How to draw simple forms in PF_EFFECTWORLD / PF_LAYERDEF
Hi, AE community!
Maybe my question is a little bit strange, but I'll try 
Is there (in SDK) a methods to create visual forms like circle or oval, line, maybe something like a point with color and feather?
What I want to get:
Read data (color, position) from source layer/composition and create small forms with the same brightness and the same position in new world, then blend it with output.
Available solutions I see:
1. Using suites, like a
Suites.FillMatteSuite2()->fill()
with a circle form in arguments. Fill() receive a PF_Rect, I know, but maybe it have a similar solution not declared in SDK_Guide?
2. Using DrawBot with arcs or similar paths with fill.
I found different practices in examples "ColorGrid" and "CCU", but using DrawBot confuses me, because in my project used flag PF_OutFlag_NON_PARAM_VARY and I must call Render function every time to calculate particles position and move them. With DrawBot (as I understand from Guide) I must use DrawBot only in Draw Event. Or maybe this is whole wrong way and DrawBot don't created for tasks like my.
3. Using iterate suites.
In example projects I found complex loops with iterate input world and draw pixels in special for circle area (If I understood it). In other words, I can create array with (special for my task) pixel coordinate system, create points for particles in this array, then loop over this array and move to the same in output world. Ok, if this right way, then I must use math for calculate ovals, or circles, then calculate feathers or aliasing for this forms. The problem clearly requires computing power 
Maybe all this solutions is wrong and I can use another way to solve my task? Maybe there are some functions to draw different forms and I missed them in SDK Guide? I'm afraid to reinvent a wheel, because so far obtained only square 
Anyway, thanks for any advise or way to solve my problem!
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