Desinda InterfaceAPI is a powerful, full-fledged UI library with a strong set of widgets, custom animations, transitions, theming, built-in IME support, RTL text rendering and bi-directional text, SVG icon support, common barcodes (Code128, EAN-13 and QR codes), PDF writer, and more.

The purpose of InterfaceAPI is to provide a UI library for data heavy applications in a data-oriented programming language. It is primarily offered in Odin.

• A large widget set containing more than 40 different widgets, including basic controls (buttons, combo boxes, sliders, menus), containers (panels, split panels, accordions, grid panels, flow panels, tab controls, etc.), data views (list view, tree view), complex widgets (node panel, timeline), text input (TextField, CodeField, FreeFormTextField), and dozens more.
• Video support with permissive licences for video and audio decoding (dav1d, OpenH264, libvorbis, etc.)
• AAC-LC decoder built-in
• Barcodes - Code128, EAN-13, QR
• Text rendering with Harfbuzz and loading with FreeType
• Syntax highlighting in CodeField with hard-coded example languages: GLSL, Haxe, Json, Lua, Markdown, Odin & XML
• Built-in IME support for Arabic, Chinese, Hebrew, Hindi, Japanese, Korean, Russian and Thai
• Standard and common set of SVG Icons
• Full PDF Writer support
• SVG Parser and Renderer
• Basic Email support
• Theming system
• Animations and animation sequences
• Styling transition and effects
• A full drawing primitive system with SDF rendering
• Custom Object design with a command-based drawing system
• Event handling via flag checks (is_clicked, was_pressed, etc.)
• HotKey system and application registry
• Form Generation for data synchronization and validation (JSON support built-in)
• And more...

package main

import interface "vendor:InterfaceAPI"

main :: proc() {
    launch_options := interface.create_default_launch_options("My Project", 1280, 720)

    app := interface.create_app(launch_options)

    // 1. InterfaceAPI initialisation code here

    interface.app_init_window(app)
	interface.app_init_framework(app)

    // 2. Resource initialisation code here

    // 3. build your object tree here

    for app.__running {
        interface.app_update(app)

        // 4. handle widget events here

        interface.app_render(app)
    }

    interface.app_destroy(app)
	interface.app_close_window(app)
	interface.dispose_app(app)
}

This library is tested against the April build of the Odin compiler.

Pre-requisites for building applications with this library can be found in the TUTORIAL.md guide.

The test/ directory contains source code for both a demo application showing off all the widgets that exist, plus an interactive tutorial and reference guide.

Copyright 2026 Desinda and contributors

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