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| author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2015-11-06 05:38:49 +0100 |
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| committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2015-11-06 05:38:49 +0100 |
| commit | 9491825ddff7a294d1f49061bae7044e426aeb2e (patch) | |
| tree | 06e651099f87140ec534ae47fb8ce1ac6ec7976d /tiff/html/man/TIFFOpen.3tiff.html | |
| parent | fa756339d4204bff7f2820067f58214d32780d17 (diff) | |
Imported Upstream version 1.8.3
Diffstat (limited to 'tiff/html/man/TIFFOpen.3tiff.html')
| -rwxr-xr-x | tiff/html/man/TIFFOpen.3tiff.html | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/tiff/html/man/TIFFOpen.3tiff.html b/tiff/html/man/TIFFOpen.3tiff.html new file mode 100755 index 0000000..2379121 --- /dev/null +++ b/tiff/html/man/TIFFOpen.3tiff.html @@ -0,0 +1,421 @@ +<!-- Creator : groff version 1.18.1 --> +<!-- CreationDate: Sat Feb 24 18:37:16 2007 --> +<html> +<head> +<meta name="generator" content="groff -Thtml, see www.gnu.org"> +<meta name="Content-Style" content="text/css"> +<title>TIFFOpen</title> +</head> +<body> + +<h1 align=center>TIFFOpen</h1> +<a href="#NAME">NAME</a><br> +<a href="#SYNOPSIS">SYNOPSIS</a><br> +<a href="#DESCRIPTION">DESCRIPTION</a><br> +<a href="#OPTIONS">OPTIONS</a><br> +<a href="#BYTE ORDER">BYTE ORDER</a><br> +<a href="#RETURN VALUES">RETURN VALUES</a><br> +<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br> +<a href="#SEE ALSO">SEE ALSO</a><br> + +<hr> +<a name="NAME"></a> +<h2>NAME</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p>TIFFOpen, TIFFFdOpen, TIFFClientOpen − open a +<small>TIFF</small> file for reading or writing</p> +</td> +</table> +<a name="SYNOPSIS"></a> +<h2>SYNOPSIS</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p><b>#include <tiffio.h></b></p> +<!-- INDENTATION --> +<p><b>TIFF* TIFFOpen(const char *</b><i>filename</i><b>, +const char *</b><i>mode</i><b>)<br> +TIFF* TIFFFdOpen(const int</b> <i>fd</i><b>, const char +*</b><i>filename</i><b>, const char +*</b><i>mode</i><b>)</b></p> +<!-- INDENTATION --> +<p><b>typedef tsize_t (*TIFFReadWriteProc)(thandle_t, +tdata_t, tsize_t);<br> +typedef toff_t (*TIFFSeekProc)(thandle_t, toff_t, int);<br> +typedef int (*TIFFCloseProc)(thandle_t);<br> +typedef toff_t (*TIFFSizeProc)(thandle_t);<br> +typedef int (*TIFFMapFileProc)(thandle_t, tdata_t*, +toff_t*);<br> +typedef void (*TIFFUnmapFileProc)(thandle_t, tdata_t, +toff_t);</b></p> +<!-- INDENTATION --> +<p><b>TIFF* TIFFClientOpen(const char +*</b><i>filename</i><b>, const char *</b><i>mode</i><b>, +thandle_t</b> <i>clientdata</i><b>, TIFFReadWriteProc</b> +<i>readproc</i><b>, TIFFReadWriteProc</b> +<i>writeproc</i><b>, TIFFSeekProc</b> <i>seekproc</i><b>, +TIFFCloseProc</b> <i>closeproc</i><b>, TIFFSizeProc</b> +<i>sizeproc</i><b>, TIFFMapFileProc</b> <i>mapproc</i><b>, +TIFFUnmapFileProc</b> <i>unmapproc</i><b>)</b></p> +</td> +</table> +<a name="DESCRIPTION"></a> +<h2>DESCRIPTION</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p><i>TIFFOpen</i> opens a <small>TIFF</small> file whose +name is <i>filename</i> and returns a handle to be used in +subsequent calls to routines in <i>libtiff</i>. If the open +operation fails, then zero is returned. The <i>mode</i> +parameter specifies if the file is to be opened for reading +(‘‘r’’), writing +(‘‘w’’), or appending +(‘‘a’’) and, optionally, whether to +override certain default aspects of library operation (see +below). When a file is opened for appending, existing data +will not be touched; instead new data will be written as +additional subfiles. If an existing file is opened for +writing, all previous data is overwritten.</p> +<!-- INDENTATION --> +<p>If a file is opened for reading, the first +<small>TIFF</small> directory in the file is automatically +read (also see <i>TIFFSetDirectory</i>(3TIFF) for reading +directories other than the first). If a file is opened for +writing or appending, a default directory is automatically +created for writing subsequent data. This directory has all +the default values specified in <small>TIFF</small> Revision +6.0: <i>BitsPerSample</i>=1, <i>ThreshHolding</i>=bilevel +art scan, <i>FillOrder</i>=1 (most significant bit of each +data byte is filled first), <i>Orientation</i>=1 (the 0th +row represents the visual top of the image, and the 0th +column represents the visual left hand side), +<i>SamplesPerPixel</i>=1, <i>RowsPerStrip</i>=infinity, +<i>ResolutionUnit</i>=2 (inches), and <i>Compression</i>=1 +(no compression). To alter these values, or to define values +for additional fields, <i>TIFFSetField</i>(3TIFF) must be +used.</p> +<!-- INDENTATION --> +<p><i>TIFFFdOpen</i> is like <i>TIFFOpen</i> except that it +opens a <small>TIFF</small> file given an open file +descriptor <i>fd</i>. The file’s name and mode must +reflect that of the open descriptor. The object associated +with the file descriptor <b>must support random +access</b>.</p> +<!-- INDENTATION --> +<p><i>TIFFClientOpen</i> is like <i>TIFFOpen</i> except that +the caller supplies a collection of functions that the +library will use to do <small>UNIX</small> -like I/O +operations. The <i>readproc</i> and <i>writeproc</i> are +called to read and write data at the current file position. +<i>seekproc</i> is called to change the current file +position a la <i>lseek</i>(2). <i>closeproc</i> is invoked +to release any resources associated with an open file. +<i>sizeproc</i> is invoked to obtain the size in bytes of a +file. <i>mapproc</i> and <i>unmapproc</i> are called to map +and unmap a file’s contents in memory; c.f. +<i>mmap</i>(2) and <i>munmap</i>(2). The <i>clientdata</i> +parameter is an opaque ‘‘handle’’ +passed to the client-specified routines passed as parameters +to <i>TIFFClientOpen</i>.</p> +</td> +</table> +<a name="OPTIONS"></a> +<h2>OPTIONS</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p>The open mode parameter can include the following flags +in addition to the ‘‘r’’, +‘‘w’’, and +‘‘a’’ flags. Note however that +option flags must follow the read-write-append +specification.</p> +</td> +</table> +<!-- TABS --> +<table width="100%" border=0 rules="none" frame="void" + cols="5" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>l</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>When creating a new file force information be written +with Little-Endian byte order (but see below). By default +the library will create new files using the native +<small>CPU</small> byte order.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>b</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>When creating a new file force information be written +with Big-Endian byte order (but see below). By default the +library will create new files using the native +<small>CPU</small> byte order.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>L</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Force image data that is read or written to be treated +with bits filled from Least Significant Bit ( +<small>LSB</small> ) to Most Significant Bit ( +<small>MSB</small> ). Note that this is the opposite to the +way the library has worked from its inception.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>B</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Force image data that is read or written to be treated +with bits filled from Most Significant Bit ( +<small>MSB</small> ) to Least Significant Bit ( +<small>LSB</small> ); this is the default.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>H</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Force image data that is read or written to be treated +with bits filled in the same order as the native +<small>CPU.</small></p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>M</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Enable the use of memory-mapped files for images opened +read-only. If the underlying system does not support +memory-mapped files or if the specific image being opened +cannot be memory-mapped then the library will fallback to +using the normal system interface for reading information. +By default the library will attempt to use memory-mapped +files.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>m</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Disable the use of memory-mapped files.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>C</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Enable the use of ‘‘strip +chopping’’ when reading images that are +comprised of a single strip or tile of uncompressed data. +Strip chopping is a mechanism by which the library will +automatically convert the single-strip image to multiple +strips, each of which has about 8 Kilobytes of data. This +facility can be useful in reducing the amount of memory used +to read an image because the library normally reads each +strip in its entirety. Strip chopping does however alter the +apparent contents of the image because when an image is +divided into multiple strips it looks as though the +underlying file contains multiple separate strips. Finally, +note that default handling of strip chopping is a +compile-time configuration parameter. The default behaviour, +for backwards compatibility, is to enable strip +chopping.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>c</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Disable the use of strip chopping when reading +images.</p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="2%"> + +<p><b>h</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Read TIFF header only, do not load the first image +directory. That could be useful in case of the broken first +directory. We can open the file and proceed to the other +directories.</p> +</td> +<td width="0%"> +</td> +</table> +<a name="BYTE ORDER"></a> +<h2>BYTE ORDER</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p>The <small>TIFF</small> specification (<b>all +versions</b>) states that compliant readers <i>must be +capable of reading images written in either byte order</i>. +Nonetheless some software that claims to support the reading +of <small>TIFF</small> images is incapable of reading images +in anything but the native <small>CPU</small> byte order on +which the software was written. (Especially notorious are +applications written to run on Intel-based machines.) By +default the library will create new files with the native +byte-order of the <small>CPU</small> on which the +application is run. This ensures optimal performance and is +portable to any application that conforms to the TIFF +specification. To force the library to use a specific +byte-order when creating a new file the +‘‘b’’ and +‘‘l’’ option flags may be included +in the call to open a file; for example, +‘‘wb’’ or +‘‘wl’’.</p> +</td> +</table> +<a name="RETURN VALUES"></a> +<h2>RETURN VALUES</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p>Upon successful completion <i>TIFFOpen</i>, +<i>TIFFFdOpen</i>, and <i>TIFFClientOpen</i> return a +<small>TIFF</small> pointer. Otherwise, NULL is +returned.</p> +</td> +</table> +<a name="DIAGNOSTICS"></a> +<h2>DIAGNOSTICS</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p>All error messages are directed to the +<i>TIFFError</i>(3TIFF) routine. Likewise, warning messages +are directed to the <i>TIFFWarning</i>(3TIFF) routine.</p> +<!-- INDENTATION --> +<p><b>"%s": Bad mode</b>. The specified +<i>mode</i> parameter was not one of +‘‘r’’ (read), +‘‘w’’ (write), or +‘‘a’’ (append).</p> +<!-- INDENTATION --> +<p><b>%s: Cannot open</b>. <i>TIFFOpen</i>() was unable to +open the specified filename for read/writing.</p> +<!-- INDENTATION --> +<p><b>Cannot read TIFF header</b>. An error occurred while +attempting to read the header information.</p> +<!-- INDENTATION --> +<p><b>Error writing TIFF header</b>. An error occurred while +writing the default header information for a new file.</p> +<!-- INDENTATION --> +<p><b>Not a TIFF file, bad magic number %d (0x%x)</b>. The +magic number in the header was not (hex) 0x4d4d or (hex) +0x4949.</p> +<!-- INDENTATION --> +<p><b>Not a TIFF file, bad version number %d (0x%x)</b>. The +version field in the header was not 42 (decimal).</p> +<!-- INDENTATION --> +<p><b>Cannot append to file that has opposite byte +ordering</b>. A file with a byte ordering opposite to the +native byte ordering of the current machine was opened for +appending (‘‘a’’). This is a +limitation of the library.</p> +</td> +</table> +<a name="SEE ALSO"></a> +<h2>SEE ALSO</h2> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="8%"></td> +<td width="91%"> +<p><i>libtiff</i>(3TIFF), <i>TIFFClose</i>(3TIFF)</p> +</td> +</table> +<hr> +</body> +</html> |