<?php

namespace DynamicOOOS\Mpdf;

use DynamicOOOS\Mpdf\Color\ColorConverter;
use DynamicOOOS\Mpdf\Writer\BaseWriter;
class Gradient
{
    const TYPE_LINEAR = 2;
    const TYPE_RADIAL = 3;
    /**
     * @var \Mpdf\Mpdf
     */
    private $mpdf;
    /**
     * @var \Mpdf\SizeConverter
     */
    private $sizeConverter;
    /**
     * @var \Mpdf\Color\ColorConverter
     */
    private $colorConverter;
    /**
     * @var \Mpdf\Writer\BaseWriter
     */
    private $writer;
    public function __construct(Mpdf $mpdf, SizeConverter $sizeConverter, ColorConverter $colorConverter, BaseWriter $writer)
    {
        $this->mpdf = $mpdf;
        $this->sizeConverter = $sizeConverter;
        $this->colorConverter = $colorConverter;
        $this->writer = $writer;
    }
    // mPDF 5.3.A1
    public function CoonsPatchMesh($x, $y, $w, $h, $patch_array = [], $x_min = 0, $x_max = 1, $y_min = 0, $y_max = 1, $colspace = 'RGB', $return = \false)
    {
        $s = ' q ';
        $s .= \sprintf(' %.3F %.3F %.3F %.3F re W n ', $x * Mpdf::SCALE, ($this->mpdf->h - $y) * Mpdf::SCALE, $w * Mpdf::SCALE, -$h * Mpdf::SCALE);
        $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);
        $n = \count($this->mpdf->gradients) + 1;
        $this->mpdf->gradients[$n]['type'] = 6;
        //coons patch mesh
        $this->mpdf->gradients[$n]['colorspace'] = $colspace;
        //coons patch mesh
        $bpcd = 65535;
        //16 BitsPerCoordinate
        $trans = \false;
        $this->mpdf->gradients[$n]['stream'] = '';
        for ($i = 0; $i < \count($patch_array); $i++) {
            $this->mpdf->gradients[$n]['stream'] .= \chr($patch_array[$i]['f']);
            //start with the edge flag as 8 bit
            for ($j = 0; $j < \count($patch_array[$i]['points']); $j++) {
                // each point as 16 bit
                if ($j % 2 == 1) {
                    // Y coordinate (adjusted as input is From top left)
                    $patch_array[$i]['points'][$j] = ($patch_array[$i]['points'][$j] - $y_min) / ($y_max - $y_min) * $bpcd;
                    $patch_array[$i]['points'][$j] = $bpcd - $patch_array[$i]['points'][$j];
                } else {
                    $patch_array[$i]['points'][$j] = ($patch_array[$i]['points'][$j] - $x_min) / ($x_max - $x_min) * $bpcd;
                }
                if ($patch_array[$i]['points'][$j] < 0) {
                    $patch_array[$i]['points'][$j] = 0;
                }
                if ($patch_array[$i]['points'][$j] > $bpcd) {
                    $patch_array[$i]['points'][$j] = $bpcd;
                }
                $this->mpdf->gradients[$n]['stream'] .= \chr(\floor($patch_array[$i]['points'][$j] / 256));
                $this->mpdf->gradients[$n]['stream'] .= \chr(\floor(\round($patch_array[$i]['points'][$j]) % 256));
            }
            for ($j = 0; $j < \count($patch_array[$i]['colors']); $j++) {
                //each color component as 8 bit
                if ($colspace === 'RGB') {
                    $this->mpdf->gradients[$n]['stream'] .= $patch_array[$i]['colors'][$j][1];
                    $this->mpdf->gradients[$n]['stream'] .= $patch_array[$i]['colors'][$j][2];
                    $this->mpdf->gradients[$n]['stream'] .= $patch_array[$i]['colors'][$j][3];
                    if (isset($patch_array[$i]['colors'][$j][4]) && \ord($patch_array[$i]['colors'][$j][4]) < 100) {
                        $trans = \true;
                    }
                } elseif ($colspace === 'CMYK') {
                    $this->mpdf->gradients[$n]['stream'] .= \chr(\ord($patch_array[$i]['colors'][$j][1]) * 2.55);
                    $this->mpdf->gradients[$n]['stream'] .= \chr(\ord($patch_array[$i]['colors'][$j][2]) * 2.55);
                    $this->mpdf->gradients[$n]['stream'] .= \chr(\ord($patch_array[$i]['colors'][$j][3]) * 2.55);
                    $this->mpdf->gradients[$n]['stream'] .= \chr(\ord($patch_array[$i]['colors'][$j][4]) * 2.55);
                    if (isset($patch_array[$i]['colors'][$j][5]) && \ord($patch_array[$i]['colors'][$j][5]) < 100) {
                        $trans = \true;
                    }
                } elseif ($colspace === 'Gray') {
                    $this->mpdf->gradients[$n]['stream'] .= $patch_array[$i]['colors'][$j][1];
                    if ($patch_array[$i]['colors'][$j][2] == 1) {
                        $trans = \true;
                    }
                    // transparency converted from rgba or cmyka()
                }
            }
        }
        // TRANSPARENCY
        if ($trans) {
            $this->mpdf->gradients[$n]['stream_trans'] = '';
            for ($i = 0; $i < \count($patch_array); $i++) {
                $this->mpdf->gradients[$n]['stream_trans'] .= \chr($patch_array[$i]['f']);
                for ($j = 0; $j < \count($patch_array[$i]['points']); $j++) {
                    // each point as 16 bit
                    $this->mpdf->gradients[$n]['stream_trans'] .= \chr(\floor($patch_array[$i]['points'][$j] / 256));
                    $this->mpdf->gradients[$n]['stream_trans'] .= \chr(\floor(\round($patch_array[$i]['points'][$j]) % 256));
                }
                for ($j = 0; $j < \count($patch_array[$i]['colors']); $j++) {
                    // each color component as 8 bit // OPACITY
                    if ($colspace === 'RGB') {
                        $this->mpdf->gradients[$n]['stream_trans'] .= \chr((int) (\ord($patch_array[$i]['colors'][$j][4]) * 2.55));
                    } elseif ($colspace === 'CMYK') {
                        $this->mpdf->gradients[$n]['stream_trans'] .= \chr((int) (\ord($patch_array[$i]['colors'][$j][5]) * 2.55));
                    } elseif ($colspace === 'Gray') {
                        $this->mpdf->gradients[$n]['stream_trans'] .= \chr((int) (\ord($patch_array[$i]['colors'][$j][3]) * 2.55));
                    }
                }
            }
            $this->mpdf->gradients[$n]['trans'] = \true;
            $s .= ' /TGS' . $n . ' gs ';
        }
        // paint the gradient
        $s .= '/Sh' . $n . ' sh' . "\n";
        // restore previous Graphic State
        $s .= 'Q' . "\n";
        if ($return) {
            return $s;
        }
        $this->writer->write($s);
    }
    // type = linear:2; radial: 3;
    // Linear: $coords - array of the form (x1, y1, x2, y2) which defines the gradient vector (see linear_gradient_coords.jpg).
    //    The default value is from left to right (x1=0, y1=0, x2=1, y2=0).
    // Radial: $coords - array of the form (fx, fy, cx, cy, r) where (fx, fy) is the starting point of the gradient with color1,
    //    (cx, cy) is the center of the circle with color2, and r is the radius of the circle (see radial_gradient_coords.jpg).
    //    (fx, fy) should be inside the circle, otherwise some areas will not be defined
    // $col = array(R,G,B/255); or array(G/255); or array(C,M,Y,K/100)
    // $stops = array('col'=>$col [, 'opacity'=>0-1] [, 'offset'=>0-1])
    public function Gradient($x, $y, $w, $h, $type, $stops = [], $colorspace = 'RGB', $coords = '', $extend = '', $return = \false, $is_mask = \false)
    {
        if ($type && \stripos($type, 'L') === 0) {
            $type = self::TYPE_LINEAR;
        } elseif ($type && \stripos($type, 'R') === 0) {
            $type = self::TYPE_RADIAL;
        }
        if ($colorspace !== 'CMYK' && $colorspace !== 'Gray') {
            $colorspace = 'RGB';
        }
        $bboxw = $w;
        $bboxh = $h;
        $usex = $x;
        $usey = $y;
        $usew = $bboxw;
        $useh = $bboxh;
        if ($type < 1) {
            $type = self::TYPE_LINEAR;
        }
        if ($coords[0] !== \false && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $coords[0], $m)) {
            $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
            if ($tmp) {
                $coords[0] = $tmp / $w;
            }
        }
        if ($coords[1] !== \false && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $coords[1], $m)) {
            $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
            if ($tmp) {
                $coords[1] = 1 - $tmp / $h;
            }
        }
        if ($type == self::TYPE_LINEAR) {
            $angle = isset($coords[4]) ? $coords[4] : \false;
            $repeat = isset($coords[5]) ? $coords[5] : \false;
            // ALL POINTS SET (default for custom mPDF linear gradient) - no -moz
            if ($coords[0] !== \false && $coords[1] !== \false && $coords[2] !== \false && $coords[3] !== \false) {
                // do nothing - coords used as they are
            } elseif ($angle !== \false && $coords[0] !== \false && $coords[1] !== \false && $coords[2] === \false && $coords[3] === \false) {
                // If both a <point> and <angle> are defined, the gradient axis starts from the point and runs along the angle. The end point is
                // defined as before - in this case start points may not be in corners, and axis may not correctly fall in the right quadrant.
                // NO end points (Angle defined & Start points)
                if ($angle == 0 || $angle == 360) {
                    $coords[3] = $coords[1];
                    if ($coords[0] == 1) {
                        $coords[2] = 2;
                    } else {
                        $coords[2] = 1;
                    }
                } elseif ($angle == 90) {
                    $coords[2] = $coords[0];
                    $coords[3] = 1;
                    if ($coords[1] == 1) {
                        $coords[3] = 2;
                    } else {
                        $coords[3] = 1;
                    }
                } elseif ($angle == 180) {
                    if ($coords[4] == 0) {
                        $coords[2] = -1;
                    } else {
                        $coords[2] = 0;
                    }
                    $coords[3] = $coords[1];
                } elseif ($angle == 270) {
                    $coords[2] = $coords[0];
                    if ($coords[1] == 0) {
                        $coords[3] = -1;
                    } else {
                        $coords[3] = 0;
                    }
                } else {
                    $endx = 1;
                    $endy = 1;
                    if ($angle <= 90) {
                        if ($angle <= 45) {
                            $endy = \tan(\deg2rad($angle));
                        } else {
                            $endx = \tan(\deg2rad(90 - $angle));
                        }
                        $b = \atan2($endy * $bboxh, $endx * $bboxw);
                        $ny = 1 - $coords[1] - \tan($b) * (1 - $coords[0]);
                        $tx = \sin($b) * \cos($b) * $ny;
                        $ty = \cos($b) * \cos($b) * $ny;
                        $coords[2] = 1 + $tx;
                        $coords[3] = 1 - $ty;
                    } elseif ($angle <= 180) {
                        if ($angle <= 135) {
                            $endx = \tan(\deg2rad($angle - 90));
                        } else {
                            $endy = \tan(\deg2rad(180 - $angle));
                        }
                        $b = \atan2($endy * $bboxh, $endx * $bboxw);
                        $ny = 1 - $coords[1] - \tan($b) * $coords[0];
                        $tx = \sin($b) * \cos($b) * $ny;
                        $ty = \cos($b) * \cos($b) * $ny;
                        $coords[2] = -$tx;
                        $coords[3] = 1 - $ty;
                    } elseif ($angle <= 270) {
                        if ($angle <= 225) {
                            $endy = \tan(\deg2rad($angle - 180));
                        } else {
                            $endx = \tan(\deg2rad(270 - $angle));
                        }
                        $b = \atan2($endy * $bboxh, $endx * $bboxw);
                        $ny = $coords[1] - \tan($b) * $coords[0];
                        $tx = \sin($b) * \cos($b) * $ny;
                        $ty = \cos($b) * \cos($b) * $ny;
                        $coords[2] = -$tx;
                        $coords[3] = $ty;
                    } else {
                        if ($angle <= 315) {
                            $endx = \tan(\deg2rad($angle - 270));
                        } else {
                            $endy = \tan(\deg2rad(360 - $angle));
                        }
                        $b = \atan2($endy * $bboxh, $endx * $bboxw);
                        $ny = $coords[1] - \tan($b) * (1 - $coords[0]);
                        $tx = \sin($b) * \cos($b) * $ny;
                        $ty = \cos($b) * \cos($b) * $ny;
                        $coords[2] = 1 + $tx;
                        $coords[3] = $ty;
                    }
                }
            } elseif ($angle !== \false && $coords[0] === \false && $coords[1] === \false) {
                // -moz If the first parameter is only an <angle>, the gradient axis starts from the box's corner that would ensure the
                // axis goes through the box. The axis runs along the specified angle. The end point of the axis is defined such that the
                // farthest corner of the box from the starting point is perpendicular to the gradient axis at that point.
                // NO end points or Start points (Angle defined)
                if ($angle == 0 || $angle == 360) {
                    $coords[0] = 0;
                    $coords[1] = 0;
                    $coords[2] = 1;
                    $coords[3] = 0;
                } elseif ($angle == 90) {
                    $coords[0] = 0;
                    $coords[1] = 0;
                    $coords[2] = 0;
                    $coords[3] = 1;
                } elseif ($angle == 180) {
                    $coords[0] = 1;
                    $coords[1] = 0;
                    $coords[2] = 0;
                    $coords[3] = 0;
                } elseif ($angle == 270) {
                    $coords[0] = 0;
                    $coords[1] = 1;
                    $coords[2] = 0;
                    $coords[3] = 0;
                } else {
                    if ($angle <= 90) {
                        $coords[0] = 0;
                        $coords[1] = 0;
                        if ($angle <= 45) {
                            $endx = 1;
                            $endy = \tan(\deg2rad($angle));
                        } else {
                            $endx = \tan(\deg2rad(90 - $angle));
                            $endy = 1;
                        }
                    } elseif ($angle <= 180) {
                        $coords[0] = 1;
                        $coords[1] = 0;
                        if ($angle <= 135) {
                            $endx = \tan(\deg2rad($angle - 90));
                            $endy = 1;
                        } else {
                            $endx = 1;
                            $endy = \tan(\deg2rad(180 - $angle));
                        }
                    } elseif ($angle <= 270) {
                        $coords[0] = 1;
                        $coords[1] = 1;
                        if ($angle <= 225) {
                            $endx = 1;
                            $endy = \tan(\deg2rad($angle - 180));
                        } else {
                            $endx = \tan(\deg2rad(270 - $angle));
                            $endy = 1;
                        }
                    } else {
                        $coords[0] = 0;
                        $coords[1] = 1;
                        if ($angle <= 315) {
                            $endx = \tan(\deg2rad($angle - 270));
                            $endy = 1;
                        } else {
                            $endx = 1;
                            $endy = \tan(\deg2rad(360 - $angle));
                        }
                    }
                    $b = \atan2($endy * $bboxh, $endx * $bboxw);
                    $h2 = $bboxh - $bboxh * \tan($b);
                    $px = $bboxh + $h2 * \sin($b) * \cos($b);
                    $py = $bboxh * \tan($b) + $h2 * \sin($b) * \sin($b);
                    $x1 = $px / $bboxh;
                    $y1 = $py / $bboxh;
                    if ($angle <= 90) {
                        $coords[2] = $x1;
                        $coords[3] = $y1;
                    } elseif ($angle <= 180) {
                        $coords[2] = 1 - $x1;
                        $coords[3] = $y1;
                    } elseif ($angle <= 270) {
                        $coords[2] = 1 - $x1;
                        $coords[3] = 1 - $y1;
                    } else {
                        $coords[2] = $x1;
                        $coords[3] = 1 - $y1;
                    }
                }
            } elseif ((!isset($angle) || $angle === \false) && $coords[0] !== \false && $coords[1] !== \false) {
                // -moz If the first parameter to the gradient function is only a <point>, the gradient axis starts from the specified point,
                // 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
                // gradient is to be applied to.
                // NO angle and NO end points (Start points defined)
                $coords[2] = 1 - $coords[0];
                $coords[3] = 1 - $coords[1];
                $angle = \rad2deg(\atan2($coords[3] - $coords[1], $coords[2] - $coords[0]));
                if ($angle < 0) {
                    $angle += 360;
                } elseif ($angle > 360) {
                    $angle -= 360;
                }
                if ($angle != 0 && $angle != 360 && $angle != 90 && $angle != 180 && $angle != 270) {
                    if ($w >= $h) {
                        $coords[1] *= $h / $w;
                        $coords[3] *= $h / $w;
                        $usew = $useh = $bboxw;
                        $usey -= $w - $h;
                    } else {
                        $coords[0] *= $w / $h;
                        $coords[2] *= $w / $h;
                        $usew = $useh = $bboxh;
                    }
                }
            } else {
                // default values T2B
                // -moz If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values, the gradient
                // axis starts from the top of the box and runs vertically downwards, ending at the bottom of the box.
                // All values are set in parseMozGradient - so won't appear here
                $coords = [0, 0, 1, 0];
                // default for original linear gradient (L2R)
            }
        } elseif ($type == self::TYPE_RADIAL) {
            $radius = isset($coords[4]) ? $coords[4] : \false;
            $shape = isset($coords[6]) ? $coords[6] : \false;
            $size = isset($coords[7]) ? $coords[7] : \false;
            $repeat = isset($coords[8]) ? $coords[8] : \false;
            // ALL POINTS AND RADIUS SET (default for custom mPDF radial gradient) - no -moz
            if ($coords[0] !== \false && $coords[1] !== \false && $coords[2] !== \false && $coords[3] !== \false && $coords[4] !== \false) {
                // If a <point> is defined
                // do nothing - coords used as they are
            } elseif ($shape !== \false && $size !== \false) {
                if ($coords[2] == \false) {
                    $coords[2] = $coords[0];
                }
                if ($coords[3] == \false) {
                    $coords[3] = $coords[1];
                }
                // ELLIPSE
                if ($shape === 'ellipse') {
                    $corner1 = \sqrt($coords[0] ** 2 + $coords[1] ** 2);
                    $corner2 = \sqrt($coords[0] ** 2 + (1 - $coords[1]) ** 2);
                    $corner3 = \sqrt((1 - $coords[0]) ** 2 + $coords[1] ** 2);
                    $corner4 = \sqrt((1 - $coords[0]) ** 2 + (1 - $coords[1]) ** 2);
                    if ($size === 'closest-side') {
                        $radius = \min($coords[0], $coords[1], 1 - $coords[0], 1 - $coords[1]);
                    } elseif ($size === 'closest-corner') {
                        $radius = \min($corner1, $corner2, $corner3, $corner4);
                    } elseif ($size === 'farthest-side') {
                        $radius = \max($coords[0], $coords[1], 1 - $coords[0], 1 - $coords[1]);
                    } else {
                        $radius = \max($corner1, $corner2, $corner3, $corner4);
                    }
                    // farthest corner (default)
                } elseif ($shape === 'circle') {
                    if ($w >= $h) {
                        $coords[1] = $coords[3] = $coords[1] * $h / $w;
                        $corner1 = \sqrt($coords[0] ** 2 + $coords[1] ** 2);
                        $corner2 = \sqrt($coords[0] ** 2 + ($h / $w - $coords[1]) ** 2);
                        $corner3 = \sqrt((1 - $coords[0]) ** 2 + $coords[1] ** 2);
                        $corner4 = \sqrt((1 - $coords[0]) ** 2 + ($h / $w - $coords[1]) ** 2);
                        if ($size === 'closest-side') {
                            $radius = \min($coords[0], $coords[1], 1 - $coords[0], $h / $w - $coords[1]);
                        } elseif ($size === 'closest-corner') {
                            $radius = \min($corner1, $corner2, $corner3, $corner4);
                        } elseif ($size === 'farthest-side') {
                            $radius = \max($coords[0], $coords[1], 1 - $coords[0], $h / $w - $coords[1]);
                        } elseif ($size === 'farthest-corner') {
                            $radius = \max($corner1, $corner2, $corner3, $corner4);
                        }
                        // farthest corner (default)
                        $usew = $useh = $bboxw;
                        $usey -= $w - $h;
                    } else {
                        $coords[0] = $coords[2] = $coords[0] * $w / $h;
                        $corner1 = \sqrt($coords[0] ** 2 + $coords[1] ** 2);
                        $corner2 = \sqrt($coords[0] ** 2 + (1 - $coords[1]) ** 2);
                        $corner3 = \sqrt(($w / $h - $coords[0]) ** 2 + $coords[1] ** 2);
                        $corner4 = \sqrt(($w / $h - $coords[0]) ** 2 + (1 - $coords[1]) ** 2);
                        if ($size === 'closest-side') {
                            $radius = \min($coords[0], $coords[1], $w / $h - $coords[0], 1 - $coords[1]);
                        } elseif ($size === 'closest-corner') {
                            $radius = \min($corner1, $corner2, $corner3, $corner4);
                        } elseif ($size === 'farthest-side') {
                            $radius = \max($coords[0], $coords[1], $w / $h - $coords[0], 1 - $coords[1]);
                        } elseif ($size === 'farthest-corner') {
                            $radius = \max($corner1, $corner2, $corner3, $corner4);
                        }
                        // farthest corner (default)
                        $usew = $useh = $bboxh;
                    }
                }
                if ($radius == 0) {
                    $radius = 0.001;
                }
                // to prevent error
                $coords[4] = $radius;
            } else {
                // -moz If entire function consists of only <stop> values
                // All values are set in parseMozGradient - so won't appear here
                $coords = [0.5, 0.5, 0.5, 0.5];
                // default for radial gradient (centred)
            }
        }
        $s = ' q';
        $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";
        $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";
        $n = \count($this->mpdf->gradients) + 1;
        $this->mpdf->gradients[$n]['type'] = $type;
        $this->mpdf->gradients[$n]['colorspace'] = $colorspace;
        $trans = \false;
        $this->mpdf->gradients[$n]['is_mask'] = $is_mask;
        if ($is_mask) {
            $trans = \true;
        }
        if (\count($stops) == 1) {
            $stops[1] = $stops[0];
        }
        if (!isset($stops[0]['offset'])) {
            $stops[0]['offset'] = 0;
        }
        if (!isset($stops[\count($stops) - 1]['offset'])) {
            $stops[\count($stops) - 1]['offset'] = 1;
        }
        // Fix stop-offsets set as absolute lengths
        if ($type == self::TYPE_LINEAR) {
            $axisx = ($coords[2] - $coords[0]) * $usew;
            $axisy = ($coords[3] - $coords[1]) * $useh;
            $axis_length = \sqrt($axisx ** 2 + $axisy ** 2);
        } else {
            $axis_length = $coords[4] * $usew;
        }
        // Absolute lengths are meaningless for an ellipse - Firefox uses Width as reference
        for ($i = 0; $i < \count($stops); $i++) {
            if (isset($stops[$i]['offset']) && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $stops[$i]['offset'], $m)) {
                $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                $stops[$i]['offset'] = $axis_length ? $tmp / $axis_length : 0;
            }
        }
        if (isset($stops[0]['offset']) && $stops[0]['offset'] > 0) {
            $firststop = $stops[0];
            $firststop['offset'] = 0;
            \array_unshift($stops, $firststop);
        }
        if (!$repeat && isset($stops[\count($stops) - 1]['offset']) && $stops[\count($stops) - 1]['offset'] < 1) {
            $endstop = $stops[\count($stops) - 1];
            $endstop['offset'] = 1;
            $stops[] = $endstop;
        }
        if ($stops[0]['offset'] > $stops[\count($stops) - 1]['offset']) {
            $stops[0]['offset'] = 0;
            $stops[\count($stops) - 1]['offset'] = 1;
        }
        for ($i = 0; $i < \count($stops); $i++) {
            // mPDF 5.3.74
            if ($colorspace === 'CMYK') {
                $this->mpdf->gradients[$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[$i]['col'][4]) / 100);
            } elseif ($colorspace === 'Gray') {
                $this->mpdf->gradients[$n]['stops'][$i]['col'] = \sprintf('%.3F', \ord($stops[$i]['col'][1]) / 255);
            } else {
                $this->mpdf->gradients[$n]['stops'][$i]['col'] = \sprintf('%.3F %.3F %.3F', \ord($stops[$i]['col'][1]) / 255, \ord($stops[$i]['col'][2]) / 255, \ord($stops[$i]['col'][3]) / 255);
            }
            if (!isset($stops[$i]['opacity'])) {
                $stops[$i]['opacity'] = 1;
            } elseif ($stops[$i]['opacity'] > 1 || $stops[$i]['opacity'] < 0) {
                $stops[$i]['opacity'] = 1;
            } elseif ($stops[$i]['opacity'] < 1) {
                $trans = \true;
            }
            $this->mpdf->gradients[$n]['stops'][$i]['opacity'] = $stops[$i]['opacity'];
            // OFFSET
            if ($i > 0 && $i < \count($stops) - 1) {
                if (!isset($stops[$i]['offset']) || isset($stops[$i + 1]['offset']) && $stops[$i]['offset'] > $stops[$i + 1]['offset'] || $stops[$i]['offset'] < $stops[$i - 1]['offset']) {
                    if (isset($stops[$i - 1]['offset']) && isset($stops[$i + 1]['offset'])) {
                        $stops[$i]['offset'] = ($stops[$i - 1]['offset'] + $stops[$i + 1]['offset']) / 2;
                    } else {
                        for ($j = $i + 1; $j < \count($stops); $j++) {
                            if (isset($stops[$j]['offset'])) {
                                break;
                            }
                        }
                        $int = ($stops[$j]['offset'] - $stops[$i - 1]['offset']) / ($j - $i + 1);
                        for ($f = 0; $f < $j - $i - 1; $f++) {
                            $stops[$i + $f]['offset'] = $stops[$i + $f - 1]['offset'] + $int;
                        }
                    }
                }
            }
            $this->mpdf->gradients[$n]['stops'][$i]['offset'] = $stops[$i]['offset'];
        }
        if ($repeat) {
            $ns = \count($this->mpdf->gradients[$n]['stops']);
            $offs = [];
            for ($i = 0; $i < $ns; $i++) {
                $offs[$i] = $this->mpdf->gradients[$n]['stops'][$i]['offset'];
            }
            $gp = 0;
            $inside = \true;
            while ($inside) {
                $gp++;
                for ($i = 0; $i < $ns; $i++) {
                    $this->mpdf->gradients[$n]['stops'][$ns * $gp + $i] = $this->mpdf->gradients[$n]['stops'][$ns * ($gp - 1) + $i];
                    $tmp = $this->mpdf->gradients[$n]['stops'][$ns * ($gp - 1) + ($ns - 1)]['offset'] + $offs[$i];
                    if ($tmp < 1) {
                        $this->mpdf->gradients[$n]['stops'][$ns * $gp + $i]['offset'] = $tmp;
                    } else {
                        $this->mpdf->gradients[$n]['stops'][$ns * $gp + $i]['offset'] = 1;
                        $inside = \false;
                        break;
                    }
                }
            }
        }
        if ($trans) {
            $this->mpdf->gradients[$n]['trans'] = \true;
            $s .= ' /TGS' . $n . ' gs ';
        }
        if (!\is_array($extend) || \count($extend) < 1) {
            $extend = ['true', 'true'];
            // These are supposed to be quoted - appear in PDF file as text
        }
        $this->mpdf->gradients[$n]['coords'] = $coords;
        $this->mpdf->gradients[$n]['extend'] = $extend;
        //paint the gradient
        $s .= '/Sh' . $n . ' sh ' . "\n";
        //restore previous Graphic State
        $s .= ' Q ' . "\n";
        if ($return) {
            return $s;
        }
        $this->writer->write($s);
    }
    private function parseMozLinearGradient($m, $repeat)
    {
        $g = [];
        $g['type'] = self::TYPE_LINEAR;
        $g['colorspace'] = 'RGB';
        $g['extend'] = ['true', 'true'];
        $v = \trim($m[1]);
        // Change commas inside e.g. rgb(x,x,x)
        while (\preg_match('/(\\([^\\)]*?),/', $v)) {
            $v = \preg_replace('/(\\([^\\)]*?),/', '\\1@', $v);
        }
        // Remove spaces inside e.g. rgb(x, x, x)
        while (\preg_match('/(\\([^\\)]*?)[ ]/', $v)) {
            $v = \preg_replace('/(\\([^\\)]*?)[ ]/', '\\1', $v);
        }
        $bgr = \preg_split('/\\s*,\\s*/', $v);
        for ($i = 0; $i < \count($bgr); $i++) {
            $bgr[$i] = \preg_replace('/@/', ',', $bgr[$i]);
        }
        // Is first part $bgr[0] a valid point/angle?
        $first = \preg_split('/\\s+/', \trim($bgr[0]));
        if (\preg_match('/(left|center|right|bottom|top|deg|grad|rad)/i', $bgr[0]) && !\preg_match('/(<#|rgb|rgba|hsl|hsla)/i', $bgr[0])) {
            $startStops = 1;
        } elseif (\trim($first[\count($first) - 1]) === '0') {
            $startStops = 1;
        } else {
            $check = $this->colorConverter->convert($first[0], $this->mpdf->PDFAXwarnings);
            $startStops = 1;
            if ($check) {
                $startStops = 0;
            }
        }
        // first part a valid point/angle?
        if ($startStops === 1) {
            // default values
            // [<point> || <angle>,] = [<% em px left center right bottom top> || <deg grad rad 0>,]
            if (\preg_match('/([\\-]*[0-9\\.]+)(deg|grad|rad)/i', $bgr[0], $m)) {
                $angle = $m[1] + 0;
                if (\strtolower($m[2]) === 'grad') {
                    $angle *= 360 / 400;
                } elseif (\strtolower($m[2]) === 'rad') {
                    $angle = \rad2deg($angle);
                }
                while ($angle < 0) {
                    $angle += 360;
                }
                $angle %= 360;
            } elseif (\trim($first[\count($first) - 1]) === '0') {
                $angle = 0;
            }
            if (\stripos($bgr[0], 'left') !== \false) {
                $startx = 1;
            } elseif (\stripos($bgr[0], 'right') !== \false) {
                $startx = 0;
            }
            if (\stripos($bgr[0], 'top') !== \false) {
                $starty = 1;
            } elseif (\stripos($bgr[0], 'bottom') !== \false) {
                $starty = 0;
            }
            // Check for %? ?% or %%
            if (\preg_match('/(\\d+)[%]/i', $first[0], $m)) {
                $startx = $m[1] / 100;
            } elseif (!isset($startx) && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[0], $m)) {
                $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                if ($tmp) {
                    $startx = $m[1];
                }
            }
            if (isset($first[1]) && \preg_match('/(\\d+)[%]/i', $first[1], $m)) {
                $starty = 1 - $m[1] / 100;
            } elseif (!isset($starty) && isset($first[1]) && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[1], $m)) {
                $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                if ($tmp) {
                    $starty = $m[1];
                }
            }
            if (isset($startx) && !isset($starty)) {
                $starty = 0.5;
            }
            if (!isset($startx) && isset($starty)) {
                $startx = 0.5;
            }
        } else {
            // If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values,
            // the gradient axis starts from the top of the box and runs vertically downwards, ending at the bottom of
            // the box.
            $starty = 1;
            $startx = 0.5;
            $endy = 0;
            $endx = 0.5;
        }
        if (!isset($startx)) {
            $startx = \false;
        }
        if (!isset($starty)) {
            $starty = \false;
        }
        if (!isset($endx)) {
            $endx = \false;
        }
        if (!isset($endy)) {
            $endy = \false;
        }
        if (!isset($angle)) {
            $angle = \false;
        }
        $g['coords'] = [$startx, $starty, $endx, $endy, $angle, $repeat];
        $g['stops'] = [];
        for ($i = $startStops; $i < \count($bgr); $i++) {
            // parse stops
            $el = \preg_split('/\\s+/', \trim($bgr[$i]));
            // mPDF 5.3.74
            $col = $this->colorConverter->convert($el[0], $this->mpdf->PDFAXwarnings);
            if (!$col) {
                $col = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
            }
            if ($col[0] == 1) {
                $g['colorspace'] = 'Gray';
            } elseif ($col[0] == 4 || $col[0] == 6) {
                $g['colorspace'] = 'CMYK';
            }
            $g['stops'][] = $this->getStop($col, $el, \true);
        }
        return $g;
    }
    private function parseMozRadialGradient($m, $repeat)
    {
        $g = [];
        $g['type'] = self::TYPE_RADIAL;
        $g['colorspace'] = 'RGB';
        $g['extend'] = ['true', 'true'];
        $v = \trim($m[1]);
        // Change commas inside e.g. rgb(x,x,x)
        while (\preg_match('/(\\([^\\)]*?),/', $v)) {
            $v = \preg_replace('/(\\([^\\)]*?),/', '\\1@', $v);
        }
        // Remove spaces inside e.g. rgb(x, x, x)
        while (\preg_match('/(\\([^\\)]*?)[ ]/', $v)) {
            $v = \preg_replace('/(\\([^\\)]*?)[ ]/', '\\1', $v);
        }
        $bgr = \preg_split('/\\s*,\\s*/', $v);
        for ($i = 0; $i < \count($bgr); $i++) {
            $bgr[$i] = \preg_replace('/@/', ',', $bgr[$i]);
        }
        // Is first part $bgr[0] a valid point/angle?
        $startStops = 0;
        $pos_angle = \false;
        $shape_size = \false;
        $first = \preg_split('/\\s+/', \trim($bgr[0]));
        $checkCol = $this->colorConverter->convert($first[0], $this->mpdf->PDFAXwarnings);
        if (\preg_match('/(left|center|right|bottom|top|deg|grad|rad)/i', $bgr[0]) && !\preg_match('/(<#|rgb|rgba|hsl|hsla)/i', $bgr[0])) {
            $startStops = 1;
            $pos_angle = $bgr[0];
        } elseif (\trim($first[\count($first) - 1]) === '0') {
            $startStops = 1;
            $pos_angle = $bgr[0];
        } elseif (\preg_match('/(circle|ellipse|closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $bgr[0])) {
            $startStops = 1;
            $shape_size = $bgr[0];
        } elseif (!$checkCol) {
            $startStops = 1;
            $pos_angle = $bgr[0];
        }
        if (\preg_match('/(circle|ellipse|closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $bgr[1])) {
            $startStops = 2;
            $shape_size = $bgr[1];
        }
        // If valid point/angle?
        if ($pos_angle) {
            // default values
            // [<point> || <angle>,] = [<% em px left center right bottom top> || <deg grad rad 0>,]
            if (\stripos($pos_angle, 'left') !== \false) {
                $startx = 0;
            } elseif (\stripos($pos_angle, 'right') !== \false) {
                $startx = 1;
            }
            if (\stripos($pos_angle, 'top') !== \false) {
                $starty = 1;
            } elseif (\stripos($pos_angle, 'bottom') !== \false) {
                $starty = 0;
            }
            // Check for %? ?% or %%
            if (\preg_match('/(\\d+)[%]/i', $first[0], $m)) {
                $startx = $m[1] / 100;
            } elseif (!isset($startx) && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[0], $m)) {
                $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                if ($tmp) {
                    $startx = $m[1];
                }
            }
            if (isset($first[1]) && \preg_match('/(\\d+)[%]/i', $first[1], $m)) {
                $starty = 1 - $m[1] / 100;
            } elseif (!isset($starty) && isset($first[1]) && \preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $first[1], $m)) {
                $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                if ($tmp) {
                    $starty = $m[1];
                }
            }
            if (!isset($starty)) {
                $starty = 0.5;
            }
            if (!isset($startx)) {
                $startx = 0.5;
            }
        } else {
            // If neither a <point> or <angle> is specified, i.e. the entire function consists of only <stop> values,
            // the gradient axis starts from the top of the box and runs vertically downwards, ending at the bottom of
            // the box. default values Center
            $starty = 0.5;
            $startx = 0.5;
            $endy = 0.5;
            $endx = 0.5;
        }
        // If valid shape/size?
        $shape = 'ellipse';
        // default
        $size = 'farthest-corner';
        // default
        if ($shape_size) {
            // default values
            if (\preg_match('/(circle|ellipse)/i', $shape_size, $m)) {
                $shape = $m[1];
            }
            if (\preg_match('/(closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i', $shape_size, $m)) {
                $size = $m[1];
                if ($size === 'contain') {
                    $size = 'closest-side';
                } elseif ($size === 'cover') {
                    $size = 'farthest-corner';
                }
            }
        }
        if (!isset($startx)) {
            $startx = \false;
        }
        if (!isset($starty)) {
            $starty = \false;
        }
        if (!isset($endx)) {
            $endx = \false;
        }
        if (!isset($endy)) {
            $endy = \false;
        }
        $radius = \false;
        $angle = 0;
        $g['coords'] = [$startx, $starty, $endx, $endy, $radius, $angle, $shape, $size, $repeat];
        $g['stops'] = [];
        for ($i = $startStops; $i < \count($bgr); $i++) {
            // parse stops
            $el = \preg_split('/\\s+/', \trim($bgr[$i]));
            // mPDF 5.3.74
            $col = $this->colorConverter->convert($el[0], $this->mpdf->PDFAXwarnings);
            if (!$col) {
                $col = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
            }
            if ($col[0] == 1) {
                $g['colorspace'] = 'Gray';
            } elseif ($col[0] == 4 || $col[0] == 6) {
                $g['colorspace'] = 'CMYK';
            }
            $g['stops'][] = $this->getStop($col, $el);
        }
        return $g;
    }
    private function getStop($col, $el, $convertOffset = \false)
    {
        $stop = ['col' => $col];
        if ($col[0] == 5) {
            // transparency from rgba()
            $stop['opacity'] = \ord($col[4]) / 100;
        } elseif ($col[0] == 6) {
            // transparency from cmyka()
            $stop['opacity'] = \ord($col[5]) / 100;
        } elseif ($col[0] == 1 && $col[2] == 1) {
            // transparency converted from rgba or cmyka()
            $stop['opacity'] = \ord($col[3]) / 100;
        }
        if (isset($el[1])) {
            if (\preg_match('/(\\d+)[%]/', $el[1], $m)) {
                $stop['offset'] = $m[1] / 100;
                if ($stop['offset'] > 1) {
                    unset($stop['offset']);
                }
            } elseif (\preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i', $el[1], $m)) {
                if ($convertOffset) {
                    $tmp = $this->sizeConverter->convert($m[1], $this->mpdf->w, $this->mpdf->FontSize, \false);
                    if ($tmp) {
                        $stop['offset'] = $m[1];
                    }
                } else {
                    $stop['offset'] = $el[1];
                }
            }
        }
        return $stop;
    }
    public function parseMozGradient($bg)
    {
        //	background[-image]: -moz-linear-gradient(left, #c7Fdde 20%, #FF0000 );
        //	background[-image]: linear-gradient(left, #c7Fdde 20%, #FF0000 ); // CSS3
        $repeat = \strpos($bg, 'repeating-') !== \false;
        if (\preg_match('/linear-gradient\\((.*)\\)/', $bg, $m)) {
            $g = $this->parseMozLinearGradient($m, $repeat);
            if (\count($g['stops'])) {
                return $g;
            }
        } elseif (\preg_match('/radial-gradient\\((.*)\\)/', $bg, $m)) {
            $g = $this->parseMozRadialGradient($m, $repeat);
            if (\count($g['stops'])) {
                return $g;
            }
        }
        return [];
    }
    public function parseBackgroundGradient($bg)
    {
        // background-gradient: linear #00FFFF #FFFF00 0 0.5 1 0.5;  or
        // background-gradient: radial #00FFFF #FFFF00 0.5 0.5 1 1 1.2;
        $v = \trim($bg);
        $bgr = \preg_split('/\\s+/', $v);
        $count_bgr = \count($bgr);
        $g = [];
        if ($count_bgr > 6) {
            if (\stripos($bgr[0], 'L') === 0 && $count_bgr === 7) {
                // linear
                $g['type'] = self::TYPE_LINEAR;
                //$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
                // Linear: $coords - array of the form (x1, y1, x2, y2) which defines the gradient vector (see linear_gradient_coords.jpg).
                //    The default value is from left to right (x1=0, y1=0, x2=1, y2=0).
                $g['coords'] = [$bgr[3], $bgr[4], $bgr[5], $bgr[6]];
            } elseif ($count_bgr === 8) {
                // radial
                $g['type'] = self::TYPE_RADIAL;
                // Radial: $coords - array of the form (fx, fy, cx, cy, r) where (fx, fy) is the starting point of the gradient with color1,
                //    (cx, cy) is the center of the circle with color2, and r is the radius of the circle (see radial_gradient_coords.jpg).
                //    (fx, fy) should be inside the circle, otherwise some areas will not be defined
                $g['coords'] = [$bgr[3], $bgr[4], $bgr[5], $bgr[6], $bgr[7]];
            }
            $g['colorspace'] = 'RGB';
            // mPDF 5.3.74
            $cor = $this->colorConverter->convert($bgr[1], $this->mpdf->PDFAXwarnings);
            if ($cor[0] == 1) {
                $g['colorspace'] = 'Gray';
            } elseif ($cor[0] == 4 || $cor[0] == 6) {
                $g['colorspace'] = 'CMYK';
            }
            if ($cor) {
                $g['col'] = $cor;
            } else {
                $g['col'] = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
            }
            $cor = $this->colorConverter->convert($bgr[2], $this->mpdf->PDFAXwarnings);
            if ($cor) {
                $g['col2'] = $cor;
            } else {
                $g['col2'] = $this->colorConverter->convert(255, $this->mpdf->PDFAXwarnings);
            }
            $g['extend'] = ['true', 'true'];
            $g['stops'] = [['col' => $g['col'], 'opacity' => 1, 'offset' => 0], ['col' => $g['col2'], 'opacity' => 1, 'offset' => 1]];
            return $g;
        }
        return \false;
    }
}
