1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/chillerlan/php-qrcode/src/Detector/FinderPattern.php b/vendor/chillerlan/php-qrcode/src/Detector/FinderPattern.php
new file mode 100644
index 000000000..3ae4650ad
--- /dev/null
+++ b/vendor/chillerlan/php-qrcode/src/Detector/FinderPattern.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * Class FinderPattern
+ *
+ * @created      17.01.2021
+ * @author       ZXing Authors
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2021 Smiley
+ * @license      Apache-2.0
+ */
+
+namespace chillerlan\QRCode\Detector;
+
+use function sqrt;
+
+/**
+ * Encapsulates a finder pattern, which are the three square patterns found in
+ * the corners of QR Codes. It also encapsulates a count of similar finder patterns,
+ * as a convenience to the finder's bookkeeping.
+ *
+ * @author Sean Owen
+ */
+final class FinderPattern extends ResultPoint{
+
+	private int $count;
+
+	/**
+	 *
+	 */
+	public function __construct(float $posX, float $posY, float $estimatedModuleSize, ?int $count = null){
+		parent::__construct($posX, $posY, $estimatedModuleSize);
+
+		$this->count = ($count ?? 1);
+	}
+
+	/**
+	 *
+	 */
+	public function getCount():int{
+		return $this->count;
+	}
+
+	/**
+	 * @param \chillerlan\QRCode\Detector\FinderPattern $b second pattern
+	 *
+	 * @return float distance between two points
+	 */
+	public function getDistance(FinderPattern $b):float{
+		return self::distance($this->x, $this->y, $b->x, $b->y);
+	}
+
+	/**
+	 * Get square of distance between a and b.
+	 */
+	public function getSquaredDistance(FinderPattern $b):float{
+		return self::squaredDistance($this->x, $this->y, $b->x, $b->y);
+	}
+
+	/**
+	 * Combines this object's current estimate of a finder pattern position and module size
+	 * with a new estimate. It returns a new FinderPattern containing a weighted average
+	 * based on count.
+	 */
+	public function combineEstimate(float $i, float $j, float $newModuleSize):self{
+		$combinedCount = ($this->count + 1);
+
+		return new self(
+			($this->count * $this->x + $j) / $combinedCount,
+			($this->count * $this->y + $i) / $combinedCount,
+			($this->count * $this->estimatedModuleSize + $newModuleSize) / $combinedCount,
+			$combinedCount
+		);
+	}
+
+	/**
+	 *
+	 */
+	private static function squaredDistance(float $aX, float $aY, float $bX, float $bY):float{
+		$xDiff = ($aX - $bX);
+		$yDiff = ($aY - $bY);
+
+		return ($xDiff * $xDiff + $yDiff * $yDiff);
+	}
+
+	/**
+	 *
+	 */
+	public static function distance(float $aX, float $aY, float $bX, float $bY):float{
+		return sqrt(self::squaredDistance($aX, $aY, $bX, $bY));
+	}
+
+}