[clinton/guile-figl.git] / upstream-doc / man4 / glGetProgramInterface.xml

<?xml version="1.0" encoding="UTF-8"?>\r
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"\r
              "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">\r
<refentry id="glGetProgramInterface">\r
    <refmeta>\r
        <refmetainfo>\r
            <copyright>\r
                <year>2012</year>\r
                <holder>Khronos Group</holder>\r
            </copyright>\r
        </refmetainfo>\r
        <refentrytitle>glGetProgramInterface</refentrytitle>\r
        <manvolnum>3G</manvolnum>\r
    </refmeta>\r
    <refnamediv>\r
        <refname>glGetProgramInterface</refname>\r
        <refpurpose>query a property of an interface in a program</refpurpose>\r
    </refnamediv>\r
    <refsynopsisdiv><title>C Specification</title>\r
        <funcsynopsis>\r
            <funcprototype>\r
                <funcdef>void <function>glGetProgramInterfaceiv</function></funcdef>\r
                <paramdef>GLuint <parameter>program</parameter></paramdef>\r
                <paramdef>GLenum <parameter>programInterface</parameter></paramdef>\r
                <paramdef>GLenum <parameter>pname</parameter></paramdef>\r
                <paramdef>GLint * <parameter>params</parameter></paramdef>\r
            </funcprototype>\r
        </funcsynopsis>\r
    </refsynopsisdiv>\r
    <refsect1 id="parameters"><title>Parameters</title>\r
        <variablelist>\r
        <varlistentry>\r
            <term><parameter>program</parameter></term>\r
            <listitem>\r
                <para>\r
                    The name of a program object whose interface to query.\r
                </para>\r
            </listitem>\r
        </varlistentry>\r
        <varlistentry>\r
            <term><parameter>programInterface</parameter></term>\r
            <listitem>\r
                <para>\r
                    A token identifying the interface within <parameter>program</parameter> to query.\r
                </para>\r
            </listitem>\r
        </varlistentry>\r
        <varlistentry>\r
            <term><parameter>pname</parameter></term>\r
            <listitem>\r
                <para>\r
                    The name of the parameter within <parameter>programInterface</parameter> to query.\r
                </para>\r
            </listitem>\r
        </varlistentry>\r
        <varlistentry>\r
            <term><parameter>params</parameter></term>\r
            <listitem>\r
                <para>\r
                    The address of a variable to retrieve the value of <parameter>pname</parameter> for the program interface.\r
                </para>\r
            </listitem>\r
        </varlistentry>\r
        </variablelist>\r
    </refsect1>\r
    <refsect1 id="description"><title>Description</title>\r
        <para>\r
            <function>glGetProgramInterfaceiv</function> queries the property of the interface identifed\r
            by <parameter>programInterface</parameter> in <parameter>program</parameter>, the property name of\r
            which is given by <parameter>pname</parameter>.\r
        </para>\r
        <para>\r
            <parameter>program</parameter> must be the name of an existing program object. <parameter>programInterface</parameter>\r
            is the name of the interface within <parameter>program</parameter> to query and must be one of the following\r
            values:\r
        </para>\r
        <variablelist>\r
            <varlistentry>\r
                <term><constant>GL_UNIFORM</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active uniforms within <parameter>program</parameter>.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_UNIFORM_BLOCK</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active uniform blocks within <parameter>program</parameter>.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_ATOMIC_COUNTER_BUFFER</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active atomic counter buffer binding points within <parameter>program</parameter>.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_PROGRAM_INPUT</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active input variables used by the first shader stage of <parameter>program</parameter>.\r
                        If <parameter>program</parameter> contains multiple shader stages then input variables from any stage other than the first\r
                        will not be enumerated.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_PROGRAM_OUTPUT</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active output variables produced by the last shader stage of <parameter>program</parameter>.\r
                        If <parameter>program</parameter> contains multiple shader stages then output variables from any stage other than the last\r
                        will not be enumerated.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_VERTEX_SUBROUTINE</constant></term>,\r
                <term><constant>GL_TESS_CONTROL_SUBROUTINE</constant></term>,\r
                <term><constant>GL_TESS_EVALUATION_SUBROUTINE</constant></term>,\r
                <term><constant>GL_GEOMETRY_SUBROUTINE</constant></term>,\r
                <term><constant>GL_FRAGMENT_SUBROUTINE</constant></term>,\r
                <term><constant>GL_COMPUTE_SUBROUTINE</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active subroutines for the vertex, tessellation control, tessellation evaluation,\r
                        geometry, fragment and compute shader stages of <parameter>program</parameter>, respectively.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_VERTEX_SUBROUTINE_UNIFORM</constant></term>,\r
                <term><constant>GL_TESS_CONTROL_SUBROUTINE_UNIFORM</constant></term>,\r
                <term><constant>GL_TESS_EVALUATION_SUBROUTINE_UNIFORM</constant></term>,\r
                <term><constant>GL_GEOMETRY_SUBROUTINE_UNIFORM</constant></term>,\r
                <term><constant>GL_FRAGMENT_SUBROUTINE_UNIFORM</constant></term>,\r
                <term><constant>GL_COMPUTE_SUBROUTINE_UNIFORM</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active subroutine uniform variables used by the vertex, tessellation control, tessellation evaluation,\r
                        geometry, fragment and compute shader stages of <parameter>program</parameter>, respectively.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_TRANSFORM_FEEDBACK_VARYING</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of output variables from the last non-fragment stage of <parameter>program</parameter> that would be\r
                        captured if transform feedback were active.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_BUFFER_VARIABLE</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active buffer variables used by <parameter>program</parameter>.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
            <varlistentry>\r
                <term><constant>GL_SHADER_STORAGE_BLOCK</constant></term>\r
                <listitem>\r
                    <para>\r
                        The query is targeted at the set of active shader storage blocks used by <parameter>program</parameter>.\r
                    </para>\r
                </listitem>\r
            </varlistentry>\r
        </variablelist>\r
        <para>\r
            <parameter>pname</parameter> identifies the property of <parameter>programInterface</parameter>\r
            to return in <parameter>params</parameter>.\r
        </para>\r
        <para>\r
            If <parameter>pname</parameter> is <constant>GL_ACTIVE_RESOURCES</constant>, the value returned is the number of\r
            resources in the active resource list for <parameter>programInterface</parameter>.  If the list\r
            of active resources for <parameter>programInterface</parameter> is empty, zero is returned.\r
        </para>\r
        <para>\r
            If <parameter>pname</parameter> is <constant>GL_MAX_NAME_LENGTH</constant>, the value returned is the length of the\r
            longest active name string for an active resource in <parameter>programInterface</parameter>.\r
            This length includes an extra character for the null terminator.  If the\r
            list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
            returned.  It is an error to specify <constant>GL_MAX_NAME_LENGTH</constant> when <parameter>programInterface</parameter>\r
            is <constant>GL_ATOMIC_COUNTER_BUFFER</constant>, as active atomic counter buffer resources are\r
            not assigned name strings.\r
        </para>\r
        <para>\r
            If <parameter>pname</parameter> is <constant>GL_MAX_NUM_ACTIVE_VARIABLES</constant>, the value returned is the number\r
            of active variables belonging to the interface block or atomic counter\r
            buffer resource in <parameter>programInterface</parameter> with the most active variables.  If\r
            the list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
            returned.  When <parameter>pname</parameter> is <constant>GL_MAX_NUM_ACTIVE_VARIABLES</constant>, <parameter>programInterface</parameter>\r
            must be <constant>GL_UNIFORM_BLOCK</constant>, <constant>GL_ATOMIC_COUNTER_BUFFER</constant>, or <constant>GL_SHADER_STORAGE_BLOCK</constant>.\r
        </para>\r
        <para>\r
            If <parameter>pname</parameter> is <constant>GL_MAX_NUM_COMPATIBLE_SUBROUTINES</constant>, the value returned is the\r
            number of compatible subroutines belonging to the active subroutine\r
            uniform in <parameter>programInterface</parameter> with the most compatible subroutines.  If\r
            the list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
            returned. When <parameter>pname</parameter> is <constant>GL_MAX_NUM_COMPATIBLE_SUBROUTINES</constant>,\r
            <parameter>programInterface</parameter> must be one of <constant>GL_VERTEX_SUBROUTINE_UNIFORM</constant>,\r
            <constant>GL_TESS_CONTROL_SUBROUTINE_UNIFORM</constant>, <constant>GL_TESS_EVALUATION_SUBROUTINE_UNIFORM</constant>,\r
            <constant>GL_GEOMETRY_SUBROUTINE_UNIFORM</constant>, <constant>GL_FRAGMENT_SUBROUTINE_UNIFORM</constant>, or\r
            <constant>GL_COMPUTE_SUBROUTINE_UNIFORM</constant>.\r
        </para>\r
    </refsect1>\r
    <refsect1 id="errors"><title>Errors</title>\r
        <para>\r
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>identifier</parameter>\r
            is not one of the accepted object types.\r
        </para>\r
        <para>\r
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>program</parameter>\r
            is not the name of an existing sync object.\r
        </para>\r
        <para>\r
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>bufSize</parameter> is\r
            zero.\r
        </para>\r
        <para>\r
            If not NULL, <parameter>length</parameter> and <parameter>label</parameter> should be addresses\r
            to which the client has write access, otherwise undefined behavior, including process termination\r
            may occur.\r
        </para>\r
    </refsect1>\r
    <refsect1 id="associatedgets"><title>Associated Gets</title>\r
        <para>\r
            <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MAX_LABEL_LENGTH</constant>.\r
        </para>\r
    </refsect1>\r
    <refsect1 id="seealso"><title>See Also</title>\r
        <para>\r
            <citerefentry><refentrytitle>glPushDebugGroup</refentrytitle></citerefentry>,\r
            <citerefentry><refentrytitle>glPopDebugGroup</refentrytitle></citerefentry>,\r
            <citerefentry><refentrytitle>glObjectLabel</refentrytitle></citerefentry>,\r
            <citerefentry><refentrytitle>glGetObjectLabel</refentrytitle></citerefentry>.\r
        </para>\r
    </refsect1>\r
    <refsect1 id="Copyright"><title>Copyright</title>\r
        <para>\r
            Copyright <trademark class="copyright"></trademark> 2012 Khronos Group. \r
            This material may be distributed subject to the terms and conditions set forth in \r
            the Open Publication License, v 1.0, 8 June 1999.\r
            <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.\r
        </para>\r
    </refsect1>\r
</refentry>\r
Commit	Line	Data
7faf1d71 AW	1	<?xml version="1.0" encoding="UTF-8"?>\r
	2	<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"\r
	3	"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">\r
	4	<refentry id="glGetProgramInterface">\r
	5	<refmeta>\r
	6	<refmetainfo>\r
	7	<copyright>\r
	8	<year>2012</year>\r
	9	<holder>Khronos Group</holder>\r
	10	</copyright>\r
	11	</refmetainfo>\r
	12	<refentrytitle>glGetProgramInterface</refentrytitle>\r
	13	<manvolnum>3G</manvolnum>\r
	14	</refmeta>\r
	15	<refnamediv>\r
	16	<refname>glGetProgramInterface</refname>\r
	17	<refpurpose>query a property of an interface in a program</refpurpose>\r
	18	</refnamediv>\r
	19	<refsynopsisdiv><title>C Specification</title>\r
	20	<funcsynopsis>\r
	21	<funcprototype>\r
	22	<funcdef>void <function>glGetProgramInterfaceiv</function></funcdef>\r
	23	<paramdef>GLuint <parameter>program</parameter></paramdef>\r
	24	<paramdef>GLenum <parameter>programInterface</parameter></paramdef>\r
	25	<paramdef>GLenum <parameter>pname</parameter></paramdef>\r
	26	<paramdef>GLint * <parameter>params</parameter></paramdef>\r
	27	</funcprototype>\r
	28	</funcsynopsis>\r
	29	</refsynopsisdiv>\r
	30	<refsect1 id="parameters"><title>Parameters</title>\r
	31	<variablelist>\r
	32	<varlistentry>\r
	33	<term><parameter>program</parameter></term>\r
	34	<listitem>\r
	35	<para>\r
	36	The name of a program object whose interface to query.\r
	37	</para>\r
	38	</listitem>\r
	39	</varlistentry>\r
	40	<varlistentry>\r
	41	<term><parameter>programInterface</parameter></term>\r
	42	<listitem>\r
	43	<para>\r
	44	A token identifying the interface within <parameter>program</parameter> to query.\r
	45	</para>\r
	46	</listitem>\r
	47	</varlistentry>\r
	48	<varlistentry>\r
	49	<term><parameter>pname</parameter></term>\r
	50	<listitem>\r
	51	<para>\r
	52	The name of the parameter within <parameter>programInterface</parameter> to query.\r
	53	</para>\r
	54	</listitem>\r
	55	</varlistentry>\r
	56	<varlistentry>\r
	57	<term><parameter>params</parameter></term>\r
	58	<listitem>\r
	59	<para>\r
	60	The address of a variable to retrieve the value of <parameter>pname</parameter> for the program interface.\r
	61	</para>\r
	62	</listitem>\r
	63	</varlistentry>\r
	64	</variablelist>\r
65	</refsect1>\r
66	<refsect1 id="description"><title>Description</title>\r
67	<para>\r
68	<function>glGetProgramInterfaceiv</function> queries the property of the interface identifed\r
69	by <parameter>programInterface</parameter> in <parameter>program</parameter>, the property name of\r
70	which is given by <parameter>pname</parameter>.\r
71	</para>\r
72	<para>\r
73	<parameter>program</parameter> must be the name of an existing program object. <parameter>programInterface</parameter>\r
74	is the name of the interface within <parameter>program</parameter> to query and must be one of the following\r
75	values:\r
76	</para>\r
77	<variablelist>\r
78	<varlistentry>\r
79	<term><constant>GL_UNIFORM</constant></term>\r
80	<listitem>\r
81	<para>\r
82	The query is targeted at the set of active uniforms within <parameter>program</parameter>.\r
83	</para>\r
84	</listitem>\r
85	</varlistentry>\r
86	<varlistentry>\r
87	<term><constant>GL_UNIFORM_BLOCK</constant></term>\r
88	<listitem>\r
89	<para>\r
90	The query is targeted at the set of active uniform blocks within <parameter>program</parameter>.\r
91	</para>\r
92	</listitem>\r
93	</varlistentry>\r
94	<varlistentry>\r
95	<term><constant>GL_ATOMIC_COUNTER_BUFFER</constant></term>\r
96	<listitem>\r
97	<para>\r
98	The query is targeted at the set of active atomic counter buffer binding points within <parameter>program</parameter>.\r
99	</para>\r
100	</listitem>\r
101	</varlistentry>\r
102	<varlistentry>\r
103	<term><constant>GL_PROGRAM_INPUT</constant></term>\r
104	<listitem>\r
105	<para>\r
106	The query is targeted at the set of active input variables used by the first shader stage of <parameter>program</parameter>.\r
107	If <parameter>program</parameter> contains multiple shader stages then input variables from any stage other than the first\r
108	will not be enumerated.\r
109	</para>\r
110	</listitem>\r
111	</varlistentry>\r
112	<varlistentry>\r
113	<term><constant>GL_PROGRAM_OUTPUT</constant></term>\r
114	<listitem>\r
115	<para>\r
116	The query is targeted at the set of active output variables produced by the last shader stage of <parameter>program</parameter>.\r
117	If <parameter>program</parameter> contains multiple shader stages then output variables from any stage other than the last\r
118	will not be enumerated.\r
119	</para>\r
120	</listitem>\r
121	</varlistentry>\r
122	<varlistentry>\r
123	<term><constant>GL_VERTEX_SUBROUTINE</constant></term>,\r
124	<term><constant>GL_TESS_CONTROL_SUBROUTINE</constant></term>,\r
125	<term><constant>GL_TESS_EVALUATION_SUBROUTINE</constant></term>,\r
126	<term><constant>GL_GEOMETRY_SUBROUTINE</constant></term>,\r
127	<term><constant>GL_FRAGMENT_SUBROUTINE</constant></term>,\r
128	<term><constant>GL_COMPUTE_SUBROUTINE</constant></term>\r
129	<listitem>\r
130	<para>\r
131	The query is targeted at the set of active subroutines for the vertex, tessellation control, tessellation evaluation,\r
132	geometry, fragment and compute shader stages of <parameter>program</parameter>, respectively.\r
133	</para>\r
134	</listitem>\r
135	</varlistentry>\r
136	<varlistentry>\r
137	<term><constant>GL_VERTEX_SUBROUTINE_UNIFORM</constant></term>,\r
138	<term><constant>GL_TESS_CONTROL_SUBROUTINE_UNIFORM</constant></term>,\r
139	<term><constant>GL_TESS_EVALUATION_SUBROUTINE_UNIFORM</constant></term>,\r
140	<term><constant>GL_GEOMETRY_SUBROUTINE_UNIFORM</constant></term>,\r
141	<term><constant>GL_FRAGMENT_SUBROUTINE_UNIFORM</constant></term>,\r
142	<term><constant>GL_COMPUTE_SUBROUTINE_UNIFORM</constant></term>\r
143	<listitem>\r
144	<para>\r
145	The query is targeted at the set of active subroutine uniform variables used by the vertex, tessellation control, tessellation evaluation,\r
146	geometry, fragment and compute shader stages of <parameter>program</parameter>, respectively.\r
147	</para>\r
148	</listitem>\r
149	</varlistentry>\r
150	<varlistentry>\r
151	<term><constant>GL_TRANSFORM_FEEDBACK_VARYING</constant></term>\r
152	<listitem>\r
153	<para>\r
154	The query is targeted at the set of output variables from the last non-fragment stage of <parameter>program</parameter> that would be\r
155	captured if transform feedback were active.\r
156	</para>\r
157	</listitem>\r
158	</varlistentry>\r
159	<varlistentry>\r
160	<term><constant>GL_BUFFER_VARIABLE</constant></term>\r
161	<listitem>\r
162	<para>\r
163	The query is targeted at the set of active buffer variables used by <parameter>program</parameter>.\r
164	</para>\r
165	</listitem>\r
166	</varlistentry>\r
167	<varlistentry>\r
168	<term><constant>GL_SHADER_STORAGE_BLOCK</constant></term>\r
169	<listitem>\r
170	<para>\r
171	The query is targeted at the set of active shader storage blocks used by <parameter>program</parameter>.\r
172	</para>\r
173	</listitem>\r
174	</varlistentry>\r
175	</variablelist>\r
176	<para>\r
177	<parameter>pname</parameter> identifies the property of <parameter>programInterface</parameter>\r
178	to return in <parameter>params</parameter>.\r
179	</para>\r
180	<para>\r
181	If <parameter>pname</parameter> is <constant>GL_ACTIVE_RESOURCES</constant>, the value returned is the number of\r
182	resources in the active resource list for <parameter>programInterface</parameter>. If the list\r
183	of active resources for <parameter>programInterface</parameter> is empty, zero is returned.\r
184	</para>\r
185	<para>\r
186	If <parameter>pname</parameter> is <constant>GL_MAX_NAME_LENGTH</constant>, the value returned is the length of the\r
187	longest active name string for an active resource in <parameter>programInterface</parameter>.\r
188	This length includes an extra character for the null terminator. If the\r
189	list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
190	returned. It is an error to specify <constant>GL_MAX_NAME_LENGTH</constant> when <parameter>programInterface</parameter>\r
191	is <constant>GL_ATOMIC_COUNTER_BUFFER</constant>, as active atomic counter buffer resources are\r
192	not assigned name strings.\r
193	</para>\r
194	<para>\r
195	If <parameter>pname</parameter> is <constant>GL_MAX_NUM_ACTIVE_VARIABLES</constant>, the value returned is the number\r
196	of active variables belonging to the interface block or atomic counter\r
197	buffer resource in <parameter>programInterface</parameter> with the most active variables. If\r
198	the list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
199	returned. When <parameter>pname</parameter> is <constant>GL_MAX_NUM_ACTIVE_VARIABLES</constant>, <parameter>programInterface</parameter>\r
200	must be <constant>GL_UNIFORM_BLOCK</constant>, <constant>GL_ATOMIC_COUNTER_BUFFER</constant>, or <constant>GL_SHADER_STORAGE_BLOCK</constant>.\r
201	</para>\r
202	<para>\r
203	If <parameter>pname</parameter> is <constant>GL_MAX_NUM_COMPATIBLE_SUBROUTINES</constant>, the value returned is the\r
204	number of compatible subroutines belonging to the active subroutine\r
205	uniform in <parameter>programInterface</parameter> with the most compatible subroutines. If\r
206	the list of active resources for <parameter>programInterface</parameter> is empty, zero is\r
207	returned. When <parameter>pname</parameter> is <constant>GL_MAX_NUM_COMPATIBLE_SUBROUTINES</constant>,\r
208	<parameter>programInterface</parameter> must be one of <constant>GL_VERTEX_SUBROUTINE_UNIFORM</constant>,\r
209	<constant>GL_TESS_CONTROL_SUBROUTINE_UNIFORM</constant>, <constant>GL_TESS_EVALUATION_SUBROUTINE_UNIFORM</constant>,\r
210	<constant>GL_GEOMETRY_SUBROUTINE_UNIFORM</constant>, <constant>GL_FRAGMENT_SUBROUTINE_UNIFORM</constant>, or\r
211	<constant>GL_COMPUTE_SUBROUTINE_UNIFORM</constant>.\r
212	</para>\r
213	</refsect1>\r
214	<refsect1 id="errors"><title>Errors</title>\r
215	<para>\r
216	<constant>GL_INVALID_ENUM</constant> is generated if <parameter>identifier</parameter>\r
217	is not one of the accepted object types.\r
218	</para>\r
219	<para>\r
220	<constant>GL_INVALID_VALUE</constant> is generated if <parameter>program</parameter>\r
221	is not the name of an existing sync object.\r
222	</para>\r
223	<para>\r
224	<constant>GL_INVALID_VALUE</constant> is generated if <parameter>bufSize</parameter> is\r
225	zero.\r
226	</para>\r
227	<para>\r
228	If not NULL, <parameter>length</parameter> and <parameter>label</parameter> should be addresses\r
229	to which the client has write access, otherwise undefined behavior, including process termination\r
230	may occur.\r
231	</para>\r
232	</refsect1>\r
233	<refsect1 id="associatedgets"><title>Associated Gets</title>\r
234	<para>\r
235	<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MAX_LABEL_LENGTH</constant>.\r
236	</para>\r
237	</refsect1>\r
238	<refsect1 id="seealso"><title>See Also</title>\r
239	<para>\r
240	<citerefentry><refentrytitle>glPushDebugGroup</refentrytitle></citerefentry>,\r
241	<citerefentry><refentrytitle>glPopDebugGroup</refentrytitle></citerefentry>,\r
242	<citerefentry><refentrytitle>glObjectLabel</refentrytitle></citerefentry>,\r
243	<citerefentry><refentrytitle>glGetObjectLabel</refentrytitle></citerefentry>.\r
244	</para>\r
245	</refsect1>\r
246	<refsect1 id="Copyright"><title>Copyright</title>\r
247	<para>\r
248	Copyright <trademark class="copyright"></trademark> 2012 Khronos Group. \r
249	This material may be distributed subject to the terms and conditions set forth in \r
250	the Open Publication License, v 1.0, 8 June 1999.\r
251	<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.\r
252	</para>\r
253	</refsect1>\r
254	</refentry>\r