From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Simon Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (1.0) Message-Id: <9A3054B5-B852-4BDE-8D58-9DBE0BD93F89@quintile.net> Date: Sun, 29 May 2016 06:50:09 +0100 References: In-Reply-To: To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Subject: Re: [9fans] More about /dev/draw Topicbox-Message-UUID: 9520cfde-ead9-11e9-9d60-3106f5b1d025 I use the Pi 2 version daily at work with an hdmi monitor. there seem to be a couple of lurking bugs in the sub driver which generate spurious grumbles and seem to prevent sub serial adapters from working, which is a minor annoyance. Other than that it works like a ch= arm. audio out is still broken too which is a continuous source of guilt to me -=20= I will fix that one day. -Steve > On 29 May 2016, at 06:40, jfmxl wrote: >=20 > I see an image at bell labs for the raspberry pi. http://plan9.bell-labs.c= om/sources/contrib/miller/9pi.img.gz >=20 > I see that there are Raspberry Pi 2 Model Bs and Raspberry Pi 3 Model Bs f= or sale. Will either one work with that image? >=20 > I have a Samsung SyncMaster E1920 I could use, it's got an 'HDMI' connecti= on, I believe. Am I good to go? >=20 >=20 >=20 >> On 2016-05-29 00:34, Skip Tavakkolian wrote: >> a quick and easy way to get a local Plan 9 terminal is to use 9Pi >> (Plan 9 on Raspberry Pi). with Go 1.6 and later you can cross compile >> for plan9/arm. >> On Sat, May 28, 2016 at 10:24 AM Dave MacFarlane >> wrote: >>> Either I'm going insane, the default Plan 9 /dev/draw in-memory >>> implementation >>> doesn't implement draw(3), or possibly both. >>> When I do the following, it works as expected under both drawterm >>> and a locally mounted instance: >>> 1. Allocate a screen with an 'A' message >>> 2. Allocate an image on the screen of the same size as /dev/wctl >>> with a 'b' message >>> 3. Draw the image over the window with a 'd' message >>> 4. Flush the buffer with 'v' >>> When I do the following, it works under drawterm, but not with a >>> local /dev/draw implementation: >>> Steps 1-2 above >>> 3. Allocate another image of some arbitrary fill colour with 'b' >>> (with or without the repl bit) >>> 4a. (Optional, doesn't seem to make a difference) set the >>> compositing operator with 'O' >>> 4b. Draw the new image over a portion of the window image from step >>> 2 with 'd' >>> 5. Go to step 3-4 from the first variation. >>> (I don't have a 9front instance to test on.) >>> On the other hand, replacing a portion of the image from step 2 with >>> 'y' works under either. (I haven't gotten around to using 'Y' when >>> appropriate yet.) >>> Basically, I can only get any variation of this code: >> https://github.com/driusan/exp/blob/18a78a1549541d46d26cb6088a904585c386d= 812/shiny/driver/devdrawdriver/uploadimpl.go#L50 >>> to work under drawterm. >>> The end result is that under a local Plan 9 instance the basic >>> sample shiny test looks like this: >>> http://driusan.github.io/plan9/basicmem.png >>> Instead of this: >>> http://driusan.github.io/plan9/basicdrawterm.png >>> Does anyone have any pointers? I don't have much access to a >>> physical Plan 9 machine, so I'm having trouble debugging this since >>> it works under drawterm (or perhaps is buggy under drawterm in a way >>> that makes it seem like it's working..) >>> It would also potentially be helpful if someone who uses Go under >>> 9front could let me know how x/exp/shiny/examples/basic looks with >>> the shiny driver in that branch, but I'm not sure that it matters >>> since it'll most likely be the same as one of the above.. >>> - Dave >=20