cc::ScrollTree
Blink2862 Marras 2025

cc::ScrollTree

The source text provides an exhaustive technical overview of the Scroll Property Tree (cc::ScrollTree) within the Chromium compositor architecture, which is critical for enabling smooth, off-main-thread scrolling. It explains that the ScrollTree captures the hierarchy and properties of scrollable elements, utilizing individual ScrollNodes to store geometric data (like content and container bounds) and behavioral flags (such as whether scrolling is handled on the main thread or if scroll snapping is active). Furthermore, the text details how the ScrollTree works in close coordination with the Transform Tree to apply scroll-induced translations and how it manages the entire scrolling lifecycle, from input event hit-testing and scroll latching to handling overscroll and synchronizing scroll offsets back to the main thread (Blink) via commit mechanisms. This system ensures that complex features like pinch-zoom, sticky positioning, and scroll-linked animations operate correctly and efficiently on the compositor thread.

Jaksot(397)

Blink PaintPropertyTreeBuilder: Lifecycle, Operation, and Integration

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Blink's Flat Tree, Slotting, and Shadow DOM Internals

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CSS Values and Units Level 4: The Foundation

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The provided document is an extensive technical overview of the CSS Values and Units Module Level 4, which defines the foundational system for how all values, units, and mathematical expressions are p...

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The Grammar and Parsing of CSS Syntax

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The provided source discusses the critical role of the CSS Syntax Module Level 3 specification as the fundamental grammar and parsing model for the entire CSS platform. This specification, which repla...

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Chromium Feature Toggles: Switches, Flags, and Blink Runtime

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The provided text offers a comprehensive technical overview of the four primary mechanisms utilized in Chromium for toggling features and behaviors at runtime. It distinguishes between command-line sw...

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Chrome's Raster-Inducing Scroll Architecture Deep Dive

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The provided text details the architecture and mechanisms of raster-inducing scrolling within the Google Chrome rendering engine, explaining how Chrome balances scrolling performance with visual quali...

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