLOGQUALITY"
.PP
Controls the compression technique used by the PixarLog codec\&. This
value is treated identically to \fBTIFFTAG_ZIPQUALITY\fR\&.
.SS "TIFFTAG_SGILOGDATAFMT"
.PP
Controls the format of client data passed to the SGILog codec when encoding
and passed from the SGILog codec when decoding\&. Possible values are:
.sp
.in +2
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_FLTXYZ\fR for converting between
LogLuv and 32-bit IEEE floating valued XYZ pixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_16BITLUV\fR for 16-bit encoded
Luv pixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_32BITRAW\fR and \fBSGILOGDATAFMT_24BITRAW\fR for no conversion of data
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_8BITRGB\fR for returning 8-bit
RGB data (valid only when decoding LogLuv-encoded data)
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_FLTY\fR for converting between
LogL and 32-bit IEEE floating valued Y pixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_16BITL\fR for 16-bit encoded
L pixels
.sp
.in -3
\(bu
.mk
.in +3
.rt
\fBSGILOGDATAFMT_8BITGRY\fR for returning 8-bit
greyscale data (valid only when decoding LogL-encoded data)
.sp
.in -3
.in -2
.SS "Diagnostics"
.PP
All error messages are directed through the \fBTIFFError\fR
routine\&. By default, messages are directed to \fBstderr\fR in
the form: \fB\fImodule\fR: \fImessage\fR\\n\fR\&. Warning messages are likewise directed through
the TIFFWarning routine\&.
.SH "ATTRIBUTES"
.PP
See \fBattributes\fR(5)
for descriptions of the following attributes:
.sp
.TS
tab() allbox;
cw(2.750000i)| cw(2.750000i)
lw(2.750000i)| lw(2.750000i).
ATTRIBUTE TYPEATTRIBUTE VALUE
Availabilityimage/library/libtiff
Interface stabilityUncommitted
.TE
.sp
.SH "SEE ALSO"
.PP
\fBfax2tiff\fR(1),
\fBgif2tiff\fR(1),
\fBpal2rgb\fR(1),
\fBppm2tiff\fR(1),
\fBras2tiff\fR(1),
\fBrgb2ycbcr\fR(1),
\fBsgi2tiff\fR(1),
\fBtiff2bw\fR(1),
\fBtiffcmp\fR(1),
\fBtiffcp\fR(1),
\fBtiffdither\fR(1),
\fBtiffdump\fR(1),
\fBtiffgt\fR(1),
\fBtiffinfo\fR(1),
\fBtiffmedian\fR(1),
\fBtiffsplit\fR(1),
\fBtiffsv\fR(1),
\fBattributes\fR(5)
.PP
\fITag Image File Format Specification\fR Revision
6\&.0, an Aldus Technical Memorandum\&.
.PP
\fIThe Spirit of TIFF Class F\fR an appendix to the
TIFF 5\&.0 specification prepared by Cygnet Technologies\&.
.SH "NOTES"
.PP
The \fBlibtiff\fR library does not support multisample
images where some samples have different bits/sample\&.
.PP
The library does not support random access to compressed data that is
organized with more than one row per tile or strip\&. The library discards unknown
tags\&. The library should do more validity checking of a directory\&'s contents\&.
.PP
This man page was originally written by Sam Leffler\&. Updated by Breda
McColgan, Sun Microsystems Inc\&., 2004\&.
...\" created by instant / solbook-to-man, Thu 20 Mar 2014, 02:30
...\" LSARC 2003/085 libtiff, libjpeg, and libpng