From 761462bc771e916bc71dd9b116c9227b495fe7a9 Mon Sep 17 00:00:00 2001
From: Hugo Rodrigues <me@hugorodrigues.com>
Date: Sun, 20 Aug 2006 12:13:40 +0000
Subject: Object groups can be blurred. Blur slider updates when selection
 changes. Comments added/fixed.

(bzr r1622)
---
 src/display/nr-arena-group.cpp | 40 ++++++++++++++++++++++++++++++++++++++--
 src/display/nr-arena-shape.cpp | 10 +++++++---
 src/display/nr-filter.cpp      |  3 ++-
 3 files changed, 47 insertions(+), 6 deletions(-)

(limited to 'src/display')

diff --git a/src/display/nr-arena-group.cpp b/src/display/nr-arena-group.cpp
index b4cc3930b..8df045332 100644
--- a/src/display/nr-arena-group.cpp
+++ b/src/display/nr-arena-group.cpp
@@ -14,7 +14,11 @@
 
 #include "display/nr-arena-group.h"
 #include "display/nr-filter.h"
+#include "display/nr-filter-gaussian.h"
+#include "display/nr-filter-types.h"
 #include "style.h"
+#include "sp-filter.h"
+#include "sp-gaussian-blur.h"
 
 static void nr_arena_group_class_init (NRArenaGroupClass *klass);
 static void nr_arena_group_init (NRArenaGroup *group);
@@ -193,9 +197,41 @@ void nr_arena_group_set_style (NRArenaGroup *group, SPStyle *style)
   if (group->style) sp_style_unref(group->style);
   group->style = style;
 
+  //if there is a filter set for this group
   if (style && style->filter.set && style->filter.filter) {
-    group->filter = new NR::Filter();
-  }
+  
+        group->filter = new NR::Filter();
+        group->filter->set_x(style->filter.filter->x);
+        group->filter->set_y(style->filter.filter->y);
+        group->filter->set_width(style->filter.filter->width);
+        group->filter->set_height(style->filter.filter->height);
+        
+        //go through all SP filter primitives
+        for(int i=0; i<style->filter.filter->_primitive_count; i++)
+        {
+            SPFilterPrimitive *primitive = style->filter.filter->_primitives[i];
+            //if primitive is gaussianblur
+//            if(SP_IS_GAUSSIANBLUR(primitive))
+            {
+                NR::FilterGaussian * gaussian = (NR::FilterGaussian *) group->filter->add_primitive(NR::NR_FILTER_GAUSSIANBLUR);
+                SPGaussianBlur * spblur = SP_GAUSSIANBLUR(primitive);
+                float num = spblur->stdDeviation.getNumber();
+                if( num>=0.0 )
+                {
+                    float optnum = spblur->stdDeviation.getOptNumber();
+                    if( optnum>=0.0 )
+                        gaussian->set_deviation((double) num, (double) optnum);
+                    else
+                        gaussian->set_deviation((double) num);
+                }
+            }
+        }
+    }
+    else
+    {
+        //no filter set for this group
+        group->filter = NULL;
+    }
 
   if (style && style->enable_background.set
       && style->enable_background.value == SP_CSS_BACKGROUND_NEW) {
diff --git a/src/display/nr-arena-shape.cpp b/src/display/nr-arena-shape.cpp
index f9c203187..2f278b3de 100644
--- a/src/display/nr-arena-shape.cpp
+++ b/src/display/nr-arena-shape.cpp
@@ -1089,9 +1089,8 @@ nr_arena_shape_set_style(NRArenaShape *shape, SPStyle *style)
     }
     shape->setMitreLimit(style->stroke_miterlimit.value);
 
-    /* TODO: after SPStyle handles filters, get the correct filter
-     * from there. */
-    if (style->filter.set && style->filter.filter)
+    //if shape has a filter
+    if (style->filter.set && style->filter.filter) 
     {
         shape->filter = new NR::Filter();
         shape->filter->set_x(style->filter.filter->x);
@@ -1120,6 +1119,11 @@ nr_arena_shape_set_style(NRArenaShape *shape, SPStyle *style)
             }
         }
     }
+    else
+    {
+        //no filter set for this shape
+        shape->filter = NULL;
+    }
 
     nr_arena_item_request_update(shape, NR_ARENA_ITEM_STATE_ALL, FALSE);
 }
diff --git a/src/display/nr-filter.cpp b/src/display/nr-filter.cpp
index a96b02a62..35d8804e7 100644
--- a/src/display/nr-filter.cpp
+++ b/src/display/nr-filter.cpp
@@ -131,7 +131,8 @@ int Filter::render(NRArenaItem const *item, NRPixBlock *pb)
     in = NULL; // in is now handled by FilterSlot, we should not touch it
 
     // TODO: loop through the primitives and render them one at a time
-    _primitive[0]->render(slot, trans);
+    if(_primitive[0])
+		_primitive[0]->render(slot, trans);
 
     NRPixBlock *out = slot.get(_output_slot);
 
-- 
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