Intel 82854 GMCH, 82830M GMCH manual Programming Interface, WinCE Graphics Driver Escape Interface

7Programming Interface

7.1WinCE Graphics Driver Escape Interface

The Intel® Digital Set Top Box Graphics Driver for Microsoft Windows CE .NET 4.2/5.0 supports the WinCE system API - ExtEscape(), which provides a dynamic configuration channel to the display driver.

Following shows the ExtEscape API function prototype and the usage module for the user application to communicate with the display driver.

ExtEscape(

HDC <Handle to graphic device context>,

int <Escape Code supported by the display driver>

Note: see below table of the list of the supported escape codes by the display

driver

int <size of the escape code specific input data structure by number of bytes>,

LPCSTR <pointer of input data buffer of BYTE>

Note: Please note that LPCSTR does not imply the input data buffer is anything related to “string”, which means a long constant pointer of char (BYTE) buffer. User need convert the escape code specific input data structure pointer to LPCSTR

int <size of the escape code specific output data structure by number of bytes>,

LPSTR <pointer of input data buffer of BYTE - “Input Data Structure”>

Note: Similar like LPCSTR, LPSTR does not imply the output data buffer is anything related to “string”, which means a long pointer of char (BYTE) buffer. User need convert the escape code specific output data structure pointer to LPSTR.

);

After the Graphics driver is installed, three *.h files (icegd_public_escape.h, igd_pd.h and

igd_public.h) can be found under the directory: \WINCE500\IntelCEG\Drivers\Display\I8xx\Extras\Src\Inc.

The file video.reg can be found under the directory: \WINCE500\IntelCEG\Drivers\Display\I8xx.

User’s Guide for Microsoft* Windows* CE 5.0