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68 lines
3 KiB
XML
68 lines
3 KiB
XML
<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
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<!-- Converted by db4-upgrade version 1.1 -->
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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="gl_GlobalInvocationID">
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<info>
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<copyright>
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<year>2011-2014</year>
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<holder>Khronos Group</holder>
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</copyright>
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</info>
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<refmeta>
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<refentrytitle>gl_GlobalInvocationID</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>gl_GlobalInvocationID</refname>
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<refpurpose>contains the global index of work item currently being operated on by a compute shader</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<title>Declaration</title>
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<fieldsynopsis>
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<modifier>in</modifier>
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<type>uvec3</type>
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<varname>gl_GlobalInvocationID</varname>
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</fieldsynopsis>
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</refsynopsisdiv>
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<refsect1 xml:id="description"><title>Description</title>
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<para>
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In the compute language, <varname>gl_GlobalInvocationID</varname>
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is a derived input variable containing the n-dimensional index of the
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work invocation within the global work group that the current shader is
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executing on. The value of <varname>gl_GlobalInvocationID</varname> is equal to
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<varname>gl_WorkGroupID</varname> * <varname>gl_WorkGroupSize</varname> + <varname>gl_LocalInvocationID</varname>.
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</para>
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</refsect1>
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<refsect1 xml:id="versions">
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<title>Version Support</title>
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<informaltable>
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<tgroup cols="4" align="left">
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="funchead.xml" xpointer="xpointer(/*/*)"/>
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<tbody>
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<row>
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<entry><varname>gl_GlobalInvocationID</varname></entry>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="version.xml" xpointer="xpointer(/*/*[@role='es31']/*)"/>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 xml:id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>gl_NumWorkGroups</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>gl_WorkGroupID</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>gl_WorkGroupSize</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>gl_LocalInvocationID</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 xml:id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"/> 2011-2014 Khronos Group.
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This material may be distributed subject to the terms and conditions set forth in
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the Open Publication License, v 1.0, 8 June 1999.
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
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</para>
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</refsect1>
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</refentry>
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