ae761f7545
SkImageFilter had some non-const methods that could all be made const. This is a first step towards making SkImageFilter immutable. BUG=skia:2097 R=mtklein@google.com, reed@google.com, robertphillips@google.com Author: dominikg@chromium.org Review URL: https://codereview.chromium.org/148883011 git-svn-id: http://skia.googlecode.com/svn/trunk@13330 2bbb7eff-a529-9590-31e7-b0007b416f81
65 lines
2.2 KiB
C++
65 lines
2.2 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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kKeyBits = 3 // Max value is 4, so 3 bits are required at most
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};
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SkDisplacementMapEffect(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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~SkDisplacementMapEffect();
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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 SkMatrix& ctm,
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SkBitmap* dst,
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SkIPoint* offset) const SK_OVERRIDE;
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virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
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virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
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SkIRect* dst) const SK_OVERRIDE;
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#if SK_SUPPORT_GPU
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virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
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virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
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SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
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#endif
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protected:
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explicit SkDisplacementMapEffect(SkReadBuffer& buffer);
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virtual void flatten(SkWriteBuffer&) const SK_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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