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POIs there a lightweight way to include GDI rendered content when printing with WPF?
 

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    <p>One of the projects I work on has some pre-existing reports that are printed via MFC's printing support and rendered more or less directly to a printer DC via GDI. We've started doing some new (unrelated) reports via WPF/XAML since we're transitioning new UI to WPF anyway and it's so much better to work with for layout.</p> <p>The other shoe has finally dropped, and I've got the need to add some new functionality to an existing printed report, and the new functionality practically begs to be implemented with WPF. Our existing WPF reports are implemented via XAML pages sent to an XpsDocument (in-memory, not on disk) via XpsDocumentWriter. I would like to be able to continue to use this strategy, and take the approach of writing WPF/XAML reports that happen to have some pages rendered via GDI.</p> <p>My first naive attempt was to embed an HwndHost in the UIElement that gets rendered in the XpsDocumentWriter, but that doesn't seem to work. No surprise but it was worth a try.</p> <p>The next obvious solution, IMO, would be to render the GDI graphics to an appropriate sized and scaled bitmap, and render that bitmap to a page in the XpsDocument. That would work, but page-sized bitmaps (especially in-memory ones) seem like a recipe for high memory usage and poor performance on slower computers.</p> <p>Ideally I'd like to render the GDI content to a metafile or some other vector format that could then be translated to XPS. But this has to be an automatic process that works every time since it's just a document printing feature. OTOH it's an application for in-house users so we can put up with <em>some</em> performance degredation</p> <p>WPF development is not my main task, so I'd describe myself as a novice without much detailed knowledge of the underlying details. I just wanted to make sure I'm not missing something obvious before I revert to using a bitmap as the transfer medium, although I haven't turned up any other decent options in my search so far.</p> <p>Anything I should be looking into?</p>
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