Fixed ECC in analyzer

Author: manuelbl

Demo-QRCode-Variety/Program.cs

@@ -41,6 +41,7 @@ internal static void Main()
             DoBasicDemo();
             DoVarietyDemo();
             DoEncodingDemo();
+            DoEmojiDemo();
             DoBinaryDemo();
         }
 
@@ -88,6 +89,13 @@ private static void DoEncodingDemo()
         }
 
 
+        private static void DoEmojiDemo()
+        {
+            var qr = QrCode.EncodeText("🎲 😇 🤒 🏌 ⏭ 🚍", QrCode.Ecc.Quartile);
+            SaveAsSvg(qr, "emojis-QR.svg", 4);
+        }
+
+
 
         private static void DoBinaryDemo()
         {

QrCodeAnalyzer/MainWindow.xaml

@@ -60,6 +60,8 @@
                 <Label Content="Error Correction:" HorizontalAlignment="Left" VerticalAlignment="Center" Padding="0,5,12,5"/>
                 <ComboBox x:Name="ErrorCorrectionCombo" HorizontalAlignment="Left" VerticalAlignment="Center" Width="100" Margin="0,6,24,6"
                   ItemsSource="{Binding Path=ErrorCorrectionLevels, Mode=OneTime}" DisplayMemberPath="Item1" SelectedValuePath="Item2" SelectedValue="{Binding Path=ErrorCorrection}"/>
+                <CheckBox x:Name="BoostEccCheckBox" Content="Fixed ECC" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="0,6,24,6"
+                  IsChecked="{Binding Path=FixedEcc, UpdateSourceTrigger=PropertyChanged}"/>
                 <Label Content="Border Width:" HorizontalAlignment="Left" VerticalAlignment="Center" Padding="0,5,12,5"/>
                 <TextBox x:Name="BorderWidthTextBox" Text="{Binding Path=BorderWidth, UpdateSourceTrigger=PropertyChanged}"
                  HorizontalAlignment="Left" VerticalAlignment="Center" Width="60" Margin="0,6" Padding="5,3"/>

QrCodeAnalyzer/MainWindowViewModel.cs

@@ -24,6 +24,7 @@ public sealed class MainWindowViewModel : INotifyPropertyChanged
     private string _text = "QR code text";
     private int _borderWidth = 4;
     private QrCode.Ecc _errorCorrection = QrCode.Ecc.Medium;
+    private bool fixedEcc = false;
     private int _dataMaskPattern = -1;
     private QrCodeBuilder.PenaltyInfo _penaltyDetails;
     private ImageSource? _qrCodeImage;
@@ -98,6 +99,18 @@ public QrCode.Ecc ErrorCorrection
         }
     }
 
+    public bool FixedEcc
+    {
+        get => fixedEcc;
+        set
+        {
+            if (fixedEcc == value) return;
+            fixedEcc = value;
+            UpdateQrCode();
+            OnPropertyChanged();
+        }
+    }
+
     public int DataMaskPattern
     {
         get => _dataMaskPattern;
@@ -162,7 +175,7 @@ public BitmapSource CreateClipboardBitmap()
     private void UpdateQrCode()
     {
         _debugInfo.ForcedDataMask = _dataMaskPattern;
-        var qrCode = QrCode.EncodeText(_text, _errorCorrection);
+        var qrCode = QrCode.EncodeTextAdvanced(_text, _errorCorrection, boostEcl: !fixedEcc);
         _currentQrCode = qrCode;
         SelectedDataMaskPattern = qrCode.Mask;
         PenaltyDetails = _debugInfo.Penalties[qrCode.Mask];

QrCodeGenerator/QrCodeBuilder.cs

@@ -33,6 +33,12 @@ static class QrCodeBuilder
 
         internal static QrCode Build(List<DataSegment> dataSegments, int ecc, int minVersion = 1, int maxVersion = 40, bool boostEcc = true)
         {
+#if DEBUG
+            if (DebugAccess != null)
+            {
+                DebugAccess.DataSegments = dataSegments;
+            }
+#endif
             var result = FindVersionAndEcc(dataSegments, ecc, minVersion, maxVersion, boostEcc);
             var version = result.Item1;
             ecc = result.Item2;
@@ -1006,6 +1012,7 @@ public class DebugInfo
         {
             public PenaltyInfo[] Penalties { get; } = new PenaltyInfo[8];
             public int ForcedDataMask { get; set; } = -1;
+            public List<DataSegment> DataSegments { get; set; }
         }
 
         public static DebugInfo DebugAccess { get; set; }