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Detect display change when fullscreen desktop windows move displays 

This happens when using Win+Alt+Left/Right on a resizable fullscreen desktop window on Windows

(cherry picked from commit 650e16a824)
This commit is contained in:
Sam Lantinga 2022-12-12 20:26:17 -08:00
parent 817454cfe6
commit c709741871
1 changed files with 19 additions and 3 deletions
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22
src/video/SDL_video.c
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@ -1198,16 +1198,32 @@ int SDL_GetWindowDisplayIndex(SDL_Window *window)
return displayIndex;
}
displayIndex = GetRectDisplayIndex(window->x, window->y, window->w, window->h);
/* Find the display containing the window if fullscreen */
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
if (display->fullscreen_window == window) {
return i;
if (displayIndex != i) {
if (displayIndex < 0) {
displayIndex = i;
} else {
SDL_VideoDisplay *new_display = &_this->displays[displayIndex];
/* The window was moved to a different display */
if (new_display->fullscreen_window != NULL) {
/* Uh oh, there's already a fullscreen window here */
} else {
new_display->fullscreen_window = window;
}
display->fullscreen_window = NULL;
}
}
break;
}
}
return GetRectDisplayIndex(window->x, window->y, window->w, window->h);
return displayIndex;
}
}