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<a name="libvips-basic"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libvips-basic.top_of_page"></a>basic</span></h2>
<p>basic — a few typedefs used everywhere</p>
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<div class="refsect1">
<a name="libvips-basic.stability-level"></a><h2>Stability Level</h2>
<acronym title="The intention of a Stable interface is to enable arbitrary third parties to
develop applications to these interfaces, release them, and have confidence that
they will run on all minor releases of the product (after the one in which the
interface was introduced, and within the same major release). Even at a major
release, incompatible changes are expected to be rare, and to have strong
justifications.
"><span class="acronym">Stable</span></acronym>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="libvips-basic.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libvips-basic.html#VipsCallbackFn" title="VipsCallbackFn ()">*VipsCallbackFn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libvips-basic.html#VipsSListMap2Fn" title="VipsSListMap2Fn ()">*VipsSListMap2Fn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libvips-basic.html#VipsSListMap4Fn" title="VipsSListMap4Fn ()">*VipsSListMap4Fn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libvips-basic.html#VipsSListFold2Fn" title="VipsSListFold2Fn ()">*VipsSListFold2Fn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="libvips-basic.html#vips-path-filename7" title="vips_path_filename7 ()">vips_path_filename7</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="libvips-basic.html#vips-path-mode7" title="vips_path_mode7 ()">vips_path_mode7</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libvips-basic.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="typedef_keyword">typedef</td>
<td class="function_name"><a class="link" href="libvips-basic.html#VipsPel" title="VipsPel">VipsPel</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libvips-basic.html#VipsPrecision" title="enum VipsPrecision">VipsPrecision</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libvips-basic.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <vips/vips.h>
</pre>
</div>
<div class="refsect1">
<a name="libvips-basic.description"></a><h2>Description</h2>
<p>A few simple typedefs used by VIPS.</p>
</div>
<div class="refsect1">
<a name="libvips-basic.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="VipsCallbackFn"></a><h3>VipsCallbackFn ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
<span class="c_punctuation">(</span>*VipsCallbackFn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsSListMap2Fn"></a><h3>VipsSListMap2Fn ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
<span class="c_punctuation">(</span>*VipsSListMap2Fn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *item</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsSListMap4Fn"></a><h3>VipsSListMap4Fn ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
<span class="c_punctuation">(</span>*VipsSListMap4Fn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *item</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>,
<em class="parameter"><code><span class="type">void</span> *c</code></em>,
<em class="parameter"><code><span class="type">void</span> *d</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsSListFold2Fn"></a><h3>VipsSListFold2Fn ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
<span class="c_punctuation">(</span>*VipsSListFold2Fn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *item</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>,
<em class="parameter"><code><span class="type">void</span> *c</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-path-filename7"></a><h3>vips_path_filename7 ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> *
vips_path_filename7 (<em class="parameter"><code>const <span class="type">char</span> *path</code></em>);</pre>
<p>Return the filename part of a vips7 path. For testing only.</p>
<div class="refsect3">
<a name="vips-path-filename7.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>path to split</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-path-mode7"></a><h3>vips_path_mode7 ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> *
vips_path_mode7 (<em class="parameter"><code>const <span class="type">char</span> *path</code></em>);</pre>
<p>Return the mode part of a vips7 path. For testing only.</p>
<div class="refsect3">
<a name="vips-path-mode7.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>path to split</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="libvips-basic.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="VipsPel"></a><h3>VipsPel</h3>
<pre class="programlisting">typedef unsigned char VipsPel;
</pre>
<p>A picture element. Cast this to whatever the associated VipsBandFormat says
to get the value.</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsPrecision"></a><h3>enum VipsPrecision</h3>
<p>How accurate an operation should be.</p>
<div class="refsect3">
<a name="VipsPrecision.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-PRECISION-INTEGER:CAPS"></a>VIPS_PRECISION_INTEGER</p></td>
<td class="enum_member_description">
<p>int everywhere</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-PRECISION-FLOAT:CAPS"></a>VIPS_PRECISION_FLOAT</p></td>
<td class="enum_member_description">
<p>float everywhere</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-PRECISION-APPROXIMATE:CAPS"></a>VIPS_PRECISION_APPROXIMATE</p></td>
<td class="enum_member_description">
<p>approximate integer output</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-PRECISION-LAST:CAPS"></a>VIPS_PRECISION_LAST</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
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