Merge to XFA: Separate agg-authored code from fx-authored code.

Original Review URL: https://codereview.chromium.org/1152743007.
BUG=pdfium:166
R=brucedawson@chromium.org, thestig@chromium.org
TBR=brucedawson@chromium.org, thestig@chromium.org

Review URL: https://codereview.chromium.org/1186423003.

1 files changed, 75 insertions, 0 deletions

diff --git a/third_party/agg23/agg_vcgen_dash.h b/third_party/agg23/agg_vcgen_dash.h
new file mode 100644
index 0000000000..9c3aa630c2
--- /dev/null
+++ b/third_party/agg23/agg_vcgen_dash.h
@@ -0,0 +1,75 @@
+
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+//
+// Line dash generator
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_VCGEN_DASH_INCLUDED
+#define AGG_VCGEN_DASH_INCLUDED
+#include "agg_basics.h"
+#include "agg_vertex_sequence.h"
+namespace agg
+{
+class vcgen_dash 
+{
+    enum max_dashes_e {
+        max_dashes = 32
+    };
+    enum status_e {
+        initial,
+        ready,
+        polyline,
+        stop
+    };
+public:
+    typedef vertex_sequence<vertex_dist, 6> vertex_storage;
+    vcgen_dash();
+    void remove_all_dashes();
+    void add_dash(FX_FLOAT dash_len, FX_FLOAT gap_len);
+    void dash_start(FX_FLOAT ds);
+    void shorten(FX_FLOAT s)
+    {
+        m_shorten = s;
+    }
+    double shorten() const
+    {
+        return m_shorten;
+    }
+    void remove_all();
+    void add_vertex(FX_FLOAT x, FX_FLOAT y, unsigned cmd);
+    void     rewind(unsigned path_id);
+    unsigned vertex(FX_FLOAT* x, FX_FLOAT* y);
+private:
+    vcgen_dash(const vcgen_dash&);
+    const vcgen_dash& operator = (const vcgen_dash&);
+    void calc_dash_start(FX_FLOAT ds);
+    FX_FLOAT     m_dashes[max_dashes];
+    FX_FLOAT		m_total_dash_len;
+    unsigned        m_num_dashes;
+    FX_FLOAT     m_dash_start;
+    FX_FLOAT     m_shorten;
+    FX_FLOAT     m_curr_dash_start;
+    unsigned        m_curr_dash;
+    FX_FLOAT     m_curr_rest;
+    const vertex_dist* m_v1;
+    const vertex_dist* m_v2;
+    vertex_storage m_src_vertices;
+    unsigned       m_closed;
+    status_e       m_status;
+    unsigned       m_src_vertex;
+};
+}
+#endif