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|
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<title>libics: Top-Level Interface</title>
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<p class=header>libics v.1.5 Online Documentation. ©2000-2010 by Cris Luengo and others.</p>
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<li><a href="#general">General library functions</a></li>
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<h1>Top-level interface to libics</h1>
<p>The functions below represent the <strong>recommended</strong> way of
reading and writing ICS files using this library. You need to add
<tt class="preprocess">#include "libics.h"</tt> to your source files.</p>
<p>Most functions return an
<tt class="typeident"><a href="Ics_Error.html">Ics_Error</a></tt>
value. For these functions we have listed the values this function
could return. If the function completes its task successfully, it returns
<tt class="constant">IcsErr_Ok</tt>. Some of the error codes
(like <tt class="constant">IcsErr_NotValidAction</tt>) are returned when
"asserts" fail. These shouldn't happen if you wrote your program correctly.
See "<a href="Ics_Error.html">Error codes returned by the library functions</a>"
for a detailed description of each error code.</p>
<p>This functions in this page are organized in the following categories,
and sorted alphabetically:</p>
<ul>
<li><a href="#general">General library functions</a></li>
<li><a href="#reading">Reading image data</a></li>
<li><a href="#writing">Writing image data</a></li>
<li><a href="#metadata">Image metadata functions</a></li>
<li><a href="#history">History metadata functions</a></li>
<li><a href="#sensor">Sensor metadata functions</a></li>
<li><a href="#testing">Testing functions</a></li>
</ul>
<h2><a name="general"></a>General library functions</h2>
<h3 class="ident"><a name="IcsClose"></a>IcsClose</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsClose</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>);
</p>
<p>Close the ICS file. The ics 'stream' is no longer
valid after this. No files are actually written until this function is
called.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_CompressionProblem</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_FailWriteLine</tt>,
<tt class="constant">IcsErr_FCloseIcs</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FCopyIds</tt>,
<tt class="constant">IcsErr_FOpenIcs</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FTempMoveIcs</tt>,
<tt class="constant">IcsErr_FWriteIcs</tt>,
<tt class="constant">IcsErr_FWriteIds</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NoLayout</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_TooManyChans</tt>,
<tt class="constant">IcsErr_TooManyDims</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>,
<tt class="constant">IcsErr_UnknownDataType</tt>.</p>
<h3 class="ident"><a name="IcsGetErrorText"></a>IcsGetErrorText</h3>
<p class="synopsis">
<span class="keyword">char const</span>* <span class="funcident">IcsGetErrorText</span>
(<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="varident">error</span>);
</p>
<p>Returns a pointer to a textual representation of
the error message in <tt class="varident">error</tt>.
<h3 class="ident"><a name="IcsGetLibVersion"></a>IcsGetLibVersion</h3>
<p class="synopsis">
<span class="keyword">char const</span>* <span class="funcident">IcsGetLibVersion</span>
(<span class="keyword">void</span>);
</p>
<p>Returns a string that can be used to compare against
<tt class="constant">ICSLIB_VERSION</tt> to check if the version of the
library is the same as that of the headers.</p>
<h3 class="ident"><a name="IcsLoadPreview"></a>IcsLoadPreview</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsLoadPreview</span>
(<span class="keyword">char const</span>* <span class="varident">filename</span>,
<span class="keyword">size_t</span> <span class="varident">planenumber</span>,
<span class="keyword">void</span>** <span class="varident">dest</span>,
<span class="keyword">size_t</span>* <span class="varident">xsize</span>,
<span class="keyword">size_t</span>* <span class="varident">ysize</span>);
</p>
<p>Read a 2D preview image out of an ICS file.
<tt class="varident">*dest</tt> is set to a buffer that you should <tt class="funcident">free</tt>
yourself. <tt class="varident">*xsize</tt> and <tt class="varident">*ysize</tt> are set to the
image size, and the buffer is filled with a 2D slice out of the image, converted to 8-bit unsigned
integers. The slice is chosen with <tt class="varident">planenumber</tt> (see
<tt class="funcident"><a href="#IcsGetPreviewData">IcsGetPreviewData</a></tt>).
<p>This function does currently not work when the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_BufferTooSmall</tt>,
<tt class="constant">IcsErr_CompressionProblem</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FailWriteLine</tt>,
<tt class="constant">IcsErr_FCloseIcs</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FOpenIcs</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIcs</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_FWriteIcs</tt>,
<tt class="constant">IcsErr_FWriteIds</tt>,
<tt class="constant">IcsErr_IllegalROI</tt>,
<tt class="constant">IcsErr_LineOverflow</tt>,
<tt class="constant">IcsErr_MissBits</tt>,
<tt class="constant">IcsErr_MissCat</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_MissLayoutSubCat</tt>,
<tt class="constant">IcsErr_MissParamSubCat</tt>,
<tt class="constant">IcsErr_MissRepresSubCat</tt>,
<tt class="constant">IcsErr_MissSensorSubSubCat</tt>,
<tt class="constant">IcsErr_NoLayout</tt>,
<tt class="constant">IcsErr_NotIcsFile</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_OutputNotFilled</tt>,
<tt class="constant">IcsErr_TooManyChans</tt>,
<tt class="constant">IcsErr_TooManyDims</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>,
<tt class="constant">IcsErr_UnknownDataType</tt>.</p>
<h3 class="ident"><a name="IcsOpen"></a>IcsOpen</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsOpen</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>** <span class="varident">ics</span>,
<span class="keyword">char const</span>* <span class="varident">filename</span>,
<span class="keyword">char const</span>* <span class="varident">mode</span>);
</p>
<p>Open an ICS file for reading
(<tt class="varident">mode</tt> = <tt class="constant">"r"</tt>)
or writing
(<tt class="varident">mode</tt> = <tt class="constant">"w"</tt>)
or updating
(<tt class="varident">mode</tt> = <tt class="constant">"rw"</tt>).
When writing, append a <tt class="constant">"2"</tt> to
<tt class="varident">mode</tt> to create an ICS version 2.0 file, or a
<tt class="constant">"1"</tt> for ICS v.1.0 (1 is the default for the time
being). When reading or updating, append an <tt class="constant">"f"</tt> to
<tt class="varident">mode</tt> to avoid the file extension to be forced to
<tt class="constant">".ics"</tt>.</p>
<p>In the <tt class="constant">"rw"</tt> mode, it is possible to change
all of the meta-data in the file, but not the actual data. To change the
data, read in the image in the normal way, change it and then write it
out.</p>
<p>The standard requires the <tt class="constant">"C"</tt> locale to be in
effect when writing the ICS header, which means that numbers are written
using a dot as a decimal separator, and no separator for thousands. If you
happen to have an ICS file written using, e.g., the German locale, which
would contain a number written as <tt class="constant">5.755,34</tt>
instead of <tt class="constant">5755.34</tt>, you can read this file by
setting the locale (in C this is done with <tt class="funcident">setlocale</tt>)
to German, then opening the file with an <tt class="constant">"l"</tt>
appended to the <tt class="varident">mode</tt> string:</p>
<p class="synopsis">
<span class="funcident">IcsOpen</span> (&<span class="varident">ics</span>,
<tt class="constant">"germanfile.ics"</tt>, <tt class="constant">"rl"</tt>)</p>
<p>Note that this option does not work when writing a file: all ICS files
written by this library use the locale specified in the standard. Consequently,
when updating such an ICS file, it will be converted to the
<tt class="constant">"C"</tt> locale.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_FCloseIcs</tt>,
<tt class="constant">IcsErr_FOpenIcs</tt>,
<tt class="constant">IcsErr_FReadIcs</tt>,
<tt class="constant">IcsErr_IllParameter</tt>,
<tt class="constant">IcsErr_LineOverflow</tt>,
<tt class="constant">IcsErr_MissBits</tt>,
<tt class="constant">IcsErr_MissCat</tt>,
<tt class="constant">IcsErr_MissLayoutSubCat</tt>,
<tt class="constant">IcsErr_MissParamSubCat</tt>,
<tt class="constant">IcsErr_MissRepresSubCat</tt>,
<tt class="constant">IcsErr_MissSensorSubSubCat</tt>,
<tt class="constant">IcsErr_NotIcsFile</tt>,
<tt class="constant">IcsErr_TooManyChans</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h3 class="ident"><a name="IcsVersion"></a>IcsVersion</h3>
<p class="synopsis">
<span class="keyword">int</span> <span class="funcident">IcsVersion</span>
(<span class="keyword">char const</span>* <span class="varident">filename</span>,
<span class="keyword">int</span> <span class="varident">forcename</span>);
</p>
<p>Returns 0 if the file specified by name is not an ICS file,
or the version number if it is. When <tt class="varident">forcename</tt> is non-zero,
the <tt class="constant">".ics"</tt> extension is not added.</p>
<h2><a name="reading"></a>Reading image data</h2>
<p>These functions are available on files opened for reading.</p>
<h3 class="ident"><a name="IcsGetData"></a>IcsGetData</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetData</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void</span>* <span class="varident">dest</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>);
</p>
<p>Read the actual image data from an ICS file, as a single block.
<tt class="varident">n</tt> is the size of the buffer
<tt class="varident">dest</tt>, which must be the exact same size as
reported by
<tt class="funcident"><a href="#IcsGetDataSize">IcsGetDataSize</a></tt></p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h3 class="ident"><a name="IcsGetDataBlock"></a>IcsGetDataBlock</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetDataBlock</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void</span>* <span class="varident">dest</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>);
</p>
<p>Read a portion of the actual image data from an ICS file.
<tt class="varident">n</tt> is the size of the buffer
<tt class="varident">dest</tt> in bytes.</p>
<p>When the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>,
this function can only be called once. That is, only one block of data, starting
at the beginning, can be read from the file.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h3 class="ident"><a name="IcsGetDataSize"></a>IcsGetDataSize</h3>
<p class="synopsis">
<span class="keyword">size_t</span> <span class="funcident">IcsGetDataSize</span>
(<span class="typeident"><a href= "Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>);
</p>
<p>Returns the size of the data block in bytes.</p>
<h3 class="ident"><a name="IcsGetDataWithStrides"></a>IcsGetDataWithStrides</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetDataWithStrides</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void const</span>* <span class="varident">src</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>,
<span class="keyword">size_t const</span>* <span class="varident">strides</span>,
<span class="keyword">int</span> <span class="varident">ndims</span>);
</p>
<p>Same as
<tt class="funcident"><a href="#IcsGetData">IcsGetData</a></tt>, except
a pointer to an array <tt class="varident">strides</tt> is also given.
<tt class="varident">ndims</tt> is the length of this array and should be
equal to the dimensionality of the data as returned by
<tt class="funcident"><a href="#IcsGetLayout">IcsGetLayout</a></tt></p>
<p>This function does currently not work when the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_IllParameter</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h3 class="ident"><a name="IcsGetImageSize"></a>IcsGetImageSize</h3>
<p class="synopsis">
<span class="keyword">size_t</span> <span class="funcident">IcsGetImageSize</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>);
</p>
<p>Returns the size of the image in imels.</p>
<h3 class="ident"><a name="IcsGetImelSize"></a>IcsGetImelSize</h3>
<p class="synopsis">
<span class="keyword">size_t</span> <span class="funcident">IcsGetImelSize</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>);
</p>
<p>Returns the size of imels in bytes.</p>
<h3 class="ident"><a name="IcsGetLayout"></a>IcsGetLayout</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetLayout</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="typeident"><a href="Enums.html#Ics_DataType">Ics_DataType</a></span>* <span class="varident">dt</span>,
<span class="keyword">int</span>* <span class="varident">ndims</span>,
<span class="keyword">size_t</span>* <span class="varident">dims</span>);
</p>
<p>Retrieve the layout of an ICS image.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetPreviewData"></a>IcsGetPreviewData</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetPreviewData</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void</span>* <span class="varident">dest</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>,
<span class="keyword">size_t</span> <span class="varident">planenumber</span>);
</p>
<p>Read a plane of the actual image data from an ICS file, and
convert it to 8-bit unsigned integers.
<tt class="varident">n</tt> is the size of the buffer
<tt class="varident">dest</tt> in bytes, and should be equal to
<tt><span class="varident">dims</span>[<span class="constant">0</span>]*<span class="varident">dims</span>[<span class="constant">1</span>]</tt>,
as returned by <tt class="funcident"><a href="#IcsGetLayout">IcsGetLayout</a></tt>.
<tt class="varident">planenumber</tt> is the number of the 2D plane in the file. For example,
to read the plane defined by
<tt>[<span class="constant">:</span>,<span class="constant">:</span>,<span class="constant">m</span>,<span class="constant">n</span>,<span class="constant">k</span>]</tt>,
set <tt class="varident">planenumber</tt> to
<tt><span class="constant">m</span> + <span class="constant">n</span>*<span class="varident">dims</span>[<span class="constant">2</span>] +
<span class="constant">k</span>*<span class="varident">dims</span>[<span class="constant">2</span>]*<span class="varident">dims</span>[<span class="constant">3</span>]</tt>.</p>
<p>This function does currently not work when the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_BufferTooSmall</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_IllegalROI</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_OutputNotFilled</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>,
<tt class="constant">IcsErr_UnknownDataType</tt>.</p>
<h3 class="ident"><a name="IcsGetROIData"></a>IcsGetROIData</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetROIData</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">size_t const</span>* <span class="varident">offset</span>,
<span class="keyword">size_t const</span>* <span class="varident">size</span>,
<span class="keyword">size_t const</span>* <span class="varident">sampling</span>,
<span class="keyword">void</span>* <span class="varident">dest</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>);
</p>
<p>Read a square region of the actual image from an ICS file. The
region is defined by <tt class="varident">offset</tt> and <tt class="varident">size</tt>,
both of which are integer arrays with <tt class="varident">ndims</tt> elements (as
reported by <tt class="funcident"><a href="#IcsGetLayout">IcsGetLayout</a></tt>).
<tt class="varident">sampling</tt> allows you to sub-sample the image. It also is an
array with <tt class="varident">ndims</tt> elements. If any of these parameters is
set to <tt class="constant">NULL</tt>, the default is used (the offset is 0, the size
is equal to the image size, and the sampling is 1 in each direction).</p>
<p>This function does currently not work when the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BitsVsSizeConfl</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_BufferTooSmall</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FCloseIds</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_IllegalROI</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_OutputNotFilled</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h3 class="ident"><a name="IcsGetSignificantBits"></a>IcsGetSignificantBits</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetSignificantBits</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">size_t</span>* <span class="varident">nbits</span>);
</p>
<p>Get the number of significant bits.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSkipDataBlock"></a>IcsSkipDataBlock</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSkipDataBlock</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>);
</p>
<p>Skip a portion of the actual image data in an ICS file.
<tt class="varident">n</tt> is the number of bytes to skip. Use this function
together with
<tt class="funcident"><a href="#IcsGetDataBlock">IcsGetDataBlock</a></tt> to
read in the portion of the image you are interested in. Note the function
<tt class="funcident"><a href="#IcsGetROIData">IcsGetROIData</a></tt>, which
might simplifies this task.</p>
<p>This function does currently not work when the data is compressed with
<tt class="constant"><a href="Enums.html#Ics_Compression">IcsCompr_compress</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_BlockNotAllowed</tt>,
<tt class="constant">IcsErr_CorruptedStream</tt>,
<tt class="constant">IcsErr_DecompressionProblem</tt>,
<tt class="constant">IcsErr_EndOfStream</tt>,
<tt class="constant">IcsErr_FOpenIds</tt>,
<tt class="constant">IcsErr_FReadIds</tt>,
<tt class="constant">IcsErr_MissingData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_UnknownCompression</tt>.</p>
<h2><a name="writing"></a>Writing image data</h2>
<p>These functions are available on files opened for writing.</p>
<h3 class="ident"><a name="IcsSetCompression"></a>IcsSetCompression</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetCompression</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident"><a href="Enums.html#Ics_Compression">Ics_Compression</a></span> <span class="varident"> compression</span>,
<span class="keyword">int</span> <span class="varident">level</span>);
</p>
<p>Set the compression method and compression
parameter. Data is written uncompressed by default.
If you try to set the compression to
<tt class="constant">IcsCompr_compress</tt>, you'll
get <tt class="constant">IcsCompr_gzip</tt> instead.
See available methods and significance of the parameter
at the <tt class="typeident"><a href="Enums.html#Ics_Compression">Ics_Compression</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetData"></a>IcsSetData</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetData</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void const</span>* <span class="varident">src</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>);
</p>
<p>Set the image data for an ICS image. The pointer to
this data must be accessible until
<tt class="funcident"><a href="#IcsClose">IcsClose</a></tt> has been called.
If the size <tt class="varident">n</tt> of the data is not equal to what is
expected according to the image sizes set previously by
<tt class="funcident"><a href="#IcsSetLayout">IcsSetLayout</a></tt>, a value
of <tt class="constant">IcsErr_FSizeConflict</tt> is returned.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_DuplicateData</tt>,
<tt class="constant">IcsErr_FSizeConflict</tt>,
<tt class="constant">IcsErr_NoLayout</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetDataWithStrides"></a>IcsSetDataWithStrides</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetDataWithStrides</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">void const</span>* <span class="varident">src</span>,
<span class="keyword">size_t</span> <span class="varident">n</span>,
<span class="keyword">size_t const</span>* <span class="varident">strides</span>,
<span class="keyword">int</span> <span class="varident">ndims</span>);
</p>
<p>Same as
<tt class="funcident"><a href="#IcsSetData">IcsSetData</a></tt>, except
a pointer to an array <tt class="varident">strides</tt> is also given.
This array must be accesible until
<tt class="funcident"><a href="#IcsClose">IcsClose</a></tt> has been called.
<tt class="varident">ndims</tt> is the length of this array and should be
equal to the dimensionality of the data as specified earlier through
<tt class="funcident"><a href="#IcsSetLayout">IcsSetLayout</a></tt></p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_DuplicateData</tt>,
<tt class="constant">IcsErr_FSizeConflict</tt>,
<tt class="constant">IcsErr_IllParameter</tt>,
<tt class="constant">IcsErr_NoLayout</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetLayout"></a>IcsSetLayout</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetLayout</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident"><a href="Enums.html#Ics_DataType">Ics_DataType</a></span> <span class="varident">dt</span>,
<span class="keyword">int</span> <span class="varident">ndims</span>,
<span class="keyword">size_t const</span>* <span class="varident">dims</span>);
</p>
<p>Set the layout for an ICS image.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>,
<tt class="constant">IcsErr_TooManyDims</tt>.</p>
<h3 class="ident"><a name="IcsSetSignificantBits"></a>IcsSetSignificantBits</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetSignificantBits</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">size_t</span> <span class="varident">nbits</span>);
</p>
<p>Set the number of significant bits.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NoLayout</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetSource"></a>IcsSetSource</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetSource</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char const</span>* <span class="varident">fname</span>,
<span class="keyword">size_t</span> <span class="varident">offset</span>);
</p>
<p>Set the image source parameter for an ICS version
2.0 file.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_DuplicateData</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h2><a name="metadata"></a>Image metadata functions</h2>
<h3 class="ident"><a name="IcsGetCoordinateSystem"></a>IcsGetCoordinateSystem</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetCoordinateSystem</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">char</span>* <span class="varident">coord</span>);
</p>
<p>Get the coordinate system used in the positioning of
the pixels. Related to <tt class="funcident"><a href="#IcsGetPosition">
IcsGetPosition</a></tt>. The default is <tt class="constant">
"video"</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetImelUnits"></a>IcsGetImelUnits</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetImelUnits</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">double</span>* <span class="varident">origin</span>,
<span class="keyword">double</span>* <span class="varident">scale</span>,
<span class="keyword">char</span>* <span class="varident">units</span>);
</p>
<p>Set the position of the pixel values: the offset and
scaling, and the units in which to measure. If you are not interested in
one of the parameters, set the pointer to <tt class="constant">NULL</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetOrder"></a>IcsGetOrder</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetOrder</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">int</span> <span class="varident">dimension</span>,
<span class="keyword">char</span>* <span class="varident">order</span>,
<span class="keyword">char</span>* <span class="varident">label</span>);
</p>
<p>Get the ordering of the dimensions in the image. The
ordering is defined by names and labels for each dimension. The defaults
are x, y, z, t (time) and p (probe). Dimensions start at 0.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetPosition"></a>IcsGetPosition</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetPosition</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">int</span> <span class="varident">dimension</span>,
<span class="keyword">double</span>* <span class="varident">origin</span>,
<span class="keyword">double</span>* <span class="varident">scale</span>,
<span class="keyword">char</span>* <span class="varident">units</span>);
</p>
<p>Get the position of the image in the real world: the
origin of the first pixel, the distances between pixels and the units in
which to measure. If you are not interested in one of the parameters, set
the pointer to <tt class="constant">NULL</tt>. Dimensions start at 0.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetScilType"></a>IcsGetScilType</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetScilType</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>,
<span class="keyword">char</span>* <span class="varident">sciltype</span>);
</p>
<p>Get the string for the SCIL_TYPE parameter. This string is
used only by SCIL_Image.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGuessScilType"></a>IcsGuessScilType</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGuessScilType</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>);
</p>
<p>As
<tt class="funcident"><a href="#IcsSetScilType">IcsSetScilType</a></tt>,
sets the string for the SCIL_TYPE parameter. This function creates a string
according to the values previously specified using
<tt class="funcident"><a href="#IcsSetLayout">IcsSetLayout</a></tt>.
It can create any of these strings:
<tt class="constant">"g2d"</tt>, <tt class="constant">"g3d"</tt>,
<tt class="constant">"f2d"</tt>, <tt class="constant">"f3d"</tt>,
<tt class="constant">"c2d"</tt> and <tt class="constant">"c3d"</tt>.
This string is used only by SCIL_Image, and is required if you want to read
the image using SCIL_Image. </p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NoScilType</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetCoordinateSystem"></a>IcsSetCoordinateSystem</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetCoordinateSystem</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char const</span>* <span class="varident">coord</span>);
</p>
<p>Set the coordinate system used in the positioning of
the pixels. Related to
<tt class="funcident"><a href="#IcsSetPosition">IcsSetPosition</a></tt>.
The default is <tt class="constant">"video"</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetImelUnits"></a>IcsSetImelUnits</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetImelUnits</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">double</span> <span class="varident">origin</span>,
<span class="keyword">double</span> <span class="varident">scale</span>,
<span class="keyword">char const</span>* <span class="varident">units</span>);
</p>
<p>Set the position of the pixel values: the offset and
scaling, and the units in which to measure. If units is
<tt class="constant">NULL</tt> or empty, it is set to the default value
of <tt class="constant">"relative"</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetPosition"></a>IcsSetPosition</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetPosition</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">int</span> <span class="varident">dimension</span>,
<span class="keyword">double</span> <span class="varident">origin</span>,
<span class="keyword">double</span> <span class="varident">scale</span>,
<span class="keyword">char const</span>* <span class="varident">units</span>);
</p>
<p>Set the position of the image in the real world: the
origin of the first pixel, the distances between pixels and the units in
which to measure. If <tt class="varident">units</tt> is <tt class=
"constant">NULL</tt> or empty, it is set to the default value of <tt
class="constant">"undefined"</tt>. Dimensions start at 0.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetOrder"></a>IcsSetOrder</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetOrder</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">int</span> <span class="varident">dimension</span>,
<span class="keyword">char const</span>* <span class="varident">order</span>,
<span class="keyword">char const</span>* <span class="varident">label</span>);
</p>
<p>Set the ordering of the dimensions in the image. The
ordering is defined by providing names and labels for each dimension. The
defaults are x, y, z, t (time) and p (probe). Dimensions start at 0.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsSetScilType"></a>IcsSetScilType</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsSetScilType</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char const</span>* <span class="varident">sciltype</span>);
</p>
<p>Set the string for the SCIL_TYPE parameter. This string
is used only by SCIL_Image, and is required if you want to read the image using
SCIL_Image.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h2><a name="history"></a>History metadata functions</h2>
<p>The functions below give access to the history lines. The structure
where these are stored is hidden from the user, making these functions
the only method of access. A history line in an ICS file starts with
the token "history", then has an optional key token, and then any
string. These three parts are separated by tab characters, but the
string can contain tab characters also, effectively allowing the user
even more subdivisions in the hierarchy. The history lines can contain
any information the user wishes to put into the file.</p>
<p>Some functions below use <tt class="typeident">Ics_HistoryIterator</tt>,
a struct initialized by
<tt class="funcident"><a href="#IcsNewHistoryIterator">IcsNewHistoryIterator</a></tt>.
It is always set to point to the next available string, and also contains
the index to the previously retrieved string. It is possible to set up an
iterator to fetch each of the history strings in turn, or to fetch only
those that have a particular key.</p>
<h3 class="ident"><a name="IcsAddHistoryString"></a>IcsAddHistoryString</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsAddHistoryString</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char const</span>* <span class="varident">key</span>,
<span class="keyword">char const</span>* <span class="varident">value</span>);
</p>
<p>Add history lines to the ICS file. <tt class="varident">key</tt> can be
<tt class="constant">NULL</tt> or <tt class="constant">""</tt>, but value
must point to a string. Neither strings can contain newline characters, and
<tt class="varident">key</tt> cannot contain tab characters either.</p>
<p><tt class="funcident">IcsAddHistory</tt> is defined as an alias for this
function, for backwards compatability.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_IllParameter</tt>,
<tt class="constant">IcsErr_LineOverflow</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsDeleteHistory"></a>IcsDeleteHistory</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistory</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char</span>* <span class="varident">key</span>);
</p>
<p>Delete all history lines with key <tt class="varident">key</tt>. If
<tt class="varident">key</tt> is <tt class="constant">NULL</tt> or
<tt class="constant">""</tt>, it deletes all the history lines.</p>
<p class="info"><span class="headtxt">errors</span>:
none.</p>
<h3 class="ident"><a name="IcsDeleteHistoryStringI"></a>IcsDeleteHistoryStringI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistoryStringI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident">Ics_HistoryIterator</span>* <span class="varident">it</span>);
</p>
<p>Delete the last history lines retrieved through <tt class="varident">it</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
none.</p>
<h3 class="ident"><a name="IcsGetHistoryKeyValue"></a>IcsGetHistoryKeyValue</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistoryKeyValue</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char</span>* <span class="varident">key</span>,
<span class="keyword">char</span>* <span class="varident">value</span>,
<span class="typeident"><a href="Enums.html#Ics_HistoryWhich">Ics_HistoryWhich</a></span> <span class="varident">which</span>);
</p>
<p>Get the history lines from the ICS file. <tt class="varident">key</tt>
must have at least <tt class="constant">ICS_STRLEN_TOKEN</tt> characters
allocated, and <tt class="varident">value</tt> at least
<tt class="constant">ICS_LINE_LENGTH</tt>. <tt class="varident">key</tt>
can be <tt class="constant">NULL</tt>, in which case the key will be discarded.
The <tt class="varident">which</tt> parameter must be set to
<tt class="constant">IcsWhich_First</tt> to read the first string in the buffer,
and to <tt class="constant">IcsWhich_Next</tt> in subsequent calls to get the
other strings.</p>
<p><tt class="funcident">IcsGetHistoryKeyValue</tt> shares and internal iterator with
<tt class="funcident"><a href="#IcsGetHistoryString">IcsGetHistoryString</a></tt>,
and calls
<tt class="funcident"><a href="#IcsGetHistoryKeyValueI">IcsGetHistoryKeyValueI</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_EndOfHistory</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetHistoryKeyValueI"></a>IcsGetHistoryKeyValueI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistoryKeyValueI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident">Ics_HistoryIterator</span>* <span class="varident">it</span>,
<span class="keyword">char</span>* <span class="varident">key</span>,
<span class="keyword">char</span>* <span class="varident">value</span>);
</p>
<p>Get the history lines from the ICS file. <tt class="varident">key</tt>
must have at least <tt class="constant">ICS_STRLEN_TOKEN</tt> characters
allocated, and <tt class="varident">value</tt> at least
<tt class="constant">ICS_LINE_LENGTH</tt>. <tt class="varident">key</tt>
can be <tt class="constant">NULL</tt>, in which case the key will be discarded.
The <tt class="varident">it</tt> parameter must point to a
<tt class="typeident">Ics_HistoryIterator</tt> structure initialized by
<tt class="funcident"><a href="#IcsNewHistoryIterator">IcsNewHistoryIterator</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_EndOfHistory</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetHistoryString"></a>IcsGetHistoryString</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistoryString</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">char</span>* <span class="varident">string</span>,
<span class="typeident"><a href="Enums.html#Ics_HistoryWhich">Ics_HistoryWhich</a></span> <span class="varident">which</span>);
</p>
<p>Get the history lines from the ICS file. <tt class="varident">string</tt>
must have at least <tt class="constant">ICS_LINE_LENGTH</tt> characters allocated.
The <tt class="varident">which</tt> parameter must be set to
<tt class="constant">IcsWhich_First</tt> to read the first string in the buffer,
and to <tt class="constant">IcsWhich_Next</tt> in subsequent calls to get the
other strings.</p>
<p><tt class="funcident">IcsGetHistoryString</tt> shares and internal iterator with
<tt class="funcident"><a href="#IcsGetHistoryKeyValue">IcsGetHistoryKeyValue</a></tt>,
and calls
<tt class="funcident"><a href="#IcsGetHistoryStringI">IcsGetHistoryStringI</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_EndOfHistory</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetHistoryStringI"></a>IcsGetHistoryStringI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetHistoryStringI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident">Ics_HistoryIterator</span>* <span class="varident">it</span>,
<span class="keyword">char</span>* <span class="varident">string</span>);
</p>
<p>Get the history lines from the ICS file. <tt class="varident">string</tt>
must have at least <tt class="constant">ICS_LINE_LENGTH</tt> characters allocated.
The <tt class="varident">it</tt> parameter must point to a
<tt class="typeident">Ics_HistoryIterator</tt> structure initialized by
<tt class="funcident"><a href="#IcsNewHistoryIterator">IcsNewHistoryIterator</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_EndOfHistory</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsGetNumHistoryStrings"></a>IcsGetNumHistoryStrings</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsGetNumHistoryStrings</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="keyword">int</span>* <span class="varident">num</span>);
</p>
<p>Get the number of history lines from the ICS file. <tt class="varident">num</tt>
is the number of times you can call
<tt class="funcident"><a href="#IcsGetHistoryString">IcsGetHistoryString</a></tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsNewHistoryIterator"></a>IcsNewHistoryIterator</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsNewHistoryIterator</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident">Ics_HistoryIterator</span>* <span class="varident">it</span>,
<span class="keyword">char</span>* <span class="varident">key</span>);
</p>
<p>Initializes a history iterator. <tt class="varident">key</tt>
can be <tt class="constant">NULL</tt>.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_EndOfHistory</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h3 class="ident"><a name="IcsReplaceHistoryStringI"></a>IcsReplaceHistoryStringI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="funcident">IcsReplaceHistoryStringI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>* <span class="varident">ics</span>,
<span class="typeident">Ics_HistoryIterator</span>* <span class="varident">it</span>,
<span class="keyword">char const</span>* <span class="varident">key</span>,
<span class="keyword">char const</span>* <span class="varident">value</span>);
</p>
<p>Replace the last history lines retrieved through <tt class="varident">it</tt>.
<tt class="varident">key</tt> can be <tt class="constant">NULL</tt> or
<tt class="constant">""</tt>, but value must point to a string. Neither strings
can contain newline characters, and <tt class="varident">key</tt> cannot contain
tab characters either.</p>
<p class="info"><span class="headtxt">errors</span>:
<tt class="constant">IcsErr_Alloc</tt>,
<tt class="constant">IcsErr_IllParameter</tt>,
<tt class="constant">IcsErr_LineOverflow</tt>,
<tt class="constant">IcsErr_NotValidAction</tt>.</p>
<h2><a name="sensor"></a>Sensor metadata functions</h2>
<p>The functions below give access to the sensor parameters.
For each parameter both a Get and a Set function are provided.
The Set functions all perform error checking and insist that the ICS
structure is in writing or updating mode. Please note that
<tt class="funcident"><a href="#IcsEnableWriteSensor">IcsEnableWriteSensor</a></tt>
must be called to enable writing the sensor parameters to file.
To use these functions you need to add
<tt class="preprocess">#include "libics_sensor.h"</tt>
to your source files.</p>
<h3 class="ident"><a name="IcsEnableWriteSensor"></a>IcsEnableWriteSensor</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsEnableWriteSensor</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">enable</span>);
</p>
<p>Enable (or disable) writing the sensor parameters to disk. The second
parameter must be non-zero for enable, or zero for disable.</p>
<h3 class="ident"><a name="IcsGetSensorChannels"></a>IcsGetSensorChannels</h3>
<p class="synopsis">
<span class="keyword">int</span>
<span class="funcident">IcsGetSensorChannels</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return the number of sensor channels.</p>
<h3 class="ident"><a name="IcsGetSensorEmissionWavelength"></a>IcsGetSensorEmissionWavelength</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorEmissionWavelength</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>);
</p>
<p>Return the emission wavelength for a given channel.</p>
<h3 class="ident"><a name="IcsGetSensorExcitationWavelength"></a>IcsGetSensorExcitationWavelength</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorExcitationWavelength</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>);
</p>
<p>Return the excitation wavelength for a given channel.</p>
<h3 class="ident"><a name="IcsGetSensorLensRI"></a>IcsGetSensorLensRI</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorLensRI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return the design medium refractive index.</p>
<h3 class="ident"><a name="IcsGetSensorMediumRI"></a>IcsGetSensorMediumRI</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorMediumRI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return the embedding medium refractive index.</p>
<h3 class="ident"><a name="IcsGetSensorModel"></a>IcsGetSensorModel</h3>
<p class="synopsis">
<span class="keyword">char const</span>*
<span class="funcident">IcsGetSensorModel</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return a pointer to the sensor model string.</p>
<h3 class="ident"><a name="IcsGetSensorNumAperture"></a>IcsGetSensorNumAperture</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorNumAperture</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return the sensor numerical apperture.</p>
<h3 class="ident"><a name="IcsGetSensorPhotonCount"></a>IcsGetSensorPhotonCount</h3>
<p class="synopsis">
<span class="keyword">int</span>
<span class="funcident">IcsGetSensorPhotonCount</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>);
</p>
<p>Return the excitation photon count for a given channel.</p>
<h3 class="ident"><a name="IcsGetSensorPinholeRadius"></a>IcsGetSensorPinholeRadius</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorPinholeRadius</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>);
</p>
<p>Return the pinhole radius for a given channel.</p>
<h3 class="ident"><a name="IcsGetSensorPinholeSpacing"></a>IcsGetSensorPinholeSpacing</h3>
<p class="synopsis">
<span class="keyword">double</span>
<span class="funcident">IcsGetSensorPinholeSpacing</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return the Nipkow Disk pinhole spacing.</p>
<h3 class="ident"><a name="IcsGetSensorType"></a>IcsGetSensorType</h3>
<p class="synopsis">
<span class="keyword">char const</span>*
<span class="funcident">IcsGetSensorType</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>
<span class="keyword">const</span>*
<span class="varident">ics</span>);
</p>
<p>Return a pointer to the sensor type string.</p>
<h3 class="ident"><a name="IcsSetSensorChannels"></a>IcsSetSensorChannels</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorChannels</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channels</span>);
</p>
<p>Set the number of sensor channels. This number may not exceed
<tt class="constant">ICS_MAX_LAMBDA</tt>.</p>
<h3 class="ident"><a name="IcsSetSensorEmissionWavelength"></a>IcsSetSensorEmissionWavelength</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorEmissionWavelength</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>,
<span class="keyword">double</span>
<span class="varident">wl</span>);
</p>
<p>Set the emission wavelength for a given channel. The channel index
must be less than the number of sensor channels.</p>
<h3 class="ident"><a name="IcsSetSensorExcitationWavelength"></a>IcsSetSensorExcitationWavelength</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorExcitationWavelength</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>,
<span class="keyword">double</span>
<span class="varident">wl</span>);
</p>
<p>Set the excitation wavelength for a given channel. The channel index
must be less than the number of sensor channels.</p>
<h3 class="ident"><a name="IcsSetSensorLensRI"></a>IcsSetSensorLensRI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorLensRI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">double</span>
<span class="varident">ri</span>);
</p>
<p>Set the design medium refractive index.</p>
<h3 class="ident"><a name="IcsSetSensorMediumRI"></a>IcsSetSensorMediumRI</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorMediumRI</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">double</span>
<span class="varident">ri</span>);
</p>
<p>Set the embedding medium refractive index.</p>
<h3 class="ident"><a name="IcsSetSensorModel"></a>IcsSetSensorModel</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorModel</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">char const</span>*
<span class="varident">sensor_model</span>);
</p>
<p>Set the sensor model string.</p>
<h3 class="ident"><a name="IcsSetSensorNumAperture"></a>IcsSetSensorNumAperture</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorNumAperture</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">double</span>
<span class="varident">na</span>);
</p>
<p>Set the sensor numerical apperture.</p>
<h3 class="ident"><a name="IcsSetSensorPhotonCount"></a>IcsSetSensorPhotonCount</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorPhotonCount</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>,
<span class="keyword">int</span>
<span class="varident">cnt</span>);
</p>
<p>Set the excitation photon count for a given channel. The channel index
must be less than the number of sensor channels.</p>
<h3 class="ident"><a name="IcsSetSensorPinholeRadius"></a>IcsSetSensorPinholeRadius</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorPinholeRadius</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">int</span>
<span class="varident">channel</span>,
<span class="keyword">double</span>
<span class="varident">radius</span>);
</p>
<p>Set the pinhole radius for a given channel. The channel index
must be less than the number of sensor channels.</p>
<h3 class="ident"><a name="IcsSetSensorPinholeSpacing"></a>IcsSetSensorPinholeSpacing</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorPinholeSpacing</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">double</span>
<span class="varident">spacing</span>);
</p>
<p>Set the Nipkow Disk pinhole spacing.</p>
<h3 class="ident"><a name="IcsSetSensorType"></a>IcsSetSensorType</h3>
<p class="synopsis">
<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span>
<span class="funcident">IcsSetSensorType</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span>*
<span class="varident">ics</span>,
<span class="keyword">char const</span>*
<span class="varident">sensor_type</span>);
</p>
<p>Set the sensor type string.</p>
<h2><a name="testing"></a>Testing functions</h2>
<p>The functions below allow the user to see what is happening inside libics.
You need to add <tt class="preprocess">#include "libics_test.h"</tt> to
your source files.</p>
<h3 class="ident"><a name="IcsPrintError"></a>IcsPrintError</h3>
<p class="synopsis">
<span class="keyword">void</span> <span class="funcident">IcsPrintError</span>
(<span class="typeident"><a href="Ics_Error.html">Ics_Error</a></span> <span class="varident">error</span>);
</p>
<p>Prints a textual representation of the error message
in <tt class="varident">error</tt> to <tt class="constant">stdout</tt>.
Uses <tt class="funcident"><a href="#IcsGetErrorText">IcsGetErrorText</a>
</tt> and <tt class="funcident">printf</tt>.</p>
<h3 class="ident"><a name="IcsPrintIcs"></a>IcsPrintIcs</h3>
<p class="synopsis">
<span class="keyword">void</span> <span class="funcident">IcsPrintIcs</span>
(<span class="typeident"><a href="Ics_Header.html">ICS</a></span> <span class="keyword">const</span>* <span class="varident">ics</span>);
</p>
<p>Prints the contents of the
<tt class="typeident"><a href="Ics_Header.html">ICS</a></tt>
structure in <tt class="varident">ics</tt> to <tt class="constant">stdout</tt>.
Uses <em>only</em> <tt class="funcident">printf</tt>.</p>
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