Looking at some treads here, it seems like `Render...

# compose

[mgrazianodecastro]

Looking at some treads here, it seems like RenderNodes are like the DisplayList , but for the purpose to fulfill the compose pipline

[romainguy]

RenderNodes existe with Views too

[romainguy]

To keep it simple: a RenderNode contains a display list

[romainguy]

So yes, Compose uses display lists

[mgrazianodecastro]

Interesting, I've started watching your presentation at

https://www.youtube.com/watch?v=zdQRIYOST64▾

, and I'm in the processing of translating it to the new paradigms of compose. Because of the pandamic, it's weird to think 2018 is 4 years ago lol.

[romainguy]

It really isn't any different with Compose

[romainguy]

The main difference is that a Composable doesn't necessarily map to a RenderNode/DisplayList

[mgrazianodecastro]

what scenarios does it triggers to map to a renderNode? Canvas related ones? 🤔

[Zach Klippenstein (he/him) [MOD]]

I believe each “graphics layer” maps to a render node. So eg the graphicsLayer modifier and placeWithLayer. But we also do it automatically in some other cases, eg I think when a partial alpha is introduced.

[mgrazianodecastro]

placeWithLayer is new to me, interesting in both cases

[romainguy]

Yes, a graphicsLayer is a render node (as opposed to View.setLayerType() which causes a rasterization to a texture; graphicsLayer can do that but only in some cases, for instance if you add alpha < 1.0)

[romainguy]

@Zach Klippenstein (he/him) [MOD] Partial alpha creates a raster layer, that’s slightly different

[mgrazianodecastro]

this is gold