D3DXSavePRTBufferToFile function
Saves a precomputed radiance transfer (PRT) buffer to disk.
Syntax
HRESULT D3DXSavePRTBufferToFile(
_In_ LPCSTR pFileName,
_In_ LPD3DXPRTBUFFER pBuffer
);
Parameters
pFileName [in]
Type: LPCSTR
Name of the file to which the buffer is to be saved.
pBuffer [in]
Type: LPD3DXPRTBUFFER
Address of a pointer to the input ID3DXPRTBuffer object.
Return value
Type: HRESULT
If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be D3DERR_INVALIDCALL.
Remarks
The compiler setting also determines the function version. If Unicode is defined, then the function call resolves to D3DXSavePRTBufferToFileW. Otherwise, the function call resolves to D3DXSavePRTBufferToFileA.
The PRT file format is a binary file in the form of a header and then a data block.
struct PRTHeader
{
UINT NumSamples;
UINT NumCoeffs;
UINT NumChannels;
UINT TexWidth;
UINT TexHeight;
UINT bIsTex;
};
For the case of bIsTex being non-zero, NumSamples should equal TexWidth * TexHeight.
The data block that follows the header is NumSamples * NumCoeffs * NumChannels * sizeof(float) bytes.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|