wpfunnels / vendor / intervention / image / src / Intervention / Image / Gd / Commands / MaskCommand.php

MaskCommand.php in WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell 3.13.3, at vendor/intervention/image/src/Intervention/Image/Gd/Commands/MaskCommand.php

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1	<?php
2
3	namespace Intervention\Image\Gd\Commands;
4
5	use Intervention\Image\Commands\AbstractCommand;
6
7	class MaskCommand extends AbstractCommand
8	{
9	/**
10	* Applies an alpha mask to an image
11	*
12	* @param \Intervention\Image\Image $image
13	* @return boolean
14	*/
15	public function execute($image)
16	{
17	$mask_source = $this->argument(0)->value();
18	$mask_w_alpha = $this->argument(1)->type('bool')->value(false);
19
20	$image_size = $image->getSize();
21
22	// create empty canvas
23	$canvas = $image->getDriver()->newImage($image_size->width, $image_size->height, [0,0,0,0]);
24
25	// build mask image from source
26	$mask = $image->getDriver()->init($mask_source);
27	$mask_size = $mask->getSize();
28
29	// resize mask to size of current image (if necessary)
30	if ($mask_size != $image_size) {
31	$mask->resize($image_size->width, $image_size->height);
32	}
33
34	imagealphablending($canvas->getCore(), false);
35
36	if ( ! $mask_w_alpha) {
37	// mask from greyscale image
38	imagefilter($mask->getCore(), IMG_FILTER_GRAYSCALE);
39	}
40
41	// redraw old image pixel by pixel considering alpha map
42	for ($x=0; $x < $image_size->width; $x++) {
43	for ($y=0; $y < $image_size->height; $y++) {
44
45	$color = $image->pickColor($x, $y, 'array');
46	$alpha = $mask->pickColor($x, $y, 'array');
47
48	if ($mask_w_alpha) {
49	$alpha = $alpha[3]; // use alpha channel as mask
50	} else {
51
52	if ($alpha[3] == 0) { // transparent as black
53	$alpha = 0;
54	} else {
55
56	// $alpha = floatval(round((($alpha[0] + $alpha[1] + $alpha[3]) / 3) / 255, 2));
57
58	// image is greyscale, so channel doesn't matter (use red channel)
59	$alpha = floatval(round($alpha[0] / 255, 2));
60	}
61
62	}
63
64	// preserve alpha of original image...
65	if ($color[3] < $alpha) {
66	$alpha = $color[3];
67	}
68
69	// replace alpha value
70	$color[3] = $alpha;
71
72	// redraw pixel
73	$canvas->pixel($color, $x, $y);
74	}
75	}
76
77
78	// replace current image with masked instance
79	$image->setCore($canvas->getCore());
80
81	return true;
82	}
83	}
84