Implemented generating QR code

EpcQrCode/build.gradle.kts

@@ -53,7 +53,7 @@ kotlin {
     sourceSets {
         val commonMain by getting {
             dependencies {
-
+                api("com.soywiz.korlibs.korim:korim:2.6.2")
             }
         }
         val commonTest by getting {

EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCode.kt

@@ -0,0 +1,13 @@
+package net.codinux.banking.epcqrcode
+
+import com.soywiz.korim.bitmap.Bitmap32
+
+
+open class EpcQrCode(
+  open val bitmap: Bitmap32
+) {
+
+  open val bytes: ByteArray
+    get() = bitmap.extractBytes()
+
+}

EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeGenerator.kt

@@ -1,9 +1,20 @@
 package net.codinux.banking.epcqrcode
 
+import com.soywiz.korim.qr.QR
+import com.soywiz.korim.qr.QRErrorCorrectLevel
+
 
 open class EpcQrCodeGenerator {
 
 
+    open fun generateEpcQrCode(param: EpcQrCodeConfig): EpcQrCode {
+        val qrCode = QR(correctLevel = QRErrorCorrectLevel.M)
+
+        val qrCodeBitmap = qrCode.msg(generateAsString(param))
+
+        return EpcQrCode(qrCodeBitmap)
+    }
+
     open fun generate(param: EpcQrCodeConfig): EpcQrCodeValues {
         return EpcQrCodeValues(
             EpcQrCodeValues.ServiceTagDefaultValue,

EpcQrCode/src/jvmMain/kotlin/net/codinux/banking/epcqrcode/Extensions.kt

@@ -0,0 +1,8 @@
+package net.codinux.banking.epcqrcode
+
+import com.soywiz.korim.awt.toAwt
+import java.awt.image.BufferedImage
+
+
+val EpcQrCode.image: BufferedImage
+  get() = this.bitmap.toAwt()

EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/Extensions.kt

@@ -1,10 +1,16 @@
 package net.codinux.banking.epcqrcode
 
 import android.content.Context
+import android.graphics.Bitmap
 import android.os.IBinder
 import android.view.View
 import android.view.inputmethod.InputMethodManager
 import com.google.android.material.textfield.TextInputEditText
+import com.soywiz.korim.format.toAndroidBitmap
+
+
+val EpcQrCode.image: Bitmap
+    get() = this.bitmap.toAndroidBitmap()
 
 
 fun Context.hideKeyboard(anyViewInHierarchy: View, flags: Int = 0) {

EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt

@@ -33,13 +33,10 @@ class MainActivity : AppCompatActivity() {
             val density = resources.displayMetrics.density
             val config = EncodeToQrCodeConfig((EncodeToQrCodeConfig.DefaultWidth * density).toInt(), (EncodeToQrCodeConfig.DefaultHeight * density).toInt())
 
-            val qrCodeContent = EpcQrCodeGenerator().generateAsString(param)
-
-            // TODO: this takes a very long time. Improve it
-            val generatedQrCode = QrCodeGenerator().generateQrCode(qrCodeContent, config)
+            val epcQrCode = EpcQrCodeGenerator().generateEpcQrCode(param)
 
             runOnUiThread {
-                done(generatedQrCode)
+                done(epcQrCode.image)
             }
         }
     }

EpcQrCodeJavaFxApp/src/main/kotlin/net/codinux/banking/epcqrcode/windows/main/MainWindow.kt

@@ -50,11 +50,11 @@ class MainWindow : View(FX.messages["application.title"]) {
     private val isDestinationFileSelected = SimpleBooleanProperty(false)
 
 
-    private val qrCodeGenerator = QrCodeGenerator()
+    private val qrCodeGenerator = EpcQrCodeGenerator()
 
     private val generatedQrCodeImage = SimpleObjectProperty<Image>()
 
-    private var generatedQrCodeBytes: ByteArray? = null // couldn't find no working way to get image bytes from image -> also saving pure bytes in memory (what a waste)
+    private var generatedEpcQrCode: EpcQrCode? = null
 
 
     private val serializer = JacksonJsonSerializer()
@@ -267,21 +267,20 @@ class MainWindow : View(FX.messages["application.title"]) {
     }
 
     private fun generateQrCode() {
-        val param = EpcQrCodeConfig(receiver.value, iban.value, bic.value, amount.value, reference.value)
-        val qrCodeContent = EpcQrCodeGenerator().generateAsString(param)
+        val config = EpcQrCodeConfig(receiver.value, iban.value, bic.value, amount.value, reference.value)
 
-        generatedQrCodeImage.value = generateQrCode(qrCodeContent)
+        generatedQrCodeImage.value = generateQrCode(config)
 
         currentStage?.sizeToScene()
 
         saveSettings() // TODO: actually a side effect
     }
 
-    private fun generateQrCode(informationToEncode: String): Image? {
+    private fun generateQrCode(config: EpcQrCodeConfig): Image? {
         try {
-            generatedQrCodeBytes = qrCodeGenerator.generateQrCode(informationToEncode)
+            generatedEpcQrCode = qrCodeGenerator.generateEpcQrCode(config)
 
-            return Image(ByteArrayInputStream(generatedQrCodeBytes))
+            return generatedEpcQrCode?.image
         } catch (e: Exception) {
             logger.error("Could not generate QR code for $informationToEncode", e)
         }