|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* Conversion Class |
|
4
|
|
|
* ================ |
|
5
|
|
|
* Responsible for all the conversion method between Hex, RGB, HSL, HSB, and CMYK |
|
6
|
|
|
*/ |
|
7
|
|
|
|
|
8
|
|
|
namespace projectcleverweb\color\traits; |
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* Conversion Class |
|
12
|
|
|
* ================ |
|
13
|
|
|
* Responsible for all the conversion method between Hex, RGB, HSL, HSB, and CMYK |
|
14
|
|
|
*/ |
|
15
|
|
|
trait converter { |
|
16
|
|
|
|
|
17
|
|
|
protected static function error($message) { |
|
18
|
|
|
return \projectcleverweb\color\error::trigger(0, $message); |
|
19
|
|
|
} |
|
20
|
|
|
|
|
21
|
|
|
protected static function _validate_array_input($input) { |
|
|
|
|
|
|
22
|
|
|
if (!is_array($input)) { |
|
23
|
|
|
static::error(sprintf( |
|
24
|
|
|
'%s input must be of type "array", input was of type "%s"', |
|
25
|
|
|
strtoupper(implode('', static::$valid_keys)), |
|
26
|
|
|
gettype($input) |
|
27
|
|
|
)); |
|
28
|
|
|
$input = static::$default_value; |
|
29
|
|
|
} |
|
30
|
|
|
$input = array_change_key_case($input); |
|
31
|
|
|
$array = static::$default_value; |
|
32
|
|
|
foreach (static::$valid_keys as $key) { |
|
33
|
|
|
if (!isset($input[$key])) { |
|
34
|
|
|
static::error(sprintf( |
|
35
|
|
|
'Key "%s" missing from %s array', |
|
36
|
|
|
$key, |
|
37
|
|
|
strtoupper(implode('', static::$valid_keys)) |
|
38
|
|
|
)); |
|
39
|
|
|
$input[$key] = $array[$key]; |
|
40
|
|
|
} |
|
41
|
|
|
$array[$key] = (float) filter_var($input[$key], FILTER_VALIDATE_FLOAT); |
|
42
|
|
|
} |
|
43
|
|
|
return $array; |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
public static function _validate_hex_input($input) { |
|
|
|
|
|
|
47
|
|
|
if (is_int($input)) { |
|
48
|
|
|
return str_pad(dechex($input % 16777216), 6, '0', STR_PAD_LEFT); |
|
49
|
|
|
} elseif (is_string($input)) { |
|
50
|
|
|
return static::_validate_hex_input_str($input); |
|
51
|
|
|
} |
|
52
|
|
|
static::error(sprintf( |
|
53
|
|
|
'hex input must be of type "string" or "integer", input was of type "%s"', |
|
54
|
|
|
gettype($input) |
|
55
|
|
|
)); |
|
56
|
|
|
return static::$default_value; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
protected static function _validate_hex_input_str(string $input) :string { |
|
60
|
|
|
$input = strtolower($input); |
|
61
|
|
|
if ($input[0] == '#') { |
|
62
|
|
|
$input = substr($input, 1); |
|
63
|
|
|
} |
|
64
|
|
|
if (!preg_match('([0-9a-f]{6}|[0-9a-f]{3})', $input)) { |
|
65
|
|
|
static::error('invalid hex string input'); |
|
66
|
|
|
return static::$default_value; |
|
67
|
|
|
} |
|
68
|
|
|
return static::_expand_hex_str($input); |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
protected static function _expand_hex_str(string $input) : string { |
|
72
|
|
|
if (strlen($input) == 3) { |
|
73
|
|
|
$input = $input[0].$input[0].$input[1].$input[1].$input[2].$input[2]; |
|
74
|
|
|
} |
|
75
|
|
|
return $input; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
/** |
|
79
|
|
|
* Color delta algorithm |
|
80
|
|
|
* |
|
81
|
|
|
* @param float $rgb The R, G, or B value |
|
82
|
|
|
* @param float $max The max RGB value |
|
83
|
|
|
* @param float $delta The delta value ($max - $min) |
|
84
|
|
|
* @return float The color delta |
|
85
|
|
|
*/ |
|
86
|
|
|
protected static function _rgbhsl_delta_rgb(float $rgb, float $max, float $delta) { |
|
87
|
|
|
return ((($max - $rgb) / 6) + ($delta / 2)) / $delta; |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* Calculate the hue as a percentage from RGB |
|
92
|
|
|
* |
|
93
|
|
|
* @param float &$h The variable to modify as hue |
|
94
|
|
|
* @param float $r The red value as a percentage |
|
95
|
|
|
* @param float $g The green value as a percentage |
|
96
|
|
|
* @param float $b The blue value as a percentage |
|
97
|
|
|
* @param float $max The max RGB value |
|
98
|
|
|
* @param float $delta The delta value ($max - $min) |
|
99
|
|
|
* @return void |
|
100
|
|
|
*/ |
|
101
|
|
|
protected static function _rgbhsl_hue(float &$h, float $r, float $g, float $b, float $max, float $delta) { |
|
102
|
|
|
$delta_r = static::_rgbhsl_delta_rgb($r, $max, $delta); |
|
103
|
|
|
$delta_g = static::_rgbhsl_delta_rgb($g, $max, $delta); |
|
104
|
|
|
$delta_b = static::_rgbhsl_delta_rgb($b, $max, $delta); |
|
105
|
|
|
|
|
106
|
|
|
$h = (2 / 3) + $delta_g - $delta_r; |
|
107
|
|
|
if ($r == $max) { |
|
108
|
|
|
$h = $delta_b - $delta_g; |
|
109
|
|
|
} elseif ($g == $max) { |
|
110
|
|
|
$h = (1 / 3) + $delta_r - $delta_b; |
|
111
|
|
|
} |
|
112
|
|
|
if ($h < 0) { |
|
113
|
|
|
$h++; |
|
114
|
|
|
} |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
|
|
/** |
|
118
|
|
|
* Handle low hue values |
|
119
|
|
|
* |
|
120
|
|
|
* @param float &$r The red value to modify |
|
121
|
|
|
* @param float &$g The green value to modify |
|
122
|
|
|
* @param float &$b The blue value to modify |
|
123
|
|
|
* @param float $c Potential R, G, or B value |
|
124
|
|
|
* @param float $x Potential R, G, or B value |
|
125
|
|
|
* @param float $h The hue |
|
126
|
|
|
* @return void |
|
127
|
|
|
*/ |
|
128
|
|
|
protected static function _hslrgb_low(float &$r, float &$g, float &$b, float $c, float $x, float $h) { |
|
129
|
|
|
if ($h < 60) { |
|
130
|
|
|
$r = $c; |
|
131
|
|
|
$g = $x; |
|
132
|
|
|
$b = 0; |
|
133
|
|
|
} elseif ($h < 120) { |
|
134
|
|
|
$r = $x; |
|
135
|
|
|
$g = $c; |
|
136
|
|
|
$b = 0; |
|
137
|
|
|
} else { |
|
138
|
|
|
$r = 0; |
|
139
|
|
|
$g = $c; |
|
140
|
|
|
$b = $x; |
|
141
|
|
|
} |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* Handle high hue values |
|
146
|
|
|
* |
|
147
|
|
|
* @param float &$r The red value to modify |
|
148
|
|
|
* @param float &$g The green value to modify |
|
149
|
|
|
* @param float &$b The blue value to modify |
|
150
|
|
|
* @param float $c Potential R, G, or B value |
|
151
|
|
|
* @param float $x Potential R, G, or B value |
|
152
|
|
|
* @param float $h The hue |
|
153
|
|
|
* @return void |
|
154
|
|
|
*/ |
|
155
|
|
|
protected static function _hslrgb_high(float &$r, float &$g, float &$b, float $c, float $x, float $h) { |
|
156
|
|
|
if ($h < 240) { |
|
157
|
|
|
$r = 0; |
|
158
|
|
|
$g = $x; |
|
159
|
|
|
$b = $c; |
|
160
|
|
|
} else { |
|
161
|
|
|
$r = $x; |
|
162
|
|
|
$g = 0; |
|
163
|
|
|
$b = $c; |
|
164
|
|
|
} |
|
165
|
|
|
} |
|
166
|
|
|
} |
|
167
|
|
|
|
ProjectCleverWeb /
PHP-Color
Loading history...
Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a
@returnannotation as described here.