# glsl-blend-soft-light

> blend mode 'overlay' for GLSL

Latest version **1.0.5** (published 2015-01-26) · MIT license · 0 weekly downloads

## Install

```sh
npm install glsl-blend-soft-light
pnpm add glsl-blend-soft-light
yarn add glsl-blend-soft-light
bun add glsl-blend-soft-light
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.5 |
| Published | 2015-01-26 |
| First published | 2015-01-26 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 16 |
| Author | Matt DesLauriers |
| Maintainers | mattdesl |
| Keywords | ecosystem:stackgl, blend, blend mode, mode, glsl, glslify, stackgl |

## Links

- npm: https://www.npmjs.com/package/glsl-blend-soft-light
- Repository: https://github.com/mattdesl/glsl-blend-soft-light
- Issues: https://github.com/mattdesl/glsl-blend-soft-light/issues
- npm.io page: https://npm.io/package/glsl-blend-soft-light

## Recent versions

- 1.0.5 (latest) — 2015-01-26
- 1.0.4 — 2015-01-26
- 1.0.3 — 2015-01-26

## README

# glsl-blend-soft-light

[![stable](http://badges.github.io/stability-badges/dist/stable.svg)](http://github.com/badges/stability-badges)

[(click for demo)](http://mattdesl.github.io/glsl-blend-soft-light/)

Photoshop-like "soft light" blend mode for GLSL.

```glsl
#pragma glslify: blend = require(../)

void main() {
  vec4 bgColor = texture2D(bg, vUv);
  vec4 fgColor = texture2D(foreground, vUv);

  vec3 color = blend(bgColor.rgb, fgColor.rgb);
  gl_FragColor = vec4(color, 1.0);
}
```

## Usage

[![NPM](https://nodei.co/npm/glsl-blend-soft-light.png)](https://nodei.co/npm/glsl-blend-soft-light/)

#### `blend(vec3 base, vec3 blend)`

Blends background and foreground with an "soft light" blend mode. The algorithm for each channel is as follows:

```
(blend < 0.5) ? (2.0 * base * blend + base * base * (1.0 - 2.0 * blend)) : (sqrt(base) * (2.0 * blend - 1.0) + 2.0 * base * (1.0 - blend))
```

## Contributing

See [stackgl/contributing](https://github.com/stackgl/contributing).

## License

MIT. See [LICENSE.md](http://github.com/mattdesl/glsl-blend-soft-light/blob/master/LICENSE.md) for details.

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_Source: https://npm.io/package/glsl-blend-soft-light · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._