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nsCairoImage.h
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00001 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
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00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Stuart Parmenter <pavlov@pavlov.net>
00024  *   Joe Hewitt <hewitt@netscape.com>
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00026  * Alternatively, the contents of this file may be used under the terms of
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00039 
00040 #ifndef NSCAIROIMAGE__H__
00041 #define NSCAIROIMAGE__H__
00042 
00043 #include "nsIImage.h"
00044 
00045 #include <cairo.h>
00046 
00047 class nsCairoImage : public nsIImage
00048 {
00049 public:
00050     nsCairoImage();
00051     ~nsCairoImage();
00052 
00053     NS_DECL_ISUPPORTS
00054 
00055     virtual nsresult Init(PRInt32 aWidth, PRInt32 aHeight,
00056                           PRInt32 aDepth, nsMaskRequirements aMaskRequirements);
00057     virtual PRInt32 GetBytesPix();
00058     virtual PRBool GetIsRowOrderTopToBottom();
00059     virtual PRInt32 GetWidth();
00060     virtual PRInt32 GetHeight();
00061     virtual PRUint8 * GetBits();
00062     virtual PRInt32 GetLineStride();
00063     virtual PRBool GetHasAlphaMask();
00064     virtual PRUint8 * GetAlphaBits();
00065     virtual PRInt32 GetAlphaLineStride();
00066     virtual PRBool GetIsImageComplete();
00067     virtual void ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRect *aUpdateRect);
00068     virtual nsresult Optimize(nsIDeviceContext* aContext);
00069     virtual nsColorMap * GetColorMap();
00070 
00071     NS_IMETHOD Draw(nsIRenderingContext &aContext,
00072                     nsIDrawingSurface *aSurface,
00073                     PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight);
00074     NS_IMETHOD Draw(nsIRenderingContext &aContext,
00075                     nsIDrawingSurface *aSurface,
00076                     PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
00077                     PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight);
00078     NS_IMETHOD DrawTile(nsIRenderingContext &aContext,
00079                         nsIDrawingSurface *aSurface,
00080                         PRInt32 aSXOffset, PRInt32 aSYOffset,
00081                         PRInt32 aPadX, PRInt32 aPadY,
00082                         const nsRect &aTileRect);
00083     NS_IMETHOD DrawToImage(nsIImage* aDstImage,
00084                            PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight);
00085 
00086     virtual PRInt8 GetAlphaDepth();
00087     virtual void* GetBitInfo();
00088     NS_IMETHOD LockImagePixels(PRBool aMaskPixels);
00089     NS_IMETHOD UnlockImagePixels(PRBool aMaskPixels);
00090 
00091     void UpdateFromImageData();
00092 
00093 protected:
00094     PRInt32 mWidth;
00095     PRInt32 mHeight;
00096     nsRect mDecoded;
00097 
00098     cairo_surface_t *mImageSurface;
00099     cairo_format_t mCairoFormat;
00100     // Where the mImageSurface data lives (in the mCairoFormat)
00101     PRUint32* mImageSurfaceBuf;
00102     // Where gfxIImageFrame data lives while the image data is dirty
00103     // (from LockImagePixels(Alpha) to the next paint)
00104     PRUint8* mImageSurfaceData;
00105     PRUint8* mImageSurfaceAlpha;
00106 
00107     PRUint8 mAlphaDepth;
00108     PRPackedBool mHadAnyData;
00109 };
00110 
00111 #endif // NSCAIROIMAGE__H__