The following steps show how to loop through all pages of a multipage TIFF file and extract each page, process it individually, and save it into a separate file.
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
Determine the number of pages in the file:
L_FileInfo("MultiPage.tif", &FileInfo, sizeof(FILEINFO), FILEINFO_TOTALPAGES, NULL);
TotalPages = FileInfo.TotalPages;
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
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