woocommerce-pos / vendor_prefixed / chillerlan / php-qrcode / src / Common / LuminanceSourceAbstract.php

LuminanceSourceAbstract.php in WCPOS – Point of Sale (POS) plugin for WooCommerce 1.10.18, at vendor_prefixed/chillerlan/php-qrcode/src/Common/LuminanceSourceAbstract.php

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1	<?php
2
3	/**
4	* Class LuminanceSourceAbstract
5	*
6	* @created 24.01.2021
7	* @author ZXing Authors
8	* @author Ashot Khanamiryan
9	* @author Smiley <smiley@chillerlan.net>
10	* @copyright 2021 Smiley
11	* @license Apache-2.0
12	*/
13	namespace WCPOS\Vendor\chillerlan\QRCode\Common;
14
15	use WCPOS\Vendor\chillerlan\QRCode\Decoder\QRCodeDecoderException;
16	use WCPOS\Vendor\chillerlan\QRCode\QROptions;
17	use WCPOS\Vendor\chillerlan\Settings\SettingsContainerInterface;
18	use function array_slice, array_splice, file_exists, is_file, is_readable, realpath;
19	/**
20	* The purpose of this class hierarchy is to abstract different bitmap implementations across
21	* platforms into a standard interface for requesting greyscale luminance values.
22	*
23	* @author dswitkin@google.com (Daniel Switkin)
24	*/
25	abstract class LuminanceSourceAbstract implements LuminanceSourceInterface
26	{
27	/** @var \chillerlan\QRCode\QROptions\|\chillerlan\Settings\SettingsContainerInterface */
28	protected SettingsContainerInterface $options;
29	protected array $luminances;
30	protected int $width;
31	protected int $height;
32	/**
33	*
34	*/
35	public function __construct(int $width, int $height, ?SettingsContainerInterface $options = null)
36	{
37	$this->width = $width;
38	$this->height = $height;
39	$this->options = $options ?? new QROptions();
40	$this->luminances = [];
41	}
42	/** @inheritDoc */
43	public function getLuminances() : array
44	{
45	return $this->luminances;
46	}
47	/** @inheritDoc */
48	public function getWidth() : int
49	{
50	return $this->width;
51	}
52	/** @inheritDoc */
53	public function getHeight() : int
54	{
55	return $this->height;
56	}
57	/**
58	* @inheritDoc
59	* @throws \chillerlan\QRCode\Decoder\QRCodeDecoderException
60	*/
61	public function getRow(int $y) : array
62	{
63	if ($y < 0 \|\| $y >= $this->getHeight()) {
64	throw new QRCodeDecoderException('Requested row is outside the image: ' . $y);
65	}
66	$arr = [];
67	array_splice($arr, 0, $this->width, array_slice($this->luminances, $y * $this->width, $this->width));
68	return $arr;
69	}
70	/**
71	*
72	*/
73	protected function setLuminancePixel(int $r, int $g, int $b) : void
74	{
75	$this->luminances[] = $r === $g && $g === $b ? $r : ($r + 2 * $g + $b) / 4;
76	// (((($r + 2 * $g + $b) / 4) + 128) % 256) - 128;
77	}
78	/**
79	* @throws \chillerlan\QRCode\Decoder\QRCodeDecoderException
80	*/
81	protected static function checkFile(string $path) : string
82	{
83	$path = \trim($path);
84	if (!file_exists($path) \|\| !is_file($path) \|\| !is_readable($path)) {
85	throw new QRCodeDecoderException('invalid file: ' . $path);
86	}
87	$realpath = realpath($path);
88	if ($realpath === \false) {
89	throw new QRCodeDecoderException('unable to resolve path: ' . $path);
90	}
91	return $realpath;
92	}
93	}
94