[Plplot-cvs] SF.net SVN: plplot:[9932] trunk/drivers/cairo.c

[<and...@us...>]

Revision: 9932
          http://plplot.svn.sourceforge.net/plplot/?rev=9932&view=rev
Author:   andrewross
Date:     2009-05-06 11:18:25 +0000 (Wed, 06 May 2009)

Log Message:
-----------
ANR for HMC. Only apply cairo anti-aliasing improvements when anti-aliasing is enabled. This speeds up rendering on non-anti-alised surfaces.

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

Modified: trunk/drivers/cairo.c
===================================================================
--- trunk/drivers/cairo.c	2009-05-06 10:48:26 UTC (rev 9931)
+++ trunk/drivers/cairo.c	2009-05-06 11:18:25 UTC (rev 9932)
@@ -1021,7 +1021,8 @@
   PLCairo *aStream;
   cairo_line_join_t old_line_join;
   cairo_line_cap_t old_line_cap;
- 
+  cairo_antialias_t aa_state;
+
   aStream = (PLCairo *)pls->dev;
 
   /* Save the previous line drawing style */
@@ -1039,9 +1040,12 @@
       (double)pls->curcolor.g/255.0,
       (double)pls->curcolor.b/255.0,
       (double)pls->curcolor.a);
-  cairo_set_line_width(aStream->cairoContext, 1.0);
-  if(pls->curcolor.a>0.99) {
+  aa_state = cairo_get_antialias(aStream->cairoContext);
+  /* Add an extra outline stroke to the polygon unless the plotting color is
+     not opaque or antialiasing is disabled. */
+  if((pls->curcolor.a > 0.99) || (aa_state != CAIRO_ANTIALIAS_NONE)) {
     cairo_fill_preserve(aStream->cairoContext);
+    cairo_set_line_width(aStream->cairoContext, 1.0);
     cairo_stroke(aStream->cairoContext);
   } else
     cairo_fill(aStream->cairoContext);


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