From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <14ec7b180807030757u32f499ebvb918df63fdaf1c48@mail.gmail.com>
Date: Thu,  3 Jul 2008 08:57:17 -0600
From: "andrey mirtchovski" <mirtchovski@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
In-Reply-To: <509071940807030738r4dae6987j57b3db92bf7606bf@mail.gmail.com>
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References: <509071940807030738r4dae6987j57b3db92bf7606bf@mail.gmail.com>
Subject: Re: [9fans] 9vx.OSX bug: resize on second display causes window to
	go wrong
Topicbox-Message-UUID: d8f73172-ead3-11e9-9d60-3106f5b1d025

I think the problem comes from 9vx picking up the main display's
dimensions as the preallocation for "full screen". Drawterm has a fix
for that which loops through all the currently attached displays and
picks up the one with the largest size to decide what the "maximum
dimensions" should be.

here's the relevant code from drawterm:

/* figure out which display is the largest and return its bounds so we can
 * preallocate drawterm's screen to that
 */
Point
get_largest_screen()
{
	CGDirectDisplayID 	*displaylist;
	CGDisplayCount 		displaycount;
	OSErr 				err;
	int i;
	Point max = Pt(0, 0);
	Point curr;
	err = CGGetActiveDisplayList(0, NULL, &displaycount);
	if(err != noErr)
		sysfatal("can not enumerate active displays");

	displaylist = (CGDirectDisplayID *)malloc(displaycount *
sizeof(CGDirectDisplayID));
	if(displaylist == NULL)
		sysfatal("can not allocate memory for display list");

	err = CGGetActiveDisplayList(displaycount, displaylist, &displaycount);
	if(err != noErr)
		sysfatal("can not obtain active display list");

	for(i = 0; i < displaycount; i++) {
		curr.x = CGDisplayPixelsWide(displaylist[i]);
		curr.y = CGDisplayPixelsHigh(displaylist[i]);

		if(max.x < curr.x)
			max.x = curr.x;
		if(max.y < curr.y)
			max.y = curr.y;
	}

	free(displaylist);

	return max;

}
you will need to modify _screeninit() in 9vx/osx/screen.c to something like:

Point max = get_largest_screen();
osx.fullscreenr = Rect(0, 0, max.size.width, max.size.height);

this is tentative. i have no second screen to test right now.

On Thu, Jul 3, 2008 at 8:38 AM, Anthony Sorace <anothy@gmail.com> wrote:
> I have a 10.5 MacBook with an external display attached. When I start
> 9vx, things look normal. I can resize the window on the main display.
> If I move it to the second display and resize, the window goes from
> "good" to "bad":
>
> http://strand1.com/who/anthony/bug/good.png
> http://strand1.com/who/anthony/bug/bad.png
>
> Resizing the window back to the original geometry makes the window "good" again.
>
> Note that this is "just" a display issue. Things within 9vx continue
> to run just fine, and can update the display (although that becomes
> unreliable, especially in the portion of rio windows to the left of
> where they should be). Dragging my mouse over where the rio window
> border should be causes the cursor to turn into the "resize" cursor,
> and resizing works fine, dragging the still-slanted window around.
>
> This happens independent of what's running within 9vx: I see the same
> thing even with no rio.
> Anthony
>
>