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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/image/CropImageFilter.html below:

CropImageFilter (Java SE 19 & JDK 19)

All Implemented Interfaces:

ImageConsumer, Cloneable

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

• Field Summary
• Constructor Summary

  Constructors

  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.

• Method Summary

  void

  Override the source image's dimensions and pass the dimensions of the rectangular cropped region to the ImageConsumer.

  void

  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.

  void

  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.

  void

  Passes along the properties from the source object after adding a property indicating the cropped region.

• Constructor Details
  • 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 Details
  • 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)

    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)

    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)

    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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