mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-27 11:35:32 +00:00
108 lines
5.3 KiB
XML
108 lines
5.3 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="glGetShaderPrecisionFormat">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>2010</year>
|
|
<holder>Khronos Group</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glGetShaderPrecisionFormat</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glGetShaderPrecisionFormat</refname>
|
|
<refpurpose>retrieve the range and precision for numeric formats supported by the shader compiler</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glGetShaderPrecisionFormat</function></funcdef>
|
|
<paramdef>GLenum <parameter>shaderType</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>precisionType</parameter></paramdef>
|
|
<paramdef>GLint *<parameter>range</parameter></paramdef>
|
|
<paramdef>GLint *<parameter>precision</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>shaderType</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the type of shader whose precision to query. <parameter>shaderType</parameter>
|
|
must be <constant>GL_VERTEX_SHADER</constant> or <constant>GL_FRAGMENT_SHADER</constant>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>precisionType</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the numeric format whose precision and range to query.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>range</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the address of array of two integers into which encodings of the implementation's
|
|
numeric range are returned.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>precision</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the address of an integer into which the numeric precision of the implementation
|
|
is written.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
<function>glGetShaderPrecisionFormat</function> retrieves the numeric range and precision for
|
|
the implementation's representation of quantities in different numeric formats in specified
|
|
shader type. <parameter>shaderType</parameter> specifies the type of shader for which the numeric
|
|
precision and range is to be retrieved and must be one of <constant>GL_VERTEX_SHADER</constant>
|
|
or <constant>GL_FRAGMENT_SHADER</constant>. <parameter>precisionType</parameter> specifies the
|
|
numeric format to query and must be one of <constant>GL_LOW_FLOAT</constant>, <constant>GL_MEDIUM_FLOAT</constant>
|
|
<constant>GL_HIGH_FLOAT</constant>, <constant>GL_LOW_INT</constant>, <constant>GL_MEDIUM_INT</constant>,
|
|
or <constant>GL_HIGH_INT</constant>.
|
|
</para>
|
|
<para>
|
|
<parameter>range</parameter> points to an array of two integers into which the format's numeric range
|
|
will be returned. If min and max are the smallest values representable in the format, then the values
|
|
returned are defined to be: <parameter>range</parameter>[0] = floor(log2(|min|)) and
|
|
<parameter>range</parameter>[1] = floor(log2(|max|)).
|
|
</para>
|
|
<para>
|
|
<parameter>precision</parameter> specifies the address of an integer into which will be written
|
|
the log2 value of the number of bits of precision of the format. If the smallest representable
|
|
value greater than 1 is 1 + <emphasis>eps</emphasis>, then the integer addressed by <parameter>precision</parameter>
|
|
will contain floor(-log2(eps)).
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>shaderType</parameter> or
|
|
<parameter>precisionType</parameter> is not an accepted value.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="Copyright"><title>Copyright</title>
|
|
<para>
|
|
Copyright <trademark class="copyright"></trademark> 2010 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>
|