Image processing using pass-thru function

rbuser

Hi

I have a pipeline that has a graphic field. I can view the original
image with a TppDBImage when hooked up with that field.

I also have a pass-thru function doProcessImage(pPicture: TPicture):
TPicture;

But I couldn't find a way to use this function in rap with a TppImage
object on the report. How can I assign the function result to the
TppImage object?

An one code line sample would be great.

Bora Aydemir
Delphi 2007 U3, RBuilder 12.01 Ent.

nicocizik

Hi Bora,

I believe this will need to be done in the pass thru as well. If you
are simply altering the TPicture, why do you need to return anything?
If you send a reference to the TPicture property of a TppImage
component, simply alter it in your pass thru and the changes should be
reflected when you run the report.

If you are insistent on assigning a new TPicture to the TppImage
component, you will need to do so in the pass thru (or another pass thru).

ppImage1.Picture.Assign(Picture);


Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hi,

Sounds like a good idea, I'll give it a try. My only problem is how can
I can send the graphic data from the pipeline to an existing pass-thru
function that takes a tpicture as a parameter in rap code? Likewise how
can I assign the graphic data from the pipeline to a TppImage object in Rap?

Best Regards

Bora Aydemir

25/03/2011 18:43, Nico Cizik (Digital Metaphors) yazmis:

nicocizik

Hi Bora,

If you are using a TppDBImage you could send that TPicture as the data.
Or an easier route would be to simply send no parameter, and access
the datapipeline directly from the pass-thru function. This way you
will have full access to all the DBPipeline's functionality. Then, once
you process the data, reassign the TPicture object to the TppImage in
the pass-thru as well.


Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com