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Class java.awt.image.PixelGrabber

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

public class PixelGrabber

extends Object

implements ImageConsumer

public abstract void handlesinglepixel(int x, int y, int pixel);
public void handlepixels(Image img, int x, int y, int w, int h) {
	int[] pixels = new int[w * h];
	PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
	try {
	    pg.grabPixels();
	} catch (InterruptedException e) {
	    System.err.println("interrupted waiting for pixels!");
	    return;
	}
	if ((pg.status() & ImageObserver.ABORT) != 0) {
	    System.err.println("image fetch aborted or errored");
	    return;
	}
	for (int j = 0; j < h; j++) {
	    for (int i = 0; i < w; i++) {
		handlesinglepixel(x+i, y+j, pixels[j * w + i]);
	    }
	}
}

PixelGrabber(Image, int, int, int, int, int[], int, int)

Create a PixelGrabber object to grab the (x, y, w, h) rectangular section of pixels from the specified image into the given array.

PixelGrabber(ImageProducer, int, int, int, int, int[], int, int)

Create a PixelGrabber object to grab the (x, y, w, h) rectangular section of pixels from the image produced by the specified ImageProducer into the given array.

grabPixels()

Request the Image or ImageProducer to start delivering pixels and wait for all of the pixels in the rectangle of interest to be delivered.

grabPixels(long)

Request the Image or ImageProducer to start delivering pixels and wait for all of the pixels in the rectangle of interest to be delivered or until the specified timeout has elapsed.

imageComplete(int)

The imageComplete method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setColorModel(ColorModel)

The setColorModel method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setDimensions(int, int)

The setDimensions method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setHints(int)

The setHints method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setPixels(int, int, int, int, ColorModel, byte[], int, int)

The setPixels method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setPixels(int, int, int, int, ColorModel, int[], int, int)

The setPixels method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

setProperties(Hashtable)

The setProperties method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

status()

Return the status of the pixels.

  public PixelGrabber(Image img,
                      int x,
                      int y,
                      int w,
                      int h,
                      int pix[],
                      int off,
                      int scansize)

Create a PixelGrabber object to grab the (x, y, w, h) rectangular section of pixels from the specified image into the given array. The pixels are stored into the array in the default RGB ColorModel. The RGB data for pixel (i, j) where (i, j) is inside the rectangle (x, y, w, h) is stored in the array at pix[(j - y) * scansize + (i - x) + off].

Parameters:

img - the image to retrieve pixels from

x - the x coordinate of the upper left corner of the rectangle of pixels to retrieve from the image, relative to the default (unscaled) size of the image

y - the y coordinate of the upper left corner of the rectangle of pixels to retrieve from the image

w - the width of the rectangle of pixels to retrieve

h - the height of the rectangle of pixels to retrieve

pix - the array of integers which are to be used to hold the RGB pixels retrieved from the image

off - the offset into the array of where to store the first pixel

scansize - the distance from one row of pixels to the next in the array

See Also:

getRGBdefault

  public PixelGrabber(ImageProducer ip,
                      int x,
                      int y,
                      int w,
                      int h,
                      int pix[],
                      int off,
                      int scansize)

Create a PixelGrabber object to grab the (x, y, w, h) rectangular section of pixels from the image produced by the specified ImageProducer into the given array. The pixels are stored into the array in the default RGB ColorModel. The RGB data for pixel (i, j) where (i, j) is inside the rectangle (x, y, w, h) is stored in the array at pix[(j - y) * scansize + (i - x) + off].

Parameters:

img - the image to retrieve pixels from

x - the x coordinate of the upper left corner of the rectangle of pixels to retrieve from the image, relative to the default (unscaled) size of the image

y - the y coordinate of the upper left corner of the rectangle of pixels to retrieve from the image

w - the width of the rectangle of pixels to retrieve

h - the height of the rectangle of pixels to retrieve

pix - the array of integers which are to be used to hold the RGB pixels retrieved from the image

off - the offset into the array of where to store the first pixel

scansize - the distance from one row of pixels to the next in the array

See Also:

getRGBdefault

  public boolean grabPixels() throws InterruptedException

Request the Image or ImageProducer to start delivering pixels and wait for all of the pixels in the rectangle of interest to be delivered.

Returns:

true if the pixels were successfully grabbed, false on abort, error or timeout

Throws: InterruptedException

Another thread has interrupted this thread.

  public synchronized boolean grabPixels(long ms) throws InterruptedException

Request the Image or ImageProducer to start delivering pixels and wait for all of the pixels in the rectangle of interest to be delivered or until the specified timeout has elapsed.

Parameters:

ms - the number of milliseconds to wait for the image pixels to arrive before timing out

Returns:

true if the pixels were successfully grabbed, false on abort, error or timeout

Throws: InterruptedException

Another thread has interrupted this thread.

  public synchronized int status()

Return the status of the pixels. The ImageObserver flags representing the available pixel information are returned.

Returns:

the bitwise OR of all relevant ImageObserver flags

See Also:

ImageObserver

  public void setDimensions(int width,
                            int height)

The setDimensions method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public void setHints(int hints)

The setHints method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public void setProperties(Hashtable props)

The setProperties method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public void setColorModel(ColorModel model)

The setColorModel method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public void setPixels(int srcX,
                        int srcY,
                        int srcW,
                        int srcH,
                        ColorModel model,
                        byte pixels[],
                        int srcOff,
                        int srcScan)

The setPixels method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public void setPixels(int srcX,
                        int srcY,
                        int srcW,
                        int srcH,
                        ColorModel model,
                        int pixels[],
                        int srcOff,
                        int srcScan)

The setPixels method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

  public synchronized void imageComplete(int status)

The imageComplete method is part of the ImageConsumer API which this class must implement to retrieve the pixels.

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