surecart / app / src / Support / ColorService.php

ColorService.php in SureCart – Ecommerce Made Easy For Selling Physical Products, Digital Downloads, Subscriptions, Donations, & Payments 4.2.3, at app/src/Support/ColorService.php

52 lines 1.2 KB

Raw Download Zip

1	<?php
2
3	namespace SureCart\Support;
4
5	/**
6	* Color service.
7	*/
8	class ColorService {
9	/**
10	* Calculate the foreground color based on the background color.
11	*
12	* @param string $color The background color.
13	* @return string The foreground color.
14	*/
15	public function calculateForegroundColor( $color ) {
16	list($red, $green, $blue) = $this->destructureColorToRgb( $color );
17	$brightness = $this->calculateBrightness( $red, $green, $blue );
18	return $this->allocateWhiteOrBlack( $brightness );
19	}
20
21	/**
22	* Destructure the color to RGB.
23	*
24	* @param string $color The color.
25	*/
26	private function destructureColorToRgb( $color ) {
27	return str_split( $color, 2 );
28	}
29
30	/**
31	* Calculate the brightness.
32	*
33	* @param string $red The red.
34	* @param string $green The green.
35	* @param string $blue The blue.
36	* @return string
37	*/
38	private function calculateBrightness( $red, $green, $blue ) {
39	return ( hexdec( $red ) * 0.299 ) + ( hexdec( $green ) * 0.587 ) + ( hexdec( $blue ) * 0.114 );
40	}
41
42	/**
43	* Allocate white or black.
44	*
45	* @param string $brightness The brightness.
46	* @return string
47	*/
48	private function allocateWhiteOrBlack( $brightness ) {
49	return ( $brightness > 180 ) ? '000000' : 'ffffff';
50	}
51	}
52