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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297557 $ -->
<chapter xml:id="image.setup" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
&reftitle.setup;
<!-- {{{ Requirements -->
<section xml:id="image.requirements">
&reftitle.required;
<para>
If you have the <acronym>GD</acronym> library (available at <link
xlink:href="&url.gd;">&url.gd;</link>) you will also be able to create
and manipulate images.
</para>
<para>
The format of images you are able to manipulate depend on the
version of <acronym>GD</acronym> you install, and any other libraries
<acronym>GD</acronym> might need to access those image formats.
Versions of <acronym>GD</acronym> older than gd-1.6
support <acronym>GIF</acronym> format images, and do not support
<acronym>PNG</acronym>, where versions greater than gd-1.6 and less than
gd-2.0.28 support PNG, not GIF. <acronym>GIF</acronym>
support was re-enabled in gd-2.0.28.
<note>
<simpara>
Since PHP 4.3 there is a bundled version of the <acronym>GD</acronym>
lib. This bundled version has some additional features like alpha
blending, and should be used in preference to the external library
since its codebase is better maintained and more stable.
</simpara>
</note>
</para>
<!-- FIXME PHP_6 FIXME
<note>
<para>
Support for GD 1.x has been removed as of PHP 6.0.0, which requires GD
2.0.33 or later.
</para>
</note>
-->
<para>
You may wish to enhance <acronym>GD</acronym> to handle more image formats.
<table>
<title>Supported image formats</title>
<tgroup cols="3">
<thead>
<row>
<entry>Image format</entry>
<entry>Library to download</entry>
<entry>Notes</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>gif</literal></entry>
<entry></entry>
<entry>
Only supported in <acronym>GD</acronym> versions older than gd-1.6 and newer than
gd-2.0.28. <emphasis>Read-only
</emphasis> <acronym>GIF</acronym> support is available with PHP 4.3.0 and the bundled
GD-library. <emphasis>Write</emphasis> support is available since
PHP 4.3.9 and PHP 5.0.1.
</entry>
</row>
<row>
<entry><literal>jpeg-6b</literal></entry>
<entry><link xlink:href="&url.jpeg;">&url.jpeg;</link></entry>
<entry>
When building the jpeg-v6b library (prior to building PHP) you
must use the <option role="configure">--enable-shared</option>
option in the configure step. If you do not, you will receive
an error saying <literal>libjpeg.(a|so) not found</literal>
when you get to the configure step of building PHP.
</entry>
</row>
<row>
<entry><literal>png</literal></entry>
<entry><link xlink:href="&url.libpng;">&url.libpng;</link></entry>
<entry>
Only supported in <acronym>GD</acronym> versions greater than gd-1.6.
</entry>
</row>
<row>
<entry><literal>xpm</literal></entry>
<entry><link xlink:href="&url.libxpm;">&url.libxpm;</link></entry>
<entry>
It's likely you have this library already available, if your system
has an installed X-Environment.
</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
<para>
You may wish to enhance <acronym>GD</acronym> to deal with different fonts. The following
font libraries are supported:
<table>
<title>Supported font libraries</title>
<tgroup cols="3">
<thead>
<row>
<entry>Font library</entry>
<entry>Download</entry>
<entry>Notes</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>FreeType 1.x</literal></entry>
<entry><link xlink:href="&url.freetype;">&url.freetype;</link></entry>
<entry>&removed.php.future;</entry>
</row>
<row>
<entry><literal>FreeType 2</literal></entry>
<entry><link xlink:href="&url.freetype;">&url.freetype;</link></entry>
<entry></entry>
</row>
<row>
<entry><literal>T1lib</literal></entry>
<entry><link xlink:href="&url.t1lib;">&url.t1lib;</link>)</entry>
<entry>
Support for Postscript Type 1 fonts.
</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</section>
<!-- }}} -->
<!-- {{{ Installation -->
&reference.image.configure;
<!-- }}} -->
<!-- {{{ Configuration -->
&reference.image.ini;
<!-- }}} -->
<!-- {{{ Resources -->
<section xml:id="image.resources">
&reftitle.resources;
<para>
This extension defines two resource types: an image identifier and a font
identifier.
</para>
</section>
<!-- }}} -->
</chapter>
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