public class LookupOp extends Object implements BufferedImageOp, RasterOp
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.
|Constructor and Description|
|Modifier and Type||Method and Description|
Creates a zeroed destination image with the correct size and number of bands.
Creates a zeroed-destination
Performs a lookup operation on a
Performs a lookup operation on a
Returns the bounding box of the filtered destination image.
Returns the bounding box of the filtered destination Raster.
Returns the location of the destination point given a point in the source.
Returns the rendering hints for this op.
public final LookupTable getTable()
public final BufferedImage filter(BufferedImage src, BufferedImage dst)
BufferedImage. If the color model in the source image is not the same as that in the destination image, the pixels will be converted in the destination. If the destination image is
BufferedImagewill be created with an appropriate
IllegalArgumentExceptionmight be thrown if the number of arrays in the
LookupTabledoes not meet the restrictions stated in the class comment above, or if the source image has an
BufferedImageto be filtered
BufferedImagein which to store the results of the filter operation
IllegalArgumentException- if the number of arrays in the
LookupTabledoes not meet the restrictions described in the class comments, or if the source image has an
public final WritableRaster filter(Raster src, WritableRaster dst)
Raster. If the destination
null, a new
Rasterwill be created. The
IllegalArgumentExceptionmight be thrown if the source
Rasterand the destination
Rasterdo not have the same number of bands or if the number of arrays in the
LookupTabledoes not meet the restrictions stated in the class comment above.
src- the source
dst- the destination
WritableRasterfor the filtered
IllegalArgumentException- if the source and destinations rasters do not have the same number of bands, or the number of arrays in the
LookupTabledoes not meet the restrictions described in the class comments.
public final Rectangle2D getBounds2D(BufferedImage src)
public final Rectangle2D getBounds2D(Raster src)
public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel destCM)
null, an appropriate
ColorModelwill be used.
public WritableRaster createCompatibleDestRaster(Raster src)
Rasterwith the correct size and number of bands, given this source.
null, it will be used to hold the return value. Since this is not a geometric operation, the
srcPtwill equal the
Point2Dthat represents a point in the source image
Point2Dthat represents the location in the destination
Point2Din the destination that corresponds to the specified point in the source.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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