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glsl-blend-soft-light's Introduction

glsl-blend-soft-light

stable

(click for demo)

Photoshop-like "soft light" blend mode for 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

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.

License

MIT. See LICENSE.md for details.

glsl-blend-soft-light's People

Contributors

mattdesl avatar

Stargazers

Ben Resnick avatar Wenbo Wang avatar akamos777 avatar Vis avatar Dmitry Ulmer-Morozov avatar Eric Jinks avatar Tom Pickering avatar Jeff Hutchinson avatar Dilpreet avatar  avatar Michael Anthony avatar Brett Camper avatar Yosh avatar

Watchers

James Cloos avatar  avatar Michael Anthony avatar Vis avatar  avatar

glsl-blend-soft-light's Issues

wrong condition!!!

vec3 blendSoftLight(vec3 base, vec3 blend) {
return mix(
sqrt(base) * (2.0 * blend - 1.0) + 2.0 * base * (1.0 - blend),
2.0 * base * blend + base * base * (1.0 - 2.0 * blend),
step(blend, vec3(0.5))
);
}

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