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 "SkFlattenable.h" 13 #include "SkImageFilter.h" 14 #include "SkScalar.h" 15 16 class SK_API SkDropShadowImageFilter : public SkImageFilter { 17 public: 18 enum ShadowMode { 19 kDrawShadowAndForeground_ShadowMode, 20 kDrawShadowOnly_ShadowMode, 21 22 kLast_ShadowMode = kDrawShadowOnly_ShadowMode 23 }; 24 25 static const int kShadowModeCount = kLast_ShadowMode+1; 26 27 static sk_sp<SkImageFilter> Make(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, 28 SkColor color, ShadowMode shadowMode, 29 sk_sp<SkImageFilter> input, 30 const CropRect* cropRect = nullptr); 31 32 SkRect computeFastBounds(const SkRect&) const override; 33 34 protected: 35 void flatten(SkWriteBuffer&) const override; 36 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, 37 SkIPoint* offset) const override; 38 sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override; 39 SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, 40 MapDirection, const SkIRect* inputRect) const override; 41 42 private: 43 SK_FLATTENABLE_HOOKS(SkDropShadowImageFilter) 44 45 SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor, 46 ShadowMode shadowMode, sk_sp<SkImageFilter> input, 47 const CropRect* cropRect); 48 49 SkScalar fDx, fDy, fSigmaX, fSigmaY; 50 SkColor fColor; 51 ShadowMode fShadowMode; 52 53 typedef SkImageFilter INHERITED; 54 }; 55 56 #endif 57