add stroke params to c api

include/c/sk_paint.h

Index: include/c/sk_paint.h
diff --git a/include/c/sk_paint.h b/include/c/sk_paint.h
index e6b5cbdb82661af41390a981635f060728b83b89..481147f1e55e77e06597ad56105773d752fef276 100644
--- a/include/c/sk_paint.h
+++ b/include/c/sk_paint.h
@@ -24,6 +24,35 @@ void sk_paint_set_antialias(sk_paint_t*, bool);
 sk_color_t sk_paint_get_color(const sk_paint_t*);
 void sk_paint_set_color(sk_paint_t*, sk_color_t);
 
+/* stroke settings */
+
+bool sk_paint_is_stroke(const sk_paint_t*);
+void sk_paint_set_stroke(sk_paint_t*, bool);
+
+float sk_paint_get_stroke_width(const sk_paint_t*);
+void sk_paint_set_stroke_width(sk_paint_t*, float width);
+
+float sk_paint_get_stroke_miter(const sk_paint_t*);
+void sk_paint_set_stroke_miter(sk_paint_t*, float miter);
+
+typedef enum {
+    BUTT_SK_STROKE_CAP,
+    ROUND_SK_STROKE_CAP,
+    SQUARE_SK_STROKE_CAP
+} sk_stroke_cap_t;
+
+sk_stroke_cap_t sk_paint_get_stroke_cap(const sk_paint_t*);
+void sk_paint_set_stroke_cap(sk_paint_t*, sk_stroke_cap_t);
+
+typedef enum {
+    MITER_SK_STROKE_JOIN,
+    ROUND_SK_STROKE_JOIN,
+    BEVEL_SK_STROKE_JOIN
+} sk_stroke_join_t;
+
+sk_stroke_join_t sk_paint_get_stroke_join(const sk_paint_t*);
+void sk_paint_set_stroke_join(sk_paint_t*, sk_stroke_join_t);
+
 /**
  *  Set the paint's shader to the specified parameter. This will automatically call unref() on
  *  any previous value, and call ref() on the new value.