BMP.hpp

static inline unsigned char* LoadBMP_24(const std::string &path) {
	int w, h;
	unsigned char *img = nullptr;

	std::ifstream inFile(path, std::ios::in | std::ios::binary);
	if (inFile.is_open()) {

		/// Header
		unsigned char hdr[0x36];
		inFile.read((char*) hdr, 0x12);
		inFile.read((char*) &w, 4);
		inFile.read((char*) &h, 4);
		inFile.read((char*) hdr, 0x1C);
    
        /// Use wR for image width as BMP files require the
		/// width be padded to a multiple of four bytes
		const int tR = ((w * 3) % 4), R = (tR == 0 ? 0 : (4 - tR)), wR = (w * 3) + R;
		
		/// Data
		img = new unsigned char[w * h * 3];
		
		unsigned char *raw = new unsigned char[wR * h];
		inFile.read((char*) raw, wR * h);
    
        for (int y = 0; y < h; ++y) {
            for (int x = 0; x < w; ++x) {
                const int i = (x + (y * w)) * 3;
                const int j = ((x * 3) + (y * wR));
                
                img[i+0] = raw[j+0];
                img[i+1] = raw[j+1];
                img[i+2] = raw[j+2];
            }
        }
    
        delete [] raw;
    
		printf("Loading: %s [SUCCESS]\n", path.c_str());
		inFile.close();
	}
	else {
		printf("Loading: %s [ ERROR ]\n", path.c_str());
	}
	return img;
};