Java by API/java.awt.image/PixelGrabber
Содержание
new PixelGrabber(Image img, int x, int y, int w, int h, int[] pix, int off, int scansize)
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.Graphics; import java.awt.Image; import java.awt.MediaTracker; import java.awt.image.ImageObserver; import java.awt.image.MemoryImageSource; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i, j, k, l;
public void init() {
MediaTracker mt = new MediaTracker(this);
i = getImage(getDocumentBase(), "ora-icon.gif");
mt.addImage(i, 0);
try {
mt.waitForAll();
int width = i.getWidth(this);
int height = i.getHeight(this);
int pixels[] = new int[width * height];
PixelGrabber pg = new PixelGrabber(i, 0, 0, width, height, pixels, 0, width);
if (pg.grabPixels() && ((pg.status() & ImageObserver.ALLBITS) != 0)) {
j = createImage(new MemoryImageSource(width, height, rowFlipPixels(pixels, width, height),
0, width));
k = createImage(new MemoryImageSource(width, height, colFlipPixels(pixels, width, height),
0, width));
l = createImage(new MemoryImageSource(height, width, rot90Pixels(pixels, width, height), 0,
height));
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this); // regular
if (j != null)
g.drawImage(j, 150, 10, this); // rowFlip
if (k != null)
g.drawImage(k, 10, 60, this); // colFlip
if (l != null)
g.drawImage(l, 150, 60, this); // rot90
}
private int[] rowFlipPixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int y = height - 1; y >= 0; y--)
for (int x = width - 1; x >= 0; x--)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
private int[] colFlipPixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int y = 0; y < height; y++)
for (int x = width - 1; x >= 0; x--)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
private int[] rot90Pixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int x = width - 1; x >= 0; x--)
for (int y = 0; y < height; y++)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
}
</source>
PixelGrabber: getColorModel()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.AWTEvent; import java.awt.Graphics; import java.awt.Image; import java.awt.event.MouseEvent; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i;
PixelGrabber pg;
public void init() {
i = getImage(getDocumentBase(), "ora-icon.gif");
pg = new PixelGrabber(i, 0, 0, -1, -1, false);
pg.startGrabbing();
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this);
}
protected void processMouseEvent(MouseEvent e) {
if (e.getID() == MouseEvent.MOUSE_CLICKED) {
System.out.println("Status: " + pg.getStatus());
System.out.println("Width: " + pg.getWidth());
System.out.println("Height: " + pg.getHeight());
System.out.println("Pixels: " + (pg.getPixels() instanceof byte[] ? "bytes" : "ints"));
System.out.println("Model: " + pg.getColorModel());
}
super.processMouseEvent(e);
}
}
</source>
PixelGrabber: getHeight()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.AWTEvent; import java.awt.Graphics; import java.awt.Image; import java.awt.event.MouseEvent; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i;
PixelGrabber pg;
public void init() {
i = getImage(getDocumentBase(), "ora-icon.gif");
pg = new PixelGrabber(i, 0, 0, -1, -1, false);
pg.startGrabbing();
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this);
}
protected void processMouseEvent(MouseEvent e) {
if (e.getID() == MouseEvent.MOUSE_CLICKED) {
System.out.println("Status: " + pg.getStatus());
System.out.println("Width: " + pg.getWidth());
System.out.println("Height: " + pg.getHeight());
System.out.println("Pixels: " + (pg.getPixels() instanceof byte[] ? "bytes" : "ints"));
System.out.println("Model: " + pg.getColorModel());
}
super.processMouseEvent(e);
}
}
</source>
PixelGrabber: getPixels()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.AWTEvent; import java.awt.Graphics; import java.awt.Image; import java.awt.event.MouseEvent; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i;
PixelGrabber pg;
public void init() {
i = getImage(getDocumentBase(), "ora-icon.gif");
pg = new PixelGrabber(i, 0, 0, -1, -1, false);
pg.startGrabbing();
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this);
}
protected void processMouseEvent(MouseEvent e) {
if (e.getID() == MouseEvent.MOUSE_CLICKED) {
System.out.println("Status: " + pg.getStatus());
System.out.println("Width: " + pg.getWidth());
System.out.println("Height: " + pg.getHeight());
System.out.println("Pixels: " + (pg.getPixels() instanceof byte[] ? "bytes" : "ints"));
System.out.println("Model: " + pg.getColorModel());
}
super.processMouseEvent(e);
}
}
</source>
PixelGrabber: getStatus()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.AWTEvent; import java.awt.Graphics; import java.awt.Image; import java.awt.event.MouseEvent; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i;
PixelGrabber pg;
public void init() {
i = getImage(getDocumentBase(), "ora-icon.gif");
pg = new PixelGrabber(i, 0, 0, -1, -1, false);
pg.startGrabbing();
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this);
}
protected void processMouseEvent(MouseEvent e) {
if (e.getID() == MouseEvent.MOUSE_CLICKED) {
System.out.println("Status: " + pg.getStatus());
System.out.println("Width: " + pg.getWidth());
System.out.println("Height: " + pg.getHeight());
System.out.println("Pixels: " + (pg.getPixels() instanceof byte[] ? "bytes" : "ints"));
System.out.println("Model: " + pg.getColorModel());
}
super.processMouseEvent(e);
}
}
</source>
PixelGrabber: getWidth()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.AWTEvent; import java.awt.Graphics; import java.awt.Image; import java.awt.event.MouseEvent; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i;
PixelGrabber pg;
public void init() {
i = getImage(getDocumentBase(), "ora-icon.gif");
pg = new PixelGrabber(i, 0, 0, -1, -1, false);
pg.startGrabbing();
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this);
}
protected void processMouseEvent(MouseEvent e) {
if (e.getID() == MouseEvent.MOUSE_CLICKED) {
System.out.println("Status: " + pg.getStatus());
System.out.println("Width: " + pg.getWidth());
System.out.println("Height: " + pg.getHeight());
System.out.println("Pixels: " + (pg.getPixels() instanceof byte[] ? "bytes" : "ints"));
System.out.println("Model: " + pg.getColorModel());
}
super.processMouseEvent(e);
}
}
</source>
PixelGrabber: grabPixels()
<source lang="java">
// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.applet.Applet; import java.awt.Graphics; import java.awt.Image; import java.awt.MediaTracker; import java.awt.image.ImageObserver; import java.awt.image.MemoryImageSource; import java.awt.image.PixelGrabber; public class MainClass extends Applet {
Image i, j, k, l;
public void init() {
MediaTracker mt = new MediaTracker(this);
i = getImage(getDocumentBase(), "ora-icon.gif");
mt.addImage(i, 0);
try {
mt.waitForAll();
int width = i.getWidth(this);
int height = i.getHeight(this);
int pixels[] = new int[width * height];
PixelGrabber pg = new PixelGrabber(i, 0, 0, width, height, pixels, 0, width);
if (pg.grabPixels() && ((pg.status() & ImageObserver.ALLBITS) != 0)) {
j = createImage(new MemoryImageSource(width, height, rowFlipPixels(pixels, width, height),
0, width));
k = createImage(new MemoryImageSource(width, height, colFlipPixels(pixels, width, height),
0, width));
l = createImage(new MemoryImageSource(height, width, rot90Pixels(pixels, width, height), 0,
height));
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void paint(Graphics g) {
g.drawImage(i, 10, 10, this); // regular
if (j != null)
g.drawImage(j, 150, 10, this); // rowFlip
if (k != null)
g.drawImage(k, 10, 60, this); // colFlip
if (l != null)
g.drawImage(l, 150, 60, this); // rot90
}
private int[] rowFlipPixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int y = height - 1; y >= 0; y--)
for (int x = width - 1; x >= 0; x--)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
private int[] colFlipPixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int y = 0; y < height; y++)
for (int x = width - 1; x >= 0; x--)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
private int[] rot90Pixels(int pixels[], int width, int height) {
int newPixels[] = null;
if ((width * height) == pixels.length) {
newPixels = new int[width * height];
int newIndex = 0;
for (int x = width - 1; x >= 0; x--)
for (int y = 0; y < height; y++)
newPixels[newIndex++] = pixels[y * width + x];
}
return newPixels;
}
}
</source>
