kepler.gl/src/deckgl-layers/dist/raster/webgl/texture/mask.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.maskUint = exports.maskInt = exports.maskFloat = void 0;
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project

var inf = Math.pow(2, 62);
function getUniforms() {
  var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  var imageMask = opts.imageMask,
    maskKeepMin = opts.maskKeepMin,
    maskKeepMax = opts.maskKeepMax;
  if (!imageMask) {
    return null;
  }
  return {
    bitmapTextureMask: imageMask,
    keepMin: Number.isFinite(maskKeepMin) ? maskKeepMin : -inf,
    keepMax: Number.isFinite(maskKeepMax) ? maskKeepMax : inf
  };
}
var maskUniformTypes = {
  keepMin: 'f32',
  keepMax: 'f32'
};
function makeMaskModule(name, samplerType) {
  var blockDecl = "uniform ".concat(name, "Uniforms {\n  float keepMin;\n  float keepMax;\n} ").concat(name, ";\n");
  var fs1 = "uniform sampler2D bitmapTextureMask;\n".concat(blockDecl, "\n");
  var fs2 = "precision mediump float;\nprecision mediump int;\nprecision mediump usampler2D;\n\n#ifdef SAMPLER_TYPE\n  uniform SAMPLER_TYPE bitmapTextureMask;\n#else\n  uniform sampler2D bitmapTextureMask;\n#endif\n\n".concat(blockDecl, "\n");
  return {
    name: name,
    fs1: fs1,
    fs2: fs2,
    uniformTypes: maskUniformTypes,
    getUniforms: getUniforms,
    defines: {
      SAMPLER_TYPE: samplerType
    },
    inject: {
      'fs:DECKGL_CREATE_COLOR': "\n    float mask_value = float(texture(bitmapTextureMask, coord).r);\n    if (mask_value < ".concat(name, ".keepMin) discard;\n    if (mask_value > ").concat(name, ".keepMax) discard;\n    ")
    }
  };
}
var maskFloat = exports.maskFloat = makeMaskModule('mask_image_float', 'sampler2D');
var maskUint = exports.maskUint = makeMaskModule('mask_image_uint', 'usampler2D');
var maskInt = exports.maskInt = makeMaskModule('mask_image_int', 'isampler2D');
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