DECLARATION
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uint packUnorm2x16(vec2 v);
- uint packSnorm2x16(vec2 v);
- uint packUnorm4x8(vec4 v);
- uint packSnorm4x8(vec4 v);
- uint packSnorm2x16(vec2 v);
PARAMETERS
v
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- 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
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OpenGL Shading Language Version
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| 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
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| packUnorm2x16 | - | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ |
✔
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| packSnorm2x16 | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ |
✔
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| packUnorm4x8 | - | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ |
✔
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| packSnorm4x8 | - | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ |
✔
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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. m[blue]http://opencontent.org/openpub/m[].
COPYRIGHT
Copyright © 2011-2014 Khronos Group