cc::Viewport: Engine of Compositor Interaction
Blink28627 Syys 2025

cc::Viewport: Engine of Compositor Interaction

The source provides a detailed architectural examination of Chromium’s cc::Viewport class, which is a critical, stateful controller within the rendering engine's compositor responsible for all high-performance viewport interactions. It explains that the class manages the complexity of the dual-viewport model, which separates the static Layout Viewport from the user-visible Visual Viewport to enable smooth pinch-zooming without expensive relayouts. The analysis traces how cc::Viewport facilitates compositor-threaded scrolling and zooming by translating user input gestures into highly efficient mutations of the Property Trees, specifically the ScrollTree and TransformTree. Ultimately, the text establishes that this specialized component is the engine enabling a fluid user experience by isolating high-frequency tasks from the main rendering thread.

Jaksot(399)

CSS Keywords and Blink Rendering Engine

CSS Keywords and Blink Rendering Engine

These sources provide a detailed technical history of CSS keywords and features, tracing their evolution from the foundational CSS1 (1996), which introduced the box model and basic typography, through...

16 Loka 202553min

View Transitions

View Transitions

View transitions

16 Loka 202528min

CSS Backdrop-Filter

CSS Backdrop-Filter

The sources provide an extensive technical explanation of the CSS backdrop-filter property within Google Chrome's Blink rendering engine. This deep dive details how the feature, which allows filters l...

16 Loka 202524min

Intersection Observer

Intersection Observer

The sources provide an in-depth explanation of the Intersection Observer API within the Blink rendering engine, focusing on its architecture and implementation to improve web performance. The initial ...

16 Loka 202544min

Chrome Compositor Animation Architecture (cc)

Chrome Compositor Animation Architecture (cc)

The sources provide an extensive architectural overview of the Chrome Compositor Animation (cc) subsystem, which is responsible for executing visual animations like transforms and opacity changes effi...

15 Loka 202541min

Blink's Graph Data Structures and Traversals

Blink's Graph Data Structures and Traversals

The text provides an extensive overview of the graph-structured data structures used within Blink, Chromium's rendering engine, detailing how web content is processed from initial input to final displ...

13 Loka 202539min

blink::PropertyTreeManager

blink::PropertyTreeManager

bridges Blink property trees → cc property trees. Given Blink’s Transform/Clip/Effect/Scroll nodes (from paint property trees), this class creates/updates the cc counterparts (cc::TransformNode, cc::C...

10 Loka 202546min

blink::PaintArtifactCompositor

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...

10 Loka 202529min