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Code sample for handling large volume output
If several hundred pages need to be converted into a single PDF output, the
straightforward workflow may need more system resources than available. To reduce
the system resource needs, input data should be grouped into smaller chunks for
processing, and append the processed chunks to the output. The input data can be any
single or multi-page image file, or a set of files.
Output type
Output file type
Recommended processing size
Direct TXT output
DTXT_PDFIOT and DTXT_IOTPDF_MRC
5 to 10 pages
Layout retention output (Formatted output)
PDF, PDFEdited, PDFImageOnText, and PDFImageSubst
50 to 100 pages
RecSetOutputFormat(sid, L"Converters.Text.PDFImageOnText");
// set Converters.Text.PDFImageOnText.AppendFrom to the output file name
kRecSettingGetHandle(NULL, "Converters.Text.PDFImageOnText.AppendFrom", &hset, NULL);
kRecSettingSetUString(sid, hset, outpdf);
for (int i=0; i<pages; i++) {
int ind = i % PACK; // cache index
if (ind == 0)
RecCreateDoc(sid, L"", &hDoc, DOC_NORMAL);
kRecLoadImg(sid, hFile, &hPages[ind], i);
kRecPreprocessImg(sid, hPages[ind]);
kRecRecognize(sid, hPages[ind], NULL);
RecInsertPage(sid, hDoc, hPages[ind], -1);
if (ind+1 == PACK || i+1 == pages) { // append cached pages
RecConvert2Doc(sid, hDoc, outpdf);
RecCloseDoc(sid, hDoc);
}
}
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