gfxArc

gfxArc is a lightweight, open‑source graphics library focused on the rendering of circular and elliptical arcs as well as related curve primitives. It was introduced in 2018 by the graphics development team at ArcSoftware Solutions and released under the permissive MIT license. The library is written in C++ and offers a straightforward API that can be integrated into existing rendering pipelines or used as a standalone component for 2D canvas applications.

At its core, gfxArc provides functions to generate points along an arc defined by a center, radius, start angle, and sweep angle. The primitives are then rendered using either rasterization techniques or by leveraging the host platform’s GPU via OpenGL or Vulkan. The library includes support for anti‑aliasing, stroke and fill styles, as well as transformations such as scaling, rotation, and translation. Users can combine multiple arc segments to create complex shapes like Bézier approximations or composite icons. Additionally, gfxArc offers utility functions for collision detection of points against arc boundaries, making it useful for interactive interfaces and simple physics simulations.

The design of gfxArc emphasizes performance and minimal overhead, making it suitable for embedded systems, web browsers via WebAssembly, and desktop applications alike. It is frequently cited as an alternative to heavier vector graphics engines such as Cairo or Skia when the use case focuses primarily on arc and circle rendering. The community maintains the codebase on GitHub, where contributors can submit pull requests, issue bug reports, and suggest enhancements.