save Graphics buffer and reuse

[espruino-discuss]

Posted at 2020-10-02 by Abhigkar

I want to preserve the content of Graphics buffer and reuse it later. But when I store in a new Uint8Array it and call graphics.clear(), it clears the saved variable also. See below example.

I am saving g.buffer in fb variable and after calling g.clear(), it clears fb also.

How to resolve this?

>g=Graphics.createArrayBuffer(8,8,8);
=Graphics: {
  buffer: new ArrayBuffer(64)
 }
>g.drawLine(0,0,7,7)
=Graphics: {
  buffer: new Uint8Array([255, 0, 0, 0, 0,  ... 0, 0, 0, 0, 255]).buffer
 }
>var fb = (new Uint8Array(g.buffer))
=new Uint8Array([255, 0, 0, 0, 0,  ... 0, 0, 0, 0, 255])
>print(fb);
new Uint8Array([255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 255])
=undefined
>g.clear();
=Graphics: {
  buffer: new ArrayBuffer(64)
 }
>print(fb)
new Uint8Array(64)
=undefined

[espruino-discuss]

Posted at 2020-10-02 by Abhigkar

I found answer here