// Copyright (c) 2008-2009 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 CONFIGHELPER_H_

#define CONFIGHELPER_H_

#include <e32def.h>

#include <EGL/egl.h>

class CFbsBitmap;

/**

Utility class to help in choosing an EGL config.

@internalComponent Reference implementation.

*/

NONSHARABLE_CLASS(TConfigHelper)

	{

	/**

	Enumeration of EGL Config Config Attribute indices into KSurfaceAttribs.

	*/

	enum 

		{

		EEglBufferSize = 0,

		EEglBufferType = 2,

		EEglRedSize = 4,

		EEglGreenSize = 6,

		EEglBlueSize = 8,

		EEglAlphaSize = 10,

		EEglLuminanceSize = 12,

		EEglSurfaceType = 14,

		EEglRenderableType = 16,

		ELast,

		};

	/**

	 Enumeration of EGL Config indices into KSurfaceAttribs.

	 */

	enum

		{ 

		EPixmapAttribsColor64K,

		EPixmapAttribsColor16MAP,

		EPixmapAttribsColor16MU,

		EPixmapAttribsColor16MA,

		EPixmapAttribsLuminance8L,

		EPixmapAttribsLuminance1L      

		};

public:

	static TInt GetSuitablePixmapConfigIndex(EGLDisplay aDisplay, EGLConfig *aConfigs, TInt aNumConfigs, TInt aColorAttrib);

	static TInt MatchPixelType(TInt aPixelType);

	static TInt GetConfig(TInt aAttributeArrayIndex, EGLConfig& aResult);

	static TInt GetConfigForFbsBitmap(const CFbsBitmap& aBitmap, EGLConfig& aResult);

#ifdef _DEBUG

	static void SupportedSurfacePixelFormatsL();

#endif

private:

	static TBool EglAttributeMatches(EGLint aAttribute, TInt aExpected, TInt aActual);

public:

	static const EGLint KSurfaceAttribs[][19];

	};

#endif /*CONFIGHELPER_H_*/