BMP MERGER -- A Reusable Class to Merge BMP files, Load a Bitmap from a BMP File, and Display HBITMAP without Flicker

Environment: Windows 2000 SP2, VC6 SP3
  1. MFC is NOT needed.
  2. A HBITMAP is created from a group of BMP files and the final palette is also returned if needed.
  3. Loads a bitmap from a BMP file; the corresponding palette is also returned.
  4. Displays a bitmap to the given DC without flicker at the given starting point.
  5. Three types of styles can be applied while merging bitmaps. See the images.
    • HORIZONTAL_TILE—This is the default. Aligns all bitmaps horizontally.
    • VERTICAL_TILE—Aligns all bitmaps vertically.
    • MATRIX_TILE—Aligns bitmaps in a matrix style. Gaps are filled with the given background color.
  6. The corresponding palette is also returned if needed; otherwise, it passes NULL if the palette is not needed.
  7. If there are any gaps after merging, they will be filled with the given background color. The default color is BLACK.

To see how the demo works, click the Horizontal, Vertical, and Matrix toolbar buttons. See the following sample source code.

void CBmpLoaderView::OnDraw(CDC* pDC)
{
  CBmpLoaderDoc* pDoc = GetDocument();
  ASSERT_VALID(pDoc);

  CBitmapMerger BmpMerger;
  int width=0, height=0;
  HPALETTE hPal = NULL;
  HBITMAP hCombBmp = NULL;
  LPCTSTR aFiles[5] = {"Bmp1.bmp", "Bmp2.bmp",
    "Bmp3.bmp", "Bmp4.bmp", "Bmp5.bmp"};
  hCombBmp = BmpMerger.CombineBitmaps(aFiles, 5, &width, &height,
             &hPal, RGB(128,128, 128), g_mode);

  //>> hCombBmp = comb.LoadBitmapFromFile("Bmp4.bmp");

  BmpMerger.DisplayBmp(pDC->GetSafeHdc(), hCombBmp, hPal, 5, 5);

  DeleteObject( hPal );
  DeleteObject( hCombBmp );
}

Downloads

Download demo project - 288 Kb
Download source - 13 Kb


Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Organizations are increasingly gravitating toward mobile-first application development as they assess the need to revamp their application portfolios to support touch computing and mobility. Consumerization has brought higher expectations for application usability along with the mobile devices themselves. Enterprises are increasingly shifting their new application acquisitions and development efforts toward mobile platforms. With this backdrop, it is natural to expect application platform vendors to invest in …

  • Live Event Date: July 8, 2015 @ 2:00 p.m. ET / 11:00 a.m. PT With business driving the increasing adoption of agile methodologies such as Continuous Integration and Continuous Deployment, the need for agile database tooling has become even more important. In many companies, the database development lifecycle has become the bottleneck in an otherwise agile delivery process. As such, database professionals are under increasing pressure to shorten delivery timelines even further, only increasing the stakes …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date