This is a prototype codebase containing the necessary code for displaying and editing rich text in a manner suitable for integrating in game engines, and with unicode support comparable to that which is found in browsers or operating systems.

• ✓ LTR and RTL line break aware paragraph layout
• ✓ Bidirectional text support
• ✗ Vertical text layout
• ✓ Per-script font fallbacks
• ✓ Common font fallbacks
• ✓ Family fallbacks
• ✓ Inline font size and face switching
• ✓ icu4c-compatible text run parsing
• ✓ Full feature unicode support (Complex scripts, Emoji, Zalgo text, etc)
• ✓ Color glyph support
• ✓ Dynamic glyph atlas
• ✗ Scalable text rendering (SDF, Vector)
• ✓ Synthetic weight
• ✓ Synthetic italic
• ✓ Synthetic smallcaps
• ✓ Synthetic subscript/superscript

• ✓ OS text event and Input Method Editor support
• ✓ Clipboard integration and accelerators (Ctrl+X, Ctrl+C, Ctrl+V)
• ✓ Character break aware cursor navigation (mouse, arrow keys)
• ✓ Basic text selection (click and drag, shift+arrow keys)
• ✓ Word, line, and full text aware navigation (Ctrl+arrow keys, Ctrl+A, Home, End, Ctrl+Home, Ctrl+End, n-clicking text area)
• ✗ Undo, Redo (Ctrl+Z, Ctrl+Y)

• ✓ Color
• ✗ Transparency
• ✓ Font family
• ✓ Font size
• ✓ Font weight
• ✓ Bold
• ✓ Italic
• ✓ Underline
• ✓ Strikeout
• ✓ Stroke color
• ✓ Stroke transparency
• ✓ Stroke thickness
• ✓ Stroke join type
• ✓ Uppercase modifier
• ✗ Lowercase modifier
• ✗ Titlecase modifier
• ✓ Smallcaps modifier
• ✓ Subscript modifier
• ✓ Superscript modifier
• ✗ Line break <br />
• ✗ XML escape sequences e.g. <
• ✓ Comment
• ✗ SIMD-accelerated parsing

• FreeType
• GLAD
• GLFW
• HarfBuzz
• ICU
• icu-le-hb
• msdfgen
• simdjson

• Text Rendering Hates You
• Text Editing Hates You Too