// testBMP.cpp: определяет точку входа для консольного приложения.
//

#include <iostream>
#include <fstream>    //подключили библиотеку для работы с map
#include "conio.h"

//using namespace std;
void write(char *img, char *msg);
void read();

void main()
{
	read();
	write(/*KUKUSIKI*/, "Hello!");
	system("pause");
}
void write(char *img, char *msg) {

	std::ofstream os("temp.bmp", std::ios::binary);

	unsigned char signature[2] = { 'B', 'M' };
	unsigned int fileSize = 14 + 40 + 1000 * 1000 * 4;
	unsigned int reserved = 0;
	unsigned int offset = 14 + 40;

	unsigned int headerSize = 40;
	unsigned int dimensions[2] = { 1000, 1000 };
	unsigned short colorPlanes = 1;
	unsigned short bpp = 32;
	unsigned int compression = 0;
	unsigned int imgSize = 1000 * 1000 * 4;
	unsigned int resolution[2] = { 2795, 2795 };
	unsigned int pltColors = 0;
	unsigned int impColors = 0;

	os.write(reinterpret_cast<char*>(signature), sizeof(signature));
	os.write(reinterpret_cast<char*>(&fileSize), sizeof(fileSize));
	os.write(reinterpret_cast<char*>(&reserved), sizeof(reserved));
	os.write(reinterpret_cast<char*>(&offset), sizeof(offset));

	os.write(reinterpret_cast<char*>(&headerSize), sizeof(headerSize));
	os.write(reinterpret_cast<char*>(dimensions), sizeof(dimensions));
	os.write(reinterpret_cast<char*>(&colorPlanes), sizeof(colorPlanes));
	os.write(reinterpret_cast<char*>(&bpp), sizeof(bpp));
	os.write(reinterpret_cast<char*>(&compression), sizeof(compression));
	os.write(reinterpret_cast<char*>(&imgSize), sizeof(imgSize));
	os.write(reinterpret_cast<char*>(resolution), sizeof(resolution));
	os.write(reinterpret_cast<char*>(&pltColors), sizeof(pltColors));
	os.write(reinterpret_cast<char*>(&impColors), sizeof(impColors));

	unsigned char x, r, g, b;
	unsigned msg_size = strlen(msg);
	unsigned msg_pos = 0;
	for (int i = 0; i < dimensions[1] * dimensions[0] * 4; ++i)
	{
		b = img[i++];
		g = img[i++];
		r = img[i++];
		x = img[i++];
		/*x = 0;
		b = 0;
		g = 0;
		r = rand() % 256;
		g = rand() % 256;
		b = rand() % 256;

		if (i > 100 && i < 900)//квадратик
			if(j > 100 && j < 900)
				r = 255;*/
		if (msg_pos <= msg_size) {
			char ch = msg[msg_pos];
			char ar = (ch & 0b11100000) >> 5;
			char ag = (ch & 0b00011100) >> 2;
			char ab = (ch & 0b00000011);

			r ^= ar;
			g ^= ag;
			b ^= ab;

			msg_pos++;
		}

		os.write(reinterpret_cast<char*>(&b), sizeof(b));
		os.write(reinterpret_cast<char*>(&g), sizeof(g));
		os.write(reinterpret_cast<char*>(&r), sizeof(r));
		os.write(reinterpret_cast<char*>(&x), sizeof(x));

	}

	os.close();
}

void read()

{
	std::ifstream os("temp.bmp", std::ios::binary);

	unsigned char signature[2] = { 'B', 'M' };
	unsigned int fileSize = 14 + 40 + 1000 * 1000 * 4;
	unsigned int reserved = 0;
	unsigned int offset = 14 + 40;

	unsigned int headerSize = 40;
	unsigned int dimensions[2] = { 1000, 1000 };
	unsigned short colorPlanes = 1;
	unsigned short bpp = 32;
	unsigned int compression = 0;
	unsigned int imgSize = 1000 * 1000 * 4;
	unsigned int resolution[2] = { 2795, 2795 };
	unsigned int pltColors = 0;
	unsigned int impColors = 0;

	os.read(reinterpret_cast<char*>(signature), sizeof(signature));	cout << "signature=" << signature << endl;
	os.read(reinterpret_cast<char*>(&fileSize), sizeof(fileSize));  cout << "fileSize=" << fileSize << endl;
	os.read(reinterpret_cast<char*>(&reserved), sizeof(reserved));  cout << "reserved=" << reserved << endl;
	os.read(reinterpret_cast<char*>(&offset), sizeof(offset));

	os.read(reinterpret_cast<char*>(&headerSize), sizeof(headerSize)); cout << "headerSize=" << headerSize << endl;
	os.read(reinterpret_cast<char*>(dimensions), sizeof(dimensions)); cout << "dimensions=" << dimensions[0] << " " << dimensions[1] << endl;
	os.read(reinterpret_cast<char*>(&colorPlanes), sizeof(colorPlanes)); cout << "colorPlanes=" << colorPlanes << endl;
	os.read(reinterpret_cast<char*>(&bpp), sizeof(bpp));        cout << "bpp=" << bpp << endl;
	os.read(reinterpret_cast<char*>(&compression), sizeof(compression)); cout << "compression=" << compression << endl;
	os.read(reinterpret_cast<char*>(&imgSize), sizeof(imgSize));	cout << "imgSize=" << imgSize << endl;
	os.read(reinterpret_cast<char*>(resolution), sizeof(resolution)); cout << "resolution=" << resolution[0] << " " << resolution[1] << endl;
	os.read(reinterpret_cast<char*>(&pltColors), sizeof(pltColors));  cout << "pltColors=" << pltColors << endl;
	os.read(reinterpret_cast<char*>(&impColors), sizeof(impColors));  cout << "impColors=" << impColors << endl;

	char *img;
	unsigned char x, r, g, b;

	for (int i = 0; i < dimensions[1]; ++i)
	{
		for (int j = 0; j < dimensions[0]; ++j)
		{

			os >> b;
			os >> g;
			os >> r;
			os >> x;

			img[i*dimensions[1] + j] = b;
			img[i*dimensions[1] + j + 1] = g;
			img[i*dimensions[1] + j + 2] = r;
			img[i*dimensions[1] + j+ 3 ] = x;
		}
	}
	//getch();
}

void Change() {

}