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[directfb-dev] Re: possible directfb bug
On Wed, 12 Jun 2002, Denis Oliver Kropp wrote: <snip> > df_dok uses the same surface for blit and stretch-blit (melted.png). yes it does, i looked at blit_colorkey for some stupid reason. well it doesn't seem to happen with df_dok then. is this because the source surface is not being written to (since melted.png is only rendered at the start) ? <snip> > The alternating would happen if software writes to a surface and blits from it > using hardware afterwards. This is a common case for displaying videos. yes i noticed the problems while displaying videos. i will clarify my problem again. when i display a video with software stretchblit it is fine and let's call this speed speed1. i then change the software stretchblit to a hardware blit and this i also fine. now when i change back to a software stretchblit it gets played back at speed2. now the problem is that speed2 is much slower than speed1. so what i am feeling is that something is not being reset properly as a stretchblit is capable of speed1 but for some reason it can't after swithing from a hardware blit. in both cases the software is writing to a surface and then blitting using hardware and software. there is no reason why stretchblit should have different performance from the first time and the second time. this is why i think there is a bug somewhere. i don't know if u misunderstood my problem or i misunderstood your reply but i think we are talking about different issues here. > > my current work around is to create 2 surfaces, one for blit and one for > > stretchblit. > > If you are not blitting/drawing/writing TO these surfaces at any time > the problem shouldn't occur. yes, that's how i have done it and they don't occur. cheers, alex -- Info: To unsubscribe send a mail to firstname.lastname@example.org with "unsubscribe directfb-dev" as subject.