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 SkImageFilter* Create(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, 24 SkColor color, ShadowMode shadowMode, SkImageFilter* input = NULL, 25 const CropRect* cropRect = NULL) { 26 return new SkDropShadowImageFilter(dx, dy, sigmaX, sigmaY, color, shadowMode, input, 27 cropRect); 28 } 29 30 void computeFastBounds(const SkRect&, SkRect*) const override; 31 SK_TO_STRING_OVERRIDE() 32 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDropShadowImageFilter) 33 34 protected: 35 void flatten(SkWriteBuffer&) const override; 36 bool onFilterImageDeprecated(Proxy*, const SkBitmap& source, const Context&, SkBitmap* result, 37 SkIPoint* loc) const override; 38 void onFilterNodeBounds(const SkIRect& src, const SkMatrix&, 39 SkIRect* dst, MapDirection) const override; 40 41 private: 42 SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor, 43 ShadowMode shadowMode, SkImageFilter* input, const CropRect* cropRect); 44 45 SkScalar fDx, fDy, fSigmaX, fSigmaY; 46 SkColor fColor; 47 ShadowMode fShadowMode; 48 49 typedef SkImageFilter INHERITED; 50 }; 51