# Nasu

A minimal chr editor, written in ANSI C.

## Build

To build nasu, you must have [SDL2](https://wiki.libsdl.org/).

```
cc nasu.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -L/usr/local/lib -lSDL2 -o nasu
```

## I/O

To resume working on a tileset:

```
./nasu example.chr
```

Import a bmp:

```
./nasu example.bmp
```

## Controls

### IO

- `E` Export(nasu-export.chr)
- `R` Render(nasu-render.bmp)

### General

- `1-7` Patterns
- `ASDF` Colors0-3
- `H` Toggle Guides
- `Z` Decr. Brush Size
- `X` Incr. Brush Size
- `C` Cleanup Brush
- `N` Clear

### Paint

- `mouse1` Paint
- `mouse1+mouse2` Erase