DDHAL_UPDATEOVERLAYDATA (Windows CE 5.0)
This structure contains information necessary for updating an overlay surface. This structure passes the information to the DirectDraw hardware abstraction layer (DDHAL) UpdateOverlay callback function.
typedef struct _DDHAL_UPDATEOVERLAYDATA {LPDDRAWI_DIRECTDRAW_GBLlpDD;LPDDRAWI_DDRAWSURFACE_LCLlpDDDestSurface;RECTLrDest;LPDDRAWI_DDRAWSURFACE_LCLlpDDSrcSurface;RECTLrSrc;DWORDdwFlags;DDOVERLAYFXoverlayFX;HRESULTddRVal;LPDDHALSURFCB_UPDATEOVERLAYUpdateOverlay;} DDHAL_UPDATEOVERLAYDATA;
Members
lpDD**
Pointer to the DDRAWI_DIRECTDRAW_GBL structure that represents the DirectDraw object.lpDDDestSurface**
Pointer to the DDRAWI_DDRAWSURFACE_LCL structure that represents the surface that is being overlaid.rDest
Pointer to a RECT structure that contains the x, y, width, and height of the region on the destination surface.lpDDSrcSurface**
Pointer to the DDRAWI_DDRAWSURFACE_LCL structure that represents the DirectDraw overlay surface.rSrc**
Pointer to a RECT structure that contains the x, y, width, and height of the region on the source surface.dwFlags**
Overlay FX control flags.The following table shows the possible flags.
Flag Description DDOVER_ALPHADEST Uses the alpha information in the pixel format or the alpha channel surface attached to the destination surface as the alpha channel for the destination overlay. DDOVER_ALPHADESTCONSTOVERRIDE Uses the dwConstAlphaDest member in the DDOVERLAYFX structure as the destination alpha channel for this overlay. DDOVER_ALPHADESTNEG The NEG suffix indicates that the destination surface becomes more transparent as the alpha value increases. DDOVER_ALPHADESTSURFACEOVERRIDE Uses the lpDDSAlphaDest member in the DDOVERLAYFX structure as the alpha channel destination for this overlay. DDOVER_ALPHAEDGEBLEND Uses the dwAlphaEdgeBlend member in the DDOVERLAYFX structure as the alpha channel for the edges of the image that border the color key colors. DDOVER_ALPHASRC Uses the alpha information in the pixel format or the alpha channel surface attached to the source surface as the source alpha channel for this overlay. DDOVER_ALPHASRCCONSTOVERRIDE Uses the dwConstAlphaSrc member in the DDOVERLAYFX structure as the source alpha channel for this overlay. DDOVER_ALPHASRCNEG The NEG suffix indicates that the source surface becomes more transparent as the alpha value increases. DDOVER_ALPHASRCSURFACEOVERRIDE Uses the lpDDSAlphaSrc member in the DDOVERLAYFX structure as the alpha channel source for this overlay. DDOVER_HIDE Turns this overlay off. DDOVER_KEYDEST Uses the color key associated with the destination surface. DDOVER_KEYDESTOVERRIDE Uses the dckDestColorkey member in the DDOVERLAYFX structure 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 in the DDOVERLAYFX structure as the color key for the source surface. DDOVER_SHOW Turns this overlay on. DDOVER_ADDDIRTYRECT Adds a dirty rectangle to an emulated overlayed surface. DDOVER_REFRESHDIRTYRECTS Redraws all dirty rectangles on an emulated overlayed surface. DDOVER_REFRESHALL Redraws the entire surface on an emulated overlayed surface. DDOVER_DDFX Uses the overlay FX flags to define special overlay FX. DDOVER_AUTOFLIP Autoflips the overlay when ever the video port autoflips. DDOVER_BOB Displays each field of video port data individually without causing any jittery artifacts. DDOVER_OVERRIDEBOBWEAVE Indicates other interfaces should not override bob and weave operations. DDOVER_INTERLEAVED Indicates that the surface memory is composed of interleaved fields. DDOVER_BOBHARDWARE Indicates that hardware, not software or emulation, performs a bob operation. overlayFX**
Pointer to a DDOVERLAYFX structure that contains the overlay data.ddRVal**
Passes the DirectDraw return values.UpdateOverlay**
This member is used by DirectDraw and should not be filled in by the driver.
Requirements
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Ddrawi.h.
See Also
UpdateOverlay | DDRAWI_DIRECTDRAW_GBL | DDRAWI_DDRAWSURFACE_LCL | DDOVERLAYFX | DirectDrawSurface Structures
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