Write as R32_UINT, read as R8G8B8A8_UNORM.

Hi forum!

I would like to write to texture 3 material parameters.

Each of the parameters are unorm 8 bit values, packed as one uint.

The idea is to write to texture R32_UINT, and read from it as R8G8B8A8_UNORM.

cbuffer PsCb
{
	uint   Mat; //Packed: RGB - material, A-not in use yet
	float3 pad;
}

struct PsOut
{
	...
	uint material : SV_TARGET2; //RGB - material, A-not in use yet
};

PsOut main(float3 normalVS : NORMAL, float2 uv : TEXCOORD0)
{
	PsOut ret;

	...
	ret.material = Mat;  //???

	return ret;
}

But any my attempt to create such kind of texture were errors/warnings from DX runtime like:

The Format (0x1c, R8G8B8A8_UNORM) is invalid, when creating a View; it is not a fully qualified Format castable from the Format of the Resource (0x27, R32_TYPELESS)

The only solution I can imagine – is to manually repack uint32 material data on a shader to 4 floats.

Is there an elegant way to write to texture R32_UINT, and read it as R8G8B8A8_UNORM via hardware or I should unpack uint to 4 floats?

Thanks in advance!