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qgscliptominmaxenhancement.cpp
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1 /* **************************************************************************
2  qgscliptominmaxenhancement.cpp - description
3  -------------------
4 begin : Fri Nov 16 2007
5 copyright : (C) 2007 by Peter J. Ersts
6 email : ersts@amnh.org
7 
8 ****************************************************************************/
9 
10 /* **************************************************************************
11  * *
12  * This program is free software; you can redistribute it and/or modify *
13  * it under the terms of the GNU General Public License as published by *
14  * the Free Software Foundation; either version 2 of the License, or *
15  * (at your option) any later version. *
16  * *
17  ***************************************************************************/
18 
20 
21 QgsClipToMinMaxEnhancement::QgsClipToMinMaxEnhancement( QGis::DataType theQgsRasterDataType, double theMinimumValue, double theMaximumValue ) : QgsContrastEnhancementFunction( theQgsRasterDataType, theMinimumValue, theMaximumValue )
22 {
23 }
24 
26 {
27  if ( theValue < mMinimumValue || theValue > mMaximumValue )
28  {
29  return -1;
30  }
31 
33  {
34  return static_cast<int>( theValue );
35  }
36  else
37  {
39  }
40 }
41 
43 {
44  if ( theValue < mMinimumValue || theValue > mMaximumValue )
45  {
46  return false;
47  }
48 
49  return true;
50 }
int enhance(double)
A customizable method that takes in a double and returns a int between 0 and 255. ...
bool isValueInDisplayableRange(double)
A customicable method to indicate if the pixels is displayable.
QgsClipToMinMaxEnhancement(QGis::DataType, double, double)
static double maximumValuePossible(QGis::DataType)
Helper function that returns the maximum possible value for a GDAL data type.
static double minimumValuePossible(QGis::DataType)
Helper function that returns the minimum possible value for a GDAL data type.
A contrast enhancement funcion is the base class for all raster contrast enhancements.
double mMaximumValue
User defineable maximum value for the band, used for enhanceContrasting.
DataType
Raster data types.
Definition: qgis.h:204
QGis::DataType mQgsRasterDataType
Data type of the band.