SkDropShadowImageFilter.h 1.8 KB

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