QGIS API Documentation  3.24.2-Tisler (13c1a02865)
qgsraster.cpp
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1 /***************************************************************************
2  qgsraster.cpp - Raster namespace
3  --------------------------------------
4  Date : Apr, 2013
5  Copyright : (C) 2013 by Radim Blazek
6  email : radim dot blazek at gmail dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #include <limits>
19 
20 #include "qgsraster.h"
21 
22 bool QgsRaster::isRepresentableValue( double value, Qgis::DataType dataType )
23 {
24  switch ( dataType )
25  {
27  return value >= std::numeric_limits<quint8>::min() && value <= std::numeric_limits<quint8>::max();
29  return value >= std::numeric_limits<quint16>::min() && value <= std::numeric_limits<quint16>::max();
31  return value >= std::numeric_limits<qint16>::min() && value <= std::numeric_limits<qint16>::max();
33  return value >= std::numeric_limits<quint32>::min() && value <= std::numeric_limits<quint32>::max();
35  return value >= std::numeric_limits<qint32>::min() && value <= std::numeric_limits<qint32>::max();
37  return std::isnan( value ) || std::isinf( value ) ||
38  ( value >= -std::numeric_limits<float>::max() && value <= std::numeric_limits<float>::max() );
39  default:
40  return true;
41  break;
42  }
43 }
44 
45 double QgsRaster::representableValue( double value, Qgis::DataType dataType )
46 {
47  switch ( dataType )
48  {
50  return static_cast<quint8>( value );
52  return static_cast<quint16>( value );
54  return static_cast<qint16>( value );
56  return static_cast<quint32>( value );
58  return static_cast<qint32>( value );
60  return static_cast<float>( value );
61  default:
62  break;
63  }
64  return value;
65 }
DataType
Raster data types.
Definition: qgis.h:121
@ Float32
Thirty two bit floating point (float)
@ Int16
Sixteen bit signed integer (qint16)
@ UInt16
Sixteen bit unsigned integer (quint16)
@ Byte
Eight bit unsigned integer (quint8)
@ Int32
Thirty two bit signed integer (qint32)
@ UInt32
Thirty two bit unsigned integer (quint32)
static bool isRepresentableValue(double value, Qgis::DataType dataType)
Check if the specified value is representable in the given data type.
Definition: qgsraster.cpp:22
static double representableValue(double value, Qgis::DataType dataType)
Gets value representable by given data type.
Definition: qgsraster.cpp:45