Реализация генератора QR-кодов с логотипом Ely.by

2025-05-31 14:11:46 +05:30 · 2017-01-19 01:46:54 +03:00
parent c15361ddbe
commit bb1fd1a960
5 changed files with 127 additions and 3 deletions
--- a/common/components/Qr/ElyDecorator.php
+++ b/common/components/Qr/ElyDecorator.php
@@ -0,0 +1,116 @@
+<?php
+namespace common\components\Qr;
+
+use BaconQrCode\Common\ErrorCorrectionLevel;
+use BaconQrCode\Encoder\QrCode;
+use BaconQrCode\Renderer\Image\Decorator\DecoratorInterface;
+use BaconQrCode\Renderer\Image\RendererInterface;
+use BaconQrCode\Renderer\Image\Svg;
+use Imagick;
+use InvalidArgumentException;
+use ReflectionClass;
+
+class ElyDecorator implements DecoratorInterface {
+
+    private const LOGO = __DIR__ . '/resources/logo.svg';
+
+    private const CORRECTION_MAP = [
+        ErrorCorrectionLevel::L => 7,
+        ErrorCorrectionLevel::M => 15,
+        ErrorCorrectionLevel::Q => 25,
+        ErrorCorrectionLevel::H => 30,
+    ];
+
+    public function preProcess(
+        QrCode $qrCode,
+        RendererInterface $renderer,
+        $outputWidth,
+        $outputHeight,
+        $leftPadding,
+        $topPadding,
+        $multiple
+    ) {
+        if (!$renderer instanceof Svg) {
+            throw new InvalidArgumentException('$renderer must by instance of ' . Svg::class);
+        }
+
+        $correctionLevel = self::CORRECTION_MAP[$qrCode->getErrorCorrectionLevel()->get()];
+        $sizeMultiplier = $correctionLevel + floor($correctionLevel / 3);
+        $count = $qrCode->getMatrix()->getWidth();
+
+        $countToRemoveX = floor($count * $sizeMultiplier / 100);
+        $countToRemoveY = floor($count * $sizeMultiplier / 100);
+
+        $startX = $leftPadding + round(($count - $countToRemoveX) / 2 * $multiple);
+        $startY = $topPadding + round(($count - $countToRemoveY) / 2 * $multiple);
+        $width = $countToRemoveX * $multiple;
+        $height = $countToRemoveY * $multiple;
+
+        $reflection = new ReflectionClass($renderer);
+        $property = $reflection->getProperty('svg');
+        $property->setAccessible(true);
+        /** @var \SimpleXMLElement $svg */
+        $svg = $property->getValue($renderer);
+
+        $image = $svg->addChild('image');
+        $image->addAttribute('x', $startX);
+        $image->addAttribute('y', $startY);
+        $image->addAttribute('width', $width);
+        $image->addAttribute('height', $height);
+        $image->addAttribute('xlink:href', $this->encodeSvgToBase64(self::LOGO));
+
+        $logo = new Imagick();
+        $logo->readImage(self::LOGO);
+        $logo->scaleImage($width, $height);
+
+        $foundedPixels = [];
+        foreach ($logo->getPixelIterator() as $row => $pixels) {
+            /** @var \ImagickPixel[] $pixels */
+            foreach ($pixels as $column => $pixel) {
+                $color = $pixel->getColorAsString();
+                if ($color !== 'srgb(255,255,255)') {
+                    $foundedPixels[] = [(int)($startX + $column), (int)($startY + $row)];
+                }
+            }
+        }
+
+        $logo->clear();
+        $logo->destroy();
+
+        $padding = $multiple - 2;
+        if ($padding < 0) {
+            $padding = 1;
+        }
+
+        foreach ($foundedPixels as $coordinates) {
+            [$x, $y] = $coordinates;
+            $x -= $leftPadding;
+            $y -= $topPadding;
+
+            for ($i = $x - $padding; $i <= $x + $padding; $i++) {
+                for ($j = $y - $padding; $j <= $y + $padding; $j++) {
+                    $matrixX = floor($i / $multiple);
+                    $matrixY = floor($j / $multiple);
+                    $qrCode->getMatrix()->set($matrixX, $matrixY, 0);
+                }
+            }
+        }
+    }
+
+    public function postProcess(
+        QrCode $qrCode,
+        RendererInterface $renderer,
+        $outputWidth,
+        $outputHeight,
+        $leftPadding,
+        $topPadding,
+        $multiple
+    ) {
+
+    }
+
+    private function encodeSvgToBase64(string $filePath): string {
+        return 'data:image/svg+xml;base64,' . base64_encode(file_get_contents($filePath));
+    }
+
+}