2010/12/14 Thiago Macieira <thi...@kde.org>: > On Tuesday, 14 de December de 2010 07:27:47 Benoit Jacob wrote: >> Hi, >> >> I would like to know if the KDE or Qt community has plans for a free >> OpenGL-based equivalent to Direct2D (see explanation below)? And if >> there is a chance that I could get you interested in that. We at >> Mozilla are very interested in that and are considering the >> possibility of launching such a project: >> >> https://wiki.mozilla.org/Gecko:2DGraphicsThoughts >> >> It would be interesting for us to know your opinions on the subject. > > Have you looked into OpenVG? That's a 2D vector HW-accelerated API.
We target every OpenGL ES 2 device. I am not aware of an OpenVG implementation that will run (and be well hardware-accelerated) everywhere there is a OpenGL ES 2 implemetation? >> First of all, by "2D", I mean "advanced 2D", with text etc. So please >> don't close this thread by saying that 2D is a special case of 3D >> hence OpenGL is all I need ;-) > > Yet it is... Qt has no interest in anything that is not OpenGL ES 2.0 (or > compatible with it). Neither has Mozilla :-) By OpenGL I really meant both OpenGL 2.1 and OpenGL ES 2.0. We support cell phones. > >> Microsoft has an answer to this problem: Direct2D. If we want to cover >> advanced 2D needs with hardware acceleration on non-Windows platforms, >> we need something like Direct2D, but based on OpenGL. For example, if >> you ever want to get a world-class fully Qt-based Web browser *with* >> GPU-accelerated rendering, you'll need something like that. Ditto for >> compex enough 2D games (a scene graph API can only be enough for >> simple games), for Calligra... > > Can you explain how OpenGL ES 2.0 cannot achieve the same results? OpenGL ES 2.0 totally can --- for the low-level layer that talks to the GPU. That's what we want to use. What I'm looking for is a higher-level library, that implements 2D primitives on top of that. Just like Direct2D builds on top of Direct3D 10. > What's > missing from the OpenGL API that Direct2D provides? All the 2D stuff, e.g. look at all what QPainter provides that would be lots of work to do with bare OpenGL. > What are the HW- > accelerated primitives we should get access to in order to get better > performance? OpenGL ES 2.0 has enough stuff (afaics). Benoit > > -- > Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org > Senior Product Manager - Nokia, Qt Development Frameworks > PGP/GPG: 0x6EF45358; fingerprint: > E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 > >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<
