@spearwolf/twopoint5d/lib/texture/TextureFactory.js

a library to create 2.5d realtime graphics and pixelart with three.js

import { LinearFilter, LinearSRGBColorSpace, NearestFilter, SRGBColorSpace, Texture, TextureLoader, WebGLRenderer, } from 'three';
const TextureClasses = {
    anisotrophy: {
        anisotrophy: Infinity,
    },
    'anisotrophy-2': {
        anisotrophy: 2,
    },
    'anisotrophy-4': {
        anisotrophy: 4,
    },
    'no-anisotrophy': {
        anisotrophy: 0,
    },
    nearest: {
        magFilter: NearestFilter,
        minFilter: NearestFilter,
    },
    'mag-nearest': {
        magFilter: NearestFilter,
    },
    'min-nearest': {
        minFilter: NearestFilter,
    },
    linear: {
        magFilter: LinearFilter,
        minFilter: LinearFilter,
    },
    'mag-linear': {
        magFilter: LinearFilter,
    },
    'min-linear': {
        minFilter: LinearFilter,
    },
    flipy: {
        flipY: true,
    },
    'no-flipy': {
        flipY: false,
    },
    srgb: {
        colorSpace: SRGBColorSpace,
    },
    'linear-srgb': {
        colorSpace: LinearSRGBColorSpace,
    },
};
const TextureClassPriority = {
    'no-anisotrophy': 1000,
    'anisotrophy-2': 500,
    'anisotrophy-4': 250,
    anisotrophy: 0,
    nearest: 1000,
    'mag-nearest': 500,
    'min-nearest': 500,
    linear: 1000,
    'mag-linear': 500,
    'min-linear': 500,
    flipy: 10,
    'no-flipy': 0,
    srgb: 0,
    'linear-srgb': 10,
};
export class TextureFactory {
    #maxAnisotrophy = 0;
    #defaultOptions;
    constructor(maxAnisotrophyOrRenderer = 0, defaultClassNames = ['nearest'], defaultOptions) {
        this.#maxAnisotrophy =
            typeof maxAnisotrophyOrRenderer === 'number'
                ? maxAnisotrophyOrRenderer
                : (maxAnisotrophyOrRenderer.capabilities?.getMaxAnisotropy?.() ??
                    maxAnisotrophyOrRenderer.getMaxAnisotropy?.());
        this.#defaultOptions = defaultOptions ?? {
            anisotrophy: 0,
            flipY: false,
        };
        this.#defaultOptions = this.getOptions(defaultClassNames);
        this.textureLoader = new TextureLoader();
    }
    getOptions(classNames) {
        const options = Object.assign({}, this.#defaultOptions, ...classNames
            .map((className) => [TextureClassPriority[className], TextureClasses[className]])
            .sort(([a], [b]) => b - a)
            .map(([, opts]) => opts));
        options.anisotrophy = Math.min(options.anisotrophy, this.#maxAnisotrophy);
        return options;
    }
    create(source, ...classNames) {
        const texture = new Texture(source);
        return this.update(texture, ...classNames);
    }
    update(texture, ...classNames) {
        Object.assign(texture, this.getOptions(classNames));
        texture.needsUpdate = true;
        return texture;
    }
    load(url, ...classNames) {
        return this.textureLoader.load(url, (texture) => {
            this.update(texture, ...classNames);
        });
    }
}
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