It's specific only for AstraLinux.

The last release of dvd+rw-tools was made in 2008, and dvd+rw-format printed :-( even then.

This change allows to show remote contents as is.
For example, remote desktop may be started with QT_SCREEN_SCALE_FACTORS=2 and it will look good on highdpi monitor.

Yes, remote contents should not be scaled.

Have you installed libkrdc_vncplugin.so into the system?
KRDC doesn't search for plugins in the build tree.

fix initialization order

rebased
thanks for noticing

No, this change is only for DVD-RW, not DVD+RW.

This change prevents highdpi scaling of the remote desktop.
It's double-scaled on your gif and looks pixelated.

Well, I don't have time to contribute to this project, so I don't know what to do with it.

My OS (AstraLinux) is based on Debian stretch and has poppler 0.48, Qt 5.11, KF5 5.46.
And probably it will be a headache to update poppler on it, cause it's rather low-level library (cups-filters depends on it).

Sorry. I didn't add #include <config-okular-poppler.h> to formfields.h.
Correct fix: D21363.

Complete HiDPI support requires D21230.

rebased

I'm going to rebase it on D21096. Please, review that change first.

ok, leave only my own copyright

emulate missing QGraphicsView::mapToScene(const QPointF &) by using QPainterPath wrapper

But the code is yours, isn't it?

use precise coordinates for selections + use cosmetic pens

AA_UseHighDpiPixmaps is not related to previews, it's for icons on buttons.
devicePixelRatioF is needed to paint an image as is without highdpi scaling by Qt.

fix copyrights

polished

leave a single commit

rebase on D20841

revert

rebase on extracted HideRectItem

To paint non-pixelated icons on buttons.
This attribute "makes QIcon::pixmap() generate high-dpi pixmaps that can be larger than the requested size. Such pixmaps will have devicePixelRatio() set to a value higher than 1."

Qt supports a high DPI mode where the main coordinate system is virtualized and made independent of the display pixel density.
...
Geometry is now specified in device independent pixels. This includes widget and item geometry, event geometry, desktop, window and screen
geometry, and animation velocities. Rendered output is in device pixels, which corresponds to the display resolution. The ratio between the
device independent and device pixel coordinate systems is the devicePixelRatio.

Ideally, QWidget::mouseDoubleClickEvent() could be used instead of double tap gesture...
https://codereview.qt-project.org/#/c/259787/

removed needless image scaling

Beams look ugly when their width is >= 4 pixels.
The idea is to draw them with the same width regardless of DPI.
Another option is to not set Qt::FlatCap for thick pens, but I prefer this one.

use QPen::setWidthF() instead of QPen::setWidth()

reduced beam width