void crossfade() {
int[] pixA = startView.getPixels();
int[] pixM = morphView.getPixels();
int[] pixB = endView.getPixels();
int width = morphView.getImgWidth();
int height = morphView.getImgHeight();
double a = morphPos;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int posM = y * width + x;
int argb = pixA[posM];
int rA = (argb >> 16) & 0xff;
int gA = (argb >> 8) & 0xff;
int bA = (argb) & 0xff;
argb = pixB[posM];
int rB = (argb >> 16) & 0xff;
int gB = (argb >> 8) & 0xff;
int bB = (argb) & 0xff;
int rM = (int) ((1 - a) * rA + a * rB);
int gM = (int) ((1 - a) * gA + a * gB);
int bM = (int) ((1 - a) * bA + a * bB);
pixM[posM] = 0xFF000000 | (rM << 16) | (gM << 8) | bM;
}
}
}
private synchronized void calculate() {
long startTime = System.currentTimeMillis();
switch (method.getSelectedIndex()) {
case 0:
crossfade();
break;
case 1:
scaleLeft();
break;
// TODO: add the other methods here
default:
Arrays.fill(morphView.getPixels(), 0xffffffff); // white image
break;
}
morphView.applyChanges();
long time = System.currentTimeMillis() - startTime;
statusLine.setText("Processing time: " + time + " ms");
}
void scaleLeft() {
// This implements a simple nearest neighbor scaling.
// You may replace it by a bilinear scaling for better visual results
int[] pixA = startView.getPixels();
int[] pixM = morphView.getPixels();
int width = morphView.getImgWidth();
int height = morphView.getImgHeight();
double a = morphPos;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int posM = y * width + x;
// current scaling
double xS = scalingX * a + 1.0 * (1 - a);
double yS = scalingY * a + 1.0 * (1 - a);
// scaled coordinates in image A
int xA = (int) (x * xS);
int yA = (int) (y * yS);
int argb = 0xffffffff; // white pixel
if (xA >= 0 && xA < width && yA >= 0 && yA < height) {
// we are inside image A
argb = pixA[yA * width + xA];
}
int rM = (argb >> 16) & 0xff;
int gM = (argb >> 8) & 0xff;
int bM = (argb) & 0xff;
pixM[posM] = 0xFF000000 | (rM << 16) | (gM << 8) | bM;
}
}
}
public Morph() {
super(new BorderLayout(borderWidth, borderWidth));
setBorder(BorderFactory.createEmptyBorder(borderWidth, borderWidth, borderWidth, borderWidth));
// load the default images
File input1 = new File("RedApple.jpg");
if (!input1.canRead())
input1 = openFile("Open Image 1"); // file not found, choose another image
File input2 = new File("GreenApple.jpg");
if (!input2.canRead())
input2 = openFile("Open Image 2"); // file not found, choose another image
startView = new ImageView(input1);
startView.setMaxSize(new Dimension(maxWidth, maxHeight));
endView = new ImageView(input2);
endView.setMaxSize(new Dimension(maxWidth, maxHeight));
// create empty image for morphing
morphView = new ImageView(startView.getImgWidth(), startView.getImgHeight());
morphView.setMaxSize(new Dimension(maxWidth, maxHeight));
// control panel
JPanel controls = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.insets = new Insets(0, borderWidth, 0, 0);
// transmission methods
String[] methodNames = {
"Cross-fading",
"Scale left image",
"Scale right image",
"Scale & move left image",
"Scale & move right image",
"Morphing"
};
method = new JComboBox<String>(methodNames);
method.setSelectedIndex(0); // set initial method
method.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
calculate();
}
});
// morphing position
JLabel morphLabel = new JLabel("Morphing Position:");
morphPos = 0;
morphSlider =
new JSlider(JSlider.HORIZONTAL, 0, sliderGranularity, (int) (morphPos * sliderGranularity));
morphSlider.addChangeListener(
new ChangeListener() {
public void stateChanged(ChangeEvent e) {
morphPos = morphSlider.getValue() / (double) sliderGranularity;
calculate();
}
});
controls.add(method, c);
controls.add(morphLabel, c);
controls.add(morphSlider, c);
// images
JPanel images = new JPanel(new GridLayout(1, 3));
images.add(startView);
images.add(morphView);
images.add(endView);
// status panel
JPanel status = new JPanel(new GridLayout(1, 3));
// some status text
statusLine = new JLabel(" ");
status.add(statusLine, c);
add(controls, BorderLayout.NORTH);
add(images, BorderLayout.CENTER);
add(status, BorderLayout.SOUTH);
calculate();
}
