D3DMPRESENTFLAG_LOCKABLE_BACKBUFFER
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4/8/2010
This macro is a flag that is used to indicate that a back buffer is lockable. This flag is used in the Flags member of the D3DMPRESENT_PARAMETERS structure.
Syntax
#define D3DMPRESENTFLAG_LOCKABLE_BACKBUFFER 0x00000001
Remarks
Set this flag if the application requires the ability to lock the back buffer directly. Note that back buffers are not lockable unless the application specifies D3DPRESENTFLAG_LOCKABLE_BACKBUFFER when calling IDirect3DMobile::CreateDevice or IDirect3DMobileDevice::Reset. Lockable back buffers incur a performance cost on some graphics hardware.
Performing a lock operation (or using IDirect3DMobileDevice::CopyRects to read/write) on the lockable back buffer decreases performance on many cards. In this case, consider using textured triangles to move data to the back buffer.
Requirements
| Header | d3dmtypes.h |
| Windows Embedded CE | Windows CE 5.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |