fix/workaround [#34026] Blender starts with too large window

Minimal change to stop blender window opening across all monitors.

Workaround the problem by starting maximized, and using sane defaults for non maximized window.

I checked on a few different solutions to this, Using Xinerama works OK, but with different size monitors
and not knowing which one the window-manager will pick in advance - this can be wrong too.

Now instead of opening with the screen size, just start maximized and use a default size for the non-maximized window (clamped by the screen size).

This isn't perfect since you could have 2x monitors at 1024x768, open blender, un-maximize - and blender window would cross over into the second monitor.

1 files changed, 17 insertions, 2 deletions

diff --git a/source/blender/windowmanager/intern/wm_window.c b/source/blender/windowmanager/intern/wm_window.c
index 44c5693c3e3..bd6342ebc25 100644
--- a/source/blender/windowmanager/intern/wm_window.c
+++ b/source/blender/windowmanager/intern/wm_window.c
@@ -425,6 +425,15 @@ void wm_window_add_ghostwindows(wmWindowManager *wm)
 			wm_set_apple_prefsize(wm_init_state.size_x, wm_init_state.size_y);
 		}
 #else
+		/* default size when un-maximized, unless the screen(s) are smaller */
+
+		/* clamp by these arbitrary values because currently wm_get_screensize()
+		 * will span multiple monitors and using xinerama isnt totally reliable
+		 * since we don't which monitor the window manager will put the blender
+		 * window in. */
+		wm_init_state.size_x = MIN2(1800, wm_init_state.size_x - 100);
+		wm_init_state.size_y = MIN2(980,  wm_init_state.size_y - 100);
+
 		wm_init_state.start_x = 0;
 		wm_init_state.start_y = 0;
 		
@@ -439,8 +448,14 @@ void wm_window_add_ghostwindows(wmWindowManager *wm)
 				win->sizex = wm_init_state.size_x;
 				win->sizey = wm_init_state.size_y;
 
-				/* we can't properly resize a maximized window */
-				win->windowstate = GHOST_kWindowStateNormal;
+				if (wm_init_state.override_flag & WIN_OVERRIDE_GEOM) {
+					/* we can't properly resize a maximized window */
+					win->windowstate = GHOST_kWindowStateNormal;
+				}
+				else {
+					/* otherwise default factory settings start maximized */
+					win->windowstate = GHOST_kWindowStateMaximized;
+				}
 
 				wm_init_state.override_flag &= ~WIN_OVERRIDE_GEOM;
 			}