qt5.15.2 QPdfWriter fails to output embedded fonts in PDF

[lctong888]

This issue has been resolved in Qt versions 6.7 and above.
I would like to address this issue in Qt 5.15.2 version. Could you please tell me the manually modified Qt 5.15.2 code method? Thank you.

[Christian Ehrlicher]

Use the patch, try to apply it to the Qt source code and then compile Qt by yourself.

[lctong888]

What is the method of using patches?

[lctong888]

When I copied these Qt 6.7.0 source codes to Qt 5.15.2 for compilation, errors occurred

[Christian Ehrlicher]

I never said you should copy some files around - you have to apply the patch which fixes the problem for 6.7 to your ancient sources, hope they apply cleanly (if not you have to fix the merge problems by yourself) and compile Qt by yourself.
Or use a recent version of Qt.

[lctong888]

Thank you, I'll find a way on my own

[Axel Spoerl]

It’s probably less work to change to Qt 6.
You need to find out first, which commit(s) have actually solved the problem. Then it’s quite unlikely you can just cherry pick to 515. There will likely be merge conflicts. And resolving them technically, doesn’t guarantor that the fix will actually work. There is absolutely no reason to stick around with 5.15.

[lctong888]

QT6.7.0 cannot run on Windows 7 system,
QT5.15.2 can run on Windows 7 system.

[Axel Spoerl]

If memory serves well, Windows 7 support ended January 14th, 2020….

[lctong888]

Windows 7 support ended January 14th, 2020，Yes,
Currently, many old computers are still running Windows 7 and have not been upgraded to Windows 10 or above