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nsBlender.h
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00001  /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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00011  * Software distributed under the License is distributed on an "AS IS" basis,
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00016  * The Original Code is mozilla.org code.
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00018  * The Initial Developer of the Original Code is
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00020  * Portions created by the Initial Developer are Copyright (C) 1998
00021  * the Initial Developer. All Rights Reserved.
00022  *
00023  * Contributor(s):
00024  *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
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00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either of the GNU General Public License Version 2 or later (the "GPL"),
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00039 
00040 #ifndef nsBlender_h___
00041 #define nsBlender_h___
00042 
00043 #include "nsCOMPtr.h"
00044 #include "nsIBlender.h"
00045 #include "nsIDeviceContext.h"
00046 
00047 typedef enum
00048 {
00049   nsLowQual = 0,
00050   nsLowMedQual,
00051   nsMedQual,
00052   nsHighMedQual,
00053   nsHighQual
00054 } nsBlendQuality;
00055 
00056 //----------------------------------------------------------------------
00057 
00058 // Blender interface
00059 class NS_GFX nsBlender : public nsIBlender
00060 {
00061 public:
00065   nsBlender();
00066 
00067   NS_DECL_ISUPPORTS
00068   
00069   NS_IMETHOD Init(nsIDeviceContext *aContext);
00070   NS_IMETHOD Blend(PRInt32 aSX, PRInt32 aSY, PRInt32 aWidth, PRInt32 aHeight,nsIDrawingSurface* aSrc,
00071                    nsIDrawingSurface* aDest, PRInt32 aDX, PRInt32 aDY, float aSrcOpacity,
00072                    nsIDrawingSurface* aSecondSrc = nsnull, nscolor aSrcBackColor = NS_RGB(0, 0, 0),
00073                    nscolor aSecondSrcBackColor = NS_RGB(0, 0, 0));
00074   NS_IMETHOD Blend(PRInt32 aSX, PRInt32 aSY, PRInt32 aWidth, PRInt32 aHeight, nsIRenderingContext *aSrc,
00075                    nsIRenderingContext *aDest, PRInt32 aDX, PRInt32 aDY, float aSrcOpacity,
00076                    nsIRenderingContext *aSecondSrc = nsnull, nscolor aSrcBackColor = NS_RGB(0, 0, 0),
00077                    nscolor aSecondSrcBackColor = NS_RGB(0, 0, 0));
00078 
00079   NS_IMETHOD GetAlphas(const nsRect& aRect, nsIDrawingSurface* aBlack,
00080                        nsIDrawingSurface* aWhite, PRUint8** aAlphas);
00081 
00082 protected:
00083 
00087   virtual ~nsBlender();
00088 
00089   //called by nsIBlender Blend() functions
00090   nsresult Blend(PRUint8 *aSrcBits, PRInt32 aSrcStride,
00091                  PRUint8 *aDestBits, PRInt32 aDestStride,
00092                  PRUint8 *aSecondSrcBits,
00093                  PRInt32 aSrcBytes, PRInt32 aLines, float aOpacity,
00094                  PRUint8 aDepth);
00095 
00108   void Do32Blend(float aOpacity, PRInt32 aNumLines, PRInt32 aNumBytes,
00109                  PRUint8 *aSImage, PRUint8 *aDImage, PRUint8 *aSecondSImage,
00110                  PRInt32 aSLSpan, PRInt32 aDLSpan, nsBlendQuality aTheQual);
00111 
00124   void Do24Blend(float aOpacity, PRInt32 aNumLines, PRInt32 aNumBytes,
00125                  PRUint8 *aSImage, PRUint8 *aDImage, PRUint8 *aSecondSImage,
00126                  PRInt32 aSLSpan, PRInt32 aDLSpan, nsBlendQuality aBlendQuality);
00127 
00140   void Do16Blend(float aOpacity, PRInt32 aNumLines, PRInt32 aNumBytes,
00141                  PRUint8 *aSImage, PRUint8 *aDImage, PRUint8 *aSecondSImage,
00142                  PRInt32 aSLSpan, PRInt32 aDLSpan, nsBlendQuality aBlendQuality);
00143 };
00144 
00145 #endif /* !nsBlender_h___ */
00146