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)

Chromium Tile Raster Transform Propagation Audit

Chromium Tile Raster Transform Propagation Audit

This detailed audit examines the complete code path within Chromium that determines the raster_transform_ property of a cc::Tile, which is an immutable scale and translation used during rasterization....

31 Loka 202528min

Chromium Compositor Tile Raster Transform Path Map

Chromium Compositor Tile Raster Transform Path Map

The source provides an exhaustive technical mapping of how the Tile::raster_transform_ field is initialized and maintained within the Chromium compositor. It explains that this transform, which consis...

31 Loka 202527min

(ALT) Chromium Compositor PictureLayerImpl Deep Dive

(ALT) Chromium Compositor PictureLayerImpl Deep Dive

The source provides an extensive technical overview of the cc::PictureLayerImpl class, a critical component in the rendering architecture of Chromium's compositor, responsible for processing content o...

31 Loka 202540min

Chromium Compositor PictureLayerImpl Deep Dive

Chromium Compositor PictureLayerImpl Deep Dive

The source provides an extensive technical overview of the cc::PictureLayerImpl class, a critical component in the rendering architecture of Chromium's compositor, responsible for processing content o...

31 Loka 202536min

Chromium Compositor Picture Layer Deep Dive

Chromium Compositor Picture Layer Deep Dive

This source provides an extensive, practitioner-focused examination of the Chromium Compositor's PictureLayerImpl class and its associated tiling stack, which manages the rasterization and drawing of ...

31 Loka 202536min

Singing and Memory in Ancient Greek Oral Tradition

Singing and Memory in Ancient Greek Oral Tradition

The source materials offer an extensive analysis of how ancient Greek civilization used music and rhythm as fundamental mnemonic tools for preserving and transmitting cultural knowledge long before wi...

30 Loka 20251h 24min

Chrome Property Trees: Blink vs. Compositor Comparison

Chrome Property Trees: Blink vs. Compositor Comparison

The source provides an extensive technical comparison of the Paint Property Trees (PPTs) used in Chrome's Blink rendering engine and the corresponding Compositor Property Trees (CC) utilized by the co...

30 Loka 202553min

Chrome Blink and CC Finch Experiment Guide

Chrome Blink and CC Finch Experiment Guide

The source material is a comprehensive guide detailing the process for Google Chrome engineers to launch an A/B field trial (experiment) for changes made to the rendering engine (Blink) or the composi...

29 Loka 202544min