Custom mode bar buttons are displayed upside down

The mode bar icons that ship with plotly are for some reason flipped vertically. To compensate, plotly applies transformation matrix that includes a vertical flip (the -1 in the following line):

path.setAttribute('transform', 'matrix(1 0 0 -1 0 ' + thisIcon.ascent + ')');

To illustrate: the following example of how to add a custom icon uses a SVG path that looks good, because it is actually an upside down image (I render the SVG inline for comparison): http://codepen.io/bruno-rino/pen/bgowQx

The -1 in the transformation matrix should be configurable. Or else any normal SVG path has to be flipped manually (and I don’t know even how to go about doing that) before it can be used as an icon in the mode bar.

[rreusser]

Perhaps flipy is preferable both since it’s more fully descriptive and since flipx could conceivably be useful too (left right arrows without needing two separate svg assets?)

[etpinard]

Resolved by @vdh 's https://github.com/plotly/plotly.js/pull/2762