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>

diff --git a/ui/sdl2.c b/ui/sdl2.c
index e4cb9fbba6ff2b04b4d0dac4224d095de274a96a..7506e2e13f2724377b1e6ab4a6bb6100dd08c160 100644 (file)
--- 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)) {