Where can I find the source code for how compose d...

# compose

[Koneko Toujou]

Where can I find the source code for how compose draws its contents to the screen?

Specifically the stuff that deals with converting padding/spacing, relative locations and so on, into absolute placement positions for graphics api to render to within the region specified

[romainguy]

There's not a single thing that does that. In particular the graphics pipeline is heavily involved (libhwui and Skia)

[Koneko Toujou]

Hmm is there code that gets whatever Compose needs to draw into Skia for it to draw?

[romainguy]

It's just Canvas and its related APIs like RenderNode

[Koneko Toujou]

Hmm ok

[romainguy]

What are you looking to know/understand exactly?

[Koneko Toujou]

I'm trying to understand how to correctly compute relative and absolute positions with account for margins/padding/position for a hierarchy in relation to parent view and current view

[Koneko Toujou]

As so far I have position in terms of x,y offsets working

But custom width and height, as well as padding, currently breaks my computation of relative and absolute position

[Koneko Toujou]

This is all just geometry calculations that I need to figure out how to correctly do, as I don't need to do any graphical drawing specifically, just calculate rectangular boundaries and hitboxes and drawing positions and such

[romainguy]

It's fairly simple it's pretty much accumulating the left and top position of children while going down the hierarchy, adding up the padding while doing so

[Koneko Toujou]

So how do I account for padding and custom positions and custom widths and heights?