Fix T74898: Multiresolution Ghost After Orbiting

EEVEE and Workbench both had the same issue that they continue with the
last sample when leaving navigating. This is ok for regular meshes as
they are all the same. For multiresolution it ain't as a low res version
of the mesh is used during navigation.

This patch also resets the AA samples when the user leaves navigation.

2 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/draw/intern/DRW_render.h b/source/blender/draw/intern/DRW_render.h
index 382e7313f21..2d6d6c7d9d0 100644
--- a/source/blender/draw/intern/DRW_render.h
+++ b/source/blender/draw/intern/DRW_render.h
@@ -670,6 +670,7 @@ bool DRW_state_do_color_management(void);
 bool DRW_state_is_scene_render(void);
 bool DRW_state_is_opengl_render(void);
 bool DRW_state_is_playback(void);
+bool DRW_state_is_navigating(void);
 bool DRW_state_show_text(void);
 bool DRW_state_draw_support(void);
 bool DRW_state_draw_background(void);
diff --git a/source/blender/draw/intern/draw_manager.c b/source/blender/draw/intern/draw_manager.c
index cc618c76ccd..b265035f449 100644
--- a/source/blender/draw/intern/draw_manager.c
+++ b/source/blender/draw/intern/draw_manager.c
@@ -2575,6 +2575,15 @@ bool DRW_state_is_playback(void)
 }
 
 /**
+ * Is the user navigating the region.
+ */
+bool DRW_state_is_navigating(void)
+{
+  const RegionView3D *rv3d = DST.draw_ctx.rv3d;
+  return (rv3d) && (rv3d->rflag & (RV3D_NAVIGATING | RV3D_PAINTING));
+}
+
+/**
  * Should text draw in this mode?
  */
 bool DRW_state_show_text(void)