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

Chris Hatko chatko at gmail.com
Thu Jan 20 10:39:24 PST 2011

I've found this challenging (wincairo port) especially when Flash is
displayed on a website, I've only been able to get it working by forcing
flash plugins into windowless mode. I've used the backingstore bitmap as the
source and just copy the contents to a buffer on every update.

Would be very nice to have the webkit separate from HWND, I wonder if QT
port does a good job of this?


On Thu, Jan 20, 2011 at 11:55 AM, Adam Roben <aroben at apple.com> wrote:

> 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.
> -Adam
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