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https://github.com/Ryujinx/SDL.git
synced 2024-12-23 15:05:38 +00:00
x11: prevent a synthetic mouse event when using a touchscreen
With multitouch, register to receive XI_Motion (which desctivates MotionNotify), so that we can distinguish real mouse motions from synthetic one. (bug 4690)
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6ef01e5236
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@ -75,30 +75,38 @@ xinput2_version_atleast(const int version, const int wantmajor, const int wantmi
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}
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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static void
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xinput2_normalize_touch_coordinates(SDL_VideoData *videodata, Window window,
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double in_x, double in_y, float *out_x, float *out_y)
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static SDL_Window *
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xinput2_get_sdlwindow(SDL_VideoData *videodata, Window window)
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{
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int i;
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for (i = 0; i < videodata->numwindows; i++) {
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SDL_WindowData *d = videodata->windowlist[i];
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if (d->xwindow == window) {
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if (d->window->w == 1) {
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*out_x = 0.5f;
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} else {
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*out_x = in_x / (d->window->w - 1);
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}
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if (d->window->h == 1) {
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*out_y = 0.5f;
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} else {
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*out_y = in_y / (d->window->h - 1);
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}
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return;
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return d->window;
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}
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}
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// couldn't find the window...
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*out_x = in_x;
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*out_y = in_y;
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return NULL;
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}
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static void
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xinput2_normalize_touch_coordinates(SDL_Window *window, double in_x, double in_y, float *out_x, float *out_y)
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{
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if (window) {
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if (window->w == 1) {
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*out_x = 0.5f;
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} else {
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*out_x = in_x / (window->w - 1);
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}
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if (window->h == 1) {
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*out_y = 0.5f;
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} else {
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*out_y = in_y / (window->h - 1);
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}
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} else {
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// couldn't find the window...
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*out_x = in_x;
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*out_y = in_y;
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}
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}
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#endif /* SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH */
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@ -198,11 +206,30 @@ X11_HandleXinput2Event(SDL_VideoData *videodata,XGenericEventCookie *cookie)
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break;
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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/* With multitouch, register to receive XI_Motion (which desctivates MotionNotify),
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* so that we can distinguish real mouse motions from synthetic one. */
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case XI_Motion: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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int pointer_emulated = (xev->flags & XIPointerEmulated);
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if (! pointer_emulated) {
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SDL_Mouse *mouse = SDL_GetMouse();
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if(!mouse->relative_mode || mouse->relative_mode_warp) {
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SDL_Window *window = xinput2_get_sdlwindow(videodata, xev->event);
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if (window) {
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SDL_SendMouseMotion(window, 0, 0, xev->event_x, xev->event_y);
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}
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}
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}
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return 1;
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}
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break;
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case XI_TouchBegin: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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float x, y;
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xinput2_normalize_touch_coordinates(videodata, xev->event,
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xev->event_x, xev->event_y, &x, &y);
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SDL_Window *window = xinput2_get_sdlwindow(videodata, xev->event);
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xinput2_normalize_touch_coordinates(window, xev->event_x, xev->event_y, &x, &y);
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SDL_SendTouch(xev->sourceid,xev->detail, SDL_TRUE, x, y, 1.0);
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return 1;
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}
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@ -210,8 +237,8 @@ X11_HandleXinput2Event(SDL_VideoData *videodata,XGenericEventCookie *cookie)
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case XI_TouchEnd: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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float x, y;
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xinput2_normalize_touch_coordinates(videodata, xev->event,
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xev->event_x, xev->event_y, &x, &y);
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SDL_Window *window = xinput2_get_sdlwindow(videodata, xev->event);
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xinput2_normalize_touch_coordinates(window, xev->event_x, xev->event_y, &x, &y);
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SDL_SendTouch(xev->sourceid,xev->detail, SDL_FALSE, x, y, 1.0);
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return 1;
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}
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@ -219,8 +246,8 @@ X11_HandleXinput2Event(SDL_VideoData *videodata,XGenericEventCookie *cookie)
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case XI_TouchUpdate: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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float x, y;
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xinput2_normalize_touch_coordinates(videodata, xev->event,
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xev->event_x, xev->event_y, &x, &y);
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SDL_Window *window = xinput2_get_sdlwindow(videodata, xev->event);
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xinput2_normalize_touch_coordinates(window, xev->event_x, xev->event_y, &x, &y);
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SDL_SendTouchMotion(xev->sourceid,xev->detail, x, y, 1.0);
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return 1;
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}
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@ -272,9 +299,9 @@ X11_Xinput2SelectTouch(_THIS, SDL_Window *window)
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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SDL_VideoData *data = NULL;
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XIEventMask eventmask;
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unsigned char mask[3] = { 0,0,0 };
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unsigned char mask[4] = { 0, 0, 0, 0 };
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SDL_WindowData *window_data = NULL;
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if (!X11_Xinput2IsMultitouchSupported()) {
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return;
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}
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@ -289,6 +316,7 @@ X11_Xinput2SelectTouch(_THIS, SDL_Window *window)
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XISetMask(mask, XI_TouchBegin);
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XISetMask(mask, XI_TouchUpdate);
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XISetMask(mask, XI_TouchEnd);
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XISetMask(mask, XI_Motion);
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X11_XISelectEvents(data->display,window_data->xwindow,&eventmask,1);
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#endif
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