XMLoadUDecN4_XR function (directxpackedvector.h)
Loads an extended range XMUDECN4 into an XMVECTOR. This type loads a 10:10:10:2 normalized GPU format using the Extended Range (XR) with the color bias set to match DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM.
Syntax
XMVECTOR XM_CALLCONV XMLoadUDecN4_XR(
[in] const XMUDECN4 *pSource
) noexcept;
Parameters
[in] pSource
Address of the XMUDECN4 structure to load.
Return value
Returns an XMVECTOR loaded with the data from the pSource parameter.
Remarks
The following pseudocode demonstrates the operation of the function.
XMVECTOR vectorOut;
int32_t Element;
Element = pSource->v & 0x3FF;
vectorOut.x = (float)(Element - 0x180) / 510.f;
Element = (pSource->v >> 10) & 0x3FF;
vectorOut.y = (float)(Element - 0x180) / 510.f;
Element = (pSource->v >> 20) & 0x3FF;
vectorOut.z = (float)(Element - 0x180) / 510.f;
vectorOut.w = (float)(pSource->v >> 30) / 3.f;
return vectorOut;
For more details on the Extended Range (XR) with Bias conversion, see XR_BIAS Color Channel Conversion Rules.
Platform Requirements
Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | directxpackedvector.h (include DirectXPackedVector.h) |