v1.0 Initial commit of project

vendor/khanamiryan/qrcode-detector-decoder/lib/Binarizer.php

@@ -0,0 +1,93 @@
+<?php
+/*
+* Copyright 2009 ZXing authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+namespace Zxing;
+
+use Zxing\Common\BitArray;
+use Zxing\Common\BitMatrix;
+
+/**
+ * This class hierarchy provides a set of methods to convert luminance data to 1 bit data.
+ * It allows the algorithm to vary polymorphically, for example allowing a very expensive
+ * thresholding technique for servers and a fast one for mobile. It also permits the implementation
+ * to vary, e.g. a JNI version for Android and a Java fallback version for other platforms.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+abstract class Binarizer
+{
+	protected function __construct(private $source)
+ {
+ }
+
+	/**
+	 * @return LuminanceSource
+	 */
+	final public function getLuminanceSource()
+	{
+		return $this->source;
+	}
+
+	/**
+	 * Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
+	 * cached data. Callers should assume this method is expensive and call it as seldom as possible.
+	 * This method is intended for decoding 1D barcodes and may choose to apply sharpening.
+	 * For callers which only examine one row of pixels at a time, the same BitArray should be reused
+	 * and passed in with each call for performance. However it is legal to keep more than one row
+	 * at a time if needed.
+	 *
+	 * @param $y   The row to fetch, which must be in [0, bitmap height)
+	 * @param An $row optional preallocated array. If null or too small, it will be ignored.
+	 *            If used, the Binarizer will call BitArray.clear(). Always use the returned object.
+	 *
+	 * @return array The array of bits for this row (true means black).
+	 * @throws NotFoundException if row can't be binarized
+	 */
+	abstract public function getBlackRow($y, $row);
+
+	/**
+	 * Converts a 2D array of luminance data to 1 bit data. As above, assume this method is expensive
+	 * and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
+	 * may not apply sharpening. Therefore, a row from this matrix may not be identical to one
+	 * fetched using getBlackRow(), so don't mix and match between them.
+	 *
+	 * @return BitMatrix The 2D array of bits for the image (true means black).
+	 * @throws NotFoundException if image can't be binarized to make a matrix
+	 */
+	abstract public function getBlackMatrix();
+
+	/**
+	 * Creates a new object with the same type as this Binarizer implementation, but with pristine
+	 * state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache
+	 * of 1 bit data. See Effective Java for why we can't use Java's clone() method.
+	 *
+	 * @param $source The LuminanceSource this Binarizer will operate on.
+	 *
+	 * @return Binarizer A new concrete Binarizer implementation object.
+	 */
+	abstract public function createBinarizer($source);
+
+	final public function getWidth()
+	{
+		return $this->source->getWidth();
+	}
+
+	final public function getHeight()
+	{
+		return $this->source->getHeight();
+	}
+}