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Display Driver Samples (Windows Embedded CE 6.0)

1/6/2010

Sample code for the sample drivers is in %_WINCEROOT%\Public\Common\OAK\Drivers\Display. For the sample display drivers, software acceleration is provided through emulation libraries, and hardware acceleration is limited to two-dimensional graphics operations.

These samples include:

The following table shows files to help you work with monolithic and GPE-based display drivers.

File Description

Winddi.h

Contains the core definitions for display and printer device drivers.

Use this file if you are creating a monolithic driver because it describes the entry points, data types, and symbolic constants you need to receive and process drawing requests from GWES.

This file also contains important definitions for you, if you are using GPE. Many GWES data structures propagate through the GPE layer into the GPE objects.

Emul.h

Describes the set of raster drawing helpers inside the raster emulation library.

Creating fast raster output is very important, because more than 95 percent of the pixels on a display screen are drawn using raster drawing calls.

The emulation library provides a reasonably good solution for drawing raster data in software. However, if your display device can perform drawing using accelerated hardware, consider using the hardware in place of the raster emulation library.

GPE.h

Contains the basic set of data structures and symbol definitions you need to use the GPE library.

GPE source files

Contains GPE source files.

Located in %_WINCEROOT%\Public\Common\OAK\Drivers\Display.

The following table shows the features supported by the ATI and MQ200 display drivers.

Element ATI MQ200

Driver name

Ddi_ragexl.dll

Ddi_mq200.dll

Environment variable

BSP_DISPLAY_RAGEXL

BSP_DISPLAY_MQ200

Path to source code

%_WINCEROOT%\Public\Common\OAK\Drivers\Display\ATI

%_WINCEROOT%\Public\Common\OAK\Drivers\Display\MQ200

Color support

Yes

Yes

Bit depths

16 bpp

16 bpp

Display resolution

640x480

720x480

800x600

1024x768

1280x1024

640x480

800x600

1024x768

1152x864

1280x1024

Software acceleration

Yes

Yes

Hardware acceleration

Yes

Yes

Line routines

Software and hardware

Software and hardware

Blit routines

Software and hardware

Software and hardware

Mouse cursor

Hardware

Hardware

Antialiased text support

Yes

Yes

Dirty rectangle driver

No

No

Hardware platform restrictions

 

 

The following table shows the features supported by the VGA flat and VGA rotation-enabled.

Element VGA flat VGA RFLAT

Driver name

Ddi_flat.dll

Ddi_rflat.dll

Environment variable

BSP_DISPLAY_FLAT

BSP_DISPLAY_FLAT

Path to source code

%_WINCEROOT%\Public\Common\OAK\Drivers\Display\VGAFLAT

%_WINCEROOT%\Public\Common\OAK\Drivers\Display\RFLAT

Color support

Yes

Yes

Bit depths

8, 16, 24, & 32 bpp

8, 16, 24, & 32 bpp

Display resolution

No restrictions aside from hardware limits and as supported by VESA BIOS

No restrictions aside from hardware limits and as supported by VESA BIOS.

Software acceleration

Yes

Yes

Hardware acceleration

No

No

Line routines

Software

Software

Blit routines

Software

Software

Mouse cursor

Software

Software

Antialiased text support

Yes

Yes

Dirty rectangle driver

No

No

Hardware platform restrictions

x86 only

x86 only

Notes

Requires VESA BIOS version 2.0 or later.

Run Vesatest.exe to verify compatibility and needed modes.

Requires VESA BIOS version 2.0 or later.

Run Vesatest.exe to verify compatibility and needed modes.

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