summaryrefslogtreecommitdiff
path: root/agg/source/agg_vcgen_markers_term.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'agg/source/agg_vcgen_markers_term.cpp')
-rwxr-xr-xagg/source/agg_vcgen_markers_term.cpp103
1 files changed, 103 insertions, 0 deletions
diff --git a/agg/source/agg_vcgen_markers_term.cpp b/agg/source/agg_vcgen_markers_term.cpp
new file mode 100755
index 000000000000..0daa40793764
--- /dev/null
+++ b/agg/source/agg_vcgen_markers_term.cpp
@@ -0,0 +1,103 @@
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+//
+// Terminal markers generator (arrowhead/arrowtail)
+//
+//----------------------------------------------------------------------------
+
+#include "agg_vcgen_markers_term.h"
+
+namespace agg
+{
+
+ //------------------------------------------------------------------------
+ void vcgen_markers_term::remove_all()
+ {
+ m_markers.remove_all();
+ }
+
+
+ //------------------------------------------------------------------------
+ void vcgen_markers_term::add_vertex(double x, double y, unsigned cmd)
+ {
+ if(is_move_to(cmd))
+ {
+ if(m_markers.size() & 1)
+ {
+ // Initial state, the first coordinate was added.
+ // If two of more calls of start_vertex() occures
+ // we just modify the last one.
+ m_markers.modify_last(coord_type(x, y));
+ }
+ else
+ {
+ m_markers.add(coord_type(x, y));
+ }
+ }
+ else
+ {
+ if(is_vertex(cmd))
+ {
+ if(m_markers.size() & 1)
+ {
+ // Initial state, the first coordinate was added.
+ // Add three more points, 0,1,1,0
+ m_markers.add(coord_type(x, y));
+ m_markers.add(m_markers[m_markers.size() - 1]);
+ m_markers.add(m_markers[m_markers.size() - 3]);
+ }
+ else
+ {
+ if(m_markers.size())
+ {
+ // Replace two last points: 0,1,1,0 -> 0,1,2,1
+ m_markers[m_markers.size() - 1] = m_markers[m_markers.size() - 2];
+ m_markers[m_markers.size() - 2] = coord_type(x, y);
+ }
+ }
+ }
+ }
+ }
+
+
+ //------------------------------------------------------------------------
+ void vcgen_markers_term::rewind(unsigned id)
+ {
+ m_curr_id = id * 2;
+ m_curr_idx = m_curr_id;
+ }
+
+
+ //------------------------------------------------------------------------
+ unsigned vcgen_markers_term::vertex(double* x, double* y)
+ {
+ if(m_curr_id > 2 || m_curr_idx >= m_markers.size())
+ {
+ return path_cmd_stop;
+ }
+ const coord_type& c = m_markers[m_curr_idx];
+ *x = c.x;
+ *y = c.y;
+ if(m_curr_idx & 1)
+ {
+ m_curr_idx += 3;
+ return path_cmd_line_to;
+ }
+ ++m_curr_idx;
+ return path_cmd_move_to;
+ }
+
+
+}