Watermark.php

<?php
namespace Bitrix\Main\File\Image;
 
class Watermark
{
    const
        ALIGN_LEFT = "left",
        ALIGN_CENTER = "center",
        ALIGN_RIGHT = "right",
        ALIGN_TOP = "top",
        ALIGN_BOTTOM = "bottom";
 
    const
        SIZE_SMALL = "small",
        SIZE_MEDIUM = "medium",
        SIZE_BIG = "big";
 
    protected
        $hAlign = self::ALIGN_RIGHT,
        $vAlign = self::ALIGN_BOTTOM,
        $size = self::SIZE_MEDIUM,
        $padding = 0,
        $ratio;
 
    public function __construct()
    {
    }
 
    public function setAlignment($hAlign, $vAlign)
    {
        $this->hAlign = $hAlign;
        $this->vAlign = $vAlign;
        return $this;
    }
 
    public function getRatio()
    {
        return $this->ratio;
    }
 
    public function alignPosition($width, $height, Rectangle $position)
    {
        $padding = $this->padding;
 
        if($this->vAlign == static::ALIGN_CENTER)
        {
            $position->setY(($height - $position->getHeight()) / 2);
        }
        elseif($this->vAlign == static::ALIGN_BOTTOM)
        {
            $position->setY($height - $position->getHeight() - $padding);
        }
        else //static::ALIGN_TOP
        {
            $position->setY($padding);
        }
 
        if($this->hAlign == static::ALIGN_CENTER)
        {
            $position->setX(($width - $position->getWidth()) / 2);
        }
        elseif($this->hAlign == static::ALIGN_RIGHT)
        {
            $position->setX(($width - $position->getWidth()) - $padding);
        }
        else //static::ALIGN_LEFT
        {
            $position->setX($padding);
        }
 
        if($position->getY() < $padding)
        {
            $position->setY($padding);
        }
        if($position->getX() < $padding)
        {
            $position->setX($padding);
        }
    }
 
    public function setRatio($ratio)
    {
        $this->ratio = (float)$ratio;
        return $this;
    }
 
    public function setSize($size)
    {
        $this->size = $size;
        return $this;
    }
 
    public function getVerticalAlignment()
    {
        return $this->vAlign;
    }
 
    public function getHorizontalAlignment()
    {
        return $this->hAlign;
    }
 
    public function getPadding()
    {
        return $this->padding;
    }
 
    public function setPadding($padding)
    {
        $this->padding = (int)$padding;
        return $this;
    }
 
    public static function createFromArray($params)
    {
        $params["position"] = strtolower(trim($params["position"] ?? ''));
        $positions = ["topleft", "topcenter", "topright", "centerleft", "center", "centerright", "bottomleft", "bottomcenter", "bottomright"];
        $shortPositions = ["tl", "tc", "tr", "ml", "mc", "mr", "bl", "bc", "br"];
        $position = ['x' => 'right','y' => 'bottom']; // Default position
 
        if(in_array($params["position"], $shortPositions))
        {
            $params["position"] = str_replace($shortPositions, $positions, $params["position"]);
        }
 
        if(in_array($params["position"], $positions))
        {
            foreach(['top', 'center', 'bottom'] as $k)
            {
                $l = strlen($k);
                if(substr($params["position"], 0, $l) == $k)
                {
                    $position['y'] = $k;
                    $position['x'] = substr($params["position"], $l);
                    if($position['x'] == '')
                    {
                        $position['x'] = ($k == 'center'? 'center' : 'right');
                    }
                }
            }
        }
 
        if(isset($params["type"]) && $params["type"] == "text")
        {
            $watermark = new TextWatermark(
                $params['text'],
                $params['font'],
                Color::createFromHex($params['color'])
            );
 
            if($params["text_width"] > 0)
            {
                $watermark->setWidth($params["text_width"]);
            }
            if($params["use_copyright"] == "Y")
            {
                $watermark->setCopyright(true);
            }
        }
        else
        {
            $watermark = new ImageWatermark($params["file"] ?? null);
 
            if(!isset($params["fill"]) || $params["fill"] <> 'repeat')
            {
                if(!isset($params["fill"]) || $params["fill"] <> 'exact')
                {
                    if(isset($params["size"]) && $params["size"] == "real")
                    {
                        $params["fill"] = 'exact';
                    }
                    else
                    {
                        $params["fill"] = 'resize';
                    }
                }
            }
            else
            {
                $position["x"] = "left";
                $position["y"] = "top";
            }
 
            $watermark->setMode($params["fill"]);
 
            if(isset($params["alpha_level"]))
            {
                $watermark->setAlpha(intval($params["alpha_level"]) / 100);
            }
        }
 
        $watermark->setAlignment($position["x"], $position["y"]);
 
        if(isset($params["padding"]))
        {
            $watermark->setPadding($params["padding"]);
        }
 
        if(isset($params["size"]))
        {
            $watermark->setSize($params["size"]);
        }
 
        if(isset($params["coefficient"]))
        {
            $watermark->setRatio($params["coefficient"]);
        }
 
        return $watermark;
    }
}