8月5日

DDGPE::BltPrepare 

This method is an extension to its counterpart, the GPE::BltPrepare method. With the addition of DDGPEStandard

Header, your driver has the flexibility to choose different accelerated blit routines based on information that cannot be specified by GPEBltParms, such as

 DDGPEPixelFormat, which you can pass in using one of the reserved DWORDs in DDGPEStandard

Header.

Syntax

virtual void BltPrepare(
  DDGPEBltParms* pddgpeBltParms
);

Parameters

pddgpeBltParms

Pointer to a DDGPEBltParms structure.

http://msdn.microsoft.com/en-us/library/ee483618(v=winembedded.60).aspx

DDGPE::AllocSurface 

This method is an extension of its counterpart, the GPE::AllocSurface method. With the addition of the pixelFormat parameter or the pddgpeAllocSurfaceData, your driver 

can allocate many different types of surfaces, instead of a limited number of GPE surface types.

Syntax
 

// Surface memory allocation
virtual SCODE AllocSurface(
  DDGPESurf** ppSurf,
  int width,
  int height,
  EGPEFormat format,
  int surfaceFlags
)=0;
virtual SCODE AllocSurface(
  DDGPESurf** ppSurf,
  int width,
  int height,
  EGPEFormat format,
  EDDGPEPixelFormat pixelFormat,
  int surfaceFlags
);
virtual SCODE AllocSurface(
  DDGPESurf** ppSurf,
  DDGPEAllocSurfaceData* pddgpeAllocSurfaceData 
);

Parameters

ppSurf

Pointer to a new DDGP ESurf object.

width

The desired width of the surface.

height
The desired height of the surface.

format

The desired format of the surface.

pixelFormat

The desired pixel format of the surface.

surfaceFlags

GPE surface flags for the surface.

http://msdn.microsoft.com/en-us/library/ee485068(v=winembedded.60).aspx