public interface RenderedImageFactory
RenderedImage create(ParameterBlock paramBlock, RenderingHints hints)
The create() method can return null if the RenderedImageFactory is not capable of producing output for the given set of source images and parameters. For example, if a RenderedImageFactory is only capable of performing a 3x3 convolution on single-banded image data, and the source image has multiple bands or the convolution Kernel is 5x5, null should be returned.
Hints should be taken into account, but can be ignored. The created RenderedImage may have a property identified by the String HINTS_OBSERVED to indicate which RenderingHints were used to create the image. In addition any RenderedImages that are obtained via the getSources() method on the created RenderedImage may have such a property.
paramBlock- a ParameterBlock containing sources and parameters for the RenderedImage to be created.
hints- a RenderingHints object containing hints.
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