#include "ImageHelper.h"
#include <vector>
#include "../external/QRCode/QrCode.hpp"
//#include "GL/mesa_gl.h"
#include <GL/mesa_gl.h>
#include <GL/gl.h>

ImageHelper::ImageHelper()
{
}


ImageHelper::~ImageHelper()
{
}

GLuint ImageHelper::GetQr(std::string strcode)
{
	if (strcode.empty())return 0;
	std::vector<unsigned char> qrcode;
	qrcodegen::QrCode qr0 = qrcodegen::QrCode::encodeText(strcode.c_str(), qrcodegen::QrCode::Ecc::MEDIUM);
	for (int y = 0; y < qr0.getSize(); y++) {
		for (int x = 0; x < qr0.getSize(); x++) {
			if (qr0.getModule(x, y)) {
				qrcode.push_back(0);
				qrcode.push_back(0);
				qrcode.push_back(0);
			}
			else {
				qrcode.push_back(0xFF);
				qrcode.push_back(0xFF);
				qrcode.push_back(0xFF);
			}

		}
	}
	GLuint tex;
	glGenTextures(1, &tex);
	if (tex > 0) {
		glBindTexture(GL_TEXTURE_2D, tex);
		glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, qr0.getSize(), qr0.getSize(), 0, GL_RGB, GL_UNSIGNED_BYTE, &qrcode[0]);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, 0x812F);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, 0x812F);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		glBindTexture(GL_TEXTURE_2D, 0);
	}
	return tex;
}