jdk.awt.image.LookupOp — clojure-interop/java.awt 1.0.5

This class implements a lookup operation from the source to the destination. The LookupTable object may contain a single array or multiple arrays, subject to the restrictions below.

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.

->lookup-op clj

(->lookup-op lookup hints)

Constructor.

Constructs a LookupOp object given the lookup table and a RenderingHints object, which might be null.

lookup - the specified LookupTable - java.awt.image.LookupTable hints - the specified RenderingHints, or null - java.awt.RenderingHints

create-compatible-dest-image clj

(create-compatible-dest-image this src dest-cm)

Creates a zeroed destination image with the correct size and number of bands. If destCM is null, an appropriate ColorModel will be used.

src - Source image for the filter operation. - java.awt.image.BufferedImage dest-cm - the destination's ColorModel, which can be null. - java.awt.image.ColorModel

returns: a filtered destination BufferedImage. - java.awt.image.BufferedImage

create-compatible-dest-raster clj

(create-compatible-dest-raster this src)

Creates a zeroed-destination Raster with the correct size and number of bands, given this source.

src - the Raster to be transformed - java.awt.image.Raster

returns: the zeroed-destination Raster. - java.awt.image.WritableRaster

filter clj

(filter this src dst)

Performs a lookup operation on a 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 null, a BufferedImage will be created with an appropriate ColorModel. An IllegalArgumentException might be thrown if the number of arrays in the LookupTable does not meet the restrictions stated in the class comment above, or if the source image has an IndexColorModel.

src - the BufferedImage to be filtered - java.awt.image.BufferedImage dst - the BufferedImage in which to store the results of the filter operation - java.awt.image.BufferedImage

returns: the filtered BufferedImage. - java.awt.image.BufferedImage

throws: java.lang.IllegalArgumentException - if the number of arrays in the LookupTable does not meet the restrictions described in the class comments, or if the source image has an IndexColorModel.

get-bounds-2-d clj

(get-bounds-2-d this src)

Returns the bounding box of the filtered destination image. Since this is not a geometric operation, the bounding box does not change.

src - the BufferedImage to be filtered - java.awt.image.BufferedImage

returns: the bounds of the filtered definition image. - java.awt.geom.Rectangle2D

get-point-2-d clj

(get-point-2-d this src-pt dst-pt)

Returns the location of the destination point given a point in the source. If dstPt is not null, it will be used to hold the return value. Since this is not a geometric operation, the srcPt will equal the dstPt.

src-pt - a Point2D that represents a point in the source image - java.awt.geom.Point2D dst-pt - a Point2Dthat represents the location in the destination - java.awt.geom.Point2D

returns: the Point2D in the destination that corresponds to the specified point in the source. - java.awt.geom.Point2D

get-rendering-hints clj

(get-rendering-hints this)

Returns the rendering hints for this op.

returns: the RenderingHints object associated with this op. - java.awt.RenderingHints

get-table clj

(get-table this)

Returns the LookupTable.

returns: the LookupTable of this LookupOp. - java.awt.image.LookupTable