add newImage API

include/core/SkFilterQuality.h

Index: include/core/SkFilterQuality.h
diff --git a/include/core/SkFilterQuality.h b/include/core/SkFilterQuality.h
new file mode 100644
index 0000000000000000000000000000000000000000..db0597e697dd045d917169f42e1fe8498b87a907
--- /dev/null
+++ b/include/core/SkFilterQuality.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkFilterQuality_DEFINED
+#define SkFilterQuality_DEFINED
+
+#include "SkTypes.h"
+
+/**
+ *  Controls how much filtering to be done when scaling/transforming complex colors
+ *  e.g. images
+ */
+enum SkFilterQuality {
+    kNone_SkFilterQuality,      //!< fastest but lowest quality, typically nearest-neighbor
+    kLow_SkFilterQuality,       //!< typically bilerp
+    kMedium_SkFilterQuality,    //!< typically bilerp + mipmaps for down-scaling
+    kHigh_SkFilterQuality       //!< slowest but highest quality, typically bicubic or better
+};
+
+#endif