File indexing completed on 2024-05-12 15:58:39

 /*
  *  This file is part of the KDE project
  *
  *  SPDX-FileCopyrightText: 2008 Cyrille Berger <cberger@cberger.net>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef _KIS_RANDOM_GENERATOR_H_
 #define _KIS_RANDOM_GENERATOR_H_
 
 #include <kritaimage_export.h>
 
 #include <QtGlobal>
 
 /**
  * This is a class that return a pseudo-random number that will be constant for a given
  * pixel coordinate.
  * The rational is that filters that use random number (such as noises, or raindrops)
  * needs to always get the same random value at each run, or else the result will constantly
  * changes when used as an adjustment layer.
  */
 class KRITAIMAGE_EXPORT KisRandomGenerator
 {
 public:
     /**
      * Creates a new instance of a random generator with the given seed.
      */
     KisRandomGenerator(quint64 seed);
     ~KisRandomGenerator();
     /**
      * @return the constant random value corresponding to a given pixel, the value is between 0
      *         and RAND_MAX
      */
     quint64 randomAt(qint64 x, qint64 y);
     /**
      * @return the constant random value corresponding to a given pixel, the value is between 0
      *         and 1.0
      */
     double doubleRandomAt(qint64 x, qint64 y);
 private:
     struct Private;
     Private* const d;
 };
 
 #endif