Retrieve vertices coordinates independently of current viewport

[giomasce]

Would it be possible to use actual vertices coordinates instead of screen coordinates (rounded to integer pixel)? Even when zooming in, still there is a loss of precision when using simplesvg, which may be inconvenient (and not necessarily easy to detect, if an user does not pay enough attention to the documentation).

Moreover, having to zoom in and export all features to have good resolution might not be a good idea for users not actually wanting to export all features (for example in a very big project).