Class FlipLeftRightProgram

tfjs-backend-webgpu/src/flip_left_right_webgpu.ts:21–51

import {computeDispatch, flatDispatchLayout} from './webgpu_util';

export class FlipLeftRightProgram implements WebGPUProgram {
  outputShape: number[] = [];
  shaderKey: string;
  dispatchLayout: {x: number[]};
  dispatch: [number, number, number];
  variableNames = ['x'];
  workgroupSize: [number, number, number] = [64, 1, 1];
  size = true;

  constructor(imageShape: [number, number, number, number]) {
    this.outputShape = imageShape;
    this.dispatchLayout = flatDispatchLayout(this.outputShape);
    this.dispatch = computeDispatch(
        this.dispatchLayout, this.outputShape, this.workgroupSize);
    this.shaderKey = 'flipLeftRight';
  }

  getUserCode(): string {
    const userCode = `
      ${main('index')} {
        if (index < uniforms.size) {
          let coords = getCoordsFromIndex(index);
          let coordX = uniforms.xShape[2] - coords[2] - 1;
          let outputValue = getX(coords[0], coords[1], coordX, coords[3]);
          setOutputAtIndex(index, outputValue);
        }
      }
    `;
    return userCode;
  }
}