vout_ManageWrapper: reset display pool after we reset render

Fixes: #3899

include/vlc_vout_wrapper.h

@@ -82,7 +82,7 @@ VLC_API bool vout_IsDisplayFiltered(vout_display_t *);
 VLC_API picture_t * vout_FilterDisplay(vout_display_t *, picture_t *);
 VLC_API bool vout_AreDisplayPicturesInvalid(vout_display_t *);
 
-VLC_API void vout_ManageDisplay(vout_display_t *, bool allow_reset_pictures);
+VLC_API bool vout_ManageDisplay(vout_display_t *, bool allow_reset_pictures);
 
 VLC_API void vout_SetDisplayFullscreen(vout_display_t *, bool is_fullscreen);
 VLC_API void vout_SetDisplayFilled(vout_display_t *, bool is_filled);

src/video_output/display.c

@@ -755,7 +755,7 @@ static void VoutDisplayCropRatio(int *left, int *top, int *right, int *bottom,
     }
 }
 
-void vout_ManageDisplay(vout_display_t *vd, bool allow_reset_pictures)
+bool vout_ManageDisplay(vout_display_t *vd, bool allow_reset_pictures)
 {
     vout_display_owner_sys_t *osys = vd->owner.sys;
 
@@ -1055,6 +1055,8 @@ void vout_ManageDisplay(vout_display_t *vd, bool allow_reset_pictures)
     }
     if (reset_render)
         VoutDisplayResetRender(vd);
+
+    return reset_render;
 }
 
 bool vout_AreDisplayPicturesInvalid(vout_display_t *vd)

src/video_output/vout_wrapper.c

@@ -181,8 +181,8 @@ void vout_ManageWrapper(vout_thread_t *vout)
     vout_thread_sys_t *sys = vout->p;
     vout_display_t *vd = sys->display.vd;
 
-    bool reset_display_pool = sys->display.use_dr && vout_AreDisplayPicturesInvalid(vd);
-    vout_ManageDisplay(vd, !sys->display.use_dr || reset_display_pool);
+    bool reset_display_pool = vout_AreDisplayPicturesInvalid(vd);
+    reset_display_pool |= vout_ManageDisplay(vd, !sys->display.use_dr || reset_display_pool);
 
     if (reset_display_pool) {
         sys->display.use_dr = !vout_IsDisplayFiltered(vd);