There is a PR open with Plan 9 devdraw support to 9fans.net/go/draw: https://github.com/9fans/go/pull/28

It at least works with the Go acme port Edwood last I tested.

On Sat, Apr 4, 2020 at 4:33 PM Jeremy Jackins <jeremyjackins@gmail.com> wrote:

Well, you need a Go draw package in place of the C library. There is a
draw package in github.com/9fans/go/ but unfortunately I think it only
supports plan9port devdraw, rather than the native Plan 9 draw device.
So there is some library work to be done first. Since the Go standard
library also contains the most important drawing primitives
implemented by the Plan 9 draw device (with the exception of font
rendering, but there is golang.org/x/image/font), you may be able to
ignore a lot of functionality provided by the Plan 9 draw library and
focus on a few things like loading pixel data directly to the draw
device.

See: http://man.cat-v.org/plan_9/3/draw

Jeremy

On Sat, 4 Apr 2020 at 06:55, Kim Lassila <kim.lassila@gmail.com> wrote:
>
> Has anyone written a graphical application in Go on Plan 9? How would the Go equivalent of black.c (thank you fgb) look like?
>
> - - - clip - - -
>
> #include <u.h>
> #include <libc.h>
> #include <draw.h>
>
> void
> main(int, char *argv[])
> {
> Rectangle rect;
> Image *black;
>
> fmtinstall('R', Rfmt);
> if(initdraw(nil, nil, argv[0]) < 0)
> sysfatal("initdraw: %r");
> rect = screen->r;
> black = display->black;
> draw(screen, rect, black, nil, ZP);
> flushimage(display, 1);
> sleep(5 * 1000);
> closedisplay(display);
> print("rectangle was %R\n", rect);
> exits(nil);
> }
>
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