1 /* 2 * Copyright 2013 Google Inc. 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 SkDropShadowImageFilter_DEFINED 9 #define SkDropShadowImageFilter_DEFINED 10 11 #include "SkColor.h" 12 #include "SkImageFilter.h" 13 #include "SkScalar.h" 14 15 class SK_API SkDropShadowImageFilter : public SkImageFilter { 16 public: 17 enum ShadowMode { 18 kDrawShadowAndForeground_ShadowMode, 19 kDrawShadowOnly_ShadowMode, 20 21 kLast_ShadowMode = kDrawShadowOnly_ShadowMode 22 }; 23 24 static const int kShadowModeCount = kLast_ShadowMode+1; 25 26 static sk_sp<SkImageFilter> Make(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, 27 SkColor color, ShadowMode shadowMode, 28 sk_sp<SkImageFilter> input, 29 const CropRect* cropRect = nullptr); 30 31 SkRect computeFastBounds(const SkRect&) const override; 32 SK_TO_STRING_OVERRIDE() 33 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDropShadowImageFilter) 34 35 protected: 36 void flatten(SkWriteBuffer&) const override; 37 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, 38 SkIPoint* offset) const override; 39 sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override; 40 SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix&, MapDirection) const override; 41 42 private: 43 SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor, 44 ShadowMode shadowMode, sk_sp<SkImageFilter> input, 45 const CropRect* cropRect); 46 47 SkScalar fDx, fDy, fSigmaX, fSigmaY; 48 SkColor fColor; 49 ShadowMode fShadowMode; 50 51 typedef SkImageFilter INHERITED; 52 }; 53 54 #endif 55
