TextWatermark.php

См. документацию.

<?php
 
namespace Bitrix\Main\File\Image;
 
use Bitrix\Main;
 
class TextWatermark extends Watermark
{
    protected
        $text,
        $width,
        $font,
        $color,
        $copyright = false,
        $padding = 5;

    public function __construct($text, $font, Color $color = null)
    {
        parent::__construct();
 
        $this->text = $text;
        $this->font = $font;
 
        if($color !== null)
        {
            $this->color = $color;
        }
        else
        {
            $this->color = new Color();
        }
    }

    public function getText()
    {
        return ($this->copyright? chr(169)." " : "").$this->text;
    }

    public function getUtfText()
    {
        $text = $this->getText();
 
        $culture = Main\Context::getCurrent()->getCulture();
        if($culture)
        {
            $text = Main\Text\Encoding::convertEncoding($text, $culture->getCharset(), "UTF-8");
        }
 
        return $text;
    }

    public function setText($text)
    {
        $this->text = $text;
        return $this;
    }

    public function getWidth()
    {
        return $this->width;
    }

    public function setWidth($width)
    {
        $this->width = (int)$width;
        return $this;
    }

    public function getFont()
    {
        return $this->font;
    }

    public function setFont($font)
    {
        $this->font = $font;
        return $this;
    }

    public function getColor(): Color
    {
        return $this->color;
    }

    public function setColor(Color $color)
    {
        $this->color = $color;
        return $this;
    }

    public function isCopyright()
    {
        return $this->copyright;
    }

    public function setCopyright($copyright)
    {
        $this->copyright = (bool)$copyright;
        return $this;
    }

    public function getRatio()
    {
        if($this->ratio === null)
        {
            if($this->size == static::SIZE_BIG)
            {
                return 7;
            }
            if($this->size == static::SIZE_SMALL)
            {
                return 2;
            }
            //static::SIZE_MEDIUM
            return 4;
        }
        return $this->ratio;
    }

    public function getFontSize($width)
    {
        $length = mb_strlen($this->getText());
 
        $fontSize = $width * ($this->getRatio() / 100.0);
 
        if(($fontSize * $length * 0.7) > $width)
        {
            $fontSize = $width / ($length * 0.7);
        }
 
        return $fontSize;
    }
}