/usr/include/qgis/qgscubicrasterresampler.h is in libqgis-dev 2.14.11+dfsg-3+deb9u1.
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qgscubicrasterresampler.h
----------------------------
begin : December 2011
copyright : (C) 2011 by Marco Hugentobler
email : marco at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef QGSCUBICRASTERRESAMPLER_H
#define QGSCUBICRASTERRESAMPLER_H
#include "qgsrasterresampler.h"
#include <QColor>
/** \ingroup core
Cubic Raster Resampler
*/
class CORE_EXPORT QgsCubicRasterResampler: public QgsRasterResampler
{
public:
QgsCubicRasterResampler();
~QgsCubicRasterResampler();
QgsCubicRasterResampler * clone() const override;
void resample( const QImage& srcImage, QImage& dstImage ) override;
QString type() const override { return "cubic"; }
private:
static void xDerivativeMatrix( int nCols, int nRows, double* matrix, const int* colorMatrix );
static void yDerivativeMatrix( int nCols, int nRows, double* matrix, const int* colorMatrix );
void calculateControlPoints( int nCols, int nRows, int currentRow, int currentCol, int* redMatrix, int* greenMatrix, int* blueMatrix,
int* alphaMatrix, double* xDerivativeMatrixRed, double* xDerivativeMatrixGreen, double* xDerivativeMatrixBlue,
double* xDerivativeMatrixAlpha, double* yDerivativeMatrixRed, double* yDerivativeMatrixGreen, double* yDerivativeMatrixBlue,
double* yDerivativeMatrixAlpha );
/** Use cubic curve interpoation at the borders of the raster*/
QRgb curveInterpolation( QRgb pt1, QRgb pt2, double t, double d1red, double d1green, double d1blue, double d1alpha, double d2red, double d2green,
double d2blue, double d2alpha );
static inline double calcBernsteinPolyN3( int i, double t );
static inline int lowerN3( int i );
//creates a QRgb by applying bounds checks
static inline QRgb createPremultipliedColor( const int r, const int g, const int b, const int a );
//control points
//red
double cRed00;
double cRed10;
double cRed20;
double cRed30;
double cRed01;
double cRed11;
double cRed21;
double cRed31;
double cRed02;
double cRed12;
double cRed22;
double cRed32;
double cRed03;
double cRed13;
double cRed23;
double cRed33;
//green
double cGreen00;
double cGreen10;
double cGreen20;
double cGreen30;
double cGreen01;
double cGreen11;
double cGreen21;
double cGreen31;
double cGreen02;
double cGreen12;
double cGreen22;
double cGreen32;
double cGreen03;
double cGreen13;
double cGreen23;
double cGreen33;
//blue
double cBlue00;
double cBlue10;
double cBlue20;
double cBlue30;
double cBlue01;
double cBlue11;
double cBlue21;
double cBlue31;
double cBlue02;
double cBlue12;
double cBlue22;
double cBlue32;
double cBlue03;
double cBlue13;
double cBlue23;
double cBlue33;
//alpha
double cAlpha00;
double cAlpha10;
double cAlpha20;
double cAlpha30;
double cAlpha01;
double cAlpha11;
double cAlpha21;
double cAlpha31;
double cAlpha02;
double cAlpha12;
double cAlpha22;
double cAlpha32;
double cAlpha03;
double cAlpha13;
double cAlpha23;
double cAlpha33;
};
#endif // QGSCUBICRASTERRESAMPLER_H
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