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// Copyright (C) 1999-2018
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include "colorscalergb.h"
ColorScaleRGB::ColorScaleRGB(int s)
{
size_ = s;
psColors_ = new unsigned char[s];
memset(psColors_, '0', size_);
}
ColorScaleRGB::~ColorScaleRGB()
{
if (psColors_)
delete [] psColors_;
}
LinearScaleRGB::LinearScaleRGB(int jj, int ss, unsigned char* colorCells,
int count)
: ColorScaleRGB(ss)
{
for (int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(aa * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
LogScaleRGB::LogScaleRGB(int jj, int ss, unsigned char* colorCells,
int count, double exp)
: ColorScaleRGB(ss)
{
for (int ii=0; ii<ss; ii++) {
double aa = log10(exp*double(ii)/ss +1) / log10(exp);
int ll = (int)(aa * count);
// aa can grow slightly greater than 1
if (ll>=count)
ll = count-1;
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
PowScaleRGB::PowScaleRGB(int jj, int ss, unsigned char* colorCells,
int count, double exp)
: ColorScaleRGB(ss)
{
for (int ii=0; ii<ss; ii++) {
double aa = (::pow(exp,double(ii)/ss) -1) / exp;
int ll = (int)(aa * count);
// should not be needed
if (ll>=count)
ll = count-1;
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
SqrtScaleRGB::SqrtScaleRGB(int jj, int ss, unsigned char* colorCells, int count)
: ColorScaleRGB(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(sqrt(aa) * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
SquaredScaleRGB::SquaredScaleRGB(int jj, int ss, unsigned char* colorCells,
int count)
: ColorScaleRGB(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(aa*aa * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
AsinhScaleRGB::AsinhScaleRGB(int jj, int ss, unsigned char* colorCells,
int count)
: ColorScaleRGB(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(asinh(10*aa)/3 * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
SinhScaleRGB::SinhScaleRGB(int jj, int ss, unsigned char* colorCells,
int count)
: ColorScaleRGB(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(sinh(3*aa)/10 * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
HistEquScaleRGB::HistEquScaleRGB(int jj, int ss, unsigned char* colorCells,
int count, double* hist, int histsize)
: ColorScaleRGB(ss)
{
// if no histogram, return linear distribution
if (!hist)
for (int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(aa * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
else
for (int ii=0; ii<ss; ii++) {
double aa = hist[ii*histsize/ss];
int ll = (int)(aa * count);
memcpy(psColors_+ii, colorCells+ll*3+jj,1);
}
}
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