Added caching of multilayer items (storing multiple group ids for items).

common/view/view.cpp

@@ -207,7 +207,7 @@ void VIEW::SetGAL( GAL* aGal )
 
     // items need to be recached after changing GAL
     if( m_useGroups )
-        itemsRecache();
+        recacheAllItems();
 
     // force the new GAL to display the current viewport.
     SetCenter( m_center );
@@ -371,7 +371,7 @@ struct VIEW::drawItem
 
         if( view->m_useGroups )
         {
-            int group = aItem->m_cachedGroup;
+            int group = aItem->getGroup( currentLayer );
 
             if( group >= 0 && aItem->ViewIsVisible() )
             {
@@ -381,7 +381,7 @@ struct VIEW::drawItem
             else
             {
                 group = gal->BeginGroup();
-                aItem->m_cachedGroup = group;
+                aItem->setGroup( currentLayer, group );
                 view->m_painter->Draw( static_cast<EDA_ITEM*>( aItem ), currentLayer );
                 gal->EndGroup();
                 gal->DrawGroup( group );
@@ -419,11 +419,9 @@ void VIEW::redrawRect( const BOX2I& aRect )
         {
             drawItem drawFunc( this, l->id );
 
-            m_gal->BeginLayer();
             m_gal->SetLayerDepth( (double) l->renderingOrder );
             l->items->Query( aRect, drawFunc );
             l->isDirty = false;
-            m_gal->EndLayer();
 
             totalItems    += drawFunc.count;
             totalDrawTime += drawFunc.time;
@@ -454,7 +452,7 @@ struct VIEW::recacheItem
 {
     void operator()( VIEW_ITEM* aItem )
     {
-        aItem->m_cachedGroup = -1;
+        aItem->deleteGroups();
     }
 };
 
@@ -513,14 +511,19 @@ void VIEW::invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags )
             l->items->Insert( aItem );    /* reinsert */
 
             if( m_useGroups )
-                aItem->m_cachedGroup = -1;
+                aItem->deleteGroups();
         }
     }
 
-    if( m_useGroups && aItem->m_cachedGroup >= 0 )
+    if( m_useGroups && aItem->storesGroups() )
     {
-        m_gal->DeleteGroup( aItem->m_cachedGroup );
-        aItem->m_cachedGroup = -1;
+        std::vector<int> groups = aItem->getAllGroups();
+        for(std::vector<int>::iterator i = groups.begin(); i != groups.end(); i++ )
+        {
+            m_gal->DeleteGroup( *i );
+        }
+
+        aItem->deleteGroups();
     }
 }
 
@@ -534,10 +537,15 @@ struct VIEW::clearItemCache
 
     void operator()( VIEW_ITEM* aItem )
     {
-        if( aItem->m_cachedGroup >= 0 )
+        if( aItem->storesGroups() )
         {
-            view->GetGAL()->DeleteGroup( aItem->m_cachedGroup );
-            aItem->m_cachedGroup = -1;
+            std::vector<int> groups = aItem->getAllGroups();
+            for(std::vector<int>::iterator i = groups.begin(); i != groups.end(); i++ )
+            {
+                view->GetGAL()->DeleteGroup( *i );
+            }
+
+            aItem->deleteGroups();
         }
     }
 
@@ -560,7 +568,7 @@ void VIEW::clearGroupCache()
 }
 
 
-void VIEW::itemsRecache()
+void VIEW::recacheAllItems()
 {
     BOX2I r;
 

common/view/view_item.cpp

@@ -66,3 +66,70 @@ void VIEW_ITEM::ViewRelease()
         m_view->Remove( this );
     }
 }
+
+
+int VIEW_ITEM::getGroup( int aLayer ) const
+{
+    for( int i = 0; i < m_groupsSize; ++i )
+    {
+        if( m_groups[i].first == aLayer )
+            return m_groups[i].second;
+    }
+
+    return -1;
+}
+
+
+std::vector<int> VIEW_ITEM::getAllGroups() const
+{
+    std::vector<int> groups( m_groupsSize );
+
+    for( int i = 0; i < m_groupsSize; ++i )
+    {
+        groups[i] = m_groups[i].second;
+    }
+
+    return groups;
+}
+
+
+void VIEW_ITEM::setGroup( int aLayer, int aId )
+{
+    // Look if there is already an entry for the layer
+    for( int i = 0; i < m_groupsSize; ++i )
+    {
+        if( m_groups[i].first == aLayer )
+        {
+            m_groups[i].second = aId;
+            return;
+        }
+    }
+
+    // If there was no entry for the given layer - create one
+    GroupPair* newGroups = new GroupPair[m_groupsSize + 1];
+
+    if( m_groupsSize > 0 )
+    {
+        std::copy( m_groups, m_groups + m_groupsSize, newGroups );
+        delete m_groups;
+    }
+
+    m_groups = newGroups;
+    newGroups[m_groupsSize++] = GroupPair( aLayer, aId );
+}
+
+
+void VIEW_ITEM::deleteGroups()
+{
+    if( m_groupsSize > 0 )
+    {
+        delete m_groups;
+        m_groupsSize = 0;
+    }
+}
+
+
+bool VIEW_ITEM::storesGroups() const
+{
+    return ( m_groupsSize > 0 );
+}

include/view/view.h

@@ -351,7 +351,7 @@ private:
     void    clearGroupCache();
 
     ///* Rebuilds GAL display lists
-    void    itemsRecache();
+    void    recacheAllItems();
 
     /// Determines rendering order of layers. Used in display order sorting function.
     static bool compareRenderingOrder( VIEW_LAYER* i, VIEW_LAYER* j )

include/view/view_item.h

@@ -30,6 +30,8 @@
 #ifndef __VIEW_ITEM_H
 #define __VIEW_ITEM_H
 
+#include <vector>
+
 #include <math/box2.h>
 
 namespace KiGfx
@@ -52,7 +54,6 @@ class VIEW;
 class VIEW_ITEM
 {
 public:
-
     /**
      * Enum ViewUpdateFlags.
      * Defines the how severely the shape/appearance of the item has been changed:
@@ -67,7 +68,7 @@ public:
         ALL = 0xff
     };
 
-    VIEW_ITEM() : m_view( NULL ), m_viewVisible( true ), m_cachedGroup( -1 ) {}
+    VIEW_ITEM() : m_view( NULL ), m_viewVisible( true ), m_groupsSize( 0 ) {}
 
     /**
      * Destructor. For dynamic views, removes the item from the view.
@@ -167,13 +168,59 @@ protected:
         // release the item from a previously assigned dynamic view (if there is any)
         ViewRelease();
         m_view = aView;
-        m_cachedGroup = -1;
+        deleteGroups();
     }
 
     VIEW*   m_view;         ///* Current dynamic view the item is assigned to.
     bool    m_viewVisible;  ///* Are we visible in the current dynamic VIEW.
 private:
-    int     m_cachedGroup;  ///* Index of cached GAL display list corresponding to the item
+    ///* Helper for storing cached items group ids
+    typedef std::pair<int, int> GroupPair;
+
+    ///* Indexes of cached GAL display lists corresponding to the item (for every layer it occupies).
+    ///* (in the std::pair "first" stores layer number, "second" stores group id).
+    GroupPair* m_groups;
+    int        m_groupsSize;
+
+    /**
+     * Function getGroup()
+     * Returns number of the group id for the given layer, or -1 in case it was not cached before.
+     *
+     * @param aLayer is the layer number for which group id is queried.
+     * @return group id or -1 in case there is no group id (ie. item is not cached).
+     */
+    int getGroup( int aLayer ) const;
+
+    /**
+     * Function getAllGroups()
+     * Returns all group ids for the item (collected from all layers the item occupies).
+     *
+     * @return vector of group ids.
+     */
+    std::vector<int> getAllGroups() const;
+
+    /**
+     * Function setGroup()
+     * Sets a group id for the item and the layer combination.
+     *
+     * @param aLayer is the layer numbe.
+     * @param aGroup is the group id.
+     */
+    void setGroup( int aLayer, int aGroup );
+
+    /**
+     * Function deleteGroups()
+     * Removes all of the stored group ids. Forces recaching of the item.
+     */
+    void deleteGroups();
+
+    /**
+     * Function storesGroups()
+     * Returns information if the item uses at least one group id (ie. if it is cached at all).
+     *
+     * @returns true in case it is cached at least for one layer.
+     */
+    bool storesGroups() const;
 };
 } // namespace KiGfx