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64 lines
2.3 KiB
64 lines
2.3 KiB
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkDisplacementMapEffect_DEFINED
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#define SkDisplacementMapEffect_DEFINED
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#include "SkImageFilter.h"
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class SK_API SkDisplacementMapEffect : public SkImageFilter {
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public:
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enum ChannelSelectorType {
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kUnknown_ChannelSelectorType,
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kR_ChannelSelectorType,
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kG_ChannelSelectorType,
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kB_ChannelSelectorType,
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kA_ChannelSelectorType,
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kLast_ChannelSelectorType = kA_ChannelSelectorType
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};
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~SkDisplacementMapEffect() override;
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static sk_sp<SkImageFilter> Make(ChannelSelectorType xChannelSelector,
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ChannelSelectorType yChannelSelector,
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SkScalar scale,
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sk_sp<SkImageFilter> displacement,
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sk_sp<SkImageFilter> color,
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const CropRect* cropRect = nullptr);
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SkRect computeFastBounds(const SkRect& src) const override;
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virtual SkIRect onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
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MapDirection, const SkIRect* inputRect) const override;
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sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override;
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SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm,
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MapDirection, const SkIRect* inputRect) const override;
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protected:
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sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
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SkIPoint* offset) const override;
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SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
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ChannelSelectorType yChannelSelector,
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SkScalar scale, sk_sp<SkImageFilter> inputs[2],
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const CropRect* cropRect);
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void flatten(SkWriteBuffer&) const override;
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private:
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SK_FLATTENABLE_HOOKS(SkDisplacementMapEffect)
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ChannelSelectorType fXChannelSelector;
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ChannelSelectorType fYChannelSelector;
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SkScalar fScale;
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typedef SkImageFilter INHERITED;
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const SkImageFilter* getDisplacementInput() const { return getInput(0); }
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const SkImageFilter* getColorInput() const { return getInput(1); }
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};
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#endif
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