Mike42\Escpos\ImagickEscposImage::readImageFromImagick PHP 메소드

    public function readImageFromImagick(\Imagick $im)
    {
        /* Strip transparency */
        $im = self::alphaRemove($im);
        /* Threshold */
        $im->setImageType(\Imagick::IMGTYPE_TRUECOLOR);
        // Remove transparency (good for PDF's)
        $max = $im->getQuantumRange();
        $max = $max["quantumRangeLong"];
        $im->thresholdImage(0.5 * $max);
        /* Make a string of 1's and 0's */
        $imgHeight = $im->getimageheight();
        $imgWidth = $im->getimagewidth();
        $imgData = str_repeat("", $imgHeight * $imgWidth);
        for ($y = 0; $y < $imgHeight; $y++) {
            for ($x = 0; $x < $imgWidth; $x++) {
                /* Faster to average channels, blend alpha and negate the image here than via filters (tested!) */
                $cols = $im->getImagePixelColor($x, $y);
                $cols = $cols->getcolor();
                $greyness = (int) (($cols['r'] + $cols['g'] + $cols['b']) / 3) >> 7;
                // 1 for white, 0 for black
                $imgData[$y * $imgWidth + $x] = 1 - $greyness;
                // 1 for black, 0 for white
            }
        }
        $this->setImgWidth($imgWidth);
        $this->setImgHeight($imgHeight);
        $this->setImgData($imgData);
    }

 public function writeText($text)
 {
     if ($this->printer == null) {
         throw new LogicException("Not attached to a printer.");
     }
     if ($text == null) {
         return;
     }
     $text = trim($text, "\n");
     /* Create Imagick objects */
     $image = new \Imagick();
     $draw = new \ImagickDraw();
     $color = new \ImagickPixel('#000000');
     $background = new \ImagickPixel('white');
     /* Create annotation */
     if ($this->font !== null) {
         // Allow fallback on defaults as necessary
         $draw->setFont($this->font);
     }
     /* In Arial, size 21 looks good as a substitute for FONT_B, 24 for FONT_A */
     $draw->setFontSize($this->fontSize);
     $draw->setFillColor($color);
     $draw->setStrokeAntialias(true);
     $draw->setTextAntialias(true);
     $metrics = $image->queryFontMetrics($draw, $text);
     $draw->annotation(0, $metrics['ascender'], $text);
     /* Create image & draw annotation on it */
     $image->newImage($metrics['textWidth'], $metrics['textHeight'], $background);
     $image->setImageFormat('png');
     $image->drawImage($draw);
     // debugging if you want to view the images yourself
     //$image -> writeImage("test.png");
     /* Save image */
     $escposImage = new ImagickEscposImage();
     $escposImage->readImageFromImagick($image);
     $size = Printer::IMG_DEFAULT;
     $this->printer->bitImage($escposImage, $size);
 }