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kepler.gl

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

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"use strict"; var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault"); Object.defineProperty(exports, "__esModule", { value: true }); exports.COLORMAP_TEXTURE_PARAMETERS = void 0; exports.generateCategoricalColormapTexture = generateCategoricalColormapTexture; exports.getCombineBandsModule = getCombineBandsModule; exports.getImageMaskModule = getImageMaskModule; exports.getModules = getModules; exports.loadImage = loadImage; exports.loadNpyArray = loadNpyArray; var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator")); var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray")); var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator")); var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty")); var _core = require("@loaders.gl/core"); var _images = require("@loaders.gl/images"); var _textures = require("@loaders.gl/textures"); var _constants = _interopRequireDefault(require("@luma.gl/constants")); var _constants2 = require("@kepler.gl/constants"); var _deckglLayers = require("@kepler.gl/deckgl-layers"); var _rasterTileUtils = require("./raster-tile-utils"); function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; } function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2["default"])(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; } // SPDX-License-Identifier: MIT // Copyright contributors to the kepler.gl project /** * Functions and constants for handling webgl/luma.gl/deck.gl entities */ var combineBandsFloat = _deckglLayers.RasterWebGL.combineBandsFloat, combineBandsInt = _deckglLayers.RasterWebGL.combineBandsInt, combineBandsUint = _deckglLayers.RasterWebGL.combineBandsUint, maskFloat = _deckglLayers.RasterWebGL.maskFloat, maskInt = _deckglLayers.RasterWebGL.maskInt, maskUint = _deckglLayers.RasterWebGL.maskUint, linearRescale = _deckglLayers.RasterWebGL.linearRescale, gammaContrast = _deckglLayers.RasterWebGL.gammaContrast, sigmoidalContrast = _deckglLayers.RasterWebGL.sigmoidalContrast, normalizedDifference = _deckglLayers.RasterWebGL.normalizedDifference, enhancedVegetationIndex = _deckglLayers.RasterWebGL.enhancedVegetationIndex, soilAdjustedVegetationIndex = _deckglLayers.RasterWebGL.soilAdjustedVegetationIndex, modifiedSoilAdjustedVegetationIndex = _deckglLayers.RasterWebGL.modifiedSoilAdjustedVegetationIndex, colormapModule = _deckglLayers.RasterWebGL.colormap, filter = _deckglLayers.RasterWebGL.filter, saturation = _deckglLayers.RasterWebGL.saturation, reorderBands = _deckglLayers.RasterWebGL.reorderBands, rgbaImage = _deckglLayers.RasterWebGL.rgbaImage; /** * Describe WebGL2 Texture parameters to use for given input data type */ /** * Convert TypedArray to WebGL2 Texture Parameters */ function getWebGL2TextureParameters(data) { if (data instanceof Uint8Array || data instanceof Uint8ClampedArray) { return { // Note: texture data has no auto-rescaling; pixel values stay as 0-255 format: _constants["default"].R8UI, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].UNSIGNED_BYTE }; } if (data instanceof Uint16Array) { return { format: _constants["default"].R16UI, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].UNSIGNED_SHORT }; } if (data instanceof Uint32Array) { return { format: _constants["default"].R32UI, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].UNSIGNED_INT }; } if (data instanceof Int8Array) { return { format: _constants["default"].R8I, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].BYTE }; } if (data instanceof Int16Array) { return { format: _constants["default"].R16I, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].SHORT }; } if (data instanceof Int32Array) { return { format: _constants["default"].R32I, dataFormat: _constants["default"].RED_INTEGER, type: _constants["default"].INT }; } if (data instanceof Float32Array) { return { format: _constants["default"].R32F, dataFormat: _constants["default"].RED, type: _constants["default"].FLOAT }; } if (data instanceof Float64Array) { return { format: _constants["default"].R32F, dataFormat: _constants["default"].RED, type: _constants["default"].FLOAT }; } // For exhaustive check above; following should never occur // https://stackoverflow.com/a/58009992 var unexpectedInput = data; throw new Error(unexpectedInput); } /** * Discrete-valued colormaps (e.g. from the output of * classification algorithms) in the raster layer. Previously, the values passed to * `TEXTURE_MIN_FILTER` and `TEXTURE_MAG_FILTER` were `GL.LINEAR`, which meant that the GPU would * linearly interpolate values between two neighboring colormap pixel values. Setting these values * to NEAREST means that the GPU will choose the nearest value on the texture2D lookup operation, * which fixes precision issues for discrete-valued colormaps. This should be ok for continuous * colormaps as long as the color difference between each pixel on the colormap is small. */ var COLORMAP_TEXTURE_PARAMETERS = exports.COLORMAP_TEXTURE_PARAMETERS = (0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])({}, _constants["default"].TEXTURE_MIN_FILTER, _constants["default"].NEAREST), _constants["default"].TEXTURE_MAG_FILTER, _constants["default"].NEAREST), _constants["default"].TEXTURE_WRAP_S, _constants["default"].CLAMP_TO_EDGE), _constants["default"].TEXTURE_WRAP_T, _constants["default"].CLAMP_TO_EDGE); var DEFAULT_8BIT_TEXTURE_PARAMETERS = (0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])({}, _constants["default"].TEXTURE_MIN_FILTER, _constants["default"].LINEAR_MIPMAP_LINEAR), _constants["default"].TEXTURE_MAG_FILTER, _constants["default"].LINEAR), _constants["default"].TEXTURE_WRAP_S, _constants["default"].CLAMP_TO_EDGE), _constants["default"].TEXTURE_WRAP_T, _constants["default"].CLAMP_TO_EDGE); var DEFAULT_HIGH_BIT_TEXTURE_PARAMETERS = (0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])((0, _defineProperty2["default"])({}, _constants["default"].TEXTURE_MIN_FILTER, _constants["default"].NEAREST), _constants["default"].TEXTURE_MAG_FILTER, _constants["default"].NEAREST), _constants["default"].TEXTURE_WRAP_S, _constants["default"].CLAMP_TO_EDGE), _constants["default"].TEXTURE_WRAP_T, _constants["default"].CLAMP_TO_EDGE); /** * Select correct module type for "combineBands" * * combineBands joins up to four 2D arrays (contained in imageBands) into a single "rgba" image * texture on the GPU. That shader code needs to have the same data type as the actual image data. * E.g. for float data the texture needs to be `sampler2D`, for uint data the texture needs to be * `usampler2D` and for int data the texture needs to be `isampler2D`. */ function getCombineBandsModule(imageBands) { // Each image array is expected/required to be of the same data type switch (imageBands[0].format) { case _constants["default"].R8UI: return combineBandsUint; case _constants["default"].R16UI: return combineBandsUint; case _constants["default"].R32UI: return combineBandsUint; case _constants["default"].R8I: return combineBandsInt; case _constants["default"].R16I: return combineBandsInt; case _constants["default"].R32I: return combineBandsInt; case _constants["default"].R32F: return combineBandsFloat; default: throw new Error('bad format'); } } /** Select correct image masking shader module for mask data type * The imageMask could (at least in the future, theoretically) be of a different data format than * the imageBands data itself. */ function getImageMaskModule(imageMask) { switch (imageMask.format) { case _constants["default"].R8UI: return maskUint; case _constants["default"].R16UI: return maskUint; case _constants["default"].R32UI: return maskUint; case _constants["default"].R8I: return maskInt; case _constants["default"].R16I: return maskInt; case _constants["default"].R32I: return maskInt; case _constants["default"].R32F: return maskFloat; default: throw new Error('bad format'); } } /** * Load image and wrap with default WebGL texture parameters * * @param url URL to load image * @param textureParams parameters to pass to Texture2D * * @return image object to pass to Texture2D constructor */ function loadImage(_x) { return _loadImage.apply(this, arguments); } function _loadImage() { _loadImage = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee(url) { var textureParams, requestOptions, response, image, _args = arguments; return _regenerator["default"].wrap(function _callee$(_context) { while (1) switch (_context.prev = _context.next) { case 0: textureParams = _args.length > 1 && _args[1] !== undefined ? _args[1] : {}; requestOptions = _args.length > 2 && _args[2] !== undefined ? _args[2] : {}; _context.next = 4; return (0, _core.fetchFile)(url, requestOptions); case 4: response = _context.sent; _context.next = 7; return (0, _core.parse)(response, _images.ImageLoader); case 7: image = _context.sent; return _context.abrupt("return", _objectSpread({ data: image, parameters: DEFAULT_8BIT_TEXTURE_PARAMETERS, format: _constants["default"].RGB }, textureParams)); case 9: case "end": return _context.stop(); } }, _callee); })); return _loadImage.apply(this, arguments); } /** * Load NPY Array * * The NPY format is described here: https://numpy.org/doc/stable/reference/generated/numpy.lib.format.html. * It's designed to be a very simple file format to hold an N-dimensional block of data. The header describes the data type, shape, and order (either C or Fortran) of the array. * * @param url URL to load NPY Array * @param split Whether to split single typed array representing an N-dimensional array into an Array with each dimension as its own typed array * * @return image object to pass to Texture2D constructor */ function loadNpyArray(_x2, _x3, _x4) { return _loadNpyArray.apply(this, arguments); } /** * Create texture data for categorical colormap scale * @param categoricalOptions - color map configuration and min-max values of categorical band * @returns texture data */ function _loadNpyArray() { _loadNpyArray = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee2(request, split, options) { var _request$options$sign, _getLoaderOptions, npyOptions, response, data, header, shape, _getWebGL2TexturePara, format, dataFormat, type, _shape, z, height, width, mipmaps, parameters, channels, channelSize, i; return _regenerator["default"].wrap(function _callee2$(_context2) { while (1) switch (_context2.prev = _context2.next) { case 0: _context2.prev = 0; _getLoaderOptions = (0, _constants2.getLoaderOptions)(), npyOptions = _getLoaderOptions.npy; _context2.next = 4; return (0, _core.load)(request.url, _textures.NPYLoader, { npy: npyOptions, fetch: options === null || options === void 0 ? void 0 : options.fetch }); case 4: response = _context2.sent; if (!(!response || !response.data || (_request$options$sign = request.options.signal) !== null && _request$options$sign !== void 0 && _request$options$sign.aborted)) { _context2.next = 7; break; } return _context2.abrupt("return", null); case 7: // Float64 data needs to be coerced to Float32 for the GPU if (response.data instanceof Float64Array) { response.data = Float32Array.from(response.data); } data = response.data, header = response.header; shape = header.shape; _getWebGL2TexturePara = getWebGL2TextureParameters(data), format = _getWebGL2TexturePara.format, dataFormat = _getWebGL2TexturePara.dataFormat, type = _getWebGL2TexturePara.type; // TODO: check height-width or width-height // Regardless, images usually square // TODO: handle cases of 256x256x1 instead of 1x256x256 _shape = (0, _slicedToArray2["default"])(shape, 3), z = _shape[0], height = _shape[1], width = _shape[2]; // Since we now use WebGL2 data types for 8-bit textures, we set the following for all textures mipmaps = false; parameters = DEFAULT_HIGH_BIT_TEXTURE_PARAMETERS; if (split) { _context2.next = 16; break; } return _context2.abrupt("return", { data: data, width: width, height: height, format: format, dataFormat: dataFormat, type: type, parameters: parameters, mipmaps: mipmaps }); case 16: // Split into individual arrays channels = []; channelSize = height * width; for (i = 0; i < z; i++) { channels.push({ data: data.subarray(i * channelSize, (i + 1) * channelSize), width: width, height: height, format: format, dataFormat: dataFormat, type: type, parameters: parameters, mipmaps: mipmaps }); } return _context2.abrupt("return", channels); case 22: _context2.prev = 22; _context2.t0 = _context2["catch"](0); return _context2.abrupt("return", null); case 25: case "end": return _context2.stop(); } }, _callee2, null, [[0, 22]]); })); return _loadNpyArray.apply(this, arguments); } function generateCategoricalColormapTexture(categoricalOptions) { var data = (0, _rasterTileUtils.generateCategoricalBitmapArray)(categoricalOptions); return { data: data, width: _rasterTileUtils.CATEGORICAL_TEXTURE_WIDTH, height: 1, format: _constants["default"].RGBA, dataFormat: _constants["default"].RGBA, type: _constants["default"].UNSIGNED_BYTE, parameters: COLORMAP_TEXTURE_PARAMETERS, mipmaps: false }; } // TODO: would probably be simpler to only pass in the props actually used by this function. That // would mean a smaller object than RenderSubLayersProps // eslint-disable-next-line max-statements, complexity function getModules(_ref) { var images = _ref.images, props = _ref.props; var moduleProps = {}; // Array of luma.gl WebGL modules to pass to the RasterLayer var modules = []; // use rgba image directly. Used for raster .pmtiles rendering if (images.imageRgba) { modules.push(rgbaImage); // no support for other modules atm for direct rgba mode return { modules: modules, moduleProps: moduleProps }; } if (!props) { return { modules: modules, moduleProps: moduleProps }; } var renderBandIndexes = props.renderBandIndexes, nonLinearRescaling = props.nonLinearRescaling, linearRescalingFactor = props.linearRescalingFactor, minPixelValue = props.minPixelValue, maxPixelValue = props.maxPixelValue, gammaContrastFactor = props.gammaContrastFactor, sigmoidalContrastFactor = props.sigmoidalContrastFactor, sigmoidalBiasFactor = props.sigmoidalBiasFactor, saturationValue = props.saturationValue, bandCombination = props.bandCombination, filterEnabled = props.filterEnabled, filterRange = props.filterRange, dataType = props.dataType, minCategoricalBandValue = props.minCategoricalBandValue, maxCategoricalBandValue = props.maxCategoricalBandValue, hasCategoricalColorMap = props.hasCategoricalColorMap; if (Array.isArray(images.imageBands) && images.imageBands.length > 0) { modules.push(getCombineBandsModule(images.imageBands)); } if (images.imageMask) { modules.push(getImageMaskModule(images.imageMask)); // In general, data masks are 0 for nodata and the maximum value for valid data, e.g. 255 or // 65535 for uint8 or uint16 data, respectively moduleProps.maskKeepMin = 1; } if (Array.isArray(renderBandIndexes)) { modules.push(reorderBands); moduleProps.ordering = renderBandIndexes; } var globalRange = maxPixelValue - minPixelValue; // Fix rescaling if we are sure that dataset is categorical if (hasCategoricalColorMap) { modules.push(linearRescale); moduleProps.linearRescaleScaler = 1 / maxPixelValue; moduleProps.linearRescaleOffset = 0; } else if ((0, _rasterTileUtils.isRescalingAllowed)(bandCombination)) { if (!nonLinearRescaling) { var _linearRescalingFacto = (0, _slicedToArray2["default"])(linearRescalingFactor, 2), min = _linearRescalingFacto[0], max = _linearRescalingFacto[1]; var localRange = max - min; // Add linear rescaling module modules.push(linearRescale); // Divide by local range * global range moduleProps.linearRescaleScaler = 1 / (localRange * globalRange); // Subtract off the local min moduleProps.linearRescaleOffset = -min; // Clamp to [0, 1] done automatically? } else { modules.push(linearRescale); moduleProps.linearRescaleScaler = 1 / maxPixelValue; moduleProps.linearRescaleOffset = 0; modules.push(gammaContrast); moduleProps.gammaContrastValue = gammaContrastFactor; modules.push(sigmoidalContrast); moduleProps.sigmoidalContrast = sigmoidalContrastFactor; moduleProps.sigmoidalBias = sigmoidalBiasFactor; } if (Number.isFinite(saturationValue) && saturationValue !== 1) { modules.push(saturation); moduleProps.saturationValue = saturationValue; } } switch (bandCombination) { case 'normalizedDifference': modules.push(normalizedDifference); break; case 'enhancedVegetationIndex': modules.push(enhancedVegetationIndex); break; case 'soilAdjustedVegetationIndex': modules.push(soilAdjustedVegetationIndex); break; case 'modifiedSoilAdjustedVegetationIndex': modules.push(modifiedSoilAdjustedVegetationIndex); break; default: break; } if ((0, _rasterTileUtils.isFilterAllowed)(bandCombination) && filterEnabled) { modules.push(filter); moduleProps.filterMin1 = filterRange[0]; moduleProps.filterMax1 = filterRange[1]; } // Apply colormap if ((0, _rasterTileUtils.isColormapAllowed)(bandCombination) && images.imageColormap) { modules.push(colormapModule); moduleProps.minCategoricalBandValue = minCategoricalBandValue; moduleProps.maxCategoricalBandValue = maxCategoricalBandValue; moduleProps.dataTypeMaxValue = _rasterTileUtils.dtypeMaxValue[dataType]; moduleProps.maxPixelValue = maxPixelValue; } return { modules: modules, moduleProps: moduleProps }; } //# 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SPDX-License-Identifier: MIT\n// Copyright contributors to the kepler.gl project\n\n/**\n * Functions and constants for handling webgl/luma.gl/deck.gl entities\n */\n\nimport {parse, fetchFile, load} from '@loaders.gl/core';\nimport {ImageLoader} from '@loaders.gl/images';\nimport {NPYLoader} from '@loaders.gl/textures';\nimport GL from '@luma.gl/constants';\nimport {Texture2DProps} from '@luma.gl/webgl';\n\nimport {getLoaderOptions} from '@kepler.gl/constants';\nimport {RasterWebGL} from '@kepler.gl/deckgl-layers';\n\ntype ShaderModule = RasterWebGL.ShaderModule;\nconst {\n  combineBandsFloat,\n  combineBandsInt,\n  combineBandsUint,\n  maskFloat,\n  maskInt,\n  maskUint,\n  linearRescale,\n  gammaContrast,\n  sigmoidalContrast,\n  normalizedDifference,\n  enhancedVegetationIndex,\n  soilAdjustedVegetationIndex,\n  modifiedSoilAdjustedVegetationIndex,\n  colormap: colormapModule,\n  filter,\n  saturation,\n  reorderBands,\n  rgbaImage\n} = RasterWebGL;\n\nimport {\n  CATEGORICAL_TEXTURE_WIDTH,\n  dtypeMaxValue,\n  generateCategoricalBitmapArray,\n  isColormapAllowed,\n  isFilterAllowed,\n  isRescalingAllowed\n} from './raster-tile-utils';\nimport {\n  CategoricalColormapOptions,\n  ImageData,\n  NPYLoaderDataTypes,\n  NPYLoaderResponse,\n  RenderSubLayersProps\n} from './types';\n\n/**\n * Describe WebGL2 Texture parameters to use for given input data type\n */\ninterface WebGLTextureFormat {\n  format: number;\n  dataFormat: number;\n  type: number;\n}\n\n/**\n * Convert TypedArray to WebGL2 Texture Parameters\n */\nfunction getWebGL2TextureParameters(data: NPYLoaderDataTypes): WebGLTextureFormat | never {\n  if (data instanceof Uint8Array || data instanceof Uint8ClampedArray) {\n    return {\n      // Note: texture data has no auto-rescaling; pixel values stay as 0-255\n      format: GL.R8UI,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.UNSIGNED_BYTE\n    };\n  }\n\n  if (data instanceof Uint16Array) {\n    return {\n      format: GL.R16UI,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.UNSIGNED_SHORT\n    };\n  }\n\n  if (data instanceof Uint32Array) {\n    return {\n      format: GL.R32UI,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.UNSIGNED_INT\n    };\n  }\n\n  if (data instanceof Int8Array) {\n    return {\n      format: GL.R8I,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.BYTE\n    };\n  }\n\n  if (data instanceof Int16Array) {\n    return {\n      format: GL.R16I,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.SHORT\n    };\n  }\n  if (data instanceof Int32Array) {\n    return {\n      format: GL.R32I,\n      dataFormat: GL.RED_INTEGER,\n      type: GL.INT\n    };\n  }\n  if (data instanceof Float32Array) {\n    return {\n      format: GL.R32F,\n      dataFormat: GL.RED,\n      type: GL.FLOAT\n    };\n  }\n\n  if (data instanceof Float64Array) {\n    return {\n      format: GL.R32F,\n      dataFormat: GL.RED,\n      type: GL.FLOAT\n    };\n  }\n\n  // For exhaustive check above; following should never occur\n  // https://stackoverflow.com/a/58009992\n  const unexpectedInput: never = data;\n  throw new Error(unexpectedInput);\n}\n\n/**\n * Discrete-valued colormaps (e.g. from the output of\n * classification algorithms) in the raster layer. Previously, the values passed to\n * `TEXTURE_MIN_FILTER` and `TEXTURE_MAG_FILTER` were `GL.LINEAR`, which meant that the GPU would\n * linearly interpolate values between two neighboring colormap pixel values. Setting these values\n * to NEAREST means that the GPU will choose the nearest value on the texture2D lookup operation,\n * which fixes precision issues for discrete-valued colormaps. This should be ok for continuous\n * colormaps as long as the color difference between each pixel on the colormap is small.\n */\nexport const COLORMAP_TEXTURE_PARAMETERS = {\n  [GL.TEXTURE_MIN_FILTER]: GL.NEAREST,\n  [GL.TEXTURE_MAG_FILTER]: GL.NEAREST,\n  [GL.TEXTURE_WRAP_S]: GL.CLAMP_TO_EDGE,\n  [GL.TEXTURE_WRAP_T]: GL.CLAMP_TO_EDGE\n};\n\nconst DEFAULT_8BIT_TEXTURE_PARAMETERS = {\n  [GL.TEXTURE_MIN_FILTER]: GL.LINEAR_MIPMAP_LINEAR,\n  [GL.TEXTURE_MAG_FILTER]: GL.LINEAR,\n  [GL.TEXTURE_WRAP_S]: GL.CLAMP_TO_EDGE,\n  [GL.TEXTURE_WRAP_T]: GL.CLAMP_TO_EDGE\n};\n\nconst DEFAULT_HIGH_BIT_TEXTURE_PARAMETERS = {\n  [GL.TEXTURE_MIN_FILTER]: GL.NEAREST,\n  [GL.TEXTURE_MAG_FILTER]: GL.NEAREST,\n  [GL.TEXTURE_WRAP_S]: GL.CLAMP_TO_EDGE,\n  [GL.TEXTURE_WRAP_T]: GL.CLAMP_TO_EDGE\n};\n\n/**\n * Select correct module type for \"combineBands\"\n *\n * combineBands joins up to four 2D arrays (contained in imageBands) into a single \"rgba\" image\n * texture on the GPU. That shader code needs to have the same data type as the actual image data.\n * E.g. for float data the texture needs to be `sampler2D`, for uint data the texture needs to be\n * `usampler2D` and for int data the texture needs to be `isampler2D`.\n */\nexport function getCombineBandsModule(imageBands: Texture2DProps[]): ShaderModule {\n  // Each image array is expected/required to be of the same data type\n  switch (imageBands[0].format) {\n    case GL.R8UI:\n      return combineBandsUint;\n    case GL.R16UI:\n      return combineBandsUint;\n    case GL.R32UI:\n      return combineBandsUint;\n    case GL.R8I:\n      return combineBandsInt;\n    case GL.R16I:\n      return combineBandsInt;\n    case GL.R32I:\n      return combineBandsInt;\n    case GL.R32F:\n      return combineBandsFloat;\n    default:\n      throw new Error('bad format');\n  }\n}\n\n/** Select correct image masking shader module for mask data type\n * The imageMask could (at least in the future, theoretically) be of a different data format than\n * the imageBands data itself.\n */\nexport function getImageMaskModule(imageMask: Texture2DProps): ShaderModule {\n  switch (imageMask.format) {\n    case GL.R8UI:\n      return maskUint;\n    case GL.R16UI:\n      return maskUint;\n    case GL.R32UI:\n      return maskUint;\n    case GL.R8I:\n      return maskInt;\n    case GL.R16I:\n      return maskInt;\n    case GL.R32I:\n      return maskInt;\n    case GL.R32F:\n      return maskFloat;\n    default:\n      throw new Error('bad format');\n  }\n}\n\n/**\n * Load image and wrap with default WebGL texture parameters\n *\n * @param url URL to load image\n * @param textureParams parameters to pass to Texture2D\n *\n * @return image object to pass to Texture2D constructor\n */\nexport async function loadImage(\n  url: string,\n  textureParams: Texture2DProps = {},\n  requestOptions: RequestInit = {}\n): Promise<Texture2DProps> {\n  const response = await fetchFile(url, requestOptions);\n  const image = await parse(response, ImageLoader);\n\n  return {\n    data: image,\n    parameters: DEFAULT_8BIT_TEXTURE_PARAMETERS,\n    format: GL.RGB,\n    ...textureParams\n  };\n}\n\ntype FetchLike = (url: string, options?: RequestInit) => Promise<Response>;\ntype LoadingOptions = {\n  fetch?: typeof fetch | FetchLike;\n};\n\n/**\n * Load NPY Array\n *\n * The NPY format is described here: https://numpy.org/doc/stable/reference/generated/numpy.lib.format.html.\n * It's designed to be a very simple file format to hold an N-dimensional block of data. The header describes the data type, shape, and order (either C or Fortran) of the array.\n *\n * @param url URL to load NPY Array\n * @param split Whether to split single typed array representing an N-dimensional array into an Array with each dimension as its own typed array\n *\n * @return image object to pass to Texture2D constructor\n */\nexport async function loadNpyArray(\n  request: {url: string; options: RequestInit},\n  split: true,\n  options?: LoadingOptions\n): Promise<Texture2DProps[] | null>;\nexport async function loadNpyArray(\n  request: {url: string; options: RequestInit},\n  split: false,\n  options?: LoadingOptions\n): Promise<Texture2DProps | null>;\nexport async function loadNpyArray(\n  request: {url: string; options: RequestInit},\n  split: boolean,\n  options?: LoadingOptions\n): Promise<Texture2DProps | Texture2DProps[] | null> {\n  try {\n    const {npy: npyOptions} = getLoaderOptions();\n    const response: NPYLoaderResponse = await load(request.url, NPYLoader, {\n      npy: npyOptions,\n      fetch: options?.fetch\n    });\n\n    if (!response || !response.data || request.options.signal?.aborted) {\n      return null;\n    }\n\n    // Float64 data needs to be coerced to Float32 for the GPU\n    if (response.data instanceof Float64Array) {\n      response.data = Float32Array.from(response.data);\n    }\n\n    const {data, header} = response;\n    const {shape} = header;\n    const {format, dataFormat, type} = getWebGL2TextureParameters(data);\n\n    // TODO: check height-width or width-height\n    // Regardless, images usually square\n    // TODO: handle cases of 256x256x1 instead of 1x256x256\n    const [z, height, width] = shape;\n\n    // Since we now use WebGL2 data types for 8-bit textures, we set the following for all textures\n    const mipmaps = false;\n    const parameters = DEFAULT_HIGH_BIT_TEXTURE_PARAMETERS;\n\n    if (!split) {\n      return {\n        data,\n        width,\n        height,\n        format,\n        dataFormat,\n        type,\n        parameters,\n        mipmaps\n      };\n    }\n\n    // Split into individual arrays\n    const channels: Texture2DProps[] = [];\n    const channelSize = height * width;\n    for (let i = 0; i < z; i++) {\n      channels.push({\n        data: data.subarray(i * channelSize, (i + 1) * channelSize),\n        width,\n        height,\n        format,\n        dataFormat,\n        type,\n        parameters,\n        mipmaps\n      });\n    }\n    return channels;\n  } catch {\n    return null;\n  }\n}\n\n/**\n * Create texture data for categorical colormap scale\n * @param categoricalOptions - color map configuration and min-max values of categorical band\n * @returns texture data\n */\nexport function generateCategoricalColormapTexture(\n  categoricalOptions: CategoricalColormapOptions\n): Texture2DProps {\n  const data = generateCategoricalBitmapArray(categoricalOptions);\n  return {\n    data,\n    width: CATEGORICAL_TEXTURE_WIDTH,\n    height: 1,\n    format: GL.RGBA,\n    dataFormat: GL.RGBA,\n    type: GL.UNSIGNED_BYTE,\n    parameters: COLORMAP_TEXTURE_PARAMETERS,\n    mipmaps: false\n  };\n}\n\n// TODO: would probably be simpler to only pass in the props actually used by this function. That\n// would mean a smaller object than RenderSubLayersProps\n// eslint-disable-next-line max-statements, complexity\nexport function getModules({\n  images,\n  props\n}: {\n  images: Partial<ImageData>;\n  props?: RenderSubLayersProps;\n}): {\n  modules: ShaderModule[];\n  moduleProps: Record<string, any>;\n} {\n  const moduleProps: Record<string, any> = {};\n  // Array of luma.gl WebGL modules to pass to the RasterLayer\n  const modules: ShaderModule[] = [];\n\n  // use rgba image directly. Used for raster .pmtiles rendering\n  if (images.imageRgba) {\n    modules.push(rgbaImage);\n\n    // no support for other modules atm for direct rgba mode\n    return {modules, moduleProps};\n  }\n\n  if (!props) {\n    return {modules, moduleProps};\n  }\n\n  const {\n    renderBandIndexes,\n    nonLinearRescaling,\n    linearRescalingFactor,\n    minPixelValue,\n    maxPixelValue,\n    gammaContrastFactor,\n    sigmoidalContrastFactor,\n    sigmoidalBiasFactor,\n    saturationValue,\n    bandCombination,\n    filterEnabled,\n    filterRange,\n    dataType,\n    minCategoricalBandValue,\n    maxCategoricalBandValue,\n    hasCategoricalColorMap\n  } = props;\n\n  if (Array.isArray(images.imageBands) && images.imageBands.length > 0) {\n    modules.push(getCombineBandsModule(images.imageBands));\n  }\n\n  if (images.imageMask) {\n    modules.push(getImageMaskModule(images.imageMask));\n    // In general, data masks are 0 for nodata and the maximum value for valid data, e.g. 255 or\n    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modules.push(modifiedSoilAdjustedVegetationIndex);\n      break;\n    default:\n      break;\n  }\n\n  if (isFilterAllowed(bandCombination) && filterEnabled) {\n    modules.push(filter);\n    moduleProps.filterMin1 = filterRange[0];\n    moduleProps.filterMax1 = filterRange[1];\n  }\n\n  // Apply colormap\n  if (isColormapAllowed(bandCombination) && images.imageColormap) {\n    modules.push(colormapModule);\n    moduleProps.minCategoricalBandValue = minCategoricalBandValue;\n    moduleProps.maxCategoricalBandValue = maxCategoricalBandValue;\n    moduleProps.dataTypeMaxValue = dtypeMaxValue[dataType];\n    moduleProps.maxPixelValue = maxPixelValue;\n  }\n\n  return {modules, 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