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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 "colorscale.h"
ColorScale::ColorScale(int ss)
{
size_ = ss;
psColors_ = new unsigned char[ss*3];
memset(psColors_, '0', size_*3);
}
ColorScale::~ColorScale()
{
if (psColors_)
delete [] psColors_;
}
LinearScale::LinearScale(int ss, unsigned char* colorCells, int count)
: ColorScale(ss)
{
for (int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(aa * count);
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
LogScale::LogScale(int ss, unsigned char* colorCells, int count, double exp)
: ColorScale(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*3, colorCells+ll*3, 3);
}
}
PowScale::PowScale(int ss, unsigned char* colorCells, int count, double exp)
: ColorScale(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*3, colorCells+ll*3, 3);
}
}
SqrtScale::SqrtScale(int ss, unsigned char* colorCells, int count)
: ColorScale(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(sqrt(aa) * count);
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
SquaredScale::SquaredScale(int ss, unsigned char* colorCells, int count)
: ColorScale(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(aa*aa * count);
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
AsinhScale::AsinhScale(int ss, unsigned char* colorCells, int count)
: ColorScale(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(asinh(10*aa)/3 * count);
// it can spill over
if (ll>=count)
ll = count-1;
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
SinhScale::SinhScale(int ss, unsigned char* colorCells, int count)
: ColorScale(ss)
{
for(int ii=0; ii<ss; ii++) {
double aa = double(ii)/ss;
int ll = (int)(sinh(3*aa)/10 * count);
// it can spill over
if (ll>=count)
ll = count-1;
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
HistEquScale::HistEquScale(int ss, unsigned char* colorCells, int count,
double* hist, int histsize)
: ColorScale(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*3, colorCells+ll*3,3);
}
else {
for (int ii=0; ii<ss; ii++) {
double aa = hist[ii*histsize/ss];
int ll = (int)(aa * count);
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
}
}
IISScale::IISScale(unsigned char* colorCells, int count)
: ColorScale(IISSIZE)
{
for (int ii=0; ii<IISCOLORS; ii++) {
double aa = double(ii)/IISCOLORS;
int ll = (int)(aa * count);
memcpy(psColors_+ii*3, colorCells+ll*3,3);
}
unsigned char* ptr;
// 0 white (background)
ptr = psColors_;
*ptr++ = 255;
*ptr++ = 255;
*ptr++ = 255;
ptr = psColors_+IISMAX*3;
// 201 white
*ptr++ = 255;
*ptr++ = 255;
*ptr++ = 255;
// 202 black
*ptr++ = 0;
*ptr++ = 0;
*ptr++ = 0;
// 203 white
*ptr++ = 255;
*ptr++ = 255;
*ptr++ = 255;
// 204 red
*ptr++ = 0;
*ptr++ = 0;
*ptr++ = 255;
// 205 green
*ptr++ = 0;
*ptr++ = 255;
*ptr++ = 0;
// 206 blue
*ptr++ = 255;
*ptr++ = 0;
*ptr++ = 0;
// 207 yellow
*ptr++ = 0;
*ptr++ = 255;
*ptr++ = 255;
// 209 cyan
*ptr++ = 255;
*ptr++ = 255;
*ptr++ = 0;
// 209 magenta
*ptr++ = 255;
*ptr++ = 0;
*ptr++ = 255;
// 210 coral
*ptr++ = 80;
*ptr++ = 127;
*ptr++ = 255;
// 211 maroon
*ptr++ = 96;
*ptr++ = 48;
*ptr++ = 176;
// 212 orange
*ptr++ = 0;
*ptr++ = 165;
*ptr++ = 255;
// 213 khaki
*ptr++ = 140;
*ptr++ = 230;
*ptr++ = 240;
// 214 orchid
*ptr++ = 214;
*ptr++ = 112;
*ptr++ = 218;
// 215 turquoise
*ptr++ = 208;
*ptr++ = 224;
*ptr++ = 64;
// 216 violet
*ptr++ = 238;
*ptr++ = 130;
*ptr++ = 238;
// 217 wheat
*ptr++ = 179;
*ptr++ = 222;
*ptr++ = 245;
}
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