paint method

@override void paint(Buffer buffer, Rect area, Style baseStyle)

Performs direct rendering modifications to the relative buffer.

Implementation

@override
void paint(Buffer buffer, Rect area, Style baseStyle) {
  if (!isVisible) return;

  final p = progress;
  // Oscillate brightness intensity using a sine wave
  final intensity = (sin(p * pi * pulses * 2 - pi / 2) + 1.0) / 2.0;

  final W = area.width;
  final H = area.height;

  for (var y = 0; y < H; y++) {
    for (var x = 0; x < W; x++) {
      final bgArgb = buffer.getBackground(x, y);
      final originalBg = bgArgb == 0
          ? (baseStyle.background ?? Colors.black)
          : Color.argb(bgArgb);

      // Cap blending factor at 60% to maintain baseline legibility of text content
      final blendedBg = interpolateColor(
        originalBg,
        flashColor,
        intensity * 0.6,
      );

      buffer.setAttributes(x, y, bg: blendedBg.argb);
    }
  }
}