From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <8052e9979e33ecff799bacd84d2f565c@vitanuova.com>
To: 9fans@cse.psu.edu
Subject: Re: Re: [9fans] Anyone to try to convert Acme to full UI (w/graphics)
Date: Thu, 26 Oct 2006 19:35:11 +0100
From: rog@vitanuova.com
In-Reply-To: <123d17ac591ffb286e0a7aff61e1bd12@mail.gmx.net>
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> Dealing with different screen resolutions kind of sucks though, it
> could be that it's my rc scripting and understanding of the rio
> control namespace isn't very good yet.

possibly the first program i wrote when i first started using
plan 9 was to deal with this issue. i've attached it - it's tiny.
all it does is convert proportional coordinates [0..1] to screen
coords [0..max].

for instance,
	winpos 0.6 0.0 0.4 100p
gives a 100 pixel high rectangle that covers the right
40% of the screen.

i use it like this:

	window -r `{winpos 0 0.05 1 1} acme -l acme.dump

perhaps this might help?


#include <u.h>
#include <libc.h>

int makecoord(char*, int, int);
int getscreensize(int*, int*, int*, int*);

void
main(int argc, char **argv)
{
	int scrminx, scrminy, scrmaxx, scrmaxy;
	int minx, miny, sizex, sizey, maxx, maxy;
	/* usage: winpos xorg yorg xsize ysize */
	if (argc != 5) {
		fprint(2, "usage: winpos xorg yorg xsize ysize\n");
		exits("usage");
	}
	if (getscreensize(&scrminx, &scrminy, &scrmaxx, &scrmaxy) == -1) {
		fprint(2, "winpos: couldn't get screen size: %r\n");
		exits("no screen");
	}
	minx = makecoord(argv[1], scrminx, scrmaxx);
	miny = makecoord(argv[2], scrminy, scrmaxy);
	sizex = makecoord(argv[3], scrminx, scrmaxx);
	sizey = makecoord(argv[4], scrminy, scrmaxy);
	if (sizex > (scrmaxx - scrminx))
		sizex = scrmaxx - scrminx;
	if (sizey > (scrmaxy - scrminy))
		sizey = scrmaxy - scrminy;
	if (minx + sizex > scrmaxx)
		minx = scrmaxx - sizex;
	if (miny + sizey > scrmaxy)
		miny = scrmaxy - sizey;
	maxx = minx + sizex;
	maxy = miny + sizey;
	print("%d %d %d %d\n", minx, miny, maxx, maxy);
	exits(0);
}

int
makecoord(char *spec, int min, int max)
{
	if (spec[0] == 0)
		return 0;
	if (spec[strlen(spec) - 1] == 'p')
		return atoi(spec);
	return atof(spec) * (max - min) + min;
}

int
getscreensize(int *minx, int *miny, int *maxx, int *maxy)
{
	char buf[12*12+1];
	int fd;

	buf[sizeof(buf) - 1] = 0;
	fd = open("#i/draw/new", OREAD);
	if(fd < 0)
		return -1;
	if(read(fd, buf, sizeof buf - 1) != sizeof buf - 1){
		close(fd);
		return -1;
	}
	close(fd);
	*minx = atoi(buf+4*12);
	*miny = atoi(buf+5*12);
	*maxx = atoi(buf+6*12);
	*maxy = atoi(buf+7*12);
	return 0;
}