https://bugs.freedesktop.org/show_bug.cgi?id=47341

             Bug #: 47341
           Summary: Fade in and out animation of transparent object goes
                    wrong
    Classification: Unclassified
           Product: LibreOffice
           Version: LibO 3.5.1 RC2
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: major
          Priority: medium
         Component: Presentation
        AssignedTo: [email protected]
        ReportedBy: [email protected]


Created attachment 58482
  --> https://bugs.freedesktop.org/attachment.cgi?id=58482
Demonstration of the fade in and out rendering

In the attached sample file there are two transparent rectangles in front of
other object. The rendering of the fade in and out of those rectangles is
incorrect. This was already a bug in some versions of OOo, but it still had
worked correctly in LO 3.3.4.

For fade in, the rectangle should be invisible at first and then slightly cover
the background object until reaching its final state with correct transparency.
Instead, the rectangle goes to the opaque state - hiding the background totally
- and then suddenly assumes the correct transparency.

For fade out, this wrong behavior proceeds in reverse order.

Since LO3.5.1rc2 has a general rendering bug while using hardware acceleration,
I switched this feature off for this demo.

My system is Windows Vista, but I think the same problem will be present in
other OS.

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