onnxruntime

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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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import { NUMBER_TYPES } from '../../../operators';
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import { Tensor } from '../../../tensor';
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import { WebGLInferenceHandler } from '../inference-handler';
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import { ProgramInfo, ProgramMetadata, TextureType } from '../types';
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export const tile = (inferenceHandler: WebGLInferenceHandler, inputs: Tensor[]): Tensor[] => {
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  validateInputs(inputs);
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  const tileProgramMetadata = {
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    name: 'Tile',
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    inputNames: ['A'],
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    inputTypes: [TextureType.unpacked],
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  };
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  const output = inferenceHandler.run(
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    { ...tileProgramMetadata, get: () => createTileProgramInfo(inferenceHandler, inputs, tileProgramMetadata) },
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    inputs,
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  );
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  return [output];
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};
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const createTileProgramInfo = (
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  _handler: WebGLInferenceHandler,
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  inputs: Tensor[],
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  tileProgramMetadata: ProgramMetadata,
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): ProgramInfo => {
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  const inputShape = inputs[0].dims.slice();
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  const outputShape = new Array(inputShape.length);
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  const tileOps: string[] = [];
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  for (let i = 0; i < inputShape.length; i++) {
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    outputShape[i] = inputShape[i] * inputs[1].numberData[i];
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    tileOps.push(`inputIdx[${i}] = int(mod(float(outputIdx[${i}]), ${inputShape[i]}.));`);
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  }
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  const rank = outputShape.length;
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  const shaderSource = `
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      float process(int outputIdx[${rank}]) {
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        int inputIdx[${rank}];
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        ${tileOps.join('\n')}
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        return _A(inputIdx);
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      }
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    `;
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  return {
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    ...tileProgramMetadata,
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    output: { dims: outputShape, type: inputs[0].type, textureType: TextureType.unpacked },
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    shaderSource,
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  };
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};
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const validateInputs = (inputs: Tensor[]): void => {
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  if (!inputs || inputs.length !== 2) {
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    throw new Error('Tile requires 2 input.');
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  }
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  if (inputs[1].dims.length !== 1) {
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    throw new Error('The second input shape must 1 dimension.');
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  }
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  if (inputs[1].dims[0] !== inputs[0].dims.length) {
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    throw new Error('Invalid input shape.');
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  }
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  if (NUMBER_TYPES.indexOf(inputs[0].type) === -1) {
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    throw new Error('Invalid input type.');
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  }
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  if (inputs[1].type !== 'int32' && inputs[1].type !== 'int16') {
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    throw new Error('Invalid repeat type.');
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  }
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};
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