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authorTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
committerTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
commitb7d358b498800e4c240d381fa6f098af17a4d95b (patch)
treeaa0d8677af748caf9881ecd011af2b00af925188 /third_party/agg23/agg_shorten_path.h
parent9555022ee550ee97415a86957686cc28716c4dee (diff)
downloadpdfium-b7d358b498800e4c240d381fa6f098af17a4d95b.tar.xz
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.
Diffstat (limited to 'third_party/agg23/agg_shorten_path.h')
-rw-r--r--third_party/agg23/agg_shorten_path.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/agg23/agg_shorten_path.h b/third_party/agg23/agg_shorten_path.h
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+++ b/third_party/agg23/agg_shorten_path.h
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+
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+#ifndef AGG_SHORTEN_PATH_INCLUDED
+#define AGG_SHORTEN_PATH_INCLUDED
+#include "agg_basics.h"
+#include "agg_vertex_sequence.h"
+namespace agg
+{
+template<class VertexSequence>
+void shorten_path(VertexSequence& vs, FX_FLOAT s, unsigned closed = 0)
+{
+ typedef typename VertexSequence::value_type vertex_type;
+ if(s > 0 && vs.size() > 1) {
+ FX_FLOAT d;
+ int n = int(vs.size() - 2);
+ while(n) {
+ d = vs[n].dist;
+ if(d > s) {
+ break;
+ }
+ vs.remove_last();
+ s -= d;
+ --n;
+ }
+ if(vs.size() < 2) {
+ vs.remove_all();
+ } else {
+ n = vs.size() - 1;
+ vertex_type& prev = vs[n - 1];
+ vertex_type& last = vs[n];
+ d = (prev.dist - s) / prev.dist;
+ FX_FLOAT x = prev.x + (last.x - prev.x) * d;
+ FX_FLOAT y = prev.y + (last.y - prev.y) * d;
+ last.x = x;
+ last.y = y;
+ if(!prev(last)) {
+ vs.remove_last();
+ }
+ vs.close(closed != 0);
+ }
+ }
+}
+}
+#endif