Chrome Compositor Transform Updates on Scroll
Blink2864 Okt 2025

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 PropertyTrees. The core mechanism for efficiency relies on granular dirty state propagation: when a property changes (like a scroll offset or animation), only the affected TransformNodes are marked as dirty (needs_local_transform_update) rather than forcing a full re-evaluation of the entire scene. The process, governed by UpdateTransformTree, ensures that changes—including complex interactions like elastic overscroll, fixed/sticky positioning, and pinch-zoom—are translated into updated screen-space layer matrices (transforms) by traversing only the dependent edges, thereby minimizing computational cost during each render frame. The sources clarify the tight coordination between the ScrollTree (which tracks offsets) and the TransformTree (which incorporates those offsets into actual layer movement matrices).


Avsnitt(403)

Trees in Viz: Chrome's Centralized Compositing Engine

Trees in Viz: Chrome's Centralized Compositing Engine

The source details a significant re-architecture of the Chromium rendering pipeline, known as JellyMander, centered on the feature Trees in Viz (TiV). This change shifts the core task of frame composi...

30 Nov 202530min

PaintLayerPainter: Blink's Bridge from Layout to Rendering

PaintLayerPainter: Blink's Bridge from Layout to Rendering

The source material provides an exhaustive technical analysis of Blink’s PaintLayerPainter, the central coordinator responsible for executing the CSS painting algorithm to generate visual output. This...

30 Nov 202541min

Blink Property Trees: Scene Graph for Compositing

Blink Property Trees: Scene Graph for Compositing

The sources provide a comprehensive technical analysis of the Paint Property Tree Builder (PPTB) in Blink, which is the mechanism responsible for creating the crucial intermediate data structures know...

30 Nov 202540min

The Architecture of Chromium's Safe Callback Cancellation

The Architecture of Chromium's Safe Callback Cancellation

The source material provides a comprehensive examination of Chromium's CancelableCallback utility, which was introduced to allow for the safe and explicit cancellation of tasks that have been schedule...

29 Nov 202539min

B6: RenderProcessHost: Lifecycle and Architecture Management

B6: RenderProcessHost: Lifecycle and Architecture Management

The provided documents outline the essential functions of the RenderProcessHost (RPH), a crucial component within Chromium's multi-process architecture that resides in the browser process to manage a ...

28 Nov 202532min

B5: Platform View Architecture

B5: Platform View Architecture

The source provides an architectural overview of Layer 5 in Chromium, which is responsible for interfacing the browser’s content output with the native operating system view layer. This layer is struc...

28 Nov 202533min

B4: Render Host Layer: RVH and RWH

B4: Render Host Layer: RVH and RWH

The technical documentation provides an extensive overview of two crucial browser-side components in Chromium's multi-process architecture: the RenderViewHost (RVH) and the RenderWidgetHost(RWH). The ...

28 Nov 202539min

B3: RenderFrameHost: Core Document Lifeline

B3: RenderFrameHost: Core Document Lifeline

The source documentation provides a detailed analysis of the RenderFrameHost (RFH) and its implementing class, RenderFrameHostImpl, which constitute the essential browser-side representation of every ...

28 Nov 202534min

Populärt inom Teknik

uppgang-och-fall
bilar-med-sladd
market-makers
elbilsveckan
rss-elektrikerpodden
bosse-bildoktorn-och-hasse-p
rss-veckans-ai
skogsforum-podcast
rss-laddstationen-med-elbilen-i-sverige
natets-morka-sida
bli-saker-podden
garagehang
developers-mer-an-bara-kod
rss-it-sakerhetspodden
rss-digitala-influencer-podden
rss-en-ai-till-kaffet
rss-technokratin
toms-laskpodd-och-annat
cyber-chats-chill
rss-racevecka