I finally worked it out. Ouf. I had to create a ImageFactoryLoader and a Loader to create my initial Image from the context. After reading the code I conclude that we can't avoid creating the Loader and LoaderFacotry.
If you look at the code of PipelineFactory.determineCandidatePipelines(ImageInfo imageInfo, ImageFlavor targetFlavor) you can see the call to registry.getImageLoaderFactories(imageInfo, targetFlavor) and there, surprise : to find a pipeline you first need to get a compatible LoaderFactory (it seems finally logic as we need an initial image so we can convert it). So now I'm at the state where everything works (the fop part and my extensions) and now hope that fops implementation of Graphics2D is compatible with Jfreechart. At the moment drawing basic forms to the Graphis2D works and it gets displayed into the pdf, however I have still some problems when I'm drawing with Jfreechart (but I suppose it's my fault and hope so). When I'll have something clean and working well I'll share it so other can benefit of that work. Thanks for your help. Eugen Jeremias Maerki-2 wrote: > > On 05.01.2011 16:25:20 gen1986 wrote: >> >> Hi Chris, >> >> > Did you add the >> > file named "org.apache.xmlgraphics.image.loader.spi.ImageConverter" to >> > the JAR containing your code in META-INF\services sub directory as >> > suggested by Jeremias? >> >> Yep (you can see it in the attachment). > > the attachment seems to be missing. > >> I have created a ImageChartPreloader to preload the ImageInfo from >> DOMSource. >> What I can see is that the originalURI is null. > > Yeah, looks like I gave bad advice here, that the Preloader isn't > necessary. Obviously, it is. > >> 1) Should I do something at some place to specifiy that uri? (where, >> how...) > > No, no URI is involved when fo:insteam-foreign-object is used. > >> 2) However even if the originalURI is null as I can get all the infos >> from >> the source it's ok. >> But what MimeType should I give to the created ImageInfo? (I've tried >> some, >> but I always get the same error : no suitable loader/converter >> combination...etc) > > I've used "application/x-barcode4j+xml" for Barcode4J. Create another > custom one with "application/x-[something]+xml". > >> 3) I've tried to solve my problem with the preloader, but if it's not the >> right way for doing it (ex: maybe >> setting some attributes to the Document is?) tell me. > > I think the important thing is to support a DOMSource in the preloader > for your case. Again, take Barcode4J as a template. > >> 4) Please take à look at the attachment, so you can tell me what is >> missing. > > It didn't make it to the list. Try putting everything in a ZIP. > >> >> >> Eugen >> >> >> cbowditch wrote: >> > >> > On 05/01/2011 10:52, gen1986 wrote: >> > >> > Hello, >> >> Stepan and Eric thanks for the suggestions but the whole thing must be >> >> done >> >> in java (the charting is only a part of the app). >> >> Jeremias solution is close to what I must do. >> >> >> >> After following the explanations of Jeremias and reading the sources >> of >> >> Barcode4J, etc. I manage to get something out, but it still doesn't >> work >> >> and >> >> I'm not sure about some points. >> >> >> >> 1) I don't have to call imageManager.convertImage(image, flavors) >> right ? >> >> It's the fop framework who will do that. However if it's true, >> something >> >> is >> >> going wrong because my converters are not executed. >> > >> > Right, the Image Loader framework takes care of that. Did you add the >> > file named "org.apache.xmlgraphics.image.loader.spi.ImageConverter" to >> > the JAR containing your code in META-INF\services sub directory as >> > suggested by Jeremias? This is needed in order for the Image Loader >> > Framework to be made aware of your converter. >> >> 2) When I'm running the transformation I've got an error >> >> GRAVE: Image not available. URI: (instream-object). Reason: >> >> org.apache.xmlgraphics.image.loader.ImageException: The file format is >> >> not >> >> supported. No ImagePreloader found for null (No context info >> available). >> >> >> >> After googling a bit I've found that we have to add the following line >> to >> >> the fop conf :<prefer-renderer>true</prefer-renderer> >> > That is not the correct solution. The prefer-renderer option forces use >> > of the older renderers. The old Renderers don't benefit from the latest >> > bug fixes and improvements that have been made to the painters. >> > >> >> If I'm doing so I've got another error : No handler defined for my >> >> namespace... >> >> >> >> So instead asking a lot of questions I've uploaded a basic test >> project >> >> so >> >> you can see what I'm doing wrong. >> >> http://old.nabble.com/file/p30594894/Fop-ChartExtension.rar >> >> Fop-ChartExtension.rar >> >> >> >> Thanks for your help! >> > >> > Thanks, >> > >> > Chris >> > >> >> Eugen >> >> >> >> >> >> >> > <snip/> >> > >> > --------------------------------------------------------------------- >> > To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org >> > For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org >> > >> > >> > >> >> -- >> View this message in context: >> http://old.nabble.com/how-to-extend-the-rendering-part-of-fop-tp30579066p30597037.html >> Sent from the FOP - Users mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org >> For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org >> > > > > > Jeremias Maerki > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org > For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org > > > -- View this message in context: http://old.nabble.com/how-to-extend-the-rendering-part-of-fop-tp30579066p30605104.html Sent from the FOP - Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org
