D3DMLOCK Values (Windows CE 5.0)
These values are flags that describe the characteristics of a lock placed on a Direct3D Mobile resource. See the lock method descriptions for a list of the flags that are valid for a particular resource type.
The following table shows these values.
| Value | Description |
|---|---|
| D3DMLOCK_DISCARD | Indicates that the application intends to overwrite all bytes in the buffer while the buffer is locked. The contents of the buffer when locked are undefined.
This flag can only be used for buffers created with the D3DMUSAGE_DYNAMIC flag (see D3DMUSAGE Values). |
| D3DMLOCK_NO_DIRTY_UPDATE | Only valid when locking texture maps. This flag tells the middleware to not add a dirty region to the dirty region list for this locked area. |
| D3DMLOCK_NOOVERWRITE | Indicates that no indices that were referred to in drawing calls since the start of the frame or the last lock without this flag will be modified during the lock.
This flag can only be used for buffers created with the D3DMUSAGE_DYNAMIC flag (see D3DMUSAGE Values). |
| D3DMLOCK_READONLY | Indicates that the application can only read from the buffer and not write to it. |
| D3DMLOCK_VALID | This flag is used as a mask to validate combinations of the other flags. |
Requirements
OS Versions: Windows CE 5.0 and later.
Header: D3dmtypes.h.
See Also
Direct3D Mobile Macros | IDirect3DMobileIndexBuffer::Lock | IDirect3DMobileSurface::LockRect | IDirect3DMobileTexture::LockRect | IDirect3DMobileVertexBuffer::Lock
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