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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<refentry id="libgimp-gimpconvert">
<refmeta>
<refentrytitle role="top_of_page">gimpconvert</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>LIBGIMP Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>gimpconvert</refname>
<refpurpose>Conversions between RGB, indexed, and grayscale modes.</refpurpose>
<!--[<xref linkend="desc" endterm="desc.title"/>]-->
</refnamediv>
<refsynopsisdiv role="synopsis">
<title role="synopsis.title">Synopsis</title>
<synopsis>
<link linkend="gboolean">gboolean</link> <link linkend="gimp-image-convert-rgb">gimp_image_convert_rgb</link> (<link linkend="gint32">gint32</link> image_ID);
<link linkend="gboolean">gboolean</link> <link linkend="gimp-image-convert-grayscale">gimp_image_convert_grayscale</link> (<link linkend="gint32">gint32</link> image_ID);
<link linkend="gboolean">gboolean</link> <link linkend="gimp-image-convert-indexed">gimp_image_convert_indexed</link> (<link linkend="gint32">gint32</link> image_ID,
<link linkend="GimpConvertDitherType">GimpConvertDitherType</link> dither_type,
<link linkend="GimpConvertPaletteType">GimpConvertPaletteType</link> palette_type,
<link linkend="gint">gint</link> num_cols,
<link linkend="gboolean">gboolean</link> alpha_dither,
<link linkend="gboolean">gboolean</link> remove_unused,
const <link linkend="gchar">gchar</link> *palette);
</synopsis>
</refsynopsisdiv>
<refsect1 role="desc">
<title role="desc.title">Description</title>
<para>
Conversions between RGB, indexed, and grayscale modes.
</para>
</refsect1>
<refsect1 role="details">
<title role="details.title">Details</title>
<refsect2>
<title><anchor id="gimp-image-convert-rgb" role="function"/>gimp_image_convert_rgb ()</title>
<indexterm><primary>gimp_image_convert_rgb</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gimp_image_convert_rgb (<link linkend="gint32">gint32</link> image_ID);</programlisting>
<para>
Convert specified image to RGB color
</para>
<para>
This procedure converts the specified image to RGB color. This
process requires an image of type GIMP_GRAY or GIMP_INDEXED. No
image content is lost in this process aside from the colormap for an
indexed image.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>image_ID</parameter> :</term>
<listitem><simpara> The image.
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE on success.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="gimp-image-convert-grayscale" role="function"/>gimp_image_convert_grayscale ()</title>
<indexterm><primary>gimp_image_convert_grayscale</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gimp_image_convert_grayscale (<link linkend="gint32">gint32</link> image_ID);</programlisting>
<para>
Convert specified image to grayscale (256 intensity levels)
</para>
<para>
This procedure converts the specified image to grayscale with 8 bits
per pixel (256 intensity levels). This process requires an image of
type GIMP_RGB or GIMP_INDEXED.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>image_ID</parameter> :</term>
<listitem><simpara> The image.
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE on success.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="gimp-image-convert-indexed" role="function"/>gimp_image_convert_indexed ()</title>
<indexterm><primary>gimp_image_convert_indexed</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> gimp_image_convert_indexed (<link linkend="gint32">gint32</link> image_ID,
<link linkend="GimpConvertDitherType">GimpConvertDitherType</link> dither_type,
<link linkend="GimpConvertPaletteType">GimpConvertPaletteType</link> palette_type,
<link linkend="gint">gint</link> num_cols,
<link linkend="gboolean">gboolean</link> alpha_dither,
<link linkend="gboolean">gboolean</link> remove_unused,
const <link linkend="gchar">gchar</link> *palette);</programlisting>
<para>
Convert specified image to and Indexed image
</para>
<para>
This procedure converts the specified image to 'indexed' color. This
process requires an image of type GIMP_GRAY or GIMP_RGB. The
'palette_type' specifies what kind of palette to use, A type of '0'
means to use an optimal palette of 'num_cols' generated from the
colors in the image. A type of '1' means to re-use the previous
palette (not currently implemented). A type of '2' means to use the
so-called WWW-optimized palette. Type '3' means to use only black
and white colors. A type of '4' means to use a palette from the gimp
palettes directories. The 'dither type' specifies what kind of
dithering to use. '0' means no dithering, '1' means standard
Floyd-Steinberg error diffusion, '2' means Floyd-Steinberg error
diffusion with reduced bleeding, '3' means dithering based on pixel
location ('Fixed' dithering).</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>image_ID</parameter> :</term>
<listitem><simpara> The image.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>dither_type</parameter> :</term>
<listitem><simpara> The dither type to use.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>palette_type</parameter> :</term>
<listitem><simpara> The type of palette to use.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>num_cols</parameter> :</term>
<listitem><simpara> The number of colors to quantize to, ignored unless (palette_type == GIMP_MAKE_PALETTE).
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>alpha_dither</parameter> :</term>
<listitem><simpara> Dither transparency to fake partial opacity.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>remove_unused</parameter> :</term>
<listitem><simpara> Remove unused or duplicate colour entries from final palette, ignored if (palette_type == GIMP_MAKE_PALETTE).
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>palette</parameter> :</term>
<listitem><simpara> The name of the custom palette to use, ignored unless (palette_type == GIMP_CUSTOM_PALETTE).
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE on success.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
</refsect1>
</refentry>
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