Commit | Line | Data |
---|---|---|
7faf1d71 AW |
1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> | |
4 | <refentry id="glGetUniformSubroutine"> | |
5 | <refmeta> | |
6 | <refmetainfo> | |
7 | <copyright> | |
8 | <year>2010</year> | |
9 | <holder>Khronos Group.</holder> | |
10 | </copyright> | |
11 | </refmetainfo> | |
12 | <refentrytitle>glGetUniformSubroutine</refentrytitle> | |
13 | <manvolnum>3G</manvolnum> | |
14 | </refmeta> | |
15 | <refnamediv> | |
16 | <refname>glGetUniformSubroutine</refname> | |
17 | <refpurpose>retrieve the value of a subroutine uniform of a given shader stage of the current program</refpurpose> | |
18 | </refnamediv> | |
19 | <refsynopsisdiv><title>C Specification</title> | |
20 | <funcsynopsis> | |
21 | <funcprototype> | |
22 | <funcdef>void <function>glGetUniformSubroutineuiv</function></funcdef> | |
23 | <paramdef>GLenum <parameter>shadertype</parameter></paramdef> | |
24 | <paramdef>GLint <parameter>location</parameter></paramdef> | |
25 | <paramdef>GLuint *<parameter>values</parameter></paramdef> | |
26 | </funcprototype> | |
27 | </funcsynopsis> | |
28 | </refsynopsisdiv> | |
29 | <!-- eqn: ignoring delim $$ --> | |
30 | <refsect1 id="parameters"><title>Parameters</title> | |
31 | <variablelist> | |
32 | <varlistentry> | |
33 | <term><parameter>shadertype</parameter></term> | |
34 | <listitem> | |
35 | <para> | |
36 | Specifies the shader stage from which to query for subroutine uniform index. | |
37 | <parameter>shadertype</parameter> | |
38 | must be one of <constant>GL_VERTEX_SHADER</constant>, <constant>GL_TESS_CONTROL_SHADER</constant>, | |
39 | <constant>GL_TESS_EVALUATION_SHADER</constant>, <constant>GL_GEOMETRY_SHADER</constant> or | |
40 | <constant>GL_FRAGMENT_SHADER</constant>. | |
41 | </para> | |
42 | </listitem> | |
43 | </varlistentry> | |
44 | <varlistentry> | |
45 | <term><parameter>location</parameter></term> | |
46 | <listitem> | |
47 | <para> | |
48 | Specifies the location of the subroutine uniform. | |
49 | </para> | |
50 | </listitem> | |
51 | </varlistentry> | |
52 | <varlistentry> | |
53 | <term><parameter>values</parameter></term> | |
54 | <listitem> | |
55 | <para> | |
56 | Specifies the address of a variable to receive the value or values of the subroutine uniform. | |
57 | </para> | |
58 | </listitem> | |
59 | </varlistentry> | |
60 | </variablelist> | |
61 | </refsect1> | |
62 | <refsect1 id="description"><title>Description</title> | |
63 | <para> | |
64 | <function>glGetUniformSubroutine</function> retrieves the value of the subroutine uniform at location | |
65 | <parameter>location</parameter> for shader stage <parameter>shadertype</parameter> of the current | |
66 | program. <parameter>location</parameter> must be less than the value of | |
67 | <constant>GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS</constant> for the shader currently in use at | |
68 | shader stage <parameter>shadertype</parameter>. The value of the subroutine uniform is returned in | |
69 | <parameter>values</parameter>. | |
70 | </para> | |
71 | </refsect1> | |
72 | <refsect1 id="errors"><title>Errors</title> | |
73 | <para> | |
74 | <constant>GL_INVALID_ENUM</constant> is generated if <parameter>shadertype</parameter> is not one of the accepted values. | |
75 | </para> | |
76 | <para> | |
77 | <constant>GL_INVALID_VALUE</constant> is generated if <parameter>location</parameter> is greater than or equal to | |
78 | the value of <constant>GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS</constant> for the shader currently in use at | |
79 | shader stage <parameter>shadertype</parameter>. | |
80 | </para> | |
81 | <para> | |
82 | <constant>GL_INVALID_OPERATION</constant> is generated if no program is active. | |
83 | </para> | |
84 | </refsect1> | |
85 | <refsect1 id="seealso"><title>See Also</title> | |
86 | <para> | |
87 | <citerefentry><refentrytitle>glGetProgram</refentrytitle></citerefentry>, | |
88 | <citerefentry><refentrytitle>glGetActiveSubroutineUniform</refentrytitle></citerefentry>, | |
89 | <citerefentry><refentrytitle>glGetActiveSubroutineUniformName</refentrytitle></citerefentry>, | |
90 | <citerefentry><refentrytitle>glGetUniformLocation</refentrytitle></citerefentry> | |
91 | </para> | |
92 | </refsect1> | |
93 | <refsect1 id="Copyright"><title>Copyright</title> | |
94 | <para> | |
95 | Copyright <trademark class="copyright"></trademark> 2010 Khronos Group. | |
96 | This material may be distributed subject to the terms and conditions set forth in | |
97 | the Open Publication License, v 1.0, 8 June 1999. | |
98 | <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>. | |
99 | </para> | |
100 | </refsect1> | |
101 | </refentry> |