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Class java.awt.image.ColorConvertOp

java.lang.Object
    |
    +----java.awt.image.ColorConvertOp

public class ColorConvertOp
extends Object
implements BufferedImageOp, RasterOp
This class performs a pixel-by-pixel color conversion of the data in the source image. The resulting color values are scaled to the precision of the destination image data type. Color conversion can be specified via an array of ColorSpace objects or an array of ICC_Profile objects.

If the source is a BufferedImage with premultiplied alpha, the color components are divided by the alpha component before color conversion. If the destination is a BufferedImage with premultiplied alpha, the color components are multiplied by the alpha component after conversion. Rasters are treated as having no alpha channel, i.e. all channels are color channels.

Note Source and Destination may be the same object.


Constructor Summary
 ColorConvertOp()
Constructs a new ColorConvertOp which will convert from a source color space to a destination color space.
 ColorConvertOp(int colorspace)
Constructs a new ColorConvertOp from a color space identified by an integer constant representing one of the specific predefined color spaces from the ColorSpace class.
 ColorConvertOp(ColorSpace cspace)
Constructs a new ColorConvertOp from a ColorSpace object.
 ColorConvertOp(int srcColorspace, int dstColorspace)
Constructs a new ColorConvertOp from two color spaces identified by integer constants representing specific predefined color spaces from the ColorSpace class.
 ColorConvertOp(ColorSpace srcCspace, ColorSpace dstCspace)
Constructs a new ColorConvertOp from two ColorSpace objects.
 ColorConvertOp(ICC_Profile[] profiles)
Constructs a new ColorConvertOp from an array of ICC_Profiles.
 

Method Summary
BufferedImage  createCompatibleDestImage(BufferedImage src, ColorModel destCM)
Creates an empty destination image with the correct size and number of components, given this source.
WritableRaster  createCompatibleDestRaster(Raster src)
Creates an empty destination Raster with the correct size and number of bands, given this source.
BufferedImage  filter(BufferedImage src, BufferedImage dest)
ColorConvert the BufferedImage.
WritableRaster  filter(Raster src, WritableRaster dest)
ColorConvert the image data in the source Raster.
Rectangle2D  getDestBounds(BufferedImage src)
Returns the bounding box of the destination, given this source.
Rectangle2D  getDestBounds(Raster src)
Returns the bounding box of the destination, given this source.
Point2D  getDestPoint(Point2D srcPt, Point2D dstPt)
Returns the location of the destination point given a point in the source image.
ICC_Profile[]  getICC_Profiles()
Returns the array of ICC_Profiles used to construct this ColorConvertOp.
 
Methods inherited from class java.lang.Object
 clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ColorConvertOp

public ColorConvertOp()
Constructs a new ColorConvertOp which will convert from a source color space to a destination color space. This Op can be used only with BufferedImages, and will convert directly from the ColorSpace of the source image to that of the destination. The destination cannot be specified as null.

ColorConvertOp

public ColorConvertOp(int colorspace)
Constructs a new ColorConvertOp from a color space identified by an integer constant representing one of the specific predefined color spaces from the ColorSpace class. This Op can be used only with BufferedImages, and is primarily useful when the filter method is invoked with a destination argument of null. In that case, the color space defines the destination color space for the destination created by the filter method. Otherwise, the color space defines an intermediate space to which the source is converted before being converted to the destination space.

ColorConvertOp

public ColorConvertOp(ColorSpace cspace)
Constructs a new ColorConvertOp from a ColorSpace object. This Op can be used only with BufferedImages, and is primarily useful when the filter method is invoked with a destination argument of null. In that case, the ColorSpace defines the destination color space for the destination created by the filter method. Otherwise, the ColorSpace defines an intermediate space to which the source is converted before being converted to the destination space.

ColorConvertOp

public ColorConvertOp(int srcColorspace,
                      int dstColorspace)
Constructs a new ColorConvertOp from two color spaces identified by integer constants representing specific predefined color spaces from the ColorSpace class. This Op is primarily useful for calling the filter method on Rasters, in which case the two color spaces define the operation to be performed on the Rasters. In that case, the number of bands in the source Raster must match the number of components in srcColorspace, and the number of bands in the destination Raster must match the number of components in dstColorspace. For BufferedImages, the two color spaces define intermediate spaces through which the source is converted before being converted to the destination space.

ColorConvertOp

public ColorConvertOp(ColorSpace srcCspace,
                      ColorSpace dstCspace)
Constructs a new ColorConvertOp from two ColorSpace objects. This Op is primarily useful for calling the filter method on Rasters, in which case the two ColorSpaces define the operation to be performed on the Rasters. In that case, the number of bands in the source Raster must match the number of components in srcCspace, and the number of bands in the destination Raster must match the number of components in dstCspace. For BufferedImages, the two ColorSpaces define intermediate spaces through which the source is converted before being converted to the destination space.

ColorConvertOp

public ColorConvertOp(ICC_Profile[] profiles)
Constructs a new ColorConvertOp from an array of ICC_Profiles. The sequence of profiles may include profiles that represent color spaces, profiles that represent effects, etc. If the whole sequence does not represent a well-defined color conversion, an exception is thrown.

For BufferedImages, if the ColorSpace of the source BufferedImage does not match the requirements of the first profile in the array, the first conversion is to an appropriate ColorSpace. If the requirements of the last profile in the array are not met by the ColorSpace of the destination BufferedImage, the last conversion is to the destination's ColorSpace.

For Rasters, the number of bands in the source Raster must match the requirements of the first profile in the array, and the number of bands in the destination Raster must match the requirements of the last profile in the array. The array must have at least two elements or calling the filter method for Rasters will throw an IllegalArgumentException.

Throws:
IllegalArgumentException - when the profile sequence does not specify a well-defined color conversion
Method Detail

getICC_Profiles

public ICC_Profile[] getICC_Profiles()
Returns the array of ICC_Profiles used to construct this ColorConvertOp. Returns null if the ColorConvertOp was constructed from an array of ColorSpaces.

filter

public BufferedImage filter(BufferedImage src,
                            BufferedImage dest)
ColorConvert the BufferedImage. If the destination image is null, a BufferedImage will be created with an appropriate ColorModel.
Implements:
filter in interface BufferedImageOp

filter

public WritableRaster filter(Raster src,
                             WritableRaster dest)
ColorConvert the image data in the source Raster. If the destination Raster is null, a new Raster will be created. The number of bands in the source and destination Rasters must meet the requirements explained above. The constructor used to create this ColorConvertOp must have provided enough information to define both source and destination color spaces. See above. Otherwise, an exception is thrown.
Implements:
filter in interface BufferedImageOp
Throws:
IllegalArgumentException - if the number of source or destination bands is incorrect or the source or destination color spaces are undefined

getDestBounds

public Rectangle2D getDestBounds(BufferedImage src)
Returns the bounding box of the destination, given this source. Note that this will be the same as the the bounding box of the source.
Implements:
getDestBounds in interface BufferedImageOp

getDestBounds

public Rectangle2D getDestBounds(Raster src)
Returns the bounding box of the destination, given this source. Note that this will be the same as the the bounding box of the source.
Implements:
getDestBounds in interface BufferedImageOp

createCompatibleDestImage

public BufferedImage createCompatibleDestImage(BufferedImage src,
                                               ColorModel destCM)
Creates an empty destination image with the correct size and number of components, given this source.
Implements:
createCompatibleDestImage in interface BufferedImageOp
Parameters:
src - Source image for the filter operation
destCM - ColorModel of the destination. If null, an appropriate ColorModel will be used.

createCompatibleDestRaster

public WritableRaster createCompatibleDestRaster(Raster src)
Creates an empty destination Raster with the correct size and number of bands, given this source.
Implements:
createCompatibleDestRaster in interface RasterOp

getDestPoint

public Point2D getDestPoint(Point2D srcPt,
                            Point2D dstPt)
Returns the location of the destination point given a point in the source image. If dstPt is non-null, it will be used to hold the return value.
Implements:
getDestPoint in interface BufferedImageOp

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