Image.php

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<?php
namespace Magento\Framework;

class Image
{
    protected $_adapter;

    protected $_fileName;

    public function __construct(\Magento\Framework\Image\Adapter\AdapterInterface $adapter, $fileName = null)
    {
        $this->_adapter = $adapter;
        $this->_fileName = $fileName;
        if (isset($fileName)) {
            $this->open();
        }
    }

    public function open()
    {
        $this->_adapter->checkDependencies();

        if (!file_exists($this->_fileName)) {
            throw new \Exception("File '{$this->_fileName}' does not exist.");
        }

        $this->_adapter->open($this->_fileName);
    }

    public function display()
    {
        $this->_adapter->display();
    }

    public function save($destination = null, $newFileName = null)
    {
        $this->_adapter->save($destination, $newFileName);
    }

    public function rotate($angle)
    {
        $this->_adapter->rotate($angle);
    }

    public function crop($top = 0, $left = 0, $right = 0, $bottom = 0)
    {
        $this->_adapter->crop($top, $left, $right, $bottom);
    }

    public function resize($width, $height = null)
    {
        $this->_adapter->resize($width, $height);
    }

    public function keepAspectRatio($value)
    {
        return $this->_adapter->keepAspectRatio($value);
    }

    public function keepFrame($value)
    {
        return $this->_adapter->keepFrame($value);
    }

    public function keepTransparency($value)
    {
        return $this->_adapter->keepTransparency($value);
    }

    public function constrainOnly($value)
    {
        return $this->_adapter->constrainOnly($value);
    }

    public function backgroundColor($value)
    {
        return $this->_adapter->backgroundColor($value);
    }

    public function quality($value)
    {
        return $this->_adapter->quality($value);
    }

    public function watermark(
        $watermarkImage,
        $positionX = 0,
        $positionY = 0,
        $watermarkImageOpacity = 30,
        $repeat = false
    ) {
        if (!file_exists($watermarkImage)) {
            throw new \Exception("Required file '{$watermarkImage}' does not exists.");
        }
        $this->_adapter->watermark($watermarkImage, $positionX, $positionY, $watermarkImageOpacity, $repeat);
    }

    public function getMimeType()
    {
        return $this->_adapter->getMimeType();
    }

    public function getImageType()
    {
        return $this->_adapter->getImageType();
    }

    public function process()
    {
    }

    public function instruction()
    {
    }

    public function setImageBackgroundColor($color)
    {
        $this->_adapter->imageBackgroundColor = intval($color);
    }

    public function setWatermarkPosition($position)
    {
        $this->_adapter->setWatermarkPosition($position);
        return $this;
    }

    public function setWatermarkImageOpacity($imageOpacity)
    {
        $this->_adapter->setWatermarkImageOpacity($imageOpacity);
        return $this;
    }

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

    public function setWatermarkHeight($height)
    {
        $this->_adapter->setWatermarkHeight($height);
        return $this;
    }

    public function getOriginalWidth()
    {
        return $this->_adapter->getOriginalWidth();
    }

    public function getOriginalHeight()
    {
        return $this->_adapter->getOriginalHeight();
    }

    public function createPngFromString($text, $font = '')
    {
        $this->_adapter->createPngFromString($text, $font);
        return $this;
    }
}