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pref=
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renderer=
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"Content-Type" content=
"text/html; charset=UTF-8" /><link rel=
"stylesheet" type=
"text/css" href=
"opengl-man.css" /><title>packUnorm - 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=
"packUnorm"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>packUnorm — pack floating-point values into an unsigned integer
</p></div><div class=
"refsynopsisdiv"><h2>Declaration
</h2><div class=
"funcsynopsis"><p><code class=
"funcdef">uint
<b class=
"fsfunc">packUnorm2x16
</b>(
</code>vec2
<var class=
"pdparam">v
</var><code>)
</code>;
</p><p><code class=
"funcdef">uint
<b class=
"fsfunc">packSnorm2x16
</b>(
</code>vec2
<var class=
"pdparam">v
</var><code>)
</code>;
</p><p><code class=
"funcdef">uint
<b class=
"fsfunc">packUnorm4x8
</b>(
</code>vec4
<var class=
"pdparam">v
</var><code>)
</code>;
</p><p><code class=
"funcdef">uint
<b class=
"fsfunc">packSnorm4x8
</b>(
</code>vec4
<var class=
"pdparam">v
</var><code>)
</code>;
</p></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>v
</code></em></span></dt><dd><p>
5 Specifies a vector of values to be packed into an unsigned integer.
6 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
7 <code class=
"function">packUnorm2x16
</code>,
<code class=
"function">packSnorm2x16
</code>,
<code class=
"function">packUnorm4x8
</code> and
<code class=
"function">packSnorm4x8
</code> convert
8 each component of the normalized floating-ponit value
<em class=
"parameter"><code>v
</code></em> into
8- or
16-bit integer
9 values and then packs the results into a
32-bit unsigned intgeter.
11 The conversion for component
<em class=
"parameter"><code>c
</code></em> of
<em class=
"parameter"><code>v
</code></em> to fixed-point is
13 </p><div class=
"itemizedlist"><ul type=
"disc"><li><code class=
"function">packUnorm2x16
</code>:
<code class=
"code"><a href=
"round.xml"><span class=
"citerefentry"><span class=
"refentrytitle">round
</span></span></a>(
<a href=
"clamp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">clamp
</span></span></a>(
<em class=
"parameter"><code>c
</code></em>,
0.0,
1.0) *
65535.0)
</code></li><li><code class=
"function">packSnorm2x16
</code>:
<code class=
"code"><a href=
"round.xml"><span class=
"citerefentry"><span class=
"refentrytitle">round
</span></span></a>(
<a href=
"clamp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">clamp
</span></span></a>(
<em class=
"parameter"><code>c
</code></em>, -
1.0,
1.0) *
32767.0)
</code></li><li><code class=
"function">packUnorm4x8
</code>:
<code class=
"code"><a href=
"round.xml"><span class=
"citerefentry"><span class=
"refentrytitle">round
</span></span></a>(
<a href=
"clamp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">clamp
</span></span></a>(
<em class=
"parameter"><code>c
</code></em>,
0.0,
1.0) *
255.0)
</code></li><li><code class=
"function">packSnorm4x8
</code>:
<code class=
"code"><a href=
"round.xml"><span class=
"citerefentry"><span class=
"refentrytitle">round
</span></span></a>(
<a href=
"clamp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">clamp
</span></span></a>(
<em class=
"parameter"><code>c
</code></em>, -
1.0,
1.0) *
127.0)
</code></li></ul></div><p>
15 The first component of the vector will be written to the least significant bits of the output;
16 the last component will be written to the most significant bits.
17 </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" /><col align=
"center" /></colgroup><thead><tr><th align=
"left"><span class=
"bold"><strong>Function
</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=
"center"><span class=
"bold"><strong>Version
4.30</strong></span></th></tr><tr><th align=
"left">packUnorm2x16
</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>-
</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></tr><tr><th align=
"left">packSnorm2x16
</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>-
</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></tr><tr><th align=
"left">packUnorm4x8
</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>-
</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></tr><tr><th align=
"left">packSnorm4x8
</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>-
</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></tr></thead></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
18 <a href=
"unpackUnorm2x16.xml"><span class=
"citerefentry"><span class=
"refentrytitle">unpackUnorm2x16
</span></span></a>,
19 <a href=
"unpackSnorm2x16.xml"><span class=
"citerefentry"><span class=
"refentrytitle">unpackSnorm2x16
</span></span></a>,
20 <a href=
"unpackUnorm4x8.xml"><span class=
"citerefentry"><span class=
"refentrytitle">unpackUnorm4x8
</span></span></a>,
21 <a href=
"unpackSnorm4x8.xml"><span class=
"citerefentry"><span class=
"refentrytitle">unpackSnorm4x8
</span></span></a>
22 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
23 Copyright
<span class=
"trademark"></span>©
2011 Khronos Group.
24 This material may be distributed subject to the terms and conditions set forth in
25 the Open Publication License, v
1.0,
8 June
1999.
26 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
27 </p></div></div></body></html>