app_server & interface kit: support fill rules.

* BView gets SetFillRule/FillRule methods. The fill rule is part of the
view state.
* The B_NONZERO rule is the default. This is what we implemented before.
* The B_EVEN_ODD rule is the other common possibility for this, and
we need to support it to help WebKit to render properly.

headers/private/interface/ViewPrivate.h

@@ -40,8 +40,9 @@ enum {
 	B_VIEW_VIEW_COLOR_BIT		= 0x00010000,
 	B_VIEW_PATTERN_BIT			= 0x00020000,
 	B_VIEW_TRANSFORM_BIT		= 0x00040000,
+	B_VIEW_FILL_RULE_BIT		= 0x00080000,
 
-	B_VIEW_ALL_BITS				= 0x0007ffff,
+	B_VIEW_ALL_BITS				= 0x000fffff,
 
 	// these used for archiving only
 	B_VIEW_RESIZE_BIT			= 0x00001000,
@@ -123,6 +124,9 @@ class ViewState {
 		cap_mode			line_cap;
 		float				miter_limit;
 
+		// fill rule
+		int32				fill_rule;
+
 		// alpha blending
 		source_alpha		alpha_source_mode;
 		alpha_function		alpha_function_mode;