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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.
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urkle committed Feb 20, 2015
1 parent aefcd86 commit 635a369c9ddd19d518e7851298beee2d532a9759
Showing with 4 additions and 3 deletions.
  1. +4 −3 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;

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