d8ff5b336e
traversal which respects the CropRect. This is useful when you want the device-space bounds of a primitive after filtering. (This may also eventually subsume computeFastBounds()). This CL generalizes filterBounds() and onFilterBounds() to take a mapping direction. It also makes filterBounds() responsible for calling onFilterNodeBounds() and applying the crop rect, simplifying onFilterBounds(). BUG=skia:4627 GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1612953004 Review URL: https://codereview.chromium.org/1612953004
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/*
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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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#include "SkBitmap.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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};
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~SkDisplacementMapEffect();
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static SkImageFilter* Create(ChannelSelectorType xChannelSelector,
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ChannelSelectorType yChannelSelector,
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SkScalar scale, SkImageFilter* displacement,
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SkImageFilter* color = NULL,
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const CropRect* cropRect = NULL);
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)
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virtual bool onFilterImage(Proxy* proxy,
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const SkBitmap& src,
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const Context& ctx,
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SkBitmap* dst,
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SkIPoint* offset) const override;
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void computeFastBounds(const SkRect& src, SkRect* dst) const override;
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virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
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SkIRect* dst, MapDirection) const override;
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void onFilterNodeBounds(const SkIRect&, const SkMatrix&, SkIRect*, MapDirection) const override;
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#if SK_SUPPORT_GPU
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bool canFilterImageGPU() const override { return true; }
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virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
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SkBitmap* result, SkIPoint* offset) const override;
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#endif
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SK_TO_STRING_OVERRIDE()
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protected:
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SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
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ChannelSelectorType yChannelSelector,
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SkScalar scale, 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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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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