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Deploy Ladill QR Plus / deploy (push) Successful in 28s
Full control center for ticketed events, contributions, attendees, badges, and programmes — not a QR utility clone. Includes SSO shell, import command, and platform cutover runbook. Co-authored-by: Cursor <cursoragent@cursor.com>
94 lines
3.4 KiB
PHP
94 lines
3.4 KiB
PHP
<?php
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namespace App\Services\Qr;
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class QrPdfExporter
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{
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public function fromPng(string $pngBinary, string $title): string
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{
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if (! extension_loaded('gd')) {
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throw new \RuntimeException('PDF export requires the GD extension.');
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}
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$image = imagecreatefromstring($pngBinary);
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if ($image === false) {
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throw new \RuntimeException('Could not read QR image for PDF export.');
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}
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$width = imagesx($image);
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$height = imagesy($image);
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$canvas = imagecreatetruecolor($width, $height);
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$white = imagecolorallocate($canvas, 255, 255, 255);
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imagefilledrectangle($canvas, 0, 0, $width, $height, $white);
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imagecopy($canvas, $image, 0, 0, 0, 0, $width, $height);
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imagedestroy($image);
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ob_start();
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imagejpeg($canvas, null, 95);
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$jpeg = (string) ob_get_clean();
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imagedestroy($canvas);
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return $this->buildPdf($jpeg, $title, $width, $height);
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}
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private function buildPdf(string $jpeg, string $title, int $imgW, int $imgH): string
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{
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$pageW = 595.28;
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$pageH = 841.89;
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$margin = 48;
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$maxQr = min($pageW - ($margin * 2), 320);
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$scale = min($maxQr / max(1, $imgW), $maxQr / max(1, $imgH));
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$drawW = $imgW * $scale;
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$drawH = $imgH * $scale;
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$x = ($pageW - $drawW) / 2;
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$y = 120;
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$safeTitle = $this->pdfEscape(substr($title, 0, 80));
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$objects = [];
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$objects[] = "1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj\n";
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$objects[] = "2 0 obj << /Type /Pages /Kids [3 0 R] /Count 1 >> endobj\n";
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$objects[] = sprintf(
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"3 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 %.2F %.2F] /Resources << /Font << /F1 4 0 R >> /XObject << /Im1 5 0 R >> >> /Contents 6 0 R >> endobj\n",
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$pageW,
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$pageH,
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);
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$objects[] = "4 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold >> endobj\n";
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$objects[] = sprintf(
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"5 0 obj << /Type /XObject /Subtype /Image /Width %d /Height %d /ColorSpace /DeviceRGB /BitsPerComponent 8 /Filter /DCTDecode /Length %d >> stream\n%s\nendstream\nendobj\n",
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$imgW,
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$imgH,
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strlen($jpeg),
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$jpeg,
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);
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$content = "BT /F1 16 Tf 48 " . ($pageH - 72) . " Td ({$safeTitle}) Tj ET\n";
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$content .= sprintf("q %.4F 0 0 %.4F %.2F %.2F cm /Im1 Do Q\n", $drawW, $drawH, $x, $pageH - $y - $drawH);
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$content .= "BT /F1 10 Tf 48 48 Td (Generated by Ladill QR Codes) Tj ET\n";
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$objects[] = sprintf("6 0 obj << /Length %d >> stream\n%s\nendstream\nendobj\n", strlen($content), $content);
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$pdf = "%PDF-1.4\n";
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$offsets = [0];
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foreach ($objects as $object) {
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$offsets[] = strlen($pdf);
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$pdf .= $object;
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}
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$xrefPos = strlen($pdf);
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$pdf .= "xref\n0 " . count($offsets) . "\n";
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$pdf .= "0000000000 65535 f \n";
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for ($i = 1; $i < count($offsets); $i++) {
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$pdf .= sprintf("%010d 00000 n \n", $offsets[$i]);
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}
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$pdf .= "trailer << /Size " . count($offsets) . " /Root 1 0 R >>\n";
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$pdf .= "startxref\n{$xrefPos}\n%%EOF";
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return $pdf;
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}
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private function pdfEscape(string $text): string
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{
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return str_replace(['\\', '(', ')'], ['\\\\', '\\(', '\\)'], $text);
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}
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}
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