PACKUNORM(3G)                   [FIXME: manual]                  PACKUNORM(3G)

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:

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

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

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

       o   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 Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |packUnorm2x16 |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |packSnorm2x16 |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |packUnorm4x8  |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |packSnorm4x8  |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +--------------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO

       unpackUnorm2x16,

       unpackSnorm2x16,

       unpackUnorm4x8,

       unpackSnorm4x8

COPYRIGHT
       Copyright (C) 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.  https://opencontent.org/openpub/.

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group

[FIXME: source]                   06/13/2025                     PACKUNORM(3G)