mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-26 13:15:38 +00:00
95 lines
4.4 KiB
XML
95 lines
4.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
|
|
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
|
|
<refentry id="glMinSampleShading">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>2010</year>
|
|
<holder>Khronos Group.</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glMinSampleShading</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glMinSampleShading</refname>
|
|
<refpurpose>specifies minimum rate at which sample shaing takes place</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glMinSampleShading</function></funcdef>
|
|
<paramdef>GLfloat <parameter>value</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<!-- eqn: ignoring delim $$ -->
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>value</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the rate at which samples are shaded within each covered pixel.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
<function>glMinSampleShading</function> specifies the rate at which samples are shaded within
|
|
a covered pixel. Sample-rate shading is enabled by calling <citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry>
|
|
with the parameter <constant>GL_SAMPLE_SHADING</constant>. If <constant>GL_MULTISAMPLE</constant>
|
|
or <constant>GL_SAMPLE_SHADING</constant> is disabled, sample shading has no effect.
|
|
Otherwise, an implementation must provide at least as many unique color values for
|
|
each covered fragment as specified by <parameter>value</parameter> times <parameter>samples</parameter> where
|
|
<parameter>samples</parameter> is the value of <constant>GL_SAMPLES</constant> for the current
|
|
framebuffer. At least 1 sample for each covered fragment is generated.
|
|
</para>
|
|
<para>
|
|
A <parameter>value</parameter> of 1.0 indicates that each sample in the framebuffer should be
|
|
indpendently shaded. A <parameter>value</parameter> of 0.0 effectively allows the GL to ignore
|
|
sample rate shading. Any value between 0.0 and 1.0 allows the GL to shade only a subset
|
|
of the total samples within each covered fragment. Which samples are shaded and the algorithm
|
|
used to select that subset of the fragment's samples is implementation dependent.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
The type of the <parameter>value</parameter> parameter was
|
|
changed from GLclampf to GLfloat. This change is transparent
|
|
to user code and is described in detail on the
|
|
<citerefentry><refentrytitle>removedTypes</refentrytitle></citerefentry>
|
|
page.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
None.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="associatedgets"><title>Associated Gets</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_MIN_SAMPLE_SHADING</constant>.
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_SAMPLES</constant>.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>removedTypes</refentrytitle></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="Copyright"><title>Copyright</title>
|
|
<para>
|
|
Copyright <trademark class="copyright"></trademark> 2011 Khronos Group.
|
|
This material may be distributed subject to the terms and conditions set forth in
|
|
the Open Publication License, v 1.0, 8 June 1999.
|
|
<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|