graphicsdeviceinterface/directgdi/src/directgdifont.cpp
author Matt Plumtree <matt.plumtree@nokia.com>
Fri, 23 Apr 2010 17:57:02 +0100
branchNewGraphicsArchitecture
changeset 39 a4b63488e0b0
parent 0 5d03bc08d59c
permissions -rw-r--r--
Revise some of the compositor performance improvements to improve correctness. Implement pixel blending using a variation of Jim Blinn's no-division blending algorithm. Move transparency type simplification further up the composition code. Remove some unnecessary fields. Output to YUV implementation needs revision as it is actually converting from YUV (copy of source conversion code).

// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//

#include "directgdifont.h"

/**
Construct calls the constructor for the base class CFbsFont and sets default
value of iCopy as EFalse.
*/
EXPORT_C CDirectGdiFont::CDirectGdiFont():
	CFbsFont(),
	iCopy(EFalse)
	{}

/**
Default destructor. 
*/
EXPORT_C CDirectGdiFont::~CDirectGdiFont()
	{}

/**
On return contains iAddress pointer for the CBitmapFont.
@return	A pointer to the font.
@see	CFbsFont::Address();
*/
EXPORT_C CBitmapFont* CDirectGdiFont::Address() const
	{
	return CFbsFont::Address();
	}

/**
Calls reset on the object (sets iHandle to zero) and carries out related 
messenger housekeeping and then duplicates it using the base class method.
@param	aHandle The integer handler for the font.
@return	KErrNone if successful, otherwise a system-wide error code.
@see	CFbsFont::Duplicate(TInt)
*/
EXPORT_C TInt CDirectGdiFont::Duplicate(TInt aHandle)
	{
	Reset();

	return CFbsFont::Duplicate(aHandle);
	}

/**
Resets the font to its default settings.
*/
EXPORT_C void CDirectGdiFont::Reset()
	{
	if (!iCopy)
		{
		CFbsFont::Reset();
		}
	else
		{
		iAddressPointer = NULL;
		iHandle = 0;
		iServerHandle = 0;
		iCopy = EFalse;
		}
	}

/**
Defines the meaning of the equals operator when acting on a CDirectGdiFont
object. It allows these objects to be set as being equal to one another.
@param	aFont The font to be copied.
*/
EXPORT_C void CDirectGdiFont::operator=(const CDirectGdiFont& aFont)
	{
	if (this != &aFont)
		{
		Reset();
		iAddressPointer = aFont.iAddressPointer;
		iHandle = aFont.iHandle;
		iServerHandle = aFont.iServerHandle;
		iCopy = ETrue;
		}
	}