How to get current clip region?

[Jim Shi]

Hi, 

Just want to get current clip region from a canvas, anyone can shed a light on how to do it?

cheers,

Jim

[Cary Clark]

The current clip region is not exposed.

What is your use case? Perhaps there's another way to achieve your end result.

Cary

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[Jim Shi]

thanks Cary.

actually my use case is to save current clip, then set to some new clips, later i want restore the old clip. all these clips are global coords and should be trans matrix independent.

could you help advise the proper way to do so? 

Cheers,

Jim

On Wednesday, 7 March 2018 00:13:32 UTC+11, Cary Clark wrote:

The current clip region is not exposed.

What is your use case? Perhaps there's another way to achieve your end result.

Cary

On Mon, Mar 5, 2018 at 10:32 PM, Jim Shi <jim....@gmail.com> wrote:

Hi, 

Just want to get current clip region from a canvas, anyone can shed a light on how to do it?

cheers,

Jim

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[Yuqian Li]

I think canvas.save and canvas.restore are what you want. For example: https://fiddle.skia.org/c/def2ce5df1c8d7aac47c73534ad32c80

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[Mike Reed]

Skia does not support replacing the current clip. The only call that sorta used to do that, clipRegion(), is going away now.

I think you may need to do something like:

save

concat(inverse_of_ctm_to_create_identity)

clipPath(your_global_clip)

...

restore

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