Hi all,

i have this method exported in my dll which writes a bitmap down to disk. But
now i want to avoid writing to disk and instead give back an byte array with
this bitmap to improove performance. but i don't really see, how i could handle this.. So here comes the method from
C++:

BITMAPINFOHEADER bmpInfoHeader = {0}; // Set the size bmpInfoHeader.biSize = sizeof(BITMAPINFOHEADER); // Bit count bmpInfoHeader.biBitCount = wBitsPerPixel; // Use all colors bmpInfoHeader.biClrImportant = 0; // Use as many colors according to bits per pixel bmpInfoHeader.biClrUsed = 0; // Store as un Compressed bmpInfoHeader.biCompression = BI_RGB; // Set the height in pixels bmpInfoHeader.biHeight = lHeight; // Width of the Image in pixels bmpInfoHeader.biWidth = lWidth; // Default number of planes bmpInfoHeader.biPlanes = 1; // Calculate the image size in bytes bmpInfoHeader.biSizeImage = lWidth* lHeight * (wBitsPerPixel/8);

BITMAPFILEHEADER Bfh = {0}; // This value should be values of BM letters i.e 0×4D42 // 0×4D = M 0×42 = B storing in reverse order to match with endian Bfh.bfType = 0x4D42; /* or Bfh.bfType = 'B'+('M' << 8); // <<8 used to shift 'M' to end */ // Offset to the RGBQUAD Bfh.bfOffBits = sizeof(BITMAPINFOHEADER) + sizeof(BITMAPFILEHEADER); // Total size of image including size of headers Bfh.bfSize = Bfh.bfOffBits + bmpInfoHeader.biSizeImage; // Create the file in disk to write HANDLE hFile = CreateFile("Image001.bmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

if(!hFile ) { cerr << "Unable to save image to file " << endl; ... return; }

DWORD dwWritten = 0; // Write the File header WriteFile(hFile, &Bfh, sizeof(Bfh), &dwWritten, NULL); // Write the bitmap info header WriteFile( hFile, &bmpInfoHeader, sizeof(bmpInfoHeader), &dwWritten, NULL ); // Write the RGB Data WriteFile( hFile, pBitmapBits, bmpInfoHeader.biSizeImage, &dwWritten, NULL
); // Close the file handle CloseHandle( hFile );

Any suggestions?

Thanks in advance.

Regards JannJimm

Mit freundlichen Grüßen / Kind regards

Jann Schneider

IT - Development

SSI Schäfer Noell GmbH i_Park Klingholz 18/19 D-97232 Giebelstadt

phone +49 / (0) 9334 / 979 - 192 fax +49 / (0) 9334 / 979 - 100 eMail j.sc...@ssi-schaefer-noell.com Internet www.ssi-schaefer-noell.com

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