tc-lib-pdf-filter

Decoder library for standard PDF stream filters.

💖 Part of the tc-lib-pdf / TCPDF ecosystem (100M+ installs). Sponsor its maintenance →

Overview

tc-lib-pdf-filter decodes compression and transformation filters defined by the PDF specification.

It is intended for parsing workflows where encoded PDF streams must be decoded according to the standard filter pipeline. By isolating filter logic in one component, callers get predictable behavior and easier testing across different document inputs.


Namespace	`\Com\Tecnick\Pdf\Filter`
Author	Nicola Asuni [email protected]
License	GNU LGPL v3 - see LICENSE
API docs	https://tcpdf.org/docs/srcdoc/tc-lib-pdf-filter
Packagist	https://packagist.org/packages/tecnickcom/tc-lib-pdf-filter

Features

PDF Filters

FlateDecode, LZWDecode, RunLengthDecode
ASCIIHexDecode, ASCII85Decode
CCITTFaxDecode, DCTDecode, JPXDecode, JBIG2Decode

API Design

Decode one filter or apply multiple filters in sequence
Pure-PHP implementation suitable for parser integration
Typed exceptions for unknown/invalid filter handling

Requirements

PHP 8.2 or later
Extension: zlib
Composer

Installation

composer require tecnickcom/tc-lib-pdf-filter

Quick Start

<?php

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

$filter = new \Com\Tecnick\Pdf\Filter\Filter();
$decoded = $filter->decodeAll(['ASCIIHexDecode', 'FlateDecode'], $data);

Development

make deps
make help
make qa

Packaging

make rpm
make deb

For system packages, bootstrap with:

require_once '/usr/share/php/Com/Tecnick/Pdf/Filter/autoload.php';

Contributing

Contributions are welcome. Please review CONTRIBUTING.md, CODE_OF_CONDUCT.md, and SECURITY.md.

Tc Lib Pdf Filter Laravel Package