ThorVG 1.0: Making SVG and Lottie Render Reliably Across Platforms

SVG and Lottie are common design and animation formats, but once they are used inside real applications, many details start to matter: whether graphics look consistent across platforms, whether complex animations slow down the UI, how assets are loaded and reused, and how APIs allow developers to modify elements inside the scene. ThorVG is an MIT-licensed open source C++ vector graphics engine for SVG, Lottie, and 2D rendering. Version 1.0 is an important milestone toward more mature real-world use.

This talk shares the engineering experience behind ThorVG 1.0 from the perspective of a core contributor. Through concrete examples, I will explain how SVG/Lottie parsing and compatibility issues affect the final image, how graphics data flows into rendering, how API design serves both application developers and contributors, and how performance, file size, stability, and maintenance cost are balanced. No graphics background is required. Attendees will see how an open source foundational library grows from “usable” to “reliable enough for real products".