Monkeybread Software - DynaPDF Manual

DynaPDF Manual - Page 572

Function Reference

Page 572 of 821

Optimize() does not rebuild font subsets like CheckConformance(). The function is part of DynaPDF

Professional.

Usage

It is assumed that this function is called right before closing the PDF file. It is not allowed to call the

function twice for the same PDF file in memory.

After Optimize() was executed, close the file with CloseFile(), CloseFileEx(), or CloseAndSignFile()

for example.

If the flag ofInMemory is absent, then pages are directly written to the output file after optimization

to reduce the memory usage. If the PDF file was created in memory (this is the case if no ouput file

name was passed to CreateNewPDF()) then the output file must be opened with OpenOutputFile()

or OpenOutputFileEncrypted() beforehand. Note that it is not possible to sign the PDF file if the flag

ofInMemory is absent.

If the file should be signed too, then import the resulting PDF file again and sign it with

CloseAndSignFile() or CloseAndSignFileEx() for example.

Re-compressing 1 bit images with JBIG2

If the flag ofCompressWithJBIG2 is set, 1 bit images will be re-compressed with JBIG2 (if the image

was not already compressed with this filter). This can drastically reduce the file size since JBIG2

compression achieves much higher compression rates than any other 1 bit image filter that PDF

supports. The JBIG2 compression filter in DynaPDF is lossless, that means the original image quality

will be preserved.

Text to outline conversion

The function converts text to outlines if the flag ofConvTextToOutlines is set. The flattening algorithm

loads exactly the same fonts as the rendering engine would load and it scales fonts in the very same

way. What you see is what you get.

Outlines are scaled to a master size of 1000 units to achieve high quality output. It stores hinted

outlines with preserved curves. The resulting PDF files are much smaller in comparison to fully

flattened outlines and offer higher quality since curves stay smooth regardless of the zoom factor.

It is also possible to restrict the conversion to non-embedded fonts with the flag

ofConvNonEmbFontsOnly since these fonts are usually the problematic ones when printing on

Postscript devices.

Annotations and form fields are not affected by the conversion. In order to consider these objects too

it is possible to flatten all annotations and form fields before calling Optimize(). See FlattenAnnots()

for further information.

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