Re: [AD] windows resizing regression

[Trent Gamblin <trent@xxxxxxxxxx>]

You can pull up as many mailing list posts as you want, but Elias and I discussed this
and every other issue for hours on end when we were creating the graphics API. I
already stated the reason al_acknowledge_resize was initially used in combination
with al_resize_display, and it's evidenced in the examples. The _initial_ reason for
having it is as you pointed out. Let's not start an internet p%*@ing match here.

--
Trent Gamblin

On 2010-11-08, at 9:23 PM, Peter Wang wrote:

> On 2010-11-08, Evert Glebbeek <eglebbk@xxxxxxxxxx> wrote:
>> On 8 Nov 2010, at 22:41 , Trent Gamblin wrote:
>>> Just look at the examples. ex_resize, ex_fs_resize, and ex_fs_window are the only
>>> ones that call al_resize_display. And ex_fs_window is the only one that currently
>>> doesn't have a call to al_acknowledge_resize. It was planned that way from the beginning by Elias and I. Something may have changed that I missed, or something may
>>> need to change, and that's fine...
>> 
>> What I described is what I've always understood the behaviour to be.
> 
> It has been so at least since r8025.
> 
>    Author: Elias Pschernig
>    Date:   Sat Jun 30 16:18:47 2007 +0000
> 
>    Implemented immediate-resize for al_resize_display, and implemented fullscreen resizing.
> 
>> 
>>> And the original reason for the al_acknowledge_resize was that on X11 you have to wait
>>> for an event to come to tell you when you can resize the display, which could take an
>>> indeterminate amount of time.
>> 
>> I thought it was about not changing the size of the backbuffer on the user in the middle of a graphic update.
> 
> Yes.  It goes back at least as early as Dec 2006, when Elias writes on [AD]:
> 
>    The problem is, doing the resizing asynchronously, that is, change
>    internal display dimensions, clipping, OpenGL setup, and so on,
>    asynchronously from the background thread whenever an X11 resize event
>    is received, seems like a very bad idea.
> 
> al_acknowledge_resize is introduced to react to the user resizing the
> display.
> 
> Peter