1 /*

     2 * Copyright (c) 2010 ISB.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Symbian Foundation License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * ISB - Initial contribution

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 #ifndef ECAMWEBCAMERAVFACTIVE_H

    19 #define ECAMWEBCAMERAVFACTIVE_H

    20 

    21 #include "ecamwebcameraplugin.h"

    22 

    23 /**

    24  *  Perform a viewfinder function.

    25  */

    26 class CWebCameraVfActive : public CActive

    27 						 , public MDirectScreenAccess

    28 	{

    29 public:

    30 	 /**

    31      * Two-phased constructor.

    32      * @param aOwner pointer to callback object.

    33      * @param aDriver reference to driver.

    34      */

    35 	static CWebCameraVfActive* NewL(MWebCameraVfActiveCallBack* aOwner, RWebcameraDevice& aDriver);

    36 

    37 	CWebCameraVfActive(MWebCameraVfActiveCallBack* aOwner, RWebcameraDevice& aDriver);

    38 

    39 	/**> Destructor */

    40 	~CWebCameraVfActive();

    41 

    42 	/** 

    43 	Starts transfer of view finder data to the given portion of the screen using

    44 	direct screen access.

    45 

    46 	The aScreenRect parameter is in screen co-ordinates and may be modified if,

    47 	eg, the camera requires the destination to have a certain byte alignment, etc.

    48 

    49     @param  aWs 

    50 	        Window server session.

    51 	@param  aScreenDevice 

    52 	        Screen device.

    53 	@param  aWindow 

    54 	        Displayable window.

    55 	@param  aScreenRect 

    56 	        Portion of the screen to which view finder data is to be

    57 	        transferred. This is in screen co-ordinates and may be modified if, for example,

    58 	        the camera requires the destination to have a certain byte alignment.

    59 	*/

    60 	void StartViewFinderDirectL(RWsSession& aWs, CWsScreenDevice& aScreenDevice, RWindowBase& aWindow, TRect& aScreenRect, TRect& aClipRect);

    61 

    62 	/** 

    63 	Stops transfer of view finder data to the screen. 

    64 	*/

    65 	void StopViewFinder();

    66 

    67 	/** 

    68 	Queries whether the view finder is active.

    69 

    70 	@return  ETrue if the view finder is active. EFalse if the view finder is not

    71 	         active. 

    72 	*/

    73 	TBool ViewFinderActive();

    74 

    75 private:

    76 	/** 

    77 	from MAbortDirectScreenAccess

    78 	

    79 	This function is called by the window server when direct screen access must stop

    80 	(for example because a dialogue is moved in front of the area where direct screen access is taking place).

    81 	

    82 	@param  aScreenDevice 

    83 			The reason why direct screen access was terminated. 

    84 	*/

    85 	virtual void AbortNow(RDirectScreenAccess::TTerminationReasons aReason);

    86 

    87 private: 

    88 	/** 

    89 	from 	from MDirectScreenAccess

    90 	

    91 	This function is called by the window server as soon as direct screen access can resume.

    92 	

    93 	@param  aScreenDevice 

    94 			Provides the reason why direct screen access was terminated. 

    95 	*/

    96 	virtual void Restart(RDirectScreenAccess::TTerminationReasons aReason);

    97 

    98 private:

    99 	void ConstructL();

   100 	

   101 	/** 

   102 	Start viewfinder process.

   103 	*/

   104 	void Start();

   105 	

   106 	/** 

   107 	Draw the image of the view finder on screen.

   108 	*/

   109 	void UpdateViewL();

   110 

   111 private:

   112 	void RunL();

   113 	void DoCancel();

   114 

   115 private:

   116 	MWebCameraVfActiveCallBack*		iOwner;				///< origin of start.

   117 	TBool							iViewFinderActive;	///< Status of viewfinder

   118 	RWebcameraDevice				iDriver;			///< Camera driver

   119 

   120 	CFbsBitmap*						iVfBitmap;			///< Bitmap data of viewfinder.

   121 	HBufC8*							iVfBuf;				///< Data buffer of viewfinder.

   122 	TPtr8							iVfBufPtr;			///< Pointer to data buffer of viewfinder.

   123 

   124 	CDirectScreenAccess*			iDSA;				///< DirectScreenAccess object.

   125 	TRect							iScreenRect;		///< The region to draw.

   126 	TRect							iClipRect;			///< The clipping region to draw.

   127 

   128 	TBool							iTestFlug;			///< for test

   129 	};

   130 

   131 

   132 #endif // ECAMWEBCAMERAPLUGIN_H