Problems with high DPI display

jlmwrite · 06-19-2016, 12:10 PM

Hi,

I just upgraded to a new Windows 10 laptop with a default DPI of 3200x1800. Calibre doesn't display everything quite right at this DPI.

I've done some research, and have edited the properties (such as "Disable display scaling on high DPI settings") and even tried reducing the screen resolution without success.

At best, Calibre looks just a bit strange. And there are some places where I can't even see the icons at all, such as in the comments box when editing metadata. (See screen shot).

I seem to recall that Kovid said this wasn't going to be fixed until he got a high DPI display. Does anyone else have suggestions? I cannot be the only Calibre user out there with a high DPI display!

Thanks in advance.

kovidgoyal · 06-19-2016, 12:19 PM

It's hard for me to fix High DPI issues without a way to replicate them. So yeah, until I get myself a high DPI monitor, there is not likely to be much progress on this.

That said, if you point out specific issues I can try to look into the code and see if I can make adjustments that might help.

Rand Brittain · 06-21-2016, 05:30 PM

It's quite difficult to use Calibre on devices like the Surface, so it might be something worth passing the hat around for now that high-DPI laptops and tablets are becoming increasingly common.

sherman · 06-26-2016, 05:55 AM

Depending on your video card and/or OS, a high DPI monitor is not necessarily required to test DPI issues. I know that on Windows at least, if you have a NVIDIA or AMD video card, it is possible to set a virtual resolution that is higher than your monitor, and will then be scaled down. You can then change the DPI scaling options to mimic a high DPI monitor.

I don't know whether this is possible on other OS's, or with Intel graphics, but it may be worth a try to see if it's possible.

rboatright · 08-08-2016, 03:28 PM

Quote:

Originally Posted by kovidgoyal

It's hard for me to fix High DPI issues without a way to replicate them. So yeah, until I get myself a high DPI monitor, there is not likely to be much progress on this.

That said, if you point out specific issues I can try to look into the code and see if I can make adjustments that might help.

How can we contribute to the "Get Kovid a high res monitor" fund?

Since 3840 x 2160 28" monitors go for $299 or so these days, it shouldn't be hard to get a group to pony it up.

Having said that, the first two areas that come up are in Preferences, where the icons come out as tiny. If you choose "very large" icons in the preferences, that effects the main and secondary icon bar, but does not effect the size of the icons displayed in preferences.

The second one that hits me a lot is when using the "Manage Series" plugin. The individual lines are about 70% of the font's line height, so you can't read them.

I did manage to come up with font and line height choices that worked on the main screen, but all plugins ignore them.

kovidgoyal · 08-08-2016, 10:14 PM

Try using the QT_DEVICE_PIXEL_RATIO exvironment variable.

Try setting it to either auto or 2 or some other number that suits your setup.

As for plugins -- those you'll have to ask the plugin authors for help with. Most likely somewhere in there they have specified some sizes using absolute units, which will need to be changed to use responsive units.

eMole · 08-09-2016, 01:36 AM

Is this High DPI thing the same I can switch to in Linux Mint (Cinnamon)?
Or using the slider to scale desktop items in Ubuntu? For those with a mole's eye.

Buttons missing from the bottom of a dialog box, like storing a search expression in the editor.

On windows currently, cannot provide screenshot.

kovidgoyal · 08-10-2016, 06:32 AM

@eMole: I dont see how hiDPI issues could cause missing buttons, but a screen shot would be useful, so I know what you are talking about.

@rboatright: This commit should fix the issue of small icons in the preferences dialog: https://github.com/kovidgoyal/calibr...a349e9afc3f05e

You have ay other issues (non-plugin related) I will be happy to look into them.

eMole · 08-11-2016, 05:58 AM

My bad, it was a false alarm. Sorry about that. Editor wasn't fully maximized, bottom went out of the screen.

(I might do something unusual. I use a television set as a monitor, watched as one supposed to watch TV: from a couple meters away. I need to enlarge the view or use a binocular.)

06-19-2016, 12:10 PM	#1
jlmwrite Zealot Posts: 143 Karma: 13398 Join Date: Feb 2010 Location: Golden, Colorado Device: Samsung Tab S8.4, Samsung Galaxy S7 Edge	Problems with high DPI display Hi, I just upgraded to a new Windows 10 laptop with a default DPI of 3200x1800. Calibre doesn't display everything quite right at this DPI. I've done some research, and have edited the properties (such as "Disable display scaling on high DPI settings") and even tried reducing the screen resolution without success. At best, Calibre looks just a bit strange. And there are some places where I can't even see the icons at all, such as in the comments box when editing metadata. (See screen shot). I seem to recall that Kovid said this wasn't going to be fixed until he got a high DPI display. Does anyone else have suggestions? I cannot be the only Calibre user out there with a high DPI display! Thanks in advance. Attached Thumbnails

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Image display problems	roger64	KOReader	22	05-20-2016 04:30 PM
Bluefire display problems	ramusthomas	ePub	13	05-29-2015 01:36 PM
High quality pics of the Voyage display	cruff	Amazon Kindle	53	10-27-2014 07:08 PM
A 458 dpi color display	ardeegee	News	3	10-29-2010 01:58 AM

06-19-2016, 12:19 PM	#2
kovidgoyal creator of calibre Posts: 45,353 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It's hard for me to fix High DPI issues without a way to replicate them. So yeah, until I get myself a high DPI monitor, there is not likely to be much progress on this. That said, if you point out specific issues I can try to look into the code and see if I can make adjustments that might help.

06-21-2016, 05:30 PM	#3
Rand Brittain Bookmaker Posts: 427 Karma: 2143650 Join Date: Sep 2010 Device: Cybook Opus	It's quite difficult to use Calibre on devices like the Surface, so it might be something worth passing the hat around for now that high-DPI laptops and tablets are becoming increasingly common.

06-26-2016, 05:55 AM	#4
sherman Guru Posts: 875 Karma: 2676800 Join Date: Aug 2008 Location: Taranaki - NZ Device: Kobo Aura H2O, Kobo Forma	Depending on your video card and/or OS, a high DPI monitor is not necessarily required to test DPI issues. I know that on Windows at least, if you have a NVIDIA or AMD video card, it is possible to set a virtual resolution that is higher than your monitor, and will then be scaled down. You can then change the DPI scaling options to mimic a high DPI monitor. I don't know whether this is possible on other OS's, or with Intel graphics, but it may be worth a try to see if it's possible.

08-08-2016, 10:14 PM	#6
kovidgoyal creator of calibre Posts: 45,353 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Try using the QT_DEVICE_PIXEL_RATIO exvironment variable. Try setting it to either auto or 2 or some other number that suits your setup. As for plugins -- those you'll have to ask the plugin authors for help with. Most likely somewhere in there they have specified some sizes using absolute units, which will need to be changed to use responsive units.

08-09-2016, 01:36 AM	#7
eMole Zealot Posts: 130 Karma: 546310 Join Date: Jun 2011 Device: PocketBook Touch HD, PocketBook Era	Is this High DPI thing the same I can switch to in Linux Mint (Cinnamon)? Or using the slider to scale desktop items in Ubuntu? For those with a mole's eye. Buttons missing from the bottom of a dialog box, like storing a search expression in the editor. On windows currently, cannot provide screenshot.

08-10-2016, 06:32 AM	#8
kovidgoyal creator of calibre Posts: 45,353 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	@eMole: I dont see how hiDPI issues could cause missing buttons, but a screen shot would be useful, so I know what you are talking about. @rboatright: This commit should fix the issue of small icons in the preferences dialog: https://github.com/kovidgoyal/calibr...a349e9afc3f05e You have ay other issues (non-plugin related) I will be happy to look into them.

08-11-2016, 05:58 AM	#9
eMole Zealot Posts: 130 Karma: 546310 Join Date: Jun 2011 Device: PocketBook Touch HD, PocketBook Era	My bad, it was a false alarm. Sorry about that. Editor wasn't fully maximized, bottom went out of the screen. (I might do something unusual. I use a television set as a monitor, watched as one supposed to watch TV: from a couple meters away. I need to enlarge the view or use a binocular.)

Advert

Advert