130 Zeilen
4.4 KiB
PHP
130 Zeilen
4.4 KiB
PHP
<?php
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declare(strict_types = 1);
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namespace BaconQrCode\Renderer\Module;
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use BaconQrCode\Encoder\ByteMatrix;
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use BaconQrCode\Exception\InvalidArgumentException;
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use BaconQrCode\Renderer\Module\EdgeIterator\EdgeIterator;
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use BaconQrCode\Renderer\Path\Path;
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/**
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* Rounds the corners of module groups.
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*/
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final class RoundnessModule implements ModuleInterface
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{
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public const STRONG = 1;
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public const MEDIUM = .5;
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public const SOFT = .25;
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/**
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* @var float
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*/
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private $intensity;
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public function __construct(float $intensity)
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{
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if ($intensity <= 0 || $intensity > 1) {
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throw new InvalidArgumentException('Intensity must between 0 (exclusive) and 1 (inclusive)');
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}
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$this->intensity = $intensity / 2;
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}
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public function createPath(ByteMatrix $matrix) : Path
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{
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$path = new Path();
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foreach (new EdgeIterator($matrix) as $edge) {
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$points = $edge->getSimplifiedPoints();
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$length = count($points);
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$currentPoint = $points[0];
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$nextPoint = $points[1];
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$horizontal = ($currentPoint[1] === $nextPoint[1]);
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if ($horizontal) {
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$right = $nextPoint[0] > $currentPoint[0];
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$path = $path->move(
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$currentPoint[0] + ($right ? $this->intensity : -$this->intensity),
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$currentPoint[1]
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);
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} else {
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$up = $nextPoint[0] < $currentPoint[0];
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$path = $path->move(
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$currentPoint[0],
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$currentPoint[1] + ($up ? -$this->intensity : $this->intensity)
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);
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}
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for ($i = 1; $i <= $length; ++$i) {
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if ($i === $length) {
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$previousPoint = $points[$length - 1];
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$currentPoint = $points[0];
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$nextPoint = $points[1];
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} else {
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$previousPoint = $points[(0 === $i ? $length : $i) - 1];
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$currentPoint = $points[$i];
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$nextPoint = $points[($length - 1 === $i ? -1 : $i) + 1];
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}
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$horizontal = ($previousPoint[1] === $currentPoint[1]);
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if ($horizontal) {
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$right = $previousPoint[0] < $currentPoint[0];
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$up = $nextPoint[1] < $currentPoint[1];
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$sweep = ($up xor $right);
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if ($this->intensity < 0.5
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|| ($right && $previousPoint[0] !== $currentPoint[0] - 1)
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|| (! $right && $previousPoint[0] - 1 !== $currentPoint[0])
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) {
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$path = $path->line(
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$currentPoint[0] + ($right ? -$this->intensity : $this->intensity),
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$currentPoint[1]
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);
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}
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$path = $path->ellipticArc(
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$this->intensity,
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$this->intensity,
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0,
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false,
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$sweep,
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$currentPoint[0],
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$currentPoint[1] + ($up ? -$this->intensity : $this->intensity)
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);
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} else {
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$up = $previousPoint[1] > $currentPoint[1];
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$right = $nextPoint[0] > $currentPoint[0];
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$sweep = ! ($up xor $right);
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if ($this->intensity < 0.5
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|| ($up && $previousPoint[1] !== $currentPoint[1] + 1)
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|| (! $up && $previousPoint[0] + 1 !== $currentPoint[0])
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) {
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$path = $path->line(
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$currentPoint[0],
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$currentPoint[1] + ($up ? $this->intensity : -$this->intensity)
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);
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}
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$path = $path->ellipticArc(
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$this->intensity,
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$this->intensity,
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0,
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false,
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$sweep,
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$currentPoint[0] + ($right ? $this->intensity : -$this->intensity),
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$currentPoint[1]
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);
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}
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}
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$path = $path->close();
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}
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return $path;
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}
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}
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