 Important: |
|---|
| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
The DDOVERLAYFXstructure passes override information to the IDirectDrawSurface5::UpdateOverlaymethod.
typedef struct _DDOVERLAYFX{
DWORD
dwSize
;
DWORD
dwAlphaEdgeBlendBitDepth
;
DWORD
dwAlphaEdgeBlend
;
DWORD
dwReserved
;
DWORD
dwAlphaDestConstBitDepth
;
union
{
DWORD
dwAlphaDestConst
;
LPDIRECTDRAWSURFACE
lpDDSAlphaDest
;
} DUMMYUNIONNAMEN(1);
DWORD
dwAlphaSrcConstBitDepth
;
union
{
DWORD
dwAlphaSrcConst
;
LPDIRECTDRAWSURFACE
lpDDSAlphaSrc
;
} DUMMYUNIONNAMEN(2);
DDCOLORKEY
dckDestColorkey
;
DDCOLORKEY
dckSrcColorkey
;
DWORD
dwDDFX
;
DWORD
dwFlags
;
} DDOVERLAYFX,FAR *LPDDOVERLAYFX;
Members
- dwSize
- Size of the structure, in bytes. This members must be initialized before the structure is used.
- dwAlphaEdgeBlendBitDepth
- Bit depth used to specify the constant for an alpha edge blend.
- dwAlphaEdgeBlend
- Constant to use as the alpha for an edge blend.
- dwReserved
- Reserved for future use.
- dwAlphaDestConstBitDepth
- Bit depth used to specify the alpha constant for a destination.
- dwAlphaDestConst
- Constant to use as the alpha channel for a destination.
- lpDDSAlphaDest
- Address of a surface to use as the alpha channel for a destination.
- dwAlphaSrcConstBitDepth
- Bit depth used to specify the alpha constant for a source.
- dwAlphaSrcConst
- Constant to use as the alpha channel for a source.
- lpDDSAlphaSrc
- Address of a surface to use as the alpha channel for a source.
- dckDestColorkey
- Destination color key override.
- dckSrcColorkey
- Source color key override.
- dwDDFX
- Overlay FX flags.
DDOVERFX_ARITHSTRETCHY If stretching, use arithmetic stretching along the y-axis for this overlay. DDOVERFX_MIRRORLEFTRIGHT Mirror the overlay around the vertical axis. DDOVERFX_MIRRORUPDOWN Mirror the overlay around the horizontal axis. - dwFlags
- This member is currently not used and must be set to zero.
Remarks
The unions in this structure have been updated to work with compilers that don't support nameless unions. If your compiler doesn't support nameless unions, define the NONAMELESSUNION token before including the Ddraw.h header file.
Requirements
Runs on Versions Declared in Windows CE OS 2.12 or later. Version 2.12 requires DXPAK 1.0 or later. ddraw.h