How to get mask / path size?

[Richard Rosenman]

Hi gang!

Hope everyone is doing well.

I have a relatively simple question this time: what is the best approach to get the mask size within a layer?

By that, I mean the extents of the mask? So if I have a composition that is 1920x1080 and I have drawn a circle mask in it, with a size of 255x255, that is the size that should be reported.

I know I could read the mask and then loop through all the vertex positions to record the minimum and maximum x & y but is there a simpler (and less intensive) process than that?

Thanks in advance!

-Rich

[Mylenium]

No.

Mylenium

[shachar carmi]

going through the vertices is the fastest way i know of.

[ShiveringCactus]

I think these days, with Track Mattes able to be reused and not having to be directy above a layer, if I need to know a circular masks size, I'd be tempted to use a shape layer as a track matte.  This gives me all the transform properties and allows for easier changing etc...  If you're using a mask for effects (as opposed to cutting out), you might still be able to get away with a track matte with an adjustment layer, but that all depends on the context. 

[James Whiffin · Accepted solution]

This should do the trick and it returns in floating point precision:

Given a layer’s handle and a time, returns the bounds of area visible with masks applied.

AEGP_GetLayerMaskedBounds

[Richard Rosenman]

Hi James!

Thanks for your helpful reply. After some research I was able to successfully use GetMaskedBounds to get the mask extents. Certainly much easier (and faster) than looping through all the verts!

Thanks again,

Richard