--- a/src/redraw_man.c	Wed Nov 24 16:17:17 2010 +0800
+++ b/src/redraw_man.c	Sun Nov 28 12:07:37 2010 +0800
@@ -304,6 +304,38 @@
 #define ASSERT(x)
 #endif
 
+/*
+ * Conitions for coords.
+ */
+#define coord_is_cached(co) ((co)->flags & COF_OWN_CANVAS)
+#define coord_is_always_cached(co) ((co)->flags & COF_ALWAYS_CACHE)
+#define coord_is_fast_cached(co) ((co)->flags & COF_FAST_MASK)
+#define coord_is_precise_cached(co) ((co)->flags & COF_PRECISE_MASK)
+#define coord_is_zeroing(co) ((co)->flags & COF_MUST_ZEROING)
+#define coord_set_zeroing(co) \
+    do { (co)->flags |= COF_MUST_ZEROING; } while(0)
+#define coord_clear_zeroing(co) \
+    do { (co)->flags &= ~COF_MUST_ZEROING; } while(0)
+#define coord_set_flags(co, _flags)		\
+    do { (co)->flags |= (_flags); } while(0)
+#define coord_get_parent(co) ((co)->parent)
+#define coord_get_flags(co, _flags) ((co)->flags & (_flags))
+#define coord_clear_flags(co, _flags)		\
+    do { (co)->flags &= ~(_flags); } while(0)
+
+#define coord_get_pcache_area(coord) ((coord)->canvas_info->pcache_cur_area)
+#define coord_get_pcache_last_area(coord)	\
+    ((coord)->canvas_info->pcache_last_area)
+#define coord_get_cached(coord) ((coord)->canvas_info->owner)
+#define _coord_get_dirty_areas(coord) (&(coord)->canvas_info->dirty_areas)
+#define _coord_get_aggr_dirty_areas(coord)	\
+    ((coord)->canvas_info->aggr_dirty_areas)
+#define coord_get_2pdev(coord) ((coord)->canvas_info->cache_2_pdev)
+#define coord_get_2pdev_rev(coord) ((coord)->canvas_info->cache_2_pdev_rev)
+#define coord_get_aggr2pdev(coord) ((coord)->canvas_info->aggr_2_pdev)
+#define coord_get_aggr2pdev_rev(coord) ((coord)->canvas_info->aggr_2_pdev_rev)
+
+
 /* NOTE: bounding box should also consider width of stroke.
  */