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);
	}
}

Code sample for handling large volume output

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