Opentk/Source/Bind/Specifications/Docs/ES20/glHint.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
              "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
<refentry id="glHint">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>1991-2006</year>
                <holder>Silicon Graphics, Inc.</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glHint</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glHint</refname>
        <refpurpose>specify implementation-specific hints</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glHint</function></funcdef>
                <paramdef>GLenum <parameter>target</parameter></paramdef>
                <paramdef>GLenum <parameter>mode</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>target</parameter></term>
            <listitem>
                <para>
                    Specifies a symbolic constant indicating the behavior to be controlled.
                    <constant>GL_GENERATE_MIPMAP_HINT</constant> is accepted.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>mode</parameter></term>
            <listitem>
                <para>
                    Specifies a symbolic constant indicating the desired behavior.
                    <constant>GL_FASTEST</constant>,
                    <constant>GL_NICEST</constant>, and
                    <constant>GL_DONT_CARE</constant> are accepted.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            Certain aspects of GL behavior,
            when there is room for interpretation,
            can be controlled with hints.
            A hint is specified with two arguments.
            <parameter>target</parameter> is a symbolic
            constant indicating the behavior to be controlled,
            and <parameter>mode</parameter> is another symbolic constant indicating the desired
            behavior. The initial value for each <parameter>target</parameter> is <constant>GL_DONT_CARE</constant>.
            <parameter>mode</parameter> can be one of the following:
        </para>
        <variablelist>
            <varlistentry>
                <term><constant>GL_FASTEST</constant></term>
                <listitem>
                    <para>
                        The most efficient option should be chosen.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_NICEST</constant></term>
                <listitem>
                    <para>
                        The most correct,
                        or highest quality,
                        option should be chosen.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><constant>GL_DONT_CARE</constant></term>
                <listitem>
                    <para>
                        No preference.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
        <para>
            Though the implementation aspects that can be hinted are well defined,
            the interpretation of the hints depends on the implementation.
            The hint aspects that can be specified with <parameter>target</parameter>,
            along with suggested semantics,
            are as follows:
        </para>
        <variablelist>
            <varlistentry>
                <term><constant>GL_GENERATE_MIPMAP_HINT</constant></term>
                <listitem>
                    <para>
                        Indicates the quality of filtering when generating mipmap images with
                        <citerefentry><refentrytitle>glGenerateMipmap</refentrytitle></citerefentry>.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="notes"><title>Notes</title>
        <para>
            The interpretation of hints depends on the implementation.
            Some implementations ignore <function>glHint</function> settings.
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if either <parameter>target</parameter> or <parameter>mode</parameter> is not
            an accepted value.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
	<para><citerefentry><refentrytitle>glGenerateMipmap</refentrytitle></citerefentry></para>
    </refsect1>
    <refsect1 id="copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"></trademark> 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
        </para>
    </refsect1>
</refentry>