1 files changed, 78 insertions, 0 deletions
diff --git a/src/Updates.cxx b/src/Updates.cxx
new file mode 100644
index 0000000..49f69d5
--- /dev/null
+++ b/src/Updates.cxx
@@ -0,0 +1,78 @@
+namespace PluggIt {
+
+class Updates
+{
+     private DFBUpdates  m_updates;
+     private DFBRegion  *m_regions;
+
+     public Updates( unsigned int max_regions = 8 ) {
+          m_regions = (DFBRegion*) D_CALLOC( max_regions ?: 1, sizeof(DFBRegion) );
+
+          dfb_updates_init( &m_updates, m_regions, max_regions );
+     }
+
+     virtual ~Updates() {
+          dfb_updates_deinit( &m_updates );
+
+          D_FREE( m_regions );
+     }
+
+
+     public void addRegion( const DFBRegion &region ) {
+          dfb_updates_add( &m_updates, &region );
+     }
+
+     public DFBRegion bounding() const {
+          return m_updates.bounding;
+     }
+
+     public void get_rectangles( DFBRectangle *ret_rects, int *ret_num ) {
+          dfb_updates_get_rectangles( &m_updates, ret_rects, ret_num );
+     }
+
+     public unsigned int num_regions() const {
+          return m_updates.num_regions;
+     }
+
+     public void reset() {
+          dfb_updates_reset( &m_updates );
+     }
+
+
+     public void GetRectangles( vector<DFBRectangle_C> &rects ) {
+          D_MAGIC_ASSERT( &m_updates, DFBUpdates );
+          D_ASSERT( m_updates.regions != NULL );
+          D_ASSERT( m_updates.num_regions >= 0 );
+          D_ASSERT( m_updates.num_regions <= m_updates.max_regions );
+
+          switch (m_updates.num_regions) {
+               case 0:
+                    break;
+
+               default: {
+                    int n, d, total, bounding;
+
+                    dfb_updates_stat( &m_updates, &total, &bounding );
+
+                    n = m_updates.max_regions - m_updates.num_regions + 1;
+                    d = n + 1;
+
+                    /* Try to optimize updates. Use individual regions only if not too much overhead. */
+                    if (total < bounding * n / d) {
+                         for (n=0; n<m_updates.num_regions; n++)
+                              rects.push_back( DFBRectangle( m_updates.regions[n] ) );
+
+                         break;
+                    }
+               }
+               /* fall through */
+
+               case 1:
+                    rects.push_back( DFBRectangle( m_updates.bounding ) );
+                    break;
+          }
+     }
+};
+
+}
+