# esbuild-plugin-glsl

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An [esbuild plugin](https://esbuild.github.io/plugins/) that adds support for `.frag`, `.vert`, `.glsl` and `.wgsl` [file imports](https://esbuild.github.io/content-types/#text) with optional shader minification.

## Installation

```sh
npm install esbuild-plugin-glsl
```

## Usage

```js
import esbuild from "esbuild";
import { glsl } from "esbuild-plugin-glsl";

await esbuild.build({
	entryPoints: ["input.js"],
	outfile: "output.js",
	bundle: true,
	plugins: [glsl({
		minify: true
	})]
});
```

### Options

| Option                | Description                                                                                  | Default                                                                 |
|-----------------------|----------------------------------------------------------------------------------------------|-------------------------------------------------------------------------|
| minify                | Enables or disables basic shader minification.                                               | follows [minify](https://esbuild.github.io/api/#minify)                 |
| resolveIncludes       | When enabled, shaders can include other shaders with the custom `#include "path"` directive. | `true`                                                                  |
| preserveLegalComments | Preserves comments that start with `//!` or `/*!` or include `@license` or `@preserve`.      | follows [legal-comments](https://esbuild.github.io/api/#legal-comments) |

### TypeScript

To tell the TypeScript compiler how to handle shader sources, add a `shaders.d.ts` [ambient declaration file](https://basarat.gitbook.io/typescript/type-system/intro/d.ts) to your project:

```ts
declare module "*.wgsl" {
	const value: string;
	export default value;
}

declare module "*.glsl" {
	const value: string;
	export default value;
}

declare module "*.frag" {
	const value: string;
	export default value;
}

declare module "*.vert" {
	const value: string;
	export default value;
}
```

## Contributing

Use the issue tracker to propose and discuss changes. Maintain the existing coding style. Lint and test your code.