[Bug 1836361] [NEW] Windows guest display is inverted vertically

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[Impact]

 * When running a Windows VM using the QXL driver from [1] the display
is inverted and therefore almost unusable.

[Test Case]

 * Launch a Windows VM with a QXL display (I used Win2k16 running under libvirt).
 * Start websockify
     sudo apt install python3-websockify && websockify 5959 localhost:5900
 * Run a HTTP server to spice-html5:
   cd /usr/share/spice-html5 && python -m SimpleHTTPServer
 * Open a browser and go to http://localhost:8000
 * Enter
   host: localhost
   port: 5959
 * Click start

Expected behaviour:
Guest UI is displayed correctly.

Actual behaviour:
Guest UI gets inverted on refresh.

[Regression Potential]

 * This component may be used with openstack and it's possible that
there are workarounds in place, so they may start working incorrectly.

[Other Info]

 * Part of this fixed is included cosmic and onwards (spice-html5
0.1.7-3).

[1] https://fedorapeople.org/groups/virt/virtio-win/direct-downloads
/latest-virtio/virtio-win.iso

** Affects: spice-html5 (Ubuntu)
     Importance: Medium
     Assignee: Dariusz Gadomski (dgadomski)
         Status: New

** Affects: spice-html5 (Ubuntu Bionic)
     Importance: Medium
     Assignee: Dariusz Gadomski (dgadomski)
         Status: New

** Affects: spice-html5 (Ubuntu Cosmic)
     Importance: Medium
     Assignee: Dariusz Gadomski (dgadomski)
         Status: New

** Affects: spice-html5 (Ubuntu Disco)
     Importance: Medium
     Assignee: Dariusz Gadomski (dgadomski)
         Status: New


** Tags: patch sts
-- 
Windows guest display is inverted vertically
https://bugs.launchpad.net/bugs/1836361
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