Hi Venkat,
I advise you to just pass the bare values in AFPPageOverlayElement from
attlist.getValue(ATT_X) and attlist.getValue(ATT_Y) through to the
AFPPageOverlay and remove the use of AFPPaintingState and
AFPUnitConverter in there - this was never the correct place to do
this. You could look at calling upon AFPUnitConverter to carry out the
correct plotting calculation on your AFPPaintingState instance member
variable in DataStream.createIncludePageOverlay(String name, int x, int
y). This would mean regardless of whether FOP is using the
AFPDocumentHandler or the AFPRenderer implementation, the calculation
will still be done correctly and at the right time. Hope this helps you
with the fix.
Adrian.
Venkat Reddy wrote:
Hi Adrian,
Thanks for your reply.
Yes, You are absolutely right, I am trying to handle these conversions
at the renderer level... I will soon come out with a patch to the bug
you opened.
Thanks once again for the source points,
Venkat.
Adrian Cumiskey wrote:
Hi Venkat,
This approach is not a good idea. It is possible that a runtime
environment is configured to have multiple instances of Fop being
instantiated by FopFactory with different rendering configurations
(e.g. renderer resolution values).
Its disappointing, but I've just noticed a bug in
AFPPageOverlayElement, an AFPPaintingState shouldn't just be
instantiated in there like that. The processNode implementation will
not accurately calculate and plot the page overlay position if the
document resolution is different from the detault value of 240dpi.
This calculation should be carried out much later at rendering time,
*not* in here at configuration time - its very hacky and you'll need
to refactor this. I seem to remember that Chris worked on this new
feature so you may want to converse with him about its implementation.
Adrian.
Venkat Reddy wrote:
Hi,
AFPPaintingState is being used in three different places altogether
in FopTrunk source. The default constructor is being used in the
following three classes...
1. AFPDocumentHandler.java
2. AFPRenderer.java
3. AFPPageOverlayElement.java
There is a variable 'resolution' is being initialized for each
instance, this resolution parameter can be set using the 'fop.xconf'
for a particular render...
Ex:- AFPRenderer configuration below
<renderer mime="application/x-afp">
<!--
The bit depth and type of images produced
(this is the default setting)
-->
<images mode="b+w" bits-per-pixel="8"/>
<renderer-resolution>1400</renderer-resolution>
The above <renderer-resolution> is being hardcoded as '240dpi' in
AFPRendererConfigurator.java, which initiates the renderer
resolution based on the configuration set in 'fop.xconf'. In order
to resolve this problem, I will be changing the AFPPaintingState as
singleton, so that all the above classes will get the instance using
'getInstance()' method instead of default constructor. This will
resolve the <renderer-resolution> problem as well, by a simple
change in AFPRendererConfigurator (instead of hardcoded value 240,
assigning the value from the configuration object).
Please review the above changes and tell me, if I am doing anything
wrong here?
Thanks,
Venkat.
