Animation Pipeline: Main Thread to Compositor
Blink28625 Sep 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.

Avsnitt(389)

Evolution of CSS: Working Group Drafts and Processes

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The provided text outlines the operations and standardizing procedures of the W3C CSS Working Group, which manages the evolution of web presentation through a modular specification system. It details ...

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5 View Transition Mechanics: Pre-paint and Snapshot Coordination

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The provided text explains how the Blink rendering engine manages view transitions by utilizing a stable coordinate space known as the snapshot root. This mechanism ensures that animations remain cons...

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4 Blink View Transition Pseudo-Element Tree and Layout Integration

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[GENERAL] Modern CSS Scroll Positioning and Visibility Specifications

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These sources collectively define the technical standards for how web browsers handle scrolling and element visibility. The documentation details the CSSOM View Module's specific algorithm for the scr...

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Modern CSS Scroll Positioning and Visibility Specifications

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These sources collectively define the technical standards for scroll-into-view behavior within modern CSS specifications, covering how elements are positioned and animated when navigated to or targete...

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Chromium Unified Test Runner: Architecture and Workflows

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The Unified Test Runner (UTR) is a specialized developer tool designed for the Chromium project to eliminate discrepancies between local testing and Continuous Integration (CI) environments. By utiliz...

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CSS Multi-Column Layout Modules 1 and 2

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The provided text outlines the evolution and technical mechanics of CSS Multi-Column Layout, moving from the foundational features of Level 1 to the advanced proposals in Level 2. It explains how the ...

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