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"opengl-man.css" /><title>gl_SampleMaskIn - OpenGL Shading Language (GLSL)
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.69.1" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"gl_SampleMaskIn"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>gl_SampleMaskIn — contains the computed sample coverage mask for the current fragment
</p></div><div class=
"refsynopsisdiv"><h2>Declaration
</h2><div class=
"funcsynopsis"><code class=
"function">in int gl_SampleMaskIn[];
</code></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
5 <code class=
"function">gl_SampleMaskIn
</code> is a fragment language that indicates the
6 set of samples covered by the primitive generating the fragment during
7 multisample rasterization. It has a sample bit set if and only if the sample
8 is considered covered for this fragment shader invocation. Bit
9 <span class=
"emphasis"><em>B
</em></span> of mask
<code class=
"function">gl_SampleMask[M]
</code>
10 corresponds to sample
32 *
<span class=
"emphasis"><em>M
</em></span> +
<span class=
"emphasis"><em>B
</em></span>.
11 The array has
<code class=
"function">ceil
</code>(
<span class=
"emphasis"><em>s
</em></span> /
32) elements
12 where
<span class=
"emphasis"><em>s
</em></span> is the maximum number of color samples supported
13 by the implementation.
14 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"versions"></a><h2>Version Support
</h2><div class=
"informaltable"><table border=
"1"><colgroup><col align=
"left" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /><col align=
"center" /></colgroup><thead><tr><th align=
"left"><span class=
"bold"><strong>Variable
</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.10</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.20</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.30</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.40</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
1.50</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
3.30</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.00</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.10</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.20</strong></span></th><th align=
"left"><span class=
"bold"><strong>Version
4.30</strong></span></th></tr><tr><th align=
"left">
16 </th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>-
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"center"><span class=
"emphasis"><em>Y
</em></span></th><th align=
"left"><span class=
"emphasis"><em>Y
</em></span></th></tr></thead></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
17 <a href=
"gl_SampleMask.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gl_SampleMask
</span></span></a>,
18 <a href=
"gl_SampleID.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gl_SampleID
</span></span></a>,
19 <a href=
"gl_SamplePosition.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gl_SamplePosition
</span></span></a>,
20 <a href=
"gl_FragCoord.xml"><span class=
"citerefentry"><span class=
"refentrytitle">gl_FragCoord
</span></span></a>
21 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
22 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
23 This material may be distributed subject to the terms and conditions set forth in
24 the Open Publication License, v
1.0,
8 June
1999.
25 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
26 </p></div></div></body></html>