Method validateSettings

src/backend/web-gl/kernel.js:252–328

* @desc Validate settings related to Kernel, such as dimensions size, and auto output support. * @param {IArguments} args

(args)

   * @param {IArguments} args
   */
  validateSettings(args) {
    if (!this.validate) {
      this.texSize = utils.getKernelTextureSize({
        optimizeFloatMemory: this.optimizeFloatMemory,
        precision: this.precision,
      }, this.output);
      return;
    }

    const { features } = this.constructor;

    if (this.optimizeFloatMemory === true && !features.isTextureFloat) {
      throw new Error('Float textures are not supported');
    } else if (this.precision === 'single' && !features.isFloatRead) {
      throw new Error('Single precision not supported');
    } else if (!this.graphical && this.precision === null && features.isTextureFloat) {
      this.precision = features.isFloatRead ? 'single' : 'unsigned';
    }

    if (this.subKernels && this.subKernels.length > 0 && !this.extensions.WEBGL_draw_buffers) {
      throw new Error('could not instantiate draw buffers extension');
    }

    if (this.fixIntegerDivisionAccuracy === null) {
      this.fixIntegerDivisionAccuracy = !features.isIntegerDivisionAccurate;
    } else if (this.fixIntegerDivisionAccuracy && features.isIntegerDivisionAccurate) {
      this.fixIntegerDivisionAccuracy = false;
    }

    this.checkOutput();

    if (!this.output || this.output.length === 0) {
      if (args.length !== 1) {
        throw new Error('Auto output only supported for kernels with only one input');
      }

      const argType = utils.getVariableType(args[0], this.strictIntegers);
      switch (argType) {
        case 'Array':
          this.output = utils.getDimensions(argType);
          break;
        case 'NumberTexture':
        case 'MemoryOptimizedNumberTexture':
        case 'ArrayTexture(1)':
        case 'ArrayTexture(2)':
        case 'ArrayTexture(3)':
        case 'ArrayTexture(4)':
          this.output = args[0].output;
          break;
        default:
          throw new Error('Auto output not supported for input type: ' + argType);
      }
    }

    if (this.graphical) {
      if (this.output.length !== 2) {
        throw new Error('Output must have 2 dimensions on graphical mode');
      }