vendor/mpdf/mpdf/src/Gradient.php

   1 <?php
   2
   3 namespace Mpdf;
   4
   5 use Mpdf\Color\ColorConverter;
   6
   7 class Gradient
   8 {
   9         const TYPE_LINEAR = 2;
  10         const TYPE_RADIAL = 3;
  11
  12         /**
  13          * @var \Mpdf\Mpdf
  14          */
  15         private $mpdf;
  16
  17         /**
  18          * @var \Mpdf\SizeConverter
  19          */
  20         private $sizeConverter;
  21
  22         /**
  23          * @var \Mpdf\Color\ColorConverter
  24          */
  25         private $colorConverter;
  26
  27         public function __construct(Mpdf $mpdf, SizeConverter $sizeConverter, ColorConverter $colorConverter)
  28         {
  29                 $this->mpdf = $mpdf;
  30                 $this->sizeConverter = $sizeConverter;
  31                 $this->colorConverter = $colorConverter;
  32         }
  33
  34         // mPDF 5.3.A1
  35         public function CoonsPatchMesh($x, $y, $w, $h, $patch_array = [], $x_min = 0, $x_max = 1, $y_min = 0, $y_max = 1, $colspace = 'RGB', $return = false)
  36         {
  37                 $s = ' q ';
  38                 $s.=sprintf(' %.3F %.3F %.3F %.3F re W n ', $x * Mpdf::SCALE, ($this->mpdf->h - $y) * Mpdf::SCALE, $w * Mpdf::SCALE, -$h * Mpdf::SCALE);
  39                 $s.=sprintf(' %.3F 0 0 %.3F %.3F %.3F cm ', $w * Mpdf::SCALE, $h * Mpdf::SCALE, $x * Mpdf::SCALE, ($this->mpdf->h - ($y + $h)) * Mpdf::SCALE);
  40                 $n = count($this->mpdf->gradients) + 1;
  41                 $this->mpdf->gradients[$n]['type'] = 6; //coons patch mesh
  42                 $this->mpdf->gradients[$n]['colorspace'] = $colspace; //coons patch mesh
  43                 $bpcd = 65535; //16 BitsPerCoordinate
  44                 $trans = false;
  45                 $this->mpdf->gradients[$n]['stream'] = '';
  46                 for ($i = 0; $i < count($patch_array); $i++) {
  47                         $this->mpdf->gradients[$n]['stream'].=chr($patch_array[$i]['f']); //start with the edge flag as 8 bit
  48                         for ($j = 0; $j < count($patch_array[$i]['points']); $j++) {
  49                                 //each point as 16 bit
  50                                 if (($j % 2) == 1) { // Y coordinate (adjusted as input is From top left)
  51                                         $patch_array[$i]['points'][$j] = (($patch_array[$i]['points'][$j] - $y_min) / ($y_max - $y_min)) * $bpcd;
  52                                         $patch_array[$i]['points'][$j] = $bpcd - $patch_array[$i]['points'][$j];
  53                                 } else {
  54                                         $patch_array[$i]['points'][$j] = (($patch_array[$i]['points'][$j] - $x_min) / ($x_max - $x_min)) * $bpcd;
  55                                 }
  56                                 if ($patch_array[$i]['points'][$j] < 0) {
  57                                         $patch_array[$i]['points'][$j] = 0;
  58                                 }
  59                                 if ($patch_array[$i]['points'][$j] > $bpcd) {
  60                                         $patch_array[$i]['points'][$j] = $bpcd;
  61                                 }
  62                                 $this->mpdf->gradients[$n]['stream'].=chr(floor($patch_array[$i]['points'][$j] / 256));
  63                                 $this->mpdf->gradients[$n]['stream'].=chr(floor($patch_array[$i]['points'][$j] % 256));
  64                         }
  65                         for ($j = 0; $j < count($patch_array[$i]['colors']); $j++) {
  66                                 //each color component as 8 bit
  67                                 if ($colspace === 'RGB') {
  68                                         $this->mpdf->gradients[$n]['stream'].= $patch_array[$i]['colors'][$j][1];
  69                                         $this->mpdf->gradients[$n]['stream'].= $patch_array[$i]['colors'][$j][2];
  70                                         $this->mpdf->gradients[$n]['stream'].= $patch_array[$i]['colors'][$j][3];
  71                                         if (isset($patch_array[$i]['colors'][$j][4]) && ord($patch_array[$i]['colors'][$j][4]) < 100) {
  72                                                 $trans = true;
  73                                         }
  74                                 } elseif ($colspace === 'CMYK') {
  75                                         $this->mpdf->gradients[$n]['stream'].=chr(ord($patch_array[$i]['colors'][$j][1]) * 2.55);
  76                                         $this->mpdf->gradients[$n]['stream'].=chr(ord($patch_array[$i]['colors'][$j][2]) * 2.55);
  77                                         $this->mpdf->gradients[$n]['stream'].=chr(ord($patch_array[$i]['colors'][$j][3]) * 2.55);
  78                                         $this->mpdf->gradients[$n]['stream'].=chr(ord($patch_array[$i]['colors'][$j][4]) * 2.55);
  79                                         if (isset($patch_array[$i]['colors'][$j][5]) && ord($patch_array[$i]['colors'][$j][5]) < 100) {
  80                                                 $trans = true;
  81                                         }
  82                                 } elseif ($colspace === 'Gray') {
  83                                         $this->mpdf->gradients[$n]['stream'].= $patch_array[$i]['colors'][$j][1];
  84                                         if ($patch_array[$i]['colors'][$j][2] == 1) {
  85                                                 $trans = true;
  86                                         } // transparency converted from rgba or cmyka()
  87                                 }
  88                         }
  89                 }
  90                 // TRANSPARENCY
  91                 if ($trans) {
  92                         $this->mpdf->gradients[$n]['stream_trans'] = '';
  93                         for ($i = 0; $i < count($patch_array); $i++) {
  94                                 $this->mpdf->gradients[$n]['stream_trans'].=chr($patch_array[$i]['f']);
  95                                 for ($j = 0; $j < count($patch_array[$i]['points']); $j++) {
  96                                         //each point as 16 bit
  97                                         $this->mpdf->gradients[$n]['stream_trans'].=chr(floor($patch_array[$i]['points'][$j] / 256));
  98                                         $this->mpdf->gradients[$n]['stream_trans'].=chr(floor($patch_array[$i]['points'][$j] % 256));
  99                                 }
 100                                 for ($j = 0; $j < count($patch_array[$i]['colors']); $j++) {
 101                                         //each color component as 8 bit // OPACITY
 102                                         if ($colspace === 'RGB') {
 103                                                 $this->mpdf->gradients[$n]['stream_trans'].=chr((int) (ord($patch_array[$i]['colors'][$j][4]) * 2.55));
 104                                         } elseif ($colspace === 'CMYK') {
 105                                                 $this->mpdf->gradients[$n]['stream_trans'].=chr((int) (ord($patch_array[$i]['colors'][$j][5]) * 2.55));
 106                                         } elseif ($colspace === 'Gray') {
 107                                                 $this->mpdf->gradients[$n]['stream_trans'].=chr((int) (ord($patch_array[$i]['colors'][$j][3]) * 2.55));
 108                                         }
 109                                 }
 110                         }
 111                         $this->mpdf->gradients[$n]['trans'] = true;
 112                         $s .= ' /TGS' . $n . ' gs ';
 113                 }
 114                 //paint the gradient
 115                 $s .= '/Sh' . $n . ' sh' . "\n";
 116                 //restore previous Graphic State
 117                 $s .= 'Q' . "\n";
 118                 if ($return) {
 119                         return $s;
 120                 }
 121
 122                 $this->mpdf->_out($s);
 123         }
 124
 125         // type = linear:2; radial: 3;
 126         // Linear: $coords - array of the form (x1, y1, x2, y2) which defines the gradient vector (see linear_gradient_coords.jpg).
 127         //    The default value is from left to right (x1=0, y1=0, x2=1, y2=0).
 128         // Radial: $coords - array of the form (fx, fy, cx, cy, r) where (fx, fy) is the starting point of the gradient with color1,
 129         //    (cx, cy) is the center of the circle with color2, and r is the radius of the circle (see radial_gradient_coords.jpg).
 130         //    (fx, fy) should be inside the circle, otherwise some areas will not be defined
 131         // $col = array(R,G,B/255); or array(G/255); or array(C,M,Y,K/100)
 132         // $stops = array('col'=>$col [, 'opacity'=>0-1] [, 'offset'=>0-1])
 133         public function Gradient($x, $y, $w, $h, $type, $stops = [], $colorspace = 'RGB', $coords = '', $extend = '', $return = false, $is_mask = false)
 134         {
 135                 if (stripos($type, 'L') === 0) {
 136                         $type = self::TYPE_LINEAR;
 137                 } elseif (stripos($type, 'R') === 0) {
 138                         $type = self::TYPE_RADIAL;
 139                 }
 140
 141                 if ($colorspace !== 'CMYK' && $colorspace !== 'Gray') {
 142                         $colorspace = 'RGB';
 143                 }
 144                 $bboxw = $w;
 145                 $bboxh = $h;
 146                 $usex = $x;
 147                 $usey = $y;
 148                 $usew = $bboxw;
 149                 $useh = $bboxh;
 150
 151                 if ($type < 1) {
 152                         $type = self::TYPE_LINEAR;
 153                 }
 154                 if ($coords[0] !== false && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $coords[0], $m)) {
 155                         $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 156                         if ($tmp) {
 157                                 $coords[0] = $tmp / $w;
 158                         }
 159                 }
 160                 if ($coords[1] !== false && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $coords[1], $m)) {
 161                         $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 162                         if ($tmp) {
 163                                 $coords[1] = 1 - ($tmp / $h);
 164                         }
 165                 }
 166
 167                 if ($type == self::TYPE_LINEAR) {
 168                         $angle = (isset($coords[4]) ? $coords[4] : false);
 169                         $repeat = (isset($coords[5]) ? $coords[5] : false);
 170                         // ALL POINTS SET (default for custom mPDF linear gradient) - no -moz
 171                         if ($coords[0] !== false && $coords[1] !== false && $coords[2] !== false && $coords[3] !== false) {
 172                                 // do nothing - coords used as they are
 173                         } elseif ($angle !== false && $coords[0] !== false && $coords[1] !== false && $coords[2] === false && $coords[3] === false) {
 174                                 // If both a <point> and <angle> are defined, the gradient axis starts from the point and runs along the angle. The end point is
 175                                 // defined as before - in this case start points may not be in corners, and axis may not correctly fall in the right quadrant.
 176                                 // NO end points (Angle defined & Start points)
 177                                 if ($angle == 0 || $angle == 360) {
 178                                         $coords[3] = $coords[1];
 179                                         if ($coords[0] == 1) {
 180                                                 $coords[2] = 2;
 181                                         } else {
 182                                                 $coords[2] = 1;
 183                                         }
 184                                 } elseif ($angle == 90) {
 185                                         $coords[2] = $coords[0];
 186                                         $coords[3] = 1;
 187                                         if ($coords[1] == 1) {
 188                                                 $coords[3] = 2;
 189                                         } else {
 190                                                 $coords[3] = 1;
 191                                         }
 192                                 } elseif ($angle == 180) {
 193                                         if ($coords[4] == 0) {
 194                                                 $coords[2] = -1;
 195                                         } else {
 196                                                 $coords[2] = 0;
 197                                         }
 198                                         $coords[3] = $coords[1];
 199                                 } elseif ($angle == 270) {
 200                                         $coords[2] = $coords[0];
 201                                         if ($coords[1] == 0) {
 202                                                 $coords[3] = -1;
 203                                         } else {
 204                                                 $coords[3] = 0;
 205                                         }
 206                                 } else {
 207                                         $endx = 1;
 208                                         $endy = 1;
 209                                         if ($angle <= 90) {
 210                                                 if ($angle <= 45) {
 211                                                         $endy = tan(deg2rad($angle));
 212                                                 } else {
 213                                                         $endx = tan(deg2rad(90 - $angle));
 214                                                 }
 215                                                 $b = atan2($endy * $bboxh, $endx * $bboxw);
 216                                                 $ny = 1 - $coords[1] - (tan($b) * (1 - $coords[0]));
 217                                                 $tx = sin($b) * cos($b) * $ny;
 218                                                 $ty = cos($b) * cos($b) * $ny;
 219                                                 $coords[2] = 1 + $tx;
 220                                                 $coords[3] = 1 - $ty;
 221                                         } elseif ($angle <= 180) {
 222                                                 if ($angle <= 135) {
 223                                                         $endx = tan(deg2rad($angle - 90));
 224                                                 } else {
 225                                                         $endy = tan(deg2rad(180 - $angle));
 226                                                 }
 227                                                 $b = atan2($endy * $bboxh, $endx * $bboxw);
 228                                                 $ny = 1 - $coords[1] - (tan($b) * $coords[0]);
 229                                                 $tx = sin($b) * cos($b) * $ny;
 230                                                 $ty = cos($b) * cos($b) * $ny;
 231                                                 $coords[2] = -$tx;
 232                                                 $coords[3] = 1 - $ty;
 233                                         } elseif ($angle <= 270) {
 234                                                 if ($angle <= 225) {
 235                                                         $endy = tan(deg2rad($angle - 180));
 236                                                 } else {
 237                                                         $endx = tan(deg2rad(270 - $angle));
 238                                                 }
 239                                                 $b = atan2($endy * $bboxh, $endx * $bboxw);
 240                                                 $ny = $coords[1] - (tan($b) * $coords[0]);
 241                                                 $tx = sin($b) * cos($b) * $ny;
 242                                                 $ty = cos($b) * cos($b) * $ny;
 243                                                 $coords[2] = -$tx;
 244                                                 $coords[3] = $ty;
 245                                         } else {
 246                                                 if ($angle <= 315) {
 247                                                         $endx = tan(deg2rad($angle - 270));
 248                                                 } else {
 249                                                         $endy = tan(deg2rad(360 - $angle));
 250                                                 }
 251                                                 $b = atan2($endy * $bboxh, $endx * $bboxw);
 252                                                 $ny = $coords[1] - (tan($b) * (1 - $coords[0]));
 253                                                 $tx = sin($b) * cos($b) * $ny;
 254                                                 $ty = cos($b) * cos($b) * $ny;
 255                                                 $coords[2] = 1 + $tx;
 256                                                 $coords[3] = $ty;
 257                                         }
 258                                 }
 259                         } elseif ($angle !== false && $coords[0] === false && $coords[1] === false) {
 260                                 // -moz If the first parameter is only an <angle>, the gradient axis starts from the box's corner that would ensure the
 261                                 // axis goes through the box. The axis runs along the specified angle. The end point of the axis is defined such that the
 262                                 // farthest corner of the box from the starting point is perpendicular to the gradient axis at that point.
 263                                 // NO end points or Start points (Angle defined)
 264                                 if ($angle == 0 || $angle == 360) {
 265                                         $coords[0] = 0;
 266                                         $coords[1] = 0;
 267                                         $coords[2] = 1;
 268                                         $coords[3] = 0;
 269                                 } elseif ($angle == 90) {
 270                                         $coords[0] = 0;
 271                                         $coords[1] = 0;
 272                                         $coords[2] = 0;
 273                                         $coords[3] = 1;
 274                                 } elseif ($angle == 180) {
 275                                         $coords[0] = 1;
 276                                         $coords[1] = 0;
 277                                         $coords[2] = 0;
 278                                         $coords[3] = 0;
 279                                 } elseif ($angle == 270) {
 280                                         $coords[0] = 0;
 281                                         $coords[1] = 1;
 282                                         $coords[2] = 0;
 283                                         $coords[3] = 0;
 284                                 } else {
 285                                         if ($angle <= 90) {
 286                                                 $coords[0] = 0;
 287                                                 $coords[1] = 0;
 288                                                 if ($angle <= 45) {
 289                                                         $endx = 1;
 290                                                         $endy = tan(deg2rad($angle));
 291                                                 } else {
 292                                                         $endx = tan(deg2rad(90 - $angle));
 293                                                         $endy = 1;
 294                                                 }
 295                                         } elseif ($angle <= 180) {
 296                                                 $coords[0] = 1;
 297                                                 $coords[1] = 0;
 298                                                 if ($angle <= 135) {
 299                                                         $endx = tan(deg2rad($angle - 90));
 300                                                         $endy = 1;
 301                                                 } else {
 302                                                         $endx = 1;
 303                                                         $endy = tan(deg2rad(180 - $angle));
 304                                                 }
 305                                         } elseif ($angle <= 270) {
 306                                                 $coords[0] = 1;
 307                                                 $coords[1] = 1;
 308                                                 if ($angle <= 225) {
 309                                                         $endx = 1;
 310                                                         $endy = tan(deg2rad($angle - 180));
 311                                                 } else {
 312                                                         $endx = tan(deg2rad(270 - $angle));
 313                                                         $endy = 1;
 314                                                 }
 315                                         } else {
 316                                                 $coords[0] = 0;
 317                                                 $coords[1] = 1;
 318                                                 if ($angle <= 315) {
 319                                                         $endx = tan(deg2rad($angle - 270));
 320                                                         $endy = 1;
 321                                                 } else {
 322                                                         $endx = 1;
 323                                                         $endy = tan(deg2rad(360 - $angle));
 324                                                 }
 325                                         }
 326                                         $b = atan2($endy * $bboxh, $endx * $bboxw);
 327                                         $h2 = $bboxh - ($bboxh * tan($b));
 328                                         $px = $bboxh + ($h2 * sin($b) * cos($b));
 329                                         $py = ($bboxh * tan($b)) + ($h2 * sin($b) * sin($b));
 330                                         $x1 = $px / $bboxh;
 331                                         $y1 = $py / $bboxh;
 332                                         if ($angle <= 90) {
 333                                                 $coords[2] = $x1;
 334                                                 $coords[3] = $y1;
 335                                         } elseif ($angle <= 180) {
 336                                                 $coords[2] = 1 - $x1;
 337                                                 $coords[3] = $y1;
 338                                         } elseif ($angle <= 270) {
 339                                                 $coords[2] = 1 - $x1;
 340                                                 $coords[3] = 1 - $y1;
 341                                         } else {
 342                                                 $coords[2] = $x1;
 343                                                 $coords[3] = 1 - $y1;
 344                                         }
 345                                 }
 346                         } elseif ((!isset($angle) || $angle === false) && $coords[0] !== false && $coords[1] !== false) {
 347                                 // -moz If the first parameter to the gradient function is only a <point>, the gradient axis starts from the specified point,
 348                                 // and ends at the point you would get if you rotated the starting point by 180 degrees about the center of the box that the
 349                                 // gradient is to be applied to.
 350                                 // NO angle and NO end points (Start points defined)
 351                                 $coords[2] = 1 - $coords[0];
 352                                 $coords[3] = 1 - $coords[1];
 353                                 $angle = rad2deg(atan2($coords[3] - $coords[1], $coords[2] - $coords[0]));
 354                                 if ($angle < 0) {
 355                                         $angle += 360;
 356                                 } elseif ($angle > 360) {
 357                                         $angle -= 360;
 358                                 }
 359                                 if ($angle != 0 && $angle != 360 && $angle != 90 && $angle != 180 && $angle != 270) {
 360                                         if ($w >= $h) {
 361                                                 $coords[1] *= $h / $w;
 362                                                 $coords[3] *= $h / $w;
 363                                                 $usew = $useh = $bboxw;
 364                                                 $usey -= ($w - $h);
 365                                         } else {
 366                                                 $coords[0] *= $w / $h;
 367                                                 $coords[2] *= $w / $h;
 368                                                 $usew = $useh = $bboxh;
 369                                         }
 370                                 }
 371                         } else {
 372                                 // default values T2B
 373                                 // -moz If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values, the gradient
 374                                 // axis starts from the top of the box and runs vertically downwards, ending at the bottom of the box.
 375                                 // All values are set in parseMozGradient - so won't appear here
 376                                 $coords = [0, 0, 1, 0]; // default for original linear gradient (L2R)
 377                         }
 378                 } elseif ($type == self::TYPE_RADIAL) {
 379                         $radius = (isset($coords[4]) ? $coords[4] : false);
 380                         $shape = (isset($coords[6]) ? $coords[6] : false);
 381                         $size = (isset($coords[7]) ? $coords[7] : false);
 382                         $repeat = (isset($coords[8]) ? $coords[8] : false);
 383                         // ALL POINTS AND RADIUS SET (default for custom mPDF radial gradient) - no -moz
 384                         if ($coords[0] !== false && $coords[1] !== false && $coords[2] !== false && $coords[3] !== false && $coords[4] !== false) {
 385                                 // If a <point> is defined
 386                                 // do nothing - coords used as they are
 387                         } elseif ($shape !== false && $size !== false) {
 388                                 if ($coords[2] == false) {
 389                                         $coords[2] = $coords[0];
 390                                 }
 391                                 if ($coords[3] == false) {
 392                                         $coords[3] = $coords[1];
 393                                 }
 394                                 // ELLIPSE
 395                                 if ($shape === 'ellipse') {
 396                                         $corner1 = sqrt(($coords[0] ** 2) + ($coords[1] ** 2));
 397                                         $corner2 = sqrt(($coords[0] ** 2) + ((1 - $coords[1]) ** 2));
 398                                         $corner3 = sqrt(((1 - $coords[0]) ** 2) + ($coords[1] ** 2));
 399                                         $corner4 = sqrt(((1 - $coords[0]) ** 2) + ((1 - $coords[1]) ** 2));
 400                                         if ($size === 'closest-side') {
 401                                                 $radius = min($coords[0], $coords[1], 1 - $coords[0], 1 - $coords[1]);
 402                                         } elseif ($size === 'closest-corner') {
 403                                                 $radius = min($corner1, $corner2, $corner3, $corner4);
 404                                         } elseif ($size === 'farthest-side') {
 405                                                 $radius = max($coords[0], $coords[1], 1 - $coords[0], 1 - $coords[1]);
 406                                         } else {
 407                                                 $radius = max($corner1, $corner2, $corner3, $corner4);
 408                                         } // farthest corner (default)
 409                                 } elseif ($shape === 'circle') {
 410                                         if ($w >= $h) {
 411                                                 $coords[1] = $coords[3] = ($coords[1] * $h / $w);
 412                                                 $corner1 = sqrt(($coords[0] ** 2) + ($coords[1] ** 2));
 413                                                 $corner2 = sqrt(($coords[0] ** 2) + ((($h / $w) - $coords[1]) ** 2));
 414                                                 $corner3 = sqrt(((1 - $coords[0]) ** 2) + ($coords[1] ** 2));
 415                                                 $corner4 = sqrt(((1 - $coords[0]) ** 2) + ((($h / $w) - $coords[1]) ** 2));
 416                                                 if ($size === 'closest-side') {
 417                                                         $radius = min($coords[0], $coords[1], 1 - $coords[0], ($h / $w) - $coords[1]);
 418                                                 } elseif ($size === 'closest-corner') {
 419                                                         $radius = min($corner1, $corner2, $corner3, $corner4);
 420                                                 } elseif ($size === 'farthest-side') {
 421                                                         $radius = max($coords[0], $coords[1], 1 - $coords[0], ($h / $w) - $coords[1]);
 422                                                 } elseif ($size === 'farthest-corner') {
 423                                                         $radius = max($corner1, $corner2, $corner3, $corner4);
 424                                                 } // farthest corner (default)
 425                                                 $usew = $useh = $bboxw;
 426                                                 $usey -= ($w - $h);
 427                                         } else {
 428                                                 $coords[0] = $coords[2] = ($coords[0] * $w / $h);
 429                                                 $corner1 = sqrt(($coords[0] ** 2) + ($coords[1] ** 2));
 430                                                 $corner2 = sqrt(($coords[0] ** 2) + ((1 - $coords[1]) ** 2));
 431                                                 $corner3 = sqrt(((($w / $h) - $coords[0]) ** 2) + ($coords[1] ** 2));
 432                                                 $corner4 = sqrt(((($w / $h) - $coords[0]) ** 2) + ((1 - $coords[1]) ** 2));
 433                                                 if ($size === 'closest-side') {
 434                                                         $radius = min($coords[0], $coords[1], ($w / $h) - $coords[0], 1 - $coords[1]);
 435                                                 } elseif ($size === 'closest-corner') {
 436                                                         $radius = min($corner1, $corner2, $corner3, $corner4);
 437                                                 } elseif ($size === 'farthest-side') {
 438                                                         $radius = max($coords[0], $coords[1], ($w / $h) - $coords[0], 1 - $coords[1]);
 439                                                 } elseif ($size === 'farthest-corner') {
 440                                                         $radius = max($corner1, $corner2, $corner3, $corner4);
 441                                                 } // farthest corner (default)
 442                                                 $usew = $useh = $bboxh;
 443                                         }
 444                                 }
 445                                 if ($radius == 0) {
 446                                         $radius = 0.001;
 447                                 } // to prevent error
 448                                 $coords[4] = $radius;
 449                         } else {
 450                                 // -moz If entire function consists of only <stop> values
 451                                 // All values are set in parseMozGradient - so won't appear here
 452                                 $coords = [0.5, 0.5, 0.5, 0.5]; // default for radial gradient (centred)
 453                         }
 454                 }
 455                 $s = ' q';
 456                 $s .= sprintf(' %.3F %.3F %.3F %.3F re W n', $x * Mpdf::SCALE, ($this->mpdf->h - $y) * Mpdf::SCALE, $w * Mpdf::SCALE, -$h * Mpdf::SCALE) . "\n";
 457                 $s .= sprintf(' %.3F 0 0 %.3F %.3F %.3F cm', $usew * Mpdf::SCALE, $useh * Mpdf::SCALE, $usex * Mpdf::SCALE, ($this->mpdf->h - ($usey + $useh)) * Mpdf::SCALE) . "\n";
 458
 459                 $n = count($this->mpdf->gradients) + 1;
 460                 $this->mpdf->gradients[$n]['type'] = $type;
 461                 $this->mpdf->gradients[$n]['colorspace'] = $colorspace;
 462                 $trans = false;
 463                 $this->mpdf->gradients[$n]['is_mask'] = $is_mask;
 464                 if ($is_mask) {
 465                         $trans = true;
 466                 }
 467                 if (count($stops) == 1) {
 468                         $stops[1] = $stops[0];
 469                 }
 470                 if (!isset($stops[0]['offset'])) {
 471                         $stops[0]['offset'] = 0;
 472                 }
 473                 if (!isset($stops[count($stops) - 1]['offset'])) {
 474                         $stops[count($stops) - 1]['offset'] = 1;
 475                 }
 476
 477                 // Fix stop-offsets set as absolute lengths
 478                 if ($type == self::TYPE_LINEAR) {
 479                         $axisx = ($coords[2] - $coords[0]) * $usew;
 480                         $axisy = ($coords[3] - $coords[1]) * $useh;
 481                         $axis_length = sqrt(($axisx ** 2) + ($axisy ** 2));
 482                 } else {
 483                         $axis_length = $coords[4] * $usew;
 484                 } // Absolute lengths are meaningless for an ellipse - Firefox uses Width as reference
 485
 486                 for ($i = 0; $i < count($stops); $i++) {
 487                         if (isset($stops[$i]['offset']) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $stops[$i]['offset'], $m)) {
 488                                 $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 489                                 $stops[$i]['offset'] = $tmp / $axis_length;
 490                         }
 491                 }
 492
 493
 494                 if (isset($stops[0]['offset']) && $stops[0]['offset'] > 0) {
 495                         $firststop = $stops[0];
 496                         $firststop['offset'] = 0;
 497                         array_unshift($stops, $firststop);
 498                 }
 499                 if (!$repeat && isset($stops[count($stops) - 1]['offset']) && $stops[count($stops) - 1]['offset'] < 1) {
 500                         $endstop = $stops[count($stops) - 1];
 501                         $endstop['offset'] = 1;
 502                         $stops[] = $endstop;
 503                 }
 504                 if ($stops[0]['offset'] > $stops[count($stops) - 1]['offset']) {
 505                         $stops[0]['offset'] = 0;
 506                         $stops[count($stops) - 1]['offset'] = 1;
 507                 }
 508
 509                 for ($i = 0; $i < count($stops); $i++) {
 510                         // mPDF 5.3.74
 511                         if ($colorspace === 'CMYK') {
 512                                 $this->mpdf->gradients[$n]['stops'][$i]['col'] = sprintf('%.3F %.3F %.3F %.3F', ord($stops[$i]['col']{1}) / 100, ord($stops[$i]['col']{2}) / 100, ord($stops[$i]['col']{3}) / 100, ord($stops[$i]['col']{4}) / 100);
 513                         } elseif ($colorspace === 'Gray') {
 514                                 $this->mpdf->gradients[$n]['stops'][$i]['col'] = sprintf('%.3F', ord($stops[$i]['col']{1}) / 255);
 515                         } else {
 516                                 $this->mpdf->gradients[$n]['stops'][$i]['col'] = sprintf('%.3F %.3F %.3F', ord($stops[$i]['col']{1}) / 255, ord($stops[$i]['col']{2}) / 255, ord($stops[$i]['col']{3}) / 255);
 517                         }
 518                         if (!isset($stops[$i]['opacity'])) {
 519                                 $stops[$i]['opacity'] = 1;
 520                         } elseif ($stops[$i]['opacity'] > 1 || $stops[$i]['opacity'] < 0) {
 521                                 $stops[$i]['opacity'] = 1;
 522                         } elseif ($stops[$i]['opacity'] < 1) {
 523                                 $trans = true;
 524                         }
 525                         $this->mpdf->gradients[$n]['stops'][$i]['opacity'] = $stops[$i]['opacity'];
 526                         // OFFSET
 527                         if ($i > 0 && $i < (count($stops) - 1)) {
 528                                 if (!isset($stops[$i]['offset']) || (isset($stops[$i + 1]['offset']) && $stops[$i]['offset'] > $stops[$i + 1]['offset']) || $stops[$i]['offset'] < $stops[$i - 1]['offset']) {
 529                                         if (isset($stops[$i - 1]['offset']) && isset($stops[$i + 1]['offset'])) {
 530                                                 $stops[$i]['offset'] = ($stops[$i - 1]['offset'] + $stops[$i + 1]['offset']) / 2;
 531                                         } else {
 532                                                 for ($j = ($i + 1); $j < count($stops); $j++) {
 533                                                         if (isset($stops[$j]['offset'])) {
 534                                                                 break;
 535                                                         }
 536                                                 }
 537                                                 $int = ($stops[$j]['offset'] - $stops[$i - 1]['offset']) / ($j - $i + 1);
 538                                                 for ($f = 0; $f < ($j - $i - 1); $f++) {
 539                                                         $stops[$i + $f]['offset'] = $stops[$i + $f - 1]['offset'] + $int;
 540                                                 }
 541                                         }
 542                                 }
 543                         }
 544                         $this->mpdf->gradients[$n]['stops'][$i]['offset'] = $stops[$i]['offset'];
 545                 }
 546
 547                 if ($repeat) {
 548                         $ns = count($this->mpdf->gradients[$n]['stops']);
 549                         $offs = [];
 550                         for ($i = 0; $i < $ns; $i++) {
 551                                 $offs[$i] = $this->mpdf->gradients[$n]['stops'][$i]['offset'];
 552                         }
 553                         $gp = 0;
 554                         $inside = true;
 555                         while ($inside) {
 556                                 $gp++;
 557                                 for ($i = 0; $i < $ns; $i++) {
 558                                         $this->mpdf->gradients[$n]['stops'][($ns * $gp) + $i] = $this->mpdf->gradients[$n]['stops'][($ns * ($gp - 1)) + $i];
 559                                         $tmp = $this->mpdf->gradients[$n]['stops'][($ns * ($gp - 1)) + ($ns - 1)]['offset'] + $offs[$i];
 560                                         if ($tmp < 1) {
 561                                                 $this->mpdf->gradients[$n]['stops'][($ns * $gp) + $i]['offset'] = $tmp;
 562                                         } else {
 563                                                 $this->mpdf->gradients[$n]['stops'][($ns * $gp) + $i]['offset'] = 1;
 564                                                 $inside = false;
 565                                                 break;
 566                                         }
 567                                 }
 568                         }
 569                 }
 570
 571                 if ($trans) {
 572                         $this->mpdf->gradients[$n]['trans'] = true;
 573                         $s .= ' /TGS' . $n . ' gs ';
 574                 }
 575                 if (!is_array($extend) || count($extend) < 1) {
 576                         $extend = ['true', 'true']; // These are supposed to be quoted - appear in PDF file as text
 577                 }
 578                 $this->mpdf->gradients[$n]['coords'] = $coords;
 579                 $this->mpdf->gradients[$n]['extend'] = $extend;
 580                 //paint the gradient
 581                 $s .= '/Sh' . $n . ' sh ' . "\n";
 582                 //restore previous Graphic State
 583                 $s .= ' Q ' . "\n";
 584                 if ($return) {
 585                         return $s;
 586                 }
 587
 588                 $this->mpdf->_out($s);
 589         }
 590
 591         private function parseMozLinearGradient($m, $repeat)
 592         {
 593                 $g = [];
 594                 $g['type'] = self::TYPE_LINEAR;
 595                 $g['colorspace'] = 'RGB';
 596                 $g['extend'] = ['true', 'true'];
 597                 $v = trim($m[1]);
 598                 // Change commas inside e.g. rgb(x,x,x)
 599                 while (preg_match('/(\([^\)]*?),/', $v)) {
 600                         $v = preg_replace('/(\([^\)]*?),/', '\\1@', $v);
 601                 }
 602                 // Remove spaces inside e.g. rgb(x, x, x)
 603                 while (preg_match('/(\([^\)]*?)[ ]/', $v)) {
 604                         $v = preg_replace('/(\([^\)]*?)[ ]/', '\\1', $v);
 605                 }
 606                 $bgr = preg_split('/\s*,\s*/', $v);
 607                 for ($i = 0; $i < count($bgr); $i++) {
 608                         $bgr[$i] = preg_replace('/@/', ',', $bgr[$i]);
 609                 }
 610                 // Is first part $bgr[0] a valid point/angle?
 611                 $first = preg_split('/\s+/', trim($bgr[0]));
 612                 if (preg_match('/(left|center|right|bottom|top|deg|grad|rad)/i', $bgr[0]) && !preg_match('/(<#|rgb|rgba|hsl|hsla)/i', $bgr[0])) {
 613                         $startStops = 1;
 614                 } elseif (trim($first[count($first) - 1]) === '0') {
 615                         $startStops = 1;
 616                 } else {
 617                         $check = $this->colorConverter->convert($first[0], $this->mpdf->PDFAXwarnings);
 618                         $startStops = 1;
 619                         if ($check) {
 620                                 $startStops = 0;
 621                         }
 622                 }
 623                 // first part a valid point/angle?
 624                 if ($startStops === 1) { // default values
 625                         // [<point> || <angle>,] = [<% em px left center right bottom top> || <deg grad rad 0>,]
 626                         if (preg_match('/([\-]*[0-9\.]+)(deg|grad|rad)/i', $bgr[0], $m)) {
 627                                 $angle = $m[1] + 0;
 628                                 if (strtolower($m[2]) === 'grad') {
 629                                         $angle *= (360 / 400);
 630                                 } elseif (strtolower($m[2]) === 'rad') {
 631                                         $angle = rad2deg($angle);
 632                                 }
 633                                 while ($angle < 0) {
 634                                         $angle += 360;
 635                                 }
 636                                 $angle %= 360;
 637                         } elseif (trim($first[count($first) - 1]) === '0') {
 638                                 $angle = 0;
 639                         }
 640                         if (stripos($bgr[0], 'left') !== false) {
 641                                 $startx = 0;
 642                         } elseif (stripos($bgr[0], 'right') !== false) {
 643                                 $startx = 1;
 644                         }
 645                         if (stripos($bgr[0], 'top') !== false) {
 646                                 $starty = 1;
 647                         } elseif (stripos($bgr[0], 'bottom') !== false) {
 648                                 $starty = 0;
 649                         }
 650                         // Check for %? ?% or %%
 651                         if (preg_match('/(\d+)[%]/i', $first[0], $m)) {
 652                                 $startx = $m[1] / 100;
 653                         } elseif (!isset($startx) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[0], $m)) {
 654                                 $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 655                                 if ($tmp) {
 656                                         $startx = $m[1];
 657                                 }
 658                         }
 659                         if (isset($first[1]) && preg_match('/(\d+)[%]/i', $first[1], $m)) {
 660                                 $starty = 1 - ($m[1] / 100);
 661                         } elseif (!isset($starty) && isset($first[1]) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[1], $m)) {
 662                                 $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 663                                 if ($tmp) {
 664                                         $starty = $m[1];
 665                                 }
 666                         }
 667                         if (isset($startx) && !isset($starty)) {
 668                                 $starty = 0.5;
 669                         }
 670                         if (!isset($startx) && isset($starty)) {
 671                                 $startx = 0.5;
 672                         }
 673                 } else {
 674                         // If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values,
 675                         // the gradient axis starts from the top of the box and runs vertically downwards, ending at the bottom of
 676                         // the box.
 677                         $starty = 1;
 678                         $startx = 0.5;
 679                         $endy = 0;
 680                         $endx = 0.5;
 681                 }
 682                 if (!isset($startx)) {
 683                         $startx = false;
 684                 }
 685                 if (!isset($starty)) {
 686                         $starty = false;
 687                 }
 688                 if (!isset($endx)) {
 689                         $endx = false;
 690                 }
 691                 if (!isset($endy)) {
 692                         $endy = false;
 693                 }
 694                 if (!isset($angle)) {
 695                         $angle = false;
 696                 }
 697                 $g['coords'] = [$startx, $starty, $endx, $endy, $angle, $repeat];
 698                 $g['stops'] = [];
 699                 for ($i = $startStops; $i < count($bgr); $i++) {
 700                         // parse stops
 701                         $el = preg_split('/\s+/', trim($bgr[$i]));
 702                         // mPDF 5.3.74
 703                         $col = $this->colorConverter->convert($el[0], $this->mpdf->PDFAXwarnings);
 704                         if (!$col) {
 705                                 $col = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
 706                         }
 707                         if ($col{0} == 1) {
 708                                 $g['colorspace'] = 'Gray';
 709                         } elseif ($col{0} == 4 || $col{0} == 6) {
 710                                 $g['colorspace'] = 'CMYK';
 711                         }
 712
 713                         $g['stops'][] = $this->getStop($col, $el, true);
 714                 }
 715                 return $g;
 716         }
 717
 718         private function parseMozRadialGradient($m, $repeat)
 719         {
 720                 $g = [];
 721                 $g['type'] = self::TYPE_RADIAL;
 722                 $g['colorspace'] = 'RGB';
 723                 $g['extend'] = ['true', 'true'];
 724                 $v = trim($m[1]);
 725                 // Change commas inside e.g. rgb(x,x,x)
 726                 while (preg_match('/(\([^\)]*?),/', $v)) {
 727                         $v = preg_replace('/(\([^\)]*?),/', '\\1@', $v);
 728                 }
 729                 // Remove spaces inside e.g. rgb(x, x, x)
 730                 while (preg_match('/(\([^\)]*?)[ ]/', $v)) {
 731                         $v = preg_replace('/(\([^\)]*?)[ ]/', '\\1', $v);
 732                 }
 733                 $bgr = preg_split('/\s*,\s*/', $v);
 734                 for ($i = 0; $i < count($bgr); $i++) {
 735                         $bgr[$i] = preg_replace('/@/', ',', $bgr[$i]);
 736                 }
 737
 738                 // Is first part $bgr[0] a valid point/angle?
 739                 $startStops = 0;
 740                 $pos_angle = false;
 741                 $shape_size = false;
 742                 $first = preg_split('/\s+/', trim($bgr[0]));
 743                 $checkCol = $this->colorConverter->convert($first[0], $this->mpdf->PDFAXwarnings);
 744                 if (preg_match('/(left|center|right|bottom|top|deg|grad|rad)/i', $bgr[0]) && !preg_match('/(<#|rgb|rgba|hsl|hsla)/i', $bgr[0])) {
 745                         $startStops = 1;
 746                         $pos_angle = $bgr[0];
 747                 } elseif (trim($first[count($first) - 1]) === '0') {
 748                         $startStops = 1;
 749                         $pos_angle = $bgr[0];
 750                 } elseif (preg_match('/(circle|ellipse|closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $bgr[0])) {
 751                         $startStops = 1;
 752                         $shape_size = $bgr[0];
 753                 } elseif (!$checkCol) {
 754                         $startStops = 1;
 755                         $pos_angle = $bgr[0];
 756                 }
 757                 if (preg_match('/(circle|ellipse|closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $bgr[1])) {
 758                         $startStops = 2;
 759                         $shape_size = $bgr[1];
 760                 }
 761
 762                 // If valid point/angle?
 763                 if ($pos_angle) { // default values
 764                         // [<point> || <angle>,] = [<% em px left center right bottom top> || <deg grad rad 0>,]
 765                         if (stripos($pos_angle, 'left') !== false) {
 766                                 $startx = 0;
 767                         } elseif (stripos($pos_angle, 'right') !== false) {
 768                                 $startx = 1;
 769                         }
 770                         if (stripos($pos_angle, 'top') !== false) {
 771                                 $starty = 1;
 772                         } elseif (stripos($pos_angle, 'bottom') !== false) {
 773                                 $starty = 0;
 774                         }
 775                         // Check for %? ?% or %%
 776                         if (preg_match('/(\d+)[%]/i', $first[0], $m)) {
 777                                 $startx = $m[1] / 100;
 778                         } elseif (!isset($startx) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[0], $m)) {
 779                                 $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 780                                 if ($tmp) {
 781                                         $startx = $m[1];
 782                                 }
 783                         }
 784                         if (isset($first[1]) && preg_match('/(\d+)[%]/i', $first[1], $m)) {
 785                                 $starty = 1 - ($m[1] / 100);
 786                         } elseif (!isset($starty) && isset($first[1]) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[1], $m)) {
 787                                 $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 788                                 if ($tmp) {
 789                                         $starty = $m[1];
 790                                 }
 791                         }
 792
 793                         if (!isset($starty)) {
 794                                 $starty = 0.5;
 795                         }
 796                         if (!isset($startx)) {
 797                                 $startx = 0.5;
 798                         }
 799                 } else {
 800                         // If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values,
 801                         // the gradient axis starts from the top of the box and runs vertically downwards, ending at the bottom of
 802                         // the box. default values Center
 803                         $starty = 0.5;
 804                         $startx = 0.5;
 805                         $endy = 0.5;
 806                         $endx = 0.5;
 807                 }
 808
 809                 // If valid shape/size?
 810                 $shape = 'ellipse'; // default
 811                 $size = 'farthest-corner'; // default
 812                 if ($shape_size) { // default values
 813                         if (preg_match('/(circle|ellipse)/i', $shape_size, $m)) {
 814                                 $shape = $m[1];
 815                         }
 816                         if (preg_match('/(closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $shape_size, $m)) {
 817                                 $size = $m[1];
 818                                 if ($size === 'contain') {
 819                                         $size = 'closest-side';
 820                                 } elseif ($size === 'cover') {
 821                                         $size = 'farthest-corner';
 822                                 }
 823                         }
 824                 }
 825
 826                 if (!isset($startx)) {
 827                         $startx = false;
 828                 }
 829                 if (!isset($starty)) {
 830                         $starty = false;
 831                 }
 832                 if (!isset($endx)) {
 833                         $endx = false;
 834                 }
 835                 if (!isset($endy)) {
 836                         $endy = false;
 837                 }
 838                 $radius = false;
 839                 $angle = 0;
 840                 $g['coords'] = [$startx, $starty, $endx, $endy, $radius, $angle, $shape, $size, $repeat];
 841
 842                 $g['stops'] = [];
 843                 for ($i = $startStops; $i < count($bgr); $i++) {
 844                         // parse stops
 845                         $el = preg_split('/\s+/', trim($bgr[$i]));
 846                         // mPDF 5.3.74
 847                         $col = $this->colorConverter->convert($el[0], $this->mpdf->PDFAXwarnings);
 848                         if (!$col) {
 849                                 $col = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
 850                         }
 851                         if ($col{0} == 1) {
 852                                 $g['colorspace'] = 'Gray';
 853                         } elseif ($col{0} == 4 || $col{0} == 6) {
 854                                 $g['colorspace'] = 'CMYK';
 855                         }
 856                         $g['stops'][] = $this->getStop($col, $el);
 857                 }
 858                 return $g;
 859         }
 860
 861         private function getStop($col, $el, $convertOffset = false)
 862         {
 863                 $stop = [
 864                         'col' => $col,
 865                 ];
 866
 867                 if ($col{0} == 5) {
 868                         // transparency from rgba()
 869                         $stop['opacity'] = ord($col{4}) / 100;
 870                 } elseif ($col{0} == 6) {
 871                         // transparency from cmyka()
 872                         $stop['opacity'] = ord($col{5}) / 100;
 873                 } elseif ($col{0} == 1 && $col{2} == 1) {
 874                         // transparency converted from rgba or cmyka()
 875                         $stop['opacity'] = ord($col{3}) / 100;
 876                 }
 877
 878                 if (isset($el[1])) {
 879                         if (preg_match('/(\d+)[%]/', $el[1], $m)) {
 880                                 $stop['offset'] = $m[1] / 100;
 881                                 if ($stop['offset'] > 1) {
 882                                         unset($stop['offset']);
 883                                 }
 884                         } elseif (preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $el[1], $m)) {
 885                                 if ($convertOffset) {
 886                                         $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, false);
 887                                         if ($tmp) {
 888                                                 $stop['offset'] = $m[1];
 889                                         }
 890                                 } else {
 891                                         $stop['offset'] = $el[1];
 892                                 }
 893                         }
 894                 }
 895
 896                 return $stop;
 897         }
 898
 899         public function parseMozGradient($bg)
 900         {
 901                 //      background[-image]: -moz-linear-gradient(left, #c7Fdde 20%, #FF0000 );
 902                 //      background[-image]: linear-gradient(left, #c7Fdde 20%, #FF0000 ); // CSS3
 903                 $repeat = strpos($bg, 'repeating-') !== false;
 904
 905                 if (preg_match('/linear-gradient\((.*)\)/', $bg, $m)) {
 906                         $g = $this->parseMozLinearGradient($m, $repeat);
 907                         if (count($g['stops'])) {
 908                                 return $g;
 909                         }
 910                 } elseif (preg_match('/radial-gradient\((.*)\)/', $bg, $m)) {
 911                         $g = $this->parseMozRadialGradient($m, $repeat);
 912                         if (count($g['stops'])) {
 913                                 return $g;
 914                         }
 915                 }
 916                 return [];
 917         }
 918
 919         public function parseBackgroundGradient($bg)
 920         {
 921                 // background-gradient: linear #00FFFF #FFFF00 0 0.5 1 0.5;  or
 922                 // background-gradient: radial #00FFFF #FFFF00 0.5 0.5 1 1 1.2;
 923
 924                 $v = trim($bg);
 925                 $bgr = preg_split('/\s+/', $v);
 926                 $count_bgr = count($bgr);
 927                 $g = [];
 928                 if ($count_bgr > 6) {
 929                         if (stripos($bgr[0], 'L') === 0 && $count_bgr === 7) {  // linear
 930                                 $g['type'] = self::TYPE_LINEAR;
 931                                 //$coords = array(0,0,1,1 );    // 0 0 1 0 or 0 1 1 1 is L 2 R; 1,1,0,1 is R2L; 1,1,1,0 is T2B; 1,0,1,1 is B2T
 932                                 // Linear: $coords - array of the form (x1, y1, x2, y2) which defines the gradient vector (see linear_gradient_coords.jpg).
 933                                 //    The default value is from left to right (x1=0, y1=0, x2=1, y2=0).
 934                                 $g['coords'] = [$bgr[3], $bgr[4], $bgr[5], $bgr[6]];
 935                         } elseif ($count_bgr === 8) { // radial
 936                                 $g['type'] = self::TYPE_RADIAL;
 937                                 // Radial: $coords - array of the form (fx, fy, cx, cy, r) where (fx, fy) is the starting point of the gradient with color1,
 938                                 //    (cx, cy) is the center of the circle with color2, and r is the radius of the circle (see radial_gradient_coords.jpg).
 939                                 //    (fx, fy) should be inside the circle, otherwise some areas will not be defined
 940                                 $g['coords'] = [$bgr[3], $bgr[4], $bgr[5], $bgr[6], $bgr[7]];
 941                         }
 942                         $g['colorspace'] = 'RGB';
 943                         // mPDF 5.3.74
 944                         $cor = $this->colorConverter->convert($bgr[1], $this->mpdf->PDFAXwarnings);
 945                         if ($cor{0} == 1) {
 946                                 $g['colorspace'] = 'Gray';
 947                         } elseif ($cor{0} == 4 || $cor{0} == 6) {
 948                                 $g['colorspace'] = 'CMYK';
 949                         }
 950                         if ($cor) {
 951                                 $g['col'] = $cor;
 952                         } else {
 953                                 $g['col'] = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
 954                         }
 955                         $cor = $this->colorConverter->convert($bgr[2], $this->mpdf->PDFAXwarnings);
 956                         if ($cor) {
 957                                 $g['col2'] = $cor;
 958                         } else {
 959                                 $g['col2'] = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
 960                         }
 961                         $g['extend'] = ['true', 'true'];
 962                         $g['stops'] = [['col' => $g['col'], 'opacity' => 1, 'offset' => 0], ['col' => $g['col2'], 'opacity' => 1, 'offset' => 1]];
 963                         return $g;
 964                 }
 965                 return false;
 966         }
 967 }