A graphical effect filter that can be applied to components. More...
Inherited by DropShadowEffect, and GlowEffect.
Public Member Functions | |
| virtual void | applyEffect (Image &sourceImage, Graphics &destContext, float alpha)=0 |
| Overridden to render the effect. | |
| virtual | ~ImageEffectFilter () |
| Destructor. | |
A graphical effect filter that can be applied to components.
An ImageEffectFilter can be applied to the image that a component paints before it hits the screen.
This is used for adding effects like shadows, blurs, etc.
| virtual ImageEffectFilter::~ImageEffectFilter | ( | ) | [virtual] |
Destructor.
| virtual void ImageEffectFilter::applyEffect | ( | Image & | sourceImage, |
| Graphics & | destContext, | ||
| float | alpha | ||
| ) | [pure virtual] |
Overridden to render the effect.
The implementation of this method must use the image that is passed in as its source, and should render its output to the graphics context passed in.
| sourceImage | the image that the source component has just rendered with its paint() method. The image may or may not have an alpha channel, depending on whether the component is opaque. |
| destContext | the graphics context to use to draw the resultant image. |
| alpha | the alpha with which to draw the resultant image to the target context |
Implemented in DropShadowEffect, and GlowEffect.
