DXBLTOPTIONS Enumeration

Describes the methods to use when blitting an image onto a DXSurface.

Syntax

typedef enum DXBLTOPTIONS
{
    DXBOF_DO_OVER          = (1L << 0),
    DXBOF_DITHER           = (1L << 1)
} DXBLTOPTIONS;

Elements

DXBOF_DO_OVER
Source samples should be alpha-blended over the samples in the destination DXSurface. Without this flag, the input samples replace the destination samples.
DXBOF_DITHER
Output surface samples should be dithered.

Remarks

These flags are used by the IDXSurfaceFactory::BitBlt and DXBitBlt functions.
Some transforms do not support dithered output. To determine whether a transform supports dithering, use the IDXTransform::GetMiscFlags method. If the returned DXTMISCFLAGS value has the DXTMF_DITHER_SUPPORTED flag set, the output can be dithered.