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Bail out if Xrandr returns zero CRTCs in the X11 messagebox implementation

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Everett Afton 2025-05-14 22:10:51 +03:00 committed by Ryan C. Gordon
parent c147ddf3e3
commit ca988dbc2c
1 changed files with 14 additions and 2 deletions
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16
src/video/x11/SDL_x11messagebox.c
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@ -524,13 +524,25 @@ static bool X11_MessageBoxCreateWindow(SDL_MessageBoxDataX11 *data)
#ifdef SDL_VIDEO_DRIVER_X11_XRANDR #ifdef SDL_VIDEO_DRIVER_X11_XRANDR
else if (SDL_GetHintBoolean(SDL_HINT_VIDEO_X11_XRANDR, use_xrandr_by_default) && data->xrandr) { else if (SDL_GetHintBoolean(SDL_HINT_VIDEO_X11_XRANDR, use_xrandr_by_default) && data->xrandr) {
XRRScreenResources *screen = X11_XRRGetScreenResourcesCurrent(display, DefaultRootWindow(display)); XRRScreenResources *screen = X11_XRRGetScreenResourcesCurrent(display, DefaultRootWindow(display));
if (!screen) {
goto XRANDRBAIL;
}
if (!screen->ncrtc) {
goto XRANDRBAIL;
}
XRRCrtcInfo *crtc_info = X11_XRRGetCrtcInfo(display, screen, screen->crtcs[0]); XRRCrtcInfo *crtc_info = X11_XRRGetCrtcInfo(display, screen, screen->crtcs[0]);
x = (crtc_info->width - data->dialog_width) / 2; if (crtc_info) {
y = (crtc_info->height - data->dialog_height) / 3; x = (crtc_info->width - data->dialog_width) / 2;
y = (crtc_info->height - data->dialog_height) / 3;
} else {
goto XRANDRBAIL;
}
} }
#endif #endif
else { else {
// oh well. This will misposition on a multi-head setup. Init first next time. // oh well. This will misposition on a multi-head setup. Init first next time.
XRANDRBAIL:
x = (DisplayWidth(display, data->screen) - data->dialog_width) / 2; x = (DisplayWidth(display, data->screen) - data->dialog_width) / 2;
y = (DisplayHeight(display, data->screen) - data->dialog_height) / 3; y = (DisplayHeight(display, data->screen) - data->dialog_height) / 3;
} }