java.awt.image

Class CropImageFilter

Table des matières
  • All Implemented Interfaces:
    ImageConsumer, Cloneable

    public class CropImageFilter
extends ImageFilter
    An ImageFilter class for cropping images. This class extends the basic ImageFilter Class to extract a given rectangular region of an existing Image and provide a source for a new image containing just the extracted region. It is meant to be used in conjunction with a FilteredImageSource object to produce cropped versions of existing images.
    See Also:
    FilteredImageSource, ImageFilter

    • Constructor Detail

      • CropImageFilter

        public CropImageFilter(int x,
               int y,
               int w,
               int h)
        Constructs a CropImageFilter that extracts the absolute rectangular region of pixels from its source Image as specified by the x, y, w, and h parameters.
        Parameters:
        x - the x location of the top of the rectangle to be extracted
        y - the y location of the top of the rectangle to be extracted
        w - the width of the rectangle to be extracted
        h - the height of the rectangle to be extracted

    • Method Detail

      • setProperties

        public void setProperties(Hashtable<?,?> props)
        Passes along the properties from the source object after adding a property indicating the cropped region. This method invokes super.setProperties, which might result in additional properties being added.

        Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.

        Specified by:
        setProperties in interface ImageConsumer
        Overrides:
        setProperties in class ImageFilter
        Parameters:
        props - the properties from the source object

      • setDimensions

        public void setDimensions(int w,
                 int h)
        Override the source image's dimensions and pass the dimensions of the rectangular cropped region to the ImageConsumer.

        Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.

        Specified by:
        setDimensions in interface ImageConsumer
        Overrides:
        setDimensions in class ImageFilter
        Parameters:
        w - the width of the source image
        h - the height of the source image
        See Also:
        ImageConsumer

      • setPixels

        public void setPixels(int x,
             int y,
             int w,
             int h,
             ColorModel model,
             byte[] pixels,
             int off,
             int scansize)
        Determine whether the delivered byte pixels intersect the region to be extracted and passes through only that subset of pixels that appear in the output region.

        Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.

        Specified by:
        setPixels in interface ImageConsumer
        Overrides:
        setPixels in class ImageFilter
        Parameters:
        x - the X coordinate of the upper-left corner of the area of pixels to be set
        y - the Y coordinate of the upper-left corner of the area of pixels to be set
        w - the width of the area of pixels
        h - the height of the area of pixels
        model - the specified ColorModel
        pixels - the array of pixels
        off - the offset into the pixels array
        scansize - the distance from one row of pixels to the next in the pixels array
        See Also:
        ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)

      • setPixels

        public void setPixels(int x,
             int y,
             int w,
             int h,
             ColorModel model,
             int[] pixels,
             int off,
             int scansize)
        Determine if the delivered int pixels intersect the region to be extracted and pass through only that subset of pixels that appear in the output region.

        Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.

        Specified by:
        setPixels in interface ImageConsumer
        Overrides:
        setPixels in class ImageFilter
        Parameters:
        x - the X coordinate of the upper-left corner of the area of pixels to be set
        y - the Y coordinate of the upper-left corner of the area of pixels to be set
        w - the width of the area of pixels
        h - the height of the area of pixels
        model - the specified ColorModel
        pixels - the array of pixels
        off - the offset into the pixels array
        scansize - the distance from one row of pixels to the next in the pixels array
        See Also:
        ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)

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Document créé le 30/08/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-java/awt/image/cropimagefilter.html

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