'\" t
.\"     Title: packUnorm
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 01/03/2018
.\"    Manual: [FIXME: manual]
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "PACKUNORM" "3G" "01/03/2018" "[FIXME: source]" "[FIXME: manual]"
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.nh
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
packUnorm \- pack floating\-point values into an unsigned integer
.SH "DECLARATION"
.HP \w'uint\ packUnorm2x16('u
.BI "uint packUnorm2x16(vec2\ " "v" ");"
.HP \w'uint\ packSnorm2x16('u
.BI "uint packSnorm2x16(vec2\ " "v" ");"
.HP \w'uint\ packUnorm4x8('u
.BI "uint packUnorm4x8(vec4\ " "v" ");"
.HP \w'uint\ packSnorm4x8('u
.BI "uint packSnorm4x8(vec4\ " "v" ");"
.SH "PARAMETERS"
.PP
\fIv\fR
.RS 4
Specifies a vector of values to be packed into an unsigned integer\&.
.RE
.SH "DESCRIPTION"
.PP
\fBpackUnorm2x16\fR,
\fBpackSnorm2x16\fR,
\fBpackUnorm4x8\fR
and
\fBpackSnorm4x8\fR
convert each component of the normalized floating\-ponit value
\fIv\fR
into 8\- or 16\-bit integer values and then packs the results into a 32\-bit unsigned intgeter\&.
.PP
The conversion for component
\fIc\fR
of
\fIv\fR
to fixed\-point is performed as follows:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBpackUnorm2x16\fR:
\fBround\fR(\fBclamp\fR(\fIc\fR, 0\&.0, 1\&.0) * 65535\&.0)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBpackSnorm2x16\fR:
\fBround\fR(\fBclamp\fR(\fIc\fR, \-1\&.0, 1\&.0) * 32767\&.0)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBpackUnorm4x8\fR:
\fBround\fR(\fBclamp\fR(\fIc\fR, 0\&.0, 1\&.0) * 255\&.0)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fBpackSnorm4x8\fR:
\fBround\fR(\fBclamp\fR(\fIc\fR, \-1\&.0, 1\&.0) * 127\&.0)
.RE
.PP
The first component of the vector will be written to the least significant bits of the output; the last component will be written to the most significant bits\&.
.SH "VERSION SUPPORT"
.TS
allbox tab(:);
lB cB s s s s s s s s s s s
lB cB cB cB cB cB cB cB cB cB cB cB cB.
T{

T}:T{
\fBOpenGL Shading Language Version\fR
T}
T{
\fBFunction Name\fR
T}:T{
\fB1\&.10\fR
T}:T{
\fB1\&.20\fR
T}:T{
\fB1\&.30\fR
T}:T{
\fB1\&.40\fR
T}:T{
\fB1\&.50\fR
T}:T{
\fB3\&.30\fR
T}:T{
\fB4\&.00\fR
T}:T{
\fB4\&.10\fR
T}:T{
\fB4\&.20\fR
T}:T{
\fB4\&.30\fR
T}:T{
\fB4\&.40\fR
T}:T{
\fB4\&.50\fR
T}
.T&
l c c c c c c c c c c c c
l c c c c c c c c c c c c
l c c c c c c c c c c c c
l c c c c c c c c c c c c.
T{
packUnorm2x16
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
T{
packSnorm2x16
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
T{
packUnorm4x8
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
T{
packSnorm4x8
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
.TE
.sp 1
.SH "SEE ALSO"
.PP


\fBunpackUnorm2x16\fR,

\fBunpackSnorm2x16\fR,

\fBunpackUnorm4x8\fR,

\fBunpackSnorm4x8\fR
.SH "COPYRIGHT"
.PP
Copyright
\(co
2011\-2014 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\&.
\m[blue]\fBhttp://opencontent\&.org/openpub/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 2011-2014 Khronos Group
.br