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<?php
declare(strict_types = 1);
namespace BaconQrCode\Renderer\Module;
use BaconQrCode\Encoder\ByteMatrix;
use BaconQrCode\Exception\InvalidArgumentException;
use BaconQrCode\Renderer\Path\Path;
/**
* Renders individual modules as dots.
*/
final class DotsModule implements ModuleInterface
{
public const LARGE = 1;
public const MEDIUM = .8;
public const SMALL = .6;
/**
* @var float
*/
private $size;
public function __construct(float $size)
{
if ($size <= 0 || $size > 1) {
throw new InvalidArgumentException('Size must between 0 (exclusive) and 1 (inclusive)');
}
$this->size = $size;
}
public function createPath(ByteMatrix $matrix) : Path
{
$width = $matrix->getWidth();
$height = $matrix->getHeight();
$path = new Path();
$halfSize = $this->size / 2;
$margin = (1 - $this->size) / 2;
for ($y = 0; $y < $height; ++$y) {
for ($x = 0; $x < $width; ++$x) {
if (! $matrix->get($x, $y)) {
continue;
}
$pathX = $x + $margin;
$pathY = $y + $margin;
$path = $path
->move($pathX + $this->size, $pathY + $halfSize)
->ellipticArc($halfSize, $halfSize, 0, false, true, $pathX + $halfSize, $pathY + $this->size)
->ellipticArc($halfSize, $halfSize, 0, false, true, $pathX, $pathY + $halfSize)
->ellipticArc($halfSize, $halfSize, 0, false, true, $pathX + $halfSize, $pathY)
->ellipticArc($halfSize, $halfSize, 0, false, true, $pathX + $this->size, $pathY + $halfSize)
->close()
;
}
}
return $path;
}
}
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