gx

chenyc

2025-02-12 ea42ff3ebee1eeb3fb29423aa848a249441db81c

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/**
 * @license
 * Copyright 2017 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { getCoordsDataType } from './shader_compiler';
export class PadProgram {
    constructor(xShape, paddings, constantValue) {
        this.variableNames = ['x'];
        this.customUniforms = [{ name: 'value', type: 'float' }];
        this.outputShape = paddings.map((p, i) => p[0] /* beforePad */ + xShape[i] + p[1] /* afterPad */);
        const rank = xShape.length;
        const type = getCoordsDataType(rank);
        const start = paddings.map(p => p[0]).join(',');
        const end = paddings.map((p, i) => p[0] + xShape[i]).join(',');
        const unpackedCoords = ['coords[0]', 'coords[1]', 'coords[2]', 'coords[3]'].slice(0, rank);
        if (rank === 1) {
            this.userCode = `
        int start = ${start};
        int end = ${end};
 
        void main() {
          int outC = getOutputCoords();
          if (outC < start || outC >= end) {
            setOutput(value);
          } else {
            setOutput(getX(outC - start));
          }
        }
      `;
            return;
        }
        this.userCode = `
      ${type} start = ${type}(${start});
      ${type} end = ${type}(${end});
 
      void main() {
        ${type} outC = getOutputCoords();
        if (any(lessThan(outC, start)) || any(greaterThanEqual(outC, end))) {
          setOutput(value);
        } else {
          ${type} coords = outC - start;
          setOutput(getX(${unpackedCoords}));
        }
      }
    `;
    }
}
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