[Libreoffice-bugs] [Bug 136652] Do not write "VCLMTF" replacement image for math formula

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=136652

--- Comment #2 from Regina Henschel <rb.henschel at t-online.de> ---
(In reply to V Stuart Foote from comment #1)
> OK, but isn't VCLMTF (aka SVM2) a vector meta, not a bitmap representation?
> Rather than holding object replacement as PNG, why not SVG or EMF+?

Rendering of SVG or EMF+ is not so common. Especially if an application is not
able to render MathML, then it is likely, that it cannot render SVG or EMF+
too. WMF might work. Our ancient HTML export uses gif. But I thing, png is most
common.

> 
> But I'm unclear about where the ObjectReplacements directory contents of an
> ODF archive would even be used. If it is not needed for LO, AOO or MS Office
> does it need to be populated?

For example Softmaker uses the replacement object. I have tested gif and png.
Those work for Softmaker. I have not tested wmf.

> It an Obeject Replacement required for sm/MathML formulas?

LibreOffice, AOO or MsOffice need no Object Replacement.

Flat ODF has an Object Replacement in base64 encoding. I have not tested, which
format it is. There it is not needed at all, because only LibreOffice
read/writes flat ODF and for using flat ODF in github or similar this base64
encoded part is rather hindering. So for flat ODF it should be dropped. 

Our export to XHTML has no Object Replacement.

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