[Libreoffice-bugs] [Bug 42553] New: IMPRESS: Problem with transparency gradient in presentation mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=42553

             Bug #: 42553
           Summary: IMPRESS: Problem with transparency gradient in
                    presentation mode
    Classification: Unclassified
           Product: LibreOffice
           Version: LibO 3.3.0 RC1
          Platform: Other
        OS/Version: Windows (All)
            Status: UNCONFIRMED
          Severity: critical
          Priority: medium
         Component: Libreoffice
        AssignedTo: libreoffice-bugs at lists.freedesktop.org
        ReportedBy: raph_82 at hotmail.com


Created attachment 53110
  --> https://bugs.freedesktop.org/attachment.cgi?id=53110
Problem with transparency gradient

There is a problem with the 'transparency gradient' (linear, axial, radial,
etc) in Impress, when turning to presentation mode. It is a regression from
openoffice, but present since the first version of LibreOffice.

The best way to see it is the following:

1) Make a new slide with black background;

2) Draw a shape and fill area with black (so you have a black shape on black
background);

3) Right click -> Area -> Transparency -> Gradient and choose for instance a
linear one;

4) Start the diaporama (F5) and wait for the rendering: your black form isn't
black anymore !

See test files in attachment for illustration...

Even if this functionnality can be considered as not essential, this bug can be
a big problem, affecting the retro-compatibility with openoffice: for instance,
an enterprise using transparency gradient for its logo (made on OpenOffice) is
very very annoyed !

This bug was reported, but mixed with other problems, in bug 35681. As it was
recently closed, but not completely fixed, I open this one with a specific
description.

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