add SkEvalCubicInterval

git-svn-id: http://skia.googlecode.com/svn/trunk@416 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 16 insertions, 0 deletions

diff --git a/include/utils/SkCubicInterval.h b/include/utils/SkCubicInterval.h
new file mode 100644
index 0000000000..bd6fc5ff9d
--- /dev/null
+++ b/include/utils/SkCubicInterval.h
@@ -0,0 +1,16 @@
+#ifndef SkCubicInterval_DEFINED
+#define SkCubicInterval_DEFINED
+
+#include "SkPoint.h"
+
+SkScalar SkEvalCubicInterval(SkScalar x1, SkScalar y1,
+                             SkScalar x2, SkScalar y2,
+                             SkScalar unitX);
+
+static inline SkScalar SkEvalCubicInterval(const SkPoint pts[2], SkScalar x) {
+    return SkEvalCubicInterval(pts[0].fX, pts[0].fY,
+                               pts[1].fX, pts[1].fY, x);
+}
+
+#endif
+