Thank you - works fine now - there is still a small difference in the Alpha value - but I guess this is because of transforming the 0-255 value to 0-100% value in PPT - right ?
That´s correct - when using the debugger - after setting e.g. 109 as alpha with ShadowColor, a value of 108 is stored (but to be honest I don´t really care).
When testing the new slides I found another problem with shadows:
This problem concerns the smoothing of shadows:
my client has a CI defining the format of shadows (also includes the smoothing)
so I took a ppt "template" (attached as org.ppt) with the correct "smoothing definition"
loaded it to aspose.slides : Presentation pres1 = new Presentation (@"org.ppt");
and immediately stored it:
pres1.Write (@"asposemod.ppt");
the effect is that the smoothing-value ist set to 0 - which ist not nice because I expected Aspose not to modify existing definition ?
Presentations in PPT format created in PowerPoint 2003 and below don’t support shadow smoothing. PowerPoint 2007 uses special extension for that which doesn’t belong to ppt specification and not compatible with previous PowerPoint versions.