Intrinsics1 min read
pack_unorm4x8
Packs four normalized floats into one 32-bit unsigned integer.
Reading Time
1 min
Word Count
95
Sections
7
Try It Live
Test pack_unorm4x8 in a live shader
Open the playground, start from a visual preset, and wire pack_unorm4x8 into the fragment stage to see how it behaves with real values.
Open PlaygroundThe pack_unorm4x8 function clamps four float components to [0, 1], converts them to 8-bit unsigned normalized values, and packs them into a single uint.
Live Demo
Signature
bwsl
pack_unorm4x8 :: (float4 value) -> uint
Parameters
| Parameter | Type | Description |
|---|---|---|
value | float4 | Components to clamp, quantize, and pack |
Return Value
Returns a uint containing four 8-bit UNorm channels.
Example
bwsl
float4 color = saturate(input.color);
uint packed = pack_unorm4x8(color);Compiled Output
When compiled to GLSL:
glsl
packUnorm4x8(value)
When compiled to HLSL:
hlsl
// lowered to saturate, round, shifts, and bitwise OR
When compiled to Metal:
metal
pack_unorm4x8(value)
See Also
- unpack_unorm4x8 - Decode packed UNorm channels
- pack_snorm4x8 - Pack signed normalized channels
- bitfield_insert - Insert packed bit fields