All operations that are to be used in a rendering-independent chain must implement ContextualRenderedImageFactory.
Classes that implement this interface must provide a constructor with no arguments.
| Modifier and Type | Method and Description |
|---|---|
| public RenderedImage | Returns: aRenderedImage from the sources and parameters
in the specified ParameterBlock and according to the
rendering instructions in the specified RenderContext.The RenderContext specifying the rendering renderContext, ParameterBlock a ParameterBlock containing the operation's
sources and parameters paramBlock)Creates a rendering, given a RenderContext and a ParameterBlock containing the operation's sources and parameters. |
| public Rectangle2D | Returns: a Rectangle2D specifying the rendering-independent bounding box of the output.a ParameterBlock containing the operation's
sources and parameters. paramBlock)Returns the bounding box for the output of the operation, performed on a given set of sources, in rendering-independent space. |
| public Object | Returns: an object reference to the value of the property requested.a ParameterBlock containing the operation's
sources and parameters. paramBlock, String a String naming the desired property. name)Gets the appropriate instance of the property specified by the name parameter. |
| public String[] | Returns: the list of property names.Returns a list of names recognized by getProperty. |
| public boolean | Returns: true if successive renderings with the
same arguments might produce different results;
false otherwise.Returns true if successive renderings (that is, calls to create(RenderContext, ParameterBlock)) with the same arguments may produce different results. |
| public RenderContext | Returns: aRenderContext for
the source at the specified index of the parameters
Vector contained in the specified ParameterBlock.the index of the source image. i, RenderContext the RenderContext being applied to the operation. renderContext, ParameterBlock a ParameterBlock containing the operation's
sources and parameters. paramBlock, RenderableImage the RenderableImage being rendered. image)Maps the operation's output RenderContext into a RenderContext for each of the operation's sources. |
| create | back to summary |
|---|---|
| public RenderedImage create(RenderContext renderContext, 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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| getBounds2D | back to summary |
|---|---|
| public Rectangle2D getBounds2D(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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| getProperty | back to summary |
|---|---|
| public Object getProperty(ParameterBlock paramBlock, 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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| getPropertyNames | back to summary |
|---|---|
| public String[] getPropertyNames() Returns a list of names recognized by getProperty.
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| isDynamic | back to summary |
|---|---|
| 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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| mapRenderContext | back to summary |
|---|---|
| public RenderContext mapRenderContext(int i, RenderContext renderContext, ParameterBlock paramBlock, 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 bandwidth. Some operations, such as blur, can also use this mechanism to avoid obtaining sources of higher quality than necessary.
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