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# shadower

_a simple command-line utility to add rounded corners and shadows to images_

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## Installation

### From AUR

`paru -S shadower-git`

### From source

`cargo build --release`

### From crates.io

`cargo install shadower`

## Usage

shadower by default reads the image from stdin and outputs it to stdout, so here are some non-config examples:

- `wl-paste | shadower | wl-copy`
- `shadower < image.png > image_shadow.png`
- `grimblast save active - | shadower | wl-copy`

However, you can also customize every aspect of the rounding, shadows, and padding of the images.
To do so, you can use **math expressions**, which let you dynamically calculate the values depending on the size of the input image.
For example, setting the `--offset-y` to `max / 6 / 4`, while running on a 800x600px image, will result in the shadow being offset down by 33.(3)px.  
You can also use the `clamp(min, val, max)` function to clamp a function to a given min and max, or if you only need a `min` or `max`, put `_` in the unnecessary value. (`clamp(_, 20, 10)` is `min(20, 10)`)

To view all the flags, use `--help`.

## Config file

You can also configure shadower using a config file instead of the flags. The default config location is `$XDG_CONFIG_HOME/shadower/config.toml`, but you can override it using the `--config` flag.
The config file can change every option (except the `--config`), and you just have to put the values in.
The keys have to use snake_case instead of kebab-case.

**Example config:**

```toml
radius="20"
padding_x="15 + max/2"
```

You can use environment variables, they will be expanded.

The default config values are always displayed in the `--help`.

###### Note: flags have priority over the config file

## Contributing

1. Make a fork
2. Make your changes
3. Commit the changes (please use [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/)!)
4. Create a PR

No need to ask me if you can implement something, if I think it's a good thing I'll merge it in.