# Text Renderer

## Current state

No text rendering exists yet. No font loading or glyph blitting code exists.

## Goal

Draw ASCII text into the RGB565 framebuffer using a bitmap font.

## Design notes

- A bitmap font is the right fit: each glyph is a small masked tile, blitted
  directly into the framebuffer using the existing blit primitive in `pixelhelper.rs`.
- Likely approach: a fixed 8×8 or similar glyph grid packed into a PNG,
  one glyph per ASCII codepoint starting at 0x20 (space).
- The font image only needs its alpha mask: glyph pixels are opaque, background transparent;
  the caller supplies the color and `draw_text` paints the mask with it.
- API sketch:
  ```rust
  fn draw_text(frame: &mut [u16], font: &Font, x: i32, y: i32, color: u16, text: &str);
  ```
- `Font` holds the glyph sheet as an `Image` plus glyph width/height.

## Open questions

- How do we handle proportional spacing of different characters?
- How do we store font data in memory?
- How do we handle font color rendering?
- How do we handle special characters like Ä, Ö, Ü, ß, etc.?