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Example code of tecnickcom/tc-lib-pdf-image

Informations about the package tc-lib-pdf-image

tc-lib-pdf-image

Image import and embedding utilities for PDF streams.

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Overview

tc-lib-pdf-image handles image import, conversion, and output structures used by PDF generators.

The library isolates image pipeline concerns such as format handling, normalization, and object generation for PDF embedding. Keeping this logic separate helps reduce complexity in document-level code and makes image behavior easier to validate and maintain.
Namespace \Com\Tecnick\Pdf\Image
Author Nicola Asuni [email protected]
License GNU LGPL v3 - see LICENSE
API docs https://tcpdf.org/docs/srcdoc/tc-lib-pdf-image
Packagist https://packagist.org/packages/tecnickcom/tc-lib-pdf-image

Features

Import Support

PDF Integration

Requirements

Installation

Quick Start

You can configure the \Com\Tecnick\File\File helper with host/path allowlists:

For full file-loading options, see the tc-lib-file documentation: https://tcpdf.org/docs/srcdoc/tc-lib-file

Persistent image cache

Processing an image (decode, resize, re-encode, alpha-mask extraction) is the expensive part of importing. By default the result is cached in memory for the lifetime of the Import instance, so reusing the same image within one document is cheap.

To reuse processed images across documents and processes (e.g. brand assets reused on thousands of PDFs), inject an optional external cache. The library ships only the contract — \Com\Tecnick\Pdf\Image\ImageCacheInterface — and you provide the backend (filesystem, APCu, Redis, a PSR-16 cache, ...):

Pass an implementation to the constructor (default null keeps the current in-memory-only behaviour):

On a miss the processed data is written through to the cache; on a later run a hit short-circuits all processing. For local files the persistent key folds in the file modification time and size, so editing an image in place invalidates its stale entry automatically.

Security: the cache store is a trust boundary. Stored bytes (image data, palette, ICC profile) are embedded verbatim into generated PDFs, so use a store only your application can write to. If your implementation serializes entries, deserialize with object restoration disabled, e.g. unserialize($s, ['allowed_classes' => false]).

A minimal example implementation:

Development

Packaging

For system packages, bootstrap with:

Contributing

Contributions are welcome. Please review SECURITY.md.

All versions of tc-lib-pdf-image with dependencies

PHP Build Version
Package Version
Requires php Version >=8.2
ext-gd Version *
ext-zlib Version *
tecnickcom/tc-lib-file Version ^3.7
tecnickcom/tc-lib-color Version ^2.13
tecnickcom/tc-lib-pdf-encrypt Version ^2.9
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