php-doc-en/reference/image/setup.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->

<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.
   <acronym>GIF</acronym> support is available as of gd-2.0.28.
   <note>
    <simpara>
     As of PHP 5.0 libgd-2.0.4 or higher is required.
     As of PHP 5.5 libgd-2.1.0 or higher is required. Alternatively, use
     the bundled <acronym>GD</acronym> library that ships with PHP.
    </simpara>
   </note>
  </para>
  <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 newer than
        gd-2.0.28. <emphasis>Write</emphasis> support is available as of
        PHP 5.0.1.
       </entry>
      </row>
      <row>
       <entry><literal>jpeg</literal></entry>
       <entry><link xlink:href="&url.jpeg;">&url.jpeg;</link></entry>
       <entry>
        When building the jpeg 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>
       </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>Support for FreeType 1.x has been removed as of PHP 5.3.0.</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 (Removed as of PHP 7.0.0).
       </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 the following resource types:
   <table>
   <title>List of resource types in GD</title>
    <tgroup cols="3">
     <thead>
      <row>
       <entry>Name</entry>
       <entry>Description</entry>
       <entry>Notes</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry><literal>gd</literal></entry>
       <entry>Image resource, used by functions like <function>imagecreatefrompng</function></entry>
       <entry></entry>
      </row>
      <row>
       <entry><literal>gd font</literal></entry>
       <entry>Font resource returned by <function>imageloadfont</function></entry>
       <entry></entry>
      </row>
      <row>
       <entry><literal>gd PS font</literal></entry>
       <entry>PostScript Type 1 font resource, returned by <function>imagepsloadfont</function></entry>
       <entry>
        Removed as of PHP 7.0.0.
       </entry>
      </row>
      <row>
       <entry><literal>gd PS encoding</literal></entry>
       <entry>PostScript Type 1 encoding resource, returned by <function>imagepsencodefont</function></entry>
       <entry>
        Removed as of PHP 7.0.0.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </table>
  </para>
 </section>
 <!-- }}} -->

</chapter>

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