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Q:
When I open Output Preview in Acrobat, it lists the "Transparency Blending Color Space". Where is this value coming from, and how can I discover it in a PDF document using the PDFNet SDK?
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A:
This value is populated from a colorspace specified in a page's optional Group dictionary. It's possible to instantiate a ColorSpace object from this dictionary. For example:
Page page = //... Obj group = page.GetSDFObj().FindObj("Group"); if (group && group.IsDict()) { Obj cs_obj = group.FindObj("CS"); if (cs_obj) { ColorSpace cs(cs_obj); } }