Pimcore\Image\Adapter\Imagick::hasAlphaChannel PHP Méthode

    protected function hasAlphaChannel()
    {
        if ($this->isAlphaPossible) {
            $width = $this->resource->getImageWidth();
            // Get the width of the image
            $height = $this->resource->getImageHeight();
            // Get the height of the image
            // We run the image pixel by pixel and as soon as we find a transparent pixel we stop and return true.
            for ($i = 0; $i < $width; $i++) {
                for ($j = 0; $j < $height; $j++) {
                    $pixel = $this->resource->getImagePixelColor($i, $j);
                    $color = $pixel->getColor(true);
                    // get the real alpha not just 1/0
                    if ($color["a"] < 1) {
                        // if there's an alpha pixel, return true
                        return true;
                    }
                }
            }
        }
        // If we dont find any pixel the function will return false.
        return false;
    }