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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkDropShadowImageFilter_DEFINED
#define SkDropShadowImageFilter_DEFINED
#include "SkColor.h"
#include "SkFlattenable.h"
#include "SkImageFilter.h"
#include "SkScalar.h"
class SK_API SkDropShadowImageFilter : public SkImageFilter {
public:
enum ShadowMode {
kDrawShadowAndForeground_ShadowMode,
kDrawShadowOnly_ShadowMode,
kLast_ShadowMode = kDrawShadowOnly_ShadowMode
};
static const int kShadowModeCount = kLast_ShadowMode+1;
static sk_sp<SkImageFilter> Make(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY,
SkColor color, ShadowMode shadowMode,
sk_sp<SkImageFilter> input,
const CropRect* cropRect = nullptr);
SkRect computeFastBounds(const SkRect&) const override;
Factory getFactory() const override { return CreateProc; }
protected:
void flatten(SkWriteBuffer&) const override;
sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
SkIPoint* offset) const override;
sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override;
SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection, const SkIRect* inputRect) const override;
private:
SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor,
ShadowMode shadowMode, sk_sp<SkImageFilter> input,
const CropRect* cropRect);
static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&);
friend class SkFlattenable::PrivateInitializer;
SkScalar fDx, fDy, fSigmaX, fSigmaY;
SkColor fColor;
ShadowMode fShadowMode;
typedef SkImageFilter INHERITED;
};
#endif
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