[gimp] app: flush blur cache and other caches when invalid

[Alexia Death <alexiade src gnome org>]

commit 43681a6d4cbca3260cc22821a80eeeec26288e7b
Author: Alexia Death <alexiadeath gmail com>
Date:   Tue Nov 29 21:25:02 2016 +0200

    app: flush blur cache and other caches when invalid

 app/core/gimpbrush.c      |   10 ++++++++++
 app/paint/gimpbrushcore.c |   11 +++++------
 2 files changed, 15 insertions(+), 6 deletions(-)
---
diff --git a/app/core/gimpbrush.c b/app/core/gimpbrush.c
index 05bd3b6..6fd8ca9 100644
--- a/app/core/gimpbrush.c
+++ b/app/core/gimpbrush.c
@@ -937,6 +937,16 @@ gimp_brush_flush_blur_caches (GimpBrush *brush)
       gimp_temp_buf_unref (brush->priv->blured_pixmap);
       brush->priv->blured_pixmap = NULL;
     }
+
+  if (brush->priv->mask_cache)
+    gimp_brush_cache_clear (brush->priv->mask_cache);
+
+  if (brush->priv->pixmap_cache)
+    gimp_brush_cache_clear (brush->priv->pixmap_cache);
+
+  if (brush->priv->boundary_cache)
+    gimp_brush_cache_clear (brush->priv->boundary_cache);
+
 }
 
 gdouble
diff --git a/app/paint/gimpbrushcore.c b/app/paint/gimpbrushcore.c
index 7baef54..c6f0ad0 100644
--- a/app/paint/gimpbrushcore.c
+++ b/app/paint/gimpbrushcore.c
@@ -366,6 +366,11 @@ gimp_brush_core_pre_paint (GimpPaintCore    *paint_core,
                                                  &last_coords,
                                                  &current_coords);
         }
+      if ((! GIMP_IS_BRUSH_GENERATED(core->main_brush)) &&
+          (paint_options->brush_hardness != gimp_brush_get_blur_hardness(core->main_brush)))
+        {
+          gimp_brush_flush_blur_caches(core->main_brush);
+        }
     }
 
   return TRUE;
@@ -414,12 +419,6 @@ gimp_brush_core_start (GimpPaintCore     *paint_core,
       return FALSE;
     }
 
-  if ((! GIMP_IS_BRUSH_GENERATED(core->main_brush)) &&
-      (core->hardness != gimp_brush_get_blur_hardness(core->main_brush)))
-  {
-    gimp_brush_flush_blur_caches(core->main_brush);
-  }
-
   if (GIMP_BRUSH_CORE_GET_CLASS (core)->handles_transforming_brush)
     {
       gimp_brush_core_eval_transform_dynamics (core,