[Plplot-cvs] SF.net SVN: plplot:[9877] trunk/drivers/cairo.c

[<hba...@us...>]

Revision: 9877
          http://plplot.svn.sourceforge.net/plplot/?rev=9877&view=rev
Author:   hbabcock
Date:     2009-05-02 03:23:13 +0000 (Sat, 02 May 2009)

Log Message:
-----------
HPB for HMC. Change the line style for filled polygons so that render more smoothly.

Modified Paths:
--------------
    trunk/drivers/cairo.c

Modified: trunk/drivers/cairo.c
===================================================================
--- trunk/drivers/cairo.c	2009-05-02 00:31:19 UTC (rev 9876)
+++ trunk/drivers/cairo.c	2009-05-02 03:23:13 UTC (rev 9877)
@@ -988,9 +988,18 @@
 {
   int i;
   PLCairo *aStream;
-
+  cairo_line_join_t old_line_join;
+  cairo_line_cap_t old_line_cap;
+ 
   aStream = (PLCairo *)pls->dev;
 
+  /* Save the previous line drawing style */
+  old_line_cap = cairo_get_line_cap(aStream->cairoContext);
+  old_line_join = cairo_get_line_join(aStream->cairoContext);
+  cairo_set_line_cap(aStream->cairoContext, CAIRO_LINE_CAP_BUTT);
+  cairo_set_line_join(aStream->cairoContext, CAIRO_LINE_JOIN_BEVEL);
+
+  /* Draw the polygons */
   cairo_move_to(aStream->cairoContext, aStream->downscale * (double) xa[0], aStream->downscale * (double) ya[0]);
   for(i=1;i<npts;i++)
     cairo_line_to(aStream->cairoContext, aStream->downscale * (double) xa[i], aStream->downscale * (double) ya[i]);
@@ -1005,6 +1014,10 @@
     cairo_stroke(aStream->cairoContext);
   } else
     cairo_fill(aStream->cairoContext);
+
+  /* Restore the previous line drawing style */
+  cairo_set_line_cap(aStream->cairoContext, old_line_cap);
+  cairo_set_line_join(aStream->cairoContext, old_line_join);
 }
 
 /*---------------------------------------------------------------------
@@ -2051,4 +2064,3 @@
 }
 
 #endif
-


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