1 /* 2 * Copyright 2006 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkBlurMaskFilter_DEFINED 9 #define SkBlurMaskFilter_DEFINED 10 11 // we include this since our callers will need to at least be able to ref/unref 12 #include "SkMaskFilter.h" 13 #include "SkScalar.h" 14 15 class SK_API SkBlurMaskFilter { 16 public: 17 enum BlurStyle { 18 kNormal_BlurStyle, //!< fuzzy inside and outside 19 kSolid_BlurStyle, //!< solid inside, fuzzy outside 20 kOuter_BlurStyle, //!< nothing inside, fuzzy outside 21 kInner_BlurStyle, //!< fuzzy inside, nothing outside 22 23 kBlurStyleCount 24 }; 25 26 enum BlurFlags { 27 kNone_BlurFlag = 0x00, 28 /** The blur layer's radius is not affected by transforms */ 29 kIgnoreTransform_BlurFlag = 0x01, 30 /** Use a smother, higher qulity blur algorithm */ 31 kHighQuality_BlurFlag = 0x02, 32 /** mask for all blur flags */ 33 kAll_BlurFlag = 0x03 34 }; 35 36 /** Create a blur maskfilter. 37 @param radius The radius to extend the blur from the original mask. Must be > 0. 38 @param style The BlurStyle to use 39 @param flags Flags to use - defaults to none 40 @return The new blur maskfilter 41 */ 42 static SkMaskFilter* Create(SkScalar radius, BlurStyle style, 43 uint32_t flags = kNone_BlurFlag); 44 45 /** Create an emboss maskfilter 46 @param direction array of 3 scalars [x, y, z] specifying the direction of the light source 47 @param ambient 0...1 amount of ambient light 48 @param specular coefficient for specular highlights (e.g. 8) 49 @param blurRadius amount to blur before applying lighting (e.g. 3) 50 @return the emboss maskfilter 51 */ 52 static SkMaskFilter* CreateEmboss( const SkScalar direction[3], 53 SkScalar ambient, SkScalar specular, 54 SkScalar blurRadius); 55 56 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() 57 private: 58 SkBlurMaskFilter(); // can't be instantiated 59 }; 60 61 #endif 62