diff -r 4816d766a08a -r f345bda72bc4 Symbian3/PDK/Source/GUID-0C3A4156-E5CF-55F9-91A0-A7961FDEE030.dita --- a/Symbian3/PDK/Source/GUID-0C3A4156-E5CF-55F9-91A0-A7961FDEE030.dita Tue Mar 30 11:42:04 2010 +0100 +++ b/Symbian3/PDK/Source/GUID-0C3A4156-E5CF-55F9-91A0-A7961FDEE030.dita Tue Mar 30 11:56:28 2010 +0100 @@ -1,41 +1,41 @@ - - - - - -LCD -Extension Architecture -

This topic describes the architecture of the LCD Extension.

-

The LCD Extension (or video driver) is implemented as a standard kernel -extension and is loaded by the kernel at boot time.

-

The public interface to the LCD Extension is accessed through the User-Side -Hardware Abstraction (HAL) interfaces HAL::Get() and HAL::Set(). -The LCD Extension registers itself with the kernel as the handler for the EHalGroupDisplay function -group and implements the functions.

-

From Symbian^3 there is a new graphics architecture called ScreenPlay. -When ScreenPlay is in use, the Display -Channel Driver can provide a logical device driver proxy between the -Composition Implementation and the LCD Extension. However, the use of the -Display Channel Driver is optional and implementers may decide not to use -it.

-

When ScreenPlay is not in use, the Graphics Screen -Driver component is a client of the LCD Extension. The Screen Driver -is platform-specific and must be ported by the device creator.

-

The Text Window Server also implements a version of the Screen Driver for -a simple console user interface.

-
-The ScreenPlay -Graphics Architecture -The Non-ScreenPlay - Graphics Architecture -Display Channel -Driver -Screen Driver - Component + + + + + +LCD +Extension Architecture +

This topic describes the architecture of the LCD Extension.

+

The LCD Extension (or video driver) is implemented as a standard kernel +extension and is loaded by the kernel at boot time.

+

The public interface to the LCD Extension is accessed through the User-Side +Hardware Abstraction (HAL) interfaces HAL::Get() and HAL::Set(). +The LCD Extension registers itself with the kernel as the handler for the EHalGroupDisplay function +group and implements the functions.

+

From Symbian^3 there is a new graphics architecture called ScreenPlay. +When ScreenPlay is in use, the Display +Channel Driver can provide a logical device driver proxy between the +Composition Implementation and the LCD Extension. However, the use of the +Display Channel Driver is optional and implementers may decide not to use +it.

+

When ScreenPlay is not in use, the Graphics Screen +Driver component is a client of the LCD Extension. The Screen Driver +is platform-specific and must be ported by the device creator.

+

The Text Window Server also implements a version of the Screen Driver for +a simple console user interface.

+
+The ScreenPlay +Graphics Architecture +The Non-ScreenPlay + Graphics Architecture +Display Channel +Driver +Screen Driver + Component
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