A little background:
I have a project which takes images from an external system. They
arrive as JPEGs in memory from a socket stream (this isn't a straight
URL). Now what I'd like to do is provide an output port for that JPEG
image in a custom provider patch.
The patch works works, the JPEG frames are being read inline with the
calls to the plugin execution method but I need to get those frames
into QC itself (ie an image output port).
My "progress":
I've created a QCPlugInOutputImageProvider and I'm now attempting to
create the code to render into a memory buffer or to a CGLContext.
So far I've created an NSData with the in-memory JPEG, and now have a
CIImage. At a later date I wish to have the option of processing the
image data with CIFilters (not yet though).
The problem is that renderToBuffer: requires pixel output but I have a
CIImage which is effectively the compressed JPEG and I admit I'm
confused and lost where to start with all the image tools.
I know that CIImage is the input into a processing pipeline and then
the end result is rendered (just like VTK for example) and the only
way I can see this working is to render the CIImage into somewhere but
how?
My background in parallel systems (big data sets) makes me feel that
any intermediate buffer is not right and it should be possible to
render from one to the other form in one go. Is this possible?
Help! Any pointers, links, code fragments or names of classes to look
or advice to say I'm going in the right direction at would be
gratefully received.
Lost and rather confused,
Nick.
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