Module paint_pass 

Paint pass — walks the BoxTree post-layout and paints each node.

Order per node (top-down):

1. canvas.save()
2. apply transform (CSS transform → Skia matrix)
3. open opacity layer if opacity < 1.0
4. clip to padding-box if overflow != visible
5. paint outset box-shadow
6. paint background
7. paint border (border-radius aware)
8. delegate component-specific paint via PaintDispatcher
9. recurse children sorted by z-index
10. canvas.restore()

The dispatcher hook lets the higher-level crate plug component-specific paint without coupling rustmotion-core to all 51 component types.

Structs

EnrichedHit

A hit enriched with a component kind label, ready for the studio overlay. node_id is stable within a single rendered frame.

HitNode

One clickable node: its layout id and on-screen bounding box.

HitRect

Axis-aligned bounding box of a painted node, in device (video-pixel) coords.

NoopDispatcher

No-op dispatcher (useful for tests where only generic box decoration is exercised).

PaintFrame

Frame-level paint context (timing + viewport).

PlaneCamera

Scene camera resolved at a fixed time, ready for per-plane application.

Traits

PaintDispatcher

Hook to delegate component-specific painting. Implemented by the higher-level crate that owns the actual Component enum.

Functions

paint_tree

Paint a fully-laid-out box tree onto a Skia canvas.

paint_tree_with_hits

Like paint_tree but also returns the per-frame hit-map: the on-screen bounding box of every component-backed node, in paint order. Used by the studio for click-to-select; the video render path uses paint_tree.

parse_color

Type Aliases

HitMap

Hit-test map for a single painted frame, in paint order (so later entries are visually on top).