---
title: "WGSL to GLSL snippets: API"
package: "@phaser-ae/wgsl-glsl"
tier: Free
version: 3.0.0-1
released: 2026-10-19
updated: 2026-10-20
description: "Translates WGSL effect snippets to GLSL ES 3.0, so shaders written for WebGPU still draw on the WebGL2 fallback, and fails loudly on anything it cannot translate."
url: https://phaser.io/packs/wgsl-glsl/api
site: Phaser - https://phaser.io
---

# WGSL to GLSL snippets: API

`@phaser-ae/wgsl-glsl` — Translates WGSL effect snippets to GLSL ES 3.0 for the WebGL2 fallback, failing loudly on anything outside the snippet contract.

## The pack

### `wgslGlsl`

```ts
function wgslGlsl(): Pack<{ wgslGlsl: WgslGlslApi }>
```

The `wgsl-glsl` pack: the WGSL-to-GLSL snippet translator the WebGL2 fallback and the effect packs share.

## Helpers

### `wgslSnippetToGLSL`

```ts
function wgslSnippetToGLSL(code: string, scope: SnippetScope, helpers?: SnippetHelpers): string
```

Translate one WGSL snippet body to GLSL ES 3.0, against the names the
template declares. Throws an Error naming the unsupported construct — the
caller is expected to report it and skip the pass, never to splice a partial
result. `helpers` adds a template's own helper functions (a 3D template's
noise3, say) to the shared set.

## Types

### `ScopeType`

```ts
type ScopeType = string | { members: Record<string, string> }
```

The scope a snippet is translated against: name → GLSL type, or a struct.

### `SnippetHelpers`

```ts
type SnippetHelpers = Record<string, { args: string[]; ret: string }>
```

Helper functions a template declares beyond the shared set, by name: each argument's GLSL type and the return
type. A template that passes one must declare it, with that name and signature, in both dialects.

### `SnippetScope`

```ts
type SnippetScope = Record<string, ScopeType>
```

The full set of names a snippet can reference, each with its GLSL type.

### `WgslGlslApi`

```ts
interface WgslGlslApi
```

`game.wgslGlsl`: the snippet translator.

- `wgslSnippetToGLSL: typeof wgslSnippetToGLSL` — Translate a WGSL snippet body to GLSL ES 3.0 against the names its template declares. Throws, naming the construct, on anything outside the snippet contract.

---

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