image_reader.h

symbian 平台下

/*
 ============================================================================
 Name		: Image_Reader.h
 Author	  : 
 Version	 : 1.0
 Copyright   : Your copyright notice
 Description : CImage_Reader declaration
 ============================================================================
 */

#ifndef IMAGE_READER_H
#define IMAGE_READER_H

#include <e32base.h>	// For CActive, link against: euser.lib
#include <e32std.h>		// For RTimer, link against: euser.lib
#include <coecntrl.h>
#include <cntdef.h>
#include <cntdb.h> 
#include <ImageConversion.h>
#include <BitmapTransforms.h>

class CFbsBitmap;
 
class MImageReadyCallBack
	{
	public:
		virtual void ImageReadyL(const TInt& aError) = 0;
		};
 
class CImage_Reader : public CActive
{
public:
	static CImage_Reader* NewL(const TDesC& aFileName,MImageReadyCallBack& aNotify );
	static CImage_Reader* NewLC(const TDesC& aFileName,MImageReadyCallBack& aNotify );
	~CImage_Reader();
public:
	CFbsBitmap* Bitmap();
protected:
	void DoCancel();
	void RunL();
private:
	CImage_Reader(MImageReadyCallBack& aNotify);
	void ConstructL(const TDesC& aFileName);
	void GetFileType(const TDesC& aFileName, TDes8& aFileType);
private:
	MImageReadyCallBack& iNotify;
	CImageDecoder* iImageDecoder;
	CFbsBitmap* iFrame;
	TFileName iImageName;
	
	CBitmapScaler* iBitmapScaler;
};	

#endif // IMAGE_READER_H