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  • Your email address will not be published.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

  • Today's agile organizations pose operations teams with a tremendous challenge: to deploy new releases to production immediately after development and testing is completed. To ensure that applications are deployed successfully, an automatic and transparent process is required. We refer to this process as Zero Touch Deployment™. This white paper reviews two approaches to Zero Touch Deployment--a script-based solution and a release automation platform. The article discusses how each can solve the key …

  • Learn How A Global Entertainment Company Saw a 448% ROI Every business today uses software to manage systems, deliver products, and empower employees to do their jobs. But software inevitably breaks, and when it does, businesses lose money -- in the form of dissatisfied customers, missed SLAs or lost productivity. PagerDuty, an operations performance platform, solves this problem by helping operations engineers and developers more effectively manage and resolve incidents across a company's global operations. …

Most Popular Programming Stories

More for Developers

RSS Feeds