[Libreoffice-bugs] [Bug 124709] New: Black background on surrounding GL canvas after slideshow

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124709

            Bug ID: 124709
           Summary: Black background on surrounding GL canvas after
                    slideshow
           Product: LibreOffice
           Version: 6.3.0.0.alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Keywords: bibisected, bisected, regression
          Severity: normal
          Priority: medium
         Component: graphics stack
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: baron at caesar.elte.hu
                CC: mikekaganski at hotmail.com, vmiklos at collabora.com
            Blocks: 93529

Created attachment 150720
  --> https://bugs.documentfoundation.org/attachment.cgi?id=150720&action=edit
Screenshot

This requires a tiny bit of preparation: have a full-screen
hardware-accelerated browser window in the background (Firefox, Chrome, both
are fine).

- Start Impress with OpenGL enabled, in a window.
- Run full-screen presentation.

=> After finishing the presentation, the background window becomes black.
See attached screenshot, I moved the LO window a bit to reveal some of the
browser window.

Bibisected to the following commit using repo bibisect-win32-6.3. I assume
something in the GL code relied on the previous, incorrect values from the
fixed functions.

https://cgit.freedesktop.org/libreoffice/core/commit/?id=dd199ccb46c036713c704a23e137d04623936e47
author  Mike Kaganski <mike.kaganski at collabora.com>     2019-02-17 16:30:55
+0300
committer       Mike Kaganski <mike.kaganski at collabora.com>     2019-02-18
09:28:19 +0100

tdf#98896: GetWidth/GetHeight vs getWidth/getHeight strikes back!


Referenced Bugs:

https://bugs.documentfoundation.org/show_bug.cgi?id=93529
[Bug 93529] [META] VCL/OpenGL rendering tracker bug for 5.0+
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