support importing a background to canvas about drawableview

[PaNaVTEC]

At this time you can use "drawableView.setBackground..." But I don't think is a good idea because at each draw will re-paint the background + gestures. I will think on that.

[omidaminiva]

yes I agree it is not a good idea since you cannot choose the scaletype for background. I will look forward to see this feature on this library.

[PaNaVTEC]

In the develop branch you can set background color and border color for canvas. I will look for a better solution for draw a bitmap.

[omidaminiva]

I tried the bg color and border and it works great.

[jongha]

Nice. When it will stable release?

[amigax]

did this ever get done ?

[PaNaVTEC]

As I was saying previously, nothing stops you to do: drawableView.setBackground...

The optimization for that never got implemented, feel free to submit PRs with a better implementation, I will gladly take a look and merge it 👍

[amigax]

Thanks I managed to hack a solution together, will make it more elegant. But basically it involves painting a bitmap and scaling it up to the canvas size, it runs fast if the bitmap is not huge :) Great lib btw, thank you for your hard work.

[amigax]

Actually I really cannot understand why the background is getting scaled each time even when it is in a different view behind this one. Real shame.

[JorgeAmVF]

I tried the bg color and border and it works great.

@omidaminiva, could you, please, inform how did you achieve that?

I tried using the develop-branch methods, however, I couldn't achieve that not even by setting the background programatically as it gets the color, but when I save the image into the gallery, it gets a black background as if it's transparent and whether I set the background from the layout it gets over the drawing stroke.

I might be overlooking something, so any help would be appreciated.