SkPixelXorXfermode Class Reference

#include <SkPixelXorXfermode.h>

Inherits SkXfermode.

Collaboration diagram for SkPixelXorXfermode:
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List of all members.

Public Member Functions

 SkPixelXorXfermode (SkColor opColor)
virtual Factory getFactory ()
virtual void flatten (SkFlattenableWriteBuffer &)

Protected Member Functions

virtual SkPMColor xferColor (SkPMColor src, SkPMColor dst)

Detailed Description

SkPixelXorXfermode implements a simple pixel xor (op ^ src ^ dst). This transformation does not follow premultiplied conventions, therefore this proc *always* returns an opaque color (alpha == 255). Thus it is not really usefull for operating on blended colors.

Definition at line 27 of file SkPixelXorXfermode.h.


Constructor & Destructor Documentation

SkPixelXorXfermode::SkPixelXorXfermode ( SkColor  opColor  )  [inline]

Definition at line 29 of file SkPixelXorXfermode.h.


Member Function Documentation

virtual void SkPixelXorXfermode::flatten ( SkFlattenableWriteBuffer  )  [virtual]

Override this to write data specific to your subclass into the buffer, being sure to call your super-class' version first. This data will later be passed to your Factory function, returned by getFactory().

Reimplemented from SkFlattenable.

virtual Factory SkPixelXorXfermode::getFactory (  )  [virtual]

Implement this to return a factory function pointer that can be called to recreate your class given a buffer (previously written to by your override of flatten().

Implements SkFlattenable.

virtual SkPMColor SkPixelXorXfermode::xferColor ( SkPMColor  src,
SkPMColor  dst 
) [protected, virtual]

The default implementation of xfer32/xfer16/xferA8 in turn call this method, 1 color at a time (upscaled to a SkPMColor). The default implmentation of this method just returns dst. If performance is important, your subclass should override xfer32/xfer16/xferA8 directly.

This method will not be called directly by the client, so it need not be implemented if your subclass has overridden xfer32/xfer16/xferA8

Reimplemented from SkXfermode.


The documentation for this class was generated from the following file:

Generated on Tue Oct 20 11:03:42 2009 for Skia by  doxygen 1.6.1