public CropImageFilter(int x,
    int y,
    int w,
    int h) 
{
        cropX = x;
        cropY = y;
        cropW = w;
        cropH = 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

 public  void setDimensions(int w,
    int h) 
{
        consumer.setDimensions(cropW, cropH);
}

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.

 public  void setPixels(int x,
    int y,
    int w,
    int h,
    ColorModel model,
    byte[] pixels,
    int off,
    int scansize) 
{
        int x1 = x;
        if (x1 <  cropX) {
            x1 = cropX;
        }
    int x2 = addWithoutOverflow(x, w);
        if (x2  > cropX + cropW) {
            x2 = cropX + cropW;
        }
        int y1 = y;
        if (y1 <  cropY) {
            y1 = cropY;
        }
    int y2 = addWithoutOverflow(y, h);
        if (y2  > cropY + cropH) {
            y2 = cropY + cropH;
        }
        if (x1  >= x2 || y1  >= y2) {
            return;
        }
        consumer.setPixels(x1 - cropX, y1 - cropY, (x2 - x1), (y2 - y1),
                           model, pixels,
                           off + (y1 - y) * scansize + (x1 - x), 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.

 public  void setPixels(int x,
    int y,
    int w,
    int h,
    ColorModel model,
    int[] pixels,
    int off,
    int scansize) 
{
        int x1 = x;
        if (x1 <  cropX) {
            x1 = cropX;
        }
    int x2 = addWithoutOverflow(x, w);
        if (x2  > cropX + cropW) {
            x2 = cropX + cropW;
        }
        int y1 = y;
        if (y1 <  cropY) {
            y1 = cropY;
        }
    int y2 = addWithoutOverflow(y, h);
        if (y2  > cropY + cropH) {
            y2 = cropY + cropH;
        }
        if (x1  >= x2 || y1  >= y2) {
            return;
        }
        consumer.setPixels(x1 - cropX, y1 - cropY, (x2 - x1), (y2 - y1),
                           model, pixels,
                           off + (y1 - y) * scansize + (x1 - x), 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.

 public  void setProperties(Hashtable props) 
{
        Hashtable< Object,Object > p = (Hashtable< Object,Object >)props.clone();
        p.put("croprect", new Rectangle(cropX, cropY, cropW, cropH));
        super.setProperties(p);
}

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.