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x11: check to see if displays moved when connected/disconnected 

Fixes https://github.com/libsdl-org/SDL/issues/9738
This commit is contained in:
Sam Lantinga 2025-01-17 13:13:37 -08:00
parent 1848ce680b
commit 59ea078ee2
1 changed files with 43 additions and 29 deletions
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72
src/video/x11/SDL_x11modes.c
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@ -541,6 +541,38 @@ static bool X11_UpdateXRandRDisplay(SDL_VideoDevice *_this, Display *dpy, int sc
return true;
}
static XRRScreenResources *X11_GetScreenResources(Display *dpy, int screen)
{
XRRScreenResources *res = X11_XRRGetScreenResourcesCurrent(dpy, RootWindow(dpy, screen));
if (!res || res->noutput == 0) {
if (res) {
X11_XRRFreeScreenResources(res);
}
res = X11_XRRGetScreenResources(dpy, RootWindow(dpy, screen));
}
return res;
}
static void X11_CheckDisplaysMoved(SDL_VideoDevice *_this, Display *dpy)
{
const int screen = DefaultScreen(dpy);
XRRScreenResources *res = X11_GetScreenResources(dpy, screen);
if (!res) {
return;
}
SDL_DisplayID *displays = SDL_GetDisplays(NULL);
if (displays) {
for (int i = 0; displays[i]; ++i) {
SDL_VideoDisplay *display = SDL_GetVideoDisplay(displays[i]);
const SDL_DisplayData *displaydata = display->internal;
X11_UpdateXRandRDisplay(_this, dpy, screen, displaydata->xrandr_output, res, display);
}
SDL_free(displays);
}
X11_XRRFreeScreenResources(res);
}
static void X11_HandleXRandROutputChange(SDL_VideoDevice *_this, const XRROutputChangeNotifyEvent *ev)
{
SDL_DisplayID *displays;
@ -568,29 +600,19 @@ static void X11_HandleXRandROutputChange(SDL_VideoDevice *_this, const XRROutput
if (display) {
SDL_DelVideoDisplay(display->id, true);
}
X11_CheckDisplaysMoved(_this, ev->display);
} else if (ev->connection == RR_Connected) { // output is coming online
Display *dpy = ev->display;
const int screen = DefaultScreen(dpy);
XVisualInfo vinfo;
if (get_visualinfo(dpy, screen, &vinfo)) {
XRRScreenResources *res = X11_XRRGetScreenResourcesCurrent(dpy, RootWindow(dpy, screen));
if (!res || res->noutput == 0) {
if (res) {
X11_XRRFreeScreenResources(res);
}
res = X11_XRRGetScreenResources(dpy, RootWindow(dpy, screen));
}
if (!display) {
Display *dpy = ev->display;
const int screen = DefaultScreen(dpy);
XRRScreenResources *res = X11_GetScreenResources(dpy, screen);
if (res) {
if (display) {
X11_UpdateXRandRDisplay(_this, dpy, screen, ev->output, res, display);
} else {
X11_AddXRandRDisplay(_this, dpy, screen, ev->output, res, true);
}
X11_AddXRandRDisplay(_this, dpy, screen, ev->output, res, true);
X11_XRRFreeScreenResources(res);
}
}
X11_CheckDisplaysMoved(_this, ev->display);
}
}
@ -661,7 +683,6 @@ static bool X11_InitModes_XRandR(SDL_VideoDevice *_this)
const int screencount = ScreenCount(dpy);
const int default_screen = DefaultScreen(dpy);
RROutput primary = X11_XRRGetOutputPrimary(dpy, RootWindow(dpy, default_screen));
XRRScreenResources *res = NULL;
int xrandr_error_base = 0;
int looking_for_primary;
int output;
@ -679,16 +700,9 @@ static bool X11_InitModes_XRandR(SDL_VideoDevice *_this)
continue;
}
res = X11_XRRGetScreenResourcesCurrent(dpy, RootWindow(dpy, screen));
if (!res || res->noutput == 0) {
if (res) {
X11_XRRFreeScreenResources(res);
}
res = X11_XRRGetScreenResources(dpy, RootWindow(dpy, screen));
if (!res) {
continue;
}
XRRScreenResources *res = X11_GetScreenResources(dpy, screen);
if (!res) {
continue;
}
for (output = 0; output < res->noutput; output++) {