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Added example of how to use getPixelRegionIterator.

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335701 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Dan Ackroyd 2015-01-08 22:44:32 +00:00
parent 20d255c120
commit 7f56a87bce
1 changed files with 42 additions and 8 deletions
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50
reference/imagick/imagick/getpixelregioniterator.xml
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@ -5,7 +5,7 @@
<refname>Imagick::getPixelRegionIterator</refname>
<refpurpose>Get an ImagickPixelIterator for an image section</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
@ -19,7 +19,7 @@
Get an ImagickPixelIterator for an image section.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
@ -28,7 +28,7 @@
<term><parameter>x</parameter></term>
<listitem>
<para>
The x-coordinate of the region.
The x-coordinate of the region.
</para>
</listitem>
</varlistentry>
@ -36,7 +36,7 @@
<term><parameter>y</parameter></term>
<listitem>
<para>
The y-coordinate of the region.
The y-coordinate of the region.
</para>
</listitem>
</varlistentry>
@ -44,7 +44,7 @@
<term><parameter>columns</parameter></term>
<listitem>
<para>
The width of the region.
The width of the region.
</para>
</listitem>
</varlistentry>
@ -52,28 +52,62 @@
<term><parameter>rows</parameter></term>
<listitem>
<para>
The height of the region.
The height of the region.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an ImagickPixelIterator for an image section.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
&imagick.imagick.throws;
</para>
</refsect1>
<refsect1 role="examples"><!-- {{{ -->
&reftitle.examples;
<para>
<example xml:id="function-name.example.basic"><!-- {{{ -->
<title><function>Imagick::getPixelRegionIterator</function> example</title>
<para>
Iterate over the pixels in the top left of the image, changing every other one to be transparent black.
</para>
<programlisting role="php">
<![CDATA[
<?php
$im = new Imagick(realpath("./testImage.png"));
$areaIterator = $im->getPixelRegionIterator(0, 0, 10, 10);
foreach ($areaIterator as $rowIterator) {
foreach ($rowIterator as $pixel) {
if ($column % 2) {
// Paint every second pixel black
$pixel->setColor("rgba(0, 0, 0, 0)");
}
}
$areaIterator->syncIterator();
}
$im->writeImage("./output.png");
?>
]]>
</programlisting>
</example><!-- }}} -->
</para>
</refsect1><!-- }}} -->
</refentry>
<!-- Keep this comment at the end of the file