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authorJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
commitc0b89ac5bfb90835ef01573267020e42d4fe070c (patch)
tree733c16852d964d84b7565af4bdaff0bcca901b88 /tiff/man/TIFFReadRGBAStrip.3tiff
parent094535c010320967639e8e86f974d878e80baa72 (diff)
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-.\" $Id: TIFFReadRGBAStrip.3tiff,v 1.3 2005/11/02 11:07:18 dron Exp $
-.\"
-.\" Copyright (c) 1991-1997 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
-.\" 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 TIFFReadRGBAStrip 3TIFF "December 10, 1998" "libtiff"
-.SH NAME
-TIFFReadRGBAStrip \- read and decode an image strip into a fixed-format raster
-.SH SYNOPSIS
-.B "#include <tiffio.h>"
-.sp
-.B "#define TIFFGetR(abgr) ((abgr) & 0xff)"
-.br
-.B "#define TIFFGetG(abgr) (((abgr) >> 8) & 0xff)"
-.br
-.B "#define TIFFGetB(abgr) (((abgr) >> 16) & 0xff)"
-.br
-.B "#define TIFFGetA(abgr) (((abgr) >> 24) & 0xff)"
-.sp
-.BI "int TIFFReadRGBAStrip(TIFF *" tif ", uint32 " row ", uint32 *" raster ")"
-.SH DESCRIPTION
-.IR TIFFReadRGBAStrip
-reads a single strip of a strip-based image into memory, storing the result in
-the user supplied RGBA
-.IR raster .
-The raster is assumed to be an array of width times rowsperstrip 32-bit
-entries, where width is the width of the image (TIFFTAG_IMAGEWIDTH) and
-rowsperstrip is the maximum lines in a strip (TIFFTAG_ROWSPERSTRIP).
-
-.PP
-The
-.IR row
-value should be the row of the first row in the strip (strip * rowsperstrip,
-zero based).
-
-.PP
-Note that the raster is assume to be organized such that the pixel at location
-(\fIx\fP,\fIy\fP) is \fIraster\fP[\fIy\fP*\fIwidth\fP+\fIx\fP]; with the
-raster origin in the
-.I lower-left hand corner
-of the strip. That is bottom to top organization. When reading a partial last
-strip in the file the last line of the image will begin at the beginning of
-the buffer.
-
-.PP
-Raster pixels are 8-bit packed red, green, blue, alpha samples. The macros
-.IR TIFFGetR ,
-.IR TIFFGetG ,
-.IR TIFFGetB ,
-and
-.I TIFFGetA
-should be used to access individual samples. Images without Associated Alpha
-matting information have a constant Alpha of 1.0 (255).
-.PP
-See the
-.IR TIFFRGBAImage (3TIFF)
-page for more details on how various image types are converted to RGBA values.
-.SH NOTES
-Samples must be either 1, 2, 4, 8, or 16 bits. Colorimetric samples/pixel must
-be either 1, 3, or 4 (i.e.
-.I SamplesPerPixel
-minus
-.IR ExtraSamples ).
-.PP
-Palette image colormaps that appear to be incorrectly written as 8-bit values
-are automatically scaled to 16-bits.
-.PP
-.I TIFFReadRGBAStrip
-is just a wrapper around the more general
-.IR TIFFRGBAImage (3TIFF)
-facilities. It's main advantage over the similar
-.IR TIFFReadRGBAImage()
-function is that for large images a single buffer capable of holding the whole
-image doesn't need to be allocated, only enough for one strip. The
-.IR TIFFReadRGBATile()
-function does a similar operation for tiled images.
-.SH "RETURN VALUES"
-1 is returned if the image was successfully read and converted.
-Otherwise, 0 is returned if an error was encountered.
-.SH DIAGNOSTICS
-All error messages are directed to the
-.IR TIFFError (3TIFF)
-routine.
-.PP
-.BR "Sorry, can not handle %d-bit pictures" .
-The image had
-.I BitsPerSample
-other than 1, 2, 4, 8, or 16.
-.PP
-.BR "Sorry, can not handle %d-channel images" .
-The image had
-.I SamplesPerPixel
-other than 1, 3, or 4.
-.PP
-\fBMissing needed "PhotometricInterpretation" tag\fP.
-The image did not have a tag that describes how to display the data.
-.PP
-\fBNo "PhotometricInterpretation" tag, assuming RGB\fP.
-The image was missing a tag that describes how to display it, but because it
-has 3 or 4 samples/pixel, it is assumed to be
-.SM RGB.
-.PP
-\fBNo "PhotometricInterpretation" tag, assuming min-is-black\fP. The image was
-missing a tag that describes how to display it, but because it has 1
-sample/pixel, it is assumed to be a grayscale or bilevel image.
-.PP
-.BR "No space for photometric conversion table" .
-There was insufficient memory for a table used to convert image samples to
-8-bit
-.SM RGB.
-.PP
-\fBMissing required "Colormap" tag\fP.
-A Palette image did not have a required
-.I Colormap
-tag.
-.PP
-.BR "No space for tile buffer" .
-There was insufficient memory to allocate an i/o buffer.
-.PP
-.BR "No space for strip buffer" .
-There was insufficient memory to allocate an i/o buffer.
-.PP
-.BR "Can not handle format" .
-The image has a format (combination of
-.IR BitsPerSample ,
-.IR SamplesPerPixel ,
-and
-.IR PhotometricInterpretation )
-that
-.I TIFFReadRGBAImage
-can not handle.
-.PP
-.BR "No space for B&W mapping table" .
-There was insufficient memory to allocate a table used to map grayscale data
-to
-.SM RGB.
-.PP
-.BR "No space for Palette mapping table" .
-There was insufficient memory to allocate a table used to map data to 8-bit
-.SM RGB.
-.SH "SEE ALSO"
-.BR TIFFOpen (3TIFF),
-.BR TIFFRGBAImage (3TIFF),
-.BR TIFFReadRGBAImage (3TIFF),
-.BR TIFFReadRGBATile (3TIFF),
-.BR libtiff (3TIFF)
-.PP
-Libtiff library home page:
-.BR http://www.remotesensing.org/libtiff/
-