RmlUi 3.0 is the biggest change yet, featuring a substantial amount of new features and bug fixes. One of the main efforts in RmlUi 3.0 has been on improving the performance of the library. Users should see a noticable performance increase when upgrading.

Notable new features

• Major performance improvements, up to 25x performance increase in some situations.
• New and improved decorators.
• Sprite sheet support.
• Replaced manual reference counting with smart pointers.
• Improved transforms API and implementation.
• Improved debugger
• Major overhaul of the font engine.
  • Fully replacable by users.
  • All strings should now be considered as encoded in UTF-8, the old UCS-2 strings are gone.
  • Unicode characters are loaded on demand, no longer a need to define a character set.
  • Emoji support (monochrome glyphs).

Read the full changelog here.

Note that this release contains breaking changes. C++14-compatible compiler required. Windows binaries built using Visual Studio 15 2017.