blink::GraphicsContext
Blink28610 Loka 2025

blink::GraphicsContext

immediate drawing API that records to a display list.

Painters for layout objects use GraphicsContext to “draw”—but in modern Blink those calls get recorded into a display list (PaintRecord) backed by Skia commands. This recording is scoped and batched between BeginRecording(...)/EndRecording(). (Chromium Git Repositories)

Key methods (how display items get their pixels)

  • Recording: BeginRecording(const FloatRect&) → sk_sp<PaintRecord> EndRecording() — wraps a run of drawing commands for later replay. (Chromium Git Repositories)

  • Draw ops (representative): DrawRect, DrawImage(...), DrawText(...), BeginLayer/EndLayer — the stuff that becomes Skia ops inside display items. (Chromium Git Repositories)

Important fields

  • cc::PaintCanvas* canvas_ (owned by recorder), PaintRecorder paint_recorder_ — actual recording guts;

  • float device_scale_factor_, state stacks/flags — needed for correct pixel snapping/appearance. (Chromium Git Repositories)

Hands off to: PaintController, which packages these recorded ops into chunks/items.


Jaksot(392)

Oilpan: The Garbage Collector for Blink in Chrome

Oilpan: The Garbage Collector for Blink in Chrome

Oilpan is a specialized garbage collection system for the Blink rendering engine in Chrome, specifically designed to manage C++ objects and eliminate memory safety issues like use-after-free bugs. It ...

11 Helmi 38min

Iframe Layout Coordination and Cooperative Sizing in Blink

Iframe Layout Coordination and Cooperative Sizing in Blink

The provided text describes the technical evolution of iframe layout coordination within Google's Blink rendering engine. Traditionally, browsers treat iframes as isolated boxes with a default size of...

9 Helmi 37min

Chrome Scheduler: Frame Orchestrator

Chrome Scheduler: Frame Orchestrator

9 Helmi 35min

Blink Rendering Engine: Frame, Document, and View Lifecycle

Blink Rendering Engine: Frame, Document, and View Lifecycle

In the Blink rendering engine, LocalFrame, LocalFrameView, and Document form a specialized triad that manages the structure and display of web content. The LocalFrame acts as the primary controller fo...

8 Helmi 34min

Pixel Snapping in Blink's Paint Property Trees

Pixel Snapping in Blink's Paint Property Trees

Blink’s rendering engine utilizes paint property trees and snap offsets to balance high-precision layout with visual clarity. While the layout engine calculates positions using fractional units for ac...

8 Helmi 31min

Chromium Blink: Scroll-Triggered Animations on the Compositor Thread

Chromium Blink: Scroll-Triggered Animations on the Compositor Thread

This document explores the technical implementation of scroll-triggered animations within Chromium's Blink engine and compositor. Unlike traditional scroll-driven effects that track movement continuou...

6 Helmi 31min

Blink and Chromium: The JavaScript Execution Pipeline

Blink and Chromium: The JavaScript Execution Pipeline

This documentation provides a technical deep dive into Blink’s JavaScript execution pipeline, explaining how Chromium orchestrates the transition from HTML parsing to code evaluation. It details the r...

6 Helmi 31min

Evolution of CSS clip-path in Web Standards and Blink

Evolution of CSS clip-path in Web Standards and Blink

The provided text outlines the evolution and technical implementation of the CSS clip-path property, which allows developers to create non-rectangular regions for web content. It details how the stand...

6 Helmi 36min