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| 4 | <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="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"> |
| 15 | gl_SampleMaskIn |
| 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> |