NAME

       packUnorm - pack floating-point values into an unsigned integer

DECLARATION

       uint packUnorm2x16(vec2 v);

       uint packSnorm2x16(vec2 v);

       uint packUnorm4x8(vec4 v);

       uint packSnorm4x8(vec4 v);

PARAMETERS

       v
           Specifies a vector of values to be packed into an unsigned integer.

DESCRIPTION

       packUnorm2x16, packSnorm2x16, packUnorm4x8 and packSnorm4x8 convert each component of the
       normalized floating-ponit value v into 8- or 16-bit integer values and then packs the
       results into a 32-bit unsigned intgeter.

       The conversion for component c of v to fixed-point is performed as follows:

       ·   packUnorm2x16: round(clamp(c, 0.0, 1.0) * 65535.0)

       ·   packSnorm2x16: round(clamp(c, -1.0, 1.0) * 32767.0)

       ·   packUnorm4x8: round(clamp(c, 0.0, 1.0) * 255.0)

       ·   packSnorm4x8: round(clamp(c, -1.0, 1.0) * 127.0)

       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.

VERSION SUPPORT

       ┌──────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │              │        OpenGL Shading Language Version                                            │
       ├──────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │Function      │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │Name          │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │packUnorm2x16 │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├──────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │packSnorm2x16 │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├──────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │packUnorm4x8  │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├──────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │packSnorm4x8  │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └──────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       unpackUnorm2x16(), unpackSnorm2x16(), unpackUnorm4x8(), unpackSnorm4x8()

COPYRIGHT

       Copyright © 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.
       http://opencontent.org/openpub/.

COPYRIGHT

       Copyright © 2011-2014 Khronos Group

[FIXME: source]                             07/22/2015                              PACKUNORM(3G)