D3DMPRESENTFLAG_LOCKABLE_BACKBUFFER (Windows Embedded CE 6.0)

1/6/2010

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

See Also

Reference

Direct3D Mobile Macros