hand over finder pattern coordinates to the decoder result (#248)

(cherry picked from commit daf01b9)

Author: codemasher

src/Decoder/Decoder.php

@@ -29,6 +29,7 @@ final class Decoder{
 	private ?EccLevel    $eccLevel = null;
 	private ?MaskPattern $maskPattern = null;
 	private BitBuffer    $bitBuffer;
+	private Detector     $detector;
 
 	/**
 	 * Decodes a QR Code represented as a BitMatrix.
@@ -37,7 +38,8 @@ final class Decoder{
 	 * @throws \Throwable|\chillerlan\QRCode\Decoder\QRCodeDecoderException
 	 */
 	public function decode(LuminanceSourceInterface $source):DecoderResult{
-		$matrix = (new Detector($source))->detect();
+		$this->detector = new Detector($source);
+		$matrix         = $this->detector->detect();
 
 		try{
 			// clone the BitMatrix to avoid errors in case we run into mirroring
@@ -148,6 +150,7 @@ private function decodeBitStream(BitBuffer $bitBuffer):DecoderResult{
 			'data'                     => $result,
 			'version'                  => $this->version,
 			'eccLevel'                 => $this->eccLevel,
+			'finderPatterns'           => $this->detector->getFinderPatterns(),
 			'maskPattern'              => $this->maskPattern,
 			'structuredAppendParity'   => $parityData,
 			'structuredAppendSequence' => $symbolSequence,

src/Decoder/DecoderResult.php

@@ -20,13 +20,14 @@
  * applies to 2D barcode formats. For now, it contains the raw bytes obtained
  * as well as a String interpretation of those bytes, if applicable.
  *
- * @property \chillerlan\QRCode\Common\BitBuffer   $rawBytes
- * @property string                                $data
- * @property \chillerlan\QRCode\Common\Version     $version
- * @property \chillerlan\QRCode\Common\EccLevel    $eccLevel
- * @property \chillerlan\QRCode\Common\MaskPattern $maskPattern
- * @property int                                   $structuredAppendParity
- * @property int                                   $structuredAppendSequence
+ * @property \chillerlan\QRCode\Common\BitBuffer         $rawBytes
+ * @property string                                      $data
+ * @property \chillerlan\QRCode\Common\Version           $version
+ * @property \chillerlan\QRCode\Common\EccLevel          $eccLevel
+ * @property \chillerlan\QRCode\Common\MaskPattern       $maskPattern
+ * @property int                                         $structuredAppendParity
+ * @property int                                         $structuredAppendSequence
+ * @property \chillerlan\QRCode\Detector\FinderPattern[] $finderPatterns
  */
 final class DecoderResult{
 
@@ -37,6 +38,8 @@ final class DecoderResult{
 	private string      $data = '';
 	private int         $structuredAppendParity = -1;
 	private int         $structuredAppendSequence = -1;
+	/** @var \chillerlan\QRCode\Detector\FinderPattern[] */
+	private array       $finderPatterns = [];
 
 	/**
 	 * DecoderResult constructor.

src/Detector/Detector.php

@@ -25,6 +25,8 @@
 final class Detector{
 
 	private BitMatrix $matrix;
+	/** @var \chillerlan\QRCode\Detector\FinderPattern[] */
+	private array     $finderPatterns = [];
 
 	/**
 	 * Detector constructor.
@@ -33,11 +35,20 @@ public function __construct(LuminanceSourceInterface $source){
 		$this->matrix = (new Binarizer($source))->getBlackMatrix();
 	}
 
+	/**
+	 * @return \chillerlan\QRCode\Detector\FinderPattern[]
+	 */
+	public function getFinderPatterns():array{
+		return $this->finderPatterns;
+	}
+
 	/**
 	 * Detects a QR Code in an image.
 	 */
 	public function detect():BitMatrix{
-		[$bottomLeft, $topLeft, $topRight] = (new FinderPatternFinder($this->matrix))->find();
+		$this->finderPatterns = (new FinderPatternFinder($this->matrix))->find();
+
+		[$bottomLeft, $topLeft, $topRight] = $this->finderPatterns;
 
 		$moduleSize         = $this->calculateModuleSize($topLeft, $topRight, $bottomLeft);
 		$dimension          = $this->computeDimension($topLeft, $topRight, $bottomLeft, $moduleSize);