Pointer sanitization - sdl

Adapt the sanitized pointer handling, discussed at libretro#17196 :

sdl driver specific changes:

    lightgun position handling fixed
    lightgun buttons mapped in a fixed way for now

input/drivers/sdl_input.c

@@ -290,24 +290,39 @@ static int16_t sdl_input_state(
          break;
       case RETRO_DEVICE_KEYBOARD:
          return (id && id < RETROK_LAST) && sdl_key_pressed(id);
-      /* TODO: update to match other input drivers (aiming state, button binds) */
+      /* TODO: update button binds to match other input drivers */
       case RETRO_DEVICE_LIGHTGUN:
+
+         struct video_viewport vp    = {0};
+         int16_t res_x               = 0;
+         int16_t res_y               = 0;
+         int16_t res_screen_x        = 0;
+         int16_t res_screen_y        = 0;
+
+         if (video_driver_translate_coord_viewport_wrap(
+                     &vp, sdl->mouse_abs_x, sdl->mouse_abs_y,
+                     &res_x, &res_y, &res_screen_x, &res_screen_y))
+
          switch (id)
          {
+            case RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X:
+               return res_x;
+            case RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y:
+               return res_y;
+            case RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN:
+               return input_driver_pointer_is_offscreen(res_x, res_y);
             case RETRO_DEVICE_ID_LIGHTGUN_X:
                return sdl->mouse_x;
             case RETRO_DEVICE_ID_LIGHTGUN_Y:
                return sdl->mouse_y;
             case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
                return sdl->mouse_l;
-            case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
+            case RETRO_DEVICE_ID_LIGHTGUN_RELOAD:
                return sdl->mouse_m;
-            case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
-               return sdl->mouse_r;
             case RETRO_DEVICE_ID_LIGHTGUN_START:
-               return sdl->mouse_m && sdl->mouse_r;
-            case RETRO_DEVICE_ID_LIGHTGUN_PAUSE:
-               return sdl->mouse_m && sdl->mouse_l;
+               return sdl->mouse_r;
+            case RETRO_DEVICE_ID_LIGHTGUN_SELECT:
+               return sdl->mouse_l && sdl->mouse_r;
          }
          break;
    }