text: /*
   * Copyright 2016 Google Inc.
   *
   * 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.
   */
  
  #include "guetzli/gamma_correct.h"
  
  #include <cmath>
  
  namespace guetzli {
  
  const double* NewSrgb8ToLinearTable() {
    double* table = new double[256];
    int i = 0;
    for (; i < 11; ++i) {
      table[i] = i / 12.92;
    }
    for (; i < 256; ++i) {
      table[i] = 255.0 * std::pow(((i / 255.0) + 0.055) / 1.055, 2.4);
    }
    return table;
  }
  
  const double* Srgb8ToLinearTable() {
    static const double* const kSrgb8ToLinearTable = NewSrgb8ToLinearTable();
    return kSrgb8ToLinearTable;
  }
  
  }  // namespace guetzli
  