cc::EffectTree
Blink2862 Marras 2025

cc::EffectTree

The source provides an extensive technical explanation of the Effect Property Tree within the Chromium compositor, which is crucial for managing how visual effects are applied to web content. This tree structure, composed of EffectNodes, decouples effects (such as opacity, filters, and blending modes) from the traditional layer hierarchy to centralize calculations, improving rendering performance. A primary function of the effect tree is determining when content must be rendered into a separate RenderSurface (an offscreen texture) for correct compositing, flagged by the render_surface_reason field for complex needs like filters or non-standard blend modes. The document details the structure of an EffectNode, including fields that track cumulative properties like screen_space_opacity and visibility flags like is_drawn, and explains how the effect tree seamlessly interacts with the Transform and Clip property trees to ensure correct coordinate spaces and boundaries are maintained during effect application. Finally, it addresses the tree's role in facilitating performant CSS animations by allowing real-time property updates on the compositor thread and ensuring stability through element identification.

Jaksot(398)

Blink Main-Thread Scrolling – DOM, Layout, and Lifecycle

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Architecture of Scrolling in Chrome (Blink vs. CC Overview)

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[ext] Web View Transitions: Technical Deep Dive

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Chromium Input Handling Deep Dive: Compositor and Proxy

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Web View Transitions: Technical Deep Dive

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The second source introduces the View Transition API, a modern web platform feature that allows developers to create smooth, animated transitions between different UI states or entire pages by automat...

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Chrome Compositor: Raster-Inducing Scrolling Explained

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Blink Compositor Promotion of CSS Animations

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The technical sources provide an extensive analysis of how the Blink rendering engine (used in Chromium/Chrome) determines whether a CSS animation can be executed on the compositor thread instead of t...

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