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Microsoft DirectX 9.0

ID3DXPatchMesh::LockIndexBuffer Method


Lock the index buffer.

Syntax

HRESULT LockIndexBuffer(      

    DWORD Flags,     VOID **ppData );

Parameters

Flags
[in] Combination of zero or more locking flags that describe the type of lock to perform. For this method, the valid flags are:
  • D3DLOCK_DISCARD
  • D3DLOCK_NO_DIRTY_UPDATE
  • D3DLOCK_NO_SYSLOCK
  • D3DLOCK_READONLY

For a description of the flags, see D3DLOCK.

ppData
[out, retval] VOID* pointer to a memory buffer containing the returned index data.

Return Value

If the method succeeds, the return value is D3D_OK.

If the method fails, the return value can be one of the following values.

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.


Remarks

The index buffer is usually locked, written to, and then unlocked for reading. Patch mesh index buffers are 16-bit buffers.

See Also

D3DXCreatePatchMesh


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