cogl-path: Allow changing the fill rule

This adds two new API calls- cogl_path_set_fill_rule and
cogl_path_get_fill_rule. This allows modifying the fill rule of the
current path. In addition to the previous default fill rule of
'even-odd' it now supports the 'non-zero' rule. The fill rule is a
property of the path (not the Cogl context) so creating a new path or
preserving a path with cogl_path_get_handle affects the fill rule.

doc/reference/cogl/Makefile.am

@@ -92,7 +92,8 @@ EXTRA_HFILES=
 # Images to copy into HTML directory.
 # e.g. HTML_IMAGES=$(top_srcdir)/gtk/stock-icons/stock_about_24.png
 HTML_IMAGES = \
-	fill-rule.png \
+	fill-rule-non-zero.png \
+	fill-rule-even-odd.png \
 	cogl_ortho.png
 
 # Extra SGML files that are included by $(DOC_MAIN_SGML_FILE).
@@ -122,5 +123,6 @@ include $(top_srcdir)/gtk-doc.make
 # e.g. EXTRA_DIST += version.xml.in
 
 EXTRA_DIST += \
-	fill-rule.png \
+	fill-rule-non-zero.png \
+	fill-rule-even-odd.png \
 	cogl_ortho.png

doc/reference/cogl/cogl-sections.txt

@@ -181,6 +181,9 @@ cogl_path_round_rectangle
 cogl_path_ellipse
 
 <SUBSECTION>
+CoglPathFillRule
+cogl_path_set_fill_rule
+cogl_path_get_fill_rule
 cogl_path_fill
 cogl_path_fill_preserve
 cogl_path_stroke