--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/PNGCodec/PngScanlineEncoder.h	Wed Sep 01 12:38:50 2010 +0100
@@ -0,0 +1,85 @@
+// Copyright (c) 1997-2009 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 __PNGSCANLINEENCODER_H__
+#define __PNGSCANLINEENCODER_H__
+
+#include "PNGCodec.h"
+#include "ImageUtils.h"
+
+const TInt KPngScanlineFilterTypeLength = 1;
+
+// CBitDepth1Encoder
+const TInt KPngDepth1PixelsPerByte = 8;
+const TInt KPngDepth1RoundUpValue = 7;
+const TInt KPngDepth1ShiftValue = 1;
+class CBitDepth1Encoder : public CPngWriteSubCodec
+	{
+private:
+	virtual void DoConstructL();
+	virtual TInt ScanlineBufferSize(TInt aPixelLength);
+	virtual void DoEncode(const CFbsBitmap* aSource, const TInt aScanline,
+					TUint8* aDataPtr, const TUint8* aDataPtrLimit);
+	};
+
+// CBitDepth2Encoder
+const TInt KPngDepth2PixelsPerByte = 4;
+const TInt KPngDepth2RoundUpValue = 3;
+const TInt KPngDepth2ShiftValue = 2;
+class CBitDepth2Encoder : public CPngWriteSubCodec
+	{
+private:
+	virtual void DoConstructL();
+	virtual TInt ScanlineBufferSize(TInt aPixelLength);
+	virtual void DoEncode(const CFbsBitmap* aSource, const TInt aScanline,
+					TUint8* aDataPtr, const TUint8* aDataPtrLimit);
+	};
+
+// CBitDepth4Encoder
+const TInt KPngDepth4PixelsPerByte = 2;
+const TInt KPngDepth4RoundUpValue = 1;
+const TInt KPngDepth4ShiftValue = 4;
+class CBitDepth4Encoder : public CPngWriteSubCodec
+	{
+private:
+	virtual void DoConstructL();
+	virtual TInt ScanlineBufferSize(TInt aPixelLength);
+	virtual void DoEncode(const CFbsBitmap* aSource, const TInt aScanline,
+					TUint8* aDataPtr, const TUint8* aDataPtrLimit);
+	};
+
+// CBitDepth8ColorType2Encoder
+const TInt KPngDepth8RgbBytesPerPixel = 3;
+class CBitDepth8ColorType2Encoder : public CPngWriteSubCodec
+	{
+private:
+	virtual TInt ScanlineBufferSize(TInt aPixelLength);
+	virtual void DoEncode(const CFbsBitmap* aSource, const TInt aScanline,
+					TUint8* aDataPtr, const TUint8* aDataPtrLimit);
+	};
+
+// CBitDepth8Encoder
+const TInt KPngDepth8PixelsPerByte = 1;
+const TInt KPngDepth8ShiftValue = 0;
+class CBitDepth8Encoder : public CPngWriteSubCodec
+	{
+private:
+	virtual void DoConstructL();
+	virtual TInt ScanlineBufferSize(TInt aPixelLength);
+	virtual void DoEncode(const CFbsBitmap* aSource, const TInt aScanline,
+					TUint8* aDataPtr, const TUint8* aDataPtrLimit);
+	};
+
+#endif // __PNGSCANLINEENCODER_H__