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Add documentation for the 'svgio' module

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The module 'svgio' is used to read SVG. This is
the list of topics discussed in the documentation:

* Introduction
* How does it work?
* Known Bugs
* Dependencies
* Related Software
* References

Change-Id: If42e9c2e10145c12cd5d74019b36bc5d78dd5bb9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/124178
Tested-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
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Hossein 2021-10-26 11:47:53 +02:00 committed by Ilmari Lauhakangas
parent 4c982dbafd
commit f7e351d7ef
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svgio/README.md
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# SVG Reader
It contains `svgio/source/svgreader` which is used for "Insert -> Picture -> From File".
## Introduction
The **svgio** module is used to read **SVG** (Scalable Vector Graphics[1])
files. It is an XML based format for vector graphics.
This module contains `svgio/source/svgreader` which is used for embedding an
SVG file with "Insert -> Picture -> From File".
SVG is an open standard provided by the World Wide Web Consortium (W3C).
[1] [Scalable Vector Graphics](https://en.wikipedia.org/wiki/Scalable\_Vector\_Graphics)
## How does it work?
`svgio` module uses sax for reading xml and turns it into `drawinglayer` primitives.
The rendering is done via `drawinglayer` primitives. For more information, you should
refer to [drawinglayer](../drawinglayer) documentation.
## Known Bugs
Known remaining bugs for this module are gathered here:
* [Bug 88278 - [META] SVG import image filter (all modules)](https://bugs.documentfoundation.org/show\_bug.cgi?id=88278)
## Dependencies
Direct dependencies for **emfio** are [**drawinglayer**](../drawinglayer) and
[**sax**](../sax).
## Related Software
* [librsvg](https://en.wikipedia.org/wiki/Librsvg)
* [SVG++](http://svgpp.org/)
## References
Documentation for the SVG format is available on the W3C website:
* [SVG page at W3C](https://www.w3.org/Graphics/SVG/)
* [SVG primer](https://www.w3.org/Graphics/SVG/IG/resources/svgprimer.html)