ID3DXPRTBuffer interface
The ID3DXPRTBuffer interface is used as a data buffer to store vertex and pixel data for use with precomputed radiance transfer (PRT) methods and functions.
Members
The ID3DXPRTBuffer interface inherits from the IUnknown interface. ID3DXPRTBuffer also has these types of members:
Methods
The ID3DXPRTBuffer interface has these methods.
| Method | Description |
|---|---|
| AddBuffer | Adds another buffer to the ID3DXPRTBuffer and stores the results in ID3DXPRTBuffer. |
| AttachGH | Associates an ID3DXTextureGutterHelper object with the ID3DXPRTBuffer object. |
| EvalGH | Applies stored texture gutter data to an ID3DXPRTBuffer texture buffer. |
| ExtractTexture | Extracts coefficient data from a color channel of the buffer for a specified range of coefficients, and adds the data to an IDirect3DTexture9 object. |
| ExtractToMesh | Extracts coefficient data from a single-channel buffer and adds the data to an ID3DXMesh object. |
| GetHeight | Retrieves the height of the texture, in pixels. |
| GetNumChannels | Retrieves the number of color channels used in memory to store samples. |
| GetNumCoeffs | Retrieves the number of scalars per color channel used in memory to store samples. |
| GetNumSamples | Retrieves the number of vertices (or texels) sampled. |
| GetWidth | Retrieves the width of the texture, in pixels. |
| IsTexture | Indicates whether the buffer contains a texture. |
| LockBuffer | Locks a range of vertex or texel sample data and obtains a pointer to the location in buffer memory. |
| ReleaseGH | Unassociates an attached ID3DXTextureGutterHelper object with the ID3DXPRTBuffer object. |
| Resize | Changes the number of samples contained in the buffer. |
| ScaleBuffer | Multiplies every value in the buffer by a constant value. |
| UnlockBuffer | Ends the lifespan of the ppData pointer returned by ID3DXPRTBuffer::LockBuffer. |
Remarks
The ID3DXPRTBuffer interface is obtained by calling the D3DXCreatePRTBuffer or D3DXCreatePRTBufferTex functions.
The LPD3DXPRTBUFFER type is defined as a pointer to the ID3DXPRTBuffer interface.
typedef interface ID3DXPRTBuffer ID3DXPRTBuffer;
typedef interface ID3DXPRTBuffer *LPD3DXPRTBUFFER;
Requirements
| Requirement | Value |
|---|---|
| Header |
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| Library |
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See also