For Rasters, the lookup operates on bands. The number of lookup arrays may be one, in which case the same array is applied to all bands, or it must equal the number of Source Raster bands.
For BufferedImages, the lookup operates on color and alpha components. The number of lookup arrays may be one, in which case the same array is applied to all color (but not alpha) components. Otherwise, the number of lookup arrays may equal the number of Source color components, in which case no lookup of the alpha component (if present) is performed. If neither of these cases apply, the number of lookup arrays must equal the number of Source color components plus alpha components, in which case lookup is performed for all color and alpha components. This allows non-uniform rescaling of multi-band BufferedImages.
BufferedImage sources with premultiplied alpha data are treated in the same manner as non-premultiplied images for purposes of the lookup. That is, the lookup is done per band on the raw data of the BufferedImage source without regard to whether the data is premultiplied. If a color conversion is required to the destination ColorModel, the premultiplied state of both source and destination will be taken into account for this step.
Images with an IndexColorModel cannot be used.
If a RenderingHints object is specified in the constructor, the color rendering hint and the dithering hint may be used when color conversion is required.
This class allows the Source to be the same as the Destination.
public LookupOp(LookupTable lookup, RenderingHints hints)
|Method from java.awt.image.LookupOp Summary:|
|createCompatibleDestImage, createCompatibleDestRaster, filter, filter, getBounds2D, getBounds2D, getPoint2D, getRenderingHints, getTable|
|Methods from java.lang.Object:|
|clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait|
|Method from java.awt.image.LookupOp Detail:|
public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel destCM)
public WritableRaster createCompatibleDestRaster(Raster src)
public final BufferedImage filter(BufferedImage src, BufferedImage dst)
public final WritableRaster filter(Raster src, WritableRaster dst)
public final Rectangle2D getBounds2D(BufferedImage src)
public final Rectangle2D getBounds2D(Raster src)
public final Point2D getPoint2D(Point2D srcPt, Point2D dstPt)
public final RenderingHints getRenderingHints()
public final LookupTable getTable()