Splitting a Multi-page TIFF File

The following steps show how to loop through all pages of a multi-page TIFF file and extract each page, process it individually, and save it into a separate file.

1.	Declare the following variables:

BITMAPHANDLE LeadBitmap = {0};  // LEAD bitmap
FILEINFO FileInfo = {0};   // File info
L_INT PageNumber, TotalPages;   // Page numbers
LOADFILEOPTION LoadFileOption = {0};  // Loading options
char szOutFileName[MAX_PATH];  // Output file name

2.	Determine the number of pages in the file:

L_FileInfo("MultiPage.tif", &FileInfo, sizeof(FILEINFO), FILEINFO_TOTALPAGES, NULL);
TotalPages = FileInfo.TotalPages;

3.	Loop through the pages of the file; performing specific processing on each page, then save each page to a separate file:

L_GetDefaultLoadFileOption(&LoadFileOption, sizeof(LOADFILEOPTION));
for (PageNumber=1; PageNumber<=TotalPages; ++PageNumber)
{
   // Load the next image in the loop
   LoadFileOption.PageNumber = PageNumber;
   L_LoadBitmap("MultiPage.tif", &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, &LoadFileOption, NULL);

   // Check that it is properly loaded and allocated
   if(LeadBitmap.Flags.Allocated)
   {
      // Perform specific processing on the page, such as flipping it
      L_FlipBitmap(&LeadBitmap);

      // Save the page to a separate file
      wsprintf(szOutFileName, "PageNumber%4.4d.tif", PageNumber);
      L_SaveBitmap(szOutFileName, &LeadBitmap, FILE_TIFLZW, LeadBitmap.BitsPerPixel, 0, NULL);

      // Free the image from memory
      L_FreeBitmap(&LeadBitmap);
   } //if Allocated
} //for loop