graphicsdeviceinterface/gdi/sgdi/BidiCompact.h
author William Roberts <williamr@symbian.org>
Thu, 03 Jun 2010 17:39:46 +0100
branchNewGraphicsArchitecture
changeset 87 0709f76d91e5
parent 0 5d03bc08d59c
permissions -rw-r--r--
Add MMP files to build libOpenVG_sw.lib which uses LINKAS to redirect to libOpenVG.dll (and the same for libEGL_sw.lib and libOpenVGU_sw.lib). Only the libEGL_sw.lib redirection isn't activated - this can't happen until there is a merged libEGL.dll which supports the OpenWF synchronisation and also implements the graphical support functions. The overall aim is to eliminate the *_sw.dll implementations, at least as a compile-time way of choosing a software-only implementation.The correct way to choose is to put the right set of libraries into a ROM with suitable renaming, and in the emulator to use the "switching DLL" technique to pick the right set. As the Symbian Foundation doesn't have any alternative implementations, we don't need the switching DLLs and we can build directly to the correct name.

// Copyright (c) 2002-2009 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:
//

#ifndef BIDICOMPACT_H_
#define BIDICOMPACT_H_

#include <e32std.h>
#include <bidi.h>

class TRunInfoCompact
/**
Stores information about a run and how to re-order it.
@internalTechnology
*/
	{
public:
	/** Describes text to be re-ordered.
	@internalTechnology */
	class TReorderingContext
		{
	public:
		/** Where the logical-order text starts. */
		const TText* iSource;
		/** The start of the line. */
		TInt iStart;
		/** One past the end of the line. */
		TInt iEnd;
		/**
		 * Truncation character, if there is to be one on this line. Otherwise,
		 * 0xFFFF.
		 */
		TChar iTruncation;
		/** ETrue if the line must join at its beginning. */
		TBool iJoinsAtStart;
		/** ETrue if the line must join at its end. */
		TBool iJoinsAtEnd;
		};
	
	/** How to re-order the run.
	@internalTechnology */
	enum TTypeFlags
		{
		/** Reverse the run, but not surrogate pairs or combining characters. */
		EFRightToLeft = 0x80000000,
		/** Simply reverse the run, do not check for surrogates or combiners. */
		EFNoPairsNoCombiners = 0x40000000,
		/** No mirrored characters are present. */
		EFNoMirroredCharacters = 0x20000000
		};
	
	/**	Sets up an empty run.
	@internalTechnology */
	TRunInfoCompact() : iStart(0), iLengthAndType(0) {}
	TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse,
		const TText* aText);
	TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse);
	TBool AddRun(const TRunInfoCompact& aToBeAdded);
	TText* Reorder(TText* aDestination, const TReorderingContext& aContext) const;

	/**	@return The start of this run.
	@internalTechnology */
	TInt Start() const { return iStart; }

	/**@return The length of this run.
	@internalTechnology */
	TInt Length() const { return static_cast<TInt>(iLengthAndType & 0x0FFFFFFF); }

	/** @return The flags associated with this run.
	@internalTechnology */
	TInt TypeFlags() const { return iLengthAndType & 0xF0000000; }

	static TInt Convert(TRunInfoCompact* aBuffer, const TDesC& aText,
		const TBidirectionalState::TRunInfo* aRunArray, TInt aArraySize);
	static TBool JoinBefore(const TText* aText, TInt aIndex);
private:
	TInt iStart;
	TUint iLengthAndType;
	};

#endif