mirror of
https://github.com/sigmasternchen/php-doc-en
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1ebd03cac1
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@344605 c90b9560-bf6c-de11-be94-00142212c4b1
271 lines
7.9 KiB
XML
271 lines
7.9 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id='function.imagefttext' xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>imagefttext</refname>
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<refpurpose>Write text to the image using fonts using FreeType 2</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>array</type><methodname>imagefttext</methodname>
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<methodparam><type>resource</type><parameter>image</parameter></methodparam>
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<methodparam><type>float</type><parameter>size</parameter></methodparam>
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<methodparam><type>float</type><parameter>angle</parameter></methodparam>
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<methodparam><type>int</type><parameter>x</parameter></methodparam>
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<methodparam><type>int</type><parameter>y</parameter></methodparam>
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<methodparam><type>int</type><parameter>color</parameter></methodparam>
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<methodparam><type>string</type><parameter>fontfile</parameter></methodparam>
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<methodparam><type>string</type><parameter>text</parameter></methodparam>
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<methodparam choice="opt"><type>array</type><parameter>extrainfo</parameter></methodparam>
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</methodsynopsis>
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<note>
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<para>
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<function>imagefttext</function> is an extended variant of
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<function>imagettftext</function> which additionally supports the
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<parameter>extrainfo</parameter>.
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</para>
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</note>
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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>size</parameter></term>
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<listitem>
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<para>
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The font size to use in points.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>angle</parameter></term>
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<listitem>
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<para>
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The angle in degrees, with 0 degrees being left-to-right reading text.
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Higher values represent a counter-clockwise rotation. For example, a
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value of 90 would result in bottom-to-top reading text.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>x</parameter></term>
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<listitem>
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<para>
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The coordinates given by <parameter>x</parameter> and
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<parameter>y</parameter> will define the basepoint of the first
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character (roughly the lower-left corner of the character). This
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is different from the <function>imagestring</function>, where
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<parameter>x</parameter> and <parameter>y</parameter> define the
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upper-left corner of the first character. For example, "top left"
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is 0, 0.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>y</parameter></term>
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<listitem>
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<para>
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The y-ordinate. This sets the position of the fonts baseline, not the
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very bottom of the character.
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</para>
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</listitem>
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</varlistentry>
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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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The index of the desired color for the text, see
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<function>imagecolorexact</function>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>fontfile</parameter></term>
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<listitem>
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<para>
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The path to the TrueType font you wish to use.
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</para>
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<para>
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Depending on which version of the GD library PHP is using, <emphasis>when
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<parameter>fontfile</parameter> does not begin with a leading
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<literal>/</literal> then <literal>.ttf</literal> will be appended</emphasis>
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to the filename and the library will attempt to search for that
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filename along a library-defined font path.
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</para>
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<para>
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When using versions of the GD library lower than 2.0.18, a <literal>space</literal> character,
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rather than a semicolon, was used as the 'path separator' for different font files.
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Unintentional use of this feature will result in the warning message:
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<literal>Warning: Could not find/open font</literal>. For these affected versions, the
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only solution is moving the font to a path which does not contain spaces.
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</para>
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<para>
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In many cases where a font resides in the same directory as the script using it
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the following trick will alleviate any include problems.
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<programlisting role="php">
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<![CDATA[
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<?php
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// Set the enviroment variable for GD
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putenv('GDFONTPATH=' . realpath('.'));
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// Name the font to be used (note the lack of the .ttf extension)
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$font = 'SomeFont';
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?>
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]]>
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</programlisting>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>text</parameter></term>
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<listitem>
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<para>
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Text to be inserted into image.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>extrainfo</parameter></term>
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<listitem>
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<para>
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<table>
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<title>Possible array indexes for <parameter>extrainfo</parameter></title>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>Key</entry>
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<entry>Type</entry>
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<entry>Meaning</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><literal>linespacing</literal></entry>
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<entry><type>float</type></entry>
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<entry>Defines drawing linespacing</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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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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This function returns an array defining the four points of the box, starting in the lower left and moving counter-clockwise:
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<informaltable>
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<tgroup cols="2">
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<tbody>
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<row>
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<entry>0</entry>
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<entry>lower left x-coordinate</entry>
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</row>
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<row>
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<entry>1</entry>
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<entry>lower left y-coordinate</entry>
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</row>
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<row>
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<entry>2</entry>
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<entry>lower right x-coordinate</entry>
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</row>
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<row>
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<entry>3</entry>
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<entry>lower right y-coordinate</entry>
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</row>
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<row>
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<entry>4</entry>
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<entry>upper right x-coordinate</entry>
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</row>
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<row>
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<entry>5</entry>
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<entry>upper right y-coordinate</entry>
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</row>
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<row>
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<entry>6</entry>
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<entry>upper left x-coordinate</entry>
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</row>
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<row>
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<entry>7</entry>
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<entry>upper left y-coordinate</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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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>imagefttext</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 300x100 image
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$im = imagecreatetruecolor(300, 100);
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$red = imagecolorallocate($im, 0xFF, 0x00, 0x00);
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$black = imagecolorallocate($im, 0x00, 0x00, 0x00);
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// Make the background red
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imagefilledrectangle($im, 0, 0, 299, 99, $red);
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// Path to our ttf font file
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$font_file = './arial.ttf';
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// Draw the text 'PHP Manual' using font size 13
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imagefttext($im, 13, 0, 105, 55, $black, $font_file, 'PHP Manual');
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// Output image to the browser
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header('Content-Type: image/png');
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imagepng($im);
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imagedestroy($im);
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?>
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]]>
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</programlisting>
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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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¬e.freetype;
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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>imageftbbox</function></member>
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<member><function>imagettftext</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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