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org.apache.batik.svggen

Class SVGAlphaComposite

public class SVGAlphaComposite extends AbstractSVGConverter

Utility class that converts an AlphaComposite object into a set of SVG properties and definitions. Here is how AlphaComposites are mapped to SVG: + AlphaComposite.SRC_OVER with extra alpha is mapped to the opacity attribute + AlphaComposite's other rules are translated into predefined filter effects. One of the big differences between AlphaComposite and the SVG feComposite filter is that feComposite does not have the notion of extra alpha applied to the source. The extra alpha equivalent is obtained by setting the opacity property on the nodes to be composited.

See Also: SVGAlphaComposite

Constructor Summary
SVGAlphaComposite(SVGGeneratorContext generatorContext)
Method Summary
ListgetAlphaCompositeFilterSet()
booleanrequiresBackgroundAccess()
SVGDescriptortoSVG(GraphicContext gc)
Converts part or all of the input GraphicContext into a set of attribute/value pairs and related definitions
SVGCompositeDescriptortoSVG(AlphaComposite composite)

Constructor Detail

SVGAlphaComposite

public SVGAlphaComposite(SVGGeneratorContext generatorContext)

Parameters: generatorContext for use by SVGAlphaComposite to build Elements

Method Detail

getAlphaCompositeFilterSet

public List getAlphaCompositeFilterSet()

Returns: set of all AlphaComposite filter definitions

requiresBackgroundAccess

public boolean requiresBackgroundAccess()

Returns: true if background access is required for any of the converted AlphaComposite rules

toSVG

public SVGDescriptor toSVG(GraphicContext gc)
Converts part or all of the input GraphicContext into a set of attribute/value pairs and related definitions

Parameters: gc GraphicContext to be converted

Returns: descriptor of the attributes required to represent some or all of the GraphicContext state, along with the related definitions

See Also: SVGDescriptor

toSVG

public SVGCompositeDescriptor toSVG(AlphaComposite composite)

Parameters: composite the AlphaComposite object to convert to SVG

Returns: an SVGCompositeDescriptor that defines how to map the input composite in SVG

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