Frame caputurer for GLFW (with FreeImage)

FrameCapturer.cpp

#pragma once

#include <string>
#include <GLFW\glfw3.h>
#include <FreeImage\FreeImage.h>

using namespace std;

class FrameCapturer {
private:
	int width, height;
	BYTE* buffer;

public:
	static int count;

	FrameCapturer(int width, int height);
	~FrameCapturer();

	void capture(const string directory, const string filename) const;
};

int FrameCapturer::count = 0;

FrameCapturer::FrameCapturer(int width, int height) {
	this->width = width;
	this->height = height;
	this->buffer = new BYTE[3 * width * height];
	count = 0;
}

FrameCapturer::~FrameCapturer() {
	delete[] buffer;
}

void FrameCapturer::capture(const string dir, const string name) const {

	glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);

	FIBITMAP* image = FreeImage_ConvertFromRawBits(buffer, width, height, 3 * width, 24, 0x0000FF, 0xFF0000, 0x00FF00, false);

	string filename = dir + "\\" + name + "_" + to_string(count) + ".png";
	FreeImage_Save(FIF_PNG, image, filename.c_str(), 0);

	FreeImage_Unload(image);

	count++;
}