grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 58 insertions, 0 deletions

diff --git a/include/effects/SkBlurMaskFilter.h b/include/effects/SkBlurMaskFilter.h
new file mode 100644
index 0000000000..b90ea5e49e
--- /dev/null
+++ b/include/effects/SkBlurMaskFilter.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SkBlurMaskFilter_DEFINED
+#define SkBlurMaskFilter_DEFINED
+
+// we include this since our callers will need to at least be able to ref/unref
+#include "SkMaskFilter.h"
+#include "SkScalar.h"
+
+class SkBlurMaskFilter {
+public:
+    enum BlurStyle {
+        kNormal_BlurStyle,  //!< fuzzy inside and outside
+        kSolid_BlurStyle,   //!< solid inside, fuzzy outside
+        kOuter_BlurStyle,   //!< nothing inside, fuzzy outside
+        kInner_BlurStyle,   //!< fuzzy inside, nothing outside
+
+        kBlurStyleCount
+    };
+
+    /** Create a blur maskfilter.
+        @param radius   The radius to extend the blur from the original mask. Must be > 0.
+        @param style    The BlurStyle to use
+        @return The new blur maskfilter
+    */
+    static SkMaskFilter* Create(SkScalar radius, BlurStyle style);
+
+    /** Create an emboss maskfilter
+        @param direction    array of 3 scalars [x, y, z] specifying the direction of the light source
+        @param ambient      0...1 amount of ambient light
+        @param specular     coefficient for specular highlights (e.g. 8)
+        @param blurRadius   amount to blur before applying lighting (e.g. 3)
+        @return the emboss maskfilter
+    */
+    static SkMaskFilter* CreateEmboss(  const SkScalar direction[3],
+                                        SkScalar ambient, SkScalar specular,
+                                        SkScalar blurRadius);
+
+private:
+    SkBlurMaskFilter(); // can't be instantiated
+};
+
+#endif
+