How can I have Java CEF render to my in memory byte buffer?

[philip142au]

Hi there,

I am new to Java Chromium Embedded, I wish to have it render just to a ByteBuffer and I will do further processing of that data and my own rendering of that data to the screen.

Can someone tell me how I can make this happen?

Best regards, Philip

[magreenblatt]

JCEF does not support this currently without modifications. See https://code.google.com/p/javachromiume ... tail?id=77.

[philip142au]

Hi Magreen,

Ok so I'll modify it, what is the reasons why it is like this and not exposing the ByteBuffer data? I mean, can you think of a logical reason why?

Thanks, Philip

[magreenblatt]

It wasn't considered during the recent refactoring. Patches to restore access to CefRenderHandler are welcome.

[philip142au]

I want to integrate with JMonkeyEngine game engine to display the images, so I need to refactor I guess as I also want to do some image processing.

[endy219]

me too.
I want crawl web data by chromium headless，just get the render data.
How can I do this with jcef?

[philip142au]

Even JMonkeyEngine wants to integrate with JavaCEF http://hub.jmonkeyengine.org/soc/2014-ideas/ "“The Chromium Embedded Framework (CEF) is a simple framework for embedding Chromium-based browsers in other applications.” There are many uses for an embedded browser inside of a game, such as news updates and store frontends (see Valve’s DOTA2 for instance)."

Is it hard to do?

[philip142au]

Hi there,

I made some progress today splitting Java Cef render handling into three parts, AWT, OpenGL (these two already existed) and ByteBuffer (new). The AWT and OpenGL were not so cleanly separated conceptually.

So in my code base it can render to a ByteBuffer without a window displaying on the screen, BUT its not headless, the application still has to run as a JFrame. No Window is created to show on the screen and no image is displayed on the screen which is close to what I want, but it seems like some C++ code needs my application to be a JFrame as when I switch it to just be a Java main it crashes.

So its nearly headless, it renders to a ByteBuffer and no window is shown on the screen. Can anyone suggest why its not happen to me to get rid of the JFrame?

I'll place my code in git when I clean it up a little.

Philip

[philip142au]

Hi there,

Ok so the changes for Java Chromium Embedded to render to a ByteBuffer are here. This could be useful for anyone who wants to integrate JavaCEF into a game engine.
https://github.com/PhilAndrew/JavaChrom ... ByteBuffer

Based on r94 of Java Chromium Embedded (latest version as of today) https://code.google.com/p/javachromiume ... etail?r=94

See here for the ByteBuffer example https://github.com/PhilAndrew/JavaChrom ... dless.java

Philip