chillerlan\QRCode\Data\QRMatrix::setLogoSpace()

Complexity

Conditions	20
Paths	141

Size

Total Lines	64
Code Lines	28

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	0	Features	0

<?php
	public function setLogoSpace(int $width, int $height = null, int $startX = null, int $startY = null):self{

		// for logos, we operate in ECC H (30%) only
		if($this->eccLevel->getLevel() !== EccLevel::H){
			throw new QRCodeDataException('ECC level "H" required to add logo space');
		}

		if($height === null){
			$height = $width;
		}

		// if width and height happen to be negative or 0 (default value), just return - nothing to do
		if($width <= 0 || $height <= 0){
			return $this; // @codeCoverageIgnore
		}

		// $this->moduleCount includes the quiet zone (if created), we need the QR size here
		$length = $this->version->getDimension();

		// throw if the size is exceeds the qrcode size
		if($width > $length || $height > $length){
			throw new QRCodeDataException('logo dimensions exceed matrix size');
		}

		// we need uneven sizes to center the logo space, adjust if needed
		if($startX === null && ($width % 2) === 0){
			$width++;
		}

		if($startY === null && ($height % 2) === 0){
			$height++;
		}

		// throw if the logo space exceeds the maximum error correction capacity
		if(($width * $height) > floor($length * $length * 0.2)){
			throw new QRCodeDataException('logo space exceeds the maximum error correction capacity');
		}

		// quiet zone size
		$qz    = (($this->moduleCount - $length) / 2);
		// skip quiet zone and the first 9 rows/columns (finder-, mode-, version- and timing patterns)
		$start = ($qz + 9);
		// skip quiet zone
		$end   = ($this->moduleCount - $qz);

		// determine start coordinates
		$startX = ((($startX !== null) ? $startX : ($length - $width) / 2) + $qz);
		$startY = ((($startY !== null) ? $startY : ($length - $height) / 2) + $qz);
		$endX   = ($startX + $width);
		$endY   = ($startY + $height);

		// clear the space
		for($y = $startY; $y < $endY; $y++){
			for($x = $startX; $x < $endX; $x++){
				// out of bounds, skip
				if($x < $start || $y < $start ||$x >= $end || $y >= $end){
					continue;
				}

				$this->set($x, $y, false, $this::M_LOGO);
			}
		}

		return $this;
	}