SDL_SetWindowPosition respects display num for SDL_WINDOWPOS_CENTERED_DISPLAY. This allows for this kind of code in an application: int monitorID = 1; // the second monitor! SDL_SetWindowPosition(sdlWin, SDL_WINDOWPOS_CENTERED_DISPLAY(monitorID), SDL_WINDOWPOS_CENTERED_DISPLAY(monitorID)); Fixes Bugzilla #2849.
diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index db777db..1dcfabf 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -1607,13 +1607,14 @@ SDL_SetWindowPosition(SDL_Window * window, int x, int y)
CHECK_WINDOW_MAGIC(window,);
if (SDL_WINDOWPOS_ISCENTERED(x) || SDL_WINDOWPOS_ISCENTERED(y)) {
- SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
- int displayIndex;
+ int displayIndex = (x & 0xFFFF);
SDL_Rect bounds;
+ if (displayIndex > _this->num_displays) {
+ displayIndex = 0;
+ }
SDL_zero(bounds);
- displayIndex = SDL_GetIndexOfDisplay(display);
SDL_GetDisplayBounds(displayIndex, &bounds);
if (SDL_WINDOWPOS_ISCENTERED(x)) {
x = bounds.x + (bounds.w - window->w) / 2;