tree 7dd520f66353af1c8d522a7cd6a433dae213daf1
parent 01d5ec8b9faae9790c3380d3ff9ad2256d13d480
author Florin Malita <fmalita@chromium.org> 1549982001 -0500
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1549983665 +0000

[sksg] Hit-testing API

Introduce RenderNode::nodeAt(const SkPoint&) as the entry point for the hit-testing API.

This is backed by a onNodeAt() virtual, which gets dispatched throughout the render DAG,
and normally stops at the first leaf Draw node in encounters.

To support the implementation, introduce a GeometryNode::contains(const SkPoint&) API.

This is backed by a onContains() virtual, overridden in each concrete geometry class.

Expose nodeAt() on sksg::Scene, and add some basic unit tests.

Change-Id: I0c8abd9d1e51ecf2d8b4dd699f325cd636e21084
Reviewed-on: https://skia-review.googlesource.com/c/191296
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>