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93 lines
4.1 KiB
XML
93 lines
4.1 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="glClearStencil">
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<info>
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<copyright>
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<year>1991-2006</year>
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<holder>Silicon Graphics, Inc.</holder>
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</copyright>
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<copyright>
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<year>2010-2013</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>glClearStencil</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glClearStencil</refname>
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<refpurpose>specify the clear value for the stencil buffer</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glClearStencil</function></funcdef>
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<paramdef>GLint <parameter>s</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 xml:id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>s</parameter></term>
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<listitem>
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<para>
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Specifies the index used when the stencil buffer is cleared.
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The initial value is 0.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 xml:id="description"><title>Description</title>
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<para>
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<function>glClearStencil</function> specifies the index used by <citerefentry><refentrytitle>glClear</refentrytitle></citerefentry> to clear the stencil buffer.
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<parameter>s</parameter> is masked with
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<inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
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<!-- eqn: 2 sup m - 1: -->
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<mml:mrow>
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<mml:msup><mml:mn>2</mml:mn>
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<mml:mi mathvariant="italic">m</mml:mi>
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</mml:msup>
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<mml:mo>-</mml:mo>
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<mml:mn>1</mml:mn>
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</mml:mrow>
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</mml:math></inlineequation>,
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where
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<inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">m</mml:mi></mml:math></inlineequation>
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is the number of bits in the stencil buffer.
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</para>
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</refsect1>
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<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
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<para>
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_STENCIL_CLEAR_VALUE</constant>
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</para>
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<para>
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_STENCIL_BITS</constant>
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</para>
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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>glClear</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilFunc</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilFuncSeparate</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilMask</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilMaskSeparate</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilOp</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glStencilOpSeparate</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"/> 1991-2006 Silicon Graphics, Inc.
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Copyright <trademark class="copyright"/> 2010-2013 Khronos Group.
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This document is licensed under the SGI Free Software B License.
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For details, see
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</link>.
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</para>
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</refsect1>
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</refentry>
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