How to add alpha channel into image (imperative API)

[hungtooc]

my images:

Here is my code:

// read RGB image
let imageData = Skia.Data.fromBase64(base64_image);
let skimage = Skia.Image.MakeImageFromEncoded(imageData);

// read RGB mask
let maskData = Skia.Data.fromBase64(base64_mask);
let skimask = Skia.Image.MakeImageFromEncoded(maskData);

then how to merge grayscale mask into image?
The expected image will be like this:

[hungtooc]

Hi @wcandillon, until today I have not found a way to solve the above problem.
As far as I know there is no official usage documment for imperative API. And can you show me how to easily research how to use imperative API on my own?

[wcandillon]

Thank to typescript, you can use the code as documentation.
We would be open to a community contribution on this. A nicely generated typedoc documentation that we could put online.