<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<appendix xml:id="image.constants" xmlns="http://docbook.org/ns/docbook">
 &reftitle.constants;
 &extension.constants;
 <variablelist>
  <varlistentry xml:id="constant.gd-version">
   <term>
    <constant>GD_VERSION</constant>
    (<type>string</type>)
   </term>
   <listitem>
    <simpara>
     The GD version PHP was compiled against.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.gd-major-version">
   <term>
    <constant>GD_MAJOR_VERSION</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     The GD major version PHP was compiled against.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.gd-minor-version">
   <term>
    <constant>GD_MINOR_VERSION</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     The GD minor version PHP was compiled against.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.gd-release-version">
   <term>
    <constant>GD_RELEASE_VERSION</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     The GD release version PHP was compiled against.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.gd-extra-version">
   <term>
    <constant>GD_EXTRA_VERSION</constant>
    (<type>string</type>)
   </term>
   <listitem>
    <simpara>
     The GD "extra" version (beta/rc..) PHP was compiled against.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.gd-bundled">
   <term>
    <constant>GD_BUNDLED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     When the bundled version of GD is used this is 1 otherwise 
     its set to 0.
    </simpara>
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-avif">
   <term>
    <constant>IMG_AVIF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
    <simpara>
     (Available as of PHP 8.1.0)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-bmp">
   <term>
    <constant>IMG_BMP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-gif">
   <term>
    <constant>IMG_GIF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-jpg">
   <term>
    <constant>IMG_JPG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-jpeg">
   <term>
    <constant>IMG_JPEG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
    <note>
     <para>
      This constant has the same value as <constant>IMG_JPG</constant>
     </para>
    </note>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-png">
   <term>
    <constant>IMG_PNG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-wbmp">
   <term>
    <constant>IMG_WBMP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-xpm">
   <term>
    <constant>IMG_XPM</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-webp">
   <term>
    <constant>IMG_WEBP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.types;
    <simpara>
     (Available as of PHP 7.0.10)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-webp-lossless">
   <term>
    <constant>IMG_WEBP_LOSSLESS</constant>
    (<type>int</type>)
   </term>
   <listitem>
    <simpara>
     (Available as of PHP 8.1.0)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-color-tiled">
   <term>
    <constant>IMG_COLOR_TILED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.color;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-color-styled">
   <term>
    <constant>IMG_COLOR_STYLED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.color;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-color-brushed">
   <term>
    <constant>IMG_COLOR_BRUSHED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.color;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-color-styledbrushed">
   <term>
    <constant>IMG_COLOR_STYLEDBRUSHED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.color;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-color-transparent">
   <term>
    <constant>IMG_COLOR_TRANSPARENT</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.color;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-affine-translate">
   <term>
    <constant>IMG_AFFINE_TRANSLATE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.affine;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-affine-scale">
   <term>
    <constant>IMG_AFFINE_SCALE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.affine;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-affine-rotate">
   <term>
    <constant>IMG_AFFINE_ROTATE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.affine;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-affine-shear-horizontal">
   <term>
    <constant>IMG_AFFINE_SHEAR_HORIZONTAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.affine;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-affine-shear-vertical">
   <term>
    <constant>IMG_AFFINE_SHEAR_VERTICAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.affine;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-arc-rounded">
   <term>
    <constant>IMG_ARC_ROUNDED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.arc;
    <note>
     <para>
      This constant has the same value as <constant>IMG_ARC_PIE</constant>
     </para>
    </note>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-arc-pie">
   <term>
    <constant>IMG_ARC_PIE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.arc;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-arc-chord">
   <term>
    <constant>IMG_ARC_CHORD</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.arc;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-arc-nofill">
   <term>
    <constant>IMG_ARC_NOFILL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.arc;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-arc-edged">
   <term>
    <constant>IMG_ARC_EDGED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.arc;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-gd2-raw">
   <term>
    <constant>IMG_GD2_RAW</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.gd2;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-gd2-compressed">
   <term>
    <constant>IMG_GD2_COMPRESSED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.gd2;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-effect-replace">
   <term>
    <constant>IMG_EFFECT_REPLACE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.effect;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-effect-alphablend">
   <term>
    <constant>IMG_EFFECT_ALPHABLEND</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.effect;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-effect-normal">
   <term>
    <constant>IMG_EFFECT_NORMAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.effect;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-effect-overlay">
   <term>
    <constant>IMG_EFFECT_OVERLAY</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.effect;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-effect-multiply">
   <term>
    <constant>IMG_EFFECT_MULTIPLY</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.effect;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-negate">
   <term>
    <constant>IMG_FILTER_NEGATE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-grayscale">
   <term>
    <constant>IMG_FILTER_GRAYSCALE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-brightness">
   <term>
    <constant>IMG_FILTER_BRIGHTNESS</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-contrast">
   <term>
    <constant>IMG_FILTER_CONTRAST</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-colorize">
   <term>
    <constant>IMG_FILTER_COLORIZE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-edgedetect">
   <term>
    <constant>IMG_FILTER_EDGEDETECT</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-gaussian-blur">
   <term>
    <constant>IMG_FILTER_GAUSSIAN_BLUR</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-selective-blur">
   <term>
    <constant>IMG_FILTER_SELECTIVE_BLUR</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-emboss">
   <term>
    <constant>IMG_FILTER_EMBOSS</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-mean-removal">
   <term>
    <constant>IMG_FILTER_MEAN_REMOVAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-smooth">
   <term>
    <constant>IMG_FILTER_SMOOTH</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-pixelate">
   <term>
    <constant>IMG_FILTER_PIXELATE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.img-filter-scatter">
   <term>
    <constant>IMG_FILTER_SCATTER</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.filter;
    <simpara>
     (Available as of PHP 7.4.0)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-gif">
   <term>
    <constant>IMAGETYPE_GIF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jpeg">
   <term>
    <constant>IMAGETYPE_JPEG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jpeg2000">
   <term>
    <constant>IMAGETYPE_JPEG2000</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-png">
   <term>
    <constant>IMAGETYPE_PNG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-swf">
   <term>
    <constant>IMAGETYPE_SWF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-psd">
   <term>
    <constant>IMAGETYPE_PSD</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-bmp">
   <term>
    <constant>IMAGETYPE_BMP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-wbmp">
   <term>
    <constant>IMAGETYPE_WBMP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-xbm">
   <term>
    <constant>IMAGETYPE_XBM</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-tiff-ii">
   <term>
    <constant>IMAGETYPE_TIFF_II</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-tiff-mm">
   <term>
    <constant>IMAGETYPE_TIFF_MM</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-iff">
   <term>
    <constant>IMAGETYPE_IFF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jb2">
   <term>
    <constant>IMAGETYPE_JB2</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jpc">
   <term>
    <constant>IMAGETYPE_JPC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jp2">
   <term>
    <constant>IMAGETYPE_JP2</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-jpx">
   <term>
    <constant>IMAGETYPE_JPX</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-swc">
   <term>
    <constant>IMAGETYPE_SWC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-ico">
   <term>
    <constant>IMAGETYPE_ICO</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-webp">
   <term>
    <constant>IMAGETYPE_WEBP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
    <simpara>
     (Available as of PHP 7.1.0)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.imagetype-avif">
   <term>
    <constant>IMAGETYPE_AVIF</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.type;
    <simpara>
     (Available as of PHP 8.1.0)
    </simpara>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-no-filter">
   <term>
    <constant>PNG_NO_FILTER</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-filter-none">
   <term>
    <constant>PNG_FILTER_NONE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-filter-sub">
   <term>
    <constant>PNG_FILTER_SUB</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-filter-up">
   <term>
    <constant>PNG_FILTER_UP</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-filter-avg">
   <term>
    <constant>PNG_FILTER_AVG</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-filter-paeth">
   <term>
    <constant>PNG_FILTER_PAETH</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.png-all-filters">
   <term>
    <constant>PNG_ALL_FILTERS</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.png-filter;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-flip-vertical">
   <term>
    <constant>IMG_FLIP_VERTICAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.flip;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-flip-horizontal">
   <term>
    <constant>IMG_FLIP_HORIZONTAL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.flip;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-flip-both">
   <term>
    <constant>IMG_FLIP_BOTH</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.flip;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bell">
   <term>
    <constant>IMG_BELL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bessel">
   <term>
    <constant>IMG_BESSEL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bilinear-fixed">
   <term>
    <constant>IMG_BILINEAR_FIXED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bicubic">
   <term>
    <constant>IMG_BICUBIC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bicubic-fixed">
   <term>
    <constant>IMG_BICUBIC_FIXED</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-blackman">
   <term>
    <constant>IMG_BLACKMAN</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-box">
   <term>
    <constant>IMG_BOX</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-bspline">
   <term>
    <constant>IMG_BSPLINE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-catmullrom">
   <term>
    <constant>IMG_CATMULLROM</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-gaussian">
   <term>
    <constant>IMG_GAUSSIAN</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-generalized-cubic">
   <term>
    <constant>IMG_GENERALIZED_CUBIC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-hermite">
   <term>
    <constant>IMG_HERMITE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-hamming">
   <term>
    <constant>IMG_HAMMING</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-hanning">
   <term>
    <constant>IMG_HANNING</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-mitchell">
   <term>
    <constant>IMG_MITCHELL</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-power">
   <term>
    <constant>IMG_POWER</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-quadratic">
   <term>
    <constant>IMG_QUADRATIC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-sinc">
   <term>
    <constant>IMG_SINC</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-nearest-neighbour">
   <term>
    <constant>IMG_NEAREST_NEIGHBOUR</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-weighted4">
   <term>
    <constant>IMG_WEIGHTED4</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

  <varlistentry xml:id="constant.img-triangle">
   <term>
    <constant>IMG_TRIANGLE</constant>
    (<type>int</type>)
   </term>
   <listitem>
    &gd.constants.interpolation;
   </listitem>
  </varlistentry>

 </variablelist>
</appendix>
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