kepler.gl/src/deckgl-layers/dist/raster/webgl/color/linear-rescale.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.linearRescale = void 0;
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project

var fs = "uniform linear_rescaleUniforms {\n  float scaler;\n  float offset;\n} linear_rescale;\n\n// Perform a linear rescaling of image\nvec4 linear_rescale_fn(vec4 arr, float scaler, float offset) {\n  return arr * scaler + offset;\n}\n";
function getUniforms() {
  var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  var linearRescaleScaler = opts.linearRescaleScaler,
    linearRescaleOffset = opts.linearRescaleOffset;
  if (!Number.isFinite(linearRescaleScaler) && !Number.isFinite(linearRescaleOffset)) {
    return null;
  }
  return {
    scaler: Number.isFinite(linearRescaleScaler) ? linearRescaleScaler : 1,
    offset: Number.isFinite(linearRescaleOffset) ? linearRescaleOffset : 0
  };
}
var linearRescale = exports.linearRescale = {
  name: 'linear_rescale',
  fs: fs,
  uniformTypes: {
    scaler: 'f32',
    offset: 'f32'
  },
  getUniforms: getUniforms,
  inject: {
    'fs:DECKGL_MUTATE_COLOR': "\n    image = linear_rescale_fn(image, linear_rescale.scaler, linear_rescale.offset);\n    "
  }
};
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