Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
100.00% |
17 / 17 |
|
100.00% |
2 / 2 |
CRAP | |
100.00% |
1 / 1 |
| ImageParser | |
100.00% |
17 / 17 |
|
100.00% |
2 / 2 |
26 | |
100.00% |
1 / 1 |
| parse | |
100.00% |
9 / 9 |
|
100.00% |
1 / 1 |
13 | |||
| parseString | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
13 | |||
| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\ImageMetadata; |
| 6 | |
| 7 | use Phpdftk\Filesystem\LocalFilesystem; |
| 8 | |
| 9 | /** |
| 10 | * Detect image format from magic bytes and delegate to the format-specific parser. |
| 11 | * |
| 12 | * Extracts only header metadata (dimensions, color space, bit depth) — |
| 13 | * never decodes pixel data. This keeps image embedding fast since PDF |
| 14 | * can reference the compressed image bytes directly. |
| 15 | */ |
| 16 | final class ImageParser |
| 17 | { |
| 18 | public static function parse(string $path): ImageInfo |
| 19 | { |
| 20 | $data = LocalFilesystem::readPrefix($path, 32, "image file"); // read just enough for signature |
| 21 | return match (true) { |
| 22 | str_starts_with($data, "\xFF\xD8\xFF") => JpegParser::parseFile($path), |
| 23 | str_starts_with($data, "\x89PNG\r\n\x1A\n") => PngParser::parseFile($path), |
| 24 | str_starts_with($data, 'GIF87a') || str_starts_with($data, 'GIF89a') => GifParser::parseFile($path), |
| 25 | str_starts_with($data, 'II') || str_starts_with($data, 'MM') => TiffParser::parseFile($path), |
| 26 | str_starts_with($data, 'RIFF') && substr($data, 8, 4) === 'WEBP' => WebpParser::parseFile($path), |
| 27 | str_starts_with($data, "\x00\x00\x00\x0C\x6A\x50\x20\x20") || str_starts_with($data, "\xFF\x4F\xFF\x51") => Jpeg2000Parser::parseFile($path), |
| 28 | str_starts_with($data, "\x97\x4A\x42\x32\x0D\x0A\x1A\x0A") => Jbig2Parser::parseFile($path), |
| 29 | default => throw new \RuntimeException('Unsupported image format'), |
| 30 | }; |
| 31 | } |
| 32 | |
| 33 | public static function parseString(string $data): ImageInfo |
| 34 | { |
| 35 | return match (true) { |
| 36 | str_starts_with($data, "\xFF\xD8\xFF") => JpegParser::parse($data), |
| 37 | str_starts_with($data, "\x89PNG\r\n\x1A\n") => PngParser::parse($data), |
| 38 | str_starts_with($data, 'GIF87a') || str_starts_with($data, 'GIF89a') => GifParser::parse($data), |
| 39 | str_starts_with($data, 'II') || str_starts_with($data, 'MM') => TiffParser::parse($data), |
| 40 | str_starts_with($data, 'RIFF') && substr($data, 8, 4) === 'WEBP' => WebpParser::parse($data), |
| 41 | str_starts_with($data, "\x00\x00\x00\x0C\x6A\x50\x20\x20") || str_starts_with($data, "\xFF\x4F\xFF\x51") => Jpeg2000Parser::parse($data), |
| 42 | str_starts_with($data, "\x97\x4A\x42\x32\x0D\x0A\x1A\x0A") => Jbig2Parser::parse($data), |
| 43 | default => throw new \RuntimeException('Unsupported image format'), |
| 44 | }; |
| 45 | } |
| 46 | } |