// Copyright (c) 2010 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:

// Guest Egl Header file

#ifndef __GUEST__EGL_H

#define __GUEST__EGL_H

// CLASS DECLARATION

typedef enum

	{

    EPixmapTypeNone,

    EPixmapTypeFbsBitmap,

    EPixmapTypeSgImage,

	} TSymbianPixmapTypeId;

typedef enum

	{

	ESurfaceTypeWindow = 0,

	ESurfaceTypePbuffer = 1,

	ESurfaceTypePixmapFbsBitmap = 2,

	ESurfaceTypePixmapSgImage = 3,

	} TEglSurfaceType;

class RSurfaceManager;

class CEglContext;

// client side info about a surface

struct TSurfaceInfo

    {

    TSize                   iSize;

    TEglSurfaceType         iSurfaceType; //Surface type

    EGLConfig               iConfigId;

    CFbsBitmap*             iFbsBitmap;       // Handle for CFbsBitmap

#ifdef FAISALMEMON_S4_SGIMAGE

    RSgDrawable             iSgHandle;        // Handle for RSgImge - keeps image open

    TSgDrawableId           iSgId;            // SgImage Id - to detect 2nd attempted surface using the same SgImage 

#endif

    EGLSurface              iHostSurfaceId;

	// Note: most member data is only used by Window surfaces

    TSurfaceId              iSurfaceId;        /*<! Target system surface allocated by EGL.                                              */

    // FAISALMEMON HOLE 0

    RSurfaceManager			iSurfaceManager;

    RSurfaceUpdateSession	iSurfaceUpdateSession;

    void*                   iBuffer0;          /*<! Pointer to the first buffer pixels                                                   */

    void*                   iBuffer1;          /*<! Pointer to the second buffer pixels                                                  */

    TInt                    iBuffer0Index;          /*<! Pointer to the first buffer pixels                                                   */

    TInt                    iBuffer1Index;          /*<! Pointer to the second buffer pixels                                                  */

    RChunk                  iChunk;            /*<! chunk of the backbuffer surface memory                                               */

    TInt					iFrontBuffer;		// We assume zero based index, 0 -> iBuffer0, 1 -> iBuffer1 should be display

    RWindow*                iNativeWindow;

    EGLint                  iRedBits;

    EGLint                  iGreenBits;

    EGLint                  iBlueBits;

    EGLint                  iAlphaBits;

    EGLenum                 iAlphaFormat;

    EGLint                  iColorBits;

    EGLint                  iStride;

    // FAISALMEMON HOLE 2

    };

// Container for Symbian client side information about an EGL Display

NONSHARABLE_CLASS(CEglDisplayInfo) : public CBase

	{

public:

	TBool                              iInitialized;

//	RMutex                             iSurfaceMapLock;

    RHashMap<TInt, TSurfaceInfo*>      iSurfaceMap;

//private:

//	RMutex                             iContextMapLock;

    RHashMap<EGLContext, CEglContext*> iContextMap;

    };

// prototype to help eglGetProcAddress() API 

typedef void (*ProcPointer)(...);

// Collection of static functions for processing EGL Attribute Lists

class TAttribUtils

	{

public: // definitions in eglattribs.cpp

	static TInt AttribListLength(const EGLint* aAttribList);

	static const EGLint* FindAttribValue(const EGLint* aAttribList, EGLint aAttrib);

	// NB only use these on AttribLists with adequate space for editing

	static EGLint* FindAttribValue(EGLint* aAttribList, EGLint aAttrib);

	static void AppendAttribValue(EGLint* aAttribList, EGLint aAttrib, EGLint aValue);

	static void RemoveAttrib(EGLint* aAttribList, EGLint aAttrib);

#ifdef _DEBUG

	// definitions in egldebug.cpp

	static void TraceAttribList(const EGLint* aAttribList);

	static void TraceAttribNames(EGLint aAttrib, EGLint aValue, char** aAttrName, char** aValueName);

	static void TraceGetAttrib(char* aApiName, char* aObjType, EGLDisplay aDisplay, EGLint aObject, EGLint aAttribute, EGLint *aValue, EGLBoolean aResult);

	static void TraceSetAttrib(char* aApiName, char* aObjType, EGLDisplay aDisplay, EGLint aObject, EGLint aAttribute, EGLint aValue);

#endif

	};

// CEglContext represents an EGLContext on Host EGL

NONSHARABLE_CLASS(CEglContext) : public CBase

	{

public:

	// factory function

	static CEglContext* Create(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, CEglContext* aShareContext, const EGLint* aAttribList);

	EGLBoolean MakeCurrent(TEglThreadState& aThreadState, EGLSurface aDraw, EGLSurface aRead);

	EGLBoolean QueryAttribute(TEglThreadState& aThreadState, EGLint aAttribute, EGLint* aValue);

	// These functions return ETrue if they delete themselves 

	TBool Destroy(TEglThreadState& aThreadState);

	TBool MakeNotCurrent(TEglThreadState& aThreadState);

	EGLContext ShareContextFamily();

	inline EGLContext HostContext() { return iHostContext; }

	inline EGLContext ClientContext() { return iHostContext; }

	inline TBool IsDestroyed() { return iIsDestroyed; }

private:

	CEglContext(EGLDisplay aDisplay, EGLConfig aConfig, EGLContext aShareContextFamily, EGLenum aRenderingApi, EGLint aGlesClientVersion);

	void Delete(TEglThreadState& aThreadState);

	~CEglContext();

private:

	RMutex     iCtxMutex;

	TBool      iFirstUse;    // for eglMakeCurrent

	EGLContext iHostContext; // corresponding Host EGL Context

	// info from eglCreateContext & eglMakeCurrent

	EGLDisplay iDisplay;

	EGLContext iShareContextFamily;

	EGLConfig  iConfigId;     // Config id used to create context

	EGLenum    iRenderingApi; // set by current bound API at creation

	EGLSurface iDrawSurface;  // currently bound draw surface, if any

	// for GL ES Contexts

	EGLSurface iReadSurface;  // currently bound read surface, if any

	EGLint     iGlesClientVersion; // set by EGL_CONTEXT_CLIENT_VERSION attribute at creation (default is 1)

	// object lifetime management

	TBool      iIsDestroyed;

	};

NONSHARABLE_CLASS(CEglImage) : public CBase

	{

public:

	CEglImage();

	~CEglImage();

#ifdef FAISALMEMON_S4_SGIMAGE 

	inline void Create(TSgDrawableId aSgImageId, EGLDisplay aDisplay, TSgImageInfo& aSgImageInfo, TInt aPbufferHandle, VGHandle aVgHandle);

	TSgDrawableId SgImageId() const;

#endif

	inline void Duplicate();

	inline TBool OpenForVgImage(TSize& aSize, VGHandle& aVgHandle, TUint64& aSgImageId);

	inline TBool Close();

	inline TBool Destroy();

	inline TBool IsDestroyed() const;

	inline TInt RefCount();

	inline EGLDisplay Display() const;

private:

#ifdef FAISALMEMON_S4_SGIMAGE

	RSgDrawable  iSgHandle;				// Client Handle

	TSgImageInfo iSgImageInfo;

#endif

	EGLDisplay   iDisplay;

	TInt         iPbufferHandle;		// Handle of the underlying Pbuffer, if any

	VGHandle     iVgHandle;				// Handle of the underlying Host VgImage, if any

	TInt         iCreateCount;

	TInt         iOpenCount;

	TBool        iIsDestroyed;

	};

const TInt KEglConfigSize = 29;

class XGuestEglInitialiser

	{

public:

	XGuestEglInitialiser();

	~XGuestEglInitialiser();

	};

/**

 *  CCGuestEGL

 *

 */

NONSHARABLE_CLASS(CGuestEGL) : public CBase, public MEglManagementApi,

		public MVgApiForEgl, public MGles11ApiForEgl, public MGles2ApiForEgl

    {

public:

    // Constructors and destructor

    /**

     * Destructor.

     */

    ~CGuestEGL();

    /**

     * Public constructor.

     */

    static CGuestEGL* New();

	// class MEglManagementApi - exported as a vtable via CVghwUtils for Open VG and Open GL ES to access EGL info

	virtual TBool EglImageOpenForVgImage(EGLImageKHR aImage, TSize& aSize, VGHandle& aVgHandle, TUint64& aSgImageId);

	virtual void EglImageClose(EGLImageKHR aImage);

	// Private interfaces for EGL to call into Open VG & Open GL ES 

	// class MVgApiForEgl - redirects via CVghwUtils to exported functions from Open VG

	virtual ExtensionProcPointer guestGetVgProcAddress (const char *aProcName);

	// class MGles11ApiForEgl - redirects via CVghwUtils to exported functions from Open GL ES 1.1

	virtual ExtensionProcPointer guestGetGles11ProcAddress (const char *aProcName);

	// class MGles2ApiForEgl - redirects via CVghwUtils to exported functions from Open GL ES 2

	virtual ExtensionProcPointer guestGetGles2ProcAddress (const char *aProcName);

	// public support functions for EGL C API

	static EGLint CheckColorAttributes(const EGLint* aAttribList, EGLint aColorBufferType, EGLint aLuminanceBits,

			EGLint aRedBits, EGLint aGreenBits, EGLint aBlueBits, EGLint aAlphaBits=0);

	static void AppendColorAttributes(EGLint* aAttribList, EGLint aColorBufferType, EGLint aLuminanceBits, EGLint aRedBits,

			EGLint aGreenBits, EGLint aBlueBits, EGLint aAlphaBits=0, TBool aSetVgPreMultAlpha=EFalse);

	const char *QueryExtensionList();

	// ToDo probably remove this after EGL Sync refactoring

	void SetError( EGLint aError );

	void DestroySurfaceInfo(EGLDisplay aDisplay, EGLSurface aSurface);

	// static functions directly implementing an EGL API

	ProcPointer eglGetProcAddress(const char *aProcName);

	// functions directly implementing an EGL API

	EGLBoolean eglBindTexImage(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, EGLint aBuffer);

	EGLBoolean eglChooseConfig(TEglThreadState& aThreadState, EGLDisplay aDisplay, const EGLint *aAttribList,

				   EGLConfig *aConfigs, EGLint aConfigSize, EGLint *aNumConfig);

	EGLBoolean eglCopyBuffers(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, EGLNativePixmapType aTarget);

	EGLContext eglCreateContext(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig,

					EGLContext aShareContext, const EGLint *aAttribList);

	EGLImageKHR eglCreateImageKHR(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLContext aContext, EGLenum aTarget,

			EGLClientBuffer aBuffer, const EGLint *aAttribList);

	EGLSurface eglCreatePbufferFromClientBuffer(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLenum aBufType,

			EGLClientBuffer aBuffer, EGLConfig aConfig, const EGLint *aAttribList);

	EGLSurface eglCreatePbufferSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, const EGLint *aAttribList);

	EGLSurface eglCreatePixmapSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, 

			EGLNativePixmapType aNativePixmap, const EGLint *aAttribList);

	EGLSurface eglCreateWindowSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, 

			EGLNativeWindowType aNativeWindow, const EGLint *aAttribList);

	EGLBoolean eglDestroyContext(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLContext aContext);

	EGLBoolean eglDestroyImageKHR(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLImageKHR aImage);

	EGLBoolean eglDestroySurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface);

	EGLBoolean eglGetConfigAttrib(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig,

				      EGLint aAttribute, EGLint *aValue);

	EGLBoolean eglGetConfigs(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig *aConfigs,

				 EGLint aConfigSize, EGLint *aNumConfig);

	EGLContext eglGetCurrentContext(TEglThreadState& aThreadState);

	EGLDisplay eglGetCurrentDisplay(TEglThreadState& aThreadState);

	EGLSurface eglGetCurrentSurface(TEglThreadState& aThreadState, EGLint aReadDraw);

	EGLDisplay eglGetDisplay(TEglThreadState& aThreadState, EGLNativeDisplayType aDisplayId);

	EGLBoolean eglInitialize(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLint *aMajor, EGLint *aMinor);

	EGLBoolean eglMakeCurrent(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aDraw, EGLSurface aRead,

			EGLContext aContext);

	EGLBoolean eglQueryContext(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLContext aContext, EGLint aAttribute, EGLint *aValue);

	const char* eglQueryString(EGLDisplay aDisplay, EGLint aName);

	EGLBoolean eglQuerySurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, EGLint aAttribute,

			EGLint *aValue);

	EGLBoolean eglReleaseTexImage(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, EGLint aBuffer);

	EGLBoolean eglSurfaceAttrib(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface,

				    EGLint aAttribute, EGLint aValue);

	EGLBoolean eglSwapBuffers(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface);

	EGLBoolean eglSwapInterval(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLint aInterval);

	EGLBoolean eglTerminate(TEglThreadState& aThreadState, EGLDisplay aDisplay);

	EGLBoolean eglWaitClient(TEglThreadState& aThreadState);

public:

    // API supporting EGL sync extension

    /*-------------------------------------------------------------------*//*!

     * \brief   Query and request to lock a specified display

     * \ingroup eglSync

     * \param   aEglDisplay a display identifier

     * \return  EGL_SUCCESS if successful;

     *          EGL_BAD_DISPLAY is not a name of a valid EGLDisplay

     *          EGL_NOT_INITIALIZED if the display object associated

     *          with the <aEglDisplay> has not been initialized

     *//*-------------------------------------------------------------------*/

    EGLint FindAndLockDisplay(EGLDisplay aDisplay);

    /*-------------------------------------------------------------------*//*!

     * \brief   Releases the lock associated with a valid EGLDisplay

     * \ingroup eglSync

     * \param   aEglDisplay a display identifier

     *//*-------------------------------------------------------------------*/

    void ReleaseDisplayLock(EGLDisplay aDisplay);

    /*-------------------------------------------------------------------*//*!

     * \brief   Returns pointer to the EGL sync instance

     * \ingroup eglSync

     *//*-------------------------------------------------------------------*/

    CEglSyncExtension* EGLSyncExtension();

private:

    /**

     * private constructor, 2nd phase constructor

     */

	CGuestEGL();

	void Create();

	void CloseSgResources();

	void OpenSgResources();

	// private function with "EglInternalFunction_" prefix

	TBool EglInternalFunction_CreateSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, EGLConfig aConfig, RWindow* aNativeWindow, TSurfaceInfo& aSurfaceInfo);

	void EglInternalFunction_DestroyWindowSurface(TSurfaceInfo& aSurfaceInfo);

	TUidPixelFormat EglInternalFunction_GetSymbianPixelFormat(const TSurfaceInfo& aSurfaceInfo);

	EGLBoolean EglInternalFunction_CallSetSurfaceParams(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, TSurfaceInfo& aSurfaceInfo);

	TBool EglInternalFunction_PixmapSurfacePreviouslyCreated(EGLNativePixmapType pixmap, TSymbianPixmapTypeId pixmapType);

	static TSymbianPixmapTypeId EglInternalFunction_GetNativePixmapType(EGLNativePixmapType pixmap);

	const char* EglInternalFunction_QueryExtensionList();

	TBool EglInternalFunction_IsValidNativePixmap(EGLNativePixmapType pixmap, TSymbianPixmapTypeId pixmapType);

	EGLBoolean EglInternalFunction_SurfaceResized(TEglThreadState& aThreadState, TSurfaceInfo& aSurfaceInfo, EGLDisplay aDisplay, EGLSurface aSurface);

	TSurfaceInfo* EglInternalFunction_GetPlatformSurface( EGLDisplay display, EGLSurface surface );

	void EglInternalFunction_AbortWindowInit(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface, TSurfaceInfo* ps, RWindow* window, CWsScreenDevice* screenDevice);

	TBool EglInternalFunction_SwapWindowSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLSurface aSurface);

	TBool EglInternalFunction_MetaGetConfigs( TEglThreadState& aThreadState, EGLConfig*& aConfigs, EGLint& aConfigCnt, EGLint*& aConfigAttribs, EGLint& aConfigAttribsLen, TMetaGetConfigsMode aFetchMode = EMetaGetConfigsSg );

	// more private functions

	EGLint ConfigMatchesFbsBitmapPixmap(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, const EGLint* aAttribList, TDisplayMode aMode);

	EGLBoolean ChooseConfigForPixmapSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, const EGLint* aAttribList, EGLConfig* aConfigs, EGLint aConfigSize,

			EGLint* aNumConfig, const void* aPixmap);

	EGLSurface CreateFbsBitmapSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, CFbsBitmap* aBitmap, const EGLint *aAttribList, TSurfaceInfo& aSurfaceInfo);

	EGLint ChooseConfigAttribsForFbsBitmap(TEglThreadState& aThreadState, const EGLint* aAttribList, const CFbsBitmap* aBitmap, EGLint** aNewList);

	EGLint ValidateEglImageTarget(EGLDisplay aDisplay, EGLContext aContext, EGLenum aTarget,

			EGLClientBuffer aBuffer, const EGLint *aAttribList, TSymbianPixmapTypeId aTargetPixmapType);

	TBool CreateDisplayInfo(EGLDisplay aDisplay);

	TBool InitializeDisplayInfo(EGLDisplay aDisplay);

	TBool IsDisplayInitialized(EGLDisplay aDisplay);

	TBool DestroyDisplayInfo(EGLDisplay aDisplay);

#ifdef FAISALMEMON_S4_SGIMAGE

    EGLSurface CreateSgImageSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, EGLConfig aConfig, const RSgImage* aSgImage, const EGLint *aAttribList,

			TSurfaceInfo& aSurfaceInfo);

    EGLImageKHR CreateNewEglImage(TEglThreadState& aThreadState, EGLDisplay aDisplay, TSgDrawableId aSgId, TSgImageInfo aSgImageInfo);

    EGLImageKHR DuplicateEglImageIfItExists(EGLDisplay aDisplay, TSgDrawableId aSgId);

    EGLint ChooseConfigAttribsForSgImage(TEglThreadState& aThreadState, const EGLint* aAttribList, const RSgImage* aSgImage, EGLint** aNewList);

    EGLBoolean ChooseConfigForNativeSgImagePixmapSurface(TEglThreadState& aThreadState, EGLDisplay aDisplay, const EGLint* aAttribList, EGLConfig* aConfigs, EGLint aConfigSize,

			EGLint* aNumConfig, const EGLint* aPixmap);

#endif

private:

	//new methods supporting EGL Sync extension

	EGLint InitialiseExtensions();

private:

	RReadWriteLock				 iDisplayMapLock; // protects the iDisplayMap for multi-threaded clients

	RHashMap<TInt, CEglDisplayInfo*> iDisplayMap;

	RMutex                       iEglImageLock; // protects the iEglImageArray for multi-threaded clients

	RPointerArray<CEglImage>     iEglImageArray; // ToDo use a Unique Id for the index/handle, rather than the object address

#ifdef FAISALMEMON_S4_SGIMAGE

	EGLint* iSgConfigAttribs;

	EGLint  iSgConfigsAttribtCnt;

	// ToDo (SgImage Design Spec 3.5) ARM EGL should maintain its own lists of native window handles, pixmap handles etc

	char* iEglExtnNameList; // supporting data for eglQueryString()

    RSgDriver                    iSgDriver;

#endif

	//data members supporting EGL Sync extension

	CEglSyncExtension* iEglSyncExtension;

	// vtable pointers populated from CVghwUtils - to access Open VG & GL ES internals, e.g. to support eglGetProcAddress

	MVgApiForEgl*        iVgApiForEgl;

	MGles11ApiForEgl*    iGles11ApiForEgl;

	MGles2ApiForEgl*     iGles2ApiForEgl;

	};

/* Execute host EGL functions that cannot fail

   These functions do not set the flag to say that an EGL command has been executed since the last host eglGetError.

   */

inline EGLContext ExecEglContextNoErrorCmd(TEglThreadState& aThreadState, EglRFC& aEglApiData)

	{

	aThreadState.ExecuteEglNeverErrorCmd(aEglApiData);

	return (EGLContext) aEglApiData.ReturnValue();

	}

inline EGLSurface ExecEglSurfaceNoErrorCmd(TEglThreadState& aThreadState, EglRFC& aEglApiData)

	{

	aThreadState.ExecuteEglNeverErrorCmd(aEglApiData);

	return (EGLSurface) aEglApiData.ReturnValue();

	}

inline EGLDisplay ExecEglDisplayNoErrorCmd(TEglThreadState& aThreadState, EglRFC& aEglApiData)

	{

	aThreadState.ExecuteEglNeverErrorCmd(aEglApiData);

	return (EGLDisplay) aEglApiData.ReturnValue();

	}

#endif // __GUEST__EGL_H