@loaders.gl/textures
Version:
Framework-independent loaders for compressed and super compressed (basis) textures
45 lines (44 loc) • 2.05 kB
JavaScript
// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { ImageLoader } from '@loaders.gl/images';
import { getImageUrls } from "./load-image.js";
import { deepLoad } from "./deep-load.js";
// Returned map will be have keys corresponding to GL cubemap constants
const GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515;
const GL_TEXTURE_CUBE_MAP_NEGATIVE_X = 0x8516;
const GL_TEXTURE_CUBE_MAP_POSITIVE_Y = 0x8517;
const GL_TEXTURE_CUBE_MAP_NEGATIVE_Y = 0x8518;
const GL_TEXTURE_CUBE_MAP_POSITIVE_Z = 0x8519;
const GL_TEXTURE_CUBE_MAP_NEGATIVE_Z = 0x851a;
const CUBE_FACES = [
{ face: GL_TEXTURE_CUBE_MAP_POSITIVE_X, direction: 'right', axis: 'x', sign: 'positive' },
{ face: GL_TEXTURE_CUBE_MAP_NEGATIVE_X, direction: 'left', axis: 'x', sign: 'negative' },
{ face: GL_TEXTURE_CUBE_MAP_POSITIVE_Y, direction: 'top', axis: 'y', sign: 'positive' },
{ face: GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, direction: 'bottom', axis: 'y', sign: 'negative' },
{ face: GL_TEXTURE_CUBE_MAP_POSITIVE_Z, direction: 'front', axis: 'z', sign: 'positive' },
{ face: GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, direction: 'back', axis: 'z', sign: 'negative' }
];
// Returns an object with six key-value pairs containing the urls (or url mip arrays)
// for each cube face
export async function getImageCubeUrls(getUrl, options) {
// Calculate URLs
const urls = {};
const promises = [];
let index = 0;
for (let i = 0; i < CUBE_FACES.length; ++i) {
const face = CUBE_FACES[index];
const promise = getImageUrls(getUrl, options, { ...face, index: index++ }).then((url) => {
urls[face.face] = url;
});
promises.push(promise);
}
await Promise.all(promises);
return urls;
}
// Returns an object with six key-value pairs containing the images (or image mip arrays)
// for each cube face
export async function loadImageTextureCube(getUrl, options = {}) {
const urls = await getImageCubeUrls(getUrl, options);
return (await deepLoad(urls, ImageLoader.parse, options));
}