On Thu, Jan 14, 2010 at 2:19 PM, Michael Qiu <fallwind@xxxxxxxxx> wrote: > Thanks a lot for you advise. > > Before I read the source code you mentioned, I guess I should write a > driver modules which provide /dev/dvb/adapter/audio, video, frontend, > ca...., and also provide a /dev/fbx for OSD layer. But in source > level, all display HW relative functions would probably in a same > module, because they are operation on same block of H/W. > But I still don't know where to put my global display control > interface, for instance, the function to control which layer open and > close, the alpha values used for each layer... Yes, in which case you will need a frame buffer to handle your global display. > And I investigated DirectFB, it seems if I provide a /dev/fb0 device > the DirectFB can play around it and it will the base for upper GUI > system. > I also found DirectFB support V4L as it's surface source. So it will > need some kernel module to control layer blending. It seems the thing > I am looking for which implement the global display control. Direct FB has it's own drivers, at a userspace level, http://directfb.org/index.php?path=Support%2FGraphics http://directfb.org/index.php?path=Support%2FMedia Directfb and linuxtv parted ways a long time back, where the original goal was to make a x86 based DVB STB at the parent organization at that time then Convergence. Regards, Manu -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
