add maskfilter to c api

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/822053002

3 files changed, 39 insertions, 0 deletions

diff --git a/include/c/sk_maskfilter.h b/include/c/sk_maskfilter.h
new file mode 100644
index 0000000000..ce38605a85
--- /dev/null
+++ b/include/c/sk_maskfilter.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
+// DO NOT USE -- FOR INTERNAL TESTING ONLY
+
+#ifndef sk_maskfilter_DEFINED
+#define sk_maskfilter_DEFINED
+
+#include "sk_types.h"
+
+typedef enum {
+    NORMAL_SK_BLUR_STYLE,   //!< fuzzy inside and outside
+    SOLID_SK_BLUR_STYLE,    //!< solid inside, fuzzy outside
+    OUTER_SK_BLUR_STYLE,    //!< nothing inside, fuzzy outside
+    INNER_SK_BLUR_STYLE,    //!< fuzzy inside, nothing outside
+} sk_blurstyle_t;
+
+SK_C_PLUS_PLUS_BEGIN_GUARD
+
+void sk_maskfilter_ref(sk_maskfilter_t*);
+void sk_maskfilter_unref(sk_maskfilter_t*);
+
+sk_maskfilter_t* sk_maskfilter_new_blur(sk_blurstyle_t, float sigma);
+
+SK_C_PLUS_PLUS_END_GUARD
+
+#endif
diff --git a/include/c/sk_paint.h b/include/c/sk_paint.h
index 92ac5d57ba..e6b5cbdb82 100644
--- a/include/c/sk_paint.h
+++ b/include/c/sk_paint.h
@@ -30,6 +30,12 @@ void sk_paint_set_color(sk_paint_t*, sk_color_t);
  */
 void sk_paint_set_shader(sk_paint_t*, sk_shader_t*);
 
+/**
+ *  Set the paint's maskfilter to the specified parameter. This will automatically call unref() on
+ *  any previous value, and call ref() on the new value.
+ */
+void sk_paint_set_maskfilter(sk_paint_t*, sk_maskfilter_t*);
+
 SK_C_PLUS_PLUS_END_GUARD
 
 #endif
diff --git a/include/c/sk_types.h b/include/c/sk_types.h
index f5f4b578fc..67a29dcb5e 100644
--- a/include/c/sk_types.h
+++ b/include/c/sk_types.h
@@ -80,6 +80,7 @@ typedef struct {
 
 typedef struct sk_canvas_t sk_canvas_t;
 typedef struct sk_image_t sk_image_t;
+typedef struct sk_maskfilter_t sk_maskfilter_t;
 typedef struct sk_paint_t sk_paint_t;
 typedef struct sk_picture_t sk_picture_t;
 typedef struct sk_picture_recorder_t sk_picture_recorder_t;