Thanks, Andreas. The spec in that area is certainly not easy to follow, but I _think_ I have types 2 & 3 implemented. And perhaps I can/should revisit the tintTransform functionality ...
Daniel On Sat, Feb 27, 2010 at 6:31 AM, Andreas Lehmkuehler <[email protected]>wrote: > Hi, > > Daniel Wilson schrieb: > > The gradients I'm trying to implement for PDFBOX-615 are defined in part >> by >> functions. >> >> We are parsing the functions and instantiating derivatives of PDFunction >> ... >> but I can't find anything that evaluates the function. e.g. if I pass the >> function 2, what does it return? >> >> A quick grep didn't find any such examples ... in fact the only classes >> that >> contain an instance of PDFunction are PDDeviceN and PDSeparation, both of >> which return an empty function rather than returning the one that the >> class >> was loaded with. >> >> Is this a known gap in our support of functions? Does someone know where, >> in fact, we do use them? Or is this one of those things, no one's really >> sure about? >> > That is a known gap. Have a look at [1]. I thought that I understood how > these > functions work, but when I tried to implement e.g FunctionType2 I'd > realized > that I didn't. Obviously it is a little bit more tricky than I expected or > probably it is just my limited ability to understand complex english texts. > > Thanks! >> >> Daniel >> >> > BR > Andreas Lehmkühler > > [1] https://issues.apache.org/jira/browse/PDFBOX-519 >
