<?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-tga">

<term>

<constant>IMG_TGA</constant>

(<type>int</type>)

</term>

<listitem>

&gd.constants.types;

<simpara>

(Available as of PHP 7.4.0)

</simpara>

</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.imagetype-unknown">

<term>

<constant>IMAGETYPE_UNKNOWN</constant>

(<type>int</type>)

</term>

<listitem>

&gd.constants.type;

</listitem>

</varlistentry>

<varlistentry xml:id="constant.imagetype-count">

<term>

<constant>IMAGETYPE_COUNT</constant>

(<type>int</type>)

</term>

<listitem>

<simpara>

The number of image type constants (including the "unknown" type)

supported by the <function>image_type_to_mime_type</function> and <function>image_type_to_extension</function> functions

</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>