Do not treat Alt-Tab as resolution change (bug 7866)

CHANGELOG.md

@@ -157,6 +157,7 @@
     Bug #7840: First run of the launcher doesn't save viewing distance as the default value
     Bug #7841: Editor: "Dirty" water heights are saved in modified CELLs
     Bug #7859: AutoCalc flag is not used to calculate potion value
+    Bug #7866: Alt-tabbing is considered as a resolution change
     Feature #2566: Handle NAM9 records for manual cell references
     Feature #3537: Shader-based water ripples
     Feature #5173: Support for NiFogProperty

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -1172,6 +1172,9 @@ namespace MWGui
 
     void WindowManager::windowResized(int x, int y)
     {
+        if (x == Settings::video().mResolutionX && y == Settings::video().mResolutionY)
+            return;
+
         Settings::video().mResolutionX.set(x);
         Settings::video().mResolutionY.set(y);
 

components/sdlutil/sdlinputwrapper.cpp

@@ -252,6 +252,11 @@ namespace SDLUtil
                 SDL_GL_GetDrawableSize(mSDLWindow, &w, &h);
                 int x, y;
                 SDL_GetWindowPosition(mSDLWindow, &x, &y);
+
+                // Happens when you Alt-Tab out of game
+                if (w == 0 && h == 0)
+                    return;
+
                 mViewer->getCamera()->getGraphicsContext()->resized(x, y, w, h);
 
                 mViewer->getEventQueue()->windowResize(x, y, w, h);