[cairo] how to add some pdf optional content group in cairo
gisyangli at gmail.com
Wed Jan 30 20:43:39 PST 2013
I now use cairolib to succesful create a pdf file with different vector
graphics , I search the cairolib and found no fucntion about the "Optional
Content Group" in pdf file, I want to create layers in pdf file.
So how to realize the optional group content basing the cairo lib? Is there
any material for reference?
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