mirror of
https://github.com/sigmasternchen/php-doc-en
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235f3d10c6
PHP 5.0.0 requires GD >= 2.0.4 anyway, so we can remove a lot of out-dated info. git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@339875 c90b9560-bf6c-de11-be94-00142212c4b1
136 lines
3.5 KiB
XML
136 lines
3.5 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.imagecolorexactalpha" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>imagecolorexactalpha</refname>
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<refpurpose>Get the index of the specified color + alpha</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>int</type><methodname>imagecolorexactalpha</methodname>
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<methodparam><type>resource</type><parameter>image</parameter></methodparam>
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<methodparam><type>int</type><parameter>red</parameter></methodparam>
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<methodparam><type>int</type><parameter>green</parameter></methodparam>
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<methodparam><type>int</type><parameter>blue</parameter></methodparam>
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<methodparam><type>int</type><parameter>alpha</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns the index of the specified color+alpha in the palette of the
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image.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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&gd.image.description;
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<varlistentry>
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<term><parameter>red</parameter></term>
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<listitem>
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<para>&gd.value.red;</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>green</parameter></term>
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<listitem>
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<para>&gd.value.green;</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>blue</parameter></term>
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<listitem>
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<para>&gd.value.blue;</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>alpha</parameter></term>
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<listitem>
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<para>
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A value between <literal>0</literal> and <literal>127</literal>.
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<literal>0</literal> indicates completely opaque while
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<literal>127</literal> indicates completely transparent.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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The colors parameters are integers between 0 and 255 or hexadecimals
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between 0x00 and 0xFF.
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns the index of the specified color+alpha in the palette of the
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image, or -1 if the color does not exist in the image's palette.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>
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<title>Get colors from the GD logo</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Setup an image
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$im = imagecreatefrompng('./gdlogo.png');
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$colors = Array();
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$colors[] = imagecolorexactalpha($im, 255, 0, 0, 0);
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$colors[] = imagecolorexactalpha($im, 0, 0, 0, 127);
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$colors[] = imagecolorexactalpha($im, 255, 255, 255, 55);
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$colors[] = imagecolorexactalpha($im, 100, 255, 52, 20);
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print_r($colors);
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// Free from memory
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imagedestroy($im);
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<screen>
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<![CDATA[
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Array
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(
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[0] => 16711680
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[1] => 2130706432
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[2] => 939524095
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[3] => 342163252
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)
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]]>
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</screen>
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</example>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>imagecolorclosestalpha</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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