LibHaru

Wt requires the following patch for libHaru to render arcs correctly. This patch has been tested against libhar 2.1.0 and 2.2.0

--- libharu-2.1.0/src/hpdf_page_operator.c    2008-05-27 20:23:31.000000000 +0200
+++ libharu-2.1.0-patched/src/hpdf_page_operator.c    2010-07-22 10:05:21.000000000 +0200
@@ -2192,7 +2192,7 @@

     HPDF_PTRACE ((" HPDF_Page_Arc\n"));

-    if (ang1 >= ang2 || (ang2 - ang1) >= 360)
+    if (fabs(ang2 - ang1) >= 360)
         HPDF_RaiseError (page->error, HPDF_PAGE_OUT_OF_RANGE, 0);

     if (ret != HPDF_OK)
@@ -2205,10 +2205,10 @@

     for (;;) {
-        if (ang2 - ang1 <= 90)
+        if (fabs(ang2 - ang1) <= 90)
             return InternalArc (page, x, y, ray, ang1, ang2, cont_flg);
         else {
-            HPDF_REAL tmp_ang = ang1 + 90;
+        HPDF_REAL tmp_ang = (ang2 > ang1 ? ang1 + 90 : ang1 - 90);

             if ((ret = InternalArc (page, x, y, ray, ang1, tmp_ang, cont_flg))
                     != HPDF_OK)
@@ -2217,7 +2217,7 @@
             ang1 = tmp_ang;
         }

-        if (ang1 >= ang2)
+        if (fabs(ang1 - ang2) < 0.1)
             break;

         cont_flg = HPDF_TRUE;
@@ -2280,7 +2280,11 @@
         pbuf = HPDF_FToA (pbuf, (HPDF_REAL)x0, eptr);
         *pbuf++ = ' ';
         pbuf = HPDF_FToA (pbuf, (HPDF_REAL)y0, eptr);
-        pbuf = (char *)HPDF_StrCpy (pbuf, " m\012", eptr);
+
+    if (attr->gmode == HPDF_GMODE_PATH_OBJECT)
+      pbuf = (char *)HPDF_StrCpy (pbuf, " l\012", eptr);
+    else
+      pbuf = (char *)HPDF_StrCpy (pbuf, " m\012", eptr);
     }

     pbuf = HPDF_FToA (pbuf, (HPDF_REAL)x1, eptr);