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kotlinlang

Hi, I'm working on *Erase* image functionality. I have two images, the first is the original image, while the second is the mask image that has white background with drawn black(with opacity) paths.

I tried the following and used `BlemdMode.DstOut` to erase the black paths in mask from the original image but failed since DstOut works with transparent and opaque not white/black. Could you suggest better solution that lets me erase the black paths while leaving the white in original image as it is?

```Canvas(Modifier.fillMaxSize()){
    drawContext.canvas.withSaveLayer(
        Rect(Offset.Zero, size), Paint()
    ){
        drawImage(image = originalImage)

        drawImage(
            image = whiteBgBlackPathImage, // mask has white BG with black(opacity) path(s)
            blendMode = BlendMode.DstOut
        )
    }
}```


The blend modes that start with `Src` and `Dst` are all about alpha compositing. The `Modulate` and `Multiply` modes should do what you want if you invert the mask (white where you want to keep pixels, black otherwise)

You could also convert your masks to alpha masks