All Windows CE–based display drivers must implement the DDI functions listed here. However, only DrvEnableDriver must be exported from the display driver’s DLL, which means that only DrvEnableDriver must bear this exact name. You can customize the names for the other functions because they are exposed to the GDI through function pointers returned by DrvEnableDriver. Of course, no matter what names you give these functions, they must follow the prototypes in the Winddi.h header file.
Function |
Description |
| DrvAnyBlt | Bit block transfer, with stretching or transparency. |
| DrvBitBlt | General bit block transfer, with clipping and masking. |
| DrvContrastControl | Enables software adjustment of the display hardware’s contrast. |
| DrvCopyBits | Sends a GDI-created print band to a printer driver. |
| DrvCreateDeviceBitmap | Creates and manages bitmaps. |
| DrvDeleteDeviceBitmap | Deletes a device bitmap. |
| DrvDisableDriver | Notifies the display driver that the GDI no longer needs it and is ready to unload the driver. |
| DrvDisablePDEV | Notifies the driver that the GDI no longer needs a particular display device. |
| DrvDisableSurface | Notifies the driver that the GDI no longer needs a particular drawing surface. |
| DrvEnableDriver | The initial entry point exposed by the driver, which returns pointers to the other DDI functions to the GDI. |
| DrvEnablePDEV | Returns a PDEV structure, a logical representation of a physical display device, to the GDI. |
| DrvEnableSurface | Creates a drawing surface and associates it with a PDEV. |
| DrvEndDoc | Sends any control information needed to finish printing a document. |
| DrvEscape | Used for retrieving information from a device that is not available in a device-independent DDI. This function is the same as in Windows NT, except that Windows CE does not support the DrvDrawEscape function. |
| DrvFillPath | Fills a drawing path with a brush. |
| DrvGetMasks | Gets the color masks for the display device’s current mode. |
| DrvGetModes | Lists the display modes supported by the display device |
| DrvMovePointer | Moves the pointer with a guarantee that the GDI will not interfere with the operation. |
| DrvPaint | Paints a specified region with a brush. |
| DrvPowerHandler | Called to handle POWER_UP and POWER_DOWN notifications. |
| DrvQueryFont | Gets font metric information. |
| DrvRealizeBrush | Creates a brush with parameters specified by the GDI. |
| DrvRealizeColor | Maps an RGB color onto the closest available color supported by the device. |
| DrvSetPalette | Sets the display device’s palette. |
| DrvSetPointerShape | Sets the pointer to a new shape and updates the display. |
| DrvStartDoc | Sends any control information needed to start printing a document. |
| DrvStartPage | Sends any control information needed to start printing a new page. |
| DrvStrokePath | Renders a drawing path. |
| DrvTransparentBlt | Bit block transfer, with transparency. |
| DrvUnrealizeColor | Maps a color in the display device’s format onto an RGB value. |