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

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	D3DX9Mesh.h
Library	D3dx9.lib

See also

D3DX Interfaces

D3DXCreatePRTBuffer

D3DXCreatePRTBufferTex

ID3DXPRTCompBuffer