The provided text explains the construction and lifecycle of paint property trees within the Blink rendering engine. These structures, which include Transform, Clip, Effect, and Scroll trees, replace older stacking context systems to represent an element’s visual state more efficiently. Built during the PrePaint phase, the trees capture complex properties like CSS transforms, opacity, filters, and scroll offsets by traversing the layout tree. This system enables Composite After Paint, a modern architecture that separates painting from compositing decisions to optimize performance. Ultimately, these trees are translated into compositor property trees to synchronize Blink’s rendering with the GPU. This unified mechanism allows for selective updates and smoother animations by reusing existing nodes across different frames.
