## Endpoints

Being that this uses `http.ServerMux`, if you need to avoid caching you can add
to your endpoint path, and it will still reach its correct handler. You can see
the [docs](https://golang.org/pkg/net/http/#ServeMux) to learn more.

```
GET /
```

This is the main endpoint. You can pass it options as url query params, and it
will return a png image.

```
GET /web/
```

This endpoint will return an HTML file, with [OpenGraph](https://ogp.me) meta
tags, and a link to the generated image in `og:image`. It will take the same
options as `GET /`, plus some specific to the meta tags.

```
GET /tar/
GET /zip/
```

These endpoints will return an archive with 5 images:

- `favicon-16x16.png`
- `favicon-32x32.png`
- `apple-touch-icon.png`
- `android-chrome-192x192.png`
- `android-chrome-512x512.png`


The `apple-touch-icon.png` is 180x180, the other files the size is pretty evident.

These endpoints take the same query params as `GET /`, except that the `width`,
`height`, and `dpi` are set automatically.


## Options

Options can be passed as URL query params. The options are described here as:

```
name	type	default_value	limitations
```

All options are, optional. There should always be a fallback value.

```
width	int	100	max:4096
height	int	100	max:4096
```

Set the width and height of the image. If only `width` is passed, `height` will
be set to its value.

```
mask	string	"plain"
```

Set the mask for the image drawing. The different masks are:

- `plain`: just a plain, one color, background.
- `diagonal`: split diagonally, two colors.

TODO:

- `vertical`: split vertically, two colors.
- `horizontal`: split horizontally, two colors.

```
color	[]string	[]string{"#242933", "#eceff4"}
```

Set the colors to be used for the image. Hex strings can be in any of the
following formats: `rgb`, `rgba`, `rrggbb`, `rrggbbaa`. It is not
case-sensitive, hashes (`#`) at the start will be ignored, and `alpha` will be
set to `255` (ie `ff`) if not passed.  You can pass more than one color, and
they will be used as needed.

```
desc	string	""
```

_This option is only available on the `/web/` endpoint._

Set the `og:description` content.


## Text options

```
text	string	""
```

Set the text content to be rendered on the image. The text color will be the
last passed `color` param.

```
font	string	""
```

Set the font family for the text. There will be a default, set in the config.

```
size	float64		80.0	max:240.0
```

Set the font size for the text.

```
dpi		float64		72.0	max:720.0
```

Set the dpi for font rendering.


## Text options (WIP)

```
center	string	"height"
```

Text can be set centered in two ways: on the actual `height` of the text, which
can vary depending on the letter (ie, `l` is a lot taller than `_`), or on a
consistent (among other letters in its font) `baseline`.