WIP: SVG import & rasterization

Updated AntiGrain (agg) library to 2.5
Added agg_svg library from AntiGrain 2.5
added src/slic3r/Utils/SVGImport.cpp/hpp

src/agg/agg_vcgen_stroke.h

@@ -0,0 +1,111 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry (AGG) - Version 2.5
+// A high quality rendering engine for C++
+// Copyright (C) 2002-2006 Maxim Shemanarev
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://antigrain.com
+// 
+// AGG is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+// 
+// AGG is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with AGG; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
+// MA 02110-1301, USA.
+//----------------------------------------------------------------------------
+
+#ifndef AGG_VCGEN_STROKE_INCLUDED
+#define AGG_VCGEN_STROKE_INCLUDED
+
+#include "agg_math_stroke.h"
+
+
+namespace agg
+{
+
+    //============================================================vcgen_stroke
+    //
+    // See Implementation agg_vcgen_stroke.cpp
+    // Stroke generator
+    //
+    //------------------------------------------------------------------------
+    class vcgen_stroke
+    {
+        enum status_e
+        {
+            initial,
+            ready,
+            cap1,
+            cap2,
+            outline1,
+            close_first,
+            outline2,
+            out_vertices,
+            end_poly1,
+            end_poly2,
+            stop
+        };
+
+    public:
+        typedef vertex_sequence<vertex_dist, 6> vertex_storage;
+        typedef pod_bvector<point_d, 6>         coord_storage;
+
+        vcgen_stroke();
+
+        void line_cap(line_cap_e lc)     { m_stroker.line_cap(lc); }
+        void line_join(line_join_e lj)   { m_stroker.line_join(lj); }
+        void inner_join(inner_join_e ij) { m_stroker.inner_join(ij); }
+
+        line_cap_e   line_cap()   const { return m_stroker.line_cap(); }
+        line_join_e  line_join()  const { return m_stroker.line_join(); }
+        inner_join_e inner_join() const { return m_stroker.inner_join(); }
+
+        void width(double w) { m_stroker.width(w); }
+        void miter_limit(double ml) { m_stroker.miter_limit(ml); }
+        void miter_limit_theta(double t) { m_stroker.miter_limit_theta(t); }
+        void inner_miter_limit(double ml) { m_stroker.inner_miter_limit(ml); }
+        void approximation_scale(double as) { m_stroker.approximation_scale(as); }
+
+        double width() const { return m_stroker.width(); }
+        double miter_limit() const { return m_stroker.miter_limit(); }
+        double inner_miter_limit() const { return m_stroker.inner_miter_limit(); }
+        double approximation_scale() const { return m_stroker.approximation_scale(); }
+
+        void shorten(double s) { m_shorten = s; }
+        double shorten() const { return m_shorten; }
+
+        // Vertex Generator Interface
+        void remove_all();
+        void add_vertex(double x, double y, unsigned cmd);
+
+        // Vertex Source Interface
+        void     rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        vcgen_stroke(const vcgen_stroke&);
+        const vcgen_stroke& operator = (const vcgen_stroke&);
+
+        math_stroke<coord_storage> m_stroker;
+        vertex_storage             m_src_vertices;
+        coord_storage              m_out_vertices;
+        double                     m_shorten;
+        unsigned                   m_closed;
+        status_e                   m_status;
+        status_e                   m_prev_status;
+        unsigned                   m_src_vertex;
+        unsigned                   m_out_vertex;
+    };
+
+
+}
+
+#endif