From 2717303e39af1fe525a83dc8e8e81bea8d5459eb Mon Sep 17 00:00:00 2001
From: buliabyak <buliabyak@users.sourceforge.net>
Date: Fri, 26 May 2006 04:48:38 +0000
Subject: [PATCH] method for dashing Path using an SPStyle

---
 src/livarot/Path.h          |  4 ++++
 src/livarot/PathCutting.cpp | 31 +++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/src/livarot/Path.h b/src/livarot/Path.h
index 291d8f157..8d7fd0a7e 100644
--- a/src/livarot/Path.h
+++ b/src/livarot/Path.h
@@ -15,6 +15,8 @@
 #include "libnr/nr-point.h"
 #include <libnr/nr-rect-l.h>
 
+struct SPStyle;
+
 /*
  * the Path class: a structure to hold path description and their polyline approximation (not kept in sync)
  * the path description is built with regular commands like MoveTo() LineTo(), etc
@@ -170,6 +172,8 @@ public:
   // dash the polyline
   // the result is stored in the polyline, so you lose the original. make a copy before if needed
   void  DashPolyline(float head,float tail,float body,int nbD,float *dashs,bool stPlain,float stOffset);
+
+  void  DashPolylineFromStyle(SPStyle *style, float scale, float min_len);
   
   //utilitaire pour inkscape
   void  LoadArtBPath(void *iP,NR::Matrix const &tr,bool doTransformation);
diff --git a/src/livarot/PathCutting.cpp b/src/livarot/PathCutting.cpp
index f21e02820..59de29676 100644
--- a/src/livarot/PathCutting.cpp
+++ b/src/livarot/PathCutting.cpp
@@ -14,6 +14,7 @@
  */
 
 #include "Path.h"
+#include "style.h"
 #include "livarot/path-description.h"
 #include "libnr/n-art-bpath.h"
 #include "libnr/nr-point-matrix-ops.h"
@@ -44,6 +45,36 @@ void  Path::DashPolyline(float head,float tail,float body,int nbD,float *dashs,b
   }
 }
 
+void  Path::DashPolylineFromStyle(SPStyle *style, float scale, float min_len)
+{
+    if (style->stroke_dash.n_dash) {
+
+        double dlen = 0.0;
+        for (int i = 0; i < style->stroke_dash.n_dash; i++) {
+            dlen += style->stroke_dash.dash[i] * scale;
+        }
+        if (dlen >= min_len) {
+            NRVpathDash dash;
+            dash.offset = style->stroke_dash.offset * scale;
+            dash.n_dash = style->stroke_dash.n_dash;
+            dash.dash = g_new(double, dash.n_dash);
+            for (int i = 0; i < dash.n_dash; i++) {
+                dash.dash[i] = style->stroke_dash.dash[i] * scale;
+            }
+            int    nbD=dash.n_dash;
+            float  *dashs=(float*)malloc((nbD+1)*sizeof(float));
+            while ( dash.offset >= dlen ) dash.offset-=dlen;
+            dashs[0]=dash.dash[0];
+            for (int i=1; i<nbD; i++) {
+                dashs[i]=dashs[i-1]+dash.dash[i];
+            }
+            // modulo dlen
+            this->DashPolyline(0.0, 0.0, dlen, nbD, dashs, true, dash.offset);
+            free(dashs);
+            g_free(dash.dash);
+        }
+    }
+}
 
 
 void Path::DashSubPath(int spL, int spP, std::vector<path_lineto> const &orig_pts, float head,float tail,float body,int nbD,float *dashs,bool stPlain,float stOffset)
-- 
2.30.2