add zbar qr reader for all qr scans

2026-08-10 16:43:14 +00:00 · 2023-07-14 15:04:27 +02:00
parent 0a469a380b
commit 96fd824a3e
16 changed files with 1038 additions and 0 deletions
@@ -0,0 +1,118 @@
+package net.sourceforge.zbar;
+
+import com.sparrowwallet.sparrow.net.NativeUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferByte;
+import java.util.Iterator;
+
+public class ZBar {
+    private static final Logger log = LoggerFactory.getLogger(ZBar.class);
+
+    private final static boolean enabled;
+
+    static { // static initializer
+        enabled = loadLibrary();
+    }
+
+    public static boolean isEnabled() {
+        return enabled;
+    }
+
+    public static Scan scan(BufferedImage bufferedImage) {
+        BufferedImage grayscale = new BufferedImage(bufferedImage.getWidth(), bufferedImage.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
+        Graphics2D g2d = (Graphics2D)grayscale.getGraphics();
+        g2d.drawImage(bufferedImage, 0, 0, null);
+        g2d.dispose();
+
+        byte[] data = convertToY800(grayscale);
+
+        try(Image image = new Image()) {
+            image.setSize(grayscale.getWidth(), grayscale.getHeight());
+            image.setFormat("Y800");
+            image.setData(data);
+
+            try(ImageScanner scanner = new ImageScanner()) {
+                scanner.setConfig(Symbol.NONE, Config.ENABLE, 0);
+                scanner.setConfig(Symbol.QRCODE, Config.ENABLE, 1);
+                int result = scanner.scanImage(image);
+                if(result != 0) {
+                    try(SymbolSet results = scanner.getResults()) {
+                        Scan scan = null;
+                        for(Iterator<Symbol> iter = results.iterator(); iter.hasNext(); ) {
+                            try(Symbol symbol = iter.next()) {
+                                scan = new Scan(symbol.getDataBytes(), symbol.getData());
+                            }
+                        }
+                        return scan;
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
+
+    private static byte[] convertToY800(BufferedImage image) {
+        // Ensure the image is grayscale
+        if (image.getType() != BufferedImage.TYPE_BYTE_GRAY) {
+            throw new IllegalArgumentException("Input image must be grayscale");
+        }
+
+        // Get the underlying byte array of the image data
+        byte[] imageData = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
+
+        // Check if the image size is even
+        int width = image.getWidth();
+        int height = image.getHeight();
+        if (width % 2 != 0 || height % 2 != 0) {
+            throw new IllegalArgumentException("Image dimensions must be even");
+        }
+
+        // Prepare the output byte array in Y800 format
+        byte[] outputData = new byte[width * height];
+        int outputIndex = 0;
+
+        // Convert the grayscale image data to Y800 format
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                int pixel = imageData[y * width + x] & 0xFF; // Extract the grayscale value
+
+                // Write the grayscale value to the output byte array
+                outputData[outputIndex++] = (byte) pixel;
+            }
+        }
+
+        return outputData;
+    }
+
+    private static boolean loadLibrary() {
+        try {
+            String osName = System.getProperty("os.name");
+            String osArch = System.getProperty("os.arch");
+            if(osName.startsWith("Mac") && osArch.equals("aarch64")) {
+                NativeUtils.loadLibraryFromJar("/native/osx/aarch64/libzbar.dylib");
+            } else if(osName.startsWith("Mac")) {
+                NativeUtils.loadLibraryFromJar("/native/osx/x64/libzbar.dylib");
+            } else if(osName.startsWith("Windows")) {
+                NativeUtils.loadLibraryFromJar("/native/windows/x64/iconv-2.dll");
+                NativeUtils.loadLibraryFromJar("/native/windows/x64/zbar.dll");
+            } else if(osArch.equals("aarch64")) {
+                NativeUtils.loadLibraryFromJar("/native/linux/aarch64/libzbar.so");
+            } else {
+                NativeUtils.loadLibraryFromJar("/native/linux/x64/libzbar.so");
+            }
+
+            return true;
+        } catch(Exception e) {
+            log.warn("Could not load ZBar native libraries, disabling. " + e.getMessage());
+        }
+
+        return false;
+    }
+
+    public record Scan(byte[] rawData, String stringData) {}
+}