Conversation with #inferno at Fri Apr  4 21:08:48 2014 on powerman@chat.freenode.net (irc)
(21:08:48) #inferno: Topic for #inferno set by mennis at 17:30:16 on 12/28/09
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(22:53:58) yshurik: hi all
(22:56:24) leetspete1: Hello!
(22:56:59) yshurik: how are you?
(22:58:17) leetspete1: Not bad, business as usual.  How about you?
(22:59:35) yshurik: well, I am stuck with inferno drawing system
(23:00:02) leetspete1: How's that?
(23:01:26) yshurik: I am bypassing framebuffer with attachscreen() but drawing system does not want to paint there for some reason
(23:02:10) leetspete1: I think there's some queue you've got to pump; you're doing that?
(23:03:02) yshurik: hmm, no idea
(23:03:12) yshurik: what are you talking about?
(23:03:54) leetspete1: You're calling attachscreen in the C, right?
(23:04:07) yshurik: sure, that's about inferno-rpi
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(23:05:59) leetspete1: Trying to find it...
(23:07:41) leetspete1: Ah, have you checked flushmemscreen?
(23:08:16) yshurik: it is empty in my implementation, as I understand becase I am bypassing direct address to fb
(23:08:33) yshurik: if I have to flush, then it is not clear from where?
(23:09:14) leetspete1: That's (I *think*) where the OS indicates to the driver that it wants a refresh.
(23:09:22) leetspete1: But I was getting these events somewhat infrequently.
(23:09:51) leetspete1: And sometimes with parameters that didn't make sense.
(23:10:18) yshurik: ok, but what should be flushed as source? (destination is clear - fb)
(23:10:19) leetspete1: What are you setting for softscreen?
(23:10:49) yshurik: just 0
(23:11:00) leetspete1: Then that should be fine, I think...
(23:12:09) leetspete1: Hm...I set softscreen to 0, but I'm using buffering.
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(23:34:13) yshurik: ok, interesting, no more ideas?
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(00:47:41) leetspete1: yshurik: Well, I just have that function *almost* empty, but I pump a queue.
(00:48:11) yshurik: what is the pump code?
(00:49:19) leetspete1: The queue just gets emptied and I have it do a manual refresh of the whole screen every 15ms, because I couldn't figure out how this stuff works. Unless setting *softscreen=1 makes the code call the flush function more reliably.
(00:49:58) leetspete1: yshurik: It's an internal queue; I had patterned it sort of on the X driver.
(00:50:17) leetspete1: yshurik: https://bitbucket.org/1337p337/inferno-os/src/c8aff1ce1dd070ca8a37ae7659f2852d6770b1f4/emu/port/win-sdl.c?at=default
(00:51:16) leetspete1: It includes my notes where I speculate on what stuff does, but I haven't touched it in ≈1 year.
(00:52:28) leetspete1: There's quopen(), qlen(), qread(), and qproduce(), and those are the basics.
(00:52:58) leetspete1: It's basically chans at the C level.
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(22:06:36) yshurik: hi all, what's up?
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