// IMPORT THE ZXING4PROCESSING LIBRARY AND DECLARE A ZXING4P OBJECT
import com.cage.zxing4p3.*;
ZXING4P zxing4p;
// PROCESSING VIDEO LIBRARY
import processing.video.*;
Capture video;
// PIMAGE WITH THE BARCODES TO DETECT
PImage scanArea;
// TEXT THAT WAS FOUND
String decodedText;
String latestDecodedText = “”;
// FORMAT OF THE LATEST FOUND BARCODE
String barcodeFormat = “”;
int txtWidth;
// FOR THE VIEW FINDER AND SCAN AREA
int frameWidth = 240;
int frameHeight = 260;
int lineSize = 40;
// CORNERS OF THE VIEW FINDER
PVector ul, ur, ll, lr;
// LIST WITH BARCODE TYPES TO LOOK FOR
ArrayList barcodeTypes = new ArrayList();
/*****************************************************************************
*
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void setup() {
size(640, 480);
// LAYOUT
textAlign(CENTER);
textSize(30);
// CREATE CAPTURE
video = new Capture(this, width, height);
// START CAPTURING
video.start();
// CREATE A NEW EN-/DECODER INSTANCE
zxing4p = new ZXING4P();
// DISPLAY VERSION INFORMATION
zxing4p.version();
// UPPER LEFT CORNER OF THE VIEW FINDER
ul = new PVector((width - frameWidth) >> 1, (height - frameHeight) >> 1);
// UPPER RIGHT CORNER OF THE VIEW FINDER
ur = new PVector(ul.x + frameWidth, ul.y);
// LOWER LEFT CORNER OF THE VIEW FINDER
ll = new PVector(ul.x, ul.y + frameHeight);
// LOWER RIGHT CORNER OF THE VIEW FINDER
lr = new PVector(ur.x, ur.y + frameHeight);
// AREA TO SCAN
scanArea = createImage(frameWidth, frameHeight, RGB);
// BARCODE TYPES THAT WILL BE SCANNED FOR
// SUPPORTED BARCODE TYPES:
// AZTEC
// CODABAR
// CODE_128
// CODE_39
// CODE_93
// DATA_MATRIX
// EAN_13
// EAN_8
// ITF
// MAXICODE
// PDF_417
// QR_CODE
// RSS_14
// RSS_EXPANDED
// UPC_A
// UPC_E
// UPC_EAN_EXTENSION
barcodeTypes.add(“EAN_8”);
barcodeTypes.add(“EAN_13”);
barcodeTypes.add(“DATA_MATRIX”);
barcodeTypes.add(“QR_CODE”);
} // setup()
/*****************************************************************************
*
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void draw() {
background(0);
// UPDATE CAPTURE
if (video.available()) video.read();
// DISPLAY VIDEO CAPTURE
set(0, 0, video);
if (frameCount % 50 == 0) {
// COPY THE VIEW FINDER AREA TO THE SCAN AREA
scanArea.copy(video, (int)ul.x, (int)ul.y, frameWidth, frameHeight, 0, 0, frameWidth, frameHeight);
}
// DISPLAY VIEW FINDER
pushStyle();
noFill();
strokeWeight(4);
stroke(255, 0, 0);
line(ul.x, ul.y, ul.x + lineSize, ul.y);
line(ul.x, ul.y, ul.x, ul.y + lineSize);
line(ur.x - lineSize, ur.y, ur.x, ur.y);
line(ur.x, ur.y, ur.x, ur.y + lineSize);
line(ll.x, ll.y, ll.x + lineSize, ll.y);
line(ll.x, ll.y - lineSize, ll.x, ll.y);
line(lr.x - lineSize, lr.y, lr.x, lr.y);
line(lr.x, lr.y - lineSize, lr.x, lr.y);
popStyle();
// DISPLAY LATEST DECODED TEXT AND FORMAT
if (!latestDecodedText.equals("")) {
pushStyle();
txtWidth = int(textWidth(latestDecodedText + " (" + barcodeFormat + “)”));
fill(0, 150);
rect((width>>1) - (txtWidth>>1) - 5, 15, txtWidth + 10, 36);
fill(255, 255, 0);
text(latestDecodedText + " (" + barcodeFormat + “)”, width>>1, 43);
popStyle();
} // if (!latestDecodedText.equals(""))
// TRY TO DETECT AND DECODE A QRCODE IN THE VIDEO CAPTURE
// multiFormatReader(PImage img, boolean tryHarder)
// multiFormatReader(PImage img, boolean tryHarder, ArrayList barcodeTypes)
// img: image to scan for barcodes
// tryHarder: false => fast detection (less accurate)
// true => best detection (little slower)
// barcodeTypes: barcode types to scan for
try {
// SCAN FOR ALL AVAILABLE BARCODE TYPES
//decodedText = zxing4p.barcodeReader(scanArea, false);
// SCAN FOR SPECIFIC BARCODE TYPES
decodedText = zxing4p.barcodeReader(scanArea, false, barcodeTypes);
// GET THE TYPE OF THE LAST SCANNED BARCODE
barcodeFormat = zxing4p.getBarcodeFormat();
}
catch (Exception e) {
// NOT FOUND
decodedText = “”;
} // try
if (!decodedText.equals("")) {
// FOUND A BARCODE!
if (latestDecodedText.equals("") || (!latestDecodedText.equals(decodedText))) {
println(“Zxing4processing detected: " + decodedText + " (” + barcodeFormat + “)”);
}
latestDecodedText = decodedText;
} // if (!decodedText.equals(""))
} // draw()
/*****************************************************************************
*
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void keyPressed() {
switch(key) {
case ’ ':
// RESET
decodedText = “”;
latestDecodedText = “”;
break;
} // switch
} // keyPressed()
