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 #include "SkColor.h" 9 #include "SkImageFilter.h" 10 #include "SkScalar.h" 11 12 class SK_API SkDropShadowImageFilter : public SkImageFilter { 13 public: 14 enum ShadowMode { 15 kDrawShadowAndForeground_ShadowMode, 16 kDrawShadowOnly_ShadowMode, 17 18 kLast_ShadowMode = kDrawShadowOnly_ShadowMode 19 }; 20 21 static const int kShadowModeCount = kLast_ShadowMode+1; 22 23 static SkDropShadowImageFilter* Create(SkScalar dx, SkScalar dy, 24 SkScalar sigmaX, SkScalar sigmaY, SkColor color, 25 ShadowMode shadowMode, 26 SkImageFilter* input = NULL, 27 const CropRect* cropRect = NULL) { 28 return SkNEW_ARGS(SkDropShadowImageFilter, (dx, dy, sigmaX, sigmaY, color, 29 shadowMode, input, cropRect)); 30 } 31 32 void computeFastBounds(const SkRect&, SkRect*) const override; 33 SK_TO_STRING_OVERRIDE() 34 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDropShadowImageFilter) 35 36 protected: 37 SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor, 38 ShadowMode shadowMode, SkImageFilter* input, const CropRect* cropRect); 39 void flatten(SkWriteBuffer&) const override; 40 bool onFilterImage(Proxy*, const SkBitmap& source, const Context&, SkBitmap* result, SkIPoint* loc) const override; 41 virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&, 42 SkIRect* dst) const override; 43 44 private: 45 SkScalar fDx, fDy, fSigmaX, fSigmaY; 46 SkColor fColor; 47 ShadowMode fShadowMode; 48 typedef SkImageFilter INHERITED; 49 }; 50