@luma.gl/shadertools
Version:
Shader module system for luma.gl
22 lines • 1.1 kB
JavaScript
const fs = "uniform float hue;\nuniform float saturation;\n\nvec4 hueSaturation_filterColor(vec4 color) {\n float angle = hue * 3.14159265;\n float s = sin(angle), c = cos(angle);\n vec3 weights = (vec3(2.0 * c, -sqrt(3.0) * s - c, sqrt(3.0) * s - c) + 1.0) / 3.0;\n float len = length(color.rgb);\n color.rgb = vec3(\n dot(color.rgb, weights.xyz),\n dot(color.rgb, weights.zxy),\n dot(color.rgb, weights.yzx)\n );\n float average = (color.r + color.g + color.b) / 3.0;\n if (saturation > 0.0) {\n color.rgb += (average - color.rgb) * (1.0 - 1.0 / (1.001 - saturation));\n } else {\n color.rgb += (average - color.rgb) * (-saturation);\n }\n\n return color;\n}\n\nvec4 hueSaturation_filterColor(vec4 color, vec2 texSize, vec2 texCoord) {\n return hueSaturation_filterColor(color);\n}\n";
const uniforms = {
hue: {
value: 0,
min: -1,
max: 1
},
saturation: {
value: 0,
min: -1,
max: 1
}
};
export const hueSaturation = {
name: 'hueSaturation',
uniforms,
fs,
passes: [{
filter: true
}]
};
//# sourceMappingURL=huesaturation.js.map