blink::PaintArtifactCompositor
Blink28610 Okt 2025

blink::PaintArtifactCompositor

turns chunks into compositor layers & updates cc property trees.

Consumes the new PaintArtifact and does the layerization and property‑tree updates required for compositor draw. It supports fast paths when only values changed (e.g., opacity) or when a scroll only induces raster invalidation, avoiding full rebuilds. It owns a subtree of cc layers corresponding to the artifact. (Chromium Git Repositories)

Key fields

  • scoped_refptr<cc::Layer> root_layer_ — root of the Blink‑owned layer subtree.

  • UpdateType needs_update_ — kRepaint vs kFull (or scroll fast path).

  • Caches/maps for synthesized mask clips and scroll translations seen while layerizing. (Chromium Git Repositories)

Most important methods

  • bool TryFastPathUpdate(const PaintArtifact&) — take a cheap path (no topology change). (Chromium Git Repositories)

  • void Update(const PaintArtifact&, const ViewportProperties&, const StackScrollTranslationVector&, Vector<std::unique_ptr<cc::ViewTransitionRequest>>) — full reconciliation to layers + cc property trees. (Chromium Git Repositories)

  • “Direct update” helpers like DirectlyUpdateCompositedOpacityValue(...), DirectlyUpdateScrollOffsetTransform(...) — skip rebuilds for common animations/scrolling. (Chromium Git Repositories)

Hands off to: PropertyTreeManager (internally) to mirror Blink property nodes to cc trees, ready for commit to the compositor thread.


Avsnitt(397)

Mastering Scroll Chaining and Overscroll Behavior in CSS

Mastering Scroll Chaining and Overscroll Behavior in CSS

The provided text outlines the development and implementation of the overscroll-behavior CSS property, a standardized tool used to manage how browsers respond when a user reaches the edge of a scrolla...

5 Jan 39min

CSS Scroll Snap: Chromium Implementation and Specification

CSS Scroll Snap: Chromium Implementation and Specification

This documentation provides a comprehensive analysis of CSS Scroll Snap, specifically focusing on its technical implementation within Chromium’s Blink engine. It details how Level 1 specifications all...

5 Jan 31min

Implementing Scroll-Driven Animations in CSS and Blink Architecture

Implementing Scroll-Driven Animations in CSS and Blink Architecture

This text details the development and technical mechanics of CSS scroll-driven animations, a modern web feature that links animation progress to a container's scroll position rather than traditional c...

5 Jan 42min

Web Scrolling Mechanics: Focus and Viewport Synchronization

Web Scrolling Mechanics: Focus and Viewport Synchronization

Modern web standards and browser engines utilize sophisticated mechanisms to manage how elements are scrolled into view during navigation or script execution. CSS properties like scroll-padding and sc...

5 Jan 30min

Single-Axis Scroll Containers: Motivation and Implementation

Single-Axis Scroll Containers: Motivation and Implementation

The provided text details a technical implementation in the Blink rendering engine that enables single-axis scroll containers, allowing an element to scroll in one direction while remaining visible or...

3 Jan 31min

[EXTENDED] Blink and CC Thread: Implementing Position Sticky

[EXTENDED] Blink and CC Thread: Implementing Position Sticky

The provided text describes the technical workflow for managing sticky positioning within the Blink rendering engine and the Chromium compositor. This process begins on the main thread, where the engi...

2 Jan 42min

Blink and CC Thread: Implementing Position Sticky

Blink and CC Thread: Implementing Position Sticky

The provided text describes the technical workflow for managing sticky positioning within the Blink rendering engine and the Chromium compositor. This process begins on the main thread, where the engi...

2 Jan 31min

Paint Property Tree Testing: A Deep Dive

Paint Property Tree Testing: A Deep Dive

The provided text explains the PaintPropertyTreeBuilderTest, a C++ unit test suite within the Blink rendering engine of Chromium. This suite is essential for verifying the paint property trees—specifi...

2 Jan 35min

Populärt inom Teknik

uppgang-och-fall
elbilsveckan
market-makers
bilar-med-sladd
natets-morka-sida
rss-elektrikerpodden
rss-laddstationen-med-elbilen-i-sverige
rss-veckans-ai
skogsforum-podcast
bli-saker-podden
bosse-bildoktorn-och-hasse-p
rss-uppgang-och-fall
rss-en-ai-till-kaffet
rss-ai-med-katarina-gospic-och-viggo-cavling
rss-technokratin
developers-mer-an-bara-kod
rss-digitala-influencer-podden
rss-sogeti-sweden-podcasts
rss-fabriken-2
rss-snacka-om-ai