[Libreoffice-bugs] [Bug 135910] New: Transparent objects either possess outlines when none are defined or are completely opaque, depending on export PNG options

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=135910

            Bug ID: 135910
           Summary: Transparent objects either possess outlines when none
                    are defined or are completely opaque, depending on
                    export PNG options
           Product: LibreOffice
           Version: 7.1.0.0.alpha0+ Master
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Draw
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: mwtjunkmail at gmail.com

Description:
Exporting to PNG an ODF's drawing slide with transparent objects leaves those
transparent objects with either a gray/white border around them when no border
was selected, or leaves the transparent objects completely opaque.

Which occurs depends on the output type. If "selection only" is selected, the
transparent objects are opaque.

If one exports the entire slide's contents, the transparent objects are
transparent, but bordered when they should be.

Steps to Reproduce:
1. Launch Draw
2. Insert a picture
3. Draw a shape over the picture
4. Set the shape's border to None
5. Set the shape's transparency to 100% (I also set its color to black)
6. Export the slide either as:
6a. The entire slide
6b. The selected objects only (in this case, all objects were selected).

Actual Results:
When exporting the entire slide, a gray/white border appears around the
transparent object.

When exporting the slide with the "Selection" option checked on the export
dialog box, the transparent objects appear opaque in the final output.

Expected Results:
Regardless of export method, the transparent object should appear transparent,
and should not have border artifacts if a border of None was selected for the
transparent object.


Reproducible: Always


User Profile Reset: No



Additional Info:
Skia rendering selected with anti-aliasing.

Version: 7.1.0.0.alpha0+ (x64)
Build ID: <buildversion>
CPU threads: 8; OS: Windows 10.0 Build 20190; UI render: Skia/Vulkan; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: CL

Tested with the daily build available as of 2020.08.18. I lifted this from the
version.ini file:

BuildVersion=<buildversion>
buildid=82189fdc93ac337e1de3379d678eca6b7654e6fc
ExtensionUpdateURL=http://updateexte.libreoffice.org/ExtensionUpdateService/check.Update
MsiProductVersion=7.1.0.0.alpha0
ProductCode={B9BAD41C-55C4-4886-9539-48BB387F388E}
ReferenceOOoMajorMinor=4.1

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