feat: Implement LED offset in HyperionProcessor

HyperionProcessor.cpp

@@ -9,7 +9,8 @@ HyperionProcessor::HyperionProcessor(const LedLayout &layout, const QJsonObject
       _borderDetector(config.value("blackborderdetector").toObject()),
       _lastImageSize(0, 0),
       _colorSmoother(config.value("smoothing").toObject()),
-      _colorAlgorithm(config.value("colorAlgorithm").toString("mean_sqrt")) // Default to mean_sqrt
+      _colorAlgorithm(config.value("colorAlgorithm").toString("mean_sqrt")),
+      _offset(config.value("offset").toInt(0)) // Default offset is 0
 {
 }
 
@@ -40,7 +41,20 @@ QVector<QColor> HyperionProcessor::process(const QImage &image)
     QVector<QColor> calculatedColors = calculateLedColors(image);
 
     // 4. Apply smoothing
-    return _colorSmoother.smooth(calculatedColors);
+    QVector<QColor> finalColors = _colorSmoother.smooth(calculatedColors);
+
+    // 5. Apply offset if needed
+    if (_offset != 0 && !finalColors.isEmpty()) {
+        QVector<QColor> shiftedColors(finalColors.size());
+        int totalLeds = finalColors.size();
+
+        for (int i = 0; i < totalLeds; ++i) {
+            shiftedColors[i] = finalColors[(i + _offset) % totalLeds];
+        }
+        return shiftedColors;
+    }
+
+    return finalColors;
 }
 
 void HyperionProcessor::buildLedMap(int imageWidth, int imageHeight, const BlackBorder &border)

HyperionProcessor.h

@@ -29,6 +29,7 @@ private:
     LedLayout _layout;
     QJsonObject _config;
     QString _colorAlgorithm;
+    int _offset;
 
     BlackBorderDetector _borderDetector;
     BlackBorder _lastBorder;

main.cpp

@@ -181,6 +181,7 @@ int main(int argc, char *argv[])
     processorConfig["blackborderdetector"] = blackBorderDetectorConfig;
     processorConfig["smoothing"] = smoothingConfig;
     processorConfig["colorAlgorithm"] = qgetenv("HYPERION_GRABBER_COLOR_ALGORITHM").isEmpty() ? QString("mean_sqrt") : QString(qgetenv("HYPERION_GRABBER_COLOR_ALGORITHM"));
+    processorConfig["offset"] = qgetenv("HYPERION_GRABBER_OFFSET").isEmpty() ? 0 : qgetenv("HYPERION_GRABBER_OFFSET").toInt();
 
     QString wledColorOrder = qgetenv("HYPERION_GRABBER_WLED_COLOR_ORDER").isEmpty() ? QString("GRB") : QString(qgetenv("HYPERION_GRABBER_WLED_COLOR_ORDER"));