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PDF4QT

(c) Jakub Melka 2018-2022

Mgr.Jakub.Melka@gmail.com

https://jakubmelka.github.io/

This software is consisting of PDF rendering library, and several applications, such as advanced document viewer, command line tool, and document page manipulator application. Software is implementing PDF functionality based on PDF Reference 2.0. It is written and maintained by Jakub Melka.

Software works on Microsoft Windows / Linux.

Software is provided without any warranty of any kind.

1. ACKNOWLEDGEMENTS

This software is based in part on the work of the Independent JPEG Group.

2. LEGAL ISSUES

Both library and viewer uses more benevolent LGPL license, so it is more usable in commercial software, than GPL code only. Please see attached file - LICENSE.txt to see details. This software also uses several third party software, and user of this software must also respect licenses of third party libraries.

3. FEATURES

Software have following features (the list is not complete):

multithreading support
hardware accelerated rendering
encryption
color management
optional content handling
text layout analysis
signature validation
annotations
form filling
text to speech capability
editation
file attachments
optimalization (compressing documents)
command line tool
audio book conversion
internal structure inspector
compare documents
static XFA support (readonly, simple XFA only)
electronically/digitally sign documents
public key security encryption
3D PDF support (planned in year 2022)
create fillable forms (planned in year 2023)
watermarks / headers / footers (planned in year 2023)
presentation application (planned in year 2023)

4. THIRD PARTY LIBRARIES

Several third-party libraries are used.

libjpeg, see https://www.ijg.org/
FreeType, see https://www.freetype.org/index.html, FTL license used
OpenJPEG, implementing Jpeg2000, see https://www.openjpeg.org/, 2-clause MIT license
Qt, https://www.qt.io/, LGPL license used
OpenSSL, https://www.openssl.org/, Apache 2.0 license
LittleCMS, http://www.littlecms.com/
zlib, https://zlib.net/

5. CONTRIBUTIONS

If you want to contribute to this project, it is required, that you (contributor) fill and digitally sign document Contributor License Agreement, because I want to have a freedom to do whatever I want with my library, without obligation to someone else. But I would strongly prefer, if you want to contribute, to contribute in a form of testing, consultation, giving advices etc. I would like to write this library entirely by myself.

6. COMPILING

Compilation on Windows and Linux is available. To compile this project, compiler supporting C++20 is needed. On Windows, you can use Visual Studio 2022 or mingw. On linux, only GCC 11.2.0 was tested.

Compilation instructions (both Windows/Linux)

Download Qt 6.4 or higher, and VCPKG package manager (https://vcpkg.io/en/index.html)
Open Qt Creator and configure the project
Build

CMAKE Compilation Options

Several important compilation options is available and should be set before building. On Windows, CMake can prepare Wix project to create *.msi installer package.

Option	Platform	Description
`PDF4QT_INSTALL_MSVC_REDISTRIBUTABLE`	Windows	Includes MSVC redistributable in installation
`PDF4QT_INSTALL_PREPARE_WIX_INSTALLER`	Windows	Prepare .msi installator using Wix installer
`PDF4QT_INSTALL_DEPENDENCIES`	Any	Install dependent libraries into installation directory
`PDF4QT_INSTALL_QT_DEPENDENCIES`	Any	Install Qt dependent libraries into installation directory

Following important variables should be set or checked before any attempt to compile this project:

Variable	Platform	Description
`PDF4QT_QT_ROOT`	Any	Qt installation directory
`QT_CREATOR_SKIP_VCPKG_SETUP`	Any	Enable or disable automatic vcpkg setup

Tested Compilers - Windows

Visual Studio 2022 (Microsoft Visual C++ Compiler 17.1)
MinGW 11.2.0

Tested Compilers - Linux

GCC 11.2.0

7. DISCLAIMER

I wrote this project in my free time. I hope you will find it useful!

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