public void addFilter(JMenu menu, final ImageFilter f) {
JMenuItem item = new JMenuItem(f.getMenuName());
menu.add(item);
item.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
swapImages();
f.apply(pic1, pic2);
lab.setIcon(pic2.getJLabel().getIcon());
sliderPanel.setVisible(false);
pack();
repaint();
}
});
}
/**
* Do the filter operation
*
* @param src The source BufferedImage. Can be any type.
* @param dst The destination image. If not null, must be of type TYPE_INT_RGB, TYPE_INT_ARGB or
* TYPE_INT_ARGB_PRE
* @return the filtered image
*/
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int width = src.getWidth();
int height = src.getHeight();
BufferedImageConsumer consumer = new BufferedImageConsumer(dst);
ImageFilter fltr = filter.getFilterInstance(consumer);
fltr.setDimensions(width, height);
/*
ColorModel cm = src.getColorModel();
if (cm.getPixelSize() == 8) {
// byte. indexed or gray:
WritableRaster raster = src.getRaster();
byte pixels[] = new byte[width];
// calculate scanline by scanline in order to safe memory.
// It also seems to run faster like that
for (int y = 0; y < height; y++) {
raster.getDataElements(0, y, width, 1, pixels);
fltr.setPixels(0, y, width, 1, cm, pixels, 0, width);
}
} else {
// integer, use the simple rgb mode:
WritableRaster raster = src.getRaster();
int pixels[] = new int[width];
// calculate scanline by scanline in order to safe memory.
// It also seems to run faster like that
for (int y = 0; y < height; y++) {
raster.getDataElements(0, y, width, 1, pixels);
fltr.setPixels(0, y, width, 1, cm, pixels, 0, width);
}
}
*/
// Always work in integer mode. this is more effective, and most
// filters convert to integer internally anyhow
ColorModel cm = new SimpleColorModel();
// Create a BufferedImage of only 1 pixel height for fetching the rows of the image in the
// correct format (ARGB)
// This speeds up things by more than factor 2, compared to the standard BufferedImage.getRGB
// solution,
// which is supposed to be fast too. This is probably the case because drawing to BufferedImages
// uses
// very optimized code which may even be hardware accelerated.
BufferedImage row = new BufferedImage(width, 1, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = row.createGraphics();
int pixels[] = ((DataBufferInt) row.getRaster().getDataBuffer()).getData();
// Make sure alpha values do not add up for each row:
g2d.setComposite(AlphaComposite.Src);
// Calculate scanline by scanline in order to safe memory.
// It also seems to run faster like that
for (int y = 0; y < height; y++) {
g2d.drawImage(src, null, 0, -y);
// Now pixels contains the rgb values of the row y!
// filter this row now:
fltr.setPixels(0, y, width, 1, cm, pixels, 0, width);
}
g2d.dispose();
// The consumer now contains the filtered image, return it.
return consumer.getImage();
}