Drawing Datatype

This is a DataTypes superclass for structured art and vector
drawings.
The archive also includes SVG and IFF DR2D DataTypes which
use this superclass.

All use is at your own risk and I do not accept any
responsibility for damage or loss of data incurred through use
of any of the contents of the distribution archive.

If you want to contribute, please email me to be added to the
OpenAmiga.org project.

I've included the public drawingclass header but there is no
example source at this time, other than that at openamiga.org.

KNOWN BUGS
==========
Loading an SVG into Multiviewer, closing Multiviewer and then
loading another SVG will cause svg.datatype to crash.
The workaround is to either run "expunge all" after closing
Multiviewer, or use Multiview for SVGs.

CHANGELOG
=========

drawing.datatype 53.7 (23.02.2021)
dr2d.datatype 53.6 (23.02.2021)
svg.datatype 53.5 (23.02.2012)
* Added basic DTM_WRITE support
* Various bug fixes
* Note these must be updated together due to internal changes.


Previous versions:

drawing.datatype 53.5 (16.02.2021)
* Fixed RastPort clipping

dr2d.datatype 53.4 (16.02.2021)
* Fixed a bug with the wrong method being used, which caused
  missing output or a crash in certain files