Function resizeProgram

tfjs-react-native/src/camera/camera_webgl_util.ts:333–365

(
    gl: WebGL2RenderingContext, sourceDims: Dimensions, targetDims: Dimensions,
    alignCorners: boolean,
    interpolation: 'nearest_neighbor'|'bilinear')

}

function resizeProgram(
    gl: WebGL2RenderingContext, sourceDims: Dimensions, targetDims: Dimensions,
    alignCorners: boolean,
    interpolation: 'nearest_neighbor'|'bilinear'): ProgramObjects {
  if (!programCacheByContext.has(gl)) {
    programCacheByContext.set(gl, new Map());
  }
  const programCache = programCacheByContext.get(gl);

  const cacheKey = `resize_${sourceDims.width}_${sourceDims.height}_${
      sourceDims.depth}_${targetDims.width}_${targetDims.height}_${
      targetDims.depth}_${alignCorners}_${interpolation}`;

  if (!programCache.has(cacheKey)) {
    const vertSource = resizeNNProgramInfo.vertexShaderSource();
    let fragSource: string;
    if (interpolation === 'nearest_neighbor') {
      fragSource = resizeNNProgramInfo.fragmentShaderSource(
          sourceDims, targetDims, alignCorners);
    } else {
      fragSource = resizeBilinearProgramInfo.fragmentShaderSource(
          sourceDims, targetDims, alignCorners);
    }

    const vertices = resizeNNProgramInfo.vertices();
    const texCoords = resizeNNProgramInfo.texCoords();
    const programObjects =
        createProgramObjects(gl, vertSource, fragSource, vertices, texCoords);

    programCache.set(cacheKey, programObjects);
  }
  return programCache.get(cacheKey);
}

function createProgramObjects(
    gl: WebGL2RenderingContext, vertexShaderSource: string,