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<title>PREDICATES(3) manual page</title>
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<a href='#toc'>Table of Contents</a><p>
<h2><a name='sect0' href='#toc0'>Name</a></h2>
im_region_create, im_region_free - region creation and destruction
<h2><a name='sect1' href='#toc1'>Synopsis</a></h2>
<b>#include
<vips/vips.h></b>
<p> REGION *im_region_create( im ) <br>
IMAGE *im;
<p> int im_region_free( reg ) <br>
REGION *reg;
<h2><a name='sect2' href='#toc2'>Description</a></h2>
These functions create and destroy regions on images.
Regions are used for PIO, see accompanying documentation. Regions have type
<p> typedef struct {<br>
Rect valid /* Area of im represented */<br>
IMAGE *im; /* im we are defined on */<br>
<p> ... more fields, all private and used for<br>
... housekeeping<br>
} REGION;<br>
<p> <a href='im_region_create.3.html'>im_region_create(3)</a>
returns a pointer to a new region, or NULL on error.
Regions are made blank, with no input or output possible. See <a href='im_prepare.3.html'>im_prepare(3)</a>
,
<a href='im_generate.3.html'>im_generate(3)</a>
, <a href='im_start_one.3.html'>im_start_one(3)</a>
and <a href='IM_REGION_ADDR.3.html'>IM_REGION_ADDR(3)</a>
.
<p> <a href='im_region_free.3.html'>im_region_free(3)</a>
frees a region and any resources associated with that region. When an image
is closed, all regions which have been created on that image are automatically
freed.
<h2><a name='sect3' href='#toc3'>Return Value</a></h2>
All int-valued functions return zero on success and non-zero
on error.
<h2><a name='sect4' href='#toc4'>Copyright</a></h2>
National Gallery, 1993
<h2><a name='sect5' href='#toc5'>Author</a></h2>
J. Cupitt - 23/7/93 <p>
<hr><p>
<a name='toc'><b>Table of Contents</b></a><p>
<ul>
<li><a name='toc0' href='#sect0'>Name</a></li>
<li><a name='toc1' href='#sect1'>Synopsis</a></li>
<li><a name='toc2' href='#sect2'>Description</a></li>
<li><a name='toc3' href='#sect3'>Return Value</a></li>
<li><a name='toc4' href='#sect4'>Copyright</a></li>
<li><a name='toc5' href='#sect5'>Author</a></li>
</ul>
</body>
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distrib
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Mandriva
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2010.0
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i586
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media
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contrib-release
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by-pkgid
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c109337651527e96d7bb9adc83c5b18a
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files
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491
