CONST_DDOVERFLAGS

The flags in the CONST_DDOVERFLAGS enumeration are used by the flags member of the DirectDrawSurface7.UpdateOverlay method to modify the visual attributes on an overlay.

Enum CONST_DDOVERFLAGS
    DDOVER_ADDDIRTYRECT             = 32768
    DDOVER_ALPHADEST                = 1
    DDOVER_ALPHADESTCONSTOVERRIDE   = 2
    DDOVER_ALPHADESTNEG             = 4
    DDOVER_ALPHADESTSURFACEOVERRIDE = 8
    DDOVER_ALPHAEDGEBLEND           = 16 
    DDOVER_ALPHASRC                 = 32
    DDOVER_ALPHASRCCONSTOVERRIDE    = 64
    DDOVER_ALPHASRCNEG              = 128
    DDOVER_ALPHASRCSURFACEOVERRIDE  = 256
    DDOVER_ARGBSCALEFACTORS         = 33554432
    DDOVER_AUTOFLIP                 = 1048576 
    DDOVER_BOB                      = 2097152 
    DDOVER_DDFX                     = 524288
    DDOVER_DEGRADEARGBSCALING       = 67108864
    DDOVER_HIDE                     = 512
    DDOVER_INTERLEAVED              = 8388608
    DDOVER_KEYDEST                  = 1024
    DDOVER_KEYDESTOVERRIDE          = 2048
    DDOVER_KEYSRC                   = 4096
    DDOVER_KEYSRCOVERRIDE           = 8192
    DDOVER_OVERRIDEBOBWEAVE         = 4194304
    DDOVER_REFRESHALL               = 131072
    DDOVER_REFRESHDIRTYRECTS        = 65536
    DDOVER_SHOW                     = 16384
End Enum

DDOVER_ADDDIRTYRECT

Adds a dirty rectangle to an emulated overlay surface.

DDOVER_ALPHADEST

Obsolete.

DDOVER_ALPHADESTCONSTOVERRIDE

Uses the lAlphaDestConst member of the DDOVERLAYFX type as the destination alpha channel for this overlay.

DDOVER_ALPHADESTNEG

The destination surface becomes more transparent as the alpha value increases (0 is opaque).

DDOVER_ALPHADESTSURFACEOVERRIDE

Uses the lpDDSAlphaDest member of the DDOVERLAYFX type as the alpha channel destination for this overlay.

DDOVER_ALPHAEDGEBLEND

Uses the lAlphaEdgeBlend member of the DDOVERLAYFX type as the alpha channel for the edges of the image that border the color key colors.

DDOVER_ALPHASRC

Uses either the alpha information in pixel format or the alpha channel surface attached to the source surface as the source alpha channel for this overlay.

DDOVER_ALPHASRCCONSTOVERRIDE

Uses the lAlphaSrcConst member of the DDOVERLAYFX type as the source alpha channel for this overlay.

DDOVER_ALPHASRCNEG

The source surface becomes more transparent as the alpha value increases (0 is opaque).

DDOVER_ALPHASRCSURFACEOVERRIDE

Uses the lpDDSAlphaSrc member of the DDOVERLAYFX structure as the alpha channel source for this overlay.

DDOVER_ARGBSCALEFACTORS

New for DirectX 7.0. Overlay FX structure contains valid ARGB scaling factors.

DDOVER_AUTOFLIP

Automatically flips to the next surface in the flip chain each time a video port VSYNC occurs.

DDOVER_BOB

Displays each field of the interlaced video stream individually without causing any artifacts.

DDOVER_DDFX

When calling the DirectDrawSurface7.UpdateOverlayFx, setting this flag uses the flags set in the ddoverfx parameter to define special overlay effects. This flag must be set, or the ddoverfx parameter is ignored.

DDOVER_DEGRADEARGBSCALING

New for DirectX 7.0. ARGB scaling factors can be degraded to fit driver capabilities.

DDOVER_HIDE

Turns off this overlay.

DDOVER_INTERLEAVED

The surface memory is composed of interleaved fields.

DDOVER_KEYDEST

Uses the color key associated with the destination surface.

DDOVER_KEYDESTOVERRIDE

Uses the dckDestColorkey member of the DDOVERLAYFX type as the color key for the destination surface.

DDOVER_KEYSRC

Uses the color key associated with the source surface.

DDOVER_KEYSRCOVERRIDE

Uses the dckSrcColorkey member of the DDOVERLAYFX type as the color key for the source surface.

DDOVER_OVERRIDEBOBWEAVE

Bob and weave decisions should not be overridden by other interfaces.

DDOVER_REFRESHALL

Redraws the entire surface on an emulated overlayed surface.

DDOVER_REFRESHDIRTYRECTS

Redraws all dirty rectangles on an emulated overlayed surface.

DDOVER_SHOW

Turns on this overlay.