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=
"gl_LocalInvocationID">
9 <holder>Khronos Group
</holder>
12 <refentrytitle>gl_GlobalInvocationID
</refentrytitle>
13 <manvolnum>3G
</manvolnum>
16 <refname>gl_GlobalInvocationID
</refname>
17 <refpurpose>contains the global index of work item currently being operated on by a compute shader
</refpurpose>
19 <refsynopsisdiv><title>Declaration
</title>
21 <function>in uvec3 gl_GlobalInvocationID
</function>
24 <refsect1 id=
"description"><title>Description
</title>
26 In the compute language,
<function>gl_GlobalInvocationID
</function>
27 is a derived input variable containing the n-dimensional index of the
28 work invocation within the global work group that the current shader is
29 executing on. The value of
<function>gl_GlobalInvocationID
</function> is equal to
30 <function>gl_WorkGroupID
</function> *
<function>gl_WorkGroupSize
</function> +
<function>gl_LocalInvocationID
</function>.
33 <refsect1 id=
"versions"><title>Version Support
</title>
34 <informaltable frame=
"topbot">
39 <entry>gl_GlobalInvocationID
</entry>#newin43#
45 <refsect1 id=
"seealso"><title>See Also
</title>
47 <citerefentry><refentrytitle>gl_NumWorkGroups
</refentrytitle></citerefentry>,
48 <citerefentry><refentrytitle>gl_WorkGroupID
</refentrytitle></citerefentry>,
49 <citerefentry><refentrytitle>gl_WorkGroupSize
</refentrytitle></citerefentry>,
50 <citerefentry><refentrytitle>gl_LocalInvocationID
</refentrytitle></citerefentry>
53 <refsect1 id=
"Copyright"><title>Copyright
</title>
55 Copyright
<trademark class=
"copyright"></trademark> 2011-
2012 Khronos Group.
56 This material may be distributed subject to the terms and conditions set forth in
57 the Open Publication License, v
1.0,
8 June
1999.
58 <ulink url=
"http://opencontent.org/openpub/">http://opencontent.org/openpub/
</ulink>.