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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 * with the License.  You may obtain a copy of the License at
 * 
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#ifndef _SV_SALBMP_H
#define _SV_SALBMP_H

#include <tools/gen.hxx>
#include <win/wincomp.hxx>
#include <salbmp.hxx>
#include <boost/shared_ptr.hpp>

// --------------
// - SalBitmap	-
// --------------

struct	BitmapBuffer;
class	BitmapColor;
class	BitmapPalette;
class	SalGraphics;
namespace Gdiplus { class Bitmap; }
typedef boost::shared_ptr< Gdiplus::Bitmap > GdiPlusBmpPtr;

class WinSalBitmap : public SalBitmap
{
private:
    friend class GdiPlusBuffer; // allow buffer to remove maGdiPlusBitmap and mpAssociatedAlpha eventually

	Size				maSize;
	HGLOBAL 			mhDIB;
	HBITMAP 			mhDDB;

    // the buffered evtl. used Gdiplus::Bitmap instance. It is managed by
    // GdiPlusBuffer. To make this safe, it is only handed out as shared
    // pointer; the GdiPlusBuffer may delete the local instance.
    //
    // mpAssociatedAlpha holds the last WinSalBitmap used to construct an
    // evtl. buffered GdiPlusBmp. This is needed since the GdiPlusBmp is a single
    // instance and remembered only on the content-WinSalBitmap, not on the
    // alpha-WinSalBitmap.
    GdiPlusBmpPtr       maGdiPlusBitmap;
    const WinSalBitmap* mpAssociatedAlpha;

    sal_uInt16			mnBitCount;

    Gdiplus::Bitmap* ImplCreateGdiPlusBitmap(const WinSalBitmap& rAlphaSource);
    Gdiplus::Bitmap* ImplCreateGdiPlusBitmap();

public:

	HGLOBAL 			ImplGethDIB() const { return mhDIB; }
	HBITMAP 			ImplGethDDB() const { return mhDDB; }
    
    GdiPlusBmpPtr ImplGetGdiPlusBitmap(const WinSalBitmap* pAlphaSource = 0) const;

	static HGLOBAL		ImplCreateDIB( const Size& rSize, sal_uInt16 nBitCount, const BitmapPalette& rPal );
	static HANDLE		ImplCopyDIBOrDDB( HANDLE hHdl, bool bDIB );
	static sal_uInt16	ImplGetDIBColorCount( HGLOBAL hDIB );
	static void 		ImplDecodeRLEBuffer( const BYTE* pSrcBuf, BYTE* pDstBuf,
											 const Size& rSizePixel, bool bRLE4 );

public:

						WinSalBitmap();
	virtual				~WinSalBitmap();

public:

	bool                        Create( HANDLE hBitmap, bool bDIB, bool bCopyHandle );
	virtual bool                Create( const Size& rSize, sal_uInt16 nBitCount, const BitmapPalette& rPal );
	virtual bool                Create( const SalBitmap& rSalBmpImpl );
	virtual bool                Create( const SalBitmap& rSalBmpImpl, SalGraphics* pGraphics );
	virtual bool                Create( const SalBitmap& rSalBmpImpl, sal_uInt16 nNewBitCount );

	virtual void                Destroy();

	virtual Size                GetSize() const { return maSize; }
	virtual sal_uInt16              GetBitCount() const { return mnBitCount; }

	virtual BitmapBuffer*		AcquireBuffer( bool bReadOnly );
	virtual void                ReleaseBuffer( BitmapBuffer* pBuffer, bool bReadOnly );
    virtual bool                GetSystemData( BitmapSystemData& rData );
};

#endif // _SV_SALBMP_HXX