5.2 Font Conversion Tool

A Python tool (d3tui-fontconv) will convert TTF/OTF fonts to .d3f format:

d3tui-fontconv input.ttf --size 16 --output font.d3f

6. Performance Optimization

6.1 Batch Rendering

• Group characters by texture atlas to minimize texture switches
• Use triangle strips for character quads when possible
• Submit all text in a single display list

6.2 Dirty Rectangle Optimization

• Track which screen regions have changed
• Only redraw changed regions
• Maintain a dirty rectangle list