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[directfb-dev] Re: Flipping troubles - videolayer, crtc2
Hi, > On Tue, 2002-06-18 at 16:58, Jiri Svoboda wrote: > > Hi, > > > > > Thanks. I've tested it but I get only a green screen > > > (symptom of backbuffer not being flipped at all). > > > > Will check it. Is Your driver creating flipping surface as default? Even if not specified/layer not configured? > > > > > I think it's because when you test for the YV12 blit, and it is > > > true, > > > you set do_flipping=0. I think buggy YV12 blitting and > > > buffer flipping are two separate issues, and should be tested > > > separately. > > > > I set do_flipping on version basis - for 0.9.12 and above (same as > > blit). And it is connected to YV12 blit. If I set backbuffer into > > system memory flipping works only when bitblt is OK. So I enabled > > flipping for version 0.9.12 and above. BTW: flipping on > matrox BES is > > supoorted also from 0.9.12.... > > > > Because of bitblt bug flipping is not safe on 0.9.11 even if it is > > supported by dfb. > > Flipping from backvideo should not be affected by the blit > bug, only flipping from the backsystem. I guess you can use > a test similar to the > following: > > create/get DLBM_BACKVIDEO layer, then test for flipping > support by issuing a layer->Flip. I did not test it yet, but I think this will not work. Flip will be OK in all case, but nothing displayed for DLBM_BACKSYSTEM. I will solve this by disabling DLBM_BACKSYSTEM for dfb 0.9.11. JS -- Info: To unsubscribe send a mail to firstname.lastname@example.org with "unsubscribe directfb-dev" as subject.