@luma.gl/effects/dist/passes/postprocessing/image-adjust-filters/vibrance.js

Post-processing effects for luma.gl

// luma.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
const source = /* wgsl */ `\
struct vibranceUniforms {
  amount: f32
};

@group(0) @binding(1) var<uniform> vibrance: vibranceUniforms;

fn vibrance_filterColor(vec4f color) -> vec4f {
  let average: f32 = (color.r + color.g + color.b) / 3.0;
  let mx: f32 = max(color.r, max(color.g, color.b));
  let amt: f32 = (mx - average) * (-vibrance.amount * 3.0);
  color.rgb = mix(color.rgb, vec3(mx), amt);
  return color;
}

vec4 vibrance_filterColor_ext(vec4 color, vec2 texSize, vec2 texCoord) {
  return vibrance_filterColor(color);
}
`;
const fs = /* glsl */ `\
uniform vibranceUniforms {
  float amount;
} vibrance;

vec4 vibrance_filterColor(vec4 color) {
  float average = (color.r + color.g + color.b) / 3.0;
  float mx = max(color.r, max(color.g, color.b));
  float amt = (mx - average) * (-vibrance.amount * 3.0);
  color.rgb = mix(color.rgb, vec3(mx), amt);
  return color;
}

vec4 vibrance_filterColor_ext(vec4 color, vec2 texSize, vec2 texCoord) {
  return vibrance_filterColor(color);
}
`;
/** Vibrance - Modifies the saturation of desaturated colors, leaving saturated colors unmodified. */
export const vibrance = {
    props: {},
    uniforms: {},
    name: 'vibrance',
    uniformTypes: {
        amount: 'f32'
    },
    propTypes: {
        amount: { value: 0, min: -1, max: 1 }
    },
    source,
    fs,
    passes: [{ filter: true }]
};
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