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https://github.com/sigmasternchen/php-doc-en
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0cac5f6eb9
* imagecolortransparent * imagefilledrectangle * Alternative to deprecated function imagedashedline Also changed dashedline.png to imagedashedline.png so all figures are named image* git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@265143 c90b9560-bf6c-de11-be94-00142212c4b1
115 lines
3 KiB
XML
115 lines
3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.12 $ -->
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<refentry xml:id="function.imagecolortransparent" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>imagecolortransparent</refname>
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<refpurpose>Define a color as transparent</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>imagecolortransparent</methodname>
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<methodparam><type>resource</type><parameter>image</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>color</parameter></methodparam>
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</methodsynopsis>
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<para>
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Sets the transparent color in the given <parameter>image</parameter>.
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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>color</parameter></term>
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<listitem>
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<para>
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A color identifier created with
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<function>imagecolorallocate</function>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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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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The identifier of the new (or current, if none is specified)
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transparent color is returned.
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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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<para>
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<example>
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<title><function>imagecolortransparent</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Create a 55x30 image
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$im = imagecreatetruecolor(55, 30);
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$red = imagecolorallocate($im, 255, 0, 0);
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$black = imagecolorallocate($im, 0, 0, 0);
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// Make the background transparent
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imagecolortransparent($im, $black);
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// Draw a red rectangle
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imagefilledrectangle($im, 4, 4, 50, 25, $red);
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// Save the image
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imagepng($im, './imagecolortransparent.png');
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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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<mediaobject>
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<imageobject>
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<imagedata fileref="figures/image.imagecolortransparent.png"/>
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</imageobject>
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</mediaobject>
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</example>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<para>
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Transparency is copied only with <function>imagecopymerge</function> and
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true color images, not with <function>imagecopy</function> or pallete images.
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</para>
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</note>
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<note>
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<para>
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The transparent color is a property of the image, transparency is not a
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property of the color. Once you have set a color to be the transparent
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color, any regions of the image in that color that were drawn previously
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will be transparent.
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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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