StandardViewer

StandardViewer is a cross-platform software library designed to render a broad range of document and media formats within host applications. It provides a consistent rendering pipeline, a modular architecture, and bindings for common UI stacks, allowing developers to embed viewing functionality without implementing format-specific logic themselves.

Key features include support for images (JPEG, PNG, GIF, WebP), vector graphics (SVG), and plain or structured text; accessible navigation and text extraction; zoom, pan, rotation; printing and exporting; and an extension mechanism to add format adapters and custom rendering backends. It emphasizes API stability and aims to minimize dependencies to facilitate integration across platforms.

The architecture centers on a core rendering engine, a set of adapters for each format, and a plugin interface for backends and annotations. It abstracts rendering from the host platform and can leverage hardware acceleration when available, where supported by the underlying platform.

Origin and development: The project originated as a lightweight viewer component intended for inclusion in desktop and mobile applications. It is maintained by an open-source community with a governance model based on a repository and contribution guidelines, encouraging collaboration and broad platform support.

Usage: Developers integrate the library into their app, initialize a viewer component, and feed it content via URIs, streams, or in-memory data. The library exposes events for load status, user interaction, and errors, enabling developers to respond to user actions and content changes.

Licensing and availability: StandardViewer is distributed under open-source licenses, with documentation and example applications provided to assist integration.