Animation Pipeline: Main Thread to Compositor
Blink28625 Syys 2025

Animation Pipeline: Main Thread to Compositor

The sources provide an extensive architectural overview of the Chromium animation pipeline, detailing the complex process required to accelerate animations by moving them off the main thread onto the compositor thread (cc). The explanation outlines the flow, starting when an animation is initiated in the Blink renderer via classes like Animation and KeyframeEffect, especially if the animation targets compositor-capable properties like transform or opacity. This main thread state is prepared for transfer during the PreCommit phase, where the main thread's AnimationHost creates corresponding compositor objects. The sources then explain the Commit process, where the CommitState structure facilitates the safe synchronization of this animation data to the compositor thread's AnimationHost and ElementAnimations object. Finally, the text describes how animations run on the compositor, ticking every frame and applying values directly to the property trees before sending synchronization events back to Blink regarding start and completion times.

Jaksot(391)

blink::Page → blink::LocalFrame / LocalFrameView

blink::Page → blink::LocalFrame / LocalFrameView

The document’s frame & viewport; LocalFrameView is the scrollable root that triggers layout/paint when needed. provided source outlines the fundamental components of the Blink rendering engine, specif...

21 Syys 202539min

blink::WebViewImpl

blink::WebViewImpl

The source text provides an in-depth explanation of the blink::WebViewImpl class within Chromium's Blink rendering engine, characterizing it as the central control point on the renderer's main thread ...

20 Syys 202539min

cc::LayerTreeHost in Chromium's Compositor

cc::LayerTreeHost in Chromium's Compositor

The source provides an extensive technical explanation of the cc::LayerTreeHost class, which acts as the central main-thread component in the Chromium compositor architecture. It details how this comp...

20 Syys 202537min

cc:: Scheduler / SchedulerStateMachine

cc:: Scheduler / SchedulerStateMachine

Drives the frame loop on the compositor thread (BeginFrame → Animate → Commit → Draw), deciding when to ask Blink for a new frame or to draw with existing state.

20 Syys 202548min

Chrome Interactions Team: Key Class Reference

Chrome Interactions Team: Key Class Reference

The sources provide an extensive reference guide detailing the key classes and infrastructure involved in handling user interactions—specifically scrolling, gestures, and input—within the Blink and Ch...

20 Syys 202553min

Essential Unix, Git, and Development Commands

Essential Unix, Git, and Development Commands

This comprehensive reference document provides an essential overview of commands used in a Unix-like environment, primarily focusing on Linux/macOS command-line operations and the specialized workflow...

20 Syys 202541min

Chromium and Blink Developer Command Reference

Chromium and Blink Developer Command Reference

The collection of sources provides a comprehensive guide to developing within the Chromium project, focusing heavily on command-line tools and workflows essential for engineers, particularly those wor...

19 Syys 202543min

Chrome Interaction Systems: Scrolling, Animations, and Input

Chrome Interaction Systems: Scrolling, Animations, and Input

The source material provides a detailed examination of Chrome’s architecture and how it manages user interactions like scrolling, animations, and input handling to ensure web pages feel smooth and res...

19 Syys 202526min