--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Toolbox/DebugDrawing2D.cpp	Fri Sep 27 22:14:36 2024 +0200
@@ -0,0 +1,160 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2023 Osimis S.A., Belgium
+ * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "DebugDrawing2D.h"
+
+
+namespace OrthancStone
+{
+  class DebugDrawing2D::Segment
+  {
+  private:
+    double       x1_;
+    double       y1_;
+    double       x2_;
+    double       y2_;
+    std::string  color_;
+    bool         arrow_;
+
+  public:
+    Segment(double x1,
+            double y1,
+            double x2,
+            double y2,
+            const std::string& color,
+            bool arrow) :
+      x1_(x1),
+      y1_(y1),
+      x2_(x2),
+      y2_(y2),
+      color_(color),
+      arrow_(arrow)
+    {
+    }
+
+    double GetX1() const
+    {
+      return x1_;
+    }
+
+    double GetY1() const
+    {
+      return y1_;
+    }
+
+    double GetX2() const
+    {
+      return x2_;
+    }
+
+    double GetY2() const
+    {
+      return y2_;
+    }
+
+    const std::string& GetColor() const
+    {
+      return color_;
+    }
+
+    bool IsArrow() const
+    {
+      return arrow_;
+    }
+  };
+
+
+  void DebugDrawing2D::AddSegment(double x1,
+                                  double y1,
+                                  double x2,
+                                  double y2,
+                                  const std::string& color,
+                                  bool arrow,
+                                  bool addToExtent)
+  {
+    if (addToExtent)
+    {
+      extent_.AddPoint(x1, y1);
+      extent_.AddPoint(x2, y2);
+    }
+
+    segments_.push_back(Segment(x1, y1, x2, y2, color, arrow));
+  }
+
+
+  void DebugDrawing2D::SaveSvg(const std::string& path)
+  {
+    // Size in pixels
+    float ww, hh;
+    if (extent_.IsEmpty())
+    {
+      ww = 2048.0f;
+      hh = 2048.0f;
+    }
+    else if (extent_.GetWidth() > extent_.GetHeight())
+    {
+      ww = 2048.0f;
+      hh = ww * extent_.GetHeight() / extent_.GetWidth();
+    }
+    else
+    {
+      hh = 2048.0f;
+      ww = hh * extent_.GetWidth() / extent_.GetHeight();
+    }
+
+    FILE* fp = fopen(path.c_str(), "w");
+    fprintf(fp, "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n");
+    fprintf(fp, "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
+    fprintf(fp, "<svg width=\"%f\" height=\"%f\" viewBox=\"0 0 %f %f\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n", ww, hh, extent_.GetWidth(), extent_.GetHeight());
+
+    // http://thenewcode.com/1068/Making-Arrows-in-SVG
+    fprintf(fp, "<defs>\n");
+    fprintf(fp, "<marker id=\"arrowhead\" markerWidth=\"2\" markerHeight=\"3\" \n");
+    fprintf(fp, "refX=\"2\" refY=\"1.5\" orient=\"auto\">\n");
+    fprintf(fp, "<polygon points=\"0 0, 2 1.5, 0 3\" />\n");
+    fprintf(fp, "</marker>\n");
+    fprintf(fp, "</defs>\n");
+
+    fprintf(fp, "<rect fill=\"#fff\" stroke=\"#000\" x=\"0\" y=\"0\" width=\"%f\" height=\"%f\"/>\n", extent_.GetWidth(), extent_.GetHeight());
+
+    for (std::list<Segment>::const_iterator it = segments_.begin(); it != segments_.end(); ++it)
+    {
+      float strokeWidth = 0.1;
+
+      std::string s;
+      if (it->IsArrow())
+      {
+        s = "marker-end=\"url(#arrowhead)\"";
+      }
+
+      fprintf(fp, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke=\"%s\" stroke-width=\"%f\" %s/>\n",
+              it->GetX1() - extent_.GetX1(), it->GetY1() - extent_.GetY1(),
+              it->GetX2() - extent_.GetX1(), it->GetY2() - extent_.GetY1(),
+              it->GetColor().c_str(), strokeWidth, s.c_str());
+    }
+
+    fprintf(fp, "</svg>\n");
+
+    fclose(fp);
+  }
+}