gosub-io/gosub-engine

Features

• HTML Rendering Pipelines - Transforms parsed HTML documents into pixel data via a pipeline that converts DOM and stylesheets into layout.
• JavaScript Runtime Environments - Functions as a JavaScript runtime environment with a virtual machine and event loop for handling dynamic web logic.
• HTML and CSS Rendering Engines - Implements a full rendering engine that translates HTML markup and CSS styles into pixel data.
• Browser Engines - Provides a full browser engine that implements HTML/CSS parsing, layout computation, and visual rendering pipelines.
• HTML5 Parsers - Implements a specification-compliant HTML5 tokenizer and tree builder to create an arena-based DOM.
• Origin-Based Isolation - Partitions storage areas using top-level origins to prevent cross-site data leakage.
• Generic Web Resource Fetching - Retrieves raw HTML and binary data from web addresses using an asynchronous networking stack with streaming support.
• Font Rasterization Pipelines - Handles font loading and measurement necessary for text shaping across different render backends.
• Rendering Backends - Allows selection of the rendering backend, supporting headless mode, CPU software rendering, or GPU acceleration.
• Cross-Platform Graphics Tooling - Provides pluggable graphics backends including CPU software rendering and GPU acceleration for consistent cross-platform output.
• Web Page Layer Composition - Assembles visible tiles and applies offsets to produce a final frame with fast-path scrolling.
• Graphics Rendering Backends - Ships pluggable graphics rendering backends supporting software rendering, Cairo, and GPU acceleration.
• Tile-Based Rasterization Pipelines - Converts documents into pixel data using a staged, tile-based pipeline compatible with multiple hardware backends.
• Tiled Rasterization Architectures - Employs a tiled rasterization architecture that divides the page into segments to optimize painting and scrolling.
• Visual Layer Composition - Implements a visual layer composition model to handle opacity and sticky positioning by promoting elements to independent layers.
• Web Page Rendering - Interprets HTML and CSS to display web pages in a window using cross-platform graphics backends.
• Flexbox and Grid Layouts - Computes element geometry using specification-compliant Flexbox, Grid, and Table layout algorithms.
• Asynchronous Networking - Provides an asynchronous networking architecture that decouples transmission and reception to manage concurrent page loads efficiently.
• Embedded JavaScript Scripting - Embeds a JavaScript runtime with an event loop and native API bindings to handle dynamic web logic.
• JavaScript Execution Environments - Provides a JavaScript execution environment featuring a virtual machine and event loop for asynchronous tasks.
• XML and HTML Document Parsers - Transforms raw HTML5 and CSS3 source code into structured in-memory document trees.
• Storage Isolation - Implements storage isolation by partitioning cookies and local storage into separate zones to prevent cross-site data leakage.
• Storage Zone Isolation - Separates cookies and storage into distinct zones to ensure data privacy and prevent cross-zone leakage.
• CSS Cascading Engines - Processes CSS text through parsing, selector matching, and cascading to determine final computed values.
• Font Rasterizers - Converts font outlines into pixel bitmaps using a rasterizer consistent with the layout font system.
• CSS Rule Parsers - Parses CSS rules and selectors into structured objects and validates properties against formal grammars.
• Asynchronous Resource Fetching - Implements asynchronous resource fetching using priority queues and request coalescing to optimize network traffic.
• Browser Engines - Functions as a complete HTML5 browser engine that transforms source code into rendered pixels.
• Isolated Browser Contexts - Maintains independent storage and session partitions within the engine to ensure data isolation between contexts.
• Browser Rendering Pipelines - Implements a staged rendering pipeline that converts DOM trees and stylesheets into rasterized tiles.
• Context Isolation Managers - Organizes the runtime into isolated profiles to prevent data leakage and ensure independent state management.
• Event Loop Managers - Coordinates the lifecycle of the scripting runtime, managing timers and event listeners across different browsing contexts.
• Spec-Compliant DOM Builders - Transforms HTML source into a DOM tree following the HTML5 specification including error recovery.
• Web Page Navigation - Loads web pages by processing specified URLs through a rendering pipeline to produce visual output.
• Document Text Extractors - Extracts plain text from parsed web documents by retrieving all text nodes without styling.
• Application Key-Value Stores - Manages persistent and ephemeral key-value storage maps scoped by origin to maintain application state.
• Client-Side Data Persistence - Provides dedicated subsystems for persisting cookies, localStorage, and sessionStorage.
• SVG Rendering Engines - Processes and displays SVG documents to produce visual graphics.
• Headless Page Captures - Generates full-page PNG images of URLs using a headless rendering pipeline.
• Arena-Based Memory Management - Implements an arena-based memory management strategy for the DOM tree to optimize cache locality and allocation speed.
• Native API Bridges - Provides native API bridges to invoke platform methods and hardware capabilities directly from the scripting runtime.
• Macro-Based Bindings - Uses compile-time macros to map native system functions to the JavaScript runtime for low-level API access.
• Cookie Management - Manages cookies by isolating them into distinct zones to prevent unauthorized access across different browsing contexts.
• Browser Context Isolations - Implements a web content isolation model using separate storage zones and cookie containers to prevent data leakage.
• Pipeline - Reacts to asynchronous notifications from the render pipeline to trigger frame updates or application logic.
• Modular Engine Architectures - Implements a trait-based system to customize the combination of parser, DOM, and CSS modules.
• Module Configuration Interfaces - Allows customization of the engine by swapping parser, DOM, and CSS implementations through specific trait-based interface definitions.
• Tab Management - Controls browser tab navigation and session state through an event-driven interface.
• Tab Managers - Executes multiple concurrent navigation sessions, managing the lifecycle of several browser tabs simultaneously.
• Web Storage Implementations - Includes a web storage manager for persisting cookies, local storage, and session storage via JSON or SQLite.
• Headless Rendering Engines - Implements a rendering engine specifically configured for headless page rendering and script execution without a visible window.
• Session Profile Isolations - Provides utilities for managing distinct browser user profiles to isolate cookies and authentication sessions.
• WebAssembly Compilation - Transforms the entire browser engine into a WebAssembly binary for execution inside a web browser.

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