public static void main(String[] argv) {
try {
app = new TwainMemApplet();
} catch (Exception e) {
e.printStackTrace();
}
}
public void init() {
setLayout(new GridLayout(0, 2));
selectButton = new Button("select");
add(selectButton);
selectButton.addActionListener(this);
acquireButton = new Button("acquire");
add(acquireButton);
acquireButton.addActionListener(this);
scanner = Scanner.getDevice();
scanner.addListener(this);
try {
File home = new File(System.getProperty("user.home"));
dir = new File(home, "My Documents");
if (!dir.exists()) {
dir = home;
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void update(ScannerIOMetadata.Type type, ScannerIOMetadata metadata) {
if (type.equals(ScannerIOMetadata.MEMORY)) {
try {
if (metadata instanceof TwainIOMetadata) { // TWAIN only!
TwainIOMetadata twaindata = (TwainIOMetadata) metadata;
TwainTransfer.MemoryTransfer.Info info = twaindata.getMemory();
byte[] twainbuf = info.getBuffer();
int width = info.getWidth();
int height = info.getHeight();
BufferedImage image = null;
if (twainimgtype == TwainConstants.TWPT_BW) {
width = info.getBytesPerRow() * 8; // the cheap way out ;)
image = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY);
byte[] imgbuf = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
System.arraycopy(twainbuf, 0, imgbuf, 0, imgbuf.length);
} else if (twainimgtype == TwainConstants.TWPT_GRAY) {
width = info.getBytesPerRow(); // the cheap way out ;)
image = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
byte[] imgbuf = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
System.arraycopy(twainbuf, 0, imgbuf, 0, imgbuf.length);
} else if (twainimgtype == TwainConstants.TWPT_RGB) {
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
/*
Hint:
If using TWPT_RGB - BufferedImage.TYPE_INT_RGB : 3 bytes to 1 int
If using TWPT_RGB - BufferedImage.TYPE_3BYTE_BGR : RGB -> BGR
*/
int bpr = info.getBytesPerRow();
int r, g, b, row = 0, pixel = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
r = twainbuf[pixel++] & 0x00FF;
g = twainbuf[pixel++] & 0x00FF;
b = twainbuf[pixel++] & 0x00FF;
image.setRGB(x, y, (r << 16) | (g << 8) | b);
}
row += bpr;
pixel = row;
}
}
String fn = "image" + transferCount + ".png";
File file = (dir != null) ? new File(dir, fn) : new File(fn);
System.out.println(file.getCanonicalPath());
ImageIO.write(image, "png", file);
transferCount++;
System.out.println("info = " + info.toString() + "\n");
}
} catch (Exception e) {
e.printStackTrace();
}
} else if (type.equals(ScannerIOMetadata.NEGOTIATE)) {
transferCount = 0;
ScannerDevice device = metadata.getDevice();
try {
device.setShowUserInterface(false);
device.setShowProgressBar(true);
device.setResolution(100);
if (metadata instanceof TwainIOMetadata) { // TWAIN only!
TwainSource source = ((TwainIOMetadata) metadata).getSource();
source.setCapability(TwainConstants.ICAP_PIXELTYPE, twainimgtype);
System.out.println(source.getCapability(TwainConstants.ICAP_PIXELTYPE).toString());
source.setXferMech(TwainConstants.TWSX_MEMORY);
}
} catch (Exception e) {
e.printStackTrace();
}
} else if (type.equals(ScannerIOMetadata.STATECHANGE)) {
System.err.println(metadata.getStateStr());
} else if (type.equals(ScannerIOMetadata.EXCEPTION)) {
metadata.getException().printStackTrace();
}
}