Function quantize1bit

lib/GfxRenderer/BitmapHelpers.cpp:97–109

1-bit noise dithering for fast home screen rendering Uses hash-based noise for consistent dithering that works well at small sizes

// 1-bit noise dithering for fast home screen rendering
// Uses hash-based noise for consistent dithering that works well at small sizes
uint8_t quantize1bit(int gray, int x, int y) {
  gray = adjustPixel(gray);

  // Generate noise threshold using integer hash (no regular pattern to alias)
  uint32_t hash = static_cast<uint32_t>(x) * 374761393u + static_cast<uint32_t>(y) * 668265263u;
  hash = (hash ^ (hash >> 13)) * 1274126177u;
  const int threshold = static_cast<int>(hash >> 24);  // 0-255

  // Simple threshold with noise: gray >= (128 + noise offset) -> white
  // The noise adds variation around the 128 midpoint
  const int adjustedThreshold = 128 + ((threshold - 128) / 2);  // Range: 64-192
  return (gray >= adjustedThreshold) ? 1 : 0;
}

void createBmpHeader(BmpHeader* bmpHeader, int width, int height, BmpRowOrder rowOrder) {
  if (!bmpHeader) return;