Current Overscroll System Architecture Deep Dive
Blink28629 Sep 2025

Current Overscroll System Architecture Deep Dive

The provided document offers an in-depth technical architectural overview of the overscroll system, primarily within the Chromium browser. It explains how browsers handle scroll gestures that go beyond content boundaries to produce effects like elastic bounce, pull-to-refresh, and history navigation (overscroll navigation). Central to this system is the OverscrollController, which resides in the browser process and manages gesture state, working in conjunction with an OverscrollControllerDelegate to execute high-level actions such as reloading a page or navigating history. Furthermore, the document details the compositor's role in generating smooth, platform-consistent visual feedback, like the rubber-banding effect, often using off-main-thread animations for performance. Finally, it notes that developers can use the CSS overscroll-behavior property to customize or disable these built-in browser effects.

Episoder(404)

viz::Display::DrawAndSwap

viz::Display::DrawAndSwap

In Chrome’s rendering pipeline, the Viz service in the GPU process owns a viz::Display object. A Display is responsible for taking aggregated CompositorFrames (produced by the SurfaceAggregator), draw...

5 Okt 202528min

Chrome RenderingNG: Paint Artifact and Compositor Architecture

Chrome RenderingNG: Paint Artifact and Compositor Architecture

source provides an extensive, lecture-style examination of Chrome’s RenderingNG pipeline, specifically focusing on the roles of the PaintArtifact and the PaintArtifactCompositor. The text explains tha...

5 Okt 202534min

Browser Rendering: Calculating Draw Properties

Browser Rendering: Calculating Draw Properties

The source provides an extensive explanation of the internal browser rendering mechanism used in Blink and Chrome, specifically focusing on the CalculateDrawProperties algorithm. This process translat...

5 Okt 202539min

Chrome Compositor Transform Updates on Scroll

Chrome Compositor Transform Updates on Scroll

These sources provide an extensive technical explanation of how the Chrome compositor manages dynamic properties, specifically focusing on transformations and scrolling, using a structure called Prope...

4 Okt 202532min

Chrome Compositor Architecture: LayerTreeHost and LayerTreeHostImpl

Chrome Compositor Architecture: LayerTreeHost and LayerTreeHostImpl

The sources provide an extensive architectural overview of the Chrome cc compositor module, focusing on the collaboration between three critical classes: LayerTreeHost (LTH), LayerTreeHostImpl (LTHI),...

3 Okt 202534min

Chromium Blink's Layer Recycle Tree Optimization

Chromium Blink's Layer Recycle Tree Optimization

The sources provide an extensive technical explanation of the Chromium/Blink rendering pipeline, focusing specifically on the compositor's layer trees and a performance optimization known as the Recyc...

3 Okt 202529min

Chromium Compositor's CalculateDrawProperties: Scrolling and Overscroll

Chromium Compositor's CalculateDrawProperties: Scrolling and Overscroll

The sources provide an extremely detailed, line-by-line breakdown of the Chromium compositor function CalculateDrawProperties, explaining how it prepares the active layer tree for rendering. A primary...

3 Okt 202530min

Git Rebase and Interactive Rebase for Chromium Development

Git Rebase and Interactive Rebase for Chromium Development

The sources provide a comprehensive guide to Git rebasing and interactive rebasing, explaining how these powerful tools rewrite commit history to maintain a clean, linear project record. They detail t...

2 Okt 202536min

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