phpengine/src/Picqer/Barcode/BarcodeGeneratorJPG.php

<?php

namespace Picqer\Barcode;

use Picqer\Barcode\Exceptions\BarcodeException;

class BarcodeGeneratorJPG extends BarcodeGenerator
{

	/**
	 * Return a JPG image representation of barcode (requires GD or Imagick library).
	 *
	 * @param string $code code to print
	 * @param string $type type of barcode:
	 * @param int $widthFactor Width of a single bar element in pixels.
	 * @param int $totalHeight Height of a single bar element in pixels.
	 * @param array $color RGB (0-255) foreground color for bar elements (background is transparent).
	 * @return string image data or false in case of error.
	 * @public
	 * @throws BarcodeException
	 */
	public function getBarcode($code, $type, $widthFactor = 2, $totalHeight = 30, $color = array(0, 0, 0))
	{
		$barcodeData = $this->getBarcodeData($code, $type);

		// calculate image size
		$width = ($barcodeData['maxWidth'] * $widthFactor);
		$height = $totalHeight;

		if (function_exists('imagecreate')) {
			// GD library
			$imagick = false;
			$jpg = imagecreate($width, $height);
			$colorBackground = imagecolorallocate($jpg, 255, 255, 255);
			imagecolortransparent($jpg, $colorBackground);
			$colorForeground = imagecolorallocate($jpg, $color[0], $color[1], $color[2]);
		} elseif (extension_loaded('imagick')) {
			$imagick = true;
			$colorForeground = new \imagickpixel('rgb(' . $color[0] . ',' . $color[1] . ',' . $color[2] . ')');
			$jpg = new \Imagick();
			$jpg->newImage($width, $height, 'none', 'jpg');
			$imageMagickObject = new \imagickdraw();
			$imageMagickObject->setFillColor($colorForeground);
		} else {
			throw new BarcodeException('Neither gd-lib or imagick are installed!');
		}

		// print bars
		$positionHorizontal = 0;
		foreach($barcodeData['bars'] as $bar) {
			$bw = round(($bar['width'] * $widthFactor), 3);
			$bh = round(($bar['height'] * $totalHeight / $barcodeData['maxHeight']), 3);
			if ($bar['drawBar']) {
				$y = round(($bar['positionVertical'] * $totalHeight / $barcodeData['maxHeight']), 3);
				// draw a vertical bar
				if ($imagick && isset($imageMagickObject)) {
					$imageMagickObject->rectangle($positionHorizontal, $y, ($positionHorizontal + $bw), ($y + $bh));
				} else {
					imagefilledrectangle($jpg, $positionHorizontal, $y, ($positionHorizontal + $bw) - 1, ($y + $bh),
						$colorForeground);
				}
			}
			$positionHorizontal += $bw;
		}
		ob_start();
		if ($imagick && isset($imageMagickObject)) {
			$jpg->drawImage($imageMagickObject);
			echo $jpg;
		} else {
			imagejpeg($jpg);
			imagedestroy($jpg);
		}
		$image = ob_get_clean();

		return $image;
	}
}