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Current File : /var/www/html/kalemon/public/hifthinkeractive/application/third_party/mpdf/classes/grad.php
<?php

class grad {

var $mpdf = null;

function grad(&$mpdf) {
	$this->mpdf = $mpdf;
}

// mPDF 5.3.A1
function CoonsPatchMesh($x, $y, $w, $h, $patch_array=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 ', $x*_MPDFK, ($this->mpdf->h-$y)*_MPDFK, $w*_MPDFK, -$h*_MPDFK);
	$s.=sprintf(' %.3F 0 0 %.3F %.3F %.3F cm ', $w*_MPDFK, $h*_MPDFK, $x*_MPDFK, ($this->mpdf->h-($y+$h))*_MPDFK);
	$n = count($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($patch_array[$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) { $trans = true; }
			}
			else if ($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) { $trans = true; }
			}
			else if ($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($patch_array[$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(intval(ord($patch_array[$i]['colors'][$j][4])*2.55));
				}
				else if ($colspace=='CMYK') {
					$this->mpdf->gradients[$n]['stream_trans'].=chr(intval(ord($patch_array[$i]['colors'][$j][5])*2.55));
				}
				else if ($colspace=='Gray') {
					$this->mpdf->gradients[$n]['stream_trans'].=chr(intval(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; }
	else { $this->mpdf->_out($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])
function Gradient($x, $y, $w, $h, $type, $stops=array(), $colorspace='RGB', $coords='', $extend='', $return=false, $is_mask=false) {
	if (strtoupper(substr($type,0,1)) == 'L') { $type = 2; }	// linear
	else if (strtoupper(substr($type,0,1)) == 'R') { $type = 3; }	// radial
	if ($colorspace != 'CMYK' && $colorspace != 'Gray') {
		$colorspace = 'RGB';
	}
	$bboxw = $w;
	$bboxh = $h;
	$usex = $x;
	$usey = $y;
	$usew = $bboxw;
	$useh = $bboxh;
	if ($type < 1) { $type = 2; }
	if ($coords[0]!==false && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$coords[0],$m)) { 
		$tmp = $this->mpdf->ConvertSize($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 = $this->mpdf->ConvertSize($m[1],$this->mpdf->w,$this->mpdf->FontSize,false);
		if ($tmp) { $coords[1] = 1-($tmp/$h); }
	}
	// LINEAR
	if ($type == 2) { 
		$angle = $coords[4];
		$repeat = $coords[5];
		// ALL POINTS SET (default for custom mPDF linear gradient) - no -moz
		if ($coords[0]!==false && $coords[1]!==false && $coords[2]!==false && $coords[3]!==false) {
			// do nothing - coords used as they are
		}

		// 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)
		else if ($angle!==false && $coords[0]!==false && $coords[1]!==false && $coords[2]===false && $coords[3]===false) {
		  if ($angle==0 || $angle==360) { $coords[3]=$coords[1]; if ($coords[0]==1) $coords[2]=2; else $coords[2]=1; }
		  else if ($angle==90) { $coords[2]=$coords[0]; $coords[3]=1; if ($coords[1]==1) $coords[3]=2; else $coords[3]=1; }
		  else if ($angle==180) { if ($coords[4]==0) $coords[2]=-1; else $coords[2]=0; $coords[3]=$coords[1]; }
		  else if ($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; 
			}
			else if ($angle <=180) { 
				if ($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;
			}
			else if ($angle <=270) { 
				if ($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; 

			}
		  }
		}

		// -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)
		else if ($angle!==false && $coords[0]===false && $coords[1]===false) {
		  if ($angle==0 || $angle==360) { $coords[0]=0; $coords[1]=0; $coords[2]=1; $coords[3]=0; }
		  else if ($angle==90) { $coords[0]=0; $coords[1]=0; $coords[2]=0; $coords[3]=1; }
		  else if ($angle==180) { $coords[0]=1; $coords[1]=0; $coords[2]=0; $coords[3]=0; }
		  else if ($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)); $endy=1; }
			}
			else if ($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)); }
			}
			else if ($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] = $y1; }
			else if ($angle <=180) { $coords[2] = 1-$x1; $coords[3] = $y1; }
			else if ($angle <=270) { $coords[2] = 1-$x1; $coords[3] = 1-$y1; }
			else { $coords[2] = $x1; $coords[3] = 1-$y1; }
		  }
		}
		// -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)
		else if ((!isset($angle) || $angle===false) && $coords[0]!==false && $coords[1]!==false) { 	// should have start and end 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) { $angle += 360; }
		  else if ($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;
		    }
		  }
		}

		// -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.
		else {	// default values T2B
			// All values are set in parseMozGradient - so won't appear here
			$coords = array(0,0,1,0);	// default for original linear gradient (L2R)
		}
		$s = ' q';
		$s .= sprintf(' %.3F %.3F %.3F %.3F re W n', $x*_MPDFK, ($this->mpdf->h-$y)*_MPDFK, $w*_MPDFK, -$h*_MPDFK)."\n";
		$s .= sprintf(' %.3F 0 0 %.3F %.3F %.3F cm', $usew*_MPDFK, $useh*_MPDFK, $usex*_MPDFK, ($this->mpdf->h-($usey+$useh))*_MPDFK)."\n";
	}

	// RADIAL
	else if ($type == 3) { 
		$radius = $coords[4];
		$angle = $coords[5];	// ?? no effect
		$shape = $coords[6];
		$size = $coords[7];
		$repeat = $coords[8];
		// ALL POINTS AND RADIUS SET (default for custom mPDF radial gradient) - no -moz
		if ($coords[0]!==false && $coords[1]!==false && $coords[2]!==false && $coords[3]!==false && $coords[4]!==false) {
			// do nothing - coords used as they are
		}
		// If a <point> is defined
		else if ($shape!==false && $size!==false) {
		   if ($coords[2]==false) { $coords[2] = $coords[0]; }
		   if ($coords[3]==false) { $coords[3] = $coords[1]; }
		   // ELLIPSE
		   if ($shape=='ellipse') {
			$corner1 = sqrt(pow($coords[0],2) + pow($coords[1],2));
			$corner2 = sqrt(pow($coords[0],2) + pow((1-$coords[1]),2));
			$corner3 = sqrt(pow((1-$coords[0]),2) + pow($coords[1],2));
			$corner4 = sqrt(pow((1-$coords[0]),2) + pow((1-$coords[1]),2));
			if ($size=='closest-side') { $radius = min($coords[0], $coords[1], (1-$coords[0]), (1-$coords[1])); }
			else if ($size=='closest-corner') { $radius = min($corner1, $corner2, $corner3, $corner4); }
			else if ($size=='farthest-side') { $radius = max($coords[0], $coords[1], (1-$coords[0]), (1-$coords[1])); }
			else { $radius = max($corner1, $corner2, $corner3, $corner4); }	// farthest corner (default)
		   }
		   // CIRCLE
		   else if ($shape=='circle') {
		    if ($w >= $h) {
			$coords[1] = $coords[3] = ($coords[1] * $h/$w) ;
			$corner1 = sqrt(pow($coords[0],2) + pow($coords[1],2));
			$corner2 = sqrt(pow($coords[0],2) + pow((($h/$w)-$coords[1]),2));
			$corner3 = sqrt(pow((1-$coords[0]),2) + pow($coords[1],2));
			$corner4 = sqrt(pow((1-$coords[0]),2) + pow((($h/$w)-$coords[1]),2));
			if ($size=='closest-side') { $radius = min($coords[0], $coords[1], (1-$coords[0]), (($h/$w)-$coords[1])); }
			else if ($size=='closest-corner') { $radius = min($corner1, $corner2, $corner3, $corner4); }
			else if ($size=='farthest-side') { $radius = max($coords[0], $coords[1], (1-$coords[0]), (($h/$w)-$coords[1])); }
			else if ($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) ;
			$corner1 = sqrt(pow($coords[0],2) + pow($coords[1],2));
			$corner2 = sqrt(pow($coords[0],2) + pow((1-$coords[1]),2));
			$corner3 = sqrt(pow((($w/$h)-$coords[0]),2) + pow($coords[1],2));
			$corner4 = sqrt(pow((($w/$h)-$coords[0]),2) + pow((1-$coords[1]),2));
			if ($size=='closest-side') { $radius = min($coords[0], $coords[1], (($w/$h)-$coords[0]), (1-$coords[1])); }
			else if ($size=='closest-corner') { $radius = min($corner1, $corner2, $corner3, $corner4); }
			else if ($size=='farthest-side') { $radius = max($coords[0], $coords[1], (($w/$h)-$coords[0]), (1-$coords[1])); }
			else if ($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; 
		}

		// -moz If entire function consists of only <stop> values
		else {	// default values 
			// All values are set in parseMozGradient - so won't appear here
			$coords = array(0.5,0.5,0.5,0.5);	// default for radial gradient (centred)
		}
		$s = ' q';
		$s .= sprintf(' %.3F %.3F %.3F %.3F re W n', $x*_MPDFK, ($this->mpdf->h-$y)*_MPDFK, $w*_MPDFK, -$h*_MPDFK)."\n";
		$s .= sprintf(' %.3F 0 0 %.3F %.3F %.3F cm', $usew*_MPDFK, $useh*_MPDFK, $usex*_MPDFK, ($this->mpdf->h-($usey+$useh))*_MPDFK)."\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==2) {
		$axisx = ($coords[2]-$coords[0])*$usew;
		$axisy = ($coords[3]-$coords[1])*$useh;
		$axis_length = sqrt(pow($axisx,2) + pow($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 = $this->mpdf->ConvertSize($m[1],$this->mpdf->w,$this->mpdf->FontSize,false);
		$stops[$i]['offset'] = $tmp/$axis_length;
	  }
	}


	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[$i]['col']{4})/100));
		}
		else if ($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; } 
		else if ($stops[$i]['opacity'] > 1 || $stops[$i]['opacity'] < 0) { $stops[$i]['opacity'] = 1; } 
		else if ($stops[$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'];
		$this->mpdf->gradients[$n]['stops'][$i]['offset'] = $stops[$i]['offset'];
	}

	if ($repeat) {
		$ns = count($this->mpdf->gradients[$n]['stops']);
		$offs = array();
		for($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(2);
			}
		   }
		}
	}

	if ($trans) { 
		$this->mpdf->gradients[$n]['trans'] = true;	
		$s .= ' /TGS'.$n.' gs ';
	}
	if (!is_array($extend) || count($extend) <1) { 
		$extend=array('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; }
	else { $this->mpdf->_out($s); }
}


function parseMozGradient($bg) {
   //	background[-image]: -moz-linear-gradient(left, #c7Fdde 20%, #FF0000 ); 
   //	background[-image]: linear-gradient(left, #c7Fdde 20%, #FF0000 ); // CSS3
   if (preg_match('/repeating-/',$bg)) { $repeat = true; }
   else { $repeat = false; }
   if (preg_match('/linear-gradient\((.*)\)/',$bg,$m)) {
	$g = array();
	$g['type'] = 2;
	$g['colorspace'] = 'RGB';
	$g['extend'] = array('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])) {
		$startStops = 1; 
	}
	else if (trim($first[(count($first)-1)]) === "0") {
		$startStops = 1;
	}
	else {
		$check = $this->mpdf->ConvertColor($first[0]);
		if ($check) $startStops = 0; 
		else $startStops = 1; 
	}
	// first part a valid point/angle?
	if ($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])=='deg') { $angle = $angle; }
			else if (strtolower($m[2])=='grad') { $angle *= (360/400); }
			else if (strtolower($m[2])=='rad') { $angle = rad2deg($angle); }
			while($angle < 0) { $angle += 360; }
			$angle = ($angle % 360);
		}
		else if (trim($first[(count($first)-1)]) === "0") { $angle = 0; }
		if (preg_match('/left/i',$bgr[0])) { $startx = 0; }
		else if (preg_match('/right/i',$bgr[0])) { $startx = 1; }
		if (preg_match('/top/i',$bgr[0])) { $starty = 1; }
		else if (preg_match('/bottom/i',$bgr[0])) { $starty = 0; }
		// Check for %? ?% or %%
		if (preg_match('/(\d+)[%]/i',$first[0],$m)) { $startx = $m[1]/100; }
		else if (!isset($startx) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$first[0],$m)) { 
			$tmp = $this->mpdf->ConvertSize($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); }
		else if (!isset($starty) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$first[1],$m)) { 
			$tmp = $this->mpdf->ConvertSize($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; }

	}
	// 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.
	else {	// default values T2B
		$starty = 1; $startx = 0.5;
		$endy = 0; $endx = 0.5;
	}
	$coords = array();
	if (!isset($startx)) { $startx = false; }
	if (!isset($starty)) { $starty = false; }
	if (!isset($endx)) { $endx = false; }
	if (!isset($endy)) { $endy = false; }
	if (!isset($angle)) { $angle = false; }
	$g['coords'] = array($startx ,$starty ,$endx ,$endy, $angle, $repeat );
	$g['stops'] = array();
	for($i=$startStops;$i<count($bgr);$i++) {
		$stop = array();
		// parse stops
		$el = preg_split('/\s+/',trim($bgr[$i]));
		// mPDF 5.3.74
		$col = $this->mpdf->ConvertColor($el[0]);
		if ($col) { $stop['col'] = $col; }
		else { $stop['col'] = $col = $this->mpdf->ConvertColor(255); }
		if ($col{0}==1) $g['colorspace'] = 'Gray';
		else if ($col{0}==4 || $col{0}==6) $g['colorspace'] = 'CMYK';
		if ($col{0}==5) { $stop['opacity'] = ord($col{4})/100; }	// transparency from rgba()
		else if ($col{0}==6) { $stop['opacity'] = ord($col{5})/100; }	// transparency from cmyka()
		else if ($col{0}==1 && $col{2}==1) { $stop['opacity'] = ord($col{3})/100; }	// transparency converted from rgba or cmyka()

		if (isset($el[1]) && preg_match('/(\d+)[%]/',$el[1],$m)) { 
			$stop['offset'] = $m[1]/100;
			if ($stop['offset']>1) { unset($stop['offset']); }
		}
		else if (isset($el[1]) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$el[1],$m)) { 
			$tmp = $this->mpdf->ConvertSize($m[1],$this->mpdf->w,$this->mpdf->FontSize,false);
			if ($tmp) { $stop['offset'] = $m[1]; }
		}
		$g['stops'][] = $stop;
	}
	if (count($g['stops'] )) { return $g; }
   }
   else if (preg_match('/radial-gradient\((.*)\)/',$bg,$m)) {
	$g = array();
	$g['type'] = 3;
	$g['colorspace'] = 'RGB';
	$g['extend'] = array('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 = $this->mpdf->ConvertColor($first[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; 
		$pos_angle = $bgr[0];
	}
	else if (trim($first[(count($first)-1)]) === "0") {
		$startStops=1;
		$pos_angle = $bgr[0];
	}
	else if (preg_match('/(circle|ellipse|closest-side|closest-corner|farthest-side|farthest-corner|contain|cover)/i',$bgr[0])) {
		$startStops=1; 
		$shape_size = $bgr[0];
	}
	else if (!$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 ($pos_angle) {	// default values
		// [<point> || <angle>,] = [<% em px left center right bottom top> || <deg grad rad 0>,]
		if (preg_match('/left/i',$pos_angle)) { $startx = 0; }
		else if (preg_match('/right/i',$pos_angle)) { $startx = 1; }
		if (preg_match('/top/i',$pos_angle)) { $starty = 1; }
		else if (preg_match('/bottom/i',$pos_angle)) { $starty = 0; }
		// Check for %? ?% or %%
		if (preg_match('/(\d+)[%]/i',$first[0],$m)) { $startx = $m[1]/100; }
		else if (!isset($startx) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$first[0],$m)) { 
			$tmp = $this->mpdf->ConvertSize($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); }
		else if (!isset($starty) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$first[1],$m)) { 
			$tmp = $this->mpdf->ConvertSize($m[1],$this->mpdf->w,$this->mpdf->FontSize,false);
			if ($tmp) { $starty = $m[1]; }
		}

/*
		// ?? Angle has no effect in radial gradient (does not exist in CSS3 spec.)
		if (preg_match('/([\-]*[0-9\.]+)(deg|grad|rad)/i',$pos_angle,$m)) {
			$angle = $m[1] + 0;
			if (strtolower($m[2])=='deg') { $angle = $angle; }
			else if (strtolower($m[2])=='grad') { $angle *= (360/400); }
			else if (strtolower($m[2])=='rad') { $angle = rad2deg($angle); }
			while($angle < 0) { $angle += 360; }
			$angle = ($angle % 360);
		}
*/
		if (!isset($starty)) { $starty = 0.5; }
		if (!isset($startx)) { $startx = 0.5; }

	}
	// 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.
	else {	// 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') { $size = 'closest-side'; }
			else if ($size=='cover') { $size = 'farthest-corner'; }
		}
	}

	$coords = array();
	if (!isset($startx)) { $startx = false; }
	if (!isset($starty)) { $starty = false; }
	if (!isset($endx)) { $endx = false; }
	if (!isset($endy)) { $endy = false; }
	if (!isset($radius)) { $radius = false; }
	if (!isset($angle)) { $angle = 0; }
	$g['coords'] = array($startx ,$starty ,$endx ,$endy, $radius, $angle, $shape, $size, $repeat );

	$g['stops'] = array();
	for($i=$startStops;$i<count($bgr);$i++) {
		$stop = array();
		// parse stops
		$el = preg_split('/\s+/',trim($bgr[$i]));
		// mPDF 5.3.74
		$col = $this->mpdf->ConvertColor($el[0]);
		if ($col) { $stop['col'] = $col; }
		else { $stop['col'] = $col = $this->mpdf->ConvertColor(255); }
		if ($col{0}==1) $g['colorspace'] = 'Gray';
		else if ($col{0}==4 || $col{0}==6) $g['colorspace'] = 'CMYK';
		if ($col{0}==5) { $stop['opacity'] = ord($col{4})/100; }	// transparency from rgba()
		else if ($col{0}==6) { $stop['opacity'] = ord($col{5})/100; }	// transparency from cmyka()
		else if ($col{0}==1 && $col{2}==1) { $stop['opacity'] = ord($col{3})/100; }	// transparency converted from rgba or cmyka()

		if (isset($el[1]) && preg_match('/(\d+)[%]/',$el[1],$m)) { 
			$stop['offset'] = $m[1]/100;
			if ($stop['offset']>1) { unset($stop['offset']); }
		}
		else if (isset($el[1]) && preg_match('/([0-9.]+(px|em|ex|pc|pt|cm|mm|in))/i',$el[1],$m)) { 
			$tmp = $this->mpdf->ConvertSize($m[1],$this->mpdf->w,$this->mpdf->FontSize,false);
			$stop['offset'] = $el[1];
		}
		$g['stops'][] = $stop;
	}
	if (count($g['stops'] )) { return $g; }
   }
   return array();
} 

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);
	$g = array();
	if (count($bgr)> 6) {  
		if (strtoupper(substr($bgr[0],0,1)) == 'L' && count($bgr)==7) {  // linear
			$g['type'] = 2;
			//$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).
			$g['coords'] = array($bgr[3], $bgr[4], $bgr[5], $bgr[6]);
		}
		else if (count($bgr)==8) {	// radial
			$g['type'] = 3;
			// 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
			$g['coords'] = array($bgr[3], $bgr[4], $bgr[5], $bgr[6], $bgr[7]);
		}
		$g['colorspace'] = 'RGB';
		// mPDF 5.3.74
		$cor = $this->mpdf->ConvertColor($bgr[1]);
		if ($cor{0}==1) $g['colorspace'] = 'Gray';
		else if ($cor{0}==4 || $cor{0}==6) $g['colorspace'] = 'CMYK';
		if ($cor) { $g['col'] = $cor; }
		else { $g['col'] = $this->mpdf->ConvertColor(255); }
		$cor = $this->mpdf->ConvertColor($bgr[2]);
		if ($cor) { $g['col2'] = $cor; }
		else { $g['col2'] = $this->mpdf->ConvertColor(255); }
		$g['extend'] = array('true','true');
		$g['stops'] = array(array('col'=>$g['col'], 'opacity'=>1, 'offset'=>0), array('col'=>$g['col2'], 'opacity'=>1, 'offset'=>1));
		return $g;
	}
	return false;
}



}

?>

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