Q: I've been playing with transparency in our program. Is the PDF
transparency equally supported in bother e_BuiltIn and e_GDIPlus
rasterizer?
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A: The complete support for PDF transparency is available only in the
cross-platform (i.e. 'built-in') rasterizer. Because GDI/GDI+ graphics
model is not fully compatible with PDF, it is not possible to
implement the complete support for PDF transparency using GDI/GDI+.
To be more precise, it is possible to implement such a rasterizer,
however it would eventually be reduced to 'built-in' rasterizer and
all advantages of the current GDI+ rasterizer (vector output, EMF/WMF
output, etc) would vanish.