| Methods Summary |
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| public java.awt.image.RenderedImage | create(java.awt.image.renderable.RenderContext renderContext, java.awt.image.renderable.ParameterBlock paramBlock)Creates a rendering, given a RenderContext and a ParameterBlock
containing the operation's sources and parameters. The output
is a RenderedImage that takes the RenderContext into account to
determine its dimensions and placement on the image plane.
This method houses the "intelligence" that allows a
rendering-independent operation to adapt to a specific
RenderContext.
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| public java.awt.geom.Rectangle2D | getBounds2D(java.awt.image.renderable.ParameterBlock paramBlock)Returns the bounding box for the output of the operation,
performed on a given set of sources, in rendering-independent
space. The bounds are returned as a Rectangle2D, that is, an
axis-aligned rectangle with floating-point corner coordinates.
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| public java.lang.Object | getProperty(java.awt.image.renderable.ParameterBlock paramBlock, java.lang.String name)Gets the appropriate instance of the property specified by the name
parameter. This method must determine which instance of a property to
return when there are multiple sources that each specify the property.
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| public java.lang.String[] | getPropertyNames()Returns a list of names recognized by getProperty.
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| public boolean | isDynamic()Returns true if successive renderings (that is, calls to
create(RenderContext, ParameterBlock)) with the same arguments
may produce different results. This method may be used to
determine whether an existing rendering may be cached and
reused. It is always safe to return true.
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| public java.awt.image.renderable.RenderContext | mapRenderContext(int i, java.awt.image.renderable.RenderContext renderContext, java.awt.image.renderable.ParameterBlock paramBlock, java.awt.image.renderable.RenderableImage image)Maps the operation's output RenderContext into a RenderContext
for each of the operation's sources. This is useful for
operations that can be expressed in whole or in part simply as
alterations in the RenderContext, such as an affine mapping, or
operations that wish to obtain lower quality renderings of
their sources in order to save processing effort or
transmission bandwith. Some operations, such as blur, can also
use this mechanism to avoid obtaining sources of higher quality
than necessary.
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