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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glShaderSource">
    <info>
        <copyright>
            <year>2003-2005</year>
            <holder>3Dlabs Inc. Ltd.</holder>
        </copyright>
        <copyright>
            <year>2010-2014</year>
            <holder>Khronos Group</holder>
        </copyright>
    </info>
    <refmeta>
        <refentrytitle>glShaderSource</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glShaderSource</refname>
        <refpurpose>Replaces the source code in a shader object</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glShaderSource</function></funcdef>
                <paramdef>GLuint <parameter>shader</parameter></paramdef>
                <paramdef>GLsizei <parameter>count</parameter></paramdef>
                <paramdef>const GLchar **<parameter>string</parameter></paramdef>
                <paramdef>const GLint *<parameter>length</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 xml:id="parameters"><title>Parameters</title>
        <variablelist>
            <varlistentry>
                <term><parameter>shader</parameter></term>
                <listitem>
                    <para>Specifies the handle of the shader object
                    whose source code is to be replaced.</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><parameter>count</parameter></term>
                <listitem>
                    <para>Specifies the number of elements in the
                    <parameter>string</parameter> and
                    <parameter>length</parameter>
                    arrays.</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><parameter>string</parameter></term>
                <listitem>
                    <para>Specifies an array of pointers to strings
                    containing the source code to be loaded into the
                    shader.</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term><parameter>length</parameter></term>
                <listitem>
                    <para>Specifies an array of string lengths.</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 xml:id="description"><title>Description</title>
        <para><function>glShaderSource</function> sets the source code
        in <parameter>shader</parameter> to the source code in the array
        of strings specified by <parameter>string</parameter>. Any
        source code previously stored in the shader object is completely
        replaced. The number of strings in the array is specified by
        <parameter>count</parameter>. If <parameter>length</parameter>
        is <constant>NULL</constant>, each string is assumed to be null
        terminated. If <parameter>length</parameter> is a value other
        than <constant>NULL</constant>, it points to an array containing
        a string length for each of the corresponding elements of
        <parameter>string</parameter>. Each element in the
        <parameter>length</parameter> array may contain the length of
        the corresponding string (the null character is not counted as
        part of the string length) or a value less than 0 to indicate
        that the string is null terminated. The source code strings are
        not scanned or parsed at this time; they are simply copied into
        the specified shader object.</para>
    </refsect1>
    <refsect1 xml:id="notes"><title>Notes</title>
        <para>The GL copies the shader source code strings when
        <function>glShaderSource</function> is called, so an application
        may free its copy of the source code strings immediately after
        the function returns.</para>
    </refsect1>
    <refsect1 xml:id="errors"><title>Errors</title>
        <para><constant>GL_INVALID_VALUE</constant> is generated if
        <parameter>shader</parameter> is not a value generated by
        OpenGL.</para>

        <para><constant>GL_INVALID_OPERATION</constant> is generated if
        <parameter>shader</parameter> is not a shader object.</para>

        <para><constant>GL_INVALID_VALUE</constant> is generated if
        <parameter>count</parameter> is less than 0.</para>

    </refsect1>
    <refsect1 xml:id="associatedgets"><title>Associated Gets</title>
        <para><citerefentry><refentrytitle>glGetShaderiv</refentrytitle></citerefentry>
        with arguments <parameter>shader</parameter> and
        <constant>GL_SHADER_SOURCE_LENGTH</constant></para>

        <para><citerefentry><refentrytitle>glGetShaderSource</refentrytitle></citerefentry>
        with argument <parameter>shader</parameter></para>

        <para><citerefentry><refentrytitle>glIsShader</refentrytitle></citerefentry></para>
    </refsect1>
    <refsect1 xml:id="versions">
        <title>API Version Support</title>
        <informaltable>
            <tgroup cols="3" align="left">
                <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
                <tbody>
                    <row>
                        <entry>glShaderSource</entry>
                        <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='es20']/*)"/>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect1>
    <refsect1 xml:id="seealso"><title>See Also</title>
        <para><citerefentry><refentrytitle>glCompileShader</refentrytitle></citerefentry>,
        <citerefentry><refentrytitle>glCreateShader</refentrytitle></citerefentry>,
        <citerefentry><refentrytitle>glDeleteShader</refentrytitle></citerefentry></para>
    </refsect1>
    <refsect1 xml:id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
            Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
            This material may be distributed subject to the terms and conditions set forth in
            the Open Publication License, v 1.0, 8 June 1999.
            <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
        </para>
    </refsect1>
</refentry>
