@thi.ng/pixel/format/float-gray-range.js

Typedarray integer & float pixel buffers w/ customizable formats, blitting, drawing, convolution

import { fit, fitClamped } from "@thi.ng/math/fit";
import { mix } from "@thi.ng/math/mix";
import { Lane } from "../api.js";
import { __luminanceABGR } from "../internal/utils.js";
const FLOAT_GRAY_RANGE = (min, max) => {
  return {
    __float: true,
    alpha: false,
    gray: true,
    channels: [Lane.RED],
    shift: { 3: 0 },
    size: 1,
    range: [min, max],
    normalized: (val) => fitClamped(val, min, max, 0, 1),
    fromNormalized: (val) => mix(min, max, val),
    fromABGR: (src) => [mix(min, max, __luminanceABGR(src) / 255)],
    toABGR: (src) => (fit(src[0], min, max, 0, 255) | 0) * 65793 | 4278190080
  };
};
export {
  FLOAT_GRAY_RANGE
};