76 lines
2.9 KiB
PHP
76 lines
2.9 KiB
PHP
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<?php
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namespace Picqer\Barcode;
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use Picqer\Barcode\Exceptions\BarcodeException;
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class BarcodeGeneratorPNG extends BarcodeGenerator
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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 $code code to print
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* @param string $type type of barcode:
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* @param int $widthFactor Width of a single bar element in pixels.
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* @param int $totalHeight Height of a single bar element in pixels.
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* @param array $color RGB (0-255) foreground color for bar elements (background is transparent).
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* @return string image data or false in case of error.
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* @public
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*/
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public function getBarcode($code, $type, $widthFactor = 2, $totalHeight = 30, $color = array(0, 0, 0))
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{
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$barcodeData = $this->getBarcodeData($code, $type);
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// calculate image size
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$width = ($barcodeData['maxWidth'] * $widthFactor);
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$height = $totalHeight;
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if (function_exists('imagecreate')) {
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// GD library
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$imagick = false;
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$png = imagecreate($width, $height);
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$colorBackground = imagecolorallocate($png, 255, 255, 255);
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imagecolortransparent($png, $colorBackground);
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$colorForeground = imagecolorallocate($png, $color[0], $color[1], $color[2]);
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} elseif (extension_loaded('imagick')) {
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$imagick = true;
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$colorForeground = new \imagickpixel('rgb(' . $color[0] . ',' . $color[1] . ',' . $color[2] . ')');
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$png = new \Imagick();
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$png->newImage($width, $height, 'none', 'png');
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$imageMagickObject = new \imagickdraw();
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$imageMagickObject->setFillColor($colorForeground);
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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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// print bars
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$positionHorizontal = 0;
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foreach ($barcodeData['bars'] as $bar) {
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$bw = round(($bar['width'] * $widthFactor), 3);
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$bh = round(($bar['height'] * $totalHeight / $barcodeData['maxHeight']), 3);
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if ($bar['drawBar']) {
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$y = round(($bar['positionVertical'] * $totalHeight / $barcodeData['maxHeight']), 3);
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// draw a vertical bar
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if ($imagick && isset($imageMagickObject)) {
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$imageMagickObject->rectangle($positionHorizontal, $y, ($positionHorizontal + $bw), ($y + $bh));
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} else {
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imagefilledrectangle($png, $positionHorizontal, $y, ($positionHorizontal + $bw) - 1, ($y + $bh),
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$colorForeground);
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}
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}
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$positionHorizontal += $bw;
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}
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ob_start();
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if ($imagick && isset($imageMagickObject)) {
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$png->drawImage($imageMagickObject);
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echo $png;
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} else {
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imagepng($png);
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imagedestroy($png);
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}
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$image = ob_get_clean();
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return $image;
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}
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}
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