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<h2><span class="refentrytitle"><a name="libvips-boolean.top_of_page"></a>boolean</span></h2>
<p>boolean — boolean algebra on images, bitshifts</p>
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<div class="refsect1">
<a name="libvips-boolean.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
</div>
<div class="refsynopsisdiv">
<a name="libvips-boolean.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <vips/vips.h>
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()">im_andimage</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-orimage" title="im_orimage ()">im_orimage</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-eorimage" title="im_eorimage ()">im_eorimage</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-andimage-vec" title="im_andimage_vec ()">im_andimage_vec</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-andimageconst" title="im_andimageconst ()">im_andimageconst</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-orimage-vec" title="im_orimage_vec ()">im_orimage_vec</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()">im_orimageconst</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-eorimage-vec" title="im_eorimage_vec ()">im_eorimage_vec</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-eorimageconst" title="im_eorimageconst ()">im_eorimageconst</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-shiftleft-vec" title="im_shiftleft_vec ()">im_shiftleft_vec</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-shiftleft" title="im_shiftleft ()">im_shiftleft</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-shiftright-vec" title="im_shiftright_vec ()">im_shiftright_vec</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);
<span class="returnvalue">int</span> <a class="link" href="libvips-boolean.html#im-shiftright" title="im_shiftright ()">im_shiftright</a> (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libvips-boolean.description"></a><h2>Description</h2>
<p>
These operations perform boolean operations, such as bitwise-and, on
every pixel in an image or pair of images.
They are useful for combining the results of
the relational and morphological functions.
All will work with
images of any type or any mixture of types, of any size and of any number
of bands.
</p>
<p>
For binary operations, if the number of bands differs, one of the images
must have one band. In this case, an n-band image is formed from the
one-band image by joining n copies of the one-band image together and then
the two n-band images are operated upon.
</p>
<p>
In the same way, for operations that take an array constant, such as
<a class="link" href="libvips-boolean.html#im-andimage-vec" title="im_andimage_vec ()"><code class="function">im_andimage_vec()</code></a>, you can mix single-element arrays or single-band images
freely.
</p>
<p>
If the images differ in size, the smaller image is enlarged to match the
larger by adding zero pixels along the bottom and right.
</p>
<p>
The output type is the same as the input type for integer types. Float and
complex types are cast to signed int.
</p>
<p>
You might think <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a> would be called "im_and", but that causes
problems when we try and make a C++ binding and drop the "im_" prefix.
</p>
</div>
<div class="refsect1">
<a name="libvips-boolean.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="im-andimage"></a><h3>im_andimage ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_andimage (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in1</code></em> & <em class="parameter"><code>in2</code></em> and writes the result to <em class="parameter"><code>out</code></em>.
The images may have any format. They may differ
in their number of bands, see above. They may differ in size, see above.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-orimage" title="im_orimage ()"><code class="function">im_orimage()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in1</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in2</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 2</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-orimage"></a><h3>im_orimage ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_orimage (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in1</code></em> | <em class="parameter"><code>in2</code></em> and writes the result to <em class="parameter"><code>out</code></em>.
The images may have any format. They may differ
in their number of bands, see above. They may differ in size, see above.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-eorimage" title="im_eorimage ()"><code class="function">im_eorimage()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in1</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in2</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 2</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-eorimage"></a><h3>im_eorimage ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_eorimage (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in1</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in2</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in1</code></em> ^ <em class="parameter"><code>in2</code></em> and writes the result to <em class="parameter"><code>out</code></em>.
The images may have any format. They may differ
in their number of bands, see above. They may differ in size, see above.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-eorimage-vec" title="im_eorimage_vec ()"><code class="function">im_eorimage_vec()</code></a>, <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in1</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in2</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 2</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-andimage-vec"></a><h3>im_andimage_vec ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_andimage_vec (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> & <em class="parameter"><code>c</code></em> (bitwise and of image pixels with array
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimage-vec" title="im_orimage_vec ()"><code class="function">im_orimage_vec()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>array length</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>array of constants</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-andimageconst"></a><h3>im_andimageconst ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_andimageconst (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> & <em class="parameter"><code>c</code></em> (bitwise and of image pixels with
constant
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimage-vec" title="im_orimage_vec ()"><code class="function">im_orimage_vec()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>constant</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-orimage-vec"></a><h3>im_orimage_vec ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_orimage_vec (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> | <em class="parameter"><code>c</code></em> (bitwise or of image pixels with array
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>array length</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>array of constants</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-orimageconst"></a><h3>im_orimageconst ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_orimageconst (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> | <em class="parameter"><code>c</code></em> (bitwise or of image pixels with
constant
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimage-vec" title="im_orimage_vec ()"><code class="function">im_orimage_vec()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>constant</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-eorimage-vec"></a><h3>im_eorimage_vec ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_eorimage_vec (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> ^ <em class="parameter"><code>c</code></em> (bitwise exclusive-or of image pixels
with array
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>array length</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>array of constants</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-eorimageconst"></a><h3>im_eorimageconst ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_eorimageconst (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">double</span> c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> ^ <em class="parameter"><code>c</code></em> (bitwise exclusive-or of image pixels
with
constant
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimage-vec" title="im_orimage_vec ()"><code class="function">im_orimage_vec()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span> 1</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>constant</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-shiftleft-vec"></a><h3>im_shiftleft_vec ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_shiftleft_vec (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> << <em class="parameter"><code>c</code></em> (left-shift by <em class="parameter"><code>c</code></em> bits
with array
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>array length</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>array of constants</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-shiftleft"></a><h3>im_shiftleft ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_shiftleft (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> << <em class="parameter"><code>n</code></em> (left-shift by <em class="parameter"><code>n</code></em> bits)
and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>constant</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-shiftright-vec"></a><h3>im_shiftright_vec ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_shiftright_vec (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code><span class="type">double</span> *c</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> << <em class="parameter"><code>c</code></em> (right-shift by <em class="parameter"><code>c</code></em> bits
with array
<em class="parameter"><code>c</code></em>) and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>array length</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>array of constants</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="im-shiftright"></a><h3>im_shiftright ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> im_shiftright (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>
This operation calculates <em class="parameter"><code>in</code></em> >> <em class="parameter"><code>n</code></em> (right-shift by <em class="parameter"><code>n</code></em> bits)
and writes the result to <em class="parameter"><code>out</code></em>.
</p>
<p>
See also: <a class="link" href="libvips-boolean.html#im-andimage" title="im_andimage ()"><code class="function">im_andimage()</code></a>, <a class="link" href="libvips-boolean.html#im-orimageconst" title="im_orimageconst ()"><code class="function">im_orimageconst()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>input <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>output <span class="type">IMAGE</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>constant</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="libvips-boolean.see-also"></a><h2>See Also</h2>
<a class="link" href="libvips-arithmetic.html" title="arithmetic">arithmetic</a>
</div>
</div>
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