[dia] Bug 607655 - Arcs are badly exported (sometimes)

[Hans Breuer <hans src gnome org>]

commit 364517a6c6eb91e89764aee689196210d3bc399e
Author: Hans Breuer <hans breuer org>
Date:   Sun Jan 24 21:06:39 2010 +0100

    Bug 607655 - Arcs are badly exported (sometimes)
    
    The large-arc flag was not correctly calculated for angle1>angle2

 lib/diasvgrenderer.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/lib/diasvgrenderer.c b/lib/diasvgrenderer.c
index fd10f13..94fd431 100644
--- a/lib/diasvgrenderer.c
+++ b/lib/diasvgrenderer.c
@@ -420,7 +420,7 @@ draw_arc(DiaRenderer *self,
   real ex=center->x + rx*cos(angle2*G_PI/180);
   real ey=center->y - ry*sin(angle2*G_PI/180);
   int swp = 0; /* always drawin negative direction */
-  int large_arc = (angle2 - angle1 >= 180);
+  int large_arc; 
   gchar sx_buf[DTOSTR_BUF_SIZE];
   gchar sy_buf[DTOSTR_BUF_SIZE];
   gchar rx_buf[DTOSTR_BUF_SIZE];
@@ -428,6 +428,10 @@ draw_arc(DiaRenderer *self,
   gchar ex_buf[DTOSTR_BUF_SIZE];
   gchar ey_buf[DTOSTR_BUF_SIZE];
 
+  if (angle1 > angle2)
+    angle2 += 360;
+  large_arc = (angle2 - angle1 >= 180);
+
   node = xmlNewChild(renderer->root, renderer->svg_name_space, (const xmlChar *)"path", NULL);
   
   xmlSetProp(node, (const xmlChar *)"style", (xmlChar *) get_draw_style(renderer, colour));