upstream-man-pages/manglsl/gl_PatchVerticesIn.xml

   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_PatchVerticesIn">
   5     <refmeta>
   6         <refmetainfo>
   7             <copyright>
   8                 <year>2011</year>
   9                 <holder>Khronos Group</holder>
  10             </copyright>
  11         </refmetainfo>
  12         <refentrytitle>gl_PatchVerticesIn</refentrytitle>
  13         <manvolnum>3G</manvolnum>
  14     </refmeta>
  15     <refnamediv>
  16         <refname>gl_PatchVerticesIn</refname>
  17         <refpurpose>contains the number of vertices in the current patch</refpurpose>
  18     </refnamediv>
  19     <refsynopsisdiv><title>Declaration</title>
  20         <funcsynopsis>
  21             <function>in int gl_PatchVerticesIn;</function>
  22         </funcsynopsis>
  23     </refsynopsisdiv>
  24     <refsect1 id="description"><title>Description</title>
  25         <para>
  26             Available only in the tessellation control and evaluation languages, <function>gl_PatchVerticesIn</function>
  27             contains the number of vertices in the input being processed by the shader. A single tessellation control or
  28             evaluation shader can read patches of differing sizes, and so th value of <function>gl_PatchVertexIn</function>
  29             may differ between patches.
  30         </para>
  31     </refsect1>
  32     <refsect1 id="versions"><title>Version Support</title>
  33         <informaltable frame="topbot">
  34             #VARTABLECOLS#
  35                 <thead>
  36                     #VARTABLEHEADER#
  37                     <row>
  38                         <entry>gl_PatchVerticesIn</entry>#newin40#
  39                     </row>
  40                 </thead>
  41             </tgroup>
  42         </informaltable>
  43     </refsect1>
  44     <refsect1 id="seealso"><title>See Also</title>
  45         <para>
  46             <citerefentry><refentrytitle>gl_TessLevelOuter</refentrytitle></citerefentry>,
  47             <citerefentry><refentrytitle>gl_TessLevelInner</refentrytitle></citerefentry>,
  48             <citerefentry><refentrytitle>gl_TessCoord</refentrytitle></citerefentry>
  49         </para>
  50     </refsect1>
  51     <refsect1 id="Copyright"><title>Copyright</title>
  52         <para>
  53             Copyright <trademark class="copyright"></trademark> 2011 Khronos Group.
  54             This material may be distributed subject to the terms and conditions set forth in
  55             the Open Publication License, v 1.0, 8 June 1999.
  56             <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
  57         </para>
  58     </refsect1>
  59 </refentry>