Missing DrawAtlas method

[ShirasawaSama]

Due to the need to draw a large number of rectangles, but Skiko did not provide Canvas#DrawAtlas method, and calling drawRect multiple times directly can cause performance degradation.

I don't know if the project leader is willing to add it, but if so, I can make a PR.

[dima-avdeev-jb]

Thanks for Issue. We will discuss in our team

[ShirasawaSama]

After testing, I found that what I really need is Canvas#DrawVertices.

However, there seems to be a problem with this function.

First, the floatarray passed from Java to native code has been copied at least twice.

Secondly, the positionsCount parameter is not really used, so every call must create a ArrayList and then convert to FloatArray, which is also a copy.

Should I close this issue and create a new one? I'm sorry