openshot-audio  0.1.4
Public Member Functions | List of all members
DropShadowEffect Class Reference

#include <juce_DropShadowEffect.h>

Inheritance diagram for DropShadowEffect:
ImageEffectFilter

Public Member Functions

 DropShadowEffect ()
 
 ~DropShadowEffect ()
 
void setShadowProperties (const DropShadow &newShadow)
 
void applyEffect (Image &sourceImage, Graphics &destContext, float scaleFactor, float alpha)
 
- Public Member Functions inherited from ImageEffectFilter
virtual ~ImageEffectFilter ()
 

Detailed Description

An effect filter that adds a drop-shadow behind the image's content.

(This will only work on images/components that aren't opaque, of course).

When added to a component, this effect will draw a soft-edged shadow based on what gets drawn inside it. The shadow will also be applied to the component's children.

For speed, this doesn't use a proper gaussian blur, but cheats by using a simple bilinear filter. If you need a really high-quality shadow, check out ImageConvolutionKernel::createGaussianBlur()

See also
Component::setComponentEffect

Constructor & Destructor Documentation

◆ DropShadowEffect()

DropShadowEffect::DropShadowEffect ( )

Creates a default drop-shadow effect. To customise the shadow's appearance, use the setShadowProperties() method.

◆ ~DropShadowEffect()

DropShadowEffect::~DropShadowEffect ( )

Destructor.

Member Function Documentation

◆ applyEffect()

void DropShadowEffect::applyEffect ( Image sourceImage,
Graphics destContext,
float  scaleFactor,
float  alpha 
)
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.

Parameters
sourceImagethe 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.
destContextthe graphics context to use to draw the resultant image.
scaleFactora scale factor that has been applied to the image - e.g. if this is 2, then the image is actually scaled-up to twice the original resolution
alphathe alpha with which to draw the resultant image to the target context

Implements ImageEffectFilter.

◆ setShadowProperties()

void DropShadowEffect::setShadowProperties ( const DropShadow newShadow)

Sets up parameters affecting the shadow's appearance.


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