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(397)

blink::LocalFrameView

blink::LocalFrameView

orchestrates style → layout → pre‑paint/paint for a frame. This is the workhorse that actually runs lifecycle phases. On a frame tick from WebFrameWidgetImpl, it goes through style recalc, layout (Lay...

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blink::LocalFrame

blink::LocalFrame

the document host and local‑root boundary.
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blink::Page

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the page container and animation clock keeper. Page holds frame trees and the PageAnimator that services script‑driven animations on each tick. It’s the top‑level context for the document/view that We...

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blink::WebFrameWidgetImpl

blink::WebFrameWidgetImpl

renderer‑main entry to Blink’s lifecycle. This is where a compositor BeginFrame (coming in via content/public and mojo plumbing) first turns into Blink work on the renderer main thread. It receives th...

9 Loka 202532min

Blink's ComputedStyle: An In-Depth Analysis

Blink's ComputedStyle: An In-Depth Analysis

The collection of sources provides a detailed technical analysis of the ComputedStyle object within Blink, the rendering engine for Chromium. The primary source, an in-depth analysis document, explain...

9 Loka 202545min

Chromium LayerContext Deep Dive: RenderingNG and Scroll Updates

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The source material, primarily an excerpt from a 2025 technical report, provides an in-depth analysis of the LayerContext abstraction within the Chromium RenderingNG pipeline, specifically when the br...

8 Loka 202532min

[ext] Blink's Paint Property Tree Builder: A Surgical Tour of Dragons

[ext] Blink's Paint Property Tree Builder: A Surgical Tour of Dragons

(Make it over 20000 words) source text provides an extremely detailed, technical overview of the blink::PaintPropertyTreeBuilder class in Chromium, which is responsible for building the rendering pipe...

7 Loka 20251h 36min

Blink's Paint Property Tree Builder: A Surgical Tour of Dragons

Blink's Paint Property Tree Builder: A Surgical Tour of Dragons

The source text provides an extremely detailed, technical overview of the blink::PaintPropertyTreeBuilder class in Chromium, which is responsible for building the rendering pipeline's four synchronize...

7 Loka 202543min