Allegro 5.1.9 (GIT) -- al_set_new_window_position

no-reply@allegro.cc (Stagera) — Tue, 11 Feb 2014 17:18:34 +0000

Hi,
I'm trying to create a 100*100 window in the middle of the screen. My resolution is 1920x1080.
I've set the upper-left corner at 960,540 but the windows is drawn further (Screenshot attached).

Maybe someone can help me out

#SelectExpand
  1#include 
  2#include 
  3
  4int main(int argc, char **argv)
  5{
  6   ALLEGRO_DISPLAY *display = NULL;
  7
  8   al_init();
  9   ALLEGRO_MONITOR_INFO info;
 10   al_get_monitor_info(0, &info);
 11
 12   fprintf(stderr, "info.x1: %d -- info.x2: %d\n", info.x1,info.x2);
 13   fprintf(stderr, "info.y1: %d -- info.y2: %d\n\n", info.y1,info.y2);
 14
 15   al_set_new_window_position(info.x2 / 2, info.y2 / 2);
 16   fprintf(stderr, "set new window position: %d %d\n\n", info.x2 / 2, info.y2 / 2);
 17   al_set_new_display_flags (ALLEGRO_FRAMELESS);
 18   display = al_create_display(100, 100);
 19   al_clear_to_color(al_map_rgb(0,0,0));
 20   al_flip_display();
 21
 22   int x,y;
 23   al_get_window_position(display, &x, &y);
 24   fprintf(stderr, "get window position: %d %d\n\n", x, y);
 25
 26   al_rest(10.0);
 27
 28   al_destroy_display(display);
 29   return 0;
 30}

no-reply@allegro.cc (pkrcel) — Tue, 11 Feb 2014 18:22:43 +0000

I can't really evaluate the apparent discrepancy from the screenshot

the top lef corner seems indeed a bit off....try drawing the window WITH the frame and check wehre that ends up drwan.

no-reply@allegro.cc (Stagera) — Tue, 11 Feb 2014 18:31:40 +0000

Hi pkrcel,
the gap is always present, also when I draw the frame.

The screenshot refer to my last test. I did several.
With a bigger window it's more noticeable

Update
On Windows Seven/XP the window is correctly created in the middle of the screen
Displacement happens only on Windows 8 (8.1)

no-reply@allegro.cc (SiegeLord) — Wed, 12 Feb 2014 19:26:54 +0000

Stagera said:

Displacement happens only on Windows 8 (8.1)

Damn, I was going to try to fix this, but I only have Windows 7 .

no-reply@allegro.cc (Stagera) — Thu, 13 Feb 2014 02:12:08 +0000

Also the window size is messed up on my Windows 8.1
The real size of a 100*100 window (no frame) is 125*125 pixel