QGIS API Documentation 3.41.0-Master (3c143d501a8)
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qgscliptominmaxenhancement.cpp
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1/* **************************************************************************
2 qgscliptominmaxenhancement.cpp - description
3 -------------------
4begin : Fri Nov 16 2007
5copyright : (C) 2007 by Peter J. Ersts
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
21
22QgsClipToMinMaxEnhancement::QgsClipToMinMaxEnhancement( Qgis::DataType qgsRasterDataType, double minimumValue, double maximumValue ) : QgsContrastEnhancementFunction( qgsRasterDataType, minimumValue, maximumValue )
23{
24}
25
27{
28 if ( value < mMinimumValue || value > mMaximumValue )
29 {
30 return -1;
31 }
32
34 {
35 return static_cast<int>( value );
36 }
37 else
38 {
39 return static_cast<int>( ( ( ( value - mMinimumValuePossible ) / ( mMaximumValuePossible - mMinimumValuePossible ) ) * 255.0 ) );
40 }
41}
42
44{
45 return !( value < mMinimumValue || value > mMaximumValue );
46}
DataType
Raster data types.
Definition qgis.h:351
@ Byte
Eight bit unsigned integer (quint8)
bool isValueInDisplayableRange(double) override
A customizable method to indicate if a pixel's value is within the displayable range.
int enhance(double) override
A customizable method that takes in a double value and returns a int between 0 and 255.
QgsClipToMinMaxEnhancement(Qgis::DataType, double, double)
A contrast enhancement function is the base class for all raster contrast enhancements.
double mMaximumValue
User defineable maximum value for the band, used for enhanceContrasting.
Qgis::DataType mQgsRasterDataType
Data type of the band.