It's right now a major pain trying to get qbs dependencies sorted out on flatpak and qmake is deprecated as of qt6. It would make things easier if you switched to cmake or meson which is what qt6 wants you to use (cmake) and meson is just one or two files rather than scattered across subdirectories. Could you please consider adding in cmake or meson? Or fully switching to one of them. Thank you.

https://mesonbuild.com/ https://cmake.org/documentation/

Also, another major pain is conan + conan dependencies. I think you can do cmake/meson without them. What do you think?

I feel like something that's missing from this program is ability to redact (permanently remove and cover with black) images and/or text along with ability to sanitize the document for anything personal. Adobe Acrobat will remove ALL annotations along with any potential personal info and strip out any javascript making it safe to share with someone else when sanitizing a PDF. Could you consider implementing that? Thanks. Also, I'm very pleased to witness that your PDF reader actually removes annotations rather than keeping them in like poppler and mupdf do. I'll definitely recommend this program if anyone talks about PDF readers.

Can you please implement "Reset option" (to default)?

I tried to play with speech settings (PDF4QT - 1.3.0 Winter Release, Windows 10 64bit) and Pdf4QtViewerProfi/Pdf4QtViewerLite now crash when I hit CTRL+K, so even I do not see setting widget.

If it helps: As far as I remember I changed engine from sapi to winrt and then it crashed (first time).

Hi, I've been trying to build this library on Windows 11. I'm using CMake and vcpkg to manage the dependencies. When I tried to compile the library using MSVC 2019, I get the following compilation error:

sources\pdfsignaturehandler.cpp(1462,41): error C2440: 'initializing': cannot convert from 'const rsa_st *' to 'RSA *'

I think this is caused by a change in recent versions of OpenSSL 3 (I think this one), that EVP_PKEY_get0* functions have a const return type.

I use conan to get all the packages (except Qt). Works the same on linux/windows. I still have an issue on windows: the SPF_PARSE_SAPI is not found. There mush be an issue with the windowskit. Which one are you using? And how do we select which one to use (I am not an expert on windows)?

I want to resume doing the flatpak build (Sorry for taking so long, life was really chaotic for me at the time). But I want to use a more recent release with the port from qbs to CMake. Thank you.

Create table selection tool which will automatically determine rows and columns of the table. Table rows/columns should be editable by the user (insert rows/columns, delete them and move them). Then, table content is copied into the clipboard.

• Automatic table structure recognition
• Insert/Remove/Move rows and columns
• Copy to clipboard via CSV
• Export to CSV
• Export to MS Excel [Optional]

Implement public key security handler acc. to. section 7.6.5 of PDF 2.0 specification. Both encryption/decryption must be implemented, and also certificate manager to provide a way to the user to create it's own certificates.

• encryption
• decryption
• certificate manager

Use Wix Installer toolset to create *.msi install package instead of Qt installer framework. This enables to publish this software on Microsoft Store and also other advanced features (such as repairing the installation etc.).

For vertical writing system, writing mode must be read from cmap from entry WMode. Now, it is not respected and writing mode is being read from the font itself. This affects, for example, chinese characters.

Rework of page rendering / thumbnail images should be done.

• Do not spawn specific thread for each page to be rendered
• Remove too old pages from the cache
• Cancel page rendering when needed (do not wait until whole page is rendered)
• Improve thumbnail drawing

These issues are performance issues directly affecting the user. When specific thread is spawn for each page to be rendered, it can exhaust the computer when many pages are rendered (user navigates quickly trough document). Too old pages should be removed because otherwise they will be in the cache forever (or until limit is reached). And when complex page is being rendered, and user wants to perform action which should react immediately (closing the document, or some other action), the rendering engine will wait when a whole page is being rendered. It should break immediately.

Hi,

It would be really nice to have the opportunity to add pictures (.jpg, .png, etc.) to pdf files. Do you think it could be added to your software in the future?

Thanks anyway for the useful software!

Having your program on flatpak via flathub will give it enormous exposure and it would be great to be able to seamlessly set it up using a program that me and others are already familiar with.

You can find info on submitting application here: https://github.com/flathub/flathub/wiki/App-Submission

If you don't wish to do the submission yourself, may I have your permission to pack this up for flathub and flatpak?

Performance optimization of software renderer for Output Preview is needed, it is now too slow to be useable. These issues needs to be solved:

• sparse bitmaps to improve memory and speed
• use Qt's renderer for glyph shape painting
• maybe use QRegion