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Improve SDL_CreateWindow() fullscreen support on Windows

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.. and maybe other platforms as well (though X11 was not affected)?

The issue was that passing a higher resolution than the current desktop
resolution to SDL_CreateWindow() with SDL_WINDOW_FULLSCREEN didn't switch
to that resolution (even though it did switch to lower resolutions).

When creating a fullscreen window, window->fullscreen wasn't even set
at all (only zeroed out), setting it only happened if the user explicitly
called SDL_SetWindowDisplayMode(). So without that, SDL_CreateWindow()
-> SDL_UpdateFullscreenMode() -> SDL_GetWindowDisplayMode() used the
resolution from window->windowed.w/h which were limited to the desktop size
due to some weird combination of WIN_AdjustWindowRectWithStyle() and
WIN_WindowProc() being called after a call to SetWindowPos().

fixes #3313
This commit is contained in:
Daniel Gibson 2021-05-19 18:47:56 +02:00 committed by Sam Lantinga
parent 9fdb06450d
commit 72d8128520
1 changed files with 16 additions and 0 deletions
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16
src/video/SDL_video.c
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@ -1598,6 +1598,22 @@ SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
displayIndex = SDL_GetIndexOfDisplay(display);
SDL_GetDisplayBounds(displayIndex, &bounds);
/* for real fullscreen we might switch the resolution, so get width and height
* from closest supported mode and use that instead of current resolution
*/
if ((flags & SDL_WINDOW_FULLSCREEN_DESKTOP) != SDL_WINDOW_FULLSCREEN_DESKTOP
&& (bounds.w != w || bounds.h != h)) {
SDL_DisplayMode fullscreen_mode, closest_mode;
SDL_zero(fullscreen_mode);
fullscreen_mode.w = w;
fullscreen_mode.h = h;
if(SDL_GetClosestDisplayModeForDisplay(display, &fullscreen_mode, &closest_mode) != NULL) {
bounds.w = closest_mode.w;
bounds.h = closest_mode.h;
}
}
window->fullscreen_mode.w = bounds.w;
window->fullscreen_mode.h = bounds.h;
window->x = bounds.x;
window->y = bounds.y;
window->w = bounds.w;