LoadTexture.h

#pragma once
#include "Common.h"
#include <iostream>
#include <vector>
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>


unsigned char* loadBMPTexture(const char* imagepath, unsigned int& Width,
	unsigned int& Height, unsigned int& BPP, unsigned int CHANNELS) {

	unsigned char header[54];
	unsigned int dataPos;
	unsigned int width, height;
	unsigned int imageSize;
	unsigned char* data;

	FILE* file = fopen(imagepath, "rb");
	if (!file) {
		printf("Error loading texture\n");
		return 0;
	}

	if (fread(header, 1, 54, file) != 54) {
		printf("Error: BMP file not correct!!\n");
		return 0;
	}

	if (header[0] != 'B' || header[1] != 'M') {
		printf("Error: BMP file not correct!!\n");
		return 0;
	}



	// Read ints from the byte array
	dataPos = *(int*)&(header[0x0A]);
	imageSize = *(int*)&(header[0x22]);
	width = *(int*)&(header[0x12]);
	height = *(int*)&(header[0x16]);

	if (imageSize == 0)    imageSize = width * height * CHANNELS; // 3 : one byte for each Red, Green and Blue component
	if (dataPos == 0)      dataPos = 54; // The BMP header is done that way

	// Create a buffer
	data = new unsigned char[imageSize];

	// Read the actual data from the file into the buffer
	fread(data, 1, imageSize, file);

	//Everything is in memory now, the file can be closed
	fclose(file);

	//std::cout << "Texture loaded successfully";
	Width = width;
	Height = height;
	BPP = imageSize;
	return data;
}