[Qemu-devel] [Bug 1799792] [NEW] Broken scaling with gtk, gl=on on a hidpi display

[Sebastian Krzyszkowiak]

Public bug reported:

Tested on QEMU 3.0.0 on Arch Linux.

I'm using a hidpi screen, and therefore use those environment variables
in order to have GTK+ apps properly scaled:

GDK_SCALE=2
GDK_DPI_SCALE=0.5

However, QEMU, when launched with "-display gtk,gl=on" option, doesn't
scale the window content properly, as seen on the attached screenshot.

Switching to "-display gtk,gl=off" and "-display sdl,gl=on" makes it
work fine.

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "Screenshot_20181024_222447.png"
   
https://bugs.launchpad.net/bugs/1799792/+attachment/5205039/+files/Screenshot_20181024_222447.png

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https://bugs.launchpad.net/bugs/1799792

Title:
  Broken scaling with gtk,gl=on on a hidpi display

Status in QEMU:
  New

Bug description:
  Tested on QEMU 3.0.0 on Arch Linux.

  I'm using a hidpi screen, and therefore use those environment
  variables in order to have GTK+ apps properly scaled:

  GDK_SCALE=2
  GDK_DPI_SCALE=0.5

  However, QEMU, when launched with "-display gtk,gl=on" option, doesn't
  scale the window content properly, as seen on the attached screenshot.

  Switching to "-display gtk,gl=off" and "-display sdl,gl=on" makes it
  work fine.

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