Java java.awt.image Class ReplicateScaleFilter（JDK8）

Field Detail

• srcWidth

  protected int srcWidth

  The width of the source image.

• srcHeight

  protected int srcHeight

  The height of the source image.

• destWidth

  protected int destWidth

  The target width to scale the image.

• destHeight

  protected int destHeight

  The target height to scale the image.

• srcrows

  protected int[] srcrows

  An int array containing information about a row of pixels.

• srccols

  protected int[] srccols

  An int array containing information about a column of pixels.

• outpixbuf

  protected Object outpixbuf

  A byte array initialized with a size of destWidth and used to deliver a row of pixel data to the ImageConsumer.

Constructor Detail

• ReplicateScaleFilter

  public ReplicateScaleFilter(int width,
                              int height)

  Constructs a ReplicateScaleFilter that scales the pixels from its source Image as specified by the width and height parameters.

  Parameters:

  width - the target width to scale the image

  height - the target height to scale the image

  Throws:

  IllegalArgumentException - if width equals zero or height equals zero

Method Detail

• setProperties

  public void setProperties(Hashtable<?,?> props)

  Passes along the properties from the source object after adding a property indicating the scale applied. 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 dimensions of the source image and pass the dimensions of the new scaled size 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)

  Choose which rows and columns of the delivered byte pixels are needed for the destination scaled image and pass through just those rows and columns that are needed, replicated as necessary.

  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)

  Choose which rows and columns of the delivered int pixels are needed for the destination scaled image and pass through just those rows and columns that are needed, replicated as necessary.

  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)