[Bug 45817] New: foobar2000 GUI transparency broken (" playlist tab drag target" has opaque background)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45817

            Bug ID: 45817
           Summary: foobar2000 GUI transparency broken ("playlist tab drag
                    target" has opaque background)
           Product: Wine
           Version: 3.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: jimbo1qaz at gmail.com
      Distribution: ---

Created attachment 62277
  --> https://bugs.winehq.org/attachment.cgi?id=62277
foobar2000 tab-drag icon bug (virtualbox)

In foobar2000, dragging a playlist tab (for example Default tab) creates a
T-shaped icon depicting the new position of the tab.

In Wine 3.15 in Debian Virtualbox (KDE with compositor=XRender), the icon is
rendered with a light-green background #eeffc0 instead of transparency. (hmm,
it's byteswapped c0ffee, is this intentional?) When I move my cursor away from
the tab bar, both the cursor and the background color fade out normally.

On my Kubuntu dual-boot without Virtualbox, I get a massive rectangle of
corrupted memory. Maybe my Intel i5-6200U GPU drivers are at fault, as I get
random corruption in KDE including transparent/flickering titlebars without
Wine running. I mostly worked around them by switching to XRender.

--------------

Additionally when I run foobar2000 with Wine without no audio output, and open
Preferences (Ctrl+P) and click on Playback/Output, "Device" is blank and I get
a popup "Please select a valid output device". The bug is the popup's
background appears to be uninitialized memory.

(Fun fact: The popup remains always on top, even when you switch windows and
move them over foobar2000. xkill and clicking the popup does nothing.)

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