input: sdl2: Fix relative mode to match SDL1 behavior

Right now relative mode accelerates too fast, and has the 'invisible wall'
problem. SDL2 added an explicit API to handle this use case, so let's use
it.

Signed-off-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/ui/sdl2.c b/ui/sdl2.c
index e4cb9fbba6..7506e2e13f 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -278,7 +278,7 @@ static void sdl_hide_cursor(void)
         SDL_ShowCursor(1);
         SDL_SetCursor(sdl_cursor_hidden);
     } else {
-        SDL_ShowCursor(0);
+        SDL_SetRelativeMouseMode(SDL_TRUE);
     }
 }
 
@@ -289,6 +289,7 @@ static void sdl_show_cursor(void)
     }
 
     if (!qemu_input_is_absolute()) {
+        SDL_SetRelativeMouseMode(SDL_FALSE);
         SDL_ShowCursor(1);
         if (guest_cursor &&
             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {