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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import macro from 'vtk.js/Sources/macros';
import ImageHelper from 'vtk.js/Sources/Common/Core/ImageHelper';
import vtkTexture from 'vtk.js/Sources/Rendering/Core/Texture';
import { strFromU8, unzipSync } from 'fflate';
// ----------------------------------------------------------------------------
// vtkSkyboxReader methods
// ----------------------------------------------------------------------------
function vtkSkyboxReader(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkSkyboxReader');
// Internal method to fetch Array
function fetchData(url, option = {}) {
const { compression, progressCallback } = model;
return model.dataAccessHelper.fetchBinary(url, {
compression,
progressCallback,
});
}
// Set DataSet url
publicAPI.setUrl = (url, option = {}) => {
model.url = url;
// Fetch metadata
return publicAPI.loadData(option);
};
// Fetch the actual data arrays
publicAPI.loadData = (option = {}) =>
fetchData(model.url, option).then(publicAPI.parseAsArrayBuffer);
publicAPI.parseAsArrayBuffer = (content) => {
if (!content) {
return false;
}
model.textures = {};
model.busy = true;
publicAPI.invokeBusy(model.busy);
model.dataMapping = {};
const imageReady = [];
// Finish data processing
function workDone() {
for (let i = 0; i < model.positions.length; i++) {
const key = model.positions[i];
const images = model.dataMapping[key];
if (!model.textures[key]) {
model.textures[key] = vtkTexture.newInstance({ interpolate: true });
}
if (images) {
const texture = model.textures[key];
for (let idx = 0; idx < 6; idx++) {
const { fileName, transform } = model.faceMapping[idx];
const readyIndex = imageReady.indexOf(`${key}/${fileName}`);
if (readyIndex !== -1) {
texture.setInputData(
ImageHelper.imageToImageData(images[fileName], transform),
idx
);
// Free image
URL.revokeObjectURL(images[fileName].src);
delete images[fileName];
// Don't process again
imageReady.splice(readyIndex, 1);
}
}
}
}
model.busy = false;
publicAPI.modified();
publicAPI.invokeBusy(model.busy);
}
const decompressedFiles = unzipSync(new Uint8Array(content));
const pending = [];
// Find root index.json
Object.entries(decompressedFiles).forEach(([relativePath, fileData]) => {
if (relativePath.match(/index.json$/)) {
const txt = strFromU8(fileData);
const config = JSON.parse(txt);
if (config.skybox && config.skybox.faceMapping) {
model.faceMapping = config.skybox.faceMapping;
}
if (
config.metadata &&
config.metadata.skybox &&
config.metadata.skybox.faceMapping
) {
model.faceMapping = config.metadata.skybox.faceMapping;
}
}
if (relativePath.match(/\.jpg$/)) {
const pathTokens = relativePath.split('/');
const fileName = pathTokens.pop();
const key = pathTokens.pop();
if (!model.dataMapping[key]) {
model.dataMapping[key] = {};
}
const blob = new Blob([fileData.buffer]);
const img = new Image();
const readyKey = `${key}/${fileName}`;
model.dataMapping[key][fileName] = img;
pending.push(
new Promise((resolve) => {
img.onload = () => {
imageReady.push(readyKey);
resolve();
};
})
);
img.src = URL.createObjectURL(blob);
}
});
model.positions = Object.keys(model.dataMapping);
model.position = model.positions[0];
Promise.all(pending).then(() => {
workDone();
});
return publicAPI.getReadyPromise();
};
publicAPI.requestData = (inData, outData) => {
outData[0] = model.textures[model.position];
};
publicAPI.setPosition = (name) => {
if (model.positions.indexOf(name) !== -1 && name !== model.position) {
model.position = name;
publicAPI.modified();
}
};
publicAPI.getReadyPromise = () => {
if (!model.busy) {
return Promise.resolve(publicAPI);
}
return new Promise((resolve, reject) => {
const subscription = publicAPI.onBusy((isBusy) => {
if (!isBusy) {
subscription.unsubscribe();
resolve(publicAPI);
}
});
});
};
// return Busy state
publicAPI.isBusy = () => model.busy;
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
// url: null,
busy: false,
// everything must be flipped in Y due to canvas
// versus vtk ordering
faceMapping: [
{ fileName: 'right.jpg', transform: { flipY: true } },
{ fileName: 'left.jpg', transform: { flipY: true } },
{ fileName: 'up.jpg', transform: { flipY: true } },
{ fileName: 'down.jpg', transform: { flipY: true } },
{ fileName: 'back.jpg', transform: { flipY: true } },
{ fileName: 'front.jpg', transform: { flipY: true } },
],
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
macro.obj(publicAPI, model);
macro.get(publicAPI, model, ['url', 'positions', 'position']);
macro.setGet(publicAPI, model, ['faceMapping']);
macro.event(publicAPI, model, 'busy');
macro.algo(publicAPI, model, 0, 6);
// Object methods
vtkSkyboxReader(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkSkyboxReader');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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