"use strict";
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculateIm2ColDims = exports.createIm2ColProgramInfoLoader = void 0;
const types_1 = require("../types");
const createIm2ColProgramMetadata = (cacheHint) => ({
    name: 'Im2Col',
    inputNames: ['X'],
    inputTypes: [types_1.TextureType.unpacked],
    cacheHint,
});
const createIm2ColProgramInfo = (inferenceHandler, metadata, x, w, outputShape, attributes) => {
    const xshape = x.dims;
    const wshape = w.dims;
    const rank = outputShape.length;
    const im2colDims = (0, exports.calculateIm2ColDims)(xshape, wshape, outputShape, 4);
    const shaderSource = `
        const int XC = ${xshape[1]};
        const int XH = ${xshape[2]};
        const int XW = ${xshape[3]};
        const int KH = ${attributes.kernelShape[0]};
        const int KW = ${attributes.kernelShape[1]};
        const int dilationH = ${attributes.dilations[0]};
        const int dilationW = ${attributes.dilations[1]};
        const int strideH = ${attributes.strides[0]};
        const int strideW = ${attributes.strides[1]};
        const int padH = ${attributes.pads[0]};
        const int padW = ${attributes.pads[1]};
        const int KHKW = KH*KW;
        const int XCKHKW = XC * KHKW;
        const int outputChannels = 4;
        vec4 process(int indices[${rank}]) {
          int b  = indices[0]; // batch size
          int oh = indices[1] * strideH - padH; //output height
          int ow = indices[2] * strideW - padW; //output width
          int p = indices[3] * outputChannels; //patch
          vec4 value = vec4(0.0);
          for(int i=0; i < outputChannels; ++i) {
            if(p < XCKHKW) {
              int patchC = p / KHKW;
              int patchH = (p - patchC*KHKW) / KW;
              int patchW = (p - patchC*KHKW) - patchH * KW;
              int xh2 = oh + patchH * dilationH;
              int xw2 = ow + patchW * dilationW;
              int x[${xshape.length}];
              x[0] = b;
              x[1] = patchC;
              x[2] = xh2;
              x[3] = xw2;
              if(xh2 >= 0 &&
                  xh2 < XH &&
                  xw2 >= 0 &&
                  xw2 < XW) {
                value[i] = _X(x);
              }
            }
            ++p;
          }
          return value;
        }
        `;
    return Object.assign(Object.assign({}, metadata), { output: { dims: im2colDims, type: x.type, textureType: types_1.TextureType.packedLastDimension }, shaderSource });
};
const createIm2ColProgramInfoLoader = (inferenceHandler, x, w, outputShape, attributes) => {
    const metadata = createIm2ColProgramMetadata(attributes.cacheKey);
    return Object.assign(Object.assign({}, metadata), { get: () => createIm2ColProgramInfo(inferenceHandler, metadata, x, w, outputShape, attributes) });
};
exports.createIm2ColProgramInfoLoader = createIm2ColProgramInfoLoader;
const calculateIm2ColDims = (inputShape, kernelShape, outputShape, channels = 4) => [outputShape[0], outputShape[2], outputShape[3],
    Math.ceil(inputShape[1] * kernelShape[2] * kernelShape[3] / channels)];
exports.calculateIm2ColDims = calculateIm2ColDims;
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