src/third_party/skia/include/effects/SkDropShadowImageFilter.h

   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     static SkDropShadowImageFilter* Create(SkScalar dx, SkScalar dy,
  15                                            SkScalar sigmaX, SkScalar sigmaY, SkColor color,
  16                                            SkImageFilter* input = NULL,
  17                                            const CropRect* cropRect = NULL,
  18                                            uint32_t uniqueID = 0) {
  19         return SkNEW_ARGS(SkDropShadowImageFilter, (dx, dy, sigmaX, sigmaY,
  20                                                     color, input, cropRect, uniqueID));
  21     }
  22     virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE;
  23     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDropShadowImageFilter)
  24
  25 protected:
  26     SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor,
  27                             SkImageFilter* input, const CropRect* cropRect, uint32_t uniqueID);
  28 #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
  29     explicit SkDropShadowImageFilter(SkReadBuffer&);
  30 #endif
  31     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
  32     virtual bool onFilterImage(Proxy*, const SkBitmap& source, const Context&, SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
  33     virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
  34                                 SkIRect* dst) const SK_OVERRIDE;
  35
  36 private:
  37     SkScalar fDx, fDy, fSigmaX, fSigmaY;
  38     SkColor fColor;
  39     typedef SkImageFilter INHERITED;
  40 };