1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SkBlurMaskFilter_DEFINED 18 #define SkBlurMaskFilter_DEFINED 19 20 // we include this since our callers will need to at least be able to ref/unref 21 #include "SkMaskFilter.h" 22 #include "SkScalar.h" 23 24 class SkBlurMaskFilter { 25 public: 26 enum BlurStyle { 27 kNormal_BlurStyle, //!< fuzzy inside and outside 28 kSolid_BlurStyle, //!< solid inside, fuzzy outside 29 kOuter_BlurStyle, //!< nothing inside, fuzzy outside 30 kInner_BlurStyle, //!< fuzzy inside, nothing outside 31 32 kBlurStyleCount 33 }; 34 35 /** Create a blur maskfilter. 36 @param radius The radius to extend the blur from the original mask. Must be > 0. 37 @param style The BlurStyle to use 38 @return The new blur maskfilter 39 */ 40 static SkMaskFilter* Create(SkScalar radius, BlurStyle style); 41 42 /** Create an emboss maskfilter 43 @param direction array of 3 scalars [x, y, z] specifying the direction of the light source 44 @param ambient 0...1 amount of ambient light 45 @param specular coefficient for specular highlights (e.g. 8) 46 @param blurRadius amount to blur before applying lighting (e.g. 3) 47 @return the emboss maskfilter 48 */ 49 static SkMaskFilter* CreateEmboss( const SkScalar direction[3], 50 SkScalar ambient, SkScalar specular, 51 SkScalar blurRadius); 52 53 private: 54 SkBlurMaskFilter(); // can't be instantiated 55 }; 56 57 #endif 58 59