Initial commit.
diff --git a/core/src/fxge/agg/agg23/agg_vertex_sequence.h b/core/src/fxge/agg/agg23/agg_vertex_sequence.h
new file mode 100644
index 0000000..29486d4
--- /dev/null
+++ b/core/src/fxge/agg/agg23/agg_vertex_sequence.h
@@ -0,0 +1,100 @@
+
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+// mcseemagg@yahoo.com
+// http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// vertex_sequence container and vertex_dist struct
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_VERTEX_SEQUENCE_INCLUDED
+#define AGG_VERTEX_SEQUENCE_INCLUDED
+#include "agg_basics.h"
+#include "agg_array.h"
+#include "agg_math.h"
+namespace agg
+{
+template<class T, unsigned S = 6>
+class vertex_sequence : public pod_deque<T, S>
+{
+public:
+ typedef pod_deque<T, S> base_type;
+ void add(const T& val);
+ void modify_last(const T& val);
+ void close(bool remove_flag);
+};
+template<class T, unsigned S>
+void vertex_sequence<T, S>::add(const T& val)
+{
+ if(base_type::size() > 1) {
+ if(!(*this)[base_type::size() - 2]((*this)[base_type::size() - 1])) {
+ base_type::remove_last();
+ }
+ }
+ base_type::add(val);
+}
+template<class T, unsigned S>
+void vertex_sequence<T, S>::modify_last(const T& val)
+{
+ base_type::remove_last();
+ add(val);
+}
+template<class T, unsigned S>
+void vertex_sequence<T, S>::close(bool closed)
+{
+ while(base_type::size() > 1) {
+ if((*this)[base_type::size() - 2]((*this)[base_type::size() - 1])) {
+ break;
+ }
+ T t = (*this)[base_type::size() - 1];
+ base_type::remove_last();
+ modify_last(t);
+ }
+ if(closed) {
+ while(base_type::size() > 1) {
+ if((*this)[base_type::size() - 1]((*this)[0])) {
+ break;
+ }
+ base_type::remove_last();
+ }
+ }
+}
+const FX_FLOAT vertex_dist_epsilon = 1e-14f;
+struct vertex_dist : public CFX_Object {
+ FX_FLOAT x;
+ FX_FLOAT y;
+ FX_FLOAT dist;
+ vertex_dist() {}
+ vertex_dist(FX_FLOAT x_, FX_FLOAT y_) :
+ x(x_),
+ y(y_),
+ dist(0)
+ {
+ }
+ bool operator () (const vertex_dist& val)
+ {
+ bool ret = (dist = calc_distance(x, y, val.x, val.y)) > vertex_dist_epsilon;
+ return ret;
+ }
+};
+struct vertex_dist_cmd : public vertex_dist {
+ unsigned cmd;
+ vertex_dist_cmd() {}
+ vertex_dist_cmd(FX_FLOAT x_, FX_FLOAT y_, unsigned cmd_) :
+ vertex_dist(x_, y_),
+ cmd(cmd_)
+ {
+ }
+};
+}
+#endif