Name

unpackUnorm2x16, unpackSnorm2x16 — unpack floating-point values from an unsigned integer

Declaration

vec2 unpackUnorm2x16(uint p);
 
vec2 unpackSnorm2x16(uint p);
 

Parameters

p

Specifies an unsigned integer containing packed floating-point values.

Description

unpackUnorm2x16, unpackSnorm2x16 unpack single 32-bit unsigned integers, specified in the parameter p into a pair of 16-bit unsigned integers. Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector.

The conversion for unpacked fixed point value f to floating-point is performed as follows:

  • unpackUnorm2x16: f / 65535.0

  • unpackSnorm2x16: clamp(f / 32727.0, -1.0, 1.0)

The first component of the returned vector will be extracted from the least significant bits of the input; the last component will be extracted from the most significant bits.

Version Support

OpenGL ES Shading Language Version
Function Name 1.00 3.00
unpackUnorm2x16-✔
unpackSnorm2x16-✔

See Also

clamp, packUnorm2x16, packSnorm2x16

Copyright

Copyright © 2011-2013 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.