Display Driver Samples (Windows Embedded CE 6.0)

Article
01/05/2012

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.

Display Driver Samples (Windows Embedded CE 6.0)

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