Chromium Compositor Input: Handler and Proxy Deep Dive
Blink2861 Okt 2025

Chromium Compositor Input: Handler and Proxy Deep Dive

The source provides a detailed technical analysis of how the Chromium web browser manages user input to ensure a responsive and smooth user experience, even when the main thread is occupied. It centers on two critical components operating on the separate compositor thread: the cc::InputHandler and the blink::InputHandlerProxy. The InputHandlerProxy acts as the gatekeeper, receiving events and deciding if they can be handled immediately on the compositor thread for fast results, or if they need to be passed to the main thread. Conversely, the InputHandler is the mechanical engine that directly manipulates the webpage's visual components, such as applying scroll or pinch updates, without waiting for the slower main thread. This architecture enables key features like threaded scrolling, which significantly reduces latency by processing gestures asynchronously.


Avsnitt(392)

blink::NGPhysicalFragment and friends

blink::NGPhysicalFragment and friends

Layout takes the styled DOM and produces a fragment tree of positioned boxes. In modern Blink this is LayoutNG; the core artifact is NGPhysicalFragment, which stores geometry and is used downstream fo...

10 Okt 202537min

blink::StyleEngine

blink::StyleEngine

style invalidation & resolution (recalc). 
Given DOM/style changes since the last frame, StyleEngine computes updated ComputedStyles, manages active stylesheets/media query state, and marks the right ...

10 Okt 202534min

blink::Document & blink::DocumentLifecycle

blink::Document & blink::DocumentLifecycle

states that gate phases. The document owns the DOM and keeps a DocumentLifecycle state machine that ensures we do things in phase order (style before layout, pre‑paint before paint, etc.). Lifecycle t...

10 Okt 202535min

blink::LocalFrameView

blink::LocalFrameView

orchestrates style → layout → pre‑paint/paint for a frame. This is the workhorse that actually runs lifecycle phases. On a frame tick from WebFrameWidgetImpl, it goes through style recalc, layout (Lay...

9 Okt 202544min

blink::LocalFrame

blink::LocalFrame

the document host and local‑root boundary.
The local frame owns the Document and its LocalFrameView. The local root frame coordinates lifecycle for its subtree (including OOPIF boundaries handled late...

9 Okt 202532min

blink::Page

blink::Page

the page container and animation clock keeper. Page holds frame trees and the PageAnimator that services script‑driven animations on each tick. It’s the top‑level context for the document/view that We...

9 Okt 202534min

blink::WebFrameWidgetImpl

blink::WebFrameWidgetImpl

renderer‑main entry to Blink’s lifecycle. This is where a compositor BeginFrame (coming in via content/public and mojo plumbing) first turns into Blink work on the renderer main thread. It receives th...

9 Okt 202532min

Blink's ComputedStyle: An In-Depth Analysis

Blink's ComputedStyle: An In-Depth Analysis

The collection of sources provides a detailed technical analysis of the ComputedStyle object within Blink, the rendering engine for Chromium. The primary source, an in-depth analysis document, explain...

9 Okt 202545min

Populärt inom Teknik

uppgang-och-fall
market-makers
elbilsveckan
natets-morka-sida
rss-elektrikerpodden
gubbar-som-tjotar-om-bilar
skogsforum-podcast
rss-laddstationen-med-elbilen-i-sverige
bilar-med-sladd
rss-technokratin
rss-uppgang-och-fall
bli-saker-podden
rss-it-sakerhetspodden
developers-mer-an-bara-kod
bosse-bildoktorn-och-hasse-p
rss-sakerhetspodcasten
rss-kack-tech-podcast
rss-en-ai-till-kaffet
rss-sogeti-sweden-podcasts
rss-milpodden