FruitFont Editor

A visual editor for Adafruit GFX Fonts. Generates C code.

Reference

Source

• The GFXfont struct consists of:

  • uint8_t* bitmap, a pointer to the glyph data
  • GFXglyph* glyph, an array of glyph structs
  • uint16_t's first and last (ascii codes)
  • uint8_t yAdvance (line height)

• The GFXglyph struct consists of:

  • uint16_t bitmapOffset, a byte position within bitmapOffset
  • uint8_t's width, height and xAdvance (glyph width)
  • int8_t's xOffset and yOffset to position the glyph

For a certain width and height, width × height bits starting at byte bitmapOffset are used to paint the glyph. The bits represents pixels from the top left corner; left-to-right then top-to-bottom.

Todo

This list is in no particular order:

• Compress the bitmap by identifying overlap
• Support multiple variants of a font (sizes and styles)
• Refactor: Replace {x|y}{min|max} with canvas height/width
• Auto-generate canvas dimensions from ystep (line height)
• Show auto-generate and show top/left/bottom guides
• Manual xstep (glyph width) for monospace and proportional
• Import GFXfont .h files
• Preview widget
• Onionskin display
• Sharper glyph tray previews by snapping to integer scales
• Fill gaps while drawing quickly