Uploaded September 2019 | Updated September 2026, 1 week ago
TL;DR:
RRE fonts are rendered using optimized set of rectangles instead of pixels like in typical bitmap approach.
Main advantages:
- very fast rendering even on slow MCUs
- usually such fonts save a lot of memory especially for large fonts (for example 97x104 Times font takes only about 18k of flash instead of 120k in typical bitmap style)
- RRE fonts can be easily scaled in both directions
- this library can be used also for rendering bitmaps (which in RRE format use much less memory)
- special vertical or horizontal lines mode supported for special applications
- the most efficient for large color LCDs
Requirements:
- any Arduino graphics library supporting "fillRect()" function
The source code and examples are available here:
github.com/cbm80amiga/RREFont
Tested with:
- own ST7920 gfx library
- SSD1306 OLED + Adafruit GFX Library
- own ST7789 SPI + Adafruit GFX Library
- own ILI9327, ST7781 TFT libs
TL;DR:
RRE fonts are rendered using optimized set of rectangles instead of pixels like in typical bitmap approach.
Main advantages:
- very fast rendering even on slow MCUs
- usually such fonts save a lot of memory especially for large fonts (for example 97x104 Times font takes only about 18k of flash instead of 120k in typical bitmap style)
- RRE fonts can be easily scaled in both directions
- this library can be used also for rendering bitmaps (which in RRE format use much less memory)
- special vertical or horizontal lines mode supported for special applications
- the most efficient for large color LCDs
Requirements:
- any Arduino graphics library supporting "fillRect()" function
The source code and examples are available here:
github.com/cbm80amiga/RREFont
Tested with:
- own ST7920 gfx library
- SSD1306 OLED + Adafruit GFX Library
- own ST7789 SPI + Adafruit GFX Library
- own ILI9327, ST7781 TFT libs
