Hi, Please find attached a first patch to add WebGL support for WebKitDFB.
The patch should compile for both pure DirectFB and cairo-dfb versions for targets supporting Open GL ES 2.0 on top of IDirectFBGL. It has however been tested only on Intel CE. Note to Intel CE SDK users: It actually runs on a slightly modified IDirectFBGL implementation (by default, the IDirectFBGL context is bound to the Open GL ES 1.1 Api, as stated here http://old.nabble.com/Re%3A-IDirectFBGL---what-are-the-use-cases--p28736 159.html). I won't post a patch here, but the modification is really straightforward. Regarding the implementation itself, I am not completely satisfied, but as a proof-of-concept, it works. Let me explain: In WebKit, the WebGL canvas can be rendered using two paths: - the software path copies the 3D content to an image buffer that is later composited with the backing store - the hardware path renders directly the 3D content to a native surface that is composited with the backing store. My understanding today is that following the hardware path in a clean way would require enabling the ACCELERATED_COMPOSITING for the whole WebKitDFB, which would be nice, but not that easy. On the other hand, following the software path leads to poor performances, as once the 3D rendering has been done, it takes two more blits to have it on screen (through a pixman buffer if you use cairo-dfb !). So, I decided to go for a compromise: I use the software path, but I modified the code initializing the image buffer so that it actually wraps a directfb surface used as a 3D offscreen buffer (thus it only requires a single blit betwen two directfb surfaces to have it on screen). The following WebGL samples work without any modification: http://learningwebgl.com/lessons/lesson04 http://learningwebgl.com/lessons/lesson05 http://learningwebgl.com/lessons/lesson06 http://learningwebgl.com/lessons/lesson09 I experienced crashes with the other examples, but I managed to have some of them run with little modifications around float precision and texture loading (I will investigate more on this). Not tested: - dynamically resize canvas - display multiple canvas on the same page. Cheers David Corvoysier France Telecom / Orange Labs <<WebKitDFB-WebGL.bz2>>
WebKitDFB-WebGL.bz2
Description: WebKitDFB-WebGL.bz2
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