compose method

Future<Image> compose({ required ProcessedFrame frame, required VirtualBackground background, })

Compose a processed frame with a virtual background

This is the main compositing function that blends:

1. The person (from original frame, masked by segmentation)
2. The background (image, color, or blurred version of original)

Returns a new ui.Image with the composed result

Implementation

Future<ui.Image> compose({
  required ProcessedFrame frame,
  required VirtualBackground background,
}) async {
  switch (background.type) {
    case BackgroundType.image:
      return _composeWithImage(frame, background);
    case BackgroundType.blur:
      return _composeWithBlur(frame, background.blurIntensity);
    case BackgroundType.color:
      return _composeWithColor(frame, background.color ?? Colors.green);
    case BackgroundType.video:
      // Video backgrounds would need frame-by-frame video processing
      // For now, treat as no background
      return _createImageFromBytes(
          frame.originalBytes, frame.width, frame.height);
    case BackgroundType.none:
      // No processing needed - return original frame
      return _createImageFromBytes(
          frame.originalBytes, frame.width, frame.height);
  }
}