mirror of
https://github.com/sigmasternchen/php-doc-en
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ce2e02e8b4
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@78672 c90b9560-bf6c-de11-be94-00142212c4b1
63 lines
2.3 KiB
XML
63 lines
2.3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<!-- splitted from ./en/functions/image.xml, last change in rev 1.34 -->
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<refentry id="function.imagetruecolortopalette">
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<refnamediv>
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<refname>imagetruecolortopalette</refname>
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<refpurpose>Convert a true color image to a palette image</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>void</type><methodname>imagetruecolortopalette</methodname>
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<methodparam><type>resource</type><parameter>image</parameter></methodparam>
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<methodparam><type>bool</type><parameter>dither</parameter></methodparam>
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<methodparam><type>int</type><parameter>ncolors</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>imagetruecolortopalette</function> converts a truecolor image
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to a palette image. The code for this function was originally drawn from
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the Independent JPEG Group library code, which is excellent. The code
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has been modified to preserve as much alpha channel information as
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possible in the resulting palette, in addition to preserving colors as
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well as possible. This does not work as well as might be hoped. It is
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usually best to simply produce a truecolor output image instead, which
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guarantees the highest output quality.
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</para>
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<para>
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<parameter>dither</parameter> indicates if the image should be dithered -
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if it is &true; then dithering will be used which will result in a more
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speckled image but with better color approximation.
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</para>
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<para>
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<parameter>ncolors</parameter> sets the maximum number of colors that
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should be retained in the palette.
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</para>
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<note>
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<para>
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This function was added in PHP 4.0.6 and requires GD 2.0.1 or later
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</para>
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</note>
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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:"../../../../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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