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<?php |
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namespace WCPOS\Vendor\Picqer\Barcode; |
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|
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use Imagick; |
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use imagickdraw; |
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use imagickpixel; |
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use WCPOS\Vendor\Picqer\Barcode\Exceptions\BarcodeException; |
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class BarcodeGeneratorPNG extends BarcodeGenerator |
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{ |
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protected $useImagick = \true; |
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/** |
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* @throws BarcodeException |
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*/ |
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public function __construct() |
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{ |
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// Auto switch between GD and Imagick based on what is installed |
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if (\extension_loaded('imagick')) { |
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$this->useImagick = \true; |
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} elseif (\function_exists('imagecreate')) { |
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$this->useImagick = \false; |
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} else { |
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throw new BarcodeException('Neither gd-lib or imagick are installed!'); |
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} |
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} |
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/** |
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* Force the use of Imagick image extension |
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*/ |
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public function useImagick() |
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{ |
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$this->useImagick = \true; |
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} |
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/** |
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* Force the use of the GD image library |
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*/ |
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public function useGd() |
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{ |
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$this->useImagick = \false; |
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} |
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/** |
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* Return a PNG image representation of barcode (requires GD or Imagick library). |
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* |
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* @param string $barcode code to print |
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* @param BarcodeGenerator::TYPE_* $type (string) type of barcode |
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* @param int $widthFactor Width of a single bar element in pixels. |
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* @param int $height Height of a single bar element in pixels. |
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* @param array $foregroundColor RGB (0-255) foreground color for bar elements (background is transparent). |
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* @return string image data or false in case of error. |
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*/ |
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public function getBarcode(string $barcode, $type, int $widthFactor = 2, int $height = 30, array $foregroundColor = [0, 0, 0]) : string |
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{ |
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$barcodeData = $this->getBarcodeData($barcode, $type); |
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$width = \round($barcodeData->getWidth() * $widthFactor); |
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if ($this->useImagick) { |
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$imagickBarsShape = new imagickdraw(); |
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$imagickBarsShape->setFillColor(new imagickpixel('rgb(' . \implode(',', $foregroundColor) . ')')); |
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} else { |
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$image = $this->createGdImageObject($width, $height); |
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$gdForegroundColor = \imagecolorallocate($image, $foregroundColor[0], $foregroundColor[1], $foregroundColor[2]); |
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} |
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// print bars |
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$positionHorizontal = 0; |
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/** @var BarcodeBar $bar */ |
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foreach ($barcodeData->getBars() as $bar) { |
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$barWidth = \round($bar->getWidth() * $widthFactor, 3); |
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if ($bar->isBar() && $barWidth > 0) { |
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$y = \round($bar->getPositionVertical() * $height / $barcodeData->getHeight(), 3); |
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$barHeight = \round($bar->getHeight() * $height / $barcodeData->getHeight(), 3); |
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// draw a vertical bar |
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if ($this->useImagick) { |
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$imagickBarsShape->rectangle($positionHorizontal, $y, $positionHorizontal + $barWidth - 1, $y + $barHeight); |
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} else { |
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\imagefilledrectangle($image, $positionHorizontal, $y, $positionHorizontal + $barWidth - 1, $y + $barHeight, $gdForegroundColor); |
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} |
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} |
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$positionHorizontal += $barWidth; |
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} |
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if ($this->useImagick) { |
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$image = $this->createImagickImageObject($width, $height); |
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$image->drawImage($imagickBarsShape); |
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return $image->getImageBlob(); |
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} |
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\ob_start(); |
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$this->generateGdImage($image); |
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return \ob_get_clean(); |
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} |
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protected function createGdImageObject(int $width, int $height) |
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{ |
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$image = \imagecreate($width, $height); |
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$colorBackground = \imagecolorallocate($image, 255, 255, 255); |
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\imagecolortransparent($image, $colorBackground); |
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return $image; |
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} |
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protected function createImagickImageObject(int $width, int $height) : Imagick |
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{ |
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$image = new Imagick(); |
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$image->newImage($width, $height, 'none', 'PNG'); |
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return $image; |
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} |
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protected function generateGdImage($image) |
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{ |
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\imagepng($image); |
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\imagedestroy($image); |
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} |
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} |
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