/* Converts a BMP image to an HTML table of colored cells. Each cell is 1 pixel in width and height. */ #include #include #include #include using namespace std; int main(int argc, char* argv[]) { if (argc != 3) { cout << "Converts a BMP image to an HTML table of colored cells." << endl << endl; cout << "BMPtoHTML.exe [input_bmp_filename] [output_html_filename]" << endl; return EXIT_SUCCESS; } string bmpFileName = argv[1]; string htmlFileName = argv[2]; //Open input BMP file fstream bmpFile; bmpFile.open(bmpFileName, fstream::in | fstream::binary); if (!bmpFile.is_open()) { cout << "Error opening input BMP file " << bmpFileName << endl; return EXIT_FAILURE; } //Read BMP file header BITMAPFILEHEADER bFileHeader; bmpFile.read((char*)&bFileHeader, sizeof(bFileHeader)); if ((bFileHeader.bfType != 0x4D42) &&//BM (bFileHeader.bfType != 0x4142) &&//BA (bFileHeader.bfType != 0x4943) &&//CI (bFileHeader.bfType != 0x5043) &&//CP (bFileHeader.bfType != 0x4349) &&//IC (bFileHeader.bfType != 0x5450)) {//PT cout << "Can't read this BMP file." << endl; cout << "bfType: " << bFileHeader.bfType << endl; bmpFile.close(); return -1; } //Read size of info header to determine which struct to use unsigned int headerSize; bmpFile.read((char*)&headerSize, 4); bmpFile.seekg((int)bmpFile.tellg() - 4); BITMAPINFOHEADER bHeader; memset(&bHeader, 0, sizeof(bHeader)); if (headerSize == 12) { bmpFile.read((char*)&bHeader, 12); } else if (headerSize == 40) { bmpFile.read((char*)&bHeader, 40); memcpy(&bHeader, &bHeader, 12); } else if (headerSize == 108) { BITMAPV4HEADER bHeaderExt; bmpFile.read((char*)&bHeaderExt, 108); memcpy(&bHeader, &bHeaderExt, 40); } else if (headerSize == 124) { BITMAPV5HEADER bHeaderExt; bmpFile.read((char*)&bHeaderExt, 124); memcpy(&bHeader, &bHeaderExt, 40); } else { cout << "Header unsupported. Length " << headerSize << endl; bmpFile.close(); return EXIT_FAILURE; } //Check for unsupported features if (bHeader.biPlanes != 1) { cout << "Unsupported number of planes ("<< bHeader.biPlanes << ")" << endl; bmpFile.close(); return EXIT_FAILURE; } if (bHeader.biBitCount != 24) { cout << "Unsupported number of bits per pixel (" << bHeader.biBitCount << ")" << endl; bmpFile.close(); return EXIT_FAILURE; } if (bHeader.biCompression != BI_RGB) {//BI_RGB means uncompressed cout << "Compressed image formats not supported." << endl; bmpFile.close(); return EXIT_FAILURE; } //Rows are rounded to 4 bytes //Calculate how many bytes to jump at the end of a row unsigned int requiredRowBytes = bHeader.biWidth * 3; int paddedBytes = (4 - (requiredRowBytes % 4)) % 4; unsigned int actualRowBytes = requiredRowBytes + paddedBytes; //Read the pixel data and close the BMP file unsigned int bytesToRead = actualRowBytes * bHeader.biHeight; char* pixelData = new char[bytesToRead]; bmpFile.seekg(bFileHeader.bfOffBits); bmpFile.read(pixelData, bytesToRead); bmpFile.close(); //Open output HTML file fstream htmlFile; htmlFile.open(htmlFileName, fstream::out | fstream::trunc); if (!htmlFile.is_open()) { cout << "Error opening output HTML file " << htmlFileName << endl; return EXIT_FAILURE; } //Write the HTML file and parse the colors simultaneously char htmlTableStart[] = "\n\n\n\n\n\n"; htmlFile.write(htmlTableStart, strlen(htmlTableStart)); for (int row = 0; row < bHeader.biHeight; ++row) { char htmlRowStart[] = "\n"; htmlFile.write(htmlRowStart, strlen(htmlRowStart)); unsigned int rowOffset = (bHeader.biHeight - row - 1) * actualRowBytes; for (int col = 0; col < bHeader.biWidth; ++col) { char htmlCellStart[] = "\n"; htmlFile.write(htmlCellEnd, strlen(htmlCellEnd)); } char htmlRowEnd[] = "\n"; htmlFile.write(htmlRowEnd, strlen(htmlRowEnd)); } delete[] pixelData; char htmlTableEnd[] = "

= 0; --z) { int color = 0;//must be int for _itoa_s() ((char*)&color)[0] = pixelData[rowOffset + colOffset + z]; char hexcode[3]; memset(hexcode, 0, sizeof(hexcode)); _itoa_s(color, hexcode, sizeof(hexcode), 16); //if hexcode is 1 char long, need to write a 0 too if (hexcode[1] == 0) { hexcode[1] = hexcode[0]; hexcode[0] = '0'; } htmlFile.write(hexcode, 2); } char htmlCellEnd[] = "\">

\n\n\n"; htmlFile.write(htmlTableEnd, strlen(htmlTableEnd)); htmlFile.close(); return EXIT_SUCCESS; }