AlphaBlend API (Windows CE 5.0)

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This Catalog item adds the function AlphaBlend to the Graphics Device Interface (GDI) and the Graphics Primitive Engine (GPE).

The AlphaBlend function displays bitmaps that have transparent or semitransparent pixels.

Implementation Considerations

The following table shows the Sysgen variables that enable the AlphaBblend API.

Sysgen variable Description
SYSGEN_GDI_ALPHABLEND Set this Sysgen to enable the AlphaBlend function.

Modules and Components

The following table shows the components and modules that implement DirectDraw.

Item Module Component
AlphaBlend API mgalphablend None

Hardware Considerations

AlphaBlend API does not require special display hardware, though it can use hardware acceleration if it is available. It can be supported in software.

Dependencies

The following table lists the Catalog item dependencies that most directly relate to this item's functionality. There are additional dependencies as well. For more information on determining the complete list of dependencies for this Catalog item, see Catalog Item Dependencies.

Catalog Item Sysgen variable
Minimal GDI Configuration SYSGEN_MINGDI
Minimal GWES Configuration SYSGEN_MINGWES
Minimal Input Configuration SYSGEN_MININPUT

See Also

Graphics | GPE Base Classes

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