D3DXCreatePRTCompBuffer
Microsoft DirectX 9.0 SDK Update (October 2004)

D3DXCreatePRTCompBuffer Function


Creates a compressed precomputed radiance transfer (PRT) buffer from an uncompressed ID3DXPRTBuffer object. This function should be used with per-vertex or volume buffers.

Syntax

HRESULT WINAPI D3DXCreatePRTCompBuffer(      

    D3DXSHCOMPRESSQUALITYTYPE Quality,     UINT NumClusters,     UINT NumPCA,     LPD3DXPRTBUFFER pBuffer,     LPD3DXPRTCOMPBUFFER *ppBuffer );

Parameters

Quality
[in] Quality of spherical harmonic (SH) compression. See D3DXSHCOMPRESSQUALITYTYPE.
NumClusters
[in] Number of clusters to use for compression.
NumPCA
[in] Number of principal component analysis (PCA) basis vectors to use in each cluster.
pBuffer
[in] Address of a pointer to the uncompressed ID3DXPRTBuffer object that will be compressed.
ppBuffer
[in, out] Address of a pointer to the output ID3DXPRTCompBuffer object.

Return Value

If the function succeeds, the return value is D3D_OK.

If the function fails, the return value can be one of the following:

D3DERR_INVALIDCALLThe method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORYMicrosoft Direct3D could not allocate sufficient memory to complete the call.


Function Information

Headerd3dx9mesh.h
Import libraryd3dx9.lib
Minimum operating systems Windows 98

See Also

D3DXCreatePRTBufferTex


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