Hello, unfortunatelly there is not too much docu out there about DRM, KMS and particulary about the architecture and interface to DRM and DRM for glamo.
I am not that much interested about the impl. details but about the interface DRM provides, in order to asses the effort to write a driver for directfb. Regards mobi phil On Tue, Sep 22, 2009 at 4:38 PM, Thomas White <t...@bitwiz.org.uk> wrote: > On Tue, 22 Sep 2009 01:14:08 +0200 > mobi phil <m...@mobiphil.com> wrote: > > > As directfb seems to be very fast on openmoko, I am intending to write a > few > > phone applications on top of it. I was thinking to write a directfb > driver > > for it. However looking at the code of libglamo (mplayer) and Xglamo I > see > > that not too many primitives are "accelerated". I see practically blit > and > > mpeg decoding. Is there a way to access things like draw triangle/line > etc? > > The 2D engine only knows about rectangles and lines, although it also does > anti-aliasing of text and gradient fills if that's any help to you. > Triangles > can be drawn via the 3D engine, but the overheads involved in programming > all > the necessary parameters (transformation matrices, shading parameters, etc) > might make it not worth the effort. But they might not, especially if > you're > clever about how you program it. > > > By the way links2 is superfast on directfb and fb, even without > acceleration > > for rendering. > > Indeed. While our bus to Glamo is slow, it's not *that* slow. This kind > of > thing is great for getting an idea of what the underlying "Glamo factor" > really is, at least as far as pure graphics performance is concerned. > > If you're interested in using Glamo's features, the DRM-enabled kernel > (branch > drm-tracking) should be of interest to you. All the command queue handling > and memory management is done for you with that, similar to libglamo but > with > the option of having multiple programs accessing the chip simultaneously. > Maybe that's not of any help in the DirectFB environment, but if it is then > let me know if I can be of any assistance. > > Tom > > -- > Thomas White <t...@bitwiz.org.uk> > > _______________________________________________ > devel mailing list > devel@lists.openmoko.org > https://lists.openmoko.org/mailman/listinfo/devel > -- rgrds, mobi phil being mobile, but including technology http://mobiphil.com
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