# `Image.Plug.Pipeline.Ops.Format`
[🔗](https://github.com/elixir-image/image_plug/blob/v0.1.0/lib/image/plug/pipeline/ops/format.ex#L1)

Output format / encoder configuration. Lives on the pipeline rather
than in the op list — there is exactly one per pipeline.

`:type` is the requested output format; `:auto` defers to content
negotiation (Accept header) at encode time. The encoder may
substitute a fallback format and add a header noting the substitution
(currently only `:avif -> :webp` when libvips lacks AVIF support).

# `chroma_subsampling`

```elixir
@type chroma_subsampling() :: nil | :auto | :on | :off
```

# `compression`

```elixir
@type compression() :: nil | :fast
```

# `metadata`

```elixir
@type metadata() :: :copyright | :keep | :none
```

# `t`

```elixir
@type t() :: %Image.Plug.Pipeline.Ops.Format{
  anim?: boolean(),
  chroma_subsampling: chroma_subsampling(),
  compression: compression(),
  dpr: pos_integer(),
  lossy: nil | boolean(),
  metadata: metadata(),
  progressive: nil | boolean(),
  quality: 1..100,
  scq_quality: nil | 1..100,
  type: type()
}
```

# `type`

```elixir
@type type() ::
  :auto
  | :avif
  | :webp
  | :jpeg
  | :baseline_jpeg
  | :png
  | :gif
  | :tiff
  | :jp2
  | :pdf
  | :json
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*