[Libreoffice-bugs] [Bug 136289] Control image transparency by a gradient

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=136289

--- Comment #4 from csongor at halmai.hu ---
(In reply to Regina Henschel from comment #2)

> And for doing similar inside LibreOffice, there exists two workarounds:
> A) You can put the transparency gradient on the text shape.
> B) You can convert the image "to contour" and apply a transparency gradient
> then.
> 
> And for a quick access to an external image editing application, the context
> menu of an image has got the item "Edit with External Tool".
> 
> So my take for this is a "wont fix".

Thank you for your feedback, Regina. 

I am not sure I understand your solutions. Could you add sample files or a
step-by-step description of what you mean by A) and B), please?

The problem with an external editor (like GIMP) is the following. If I change
the transparency of an image in GIMP and put the result into the Writer
document then the transparency cannot be changed in the future any more. A
co-author needs the original image and they need to recreate the image with
different transparency. By contrast, if transparency could be adjusted within
Writer then a co-author could change the parameters of the transparency within
Writer. I think this is a huge difference that is worth the extra development. 

If you say that the core developer team has no capacity for implementing and
maintaining this feature then I understand it. But in that case, there is
another solution that should be considered. It is a huge development but it
would sky-rocket the capabilities of LO. 

It would be nice if LibreOffice would be able to receive 3rd party filters
(aka. add-ons). That is, LO should specify an API for how the images should be
handled. 

Such a filter add-on could be the transparency setting. A user, who has the
installed filter, could specify the opacity of different areas of the image. If
the co-author wants to edit it, then they need to install the same filter. If
somebody doesn't want to install the filter then they will see the original
(unfiltered) version of the image with constant default transparency.

If there was such a filter functionality, my old dream also could be achieved.
LO could replace hi-resolution images during everyday work and show the final
resolution of it if it is explicitly requested. This could speed up the editing
phase tremendously.

There could be a filter repository for LO, like there is one for Firefox at
https://addons.mozilla.org/en-US/firefox/

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