temporarily revert jzbar application image loading

build.gradle

@@ -206,8 +206,8 @@ jlink {
                    'glob:/org.hid4java/win32-*/**,' +
                    'glob:/openpnp.capture.java/darwin-*/**,' +
                    'glob:/openpnp.capture.java/linux-*/**,' +
-                   'glob:/openpnp.capture.java/win32-*/**,' +
-                   'glob:/io.github.doblon8.jzbar/native/**']
+                   'glob:/openpnp.capture.java/win32-*/**']
+               // TODO: exclude glob:/io.github.doblon8.jzbar/native/** once jzbar supports pre-loaded natives
     launcher {
         name = 'sparrow'
         jvmArgs = ["--enable-native-access=com.sparrowwallet.drongo",
@@ -401,7 +401,7 @@ def nativeLibJars = [
         'openpnp-capture-java': "${jnaPlatform}/*",
         'jSerialComm-'        : "${serialOs}/${serialArch}/*",
         'usb4java-'           : "org/usb4java/${jnaPlatform}/*",
-        'jzbar-'              : "native/${osName}/${osArch}/*",
+        // TODO: add 'jzbar-' once jzbar supports pre-loaded natives
 ]
 
 tasks.register('extractNativeLibraries') {

src/main/java/com/sparrowwallet/sparrow/io/ZBar.java

@@ -10,15 +10,31 @@ import org.slf4j.LoggerFactory;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.awt.image.DataBufferByte;
+import java.io.File;
 
 public class ZBar {
     private static final Logger log = LoggerFactory.getLogger(ZBar.class);
+    private static boolean zbarLoaded;
 
     public static boolean isEnabled() {
         return com.sparrowwallet.sparrow.io.Config.get().isUseZbar();
     }
 
+    private static synchronized void loadZBar() {
+        if(!zbarLoaded) {
+            String javaHome = System.getProperty("java.home");
+            if(javaHome != null) {
+                File libFile = new File(javaHome, "lib" + java.io.File.separator + System.mapLibraryName("zbar"));
+                if(libFile.exists()) {
+                    System.load(libFile.getAbsolutePath());
+                }
+            }
+            zbarLoaded = true;
+        }
+    }
+
     public static Scan scan(BufferedImage bufferedImage) {
+        loadZBar();
         try {
             BufferedImage grayscale = new BufferedImage(bufferedImage.getWidth(), bufferedImage.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
             Graphics2D g2d = (Graphics2D)grayscale.getGraphics();