Intrinsics1 min read
unpack_unorm4x8
Unpacks four unsigned normalized channels from a 32-bit integer.
Reading Time
1 min
Word Count
83
Sections
7
Try It Live
Test unpack_unorm4x8 in a live shader
Open the playground, start from a visual preset, and wire unpack_unorm4x8 into the fragment stage to see how it behaves with real values.
Open PlaygroundThe unpack_unorm4x8 function decodes a uint containing four 8-bit unsigned normalized channels into a float4 in [0, 1].
Live Demo
Signature
bwsl
unpack_unorm4x8 :: (uint packed) -> float4
Parameters
| Parameter | Type | Description |
|---|---|---|
packed | uint | Packed 4x8-bit UNorm value |
Return Value
Returns a float4 with components in [0, 1].
Example
bwsl
uint packed = resources.colorBuffer[index];
float4 color = unpack_unorm4x8(packed);Compiled Output
When compiled to GLSL:
glsl
unpackUnorm4x8(packed)
When compiled to HLSL:
hlsl
// lowered to shifts, masks, and division by 255
When compiled to Metal:
metal
unpack_unorm4x8(packed)
See Also
- pack_unorm4x8 - Pack UNorm channels
- unpack_snorm4x8 - Decode signed normalized channels
- bitfield_extract - Extract packed bit fields