LinearGradient.h

#ifndef LINEAR_GRADIENT_H
#define LINEAR_GRADIENT_H

#include "Stop.h"
#include <gdiplus.h>
#include <iostream>

using namespace std;

class LinearGradient {
private:
  string id;
  double x1, x2, y1, y2;
  vector<Stop> stops;

public:
  LinearGradient(string id, double x1, double x2, double y1, double y2,
                 vector<Stop> stops)
      : id(id), x1(x1), x2(x2), y1(y1), y2(y2), stops(stops) {}
  LinearGradientBrush *&createBrush() {
    LinearGradientBrush *brush =
        new LinearGradientBrush(PointF(x1, y1), PointF(x2, y2), stops[0].color,
                                stops[stops.size() - 1].color);
    Color *color = new Color[stops.size()];
    for (int i = 0; i < stops.size(); i++) {
      color[i] = stops[i].color;
    }
    float *positions = new float[stops.size()];
    for (int i = 0; i < stops.size(); i++) {
      positions[i] = stops[i].offset / stops[stops.size() - 1].offset;
    }
    brush->SetInterpolationColors(color, positions, stops.size());
    return brush;
  }
  string getId() { return id; }
};

#endif