IlvAlphaBitmapTransition Class Reference

Bitmap transition class. More...

#include <ilviews/bitmaps/transition.h>

Inheritance diagram for IlvAlphaBitmapTransition:

Public Member Functions
	IlvAlphaBitmapTransition ()
	Constructor. More...
virtual void	computeTransitionBitmapData (IlDouble, IlDouble current, const IlvRGBBitmapData &src, const IlvRGBBitmapData &dst, IlvRGBBitmapData &bitmap, IlvRegion &region) const
	Computes a transition image between the specified bitmap data objects. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvBitmapTransition
static void	Draw (IlvPort &dst, const IlvPoint &at, const IlvBitmapData &src, const IlvRegion &region)
	Draws the specified region of the bitmap data object into the specified port. More...

Detailed Description

Bitmap transition class.

Library: display

This class handles bitmap transitions using alpha blending.

See Also

IlvSimpleBitmapTransition, IlvDissolveBitmapTransition

Constructor & Destructor Documentation

IlvAlphaBitmapTransition::IlvAlphaBitmapTransition

(

)

Constructor.

Initializes a new instance of the IlvAlphaBitmapTransition class.

Member Function Documentation

virtual void IlvAlphaBitmapTransition::computeTransitionBitmapData ( IlDouble  oldRate, IlDouble  newRate, const IlvRGBBitmapData &  src, const IlvRGBBitmapData &  dst, IlvRGBBitmapData &  current, IlvRegion &  region  ) const

virtual

Computes a transition image between the specified bitmap data objects.

This method is pure and must be defined in subclasses. It computes a transition image given a source bitmap data object, a destination bitmap data object, and a percentage of completion of the transition. src and dst must have the same size and color depth.
When calling this method, current must contain the transition image corresponding to the oldRate percentage of completion. After returning, current contains the transition image corresponding to the newRate percentage of completion.

Parameters

oldRate	The previous percentage of completion of the transition. Valid values are double values in the interval 0-100.
newRate	The new percentage of completion of the transition. Valid values are double values in the interval 0-100.
src	The source bitmap data.
dst	The destination bitmap data.
current	The current bitmap data.
region	The region of the current bitmap that has changed between the transition from oldRate to newRate.

Implements IlvBitmapTransition.