include/colors.php

   1 <?php
   2
   3 function _resolve_htmlcolor($color) {
   4         $htmlcolors = array ("aliceblue" => "#f0f8ff",
   5                 "antiquewhite" => "#faebd7",
   6                 "aqua" => "#00ffff",
   7                 "aquamarine" => "#7fffd4",
   8                 "azure" => "#f0ffff",
   9                 "beige" => "#f5f5dc",
  10                 "bisque" => "#ffe4c4",
  11                 "black" => "#000000",
  12                 "blanchedalmond" => "#ffebcd",
  13                 "blue" => "#0000ff",
  14                 "blueviolet" => "#8a2be2",
  15                 "brown" => "#a52a2a",
  16                 "burlywood" => "#deb887",
  17                 "cadetblue" => "#5f9ea0",
  18                 "chartreuse" => "#7fff00",
  19                 "chocolate" => "#d2691e",
  20                 "coral" => "#ff7f50",
  21                 "cornflowerblue" => "#6495ed",
  22                 "cornsilk" => "#fff8dc",
  23                 "crimson" => "#dc143c",
  24                 "cyan" => "#00ffff",
  25                 "darkblue" => "#00008b",
  26                 "darkcyan" => "#008b8b",
  27                 "darkgoldenrod" => "#b8860b",
  28                 "darkgray" => "#a9a9a9",
  29                 "darkgrey" => "#a9a9a9",
  30                 "darkgreen" => "#006400",
  31                 "darkkhaki" => "#bdb76b",
  32                 "darkmagenta" => "#8b008b",
  33                 "darkolivegreen" => "#556b2f",
  34                 "darkorange" => "#ff8c00",
  35                 "darkorchid" => "#9932cc",
  36                 "darkred" => "#8b0000",
  37                 "darksalmon" => "#e9967a",
  38                 "darkseagreen" => "#8fbc8f",
  39                 "darkslateblue" => "#483d8b",
  40                 "darkslategray" => "#2f4f4f",
  41                 "darkslategrey" => "#2f4f4f",
  42                 "darkturquoise" => "#00ced1",
  43                 "darkviolet" => "#9400d3",
  44                 "deeppink" => "#ff1493",
  45                 "deepskyblue" => "#00bfff",
  46                 "dimgray" => "#696969",
  47                 "dimgrey" => "#696969",
  48                 "dodgerblue" => "#1e90ff",
  49                 "firebrick" => "#b22222",
  50                 "floralwhite" => "#fffaf0",
  51                 "forestgreen" => "#228b22",
  52                 "fuchsia" => "#ff00ff",
  53                 "gainsboro" => "#dcdcdc",
  54                 "ghostwhite" => "#f8f8ff",
  55                 "gold" => "#ffd700",
  56                 "goldenrod" => "#daa520",
  57                 "gray" => "#808080",
  58                 "grey" => "#808080",
  59                 "green" => "#008000",
  60                 "greenyellow" => "#adff2f",
  61                 "honeydew" => "#f0fff0",
  62                 "hotpink" => "#ff69b4",
  63                 "indianred " => "#cd5c5c",
  64                 "indigo " => "#4b0082",
  65                 "ivory" => "#fffff0",
  66                 "khaki" => "#f0e68c",
  67                 "lavender" => "#e6e6fa",
  68                 "lavenderblush" => "#fff0f5",
  69                 "lawngreen" => "#7cfc00",
  70                 "lemonchiffon" => "#fffacd",
  71                 "lightblue" => "#add8e6",
  72                 "lightcoral" => "#f08080",
  73                 "lightcyan" => "#e0ffff",
  74                 "lightgoldenrodyellow" => "#fafad2",
  75                 "lightgray" => "#d3d3d3",
  76                 "lightgrey" => "#d3d3d3",
  77                 "lightgreen" => "#90ee90",
  78                 "lightpink" => "#ffb6c1",
  79                 "lightsalmon" => "#ffa07a",
  80                 "lightseagreen" => "#20b2aa",
  81                 "lightskyblue" => "#87cefa",
  82                 "lightslategray" => "#778899",
  83                 "lightslategrey" => "#778899",
  84                 "lightsteelblue" => "#b0c4de",
  85                 "lightyellow" => "#ffffe0",
  86                 "lime" => "#00ff00",
  87                 "limegreen" => "#32cd32",
  88                 "linen" => "#faf0e6",
  89                 "magenta" => "#ff00ff",
  90                 "maroon" => "#800000",
  91                 "mediumaquamarine" => "#66cdaa",
  92                 "mediumblue" => "#0000cd",
  93                 "mediumorchid" => "#ba55d3",
  94                 "mediumpurple" => "#9370db",
  95                 "mediumseagreen" => "#3cb371",
  96                 "mediumslateblue" => "#7b68ee",
  97                 "mediumspringgreen" => "#00fa9a",
  98                 "mediumturquoise" => "#48d1cc",
  99                 "mediumvioletred" => "#c71585",
 100                 "midnightblue" => "#191970",
 101                 "mintcream" => "#f5fffa",
 102                 "mistyrose" => "#ffe4e1",
 103                 "moccasin" => "#ffe4b5",
 104                 "navajowhite" => "#ffdead",
 105                 "navy" => "#000080",
 106                 "oldlace" => "#fdf5e6",
 107                 "olive" => "#808000",
 108                 "olivedrab" => "#6b8e23",
 109                 "orange" => "#ffa500",
 110                 "orangered" => "#ff4500",
 111                 "orchid" => "#da70d6",
 112                 "palegoldenrod" => "#eee8aa",
 113                 "palegreen" => "#98fb98",
 114                 "paleturquoise" => "#afeeee",
 115                 "palevioletred" => "#db7093",
 116                 "papayawhip" => "#ffefd5",
 117                 "peachpuff" => "#ffdab9",
 118                 "peru" => "#cd853f",
 119                 "pink" => "#ffc0cb",
 120                 "plum" => "#dda0dd",
 121                 "powderblue" => "#b0e0e6",
 122                 "purple" => "#800080",
 123                 "red" => "#ff0000",
 124                 "rosybrown" => "#bc8f8f",
 125                 "royalblue" => "#4169e1",
 126                 "saddlebrown" => "#8b4513",
 127                 "salmon" => "#fa8072",
 128                 "sandybrown" => "#f4a460",
 129                 "seagreen" => "#2e8b57",
 130                 "seashell" => "#fff5ee",
 131                 "sienna" => "#a0522d",
 132                 "silver" => "#c0c0c0",
 133                 "skyblue" => "#87ceeb",
 134                 "slateblue" => "#6a5acd",
 135                 "slategray" => "#708090",
 136                 "slategrey" => "#708090",
 137                 "snow" => "#fffafa",
 138                 "springgreen" => "#00ff7f",
 139                 "steelblue" => "#4682b4",
 140                 "tan" => "#d2b48c",
 141                 "teal" => "#008080",
 142                 "thistle" => "#d8bfd8",
 143                 "tomato" => "#ff6347",
 144                 "turquoise" => "#40e0d0",
 145                 "violet" => "#ee82ee",
 146                 "wheat" => "#f5deb3",
 147                 "white" => "#ffffff",
 148                 "whitesmoke" => "#f5f5f5",
 149                 "yellow" => "#ffff00",
 150                 "yellowgreen" => "#9acd32");
 151
 152         $color = strtolower($color);
 153
 154         if (isset($htmlcolors[$color]))
 155                 return $htmlcolors[$color];
 156         else
 157                 return $color;
 158 }
 159
 160 ### RGB >> HSL
 161 function _color_rgb2hsl($rgb) {
 162   $r = $rgb[0]; $g = $rgb[1]; $b = $rgb[2];
 163   $min = min($r, min($g, $b)); $max = max($r, max($g, $b));
 164   $delta = $max - $min; $l = ($min + $max) / 2; $s = 0;
 165   if ($l > 0 && $l < 1) {
 166     $s = $delta / ($l < 0.5 ? (2 * $l) : (2 - 2 * $l));
 167   }
 168   $h = 0;
 169   if ($delta > 0) {
 170     if ($max == $r && $max != $g) $h += ($g - $b) / $delta;
 171     if ($max == $g && $max != $b) $h += (2 + ($b - $r) / $delta);
 172     if ($max == $b && $max != $r) $h += (4 + ($r - $g) / $delta);
 173     $h /= 6;
 174   } return array($h, $s, $l);
 175 }
 176
 177 ### HSL >> RGB
 178 function _color_hsl2rgb($hsl) {
 179   $h = $hsl[0]; $s = $hsl[1]; $l = $hsl[2];
 180   $m2 = ($l <= 0.5) ? $l * ($s + 1) : $l + $s - $l*$s;
 181   $m1 = $l * 2 - $m2;
 182   return array(_color_hue2rgb($m1, $m2, $h + 0.33333),
 183                _color_hue2rgb($m1, $m2, $h),
 184                _color_hue2rgb($m1, $m2, $h - 0.33333));
 185 }
 186
 187 ### Helper function for _color_hsl2rgb().
 188 function _color_hue2rgb($m1, $m2, $h) {
 189   $h = ($h < 0) ? $h + 1 : (($h > 1) ? $h - 1 : $h);
 190   if ($h * 6 < 1) return $m1 + ($m2 - $m1) * $h * 6;
 191   if ($h * 2 < 1) return $m2;
 192   if ($h * 3 < 2) return $m1 + ($m2 - $m1) * (0.66666 - $h) * 6;
 193   return $m1;
 194 }
 195
 196 ### Convert a hex color into an RGB triplet.
 197 function _color_unpack($hex, $normalize = false) {
 198
 199   if (strpos($hex, '#') !== 0)
 200     $hex = _resolve_htmlcolor($hex);
 201
 202   if (strlen($hex) == 4) {
 203     $hex = $hex[1] . $hex[1] . $hex[2] . $hex[2] . $hex[3] . $hex[3];
 204   } $c = hexdec($hex);
 205   for ($i = 16; $i >= 0; $i -= 8) {
 206     $out[] = (($c >> $i) & 0xFF) / ($normalize ? 255 : 1);
 207   } return $out;
 208 }
 209
 210 ### Convert an RGB triplet to a hex color.
 211 function _color_pack($rgb, $normalize = false) {
 212   foreach ($rgb as $k => $v) {
 213     $out |= (($v * ($normalize ? 255 : 1)) << (16 - $k * 8));
 214   }return '#'. str_pad(dechex($out), 6, 0, STR_PAD_LEFT);
 215 }
 216
 217 function rgb2hsl($arr) {
 218         $r = $arr[0];
 219         $g = $arr[1];
 220         $b = $arr[2];
 221
 222    $var_R = ($r / 255);
 223    $var_G = ($g / 255);
 224    $var_B = ($b / 255);
 225
 226    $var_Min = min($var_R, $var_G, $var_B);
 227    $var_Max = max($var_R, $var_G, $var_B);
 228    $del_Max = $var_Max - $var_Min;
 229
 230    $v = $var_Max;
 231
 232    if ($del_Max == 0) {
 233       $h = 0;
 234       $s = 0;
 235    } else {
 236       $s = $del_Max / $var_Max;
 237
 238       $del_R = ( ( ( $max - $var_R ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
 239       $del_G = ( ( ( $max - $var_G ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
 240       $del_B = ( ( ( $max - $var_B ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
 241
 242       if      ($var_R == $var_Max) $h = $del_B - $del_G;
 243       else if ($var_G == $var_Max) $h = ( 1 / 3 ) + $del_R - $del_B;
 244       else if ($var_B == $var_Max) $h = ( 2 / 3 ) + $del_G - $del_R;
 245
 246       if ($H < 0) $h++;
 247       if ($H > 1) $h--;
 248    }
 249
 250    return array($h, $s, $v);
 251 }
 252
 253 function hsl2rgb($arr) {
 254         $h = $arr[0];
 255         $s = $arr[1];
 256         $v = $arr[2];
 257
 258     if($s == 0) {
 259         $r = $g = $B = $v * 255;
 260     } else {
 261         $var_H = $h * 6;
 262         $var_i = floor( $var_H );
 263         $var_1 = $v * ( 1 - $s );
 264         $var_2 = $v * ( 1 - $s * ( $var_H - $var_i ) );
 265         $var_3 = $v * ( 1 - $s * (1 - ( $var_H - $var_i ) ) );
 266
 267         if       ($var_i == 0) { $var_R = $v     ; $var_G = $var_3  ; $var_B = $var_1 ; }
 268         else if  ($var_i == 1) { $var_R = $var_2 ; $var_G = $v      ; $var_B = $var_1 ; }
 269         else if  ($var_i == 2) { $var_R = $var_1 ; $var_G = $v      ; $var_B = $var_3 ; }
 270         else if  ($var_i == 3) { $var_R = $var_1 ; $var_G = $var_2  ; $var_B = $v     ; }
 271         else if  ($var_i == 4) { $var_R = $var_3 ; $var_G = $var_1  ; $var_B = $v     ; }
 272         else                   { $var_R = $v     ; $var_G = $var_1  ; $var_B = $var_2 ; }
 273
 274         $r = $var_R * 255;
 275         $g = $var_G * 255;
 276         $B = $var_B * 255;
 277     }
 278     return array($r, $g, $B);
 279 }
 280
 281 ?>