[webkit-help] rendering HTML to a bitmap (wincairo port)

Adam Roben aroben at apple.com
Thu Jan 20 08:55:27 PST 2011

On Jan 20, 2011, at 6:02 AM, Daan Nusman wrote:

> Hello everyone,
> Is it possible to use the WebKit(2) API to render directly to a memory bitmap or texture?
> I've already built the WinCairo port. It works nicely in a window (WinLauncher), very cool! However, I'd like to render to a fixed bitmap, without any window to embed WebKit in (somewhat like a console application). Is this possible without a huge effort?
> Options:
> - hack the COM object?
> - create a completely new platform layer/port?
> - am I completely missing a convenient WebKit2 API call? :)
> - modify/use the print functionality?
> [Some context: I would like to start using WebKit for creating reports, from inside our full-screen DirectX9-based simulator (Windows-based). It just works like any other DX9 full-screen game, and has its own UI toolkit. To integrate a simple static report, generated from HTML, into our UI, we need to render the HTML to a texture so we can use that to show the report. Nothing interactive required, and no networking required. I'm a newcomer to WebKit so any pointers are greatly appreciated.]

Both WebKit and WebKit2 are very reliant on having an actual HWND. The HWND is used to determine the size of the viewport, whether the page is focused, etc. I don't think there's an easy way to render content without an HWND currently. However, you can hide the HWND (either by moving it offscreen or never making it visible) and capture its contents using WM_PRINT.


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