@pixi/core/lib/textures/resources/ArrayResource.mjs

Core PixiJS

import { TARGETS } from '@pixi/constants';
import { AbstractMultiResource } from './AbstractMultiResource.mjs';

class ArrayResource extends AbstractMultiResource {
  constructor(source, options) {
    const { width, height } = options || {};
    let urls;
    let length;
    if (Array.isArray(source)) {
      urls = source;
      length = source.length;
    } else {
      length = source;
    }
    super(length, { width, height });
    if (urls) {
      this.initFromArray(urls, options);
    }
  }
  addBaseTextureAt(baseTexture, index) {
    if (baseTexture.resource) {
      this.addResourceAt(baseTexture.resource, index);
    } else {
      throw new Error("ArrayResource does not support RenderTexture");
    }
    return this;
  }
  bind(baseTexture) {
    super.bind(baseTexture);
    baseTexture.target = TARGETS.TEXTURE_2D_ARRAY;
  }
  upload(renderer, texture, glTexture) {
    const { length, itemDirtyIds, items } = this;
    const { gl } = renderer;
    if (glTexture.dirtyId < 0) {
      gl.texImage3D(gl.TEXTURE_2D_ARRAY, 0, glTexture.internalFormat, this._width, this._height, length, 0, texture.format, glTexture.type, null);
    }
    for (let i = 0; i < length; i++) {
      const item = items[i];
      if (itemDirtyIds[i] < item.dirtyId) {
        itemDirtyIds[i] = item.dirtyId;
        if (item.valid) {
          gl.texSubImage3D(gl.TEXTURE_2D_ARRAY, 0, 0, 0, i, item.resource.width, item.resource.height, 1, texture.format, glTexture.type, item.resource.source);
        }
      }
    }
    return true;
  }
}

export { ArrayResource };
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