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<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
<!-- Converted by db4-upgrade version 1.1 -->
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glGetShaderSource">
<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>glGetShaderSource</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glGetShaderSource</refname>
<refpurpose>Returns the source code string from a shader object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glGetShaderSource</function></funcdef>
<paramdef>GLuint <parameter>shader</parameter></paramdef>
<paramdef>GLsizei <parameter>bufSize</parameter></paramdef>
<paramdef>GLsizei *<parameter>length</parameter></paramdef>
<paramdef>GLchar *<parameter>source</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>shader</parameter></term>
<listitem>
<para>Specifies the shader object to be
queried.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>bufSize</parameter></term>
<listitem>
<para>Specifies the size of the character buffer for
storing the returned source code string.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>length</parameter></term>
<listitem>
<para>Returns the length of the string returned in
<parameter>source</parameter> (excluding the null
terminator).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>source</parameter></term>
<listitem>
<para>Specifies an array of characters that is used
to return the source code string.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para><function>glGetShaderSource</function> returns the
concatenation of the source code strings from the shader object
specified by <parameter>shader</parameter>. The source code
strings for a shader object are the result of a previous call to
<citerefentry><refentrytitle>glShaderSource</refentrytitle></citerefentry>.
The string returned by the function will be null
terminated.</para>
<para><function>glGetShaderSource</function> returns in
<parameter>source</parameter> as much of the source code string
as it can, up to a maximum of <parameter>bufSize</parameter>
characters. The number of characters actually returned,
excluding the null termination character, is specified by
<parameter>length</parameter>. If the length of the returned
string is not required, a value of <constant>NULL</constant> can
be passed in the <parameter>length</parameter> argument. The
size of the buffer required to store the returned source code
string can be obtained by calling
<citerefentry><refentrytitle>glGetShader</refentrytitle></citerefentry>
with the value
<constant>GL_SHADER_SOURCE_LENGTH</constant>.</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>bufSize</parameter> is less than 0.</para>
</refsect1>
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
<para><citerefentry><refentrytitle>glGetShader</refentrytitle></citerefentry>
with argument
<constant>GL_SHADER_SOURCE_LENGTH</constant></para>
<para><citerefentry><refentrytitle>glIsShader</refentrytitle></citerefentry></para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glGetShaderSource</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='20']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para><citerefentry><refentrytitle>glCreateShader</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glShaderSource</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>
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