embedded-graphics-profont 0.1.0

Bitmap font rendering for embedded-graphics with anchor and tracking support
Documentation

embedded-graphics-profont

Bitmap font rendering for embedded-graphics with text anchoring and tracking support.

Quick Start

use embedded_graphics::{
    pixelcolor::Rgb666,
    prelude::*,
};
use embedded_graphics_profont::{Text, Anchor, WithAnchor};

mod fonts;
use fonts::FONT;

// Render text
let text = Text::new("Hello", Point::new(0, 0), &FONT, Rgb666::BLACK);
display.draw(&text).ok();

// With anchoring and spacing
let text = Text::new("Centered", Point::new(160, 120), &FONT, Rgb666::BLACK)
    .with_anchor(Anchor::MiddleCenter)
    .with_tracking(2);
display.draw(&text).ok();

Features

  • no_std compatible
  • Bitmap fonts (monospace & proportional)
  • 9-point text anchoring (TopLeft, TopCenter, TopRight, MiddleLeft, MiddleCenter, MiddleRight, BottomLeft, BottomCenter, BottomRight)
  • Character tracking (letter spacing)
  • Transparent rendering (only font pixels drawn)
  • Text measurement via font.measure_str()

Font Generation

See TOOLS.md for complete font generation workflow.

Quick workflow:

  1. Create/edit font in GLCD Font Creator
  2. Export as .c (Format: MikroC, Method: "Export for tft")
  3. Convert with main.py → generates fonts.rs
  4. Copy to project

API Overview
Font::new(lookup_table, data, ascii_begin, ascii_end, max_height, proportional) Create font
font.measure_str(text, tracking) Get text width in pixels
text.with_anchor(anchor) Set anchor point
text.with_tracking(pixels) Set letter spacing
Character::new(ch, pos, font, color) Render single char

Modules

  • font - Font definition, Text, Character, Anchor
  • renderer - Low-level draw_char/draw_str functions

See cargo doc --open for full API reference.