michaelschiemer/tests/debug/test-svg-rendering-issues.php

<?php

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use App\Framework\QrCode\QrCodeGenerator;
use App\Framework\QrCode\QrCodeRenderer;
use App\Framework\QrCode\ValueObjects\ErrorCorrectionLevel;
use App\Framework\QrCode\ValueObjects\QrCodeConfig;
use App\Framework\QrCode\ValueObjects\QrCodeVersion;
use App\Framework\QrCode\ValueObjects\EncodingMode;
use App\Framework\QrCode\ValueObjects\QrCodeStyle;

echo "=== SVG Rendering Issues Test ===\n\n";

$testData = 'HELLO WORLD';
$config = new QrCodeConfig(
    version: QrCodeVersion::fromNumber(1),
    errorCorrectionLevel: ErrorCorrectionLevel::M,
    encodingMode: EncodingMode::BYTE
);

$matrix = QrCodeGenerator::generate($testData, $config);
$renderer = new QrCodeRenderer();

// Test with default style
echo "=== Default Style ===\n";
$defaultStyle = QrCodeStyle::default();
echo "Module size: {$defaultStyle->moduleSize}px\n";
echo "Quiet zone: {$defaultStyle->quietZoneSize} modules\n";
$canvasSize = $defaultStyle->calculateCanvasSize($matrix->getSize());
echo "Canvas size: {$canvasSize}px\n\n";

$svg = $renderer->renderSvg($matrix);
$outputPath = __DIR__ . '/test-qrcodes/default-style.svg';
file_put_contents($outputPath, $svg);
echo "✅ Saved: {$outputPath}\n";
echo "Size: " . strlen($svg) . " bytes\n\n";

// Test with larger module size
echo "=== Large Module Size (20px) ===\n";
$largeStyle = QrCodeStyle::large();
echo "Module size: {$largeStyle->moduleSize}px\n";
echo "Quiet zone: {$largeStyle->quietZoneSize} modules\n";
$canvasSize = $largeStyle->calculateCanvasSize($matrix->getSize());
echo "Canvas size: {$canvasSize}px\n\n";

$svgLarge = $renderer->renderSvg($matrix, $largeStyle);
$outputPathLarge = __DIR__ . '/test-qrcodes/large-modules.svg';
file_put_contents($outputPathLarge, $svgLarge);
echo "✅ Saved: {$outputPathLarge}\n";
echo "Size: " . strlen($svgLarge) . " bytes\n\n";

// Analyze SVG structure
echo "=== SVG Analysis ===\n";
$rectCount = substr_count($svg, '<rect');
echo "Rectangles: {$rectCount}\n";

// Check for white background
if (strpos($svg, 'fill="white"') !== false || strpos($svg, 'fill="#FFFFFF"') !== false || strpos($svg, 'fill="#ffffff"') !== false) {
    echo "✅ Has white background\n";
} else {
    echo "❌ Missing white background\n";
}

// Check for black modules
if (strpos($svg, 'fill="black"') !== false || strpos($svg, 'fill="#000000"') !== false || strpos($svg, 'fill="#000"') !== false) {
    echo "✅ Has black modules\n";
} else {
    echo "❌ Missing black modules\n";
}

// Check SVG dimensions
preg_match('/width="([0-9.]+)"\s+height="([0-9.]+)"/', $svg, $matches);
if (!empty($matches)) {
    $width = (float)$matches[1];
    $height = (float)$matches[2];
    echo "SVG dimensions: {$width}x{$height}px\n";
    
    // Calculate expected size
    $matrixSize = $matrix->getSize();
    $expectedSize = ($matrixSize + 2 * $defaultStyle->quietZone) * $defaultStyle->moduleSize;
    
    if (abs($width - $expectedSize) < 1) {
        echo "✅ Dimensions correct\n";
    } else {
        echo "⚠️ Dimensions might be off: expected ~{$expectedSize}px\n";
    }
}

echo "\n";

// Check for common SVG issues
echo "=== Common SVG Issues ===\n";

// Check if rectangles are properly positioned
preg_match_all('/x="([0-9.]+)"\s+y="([0-9.]+)"/', $svg, $positionMatches);
if (!empty($positionMatches[1])) {
    $minX = min(array_map('floatval', $positionMatches[1]));
    $minY = min(array_map('floatval', $positionMatches[2]));
    
    echo "First rectangle position: ({$minX}, {$minY})\n";
    
    // Quiet zone should start at moduleSize * quietZone
    $expectedStart = $defaultStyle->moduleSize * $defaultStyle->quietZone;
    
    if (abs($minX - $expectedStart) < 1) {
        echo "✅ Quiet zone position correct\n";
    } else {
        echo "⚠️ Quiet zone position: expected {$expectedStart}px, got {$minX}px\n";
    }
}

// Check rectangle sizes
preg_match_all('/width="([0-9.]+)"\s+height="([0-9.]+)"/', $svg, $sizeMatches);
if (!empty($sizeMatches[1])) {
    $widths = array_unique(array_map('floatval', $sizeMatches[1]));
    $heights = array_unique(array_map('floatval', $sizeMatches[2]));
    
    echo "Rectangle sizes: " . implode(', ', $widths) . " x " . implode(', ', $heights) . "\n";
    
    $expectedSize = $defaultStyle->moduleSize;
    if (in_array($expectedSize, $widths) && in_array($expectedSize, $heights)) {
        echo "✅ Module size correct ({$expectedSize}px)\n";
    } else {
        echo "⚠️ Module size might be wrong: expected {$expectedSize}px\n";
    }
}

echo "\n";

// Generate PNG version for better scanner compatibility
echo "=== Generating PNG Version ===\n";
echo "PNG format is often more reliable for QR code scanners.\n";
echo "SVG can have issues with:\n";
echo "1. Anti-aliasing in browsers\n";
echo "2. Scaling issues\n";
echo "3. Color precision\n";
echo "4. Rendering differences between browsers\n\n";

echo "Recommendation: Use PNG for production QR codes.\n";