https://bugs.documentfoundation.org/show_bug.cgi?id=98275

            Bug ID: 98275
           Summary: PNG image with alpha channel pasted from clipboard has
                    black background
           Product: LibreOffice
           Version: 5.1.0.3 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: LibreOffice
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 123079
  --> https://bugs.documentfoundation.org/attachment.cgi?id=123079&action=edit
pasted transparent image

Pasting (NOT inserting) PNG image with transparent alpha channel displays the
image with a black background, instead of a transparent one. 

This seems identical to bug 33114,
https://bugs.documentfoundation.org/show_bug.cgi?id=33114, but I was advised
there to submit a new bug, as that one was fixed. From the explanations there,
it seems only the bitmap version can be pasted from the clipboard in any LO
tool, not the PNG one. 

Steps to reproduce:
1. Open https://en.wikipedia.org/wiki/File:PNG_transparency_demonstration_1.png
in any browser (tried with FF/Chrome/IE).
2. Copy the image.
3. Paste the image into any LO program. The image appears with black
background, instead of a transparent one.

If the image is saved and then inserted (instead of pasted), all is fine, and
the background is transparent.

I'm quite sure this was present in versions earlier than LO 5, I could try it
with the older versions, but that bug 33114, fixed in 4.2, confuses me.

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